Driving method, driving device and display device of display panel

Abstract

The present disclosure provides a driving method of a display panel, a driving device and a display device, the display panel comprising: a plurality of pixels; each of the plurality of pixels comprising: a pixel electrode, the pixel electrode comprising a plurality of sub-electrodes arranged at intervals; the driving method comprising: in a picture display stage, loading a driving voltage signal on the plurality of sub-electrodes in a set pixel at least once in a sequential order, so that the set pixel is converted from a first state to a second state.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a driving method and a driving device for a display panel, and a display device. Background Art

[0002] With the development of display technology, electronic paper technology, with its unique advantages of ultra-low power consumption and ability to replicate the visual quality of paper, is becoming increasingly common in e-book reading devices. Specifically, electronic paper technology controls the electric field so that color ions in an electrophoretic layer move according to the magnitude and direction of the applied electric field, maintaining their position when the field is applied. Electronic paper display devices, on the other hand, manipulate the electric field to move the color ions in the electrophoretic layer to a predetermined position, where they reflect light under external illumination to create a display. Summary of the Invention

[0003] The embodiment of the present disclosure provides a method for driving a display panel, wherein the display panel includes: a plurality of pixels; each of the plurality of pixels includes: a pixel electrode, wherein the pixel electrode includes a plurality of sub-electrodes spaced apart from each other;

[0004] The driving method includes:

[0005] During the picture display phase, a driving voltage signal is applied to a plurality of sub-electrodes in the set pixel in sequence at least once, so that the set pixel is converted from a first state to a second state.

[0006] In some possible implementations, the plurality of sub-electrodes include a first sub-electrode to an Nth sub-electrode sequentially arranged along a row direction of the pixels, where N is an integer and N≥2;

[0007] The applying driving voltage signals to the plurality of sub-electrodes in the set pixel in sequence includes:

[0008] A driving voltage signal is applied to the plurality of sub-electrodes in the set pixel in a sequence from the first sub-electrode to the Nth sub-electrode.

[0009] In some possible implementations, applying the driving voltage signal to the plurality of sub-electrodes in the set pixel in order from the first sub-electrode to the Nth sub-electrode includes:

[0010] According to a set time interval, a driving voltage signal is applied to the plurality of sub-electrodes in the set pixel in a sequence from the first sub-electrode to the Nth sub-electrode.

[0011] In some possible implementations, applying a driving voltage signal to the plurality of sub-electrodes in the set pixel includes:

[0012] The voltages of the driving voltage signals applied to the plurality of sub-electrodes in the set pixel are sequentially decreased or increased in order from the first sub-electrode to the Nth sub-electrode.

[0013] In some possible implementations, when driving voltage signals are loaded on multiple pixel sub-electrodes in the set pixel in sequence at one time during the picture display stage, the voltages of the driving voltage signals loaded on the n-th sub-electrodes in different pixels are the same.

[0014] In some possible implementations, applying a driving voltage signal to the plurality of sub-electrodes in the set pixel includes:

[0015] The voltage of the driving voltage signal applied to the plurality of sub-electrodes in the set pixel is the same.

[0016] In some possible implementations, before the picture display stage, the method further includes: a reverse stage;

[0017] In the reverse phase, a reverse voltage signal is applied to the plurality of sub-electrodes in the set pixel.

[0018] In some possible embodiments, the display panel is an electronic paper display panel; the display panel further includes a first base substrate; each of the plurality of pixels further includes: a common electrode and an electrophoretic liquid layer, the common electrode being located on a side of the pixel electrode facing away from the first base substrate, and the electrophoretic liquid layer being located between the pixel electrode and the common electrode;

[0019] The electrophoretic liquid layer includes black charged particles, white charged particles, and at least one color charged particle, and the black charged particles, the white charged particles, and the color charged particles correspond to driving voltage signals of different voltages.

[0020] In some possible implementations, the reverse voltage signals corresponding to the black charged particles, the white charged particles, and the colored charged particles have different voltages.

[0021] In some possible implementations, each of the plurality of pixels further includes: a plurality of conduction control circuits and a plurality of data lines;

[0022] One of the conduction control circuits in the same pixel is coupled to a sub-electrode in the sub-electrodes;

[0023] A column of pixels corresponds to a plurality of data lines, and one of the plurality of conduction control circuits in the same pixel is coupled to a corresponding one of the plurality of data lines;

[0024] The conduction control circuit is configured to provide the driving voltage signal loaded on the coupled data line to the coupled sub-electrode under the control of the signal at the scan signal terminal.

[0025] In some possible implementations, the display panel further includes: a plurality of scan lines;

[0026] A row of pixels corresponds to one of the plurality of scan lines, and scan signal terminals of a plurality of conduction control circuits in the row of pixels are coupled to the corresponding scan line.

[0027] In some possible implementations, the conduction control circuit includes: a conduction control transistor;

[0028] The gate of the conduction control transistor is coupled to the scan signal terminal, the first electrode of the conduction control transistor is coupled to the corresponding data line, and the second electrode of the conduction control transistor is coupled to the corresponding sub-electrode.

