Electronic paper display device, driving method thereof, and computer readable medium

Abstract

The present disclosure provides an electronic paper display device, a driving method thereof, and a computer-readable medium, which belong to the field of display technology. The present disclosure provides a driving method for an electronic paper display device, which includes: a controller inputting a first driving signal to a pixel electrode of a pixel driving circuit corresponding to a pixel that needs to display black according to an image to be displayed; and inputting a second driving signal to a pixel electrode of a pixel driving circuit corresponding to a pixel that needs to display white. Wherein, the driving stage of the electronic paper display device includes a first uniformization stage, and the first uniformization stage includes multiple sub-uniformization stages. In the last sub-uniformization stage, the first driving signal includes a first sub-driving signal, and the second driving signal includes a second sub-driving signal. The voltage of the first sub-driving signal is opposite to the electrical properties of the black particles in the electronic paper display device, and the voltage of the second sub-driving signal is opposite to the electrical properties of the white particles in the electronic paper display device.

Description

Technical Field

[0001] The present disclosure belongs to the field of display technology, and particularly relates to an electronic paper display device, a driving method thereof, and a non-transitory computer-readable medium. Background Art

[0002] Electronic paper (E-paper, also known as electronic ink) display devices have the effects of eye protection and power saving, and therefore have attracted widespread attention.

[0003] The electronic paper display device includes a controller, a substrate, multiple pixel drive circuits disposed on the substrate, and an electronic paper film. The electronic paper film includes multiple microstructures, and the pixel drive circuit includes a common electrode and multiple pixel electrodes between the multiple microstructures. Each microstructure contains red electrophoretic particles. The controller controls the movement of the electrophoretic particles by controlling the electric fields generated by the common electrode and the pixel electrodes. When the red particles are applied to the electrophoretic particles of multiple colors, different electric fields are applied to control the multiple microstructures to display different colors, thereby achieving display. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art and provides an electronic paper display device and a driving method thereof, and a non-transitory computer-readable medium.

[0005] In a first aspect, the present disclosure provides a driving method for an electronic paper display device, which includes a controller, a substrate, a plurality of pixel driving circuits arranged on the substrate, and an electronic paper film, wherein the electronic paper film includes a plurality of microstructures, and the plurality of pixel driving circuits include a common electrode and a plurality of pixel electrodes between the plurality of microstructures; each of the plurality of microstructures includes: black particles, white particles, and colored particles; wherein the electrical properties of the charges carried by the black particles and the white particles are opposite; the electrical properties of the charges carried by the black particles and the colored particles are the same, and the charge-to-mass ratio of the black particles is greater than the charge-to-mass ratio of the colored particles; the driving method includes: the controller controls the display device according to the plurality of microstructures; ... the plurality of pixel electrodes include a common electrode and a plurality of pixel electrodes between the plurality of microstructures; the plurality of pixel electrodes include a common electrode and a plurality of pixel electrodes between the plurality of microstructures; the plurality of pixel electrodes include a common electrode and a plurality of pixel electrodes For an image to be displayed, a first driving signal is input to the pixel electrode of the pixel driving circuit corresponding to the pixel that needs to display black; and a second driving signal is input to the pixel electrode of the pixel driving circuit corresponding to the pixel that needs to display white; wherein the driving stage of the electronic paper display device includes a first uniformization stage, and the first uniformization stage includes multiple sub-uniformization stages; in the last sub-uniformization stage, the first driving signal includes a first sub-driving signal, and the second driving signal includes a second sub-driving signal; the voltage of the first sub-driving signal is opposite to the electrical property of the black particles; and the voltage of the second sub-driving signal is opposite to the electrical property of the white particles.

[0006] The method further includes: the controller inputting a third driving signal to the pixel electrode of the pixel driving circuit corresponding to the pixel that needs to display color according to the image to be displayed; in the last sub-homogenization stage of the first homogenization stage, the third driving signal includes a third sub-driving signal; and the voltage of the third sub-driving signal is opposite to the electrical property of the color particles.

[0007] The driving phase of the electronic paper display device further includes a second equalization phase, which is prior to the first equalization phase; the first drive signal further includes a fourth sub-drive signal in the second equalization phase, the second drive signal further includes a fifth sub-drive signal in the second equalization phase, and the third drive signal further includes a sixth sub-drive signal in the second equalization phase; the fourth sub-drive signal, the fifth sub-drive signal, and the sixth sub-drive signal include a first voltage and a second voltage; and the effective duration of the second voltage is greater than the effective duration of the first voltage.

