CN113689826B - A driving method of electronic paper, electronic paper and storage medium - Google Patents

Abstract

The present application discloses a driving method for electronic paper, electronic paper and a storage medium, which relate to the field of display technology and can solve the problem of frequent switching of high and low levels on the data signal line in the activation stage of the existing driving method, which may easily lead to Crosstalk on the display screen. Problems that affect the display effect of e-paper. The driving method of the electronic paper includes: inputting the first level and the second level alternately to the data signal line of the electronic paper according to the first set frequency to form an excitation stage for driving the electronic paper, wherein the first electric level greater than the second level, in each cycle of the excitation phase, a first transition level is set between the first level and the second level, and the first transition level lasts First set the time.

Description

A driving method of electronic paper, electronic paper and storage medium

technical field

The present application relates to the field of display technology, and in particular to a driving method for electronic paper, electronic paper and a storage medium.

Background technique

Electronic paper is a general term for a class of technologies. The English name is E-paper. Most of them use EPD (electrophoresis display, electrophoretic display) as the display panel. Its display effect is close to that of natural paper and avoids reading fatigue. The driving of existing electronic paper mainly includes a reverse phase, an activation phase, and a writing phase. In the activation phase, the particle balls in the electronic paper film are usually mixed evenly through frequent switching of high and low levels on the data signal line.

However, in the activation stage of the existing driving method, frequent switching of high and low levels on the data signal line may easily cause crosstalk (crosstalk) on the display screen, which affects the display effect of the electronic paper.

Contents of the invention

The embodiment of the present application provides an electronic paper driving method, electronic paper and storage medium, which can solve the problem of frequent switching of high and low levels on the data signal line in the activation stage of the existing driving method, which may easily lead to crosstalk on the display screen and affect the electronic paper. The problem of the display effect.

According to the first aspect of the embodiments of the present application, a method for driving electronic paper is provided, including:

According to the first set frequency, alternately input the first level and the second level to the data signal line of the electronic paper to form an excitation stage for driving the electronic paper, wherein the first level is greater than the second level, In each period of the excitation phase, a first transition level is set between the first level and the second level, and the first transition level lasts for a first set time.

In some embodiments, before the step of alternately inputting the first level and the second level to the data signal line of the electronic paper according to the first set frequency to form an excitation phase for driving the electronic paper, the step further includes:

The number of the first transition levels in each cycle of the excitation phase is determined according to the difference between the first level and the second level.

In some embodiments, the step of determining the number of the first transition levels in each cycle of the excitation phase according to the difference between the first level and the second level includes:

Determine the minimum turn-on voltage and the maximum turn-off voltage input by the scanning signal line of the electronic paper, wherein the minimum turn-on voltage is the minimum voltage that drives the gate electrode of the driving device of the electronic paper to turn on, and the maximum turn-off voltage is the driving the maximum voltage at which the gate electrode of the driving device is turned off;

According to the difference between the first level and the second level and the minimum turn-on voltage and the maximum turn-off voltage input by the scanning signal line, determine the first step in each cycle of the excitation phase - Number and value of transition levels.

In some implementations, the first set time is a multiple of the voltage offset time of the scanning signal line of the electronic paper, wherein the voltage offset of the scanning signal line is determined by the level of the data signal line Caused by alternating between the first level and the second level, the voltage shift time is the duration of the scan signal line voltage shift.

In some implementations, each cycle of the excitation phase includes a voltage rising half cycle and a voltage falling half cycle, the first transition level in the voltage rising half cycle is a rising transition level, and the voltage The first transition level in the falling half cycle is a falling transition level, and the voltage offset time includes an off-state voltage offset time and an on-state voltage offset time of the scanning signal line;

The first setting time corresponding to the rising transition level is 1-5 times of the off-state voltage offset time, and the first setting time corresponding to the falling transition level is the on-state 1-5 times of the voltage offset time, wherein the off-state voltage is the voltage at which the gate electrode of the driving device in the electronic paper is turned off, and the on-state voltage is the voltage at which the gate electrode of the driving device in the electronic paper is turned on.

In some embodiments, after the step of alternately inputting the first level and the second level to the data signal line of the electronic paper according to the first set frequency to form an excitation phase for driving the electronic paper, the step further includes:

According to the second setting frequency, the first level and the second level are alternately input to the data signal line to form a fast excitation stage for driving the electronic paper, wherein the second setting frequency is higher than the The first setting frequency, in each cycle of the fast excitation phase, a second transition level is set between the first level and the second level, and the second transition level lasts for a second set time.

In some implementations, within a single period, the number of the second transition levels is the same as the number of the first transition levels, and the second set time is different from the first set time.

In some implementation manners, in a half period formed by the adjacent first level and the second level, the number of the first transition levels is three.

