Electrophoretic display panel and display device

Abstract

The invention provides an electrophoretic display panel and a display device. The electrophoretic display panel comprises a first substrate and electrophoretic particles, the scanning lines, the data lines and the pixels are located on the same side, facing the electrophoretic particles, of the first substrate, the scanning lines are configured to transmit scanning signals to the pixels, the data lines are configured to transmit data signals to the pixels, and the data signals comprise a plurality of unit periods; a driving stage of the electrophoretic display panel comprises a writing stage, in the writing stage, a data signal comprises a driving signal and at least one adjusting signal, the adjusting signal is inserted into the driving signal, and the driving signal is divided into at least two sub-driving signals; the voltage of at least one sub-driving signal is different from the voltage of the adjusting signal in one unit time period. Therefore, the display brightness change can be adjusted slightly through the adjusting signal, so that the purpose of finely adjusting the brightness is achieved. By setting the adjusting signal, the display brightness of the pixel is accurately controlled, so that the target brightness is achieved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to an electrophoretic display panel and a display device. Background Art

[0002] Electronic paper (E-Paper) is a display screen that forms pixel graphics by coating electronic ink on a thin film and attaching it to a thin film transistor circuit. Among them, electronic paper has the advantages of energy saving, eye protection, and the ability to maintain display even after power failure. It can imitate the visual perception of printing and writing on paper. Its principle is to use the electrophoresis of charged particles, that is, two oppositely charged particles move to the two poles of the display under the drive of the electric field, so that one side of the transparent electrode displays the color of one charged particle.

[0003] At present, pulse width modulation (PWM) is usually used to drive charged particles. However, for PWM drive, the achievable brightness level is n=t / (1 / f), where t is the response time and f is the driving frequency. The response time is related to the characteristics of the material, and the driving frequency is limited by the charging state of the pixel, so the brightness level is not enough to achieve accurate grayscale. In other words, the required target grayscale cannot be achieved by simply changing the driving time. The number of brightness levels that PWM can distinguish is insufficient and cannot support accurate adjustment of grayscale. Summary of the invention

[0004] Based on the above problems, the present invention provides an electrophoretic display panel and a display device, which can achieve a more precise brightness adjustment by adjusting the display brightness change by adjusting the signal. By setting the adjustment signal, the display brightness of the pixel can be accurately controlled to achieve the target brightness.

[0005] In a first aspect, an embodiment of the present invention provides an electrophoretic display panel, comprising:

[0006] a first substrate and electrophoretic particles;

[0007] A scan line, a data line and a pixel are located on the same side of the first substrate facing the electrophoretic particles, the scan line is configured to transmit a scan signal to the pixel, the data line is configured to transmit a data signal to the pixel, and the data signal includes a plurality of unit time periods;

[0008] The driving stage of the electrophoretic display panel includes a writing stage. In the writing stage, the data signal includes a driving signal and at least one adjustment signal. The adjustment signal is inserted into the driving signal to divide the driving signal into at least two sub-driving signals; wherein a voltage of at least one of the sub-driving signals is different from a voltage of the adjustment signal within one of the unit time periods.

[0009] Based on the same inventive concept, in a second aspect, an embodiment of the present invention provides a display device, comprising the electrophoretic display panel described in the first aspect.

[0010] In the electrophoretic display panel provided by the embodiment of the present invention, at least one adjustment signal is inserted into the drive signal in the writing phase, and the voltage of at least one sub-drive signal is different from the voltage of the adjustment signal in a unit period, so that a small amount of adjustment of the display brightness change is brought about by the adjustment signal, thereby achieving the purpose of more precise brightness adjustment. By setting the adjustment signal, the display brightness of the pixel is accurately controlled to achieve the target brightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of a top view of an electrophoretic display panel provided by an embodiment of the present invention;

[0012] Figure 2 A schematic cross-sectional structure diagram of an electrophoretic display panel provided by an embodiment of the present invention;

[0013] Figure 3 A driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention;

[0014] Figure 4 A driving timing diagram of another electrophoretic display panel provided by an embodiment of the present invention;

[0015] Figure 5 A driving timing diagram of another electrophoretic display panel provided by an embodiment of the present invention;

[0016] Figure 6 A driving timing diagram of another electrophoretic display panel provided by an embodiment of the present invention;

[0017] Figure 7 A driving timing diagram of another electrophoretic display panel provided by an embodiment of the present invention;

[0018] Figure 8 A driving timing diagram of another electrophoretic display panel provided by an embodiment of the present invention;

[0019] Fig. 9 A driving timing diagram of another electrophoretic display panel provided by an embodiment of the present invention;

[0020] Fig.10 A driving timing diagram of another electrophoretic display panel provided by an embodiment of the present invention;

[0021] Fig.11 A driving timing diagram of another electrophoretic display panel provided by an embodiment of the present invention;

[0022] Fig.12 A driving timing diagram of another electrophoretic display panel provided by an embodiment of the present invention;

[0023] Fig.13 A driving timing diagram of another electrophoretic display panel provided by an embodiment of the present invention;

[0024] Fig.14 A driving timing diagram of an adjustment signal provided by an embodiment of the present invention;

[0025] Fig.15 Another driving timing diagram of an adjustment signal provided by an embodiment of the present invention;

[0026] Fig.16 Another driving timing diagram of an adjustment signal provided by an embodiment of the present invention;

[0027] Fig.17 Another driving timing diagram of an adjustment signal provided by an embodiment of the present invention;

[0028] Fig.18 Another driving timing diagram of an adjustment signal provided by an embodiment of the present invention;

[0029] Fig.19 Another driving timing diagram of an adjustment signal provided by an embodiment of the present invention;

[0030] Fig. 20 A driving timing diagram of another electrophoretic display panel provided by an embodiment of the present invention;

[0031] Fig.21 A driving timing diagram of another electrophoretic display panel provided by an embodiment of the present invention;

[0032] Fig. 22 A driving timing diagram of another electrophoretic display panel provided by an embodiment of the present invention;

[0033] Fig.23 A schematic diagram of a top view of a display device provided by an embodiment of the present invention;

[0034] Fig.24 A driving timing diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] Figure 1A schematic diagram of a top view of an electrophoretic display panel provided by an embodiment of the present invention, Figure 2 A schematic cross-sectional view of an electrophoretic display panel provided by an embodiment of the present invention, referring to Figure 1 and Figure 2 An electrophoretic display panel provided by an embodiment of the present invention includes a first substrate 11 and an electrophoretic particle 13, and the electrophoretic particle 13 is located on one side of the first substrate 11. The electrophoretic display panel includes a scan line 21, a data line 22, and a pixel 23, and the scan line 21, the data line 22, and the pixel 23 are located on the same side of the first substrate 11 facing the electrophoretic particle 13. That is, the scan line 21, the data line 22, and the pixel 23 are arranged on the first substrate 11, and the electrophoretic particle 13 is arranged on the side where the scan line 21, the data line 22, and the pixel 23 are arranged. A plurality of scan lines 21 extend along a first direction X and are arranged along a second direction Y, and a plurality of data lines 22 extend along the second direction Y and are arranged along the first direction X. The first direction X intersects with the second direction Y. The scan line 21 is configured to transmit a scan signal to the pixel 23, and the scan signal is a signal for controlling the thin film transistor 20 to be turned on. The data line 22 is configured to transmit a data signal to the pixel 23, and when the thin film transistor 20 is turned on, the data signal is written into the pixel 23. By writing different data signals to different pixels 23 , the electrophoretic display panel can display a specific image.