[0008] The driving stage of the electronic paper display device further includes a third uniformization stage, which is between the second uniformization stage and the first uniformization stage; the first driving signal further includes a seventh sub-driving signal in the third uniformization stage, the second driving signal further includes an eighth sub-driving signal in the third uniformization stage, and the third driving signal further includes a ninth sub-driving signal in the third uniformization stage; the seventh sub-driving signal, the eighth sub-driving signal, and the ninth sub-driving signal all include pulse signals in which positive and negative voltages alternate in sequence.

[0009] The effective duration of the negative voltage in the pulse signals in the seventh sub-driving signal, the eighth sub-driving signal, and the ninth sub-driving signal is greater than the effective duration of the positive voltage.

[0010] In which, the driving phase of the electronic paper display device also includes a fourth uniformization phase, and the fourth uniformization phase is before the display phase of the electronic paper display device; the first driving signal also includes a tenth sub-driving signal in the fourth uniformization phase, the second driving signal also includes an eleventh sub-driving signal in the fourth uniformization phase, and the third driving signal also includes a twelfth sub-driving signal in the fourth uniformization phase; the tenth sub-driving signal and the eleventh sub-driving signal include pulse signals with alternating negative and positive voltages; the pulse signals in the twelfth sub-driving signal and the tenth sub-driving signal are opposite to the pulse signals in the tenth sub-driving signal; the voltage of the common electrode of the pixel driving circuit includes a pulse signal with alternating negative and positive voltages, and has the same absolute value as the voltage of the pixel electrode in the same pixel driving circuit.

[0011] In which, the driving stage of the electronic paper display device also includes a balancing stage, and the balancing stage is before the fourth uniformization stage; the first driving signal also includes a thirteenth sub-driving signal in the balancing stage, the second driving signal also includes a fourteenth sub-driving signal in the balancing stage, and the third driving signal also includes a fifteenth sub-driving signal in the balancing stage; the thirteenth sub-driving signal and the fourteenth sub-driving signal can drive the white particles in the microstructure to return to their initial positions; the fifteenth sub-driving signal can drive the white particles and colored particles in the microstructure to return to their initial positions.

[0012] In which, the display stage includes a first sub-display stage, a second sub-display stage and a third sub-display stage; the first drive signal also includes a sixteenth sub-drive signal in the first sub-display stage, the second drive signal also includes a seventeenth sub-drive signal in the first sub-display stage, and the third drive signal also includes an eighteenth sub-drive signal in the second sub-display stage and the third sub-display stage; the sixteenth sub-drive signal includes the first voltage and zero voltage alternately set; the seventeenth sub-drive signal includes the zero voltage and the second voltage alternately set; the eighteenth sub-drive signal includes the second voltage, the zero voltage and the third voltage; wherein the effective duration of the third voltage is greater than the duration of the second voltage.

[0013] The second sub-display stage and the third sub-display stage are sequentially located after the first sub-display stage.

[0014] The starting driving moment of the first uniformization stage is sequentially increased in sub-uniformization stages, namely the first sub-uniformization stage, the second sub-uniformization stage, the third sub-uniformization stage, and the fourth sub-uniformization stage; the first driving signal further includes a nineteenth sub-driving signal in the first and second sub-uniformization stages; the second driving signal further includes a twenty-first sub-driving signal in the first and second sub-uniformization stages; the third driving signal further includes a twenty-third sub-driving signal in the first and second sub-uniformization stages; and the nineteenth sub-driving signal, the twenty-first sub-driving signal, and the twenty-third sub-driving signal all include pulse signals with alternating positive and negative voltages.

[0015] Wherein, the positive voltage duration of the pulse signal in the nineteenth sub-driving signal, the twenty-first sub-driving signal, and the twenty-third sub-driving signal is shorter than the negative voltage duration.

[0016] The first drive signal further includes a 20th sub-drive signal in the third sub-uniformization stage; the second drive signal further includes a 22nd sub-drive signal in the third sub-uniformization stage; the third drive signal further includes a 24th sub-drive signal in the third sub-uniformization stage; and the 20th sub-drive signal, the 22nd sub-drive signal, and the 24th sub-drive signal include a second voltage.

[0017] Wherein, the microstructure includes a microcup structure and a microcapsule structure.