The second aspect of the embodiments of the present application provides an electronic paper, including: an electronic paper screen and an electronic paper driving device;

The electronic paper driving device is configured to:

According to the first set frequency, alternately input the first level and the second level to the data signal line of the electronic paper to form an excitation stage for driving the electronic paper, wherein the first level is greater than the second level, In each period of the excitation phase, a first transition level is set between the first level and the second level, and the first transition level lasts for a first set time.

The third aspect of the embodiments of the present application provides a storage medium, the storage medium includes a stored computer program, wherein, when the computer program is running, the device where the storage medium is located is controlled to execute the computer program described in the first aspect. Paper drive method.

The electronic paper drive method, electronic paper, and storage medium provided in the embodiments of the present application, in the excitation phase of the electronic paper drive, according to the first set frequency, alternately input the first level and the second level to the data signal line of the electronic paper , the first level is greater than the second level, in each cycle of the excitation phase, a first transition level is set between the first level and the second level, and the first transition level lasts for a first set time. By setting the first transition level, and the transition level lasts for the first set time, the transition speed of the first level and the second level of the data signal line in the excitation phase can be delayed, and the difference between the first level transition can be reduced, thereby reducing the The capacitance of the coupling capacitor is small, thereby reducing the amplitude of the driving voltage of the driving device being pulled, which can avoid causing the state change of the driving device, and can improve the frequent high and low levels on the data signal line in the activation stage of the existing driving method. Switching will easily lead to Crosstalk on the display screen, which will affect the display effect of electronic paper.

Description of drawings

FIG. 1 is a schematic flow chart of an electronic paper driving method provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of a driving sequence of a data signal line of an electronic paper provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of a pixel structure of an electronic paper provided in an embodiment of the present application;

FIG. 4 is a schematic timing diagram of a data signal line of an electronic paper in an excitation phase provided by an embodiment of the present application;

FIG. 5 is a schematic timing diagram of a data signal line of an electronic paper in an excitation phase provided by an embodiment of the present application;

FIG. 6 is a schematic timing diagram of a data signal line of an electronic paper in a fast excitation stage provided by an embodiment of the present application;

FIG. 7 is a schematic structural block diagram of a storage medium provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a display device provided by an embodiment of the present application.

detailed description

In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below through the drawings and specific examples. The detailed description of the technical solutions of the embodiments is not a limitation to the technical solutions of this specification. In the case of no conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

In this document, relational terms such as first and second etc. are used only to distinguish one entity or operation from another without necessarily requiring or implying any such relationship between these entities or operations. Actual relationship or sequence. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element. The term "two or more" includes two or more cases.

E-paper is a general term for a class of technologies. The English name is E-paper. Most of them use EPD as the display panel. Its display effect is close to that of natural paper and avoids reading fatigue. The driving of existing electronic paper mainly includes a reverse phase, an activation phase, and a writing phase. In the activation phase, the particle balls in the electronic paper film are usually mixed evenly through frequent switching of high and low levels on the data signal line. However, in the activation stage of the existing driving method, frequent switching of high and low levels on the data signal line may easily lead to crosstalk on the display screen, affecting the display effect of the electronic paper.

In view of this, the embodiment of the present application provides a driving method for electronic paper, electronic paper and a storage medium, which can solve the problem of frequent switching of high and low levels on the data signal line in the activation stage of the existing driving method, which may easily lead to crosstalk on the display screen, affecting There is a problem with the display effect of electronic paper.

A first aspect of the embodiments of the present application provides a driving method for electronic paper, and FIG. 1 is a schematic flowchart of the driving method for electronic paper provided in the embodiment of the present application. As shown in FIG. 1, the driving method of electronic paper provided in the embodiment of the present application includes:

S100: Alternately input the first level and the second level to the data signal line of the electronic paper according to the first set frequency to form an excitation stage for driving the electronic paper, wherein the first level is greater than the second level, and in the excitation In each cycle of the stage, a first transition level is set between the first level and the second level, and the first transition level lasts for a first set time.

It should be noted that FIG. 2 is a schematic diagram of a driving sequence of a data signal line of an electronic paper provided in an embodiment of the present application. As shown in Figure 2, the driving of electronic paper mainly includes the reverse phase, the excitation phase and the writing phase. The high level input by the data signal line is 15V, and the low level is -15V. The electrical signals in the reverse phase and the writing phase are opposite, and the function of the reverse phase is to neutralize the charge in the electronic paper, so that the charge in the electronic paper remains balanced. In the writing phase, the driving signal to be displayed is written into the data signal line, therefore, the electrical signal in the reverse phase for balancing charges is opposite to that in the writing phase. The purpose of the activation stage is to mix the particle balls in the electronic paper film evenly through the frequent switching of high and low levels on the data signal line to prepare for the writing stage.