[0037] Figure 3 A driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention, Figure 4 Another driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention is shown in FIG. Figure 3 and Figure 4 , the data signal includes a plurality of unit periods P0. The duration of the enable level of the data signal is an integer multiple of the unit period P0. In one embodiment, the duration of the unit period P0 is the duration of the scanning frame. Figure 1 In one scanning frame, the first scanning line 21 to the last scanning line 21 are scanned line by line.

[0038] refer to Figure 1 and Figure 4 The driving phase of the electrophoretic display panel includes a writing phase P1. In the writing phase P1, different data signals are provided to different pixels 23, so that different pixels 23 can have different display brightness and different pixels 23 can have different grayscales.

[0039] like Figure 3As shown, if the data signal in the writing phase includes the first drive signal D1, the duration of the first drive signal D1 is t1, and the brightness of the pixel driven by the first drive signal D1 is L1. If the data signal in the writing phase includes the second drive signal D2, the duration of the second drive signal D2 is t2, and the brightness of the pixel driven by the second drive signal D2 is L2. The target brightness of the electrophoretic display panel is Ln, L1<Ln<L2. t2>t1, t2-t1=P0. If only the first drive signal D1 or the second drive signal D2 is used, it is impossible to accurately control the display brightness of the pixel and the target brightness cannot be achieved.

[0040] like Figure 3 and Figure 4 As shown, in the writing phase P1, the data signal includes a driving signal Ga and at least one adjustment signal Gb. The adjustment signal Gb is inserted into the driving signal Ga to divide the driving signal Ga into at least two sub-driving signals Gc. In other words, the driving signal Ga includes at least two sub-driving signals Gc, and the adjustment signal Gb is located between the two sub-driving signals Gc. Among them, the voltage of at least one sub-driving signal Gc is different from the voltage of the adjustment signal Gb in a unit period P0.

[0041] For example, in Figure 3 and Figure 4 In the example, the data signal includes an adjustment signal Gb, the adjustment signal Gb is inserted into the driving signal Ga, the driving signal Ga is divided into two sub-driving signals Gc, and the adjustment signal Gb is located between the two sub-driving signals Gc. The voltage of the sub-driving signal Gc is +V0, and the voltage of the adjustment signal Gb in a unit period P0 is 0. Among them, V0 is greater than 0.

[0042] In the electrophoretic display panel provided by the embodiment of the present invention, at least one adjustment signal Gb is inserted into the drive signal Ga in the writing phase P1, and the voltage of at least one sub-drive signal Gc is different from the voltage of the adjustment signal Gb in a unit period P0, so that a small amount of adjustment of the display brightness change is brought about by the adjustment signal Gb, thereby achieving the purpose of more precise brightness adjustment. By setting the adjustment signal Gb, the display brightness of the pixel is accurately controlled to achieve the target brightness.

[0043] For example, reference Figure 1 and Figure 2 The first substrate 11 includes a driving circuit layer ( Figure 1 and Figure 2The driving circuit layer includes a plurality of pixel circuits, and the pixel circuit may be 1T1C or 1T2C. In other embodiments, the pixel circuit may also be a circuit structure of 2T1C, 4T1C, 7T1C, 7T2C, 8T1C, 8T2C, etc., and the pixel circuit includes a plurality of thin film transistors (TFT), storage capacitors, and metal wiring, etc. The source or drain of at least one thin film transistor 20 is electrically connected to the pixel electrode of the pixel 23, and is used to provide a data signal to the pixel 23 to drive the electrophoretic particle 13 to move to the target position under the action of the electric field. The type of the pixel circuit in the embodiment of the present invention is not limited.

[0044] For example, reference Figure 1 and Figure 2 The electrophoretic display panel further includes a second substrate 12, the first substrate 11 and the second substrate 12 are arranged opposite to each other, and the electrophoretic particles 13 are located between the first substrate 11 and the second substrate 12. The electrophoretic particles 13 include black electrophoretic particles 132 and white electrophoretic particles 131. Under the action of the electric field, when the black electrophoretic particles 132 are located on the display side of the electrophoretic display panel (for example, the side of the second substrate 12 away from the first substrate 11), the light is absorbed by the black electrophoretic particles 132, so that less light is reflected to the human eye, and it appears as a dark area to the human eye, and the grayscale value is recorded as 0. When the white electrophoretic particles 131 are located on the display side of the electrophoretic display panel, the light is reflected by the white electrophoretic particles 131, so that more light is reflected to the human eye, and it appears as a bright area to the human eye, and the grayscale value is recorded as 255. When the black electrophoretic particles 132 and the white electrophoretic particles 131 are located between the second substrate 12 and the first substrate 11, part of the light is reflected and part of the light is absorbed, which appears as a gray area to the human eye, and the grayscale value is between 0 and 255. The embodiment of the present invention is explained with a dual-particle system, but is not limited thereto. In other embodiments, the electrophoretic particles 13 may also include a multi-particle system, which includes at least three types of electrophoretic particles.

[0045] For example, reference Figure 1 and Figure 2 , the scan line 21 is configured to transmit a scan signal, the scan signal includes a scan enable level and a scan disable level. In the period where the scan enable level is located, the data signal can be written to the pixel electrode ( Figure 1 and Figure 2 2. The data line 22 is configured to transmit a data signal, which includes a data enable level and a data disable level. The data enable level is a level that changes the electric field required to drive the electrophoretic particles 13 to move, and the data disable level is a level that does not generate the electric field required to drive the electrophoretic particles 13 to move.

[0046] Optionally, refer to Figure 1-Figure 4 In the writing phase P1, the difference between the brightness of the pixel 23 driven by the data signal and the brightness of the pixel driven by the driving signal Ga is the brightness difference, which is less than the brightness change value of the pixel 23 driven by the driving signal Ga in one unit period P0. The brightness change value of the pixel 23 driven by the driving signal Ga in one unit period P0 refers to the difference between the brightness of the pixel 23 at the end of the unit period P0 and the brightness of the pixel 23 at the start of the unit period P0.