[0029] The embodiment of the present disclosure provides a driving device for a display panel, wherein the display panel includes: a plurality of pixels; each of the plurality of pixels includes: a pixel electrode, wherein the pixel electrode includes a plurality of sub-electrodes spaced apart from each other;

[0030] The driving device is configured to apply a driving voltage signal to a plurality of sub-electrodes in the set pixel in a sequential order at least once during a picture display phase, so as to convert the set pixel from a first state to a second state.

[0031] A display device provided by an embodiment of the present disclosure includes a display panel and a driving device for the display panel.

[0032] In some possible embodiments, the display panel is an electronic paper display panel; the display panel further includes a first base substrate; each of the plurality of pixels further includes: a common electrode and an electrophoretic liquid layer, the common electrode being located on a side of the pixel electrode facing away from the first base substrate, and the electrophoretic liquid layer being located between the pixel electrode and the common electrode;

[0033] The electrophoretic liquid layer includes black charged particles, white charged particles, and at least one color charged particle, and the black charged particles, the white charged particles, and the color charged particles correspond to driving voltage signals of different voltages. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Some structural schematic diagrams of display panels provided by embodiments of the present disclosure;

[0035] Figure 2 A flowchart of a method for driving a display panel provided in an embodiment of the present disclosure;

[0036] Figure 3 Other structural schematic diagrams of display panels provided by embodiments of the present disclosure;

[0037] Figure 4 Some further structural schematic diagrams of display panels provided by embodiments of the present disclosure;

[0038] Figure 5 Some signal timing diagrams provided for embodiments of the present disclosure;

[0039] Figure 6 Some further structural schematic diagrams of display panels provided by embodiments of the present disclosure;

[0040] Figure 7 Some further structural schematic diagrams of display panels provided by embodiments of the present disclosure;

[0041] Figure 8 Some further structural schematic diagrams of display panels provided in embodiments of the present disclosure. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. And in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0043] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0044] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual scale and are only for the purpose of illustrating the present disclosure. The same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0045] The display panel provided in the embodiment of the present disclosure is an electronic paper display panel, such as Figure 1 As shown, it includes: a plurality of pixels 1, a first substrate 10;

[0046] Each pixel 1 of the plurality of pixels 1 comprises:

[0047] The pixel electrode 11 includes a plurality of sub-electrodes (eg Figure 1 11-1, 11-2, 11-3, 11-4);

[0048] a common electrode 12 and an electrophoretic liquid layer 14 , wherein the common electrode 12 is located on a side of the pixel electrode 11 away from the first base substrate 10 , and the electrophoretic liquid layer 14 is located between the pixel electrode 11 and the common electrode 12 ;

[0049] The electrophoretic liquid layer 14 includes black charged particles B, white charged particles W, and at least one color charged particle R. The black charged particles B, the white charged particles W, and the color charged particles R correspond to driving voltage signals of different voltages.

[0050] In some embodiments of the present disclosure, Figure 1 As shown, the voltages of the reverse voltage signals corresponding to the black charged particles B, the white charged particles W, and the colored charged particles R are different.

[0051] Exemplarily, the colored charged particles can be at least one of red charged particles, green charged particles and yellow charged particles. For example, the colored charged particles can be one of red charged particles, green charged particles and yellow charged particles, or a combination of two of red charged particles, green charged particles and yellow charged particles, or a collection of red charged particles, green charged particles and yellow charged particles, which is not limited here.

[0052] For example, black charged particles are negatively charged, white charged particles are positively charged, and colored charged particles are positively charged; of course, black charged particles can also be positively charged, white charged particles can also be negatively charged, and colored charged particles can also be negatively charged, which is not limited here.

[0053] In the embodiment of the present disclosure, the following description will be made by taking the colored charged particles R as red charged particles as an example, and taking the black charged particles B as negatively charged, the white charged particles W as positively charged, and the red charged particles R as positively charged as an example.

[0054] For example, the charge-to-mass ratio of the white charged particles W can be made greater than the charge-to-mass ratio of the red charged particles R. Moreover, since the white charged particles W and the red charged particles R have the same electrical properties, and the charge-to-mass ratio of the white charged particles W is greater than the charge-to-mass ratio of the red charged particles R, when a voltage is applied to the common electrode 12 and the pixel electrode 11 to generate an electric field, the movement speed of the white charged particles W is greater than the movement speed of the red charged particles R. Moreover, since the charge-to-mass ratio of the white charged particles W is greater than the charge-to-mass ratio of the red charged particles R, when the electric field generated by applying a voltage to the common electrode 12 and the pixel electrode 11 can drive the red charged particles R to move, it cannot drive the white charged particles to move. Of course, other methods can also be used to drive the white charged particles W and the red charged particles R separately, which are not limited here.