Exemplarily, FIG. 3 is a schematic diagram of a pixel structure of an electronic paper provided in an embodiment of the present application. As shown in Figure 3, the pixel area of the electronic paper is defined by the data signal line 100 and the scanning signal line 200, and the electronic paper film 300 and the driving device 400 are arranged in the pixel, and the driving device 400 is connected between the scanning signal line 200 and the data signal line 100. The particle balls in the electronic paper film 300 are driven to move under the action of the electronic paper film 300 to realize the display effect. Generally, the particle balls in the electronic paper include black balls, white balls or red balls, which are not specifically limited in this embodiment of the present application. The driving device 400 may be a transistor, the scanning signal line 200 is used to input the scanning signal to the gate electrode of the driving device 400 , and the data signal line 100 is used to input the data signal to the source electrode or the drain electrode of the driving device 400 . Combining Fig. 2 and Fig. 3, in the excitation stage, the high and low levels on the data signal line 100 are frequently refreshed, that is, the switching between high and low levels is extremely fast, the refresh frequency is fast, and the voltage difference between high and low levels reaches 30V. The region 120 overlapping with the scanning signal line 200 is likely to generate a coupling capacitance, and under the effect of the coupling capacitance, the driving voltage of the gate electrode of the driving device 400 is likely to be pulled. The driving voltage input to the scanning signal line 200 for driving the gate electrode of the driving device 400 includes an on-state voltage and an off-state voltage. The voltage at which the gate electrode is turned off, the turning on and off of the gate electrode of the driving device 400 is also the turning on and off of the driving device. Specifically, as an example, when the data signal line 100 drops from a high level (15V) to a low level (-15V) during the excitation phase, if the driving device 400 is in the on state, then the driving device 400 is in the on state. The voltage is VGH, then VGH is pulled down by the influence of the coupling capacitor, the normal VGH is 20V, after being pulled down, VGH usually becomes 9.5V, and the amplitude of being pulled down reaches 11.5V, when VGH becomes After 9.5V, it is easy to cause the driving device 400 that should be in the on state to be turned off, which will cause abnormal pixel display. When the data signal line 100 rises from a low level (-15V) to a high level (15V) during the excitation phase, if the driving device 400 is in an off state, the off-state voltage for driving the driving device 400 to be closed is VGL, and VGL is received The influence of the coupling capacitor is pulled up, and the normal VGL is -20V. After being pulled up, VGL usually becomes -8V, and the amplitude of being pulled up reaches 12V. After VGL becomes -8V, it is easy to cause the When the driving device 400 is turned on, electric leakage occurs, resulting in abnormal pixel display. Both of the above two situations will cause Crosstalk to occur on the display screen of the electronic paper during the activation phase.

Exemplarily, FIG. 4 is a schematic timing diagram of a data signal line of an electronic paper in an excitation phase according to an embodiment of the present application. As shown in Figure 4, in the driving method of the electronic paper provided by the embodiment of the present application, in the excitation stage, according to the first set frequency, the first level and the second level are alternately input to the data signal line of the electronic paper, as shown in Figure 4 As shown, the first level is high level, the second level is low level, the first level is 15V, and the second level is -15V. In each cycle of the excitation phase, the first level and the second level A first transition level V1 is set between the two levels, and the first transition level V1 lasts for a first set time T10. As shown in Figure 4, the number of the first transition level V1 in each cycle is 6, the number of the first transition level V1 in each half cycle is 3, and the value of the first transition level V1 in each cycle They are 7.5V, 0V, -7.5V respectively, and the numbers of the first transition levels V1 shown in FIG. 4 are only schematic. The numerical values of the high level, the low level, and the first transition level shown in FIG. 4 are all schematic, and are not intended to be specific limitations of this embodiment of the present application.