[0047] For example, continue to refer to Figure 1 , Figure 3 and Figure 4 , in the writing phase P1, the brightness of the pixel driven by the driving signal Ga is L1. The brightness of the pixel 23 driven by the data signal is the sum of the brightness of the pixel driven by the driving signal Ga and the adjustment signal Gb, and the brightness of the pixel 23 driven by the data signal is Ln. The brightness difference is Ln-L1. The brightness change value of the pixel 23 driven by the driving signal Ga in a unit period P0 is a change value, and the brightness change value generated is different as the position of the unit period P0 in the data signal is different. However, no matter how the position of the unit period P0 in the data signal is, the brightness change value generated is greater than (Ln-L1).

[0048] In this way, a brightness change value smaller than one frame of driving signal can be introduced into the display brightness, and the display brightness L1 and the display brightness L2 can be finely adjusted to the target brightness Ln.

[0049] Figure 5 Another driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention is shown in FIG. Figure 1 , Figure 4 and Figure 5, the time interval between the start time of the adjustment signal Gb and the start time of the drive signal Ga is the first time interval S1, and the time interval between the end time of the adjustment signal Gb and the end time of the drive signal Ga is the second time interval S2. The first time interval S1 is greater than the second time interval S2. Wherein, when the drive signal Ga includes a sub-drive signal Gc, the start time of the drive signal Ga refers to the start time of the first sub-drive signal Gc in the drive signal Ga. The end time of the drive signal Ga refers to the end time of the last sub-drive signal Gc in the drive signal Ga. At the end position of the drive signal Ga, the accumulation degree of the electrophoretic particles 13 is relatively large, the accumulation has been completed or is close to completion, and the built-in electric field caused by the distribution of the electrophoretic particles 13 is relatively strong. In an embodiment of the present invention, the adjustment signal Gb is set in the second half of the drive signal Ga, and the release effect of the adjustment signal Gb on the built-in electric field is relatively large. Compared with setting the adjustment signal Gb in the first half of the drive signal Ga, a larger brightness change value can be brought to the electrophoretic display panel.

[0050] The built-in electric field (built-in field) refers to the electric field formed in a semiconductor or insulator due to internal effects, not an external electric field.

[0051] For example, reference Figure 4 and Figure 5 , the two sub-drive signals Gc in the drive signal Ga are the first sub-drive signal Ga1 and the second sub-drive signal Ga2. The first sub-drive signal Ga1 is located before the second sub-drive signal Ga2. The adjustment signal Gb is located between the first sub-drive signal Ga1 and the second sub-drive signal Ga2. The duration of the adjustment signal Gb is one unit period P0, and the voltage of the adjustment signal Gb in one unit period P0 is 0. The starting time of the drive signal Ga is the starting time of the first sub-drive signal Ga1. The time interval between the starting time of the adjustment signal Gb and the starting time of the first sub-drive signal Ga1 is the first time interval S1, and the first time interval S1 is equal to 11 P0. The end time of the drive signal Ga is the end time of the second sub-drive signal Ga2. The time interval between the end time of the adjustment signal Gb and the end time of the second sub-drive signal Ga2 is the second time interval S2, and the second time interval S2 is equal to 1 P0. The first time interval S1 is greater than the second time interval S2, that is, 11P0>PO.

[0052] Optionally, refer to Figure 4 and Figure 5, the time interval between the start time of the adjustment signal Gb and the start time of the driving signal Ga is the first time interval S1. The time interval between the start time of the driving signal Ga and the end time of the driving signal Ga is the third time interval S3. The first time interval S1 is greater than or equal to half of the third time interval S3. In the embodiment of the present invention, the adjustment signal Gb is set in the second half of the driving signal Ga, and the adjustment signal Gb has a greater effect on the release of the built-in electric field. Compared with setting the adjustment signal Gb in the first half of the driving signal Ga, a greater brightness change value can be brought to the electrophoretic display panel.

[0053] It should be noted that when comparing the first time interval S1 with half of the third time interval S3 , not only the size of the first time interval S1 and the second time interval S2 is involved, but also the duration of the adjustment signal Gb is involved.

[0054] For example, reference Figure 4 and Figure 5 , the starting moment of the driving signal Ga is the starting moment of the first sub-driving signal Ga1. The starting moment of the adjustment signal Gb is the ending moment of the first sub-driving signal Ga1. The time interval between the starting moment of the adjustment signal Gb and the starting moment of the first sub-driving signal Ga1 is the first time interval S1, and the first time interval S1 is equal to 11 P0. The ending moment of the adjustment signal Gb is the starting moment of the second sub-driving signal Ga2. The time interval between the ending moment of the adjustment signal Gb and the ending moment of the second sub-driving signal Ga2 is the second time interval S2, and the second time interval S2 is equal to 1 P0. The ending moment of the driving signal Ga is the ending moment of the second sub-driving signal Ga2. The time interval between the starting moment of the driving signal Ga and the ending moment of the driving signal Ga is the third time interval S3, and the third time interval S3 is equal to 13 P0. The first time interval S1 is greater than half of the third time interval S3, that is, 11P0>6.5P0.

[0055] Figure 6 Another driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention is shown in FIG. Figure 6 The time interval between the start time of the adjustment signal Gb and the start time of the driving signal Ga is the first time interval S1, and the time interval between the start time of the adjustment signal Gb and the end time of the driving signal Ga is the fourth time interval S4. The first time interval S1 is smaller than the fourth time interval S4.

[0056] For example, reference Figure 6, the duration of the adjustment signal Gb is greater than or equal to 2 unit periods P0, although the first time interval S1 is less than the fourth time interval S4, the first time interval S1 is still greater than the second time interval S2. When the adjustment signal Gb is set in the second half of the driving signal Ga, the adjustment signal Gb has a greater effect on the release of the built-in electric field, and can bring a greater brightness change value to the electrophoretic display panel compared to setting the adjustment signal Gb in the first half of the driving signal Ga.

[0057] For example, reference Figure 6 , the time interval between the start time of the adjustment signal Gb and the start time of the drive signal Ga is the first time interval S1, the first time interval S1 is 6 P0, and the duration of the adjustment signal Gb is 2 unit time periods P0. The end time of the adjustment signal Gb is the start time of the second sub-drive signal Ga2. The time interval between the end time of the adjustment signal Gb and the end time of the second sub-drive signal Ga2 is the second time interval S2, and the second time interval S2 is equal to 5 P0. The end time of the drive signal Ga is the end time of the second sub-drive signal Ga2. The time interval between the start time of the adjustment signal Gb and the end time of the drive signal Ga is the fourth time interval S4, and the fourth time interval S4 is equal to 7 P0. The fourth time interval S4 is greater than the first time interval S1, that is, 7P0>6PO.