[0055] It should be noted that black charged particles can be used to achieve black state display, white charged particles can be used to achieve white state display, and colored charged particles can be used to achieve colored state display. Different grayscale displays can be achieved by the degree of aggregation of black charged particles, white charged particles and colored charged particles at the top and side of the electrophoretic liquid layer. The top of the electrophoretic liquid layer refers to the part of the electrophoretic liquid layer close to the common electrode side, and the bottom of the electrophoretic liquid layer refers to the part of the electrophoretic liquid layer close to the pixel electrode side. For example, the more black charged particles there are at the top of the electrophoretic liquid layer, the lower the brightness of the pixel, and the more white charged particles there are at the top, the higher the brightness of the pixel. In addition, white charged particles also have a scattering effect. In a pixel, the more white charged particles there are relative to the black charged particles, the stronger its reflection effect, and the fewer white charged particles there are relative to the black charged particles, the stronger its scattering effect.

[0056] In some embodiments of the present disclosure, Figure 1 As shown, the display panel further includes: a second base substrate 20 located on a side of the common electrode 6 away from the first base substrate 1 .

[0057] In a specific implementation, for example, a pixel electrode can be formed on a first base substrate to obtain a first substrate; a common electrode can be formed on a second base substrate to obtain a second substrate; an electrophoretic liquid layer can be formed on one side of the first substrate, and then a vacuum box-matching process can be used to cover the second substrate with the electrophoretic liquid layer to obtain the structure of the display panel provided in the embodiment of the present disclosure.

[0058] In a specific implementation, the common electrodes of different pixels are loaded with the same common electrode voltage, and by controlling the voltage loaded on the sub-electrodes, each pixel can present the desired grayscale. Accordingly, in some embodiments, the common electrodes of multiple pixels can be connected as a whole, that is, the common electrode is a planar electrode provided on the entire surface of one side of the second substrate. In a specific implementation, the common electrode is, for example, a transparent electrode, and the material of the common electrode includes indium tin oxide (ITO).

[0059] In the display panel provided by the embodiments of the present disclosure, the pixel electrode includes a plurality of sub-electrodes spaced apart from each other. Since the plurality of sub-electrodes are spaced apart from each other, the voltages of the driving voltage signals provided to the plurality of sub-electrodes may be different. This not only generates a first electric field in a vertical direction (i.e., perpendicular to the first substrate) between the sub-electrodes and the common electrode, but also generates a second electric field between the sub-electrodes with an angle greater than 0 with respect to the vertical direction. This achieves bidirectional control of charged particles in the vertical and lateral directions, thereby changing the aggregation state of the charged particles and adjusting the grayscale. Compared to driving the movement of charged particles by a vertical electric field, the embodiments of the present disclosure can shorten the migration distance of the charged particles and reduce the refresh time.

[0060] It should be noted that in related art, traditional capsule electrophoretic display panels require sufficient distance for charged particles to migrate in the longitudinal direction (perpendicular to the first substrate), and the distance between the pixel electrode and the common electrode is typically 100 microns. The display panel provided by the disclosed embodiments utilizes sub-electrodes to generate a transverse electric field that drives the movement of charged particles to adjust the grayscale. As a result, the distance between the sub-electrodes and the common electrode in the direction perpendicular to the first substrate is much smaller than the distance between the pixel electrode and the common electrode in traditional electrophoretic display panels. This can shorten refresh time and reduce the thickness of the display panel.

[0061] In some embodiments of the present disclosure, in the arrangement direction of the sub-electrodes, the distance between two adjacent sub-electrodes may be, for example, 4 micrometers to 50 micrometers, and the width of the sub-electrode may be, for example, 2 micrometers to 20 micrometers.

[0062] For example, regardless of the shape of the sub-electrodes included in the pixel electrode, the width and thickness of the multiple sub-electrodes can be the same. The distance between the sub-electrodes can be set based on the pixel size, the number of sub-electrodes, and their width. The distance between any two adjacent sub-electrodes in the multiple sub-electrodes is the same. For example, in the direction in which the multiple sub-electrodes are arranged, the width of the pixel is 56 microns; in a direction perpendicular to the first substrate, the distance between the pixel electrode and the common electrode is 7 microns; the thickness of each sub-electrode is 0.07 microns; and in the direction in which the multiple sub-electrodes are arranged, the width of the sub-electrodes is 4 microns.

[0063] In some disclosed embodiments, Figure 1 As shown, the display panel further includes: a reflective layer 15, located on a plurality of sub-electrodes (eg Figure 1 The reflective layer can reflect light after reaching the reflective layer, thereby increasing the reflectivity and improving the display brightness of the display panel.

[0064] The conventional driving method for electronic paper display panels consists of three stages: erasing the original image, activating particles, and writing a new grayscale. However, each stage requires hundreds of milliseconds, resulting in a driving time of approximately 500ms. This results in a prolonged response time for the electronic paper display panel, resulting in a slow response speed.