Exemplarily, continuing to refer to FIG. 4, when the data signal line 100 changes from a high level (15V) to a low level (-15V) during the excitation phase, since the first transition level V1 is set, at the first platform The first conversion occurs on the upper, and the conversion amplitude is 7.5V. If the driving device 400 is in the on state, the on-state voltage VGH that drives the driving device 400 is pulled down due to the influence of the coupling capacitance. The normal VGH is 20V. After pulling down, VGH can be converted to 12.5V, and the maximum amplitude of being pulled down will not exceed the jump value (7.5V) of the first transition level V1, and it may be lower, and VGH becomes 12.5V After V, the driving device 400 in the turned-on state will not be turned off under the action of VGH, and the state of the driving device 400 will not change, which will not cause abnormal pixel display. The data signal line 100 continues to change from 7.5V to 0V, that is, the second jump of the first transition level occurs, and then changes from 0V to -7.5V again, until it changes to -15V, and from 15V to -15V. There are four jumps, and the first three jumps will maintain the first set time T10. Since each jump of the first transition level V1 lasts for the first set time T10, the pulling of the driving voltage caused by the coupling capacitance generated by each level jump will resume within the first set time. Therefore, The starting point from which the driving voltage is pulled is the same for each level transition, so each level transition will not cause a change in the state of the driving device. Exemplarily, when the level of the data signal line jumps from 15V to 7.5V, the on-state voltage VGH of the scanning signal line is pulled down from 20V to 12.5V (in the case of the maximum pulling amplitude), and the data signal line When the voltage level is at 7.5V for the first setting time T10, the coupling capacitance between the data signal line and the scanning signal line due to the level jump will gradually discharge and disappear. Therefore, the on-state voltage VGH of the scanning signal line changes from 12.5 V returns to 20V. When the level of the data signal line jumps from 7.5V to 0V, the starting point where the on-state voltage VGH is pulled is still 20V, and the previous offset has been recovered, and the next offset will not be accumulated.

Continuing to refer to FIG. 4, when the data signal line 100 changes from a low level (-15V) to a high level (15V) during the excitation phase, the first transition level V1 occurs on the first platform due to the setting of the first transition level V1. Second conversion, converted to -7.5V, if the driving device 400 is in the off state, the off-state voltage VGL of the driving device 400 is pulled up due to the influence of the coupling capacitor, and the normal VGL is -20V. After being pulled up, VGL Usually it changes to -12.5V, and the amplitude of being pulled up will not exceed 7.5V. After VGL becomes -12.5V, the driving device 400 in the off state will not turn on, and the state of the driving device 400 does not change, then no Leakage will occur, which will not cause abnormal pixel display. The driving method of the electronic paper provided by the embodiment of the present application, by setting the first transition level, can delay the level change speed of the data signal line in the excitation stage, reduce the capacitance of the coupling capacitor, thereby reducing the driving voltage of the driving device The pulled amplitude will not cause the state change of the driving device, which can improve the activation stage of the existing driving method. Frequent switching of high and low levels on the data signal line will easily lead to Crosstalk on the display screen, which will affect the display effect of electronic paper. The problem.

It should be noted that, in the excitation phase, the number of first transition levels in each half period may still be 1, 2, 5, etc., which is not specifically limited in this embodiment of the present application.

In the electronic paper driving method provided by the embodiment of the present application, in the excitation phase of the electronic paper drive, the first level and the second level are alternately input to the data signal line of the electronic paper according to the first set frequency, and the first level is greater than For the second level, in each cycle of the excitation phase, a first transition level is set between the first level and the second level, and the first transition level lasts for a first set time. By setting the first transition level, and the transition level lasts for the first set time, the transition speed of the first level and the second level of the data signal line in the excitation phase can be delayed, and the difference between the first level transition can be reduced, thereby reducing the The capacitance of the coupling capacitor is small, thereby reducing the amplitude of the driving voltage of the driving device being pulled, which can avoid causing the state change of the driving device, and can improve the frequent high and low levels on the data signal line in the activation stage of the existing driving method. Switching will easily lead to Crosstalk on the display screen, which will affect the display effect of electronic paper.

In some embodiments, before step S100, it may also include:

According to the difference between the first level and the second level, the number of first transition levels in each cycle of the excitation phase is determined. The difference between the first level and the second level is the maximum voltage difference between the high and low levels of the data signal line during the excitation phase. In different electronic paper drive circuits, the voltage difference between the high and low levels of the excitation phase used may exist. Differences in design. In order to ensure that the high-low level transition of the data signal line will not cause the state change of the driving device during the excitation phase, the greater the voltage difference between the high and low levels during the excitation phase, the more the number of first transition levels that need to be set. The smaller the voltage difference between the high and low levels of the stage, the fewer the number of first transition levels that need to be set.

The electronic paper driving method provided in the embodiment of the present application determines the number of first transition levels in each cycle of the excitation phase according to the difference between the first level and the second level, which can be used for driving different electronic papers. The setting of the circuit sets the number of the first transition level to provide a differentiated driving scheme, further ensuring that the state of the driving device will not be changed during the excitation phase of the driving data signal line, thereby avoiding the occurrence of Crosstalk on the display screen and improving The display effect of electronic paper.