[0058] Based on the above embodiments, Figure 3 and Figure 4 , the last sub-driving signal includes a unit period P0. In the embodiment of the present invention, the adjustment signal Gb is inserted before the last unit period P0 of the driving signal Ga. At this moment, the built-in electric field of the electrophoretic particles is strong, and the adjustment signal Gb has a greater effect on the release of the built-in electric field by the electrophoretic particles, which can bring a greater brightness change value to the electrophoretic display panel.

[0059] Figure 7 Another driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention is shown in FIG. Figure 7 , the multiple adjustment signals Gb include a first adjustment signal Gb1 and a second adjustment signal Gb2, and the first adjustment signal Gb1 is located before the second adjustment signal Gb2. There is at least one sub-drive signal Gc between the first adjustment signal Gb1 and the second adjustment signal Gb2. In an embodiment of the present invention, the non-adjacent first adjustment signal Gb1 and the second adjustment signal Gb2 can be inserted into the drive signal Ga, and the drive signal Ga can be divided into three sub-drive signals Gc, namely the first sub-drive signal Ga1, the second sub-drive signal Ga2, and the third sub-drive signal Ga3. The built-in electric field is released within the duration of the first adjustment signal Gb1 and the second adjustment signal Gb2, which can bring a larger brightness change value to the electrophoretic display panel and improve the adjustment accuracy of the brightness change value.

[0060] Optionally, refer to Figure 7 , the duration of the second adjustment signal Gb2 is at least one unit period P0, and the time interval between the end time of the first adjustment signal Gb1 and the start time of the second adjustment signal Gb2 is the fifth time interval S5. The duration of the second adjustment signal Gb2 is less than the fifth time interval S5. It can also be understood that the fifth time interval S5 is the time to establish the built-in electric field, and the duration of the second adjustment signal Gb2 is the time to eliminate the built-in electric field. In the embodiment of the present invention, considering that the adjustment signal Gb can play a role in reducing the built-in electric field, and the time to establish the built-in electric field is greater than the time to eliminate the built-in electric field, the duration of the second adjustment signal Gb2 is set to be less than the fifth time interval S5.

[0061] For example, reference Figure 7 The first adjustment signal Gb1 and the second adjustment signal Gb2 are set at intervals, and the built-in electric field is released at different time periods. The first adjustment signal Gb1 is set before the second adjustment signal Gb2, and the second adjustment signal Gb2 has a greater release effect on the built-in electric field than the first adjustment signal Gb1, which can bring a greater brightness change value to the electrophoretic display panel.

[0062] For example, reference Figure 7 , the end time of the first adjustment signal Gb1 is the start time of the second sub-driving signal Ga2, and the start time of the second adjustment signal Gb2 is the end time of the second sub-driving signal Ga2. The duration of the second adjustment signal Gb2 is one unit period P0, the fifth time interval S5 is equal to 8 P0s, and the duration of the second adjustment signal Gb2 is less than the fifth time interval S5, that is, P0<8PO.

[0063] Optionally, refer to Figure 7 , the time interval between the end time of the first adjustment signal Gb1 and the start time of the second adjustment signal Gb2 is the fifth time interval S5, the time interval between the start time of the driving signal Ga and the end time of the driving signal Ga is the third time interval S3, and the fifth time interval S5 is greater than or equal to half of the third time interval S3. In the embodiment of the present invention, the first adjustment signal Gb1 is set in the first half of the driving signal Ga, and the second adjustment signal Gb2 is set in the second half of the driving signal Ga. The first adjustment signal Gb1 releases the built-in electric field in the first half, and the second adjustment signal Gb2 releases the built-in electric field in the second half. The release and superposition can bring a larger brightness change value to the electrophoretic display panel, thereby improving the adjustment accuracy of the brightness change value.

[0064] For example, reference Figure 7, the first time interval S1 is equal to 2 P0. The duration of the first adjustment signal Gb1 is one unit time period P0. The fifth time interval S5 is equal to 8 P0. The duration of the second adjustment signal Gb2 is one unit time period P0. The time interval from the start time to the end time of the third sub-drive signal Ga3 is the second time interval S2, and the second time interval S2 is equal to 1 P0. The start time of the drive signal Ga is the start time of the first sub-drive signal Ga1, and the end time of the drive signal Ga is the end time of the third sub-drive signal Ga3. The third time interval S3 is equal to 13 P0. The fifth time interval S5 is greater than half of the third time interval S3, that is, 8P0>6.5P0.

[0065] In other embodiments, in combination with the brightness requirement of the electrophoretic display panel, the first adjustment signal Gb1 and the second adjustment signal Gb2 may be inserted in the first half of the driving signal Ga; or, the first adjustment signal Gb1 and the second adjustment signal Gb2 may be inserted in the second half of the driving signal Ga, and the built-in electric field is released and superimposed to bring a larger brightness change value to the electrophoretic display panel, thereby achieving the target brightness of the electrophoretic display panel.

[0066] Optionally, refer to Figure 7 , the duration of the first adjustment signal Gb1 is at least one unit period P0, and the time interval between the end time of the first adjustment signal Gb1 and the start time of the second adjustment signal Gb2 is the fifth time interval S5. The duration of the first adjustment signal Gb1 is less than the fifth time interval S5. In the embodiment of the present invention, the duration of the first adjustment signal Gb1 is set to be less than the time interval between the first adjustment signal Gb1 and the second adjustment signal Gb2, so as to ensure that the time for establishing the built-in electric field is greater than the time for eliminating the built-in electric field.

[0067] For example, reference Figure 7 , the duration of the first adjustment signal Gb1 is one unit period P0. The fifth time interval S5 is equal to 8 P0s, that is, the duration of the first adjustment signal Gb1 is less than the fifth time interval S5.

[0068] Optionally, refer to Figure 7 , the duration of the first adjustment signal Gb1 is at least one unit period P0, and the time interval between the start time of the first adjustment signal Gb1 and the start time of the driving signal G2 is the first time interval S1. The duration of the first adjustment signal Gb1 is less than the first time interval S1. In the embodiment of the present application, the time for eliminating the built-in electric field is set to be less than the time for establishing the built-in electric field. After the built-in electric field is established for the first time interval S1 in the first half of the driving signal Ga, the first adjustment signal Gb1 is inserted to release part of the built-in electric field, so as to ensure that the built-in electric field is released after the built-in electric field is accumulated in the first half of the driving signal Ga. In this way, a small amount of adjustment of the display brightness change can be brought about, thereby achieving the purpose of more precise brightness adjustment.

[0069] For example, reference Figure 7 , the duration of the first adjustment signal Gb1 is one unit period P0. The first time interval S1 is equal to 2 P0, that is, the duration of the first adjustment signal Gb1 is less than the first time interval S1.

[0070] Optionally, refer to Figure 7 , the duration of the first adjustment signal Gb1 is at least one unit period P0, the duration of the second adjustment signal Gb2 is at least one unit period P0, and the duration of the first adjustment signal Gb1 is equal to the duration of the second adjustment signal Gb2. In the embodiment of the present invention, the duration of the first adjustment signal Gb1 is one unit period P0, and the duration of the second adjustment signal Gb2 is one unit period P0.