[0065] Furthermore, in the prior art, during the particle activation stage, a driving voltage signal that switches back and forth needs to be applied to the pixel electrode. Since the switching frequency of the driving voltage signal is low, the electronic paper display panel may flicker, resulting in poor image display quality.

[0066] Therefore, based on the above problems, the present disclosure provides the following solutions.

[0067] The driving method of the display panel provided by the embodiment of the present disclosure is as follows: Figure 2 Shown, including:

[0068] S100 , in a picture display stage, applying a driving voltage signal to a plurality of sub-electrodes in a set pixel in a sequential order at least once, so that the set pixel is converted from a first state to a second state.

[0069] The present disclosure applies driving voltage signals to a plurality of sub-electrodes in a set pixel at least once in a sequential order during the picture display stage, so that the set pixel is converted from a first state to a second state, thereby avoiding flickering of the electronic paper display panel and causing poor picture display quality.

[0070] Furthermore, the present disclosure saves the time required for activating particles, that is, during the image display phase, the work of activating particles is also completed.

[0071] In the prior art, multiple dithering processes based on sub-electrode voltage switching are required to activate the charged particles, resulting in flickering on the screen. In the disclosed embodiments, by applying driving voltage signals to multiple sub-electrodes in a given pixel at least once in a sequential manner, bidirectional control of the charged particles in both the vertical and horizontal directions is achieved, changing the aggregation state of the charged particles. This can reduce the number of sub-electrode voltage switching cycles during the driving process, reduce or even eliminate the number of dithering cycles, and thus reduce flicker.

[0072] For example, during the image display phase, the process of sequentially applying a driving voltage signal to the plurality of sub-electrodes in a set pixel may be performed once, thereby transitioning the set pixel from the first state to the second state. Alternatively, the process of sequentially applying a driving voltage signal to the plurality of sub-electrodes in the set pixel may be performed twice, thereby transitioning the set pixel from the first state to the second state.

[0073] Exemplarily, the set pixel may be one or more pixels among the plurality of pixels. For example, the set pixel may be one pixel, two pixels, three pixels or more pixels among the plurality of pixels, which is not limited here.

[0074] In some embodiments of the present disclosure, Figure 2 As shown, before the picture display stage, it also includes: step S200, a reverse stage; in the reverse stage, a reverse voltage signal is applied to multiple sub-electrodes in a set pixel.

[0075] Exemplarily, if the second state is black, then in the reverse phase, the voltage of the reverse voltage signal applied to the plurality of sub-electrodes in the set pixel is VF1, that is, the voltage of the reverse voltage signal corresponding to the black charged particles is VF1. If the second state is white, then in the reverse phase, the voltage of the reverse voltage signal applied to the plurality of sub-electrodes in the set pixel is VF2, that is, the voltage of the reverse voltage signal corresponding to the white charged particles is VF2. If the second state is red, then in the reverse phase, the voltage of the reverse voltage signal applied to the plurality of sub-electrodes in the set pixel is VF3, that is, the voltage of the reverse voltage signal corresponding to the red charged particles is VF3. Among them, the sizes of VF1, VF2, and VF3 are different.

[0076] For example, VF1 can be a positive voltage, VF2 can be a negative voltage, and VF3 can be a negative voltage. Of course, VF1, VF2, and VF3 can also be other voltages, which are not limited here.

[0077] In some embodiments of the present disclosure, the plurality of sub-electrodes include a first sub-electrode to an Nth sub-electrode sequentially arranged along a row direction of pixels, where N is an integer and N≥2;

[0078] Loading driving voltage signals to the plurality of sub-electrodes in the set pixel in sequence includes: loading driving voltage signals to the plurality of sub-electrodes in the set pixel in sequence from the first sub-electrode to the Nth sub-electrode.

[0079] For example, the following description will be made by taking the case where each pixel includes four sub-electrodes as an example. Figure 3 As shown, the plurality of sub-electrodes include a first sub-electrode 11-1, a second sub-electrode 11-2, a third sub-electrode 11-3, and a fourth sub-electrode 11-4, which are sequentially arranged along the row direction of the pixels. A driving voltage signal is applied sequentially to the first sub-electrode 11-1, the second sub-electrode 11-2, the third sub-electrode 11-3, and the fourth sub-electrode 11-4 in a given pixel.

[0080] In some embodiments of the present disclosure, driving voltage signals are loaded on multiple sub-electrodes in a set pixel in a sequence from the first sub-electrode to the Nth sub-electrode, including: loading driving voltage signals on multiple sub-electrodes in a set pixel in a sequence from the first sub-electrode to the Nth sub-electrode according to a set time interval.

[0081] For example, Figure 3 As shown, according to the set time interval, the driving voltage signal is loaded sequentially on the first sub-electrode 11-1, the second sub-electrode 11-2, the third sub-electrode 11-3, and the fourth sub-electrode 11-4 in the set pixel.

[0082] For example, the time interval may be set based on actual application requirements and is not limited here.