[0018] In a second aspect, the present disclosure provides an electronic paper display device, comprising: a controller, a substrate, a plurality of pixel driving circuits arranged on the substrate, and an electronic paper film; the electronic paper film comprises a plurality of microstructures; each of the plurality of microstructures comprises: black particles, white particles, and colored particles; wherein the black particles and the white particles have charges of opposite electrical properties; the black particles and the colored particles have charges of the same electrical properties, and the charge-to-mass ratio of the black particles is greater than the charge-to-mass ratio of the colored particles; the controller is configured to generate a control signal and a drive signal according to the picture displayed by the color electronic paper in the display stage; the control signal is configured to control the conduction of the pixel driving circuit, and the drive signal is configured to drive the black particles, the white particles, and the colored particles in the microcup; the pixel driving circuit comprises a common electrode and a pixel electrode between the plurality of microstructures, and is configured to write the drive signal into the corresponding pixel electrode under the control of the control signal; the drive signal comprises at least a first drive signal, a second drive signal, and a third drive signal.

[0019] In which, the pixel driving circuit also includes a first transistor- and a second transistor; wherein the first electrode of the first transistor is connected to the data line, the second electrode of the first transistor is connected to the first electrode of the second transistor, the second electrode of the second transistor is connected to the pixel electrode, and the control electrodes of the first transistor and the second transistor are connected to the gate line.

[0020] The orthographic projection of the pixel electrode on the base substrate completely covers the orthographic projections of the first transistor and the second transistor on the base substrate.

[0021] The orthographic projection of the pixel electrode on the base substrate at least partially does not overlap with the orthographic projections of the first transistor and the second transistor on the base substrate.

[0022] In a third aspect, the present disclosure further provides a non-transitory computer-readable medium having a computer program stored thereon, wherein the program is executed by a processor to perform any of the methods described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a microstructure in the prior art;

[0024] Figure 2 A schematic diagram of the electronic paper display device disclosed herein;

[0025] Figure 3 A schematic diagram of a pixel driving circuit disclosed herein;

[0026] Figure 4 A cross-sectional view of the electronic paper film disclosed herein;

[0027] Figure 5 is another cross-sectional view of the electronic paper film disclosed herein;

[0028] Figure 6 Schematic diagram of a driving method of the electronic paper display device disclosed herein;

[0029] Figure 7 Schematic diagram of a first driving signal, a second driving signal, and a third driving signal of the electronic paper display device disclosed herein;

[0030] Figure 8 Schematic diagram of the driving signal of the electronic paper display device of the present disclosure in the first uniform stage;

[0031] Figure 9 Schematic diagram of the driving signal of the electronic paper display device of the present disclosure in the second uniform phase;

[0032] Figure 10 Schematic diagram of the driving signal of the electronic paper display device of the present disclosure in the third uniform stage;

[0033] Figure 11 Schematic diagram of driving signals of the electronic paper display device disclosed in the balance stage;

[0034] Figure 12 Schematic diagram of the driving signal of the electronic paper display device of the present disclosure in the fourth uniform stage;

[0035] Figure 13 Schematic diagram of driving signals in the first sub-display phase and the second sub-display phase of the electronic paper display device disclosed herein;

[0036] Figure 14 Schematic diagram of driving signals in the third sub-display phase of the electronic paper display device disclosed herein;

[0037] Figure 15 is a cross-sectional view of the pixel driving circuit disclosed herein;

[0038] Figure 16 is another cross-sectional view of the pixel driving circuit disclosed herein;

[0039] Figure 17 is a top view schematic diagram of the pixel driving circuit disclosed in the present invention;

[0040] Figure 18 FIG. 1 is another schematic top view of the pixel driving circuit disclosed in the present invention. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0042] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills 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. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before 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. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0043] like Figure 1As shown, an exemplary color electronic paper includes multiple microstructures 1, each of the multiple microstructures 1 includes: three colors of charged particles. The three colors of charged particles are white particles, black particles, and colored particles. The colored particles include but are not limited to red particles. In the embodiment of the present disclosure, the colored particles are red particles 6 as an example. The charge carried by the black particles 4 is opposite to that of the white particles 5, and is the same as that of the red particles 6, and the charge-to-mass ratio of the black particles 4 is greater than that of the red particles 6.