[0071] Figure 8 Another driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention is shown in FIG. Figure 8 In other embodiments, the duration of the first adjustment signal Gb1 is different from the duration of the second adjustment signal Gb2. Exemplarily, the duration of the first adjustment signal Gb1 is one unit period P0. The duration of the second adjustment signal Gb2 is two unit periods P0. The duration of the second adjustment signal Gb2 is greater than the first adjustment signal Gb1, which can bring a greater brightness change value to the electrophoretic display panel in the second half of the driving signal Ga, thereby achieving the target brightness of the electrophoretic display panel.

[0072] Fig. 9 Another driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention, Fig.10 Another driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention is shown in FIG. Figure 7-Figure 10 , the plurality of sub-drive signals Gc include a first sub-drive signal Ga1, a second sub-drive signal Ga2, and a third sub-drive signal Ga3 which are sequentially arranged. The first adjustment signal Gb1 is located between the first sub-drive signal Ga1 and the second sub-drive signal Ga2, and the second adjustment signal Gb2 is located between the second sub-drive signal Ga2 and the third sub-drive signal Ga3. The first sub-drive signal Ga1, the second sub-drive signal Ga2, and the third sub-drive signal Ga3 have the same voltage polarity. In the embodiment of the present application, the voltage of the sub-drive signal Gc can be a negative voltage or a positive voltage. For example, referring to Figure 7 and Figure 8 , the voltage of the sub-drive signal Gc is +V0. Fig. 9 and Fig.10 , the voltage of the sub-driving signal Gc is -V0, and the voltages of the first adjustment signal Gb1 and the second adjustment signal Gb2 in one unit period P0 are both 0.

[0073] Fig.11Another driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention is shown in FIG. Fig.11 , the multiple sub-drive signals Gc include a first sub-drive signal Ga1, a second sub-drive signal Ga2 and a third sub-drive signal Ga3 which are sequentially arranged. The first adjustment signal Gb1 is located between the first sub-drive signal Ga1 and the second sub-drive signal Ga2, and the second adjustment signal Gb2 is located between the second sub-drive signal Ga2 and the third sub-drive signal Ga3. The first sub-drive signal Ga1, the second sub-drive signal Ga2 and the third sub-drive signal Ga3 include two voltage polarities. In an embodiment of the present application, the voltages of the sub-drive signals Gc are at least two different. By inserting the first adjustment signal Gb1 and the second adjustment signal Gb2 into the drive signal Ga, a small amount of adjustment of the display brightness change can be brought about, thereby achieving the purpose of finer brightness adjustment. Furthermore, by setting parameters such as the duration and voltage of the first adjustment signal Gb1 and the second adjustment signal Gb2, the display brightness of the pixel can be accurately controlled, thereby achieving the target brightness.

[0074] For example, reference Fig.11 , the voltage of the second sub-driving signal Ga2 is +V0, the voltage of the first sub-driving signal Ga1 and the third sub-driving signal Ga3 is -V0, the voltage of the first adjustment signal Gb1 in a unit period P0 is 0, and the voltage of the second adjustment signal Gb2 in a unit period P0 is 0. The first adjustment signal Gb1 releases part of the built-in electric field accumulated by the first sub-driving signal Ga1, and the second adjustment signal Gb2 releases part of the built-in electric field accumulated by the first sub-driving signal Ga1 and the second sub-driving signal Ga2, which brings about a brightness change for the electrophoretic display panel, which is conducive to achieving the target brightness of the electrophoretic display panel.

[0075] Optionally, refer to Figure 3-Figure 11 , the duration of the adjustment signal Gb inserted into a driving signal Ga does not exceed 5 unit periods P0. Considering that the duration of the data signal includes the duration of the driving signal Ga and the duration of the adjustment signal Gb, if the number of adjustment signals Gb is too large, the response time of the data signal will be too long and the time loss will be too large. In an embodiment of the present invention, the duration of all adjustment signals Gb in a driving signal Ga is set to not exceed 5 unit periods P0, which can not only bring a larger brightness change value to the electrophoretic display panel, but also meet the fast response.

[0076] Optionally, refer to 4- Fig.11, the data signal includes a data enable level and a data disable level. In one embodiment, the voltage of the data enable level includes a positive voltage or a negative voltage, and the voltage of the data disable level is zero. The adjustment signal Gb includes a zero insertion signal, and a zero insertion signal includes a data disable level within a unit period P0. In the embodiment of the present invention, a zero insertion signal can also be understood as that the voltage of the data disable level is zero within a unit period P0. Reference Figure 2 Under the action of the external electric field, there is a built-in electric field inside the electrophoretic particles. The zero signal is equivalent to temporarily removing the external electric field, which causes the built-in electric field to weaken. When the external electric field is applied again, the movement rate of the electrophoretic particles increases, thereby adjusting the electrophoretic particles to reach the preset position of the first substrate 11 or the second substrate 12 during the data signal driving stage, bringing a slight change in the brightness of the electrophoretic display panel.

[0077] For example, reference Figure 4 and Figure 5 , the adjustment signal Gb consists of a zero insertion signal. Figure 6 , the adjustment signal Gb consists of two adjacent zero insertion signals. Figure 7 , Fig. 9 and Fig.11 , the multiple adjustment signals Gb are composed of 2 non-adjacent zero insertion signals. Figure 8 and Fig.10 , the multiple adjustment signals Gb are composed of a zero-insertion signal group and two adjacent zero-insertion signals.

[0078] Fig.12 Another driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention is shown in FIG. Fig.12 , the adjustment signal Gb includes a pulse pair signal, the pulse pair signal includes a positive pulse +b and a negative pulse -b, the positive pulse +b has a data enable level of a positive voltage, the negative pulse -b has a data enable level of a negative voltage, and the absolute value of the data enable level of the positive voltage is equal to the data enable level of the negative voltage. In an embodiment of the present invention, the adjustment signal Gb can adopt at least one group of pulse pair signals, and the pulse pair signal consists of at least one positive pulse +b and one negative pulse -b. When the adjustment signal Gb is driven, the insertion of the positive pulse +b strengthens the effect of the external electric field and accumulates the built-in electric field; the insertion of the negative pulse -b will change the direction of the external electric field and release the built-in electric field. In this way, a small amount of adjustment of the brightness change of the electrophoretic display panel can be brought about, thereby achieving the purpose of more precise brightness adjustment.

[0079] For example, reference Fig.12, the adjustment signal Gb is inserted into the driving signal Ga, and the adjustment signal Gb is composed of a group of pulse pair signals, and the pulse pair signal is composed of a positive pulse +b and a negative pulse -b. The data enable level of the driving signal Ga is a positive voltage, and the voltage is +V0; the voltage of the positive pulse +b in the pulse pair signal is +V0, and the voltage of the negative pulse -b is -V0.