[0083] In some embodiments of the present disclosure, applying a driving voltage signal to multiple sub-electrodes in a set pixel includes: the voltage of the driving voltage signal applied to the multiple sub-electrodes in the set pixel can be sequentially reduced or increased in order from the first sub-electrode to the Nth sub-electrode. For example, Figure 3 As shown, the voltages of the driving voltage signals sequentially loaded on the first sub-electrode 11-1, the second sub-electrode 11-2, the third sub-electrode 11-3, and the fourth sub-electrode 11-4 in the set pixel decrease or increase in sequence.

[0084] In some embodiments of the present disclosure, when driving voltage signals are applied to multiple pixel sub-electrodes in a set pixel in sequence at one time during the image display phase, the driving voltage signals applied to the n-th sub-electrodes in different pixels have the same voltage. For example, Figure 3 As shown, the voltage of the driving voltage signal applied to the first sub-electrode 11-1 in pixel 1-11, the first sub-electrode 11-1 in pixel 1-12, the first sub-electrode 11-1 in pixel 1-21, and the first sub-electrode 11-1 in pixel 1-22 is the same. The voltage of the driving voltage signal applied to the second sub-electrode 11-2 in pixel 1-11, the second sub-electrode 11-2 in pixel 1-12, the second sub-electrode 11-2 in pixel 1-21, and the second sub-electrode 11-2 in pixel 1-22 is the same. The voltage of the driving voltage signal applied to the third sub-electrode 11-3 in pixel 1-11, the third sub-electrode 11-3 in pixel 1-12, the third sub-electrode 11-3 in pixel 1-21, and the third sub-electrode 11-3 in pixel 1-22 is the same. The fourth sub-electrode 11-4 in the pixel 1-11, the fourth sub-electrode 11-4 in the pixel 1-12, the fourth sub-electrode 11-4 in the pixel 1-21, and the fourth sub-electrode 11-4 in the pixel 1-22 are loaded with the same driving voltage signal.

[0085] In some embodiments of the present disclosure, Figure 3 As shown, each of the multiple pixels further includes: multiple conduction control circuits 30 and multiple data lines DA; wherein, one of the multiple conduction control circuits 30 in the same pixel is connected to multiple sub-electrodes (eg Figure 3 A column of pixels corresponds to a plurality of data lines DA, and a conduction control circuit 30 in a plurality of conduction control circuits 30 in the same pixel is coupled to a data line DA in the corresponding plurality of data lines DA; wherein the conduction control circuit 30 is configured to provide a driving voltage signal loaded on the coupled data line DA to the coupled sub-electrode (e.g., Figure 3 11-1, 11-2, 11-3, 11-4).

[0086] In some embodiments of the present disclosure, Figure 3 As shown, the display panel further includes: a plurality of scan lines GA; wherein a row of pixels corresponds to one of the plurality of scan lines GA, and the scan signal terminals CS of the plurality of conduction control circuits 30 in a row of pixels are coupled to the corresponding scan line GA.

[0087] In some embodiments of the present disclosure, Figure 3 As shown, the conduction control circuit 30 includes: a conduction control transistor M1; wherein the gate of the conduction control transistor M1 is coupled to the scan signal terminal CS, the first electrode of the conduction control transistor M1 is coupled to the corresponding data line DA, and the second electrode of the conduction control transistor M1 is coupled to the corresponding sub-electrode (for example Figure 3 11-1, 11-2, 11-3, 11-4) are coupled.

[0088] Exemplarily, the conduction control transistor M1 can be turned on under the control of the effective level of the scanning signal transmitted by the scanning signal terminal CS, and can be turned off under the control of the ineffective level of the scanning signal. Exemplarily, the conduction control transistor M1 is set as a P-type transistor, then the effective level of the scanning signal is a low level, and the ineffective level of the scanning signal is a high level. Alternatively, the conduction control transistor M1 is set as an N-type transistor, then the effective level of the scanning signal is a high level, and the ineffective level of the scanning signal is a low level. Exemplarily, the first electrode of the above-mentioned transistor can be its source, and the second electrode can be its drain. Alternatively, the first electrode is its drain, and the second electrode is its source. This is not limited here.

[0089] For example, Figure 4 As shown, the conduction control transistor M1 includes: an active layer 40, a gate G, a source S and a drain D; and the sub-electrode is electrically connected to the drain of the conduction control transistor. Figure 4 The conduction control transistor M1 shown is a top gate structure, that is, the gate G is located between the active layer 40 and the source S and drain D. Figure 4 As shown, the display panel further includes: a buffer layer 42 located between the active layer 40 and the first base substrate 10, a gate insulating layer 43 located between the gate G and the active layer 40, an interlayer insulating layer 44 located between the gate G and the source S, a passivation layer 45 located between the source S and the sub-electrode 8, and a planarization layer 46 located between the passivation layer 45 and the sub-electrode 11. Of course, in a specific implementation, the conduction control transistor can also be a bottom gate structure. In a specific implementation, the material of the active layer of the conduction control transistor can be amorphous silicon (a-Si) or an oxide semiconductor or polysilicon, and accordingly, the preparation process of the conduction control transistor can adopt an a-Si process or an oxide semiconductor process or a low-temperature polysilicon process.