In some embodiments, the step of determining the number of first transition levels in each cycle of the excitation phase according to the difference between the first level and the second level may include:

Determine the minimum turn-on voltage and the maximum turn-off voltage input by the scanning signal line of the electronic paper, wherein the minimum turn-on voltage is the minimum voltage at which the gate electrode of the driving device driving the electronic paper is turned on, and the maximum turn-off voltage is the maximum voltage at which the gate electrode of the driving device is turned off. Voltage. Determining the minimum turn-on voltage and the maximum turn-off voltage input by the scanning signal line of the electronic paper can be achieved through multiple experiments. Exemplarily, in the excitation phase of driving the electronic paper, input different high levels and different low levels to the scanning signal lines respectively, and observe whether Crosstalk occurs on the display screen of the electronic paper. The operation of inputting a high level to the scanning signal line may be called external filling VGH, and inputting a low level to the scanning signal line may be called external filling VGL. Specifically, the experimental data and results of externally injected VGH and externally injected VGL are shown in Table 1. Table 1 shows the experimental data and experimental results of externally injected VGH and externally injected VGL in the excitation phase of the test drive electronic paper.

Table 1

It can be seen from Table 1 that when the input voltage of the scanning signal line is 10V, the display screen is still OK, and the Crosstalk phenomenon does not appear, so the minimum turn-on voltage of the electronic paper scanning signal line input is 10V. When the voltage input by the scanning signal line is -8V, the display screen is NG, and the display screen has a Crosstalk phenomenon. When the voltage input by the scanning signal line is -9V, the display screen is OK, and the display screen does not appear Crosstalk phenomenon, then the electronic paper The maximum turn-off voltage input by the scanning signal line is -8V, and the experimental data and experimental results shown in Table 1 are only illustrative, and are not intended to be specific limitations of the embodiments of the present application.

According to the difference between the first level and the second level and the minimum turn-on voltage and the maximum turn-off voltage input by the scanning signal line, the quantity and value of the first transition level in each cycle of the excitation phase are determined. While considering the difference between the first level and the second level, it is also necessary to consider the values of the minimum turn-on voltage and the maximum turn-off voltage, so as to determine the number and value of the first transition level in each cycle, which can be Avoid the occurrence of Crosstalk on the display screen during the activation phase to the greatest extent, and improve the display effect of the electronic paper.

Exemplarily, the first level is 15V, the second level is -15V, the high-low level conversion voltage difference in the excitation stage is 30V, the on-state voltage of the input driving device is 20V, and the off-state voltage of the input driving device is - 20V. The minimum turn-on voltage determined by experiments or other methods is 10V, and the maximum turn-off voltage is -8V. Then the on-state voltage of the driving device is allowed to pull down the amplitude of 10V, and the off-state voltage of the driving device is allowed to be pulled up. is 12V. Therefore, the quantity of the first transition level in each half period (a high-low level conversion) of the excitation phase can be 1, and the quantity of the first transition level in each period is 2, and in each period The value of the first transition level can be 5V and -5V, that is, the level conversion process of the data signal line in each cycle includes: 15V→5V, 5V→-5V, -5V→-15V, -15V→-5V, -5V→5V, 5V→15V, in each level jump, the level jump amplitude is 10V, therefore, the pulling amplitude of the driving voltage caused by the coupling capacitor will not exceed 10V, which can meet the requirements of the driving device The minimum turn-on voltage is 10V, and the maximum turn-off voltage is -8V.

The electronic paper driving method provided by the embodiment of the present application is based on the difference between the first level and the second level, and also based on the values of the minimum turn-on voltage and the maximum turn-off voltage. The number and value of the first transition level can avoid the occurrence of Crosstalk on the display screen during the excitation phase to the greatest extent, and improve the display effect of the electronic paper.

In some implementations, the first set time is a multiple of the voltage offset time of the scanning signal line of the electronic paper, wherein the voltage offset of the scanning signal line is determined by the level of the data signal line between the first level and the second level. Caused by alternating between levels, the voltage offset time is the duration of the voltage offset of the scanning signal line.

Under the action of the coupling capacitor, the voltage on the scanning signal line will be pulled, that is, pulled up or pulled down, and the voltage shift will occur during the pulling process. Since the coupling capacitor is generated instantaneously, the voltage shift of the scanning signal line The duration will not be too long, and it will return to the normal value afterwards. Therefore, it is necessary to ensure that the voltage of the scanning signal line returns to the normal value before continuing the next level change of the data signal line. Therefore, the first transition level maintained The first setting time needs to be longer than the voltage offset time of the scanning signal line. The first setting time is a multiple of the voltage offset time of the scanning signal line of the electronic paper, which can ensure that the voltage offset of the current scanning signal line has enough time Restoration will not affect or accumulate to the next level change of the data signal line.

It should be noted that, in the driving method of the electronic paper provided by the present application, by setting the first transition level and the first transition level lasts for the first set time, the on-state voltage of the scanning signal line can still be kept stable after being pulled down. Greater than the minimum turn-on voltage, the off-state voltage of the scanning signal line can still be less than the maximum turn-off voltage after being pulled up, so as to ensure that in the excitation phase of driving the data signal line, each level change will not cause a change in the state of the driving device. Furthermore, the occurrence of Crosstalk on the display screen is avoided, and the display effect of the electronic paper is improved.