[0080] Fig.13 Another driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention is shown in FIG. Fig.12 , the adjustment signal Gb includes a zero insertion signal and a pulse pair signal, and the pulse pair signal includes a positive pulse +b and a negative pulse -b. In the embodiment of the present invention, the adjustment signal Gb includes at least one zero insertion signal and a group of pulse pair signals, and the zero insertion signal and the pulse pair signal are used to bring about a small amount of adjustment of the display brightness change, thereby achieving the purpose of more precise brightness adjustment.

[0081] For example, reference Fig.13 , the adjustment signal Gb is inserted into the driving signal Ga, and the adjustment signal Gb consists of a zero insertion signal and a group of pulse pair signals, and the pulse pair signal consists of a positive pulse +b and a negative pulse -b. The data enable level of the driving signal Ga is a positive voltage, the voltage is +V0, the voltage of the zero insertion signal is 0, the voltage of the positive pulse +b in the pulse pair signal is +V0, and the voltage of the negative pulse -b is -V0.

[0082] Some feasible ways of setting the adjustment signal are listed below. In the following embodiments, the voltage of the drive signal Ga is +V0, -V0 or a combination of +V0 and -V0, which is not limited here.

[0083] Fig.14 A driving timing diagram of an adjustment signal provided by an embodiment of the present invention, referring to Fig.14 , when the adjustment signal Gb includes a pulse pair signal, the adjustment signal Gb includes a positive pulse +b, a negative pulse -b, a positive pulse +b and a negative pulse -b arranged in sequence. In an embodiment of the present invention, the adjustment signal Gb is composed of a positive pulse +b, a negative pulse -b, a positive pulse +b and a negative pulse -b, and the adjustment signal Gb in this combination form is inserted into the drive signal Ga. The positive pulse +b accumulates the built-in electric field, and the negative pulse -b releases the built-in electric field, which can bring a small amount of adjustment of the display brightness change to the electrophoretic display panel, thereby achieving the purpose of more precise brightness adjustment and meeting the target brightness requirements.

[0084] Fig.15 Another driving timing diagram of the adjustment signal provided by the embodiment of the present invention is shown in FIG. Fig.15, when the adjustment signal Gb includes a pulse pair signal, the adjustment signal Gb includes a negative pulse -b, a positive pulse +b, a positive pulse +b and a negative pulse -b arranged in sequence. In the embodiment of the present invention, the adjustment signal Gb is composed of a negative pulse -b, a positive pulse +b, a positive pulse +b and a negative pulse -b. The adjustment signal Gb in this combined form is inserted into the driving signal Ga to achieve the purpose of more precise brightness adjustment and meet the target brightness requirement.

[0085] Fig.16 Another driving timing diagram of an adjustment signal provided by an embodiment of the present invention, Fig.17 Another driving timing diagram of the adjustment signal provided by the embodiment of the present invention is shown in FIG. Fig.16 and Fig.17 , when the adjustment signal Gb includes a zero insertion signal and a pulse pair signal, the pulse pair signal is adjacent to the zero insertion signal, and the pulse pair signal is located before the zero insertion signal. In an embodiment of the present invention, the pulse pair signal consists of a positive pulse +b and a negative pulse -b, and the zero insertion signal is located after the negative pulse -b. When the voltage of the driving signal in the writing stage is a positive voltage, it can be Fig.16 The adjustment signal Gb shown is inserted into the drive signal Ga; when the voltage of the drive signal in the writing phase is a negative voltage, the Fig.17 The adjustment signal Gb shown is inserted into the driving signal Ga to achieve a more precise brightness adjustment and meet the target brightness requirement.

[0086] Fig.18 Another driving timing diagram of an adjustment signal provided by an embodiment of the present invention, Fig.19 Another driving timing diagram of the adjustment signal provided by the embodiment of the present invention is shown in FIG. Fig.18 and Fig.19 , when the adjustment signal Gb includes a zero insertion signal and a pulse pair signal, the pulse pair signal is adjacent to the zero insertion signal, and the zero insertion signal is located before the pulse pair signal. In an embodiment of the present invention, the pulse pair signal consists of a positive pulse +b and a negative pulse -b, and the zero insertion signal is located before the positive pulse +b. When the voltage of the driving signal in the writing stage is a positive voltage, it can be Fig.18 The adjustment signal Gb shown is inserted into the drive signal Ga; when the voltage of the drive signal in the writing phase is a negative voltage, the Fig.19 The adjustment signal Gb shown is inserted into the driving signal Ga, so as to achieve the purpose of more precise brightness adjustment and meet the target brightness requirement.

[0087] Fig. 20 Another driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention is shown in FIG. Fig. 20, optionally, the data signal includes a data enable level and a data non-enable level. The data enable level includes a first data enable level and a second data enable level, and the absolute values ​​of the first data enable level and the second data enable level are not equal. In the scheme using a zero insertion signal and / or a pulse pair signal, the voltage absolute value of the data enable level is a numerical value. In an embodiment of the present invention, a first data enable level and a second data enable level with different voltage absolute values ​​are used to achieve fine adjustments that cannot be achieved when there is only one voltage absolute value. For example, after inserting the adjustment voltage +V1, there are voltage values ​​other than positive and negative V0 to adjust.

[0088] refer to Fig. 20 , if the data signal in the writing phase includes the first drive signal D1, the duration of the first drive signal D1 is t1, and the brightness of the pixel driven by the first drive signal D1 is L1. If the data signal in the writing phase includes the second drive signal D2, the duration of the second drive signal D2 is t2, and the brightness of the pixel driven by the second drive signal D2 is L2. The target brightness of the electrophoretic display panel is Ln, L1<Ln<L2. t2>t1, t2-t1=P0. If only the first drive signal D1 or the second drive signal D2 is used, it is impossible to accurately control the display brightness of the pixel and the target brightness cannot be achieved.

[0089] In an embodiment of the present invention, an adjustment signal Gb may be inserted into the driving signal in the writing phase, and the adjustment signal Gb is a pulse pair signal, and the pulse pair signal includes a positive pulse +b and a negative pulse -b arranged sequentially, and the voltage absolute values ​​of the positive pulse +b and the negative pulse -b are different. For example, referring to Fig. 20 , the adjustment signal Gb is a pulse pair signal, the voltage of the positive pulse +b is +V1, and the voltage of the negative pulse -b is -V2. |+V1|≠|-V2|. In the writing stage, the pulse pair signals with different voltage absolute values ​​can be inserted into the second drive signal D2 in this combination form to obtain the fourth drive signal D4, so that the brightness value that cannot be achieved during PWM adjustment can be achieved.