[0090] For example, the following description will be made by taking the colored charged particles as red charged particles, the black charged particles as negatively charged, the white charged particles as positively charged, and the red charged particles as positively charged as an example.

[0091] like Figure 5 As shown, cs represents the signal of the scanning signal terminal CS, daw represents the driving voltage signal of the electronic paper display panel displaying a white picture, daw represents the driving voltage signal of the electronic paper display panel displaying a black picture, and dar represents the driving voltage signal of the electronic paper display panel displaying a red picture.

[0092] For example, Figure 3 and Figure 6 As shown, the following will take the colored charged particles as red charged particles, the black charged particles as negatively charged, the white charged particles as positively charged, and the red charged particles as positively charged as an example; and take the first state as red and the second state as white as an example for explanation.

[0093] In the reverse phase, the conduction control transistor M1 in the pixel is turned on by the high level signal of the scanning signal terminal CS, and the reverse voltage signal loaded on the corresponding coupled data line DA is provided to the coupled sub-electrode (for example Figure 3 11-1, 11-2, 11-3, 11-4), wherein the voltage of the reverse voltage signal is VF3, thereby moving the red charged particles R in the set pixel away from the common electrode 12 under the action of the electric field, so that the set pixel no longer displays red.

[0094] In the picture display stage, the conduction control transistor M1 in the pixel is set to be turned on under the action of the high-level signal of the scanning signal terminal CS, and the driving voltage signal with the voltage V1 loaded on the corresponding coupled data line DA is provided to the coupled first sub-electrode 11-1; the conduction control transistor M1 in the pixel is set to be turned on under the action of the high-level signal of the scanning signal terminal CS, and the driving voltage signal with the voltage V2 loaded on the corresponding coupled data line DA is provided to the coupled second sub-electrode 11-2; the conduction control transistor M1 in the pixel is set to be turned on under the action of the high-level signal of the scanning signal terminal CS, and the driving voltage signal with the voltage V3 loaded on the corresponding coupled data line DA is provided to the coupled third sub-electrode 11-3; the conduction control transistor M1 in the pixel is set to be turned on under the action of the high-level signal of the scanning signal terminal CS, and the driving voltage signal with the voltage V4 loaded on the corresponding coupled data line DA is provided to the coupled fourth sub-electrode 11-4; wherein, V1<V2<V3<V4. Thus, a transverse electric field is generated between the sub-electrodes 11-1, 11-2, 11-3, and 11-4, and a longitudinal electric field is generated between the pixel electrode 11 and the common electrode 12. Under the action of the transverse and longitudinal electric fields, the white charged particles W in the pixel move toward the common electrode 12 and also move in a direction parallel to the first base substrate 10, gradually becoming flat. Figure 6 As shown, at this time, the pixel is set to display white.

[0095] For example, Figure 3 and Figure 7 As shown, the following will take the colored charged particles as red charged particles, the black charged particles as negatively charged, the white charged particles as positively charged, and the red charged particles as positively charged as an example; and take the first state as white and the second state as black as an example for explanation.

[0096] In the reverse phase, the conduction control transistor M1 in the pixel is turned on by the high level signal of the scanning signal terminal CS, and the reverse voltage signal loaded on the corresponding coupled data line DA is provided to the coupled sub-electrode (for example Figure 3 11-1, 11-2, 11-3, 11-4), wherein the voltage of the reverse voltage signal is VF2, thereby moving the white charged particles W in the set pixel away from the common electrode 12 under the action of the electric field, so that the set pixel no longer displays white.

[0097] In the picture display stage, the conduction control transistor M1 in the pixel is set to be turned on under the action of the high-level signal of the scanning signal terminal CS, and the driving voltage signal with a voltage of V5 loaded on the corresponding coupled data line DA is provided to the coupled first sub-electrode 11-1; the conduction control transistor M1 in the pixel is set to be turned on under the action of the high-level signal of the scanning signal terminal CS, and the driving voltage signal with a voltage of V6 loaded on the corresponding coupled data line DA is provided to the coupled second sub-electrode 11-2; the conduction control transistor M1 in the pixel is set to be turned on under the action of the high-level signal of the scanning signal terminal CS, and the driving voltage signal with a voltage of V7 loaded on the corresponding coupled data line DA is provided to the coupled third sub-electrode 11-3; the conduction control transistor M1 in the pixel is set to be turned on under the action of the high-level signal of the scanning signal terminal CS, and the driving voltage signal with a voltage of V8 loaded on the corresponding coupled data line DA is provided to the coupled fourth sub-electrode 11-4; wherein, V5>V6>V7>V8. Thus, a transverse electric field is generated between the sub-electrodes 11-1, 11-2, 11-3, and 11-4, and a longitudinal electric field is generated between the pixel electrode 11 and the common electrode 12. Under the action of the transverse and longitudinal electric fields, the black charged particles B in the pixel move toward the common electrode 12 while also moving in a direction parallel to the first base substrate 10, gradually becoming flat. Figure 7 As shown, at this time, the pixel is set to display black.