In the driving method of the electronic paper provided in the embodiment of the present application, the first set time is a multiple of the voltage offset time of the scanning signal line of the electronic paper, which can ensure that the voltage offset of the current scanning signal line has enough time to recover, and will not Affect or accumulate to the level change of the next data signal line, so as to ensure that in the excitation phase of driving the data signal line, each level change will not cause a change in the state of the driving device, thereby avoiding the occurrence of Crosstalk on the display screen. Improve the display effect of electronic paper.

In some implementations, each cycle of the excitation phase includes a voltage rising half cycle and a voltage falling half cycle, the first transition level in the voltage rising half cycle is the rising transition level, and the first transition level in the voltage falling half cycle is The level is a falling transition level, and the voltage offset time includes the off-state voltage offset time and the on-state voltage offset time of the scanning signal line.

The first setting time corresponding to the rising transition level is 1-5 times of the off-state voltage offset time, and the first setting time corresponding to the falling transition level is 1-5 times of the on-state voltage offset time, wherein, The off-state voltage is the voltage at which the gate electrode of the driving device in the electronic paper is turned off, and the on-state voltage is the voltage at which the gate electrode of the driving device in the electronic paper is turned on.

Exemplarily, FIG. 5 is a schematic timing diagram of a data signal line of an electronic paper in an excitation phase according to an embodiment of the present application. As shown in Figure 5, each period F of the excitation phase includes a voltage rising half period F1 and a voltage falling half period F2, the first transition level in the voltage rising half period F1 is a rising transition level, and the rising transition level lasts The first setting time of the voltage is the first rising setting time T11, the first transition level in the voltage drop half cycle F2 is the falling transition level, and the first setting time of the falling transition level is the first falling setting Time T12, the voltage offset time includes the off-state voltage offset time and the on-state voltage offset time of the scanning signal line. The off-state voltage offset time is the duration during which the VGL of the scanning signal line is pulled up, and the on-state voltage offset time is the duration during which the VGH of the scanning signal line is pulled down. The offset time of the off-state voltage and the offset time of the off-state voltage may be the same or different, then the first rising set time T11 and the first falling set time T12 may be the same or different, therefore, in one of the excitation stages The first rising set time T11 and the first falling set time T12 in the period T can be set separately.

The first rising setting time T11 corresponding to the rising transition level is 1-5 times of the off-state voltage offset time, and the first falling setting time T12 corresponding to the falling transition level is 1-5 times of the on-state voltage offset time times, where the off-state voltage is the voltage at which the gate electrode of the driving device in the electronic paper is turned off, and the on-state voltage is the voltage at which the gate electrode of the driving device in the electronic paper is turned on. The first rising setting time T11 corresponding to the rising transition level is a multiple of the off-state voltage offset time, which must be at least 1 times first, otherwise it is difficult to achieve the transition between the first level and the second level of the data signal line in the delay excitation phase If the effect of speed is greater than 5 times, the transition time will be lengthened, the maintenance time of the first level and the second level will be reduced, and the effect of the excitation stage on the mixing of particle balls will be affected.

In the driving method of electronic paper provided by the embodiment of the present application, the first rising setting time T11 and the first falling setting time T12 can be set separately in one cycle T of the excitation phase, and the first rising setting corresponding to the rising transition level The fixed time T11 is 1-5 times of the offset time of the off-state voltage, and the first falling setting time T12 corresponding to the falling transition level is 1-5 times of the offset time of the on-state voltage. The duration of the first transition level in the voltage drop half cycle F2 is set according to the off-state voltage offset time, and the duration of the first transition level in the voltage rise half cycle F1 is set by the on-state voltage offset time, which can achieve accurate The switching speed of the first level and the second level of the data signal line in the excitation phase is delayed, so as to avoid the Crosstalk of the display screen during the excitation phase, thereby improving the display effect of the electronic paper.

In some embodiments, after step S100, it may further include:

According to the second set frequency, alternately input the first level and the second level to the data signal line to form a fast excitation stage for driving the electronic paper, wherein the second set frequency is greater than the first set frequency, and in the fast excitation stage In each period of , a second transition level is set between the first level and the second level, and the second transition level lasts for a second set time.