[0090] For example, take positive voltage for white and negative voltage for black. If V1>V2>V0>0, the brightness before inserting voltage V2 is less than the brightness after inserting voltage V2. If V1>V0>V2, the brightness before inserting voltage V2 is greater than the brightness after inserting voltage V2. In this way, the display brightness of the pixels of the electrophoretic display panel can be accurately controlled to achieve the target brightness.

[0091] It should be noted that due to the different materials of the electrophoretic particles, the black brushing response time of the electrophoretic display panel is not equal to the white brushing response time. In some embodiments, the electrophoretic display panel shows that the response rate of black brushing is greater than the response rate of white brushing. In some embodiments, the electrophoretic display panel shows that the response rate of black brushing is less than the response rate of white brushing. Among them, the black brushing response time is the time required to drive from 90% of the maximum brightness of the pixel 23 to 10% of the maximum brightness of the pixel 23, and the white brushing response time is the time required to drive from 10% of the maximum brightness of the pixel 23 to 90% of the maximum brightness of the pixel 23.

[0092] The embodiments of the present invention take black electrophoretic particles and white electrophoretic particles as examples. The following embodiments take the case where the response rate of the electrophoretic display panel for brushing black is greater than the response speed of brushing white, and the driving signal is a positive potential (+V0) for brushing white and a negative potential (-V0) for brushing black as an example to explain the driving of the electrophoretic display panel.

[0093] refer to Figure 3 In the driving stage, the driving voltage of the driving signal Ga is set to V i , driving time is t i , t i In units of frame time, the effective driving power is

[0094] The driving voltage of the first driving signal D1 is +V0, the driving time is t1, and the effective driving power of the first driving signal D1 is The brightness of the driven pixel is L1, and the gray scale corresponding to the brightness L1 is G1.

[0095] The driving voltage of the second driving signal D2 is +V0, the driving time is t2, and the effective driving power of the second driving signal D2 is The brightness of the driven pixel is L2, and the gray scale corresponding to the brightness L2 is G2.

[0096] When t2>t1, Then L2>L1. Wherein, P0=t2-t1. P0 is a unit period.

[0097] When the target brightness of the pixel is Ln, L1<Ln<L2, at least one adjustment signal Gb may be inserted into the drive signal in the writing phase as provided in the above embodiment to obtain the third drive signal D3.

[0098] In some embodiments, reference Figure 3, the adjustment signal Gb is a zero insertion signal, and the voltage of the zero insertion signal is zero. When the driving signal is positively voltage-brushed, when the brightness L1 of the pixel driven by the existing first driving signal D1 is lower than the target brightness Ln and after one frame of effective driving, that is, the brightness L2 achieved by driving with the second driving signal D2 is higher than the target brightness Ln, the brightness L1 achieved by the first driving signal D1 can be increased to the target brightness Ln by inserting the zero insertion signal into the first driving signal D1.

[0099] Fig.21 Another driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention is shown in FIG. Fig.21 In some embodiments, the adjustment signal Gb is a zero insertion signal, and the voltage of the zero insertion signal is zero. When the driving signal has a negative voltage and is black, when the brightness L2 achieved by the existing second driving signal D2 is higher than the target brightness Ln and after effective driving minus 1 frame, that is, when the brightness L1 achieved by the first driving signal D1 is lower than the target brightness Ln, the zero insertion signal can be inserted into the existing second driving signal D2 to reduce the brightness L2 achieved by the existing second driving signal D2 to the target brightness Ln and adjust to the target grayscale.

[0100] In some embodiments, reference Fig.12 , the adjustment signal Gb is a pulse pair signal, and the pulse pair signal consists of a positive pulse +b and a negative pulse -b. For positive voltage whitening, when the brightness L achieved by the existing driving signal is lower than the target brightness Ln, and the brightness L' achieved by the driving signal after adding 1 frame is higher than the target brightness Ln, the pulse pair signal can be inserted on the basis of the driving signal corresponding to the brightness L' to obtain the following Fig.12 The driving signal Ga and the pulse pair signal shown reduce the brightness L' achieved by the existing driving signal to the target brightness Ln, and adjust to the target grayscale.

[0101] Fig. 22 Another driving timing diagram of an electrophoretic display panel provided in an embodiment of the present invention, in some embodiments, refer to Fig. 22 , the adjustment signal Gb is a pulse pair signal, and the pulse pair signal consists of a positive pulse +b and a negative pulse -b. For the negative voltage black brush of the driving signal, when the brightness L achieved by the existing driving signal is higher than the target brightness Ln, and the brightness L' achieved by the existing driving signal minus 1 frame is lower than the target brightness Ln, the pulse pair signal can be inserted on the basis of the existing driving signal corresponding to the brightness L to obtain the following Fig. 22 The driving signal Ga and the pulse pair signal shown reduce the brightness L achieved by the existing driving signal to the target brightness Ln, and adjust to the target grayscale.

[0102] Optionally, refer to Figure 1 and Figure 4In the writing phase P1, different data signals are written to at least two pixels 23. It can be understood that the writing phase P1 is a phase for performing a differentiation operation, and different data signals are written to at least two pixels 23 through the writing phase P1, thereby realizing image display of the electrophoretic display panel.

[0103] Fig.23 A driving timing diagram of an electrophoretic display panel provided by an embodiment of the present invention, referring to Figure 1 , Figure 2 and Fig.23 Before the writing phase P1 of the electrophoretic display panel, its driving phase may further include an erasing phase P2 and / or an activating phase P3. In the embodiment of the present invention, the driving phase of the electrophoretic display panel includes an erasing phase P2, an activating phase P3 and a writing phase P1 which are arranged sequentially.

[0104] In the erasing stage P2, the same data signal Source is provided to different pixels 23, different pixels 23 can have the same display brightness, different pixels 23 can have the same grayscale, and the electrophoretic display panel is driven to a uniform optical limit (black grayscale or white grayscale), which is conducive to eliminating the residual image of the previous frame. Before the driving signal of the writing stage P1 arrives, the electrophoretic particles of each pixel 23 are in the same spatial position.

[0105] In the activation phase P3 , the same data signal Source is provided to different pixels 23 . The activation phase P3 is configured to activate the electrophoretic particles to prevent the electrophoretic particles with different charges from agglomerating.

[0106] For example, reference Figure 1 and Fig.23 , Fig.23 The figure also shows a scanning signal Gate on a scanning line 21. The interval between two pulses in the scanning signal Gate includes a unit period P0. In a unit period P0, the scanning line 21 is scanned from the first scanning line 21 to the last scanning line 21 row by row.

[0107] It should be noted that if the pixel remains in the same state for a long time, the mobility of the charged electrophoretic particles will increase, which is not conducive to the display of the next stage. The activity of the electrophoretic particles can be increased by driving the electrophoretic display panel multiple times to reach the optical limit.