[0098] In some other embodiments of the present disclosure, applying a driving voltage signal to the plurality of sub-electrodes in a set pixel includes: applying the driving voltage signal to the plurality of sub-electrodes in the set pixel with the same voltage.

[0099] For example, Figure 3 As shown, for a plurality of sub-electrodes (eg Figure 3 The voltages of the driving voltage signals loaded by 11-1, 11-2, 11-3, and 11-4) are the same.

[0100] It should be noted that although the voltage of the driving voltage signal applied to multiple sub-electrodes is the same, a transverse electric field will still be generated between the multiple sub-electrodes. Because there is a certain buffer time when the driving voltage is applied to the sub-electrodes, the voltage applied to the sub-electrodes gradually increases, so that a transverse electric field is still generated between the sub-electrodes for a certain period of time. For example, as shown in the figure, after the driving voltage signal with a voltage of V9 is applied to the first sub-electrode 11-1, a driving voltage signal with a voltage of V9 is applied to the second sub-electrode 11-2. Since there is a certain buffer time when the driving voltage signal with a voltage of V9 is applied to the second sub-electrode 11-2, a transverse electric field will still be generated between the first sub-electrode 11-1 and the second sub-electrode 11-2 for a certain period of time.

[0101] For example, Figure 3 and Figure 8 As shown, the following will take the colored charged particles as red charged particles, the black charged particles as negatively charged, the white charged particles as positively charged, and the red charged particles as positively charged as an example; and take the first state as black and the second state as red as an example for explanation.

[0102] In the reverse phase, the conduction control transistor M1 in the pixel is turned on by the high level signal of the scanning signal terminal CS, and the reverse voltage signal loaded on the corresponding coupled data line DA is provided to the coupled sub-electrode (for example Figure 3 11-1, 11-2, 11-3, 11-4), wherein the voltage of the reverse voltage signal is VF1, thereby moving the black charged particles W in the set pixel away from the common electrode 12 under the action of the electric field, so that the set pixel no longer displays black.

[0103] In the image display stage, the conduction control transistor M1 in the pixel is set to be turned on under the action of the high-level signal of the scanning signal terminal CS, and the driving voltage signal of the voltage V9 loaded on the corresponding coupled data line DA is provided to the coupled first sub-electrode 11-1, the second sub-electrode 11-2, the third sub-electrode 11-3, and the fourth sub-electrode 11-4; a transverse electric field is generated between the sub-electrodes 11-1, 11-2, 11-3, and 11-4 in sequence, and a longitudinal electric field is generated between the pixel electrode 11 and the common electrode 12. Under the action of the transverse electric field and the longitudinal electric field, the red charged particles R in the pixel are set to move in the direction close to the common electrode 12, and also move in the direction parallel to the first base substrate 10, and gradually become flat. Figure 8 As shown, at this time, the pixel is set to display red.

[0104] Based on the same disclosed concept, an embodiment of the present disclosure provides a driving device for a display panel, wherein the display panel includes: a plurality of pixels; each of the plurality of pixels includes: a pixel electrode, the pixel electrode including a plurality of sub-electrodes spaced apart from each other; the driving device is configured to load a driving voltage signal to the plurality of sub-electrodes in a set pixel in a sequential order at least once during a picture display stage, so that the set pixel is converted from a first state to a second state.

[0105] Based on the same disclosed concept, the display device provided in the embodiments of the present disclosure includes a display panel and the aforementioned display panel driving device. The principles for solving the problem solved by this display device are similar to those of the aforementioned display panel and display panel driving device. Therefore, the implementation of this display device can refer to the implementation of the aforementioned display panel and display panel driving device, and the repeated parts will not be repeated here.

[0106] In the embodiment of the present disclosure, the display panel is an electronic paper display panel; the display panel also includes a first base substrate; each of the multiple pixels also includes: a common electrode and an electrophoretic liquid layer, the common electrode is located on the side of the pixel electrode away from the first base substrate, and the electrophoretic liquid layer is located between the pixel electrode and the common electrode; the electrophoretic liquid layer includes black charged particles, white charged particles and at least one color charged particles, and the voltages of the driving voltage signals corresponding to the black charged particles, the white charged particles and the color charged particles are different.

[0107] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present disclosure.

[0108] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present disclosure without departing from the spirit and scope of the embodiments of the present disclosure. Thus, if such changes and modifications of the embodiments of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include such changes and modifications.