It should be noted that when there are only black and white balls in the electronic paper film, only the excitation stage can be set. Compared with the fast excitation stage, the excitation stage corresponding to the first set frequency can be regarded as slow excitation. If there are red balls in the electronic paper film, it is necessary to set the fast excitation stage. Compared with the slow excitation, the fast excitation stage is mainly for the mixing of black balls and red balls. According to the characteristics of the red balls, the first stage of the fast excitation stage The second setting frequency needs to be greater than the first setting frequency, that is, the mixing of black balls and red balls requires a faster refresh rate of high and low levels. Since the first transition level is set in the excitation stage, the second transition level also needs to be set in the fast excitation stage. The setting of the second transition level can avoid Crosstalk in the display screen during the fast excitation stage, thereby improving the display of electronic paper. Effect.

Exemplarily, FIG. 6 is a schematic timing diagram of a data signal line of an electronic paper in a fast excitation phase according to an embodiment of the present application. As shown in FIG. 6, in each cycle of the fast excitation phase, a second transition level V2 is set between the first level and the second level, and the second transition level lasts for a second set time T20. In the half cycle of the voltage rise in the fast excitation stage, the second set time for the second transition level V2 to last is the second rise set time T21, and in the half cycle of the voltage drop in the fast excitation stage, the second transition level V2 The continued second set time is the second falling set time T22. The second rising set time T21 and the second falling set time T22 may be the same or different, which is not specifically limited in this embodiment of the present application.

The driving method of the electronic paper provided in the embodiment of the present application can be used in the driving scheme of the electronic paper film containing red balls by adding a fast excitation stage, and setting the second transition level in the fast excitation stage can avoid Crosstalk on the display screen occurs in stages, further improving the display effect of electronic paper.

In some implementations, within a single period, the number of the second transition levels is the same as the number of the first transition levels, and the second set time is different from the first set time.

In the driving method of electronic paper provided by the embodiment of the present application, since the high level and low level of the fast excitation phase are the same as the high level and low level of the excitation phase, in a single cycle, the first transition level and the second transition level The number of levels can be the same, but because the second set frequency is greater than the first set frequency, the refreshing of the fast excitation phase is faster than the refresh of the excitation phase, so that the offset time of the voltage on the scanning signal line being pulled is not Therefore, the first set time and the second set time cannot be the same.

In some implementations, in a half period formed by adjacent first levels and second levels, the number of first transition levels is three. Referring to FIG. 5 , there are three first transition levels in the voltage rising half cycle, and three first transition levels in the voltage falling half cycle. The high level used in the excitation stage of the existing electronic paper drive is usually 15V, the low level is usually -15V, and the voltage difference between the high and low levels is 30V. In each half cycle, the number of the first transition level is set to 3, can fully guarantee the transition speed of the first level and the second level of the data signal line in the delay excitation phase, and the effect of delaying the transition time of high and low levels in the excitation phase is better, avoiding the occurrence of Crosstalk in the display screen during the excitation phase, thereby improving The display effect of electronic paper.

It should be noted that the voltage and level mentioned in this application can be regarded as equivalent concepts, and this application does not make a distinction.

The second aspect of the embodiments of the present application provides an electronic paper, including: an electronic paper screen and an electronic paper driving device; the electronic paper driving device is configured to:

According to the first set frequency, the first level and the second level are alternately input to the data signal line of the electronic paper to form an excitation stage for driving the electronic paper, wherein the first level is greater than the second level, and in the excitation In each cycle of the stage, a first transition level is set between the first level and the second level, and the first transition level lasts for a first set time.

The driving object of the driving steps performed by the electronic paper drive device is configured to be the electronic paper screen, and the electronic paper screen is provided with data signal lines, scanning signal lines and pixels. to the data signal lines and scan signal lines.

The electronic paper provided in the embodiment of the present application is driven by using the driving method provided in the first aspect. In the excitation phase of the electronic paper drive, according to the first set frequency, the data signal line of the electronic paper is alternately input with the first level and the second level. Level, the first level is greater than the second level, in each cycle of the excitation phase, a first transition level is set between the first level and the second level, and the first transition level lasts for the first setting time. By setting the first transition level, and the transition level lasts for the first set time, the transition speed of the first level and the second level of the data signal line in the excitation phase can be delayed, and the difference between the first level transition can be reduced, thereby reducing the The capacitance of the coupling capacitor is small, thereby reducing the amplitude of the driving voltage of the driving device being pulled, which can avoid causing the state change of the driving device, and can improve the frequent high and low levels on the data signal line in the activation stage of the existing driving method. Switching will easily lead to Crosstalk on the display screen, which will affect the display effect of electronic paper.

A third aspect of the embodiment of the present application provides a storage medium, and FIG. 8 is a schematic structural block diagram of the storage medium provided in the embodiment of the present application. The storage medium 2000 includes a stored computer program 2100, wherein when the computer program 2100 is running, the device where the storage medium is located is controlled to execute the method for driving electronic paper according to any one of the first aspect.