[0108] Based on the same inventive concept, an embodiment of the present invention further provides a display device. Fig.24 A schematic diagram of a top view of a display device provided by an embodiment of the present invention, referring to Fig.24The display device 300 includes the electrophoretic display panel 200 provided in the above embodiment. Therefore, the display device also has the beneficial effects of the electrophoretic display panel in the above embodiment. The similarities can be understood by referring to the above explanation of the electrophoretic display panel, which will not be repeated below.

[0109] The display device 300 provided in the embodiment of the present invention can be Fig.24 The electronic paper shown can also be any electronic product with a display function, including but not limited to the following categories: mobile phones, televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, industrial control equipment, medical display screens, touch interactive terminals, etc. The embodiments of the present invention do not specifically limit this.

[0110] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An electrophoretic display panel, characterized in that: include: a first substrate and electrophoretic particles; A scan line, a data line and a pixel are located on the same side of the first substrate facing the electrophoretic particles, the scan line is configured to transmit a scan signal to the pixel, the data line is configured to transmit a data signal to the pixel, and the data signal includes a plurality of unit time periods; The driving stage of the electrophoretic display panel includes a writing stage. In the writing stage, the data signal includes a driving signal and at least one adjustment signal. The adjustment signal is inserted into the driving signal to divide the driving signal into at least two sub-driving signals; wherein a voltage of at least one of the sub-driving signals is different from a voltage of the adjustment signal within one of the unit time periods.

2. The electrophoretic display panel according to claim 1, characterized in that: In the writing stage, the difference between the brightness of the pixel driven by the data signal and the brightness of the pixel driven by the driving signal is a brightness difference, and the brightness difference is smaller than the brightness change value of the pixel driven by the driving signal within one unit period.

3. The electrophoretic display panel according to claim 1, characterized in that: The time interval between the start time of the adjustment signal and the start time of the drive signal is greater than the time interval between the end time of the adjustment signal and the end time of the drive signal.

4. The electrophoretic display panel according to claim 3, characterized in that: The time interval between the start time of the regulating signal and the start time of the driving signal is greater than or equal to half of the time interval between the start time of the driving signal and the end time of the driving signal.

5. The electrophoretic display panel according to claim 3, characterized in that: The time interval between the start time of the adjustment signal and the start time of the drive signal is smaller than the time interval between the start time of the adjustment signal and the end time of the drive signal.

6. The electrophoretic display panel according to claim 3, characterized in that: The last sub-driving signal includes one unit period.

7. The electrophoretic display panel according to claim 1, characterized in that: The plurality of adjustment signals include a first adjustment signal and a second adjustment signal, wherein the first adjustment signal is located before the second adjustment signal; There is at least one sub-driving signal between the first regulating signal and the second regulating signal.

8. The electrophoretic display panel according to claim 7, characterized in that: The duration of the second adjustment signal is shorter than the time interval between the end time of the first adjustment signal and the start time of the second adjustment signal.

9. The electrophoretic display panel according to claim 8, characterized in that: The time interval between the end time of the first adjustment signal and the start time of the second adjustment signal is greater than or equal to half of the time interval between the start time of the drive signal and the end time of the drive signal.

10. The electrophoretic display panel according to claim 7, characterized in that: The duration of the first adjustment signal is shorter than the time interval between the end time of the first adjustment signal and the start time of the second adjustment signal.

11. The electrophoretic display panel according to claim 7, characterized in that: The duration of the first adjustment signal is shorter than the time interval between the start time of the first adjustment signal and the start time of the driving signal.

12. The electrophoretic display panel according to claim 7, characterized in that: The duration of the first adjustment signal is equal to the duration of the second adjustment signal.

13. The electrophoretic display panel according to claim 7, characterized in that: The plurality of sub-driving signals include a first sub-driving signal, a second sub-driving signal and a third sub-driving signal which are sequentially arranged; the first adjustment signal is located between the first sub-driving signal and the second sub-driving signal, and the second adjustment signal is located between the second sub-driving signal and the third sub-driving signal; The first sub driving signal, the second sub driving signal and the third sub driving signal have the same voltage polarity.

14. The electrophoretic display panel according to claim 7, characterized in that: The plurality of sub-driving signals include a first sub-driving signal, a second sub-driving signal and a third sub-driving signal which are sequentially arranged; the first adjustment signal is located between the first sub-driving signal and the second sub-driving signal, and the second adjustment signal is located between the second sub-driving signal and the third sub-driving signal; The first sub driving signal, the second sub driving signal and the third sub driving signal include two voltage polarities.

15. The electrophoretic display panel according to claim 1, characterized in that: The duration of the adjustment signal inserted into one of the driving signals does not exceed 5 unit time periods.

16. The electrophoretic display panel according to claim 1, characterized in that: The data signal includes a data enable level and a data disable level; The adjustment signal includes a zero insertion signal, and one of the zero insertion signals includes a data non-enable level within one of the unit time periods; and / or, The adjustment signal includes a pulse pair signal, the pulse pair signal includes a positive pulse and a negative pulse, the positive pulse has a data enable level of a positive voltage, the negative pulse has a data enable level of a negative voltage, and the absolute value of the data enable level of the positive voltage is equal to the absolute value of the data enable level of the negative voltage.

17. The electrophoretic display panel according to claim 16, characterized in that: When the adjustment signal includes the pulse pair signal, The regulating signal includes the positive pulse, the negative pulse, the positive pulse and the negative pulse arranged in sequence; or, The adjustment signal includes the negative pulse, the positive pulse, the positive pulse, and the negative pulse that are sequentially arranged.

18. The electrophoretic display panel according to claim 16, characterized in that: When the adjustment signal includes the zero insertion signal and the pulse pair signal, The pulse pair signal is adjacent to the zero insertion signal, and the pulse pair signal is located before the zero insertion signal.

19. The electrophoretic display panel according to claim 16, characterized in that: When the adjustment signal includes the zero insertion signal and the pulse pair signal, The pulse pair signal is adjacent to the zero insertion signal, and the zero insertion signal is located before the pulse pair signal.

20. The electrophoretic display panel according to claim 1, characterized in that: The data signal includes a data enable level and a data disable level; The data enable level includes a first data enable level and a second data enable level, and absolute values ​​of the first data enable level and the second data enable level are not equal.

21. The electrophoretic display panel according to claim 1, characterized in that: The black-brush response time and the white-brush response time of the electrophoretic display panel are not equal; Among them, the black brush response time is the time required to drive the pixel from 90% of the maximum brightness to 10% of the maximum brightness of the pixel, and the white brush response time is the time required to drive the pixel from 10% of the maximum brightness to 90% of the maximum brightness of the pixel.

22. The electrophoretic display panel according to claim 1, characterized in that: In the writing phase, different data signals are written into at least two pixels.

23. A display device, characterized in that: An electrophoretic display panel comprising any one of claims 1-22.

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