Claims

1. A method for driving a display panel, characterized in that: The display panel includes: a plurality of pixels; each of the plurality of pixels includes: a pixel electrode, the pixel electrode including a plurality of sub-electrodes spaced apart from each other; The driving method includes: During the image display phase, applying a driving voltage signal to a plurality of sub-electrodes in a set pixel in a sequential order at least once, so that the set pixel is switched from a first state to a second state; Before the picture display stage, the process further includes: a reverse stage; In the reverse phase, applying a reverse voltage signal to the plurality of sub-electrodes in the set pixel; The display panel is an electronic paper display panel; the display panel further includes a first base substrate; each of the plurality of pixels further includes: a common electrode and an electrophoretic liquid layer, the common electrode being located on a side of the pixel electrode facing away from the first base substrate, and the electrophoretic liquid layer being located between the pixel electrode and the common electrode; The electrophoretic liquid layer includes black charged particles, white charged particles and at least one color charged particle, and the black charged particles, the white charged particles and the color charged particles correspond to driving voltage signals of different voltages; The reverse voltage signals corresponding to the black charged particles, the white charged particles, and the colored charged particles have different voltages.

2. The method for driving a display panel according to claim 1, wherein: The plurality of sub-electrodes include a first sub-electrode to an Nth sub-electrode sequentially arranged along a row direction of the pixels, where N is an integer and N≥2; The applying driving voltage signals to the plurality of sub-electrodes in the set pixel in sequence includes: A driving voltage signal is applied to the plurality of sub-electrodes in the set pixel in a sequence from the first sub-electrode to the Nth sub-electrode.

3. The method for driving a display panel according to claim 2, wherein: The step of applying a driving voltage signal to the plurality of sub-electrodes in the set pixel in a sequence from the first sub-electrode to the Nth sub-electrode includes: According to a set time interval, a driving voltage signal is applied to the plurality of sub-electrodes in the set pixel in a sequence from the first sub-electrode to the Nth sub-electrode.

4. The method for driving a display panel according to claim 2, wherein: The applying a driving voltage signal to the plurality of sub-electrodes in the set pixel includes: The voltages of the driving voltage signals applied to the plurality of sub-electrodes in the set pixel are sequentially decreased or increased in order from the first sub-electrode to the Nth sub-electrode.

5. The method for driving a display panel according to claim 4, wherein: When driving voltage signals are loaded onto a plurality of pixel sub-electrodes in the set pixel in sequence at one time during the picture display phase, the driving voltage signals loaded onto n-th sub-electrodes in different pixels have the same voltage.

6. The method for driving a display panel according to claim 2, wherein: The applying a driving voltage signal to the plurality of sub-electrodes in the set pixel includes: The voltage of the driving voltage signal applied to the plurality of sub-electrodes in the set pixel is the same.

7. The method for driving a display panel according to any one of claims 1 to 6, wherein: Each of the plurality of pixels further comprises: a plurality of conduction control circuits and a plurality of data lines; One of the conduction control circuits in the same pixel is coupled to a sub-electrode in the sub-electrodes; A column of pixels corresponds to a plurality of data lines, and one of the plurality of conduction control circuits in the same pixel is coupled to a corresponding one of the plurality of data lines; The conduction control circuit is configured to provide the driving voltage signal loaded on the coupled data line to the coupled sub-electrode under the control of the signal at the scan signal terminal.

8. The method for driving a display panel according to claim 7, wherein: The display panel further includes: a plurality of scan lines; A row of pixels corresponds to one of the plurality of scan lines, and scan signal terminals of a plurality of conduction control circuits in the row of pixels are coupled to the corresponding scan line.

9. The method for driving a display panel according to claim 7, wherein: The conduction control circuit includes: a conduction control transistor; The gate of the conduction control transistor is coupled to the scan signal terminal, the first electrode of the conduction control transistor is coupled to the corresponding data line, and the second electrode of the conduction control transistor is coupled to the corresponding sub-electrode.

10. A driving device for a display panel, characterized in that: The display panel includes: a plurality of pixels; each of the plurality of pixels includes: a pixel electrode, the pixel electrode including a plurality of sub-electrodes spaced apart from each other; The driving device is configured to load a reverse voltage signal to the multiple sub-electrodes in the set pixel in a reverse phase before the picture display phase; and in the picture display phase, load a driving voltage signal to the multiple sub-electrodes in the set pixel in a sequential order at least once to convert the set pixel from a first state to a second state.

11. A display device, characterized in that: comprising a display panel and a driving device for the display panel as claimed in claim 10; The display panel is an electronic paper display panel; the display panel further comprises a first base substrate; Each of the plurality of pixels further comprises: a common electrode and an electrophoretic liquid layer, wherein the common electrode is located on a side of the pixel electrode facing away from the first substrate, and the electrophoretic liquid layer is located between the pixel electrode and the common electrode; The electrophoretic liquid layer includes black charged particles, white charged particles and at least one color charged particle, and the black charged particles, the white charged particles and the color charged particles correspond to driving voltage signals of different voltages; The reverse voltage signals corresponding to the black charged particles, the white charged particles, and the colored charged particles have different voltages.

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