The driving method of the electronic paper includes the following steps:

According to the first set frequency, the first level and the second level are alternately input to the data signal line of the electronic paper to form an excitation phase for driving the electronic paper, wherein the first level is greater than the second level, and in the excitation phase In each period, a first transition level is set between the first level and the second level, and the first transition level lasts for a first set time.

A fourth aspect of the embodiment of the present application provides a display device, and FIG. 8 is a schematic structural diagram of the display device provided by the embodiment of the present application. As shown in FIG. 8 , the display device provided by the embodiment of the present application includes: the electronic paper 1000 described in the second aspect.

The display device provided in the embodiment of the present application may be an e-book reading tablet, or a display in other applications, which is not specifically limited in this application.

While the preferred embodiments of the present specification have been described, additional changes and modifications can be made to these embodiments by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be interpreted to cover the preferred embodiment as well as all changes and modifications that fall within the scope of this specification.

Obviously, those skilled in the art can make various changes and modifications to this description without departing from the spirit and scope of this description. In this way, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalent technologies, this specification also intends to include these modifications and variations.

Claims (9)

1. A method of driving electronic paper, comprising:

alternately inputting a first level and a second level to a data signal line of the electronic paper at a first set frequency to form an excitation phase for driving the electronic paper, wherein the first level is greater than the second level, a first transition level is provided between the first level and the second level in each period of the excitation phase, the first transition level lasts for a first set time, the number and value of the first transition levels are determined according to the difference between the first level and the second level, and the first transition level is greater than the second level and less than the first level.

2. The method for driving electronic paper of claim 1, wherein the step of alternately inputting the first level and the second level to the data signal line of the electronic paper at the first set frequency to form the excitation phase for driving the electronic paper is preceded by the step of:

determining a minimum on-voltage and a maximum off-voltage input by a scanning signal line of the electronic paper, wherein the minimum on-voltage is a minimum voltage for driving a gate electrode of a driving device of the electronic paper to be on, and the maximum off-voltage is a maximum voltage for driving the gate electrode of the driving device to be off;

and determining the number and the value of the first transition level in each period of the excitation phase according to the difference value of the first level and the second level and the minimum on voltage and the maximum off voltage input by the scanning signal line.

3. The electronic paper driving method according to claim 1, wherein the first set time is a multiple of a voltage shift time of a scanning signal line of the electronic paper, wherein the voltage shift of the scanning signal line is caused by the level of the data signal line alternating between the first level and the second level, the voltage shift time being a duration of the scanning signal line voltage shift.

4. The electronic paper driving method according to claim 3, wherein each period of the excitation phase includes a voltage rising half period and a voltage falling half period, the first transition level in the voltage rising half period is a rising transition level, the first transition level in the voltage falling half period is a falling transition level, and the voltage shift time includes an off-state voltage shift time and an on-state voltage shift time of the scanning signal line;

the first set time corresponding to the rising transition level is 1-5 times of the off-state voltage shift time, and the first set time corresponding to the falling transition level is 1-5 times of the on-state voltage shift time, wherein the off-state voltage is a voltage at which a gate electrode of a driving device in the electronic paper is turned off, and the on-state voltage is a voltage at which the gate electrode of the driving device in the electronic paper is turned on.

5. The method for driving electronic paper according to claim 1, wherein the step of alternately inputting the first level and the second level to the data signal line of the electronic paper at the first set frequency to form the excitation phase for driving the electronic paper further comprises:

and alternately inputting the first level and the second level to the data signal line according to a second set frequency to form a rapid excitation stage for driving the electronic paper, wherein the second set frequency is greater than the first set frequency, and a second transition level is arranged between the first level and the second level in each period of the rapid excitation stage and lasts for a second set time.

6. The electronic paper driving method according to claim 5, wherein the number of the second transition levels is the same as the number of the first transition levels in a single period, and the second set time is different from the first set time.

7. The electronic paper driving method according to claim 1, wherein the number of the first transition levels is three in a half period composed of the first level and the second level which are adjacent to each other.

8. An electronic paper, comprising: an electronic paper screen and an electronic paper driving device;

the electronic paper driving apparatus is configured to:

alternately inputting a first level and a second level to a data signal line of the electronic paper at a first set frequency to form an excitation phase for driving the electronic paper, wherein the first level is greater than the second level, a first transition level is provided between the first level and the second level in each period of the excitation phase, the first transition level lasts for a first set time, the number and value of the first transition levels are determined according to the difference between the first level and the second level, and the first transition level is greater than the second level and less than the first level.

9. A storage medium characterized by comprising a stored computer program, wherein the apparatus in which the storage medium is located is controlled to execute the driving method of electronic paper according to any one of claims 1 to 7 when the computer program is run.

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