[0044] Those skilled in the art should understand that, since the black particles 4 and the red particles 6 have the same electrical properties and the charge-to-mass ratio of the black particles 4 is greater than that of the red particles 6, when a voltage is applied to the pixel electrode 11 and the common electrode 27 to generate an electric field, the movement speed of the black particles 4 is greater than the movement speed of the red particles 6.

[0045] Furthermore, the common electrodes 27 corresponding to the various microstructures 1 can be electrically connected together. In this case, the voltage signal applied to each common electrode 27 is the same, and the common electrodes 27 can be referred to as Vcom electrodes. Of course, the common electrodes 27 corresponding to the various microcups 1 can also be electrically disconnected. In this case, the voltage signals applied to the common electrodes 27 can be the same or different. In some embodiments, the common electrodes 27 can be grounded (i.e., at 0V).

[0046] There is no limitation on the electrical properties of the charges carried by the black particles 4, white particles 5, and red particles 6. The black particles 4 and red particles 6 can be positively charged, while the white particles 5 can be negatively charged. Alternatively, the black particles 4 and red particles 6 can be negatively charged, while the white particles 5 can be positively charged. In the disclosed embodiments, the black particles 4 and red particles 6 are positively charged, while the white particles 5 are negatively charged.

[0047] In addition, it should be noted that, in the embodiment of the present disclosure, when the voltage between the pixel electrode 11 and the common electrode 27 is the first voltage, the electric field between the pixel electrode 11 and the common electrode 27 drives the black particles 4 relative to the white particles 5 and the red particles 6 to be close to the display side, and the color displayed on the display side is black. The voltage value of the first voltage is +15V; when the voltage between the pixel electrode 11 and the common electrode 27 is the second voltage, the electric field between the pixel electrode 11 and the common electrode 27 drives the white particles 5 relative to the black particles 4 and the red particles 6 to be close to the display side, and the color displayed on the display side is white. The voltage value of the second voltage is -15V; when the voltage between the pixel electrode 11 and the common electrode 27 is the third voltage, the electric field between the pixel electrode 11 and the common electrode 27 drives the red particles 6 relative to the white particles 5 and the black particles 4 to be close to the display side, and the color displayed on the display side is red. The voltage value of the third voltage is +6.4V. The signs of the first voltage, the second voltage and the third voltage represent the direction of the electric field formed between the pixel electrode 11 and the common electrode 27. In the embodiment of the present disclosure, the direction from the substrate to the display side is the positive direction, and the opposite direction is the negative direction.

[0048] In the prior art, due to some problems in the driving process of the black particles 4, white particles 5 and red particles 6 in the microstructure 1, the electronic paper has afterimages during imaging. In particular, when the electronic paper displays a black image, the phenomenon of red particles 6 remaining in the black particles 4 is more serious, resulting in the electronic paper display device having insufficient quality.

[0049] To this end, the following technical solutions are provided in the embodiments of the present disclosure.

[0050] In a first aspect, an embodiment of the present disclosure provides a driving method for an electronic paper display device, wherein the electronic paper display device includes a controller 3, a substrate, a plurality of pixel driving circuits 2 and an electronic paper film arranged on the substrate, the electronic paper film includes a plurality of microstructures 1, and the plurality of pixel driving circuits 2 include a common electrode 27 and a plurality of pixel electrodes 11 between the plurality of microstructures 1.

[0051] Specifically, such as Figure 2The electronic paper display device shown includes a controller 3, a scan line driver circuit 21, a data line driver circuit 22, and a pixel driver circuit 2. The controller 3 generates an image signal (image data) representing the image displayed on the display unit 12, reset data for resetting when the image is updated, and various other signals (clock signals, etc.), and outputs them to the scan line driver circuit 21 or the data line driver circuit 22. The scan line driver circuit 21 is connected to each scan line 23, selects any one of these scan lines, and supplies a specified scan line signal 23 to the selected scan line. The scan line signal is a signal that shifts sequentially during its effective period (high level period). By outputting it to each scan line, the pixel circuits connected to each scan line are sequentially turned on. The data line driver circuit 14 is connected to each data line 24 and supplies a data signal to each pixel circuit selected by the scan line driver circuit 13.

[0052] like Figure 2 As shown, a pixel driving circuit 2 and a plurality of microstructures 1 are provided at the intersection of the scan line 23 and the data line 24. Figure 3 As shown, it includes a first transistor 9, a second transistor 10, a common electrode 27, a pixel electrode 11 and a microstructure 1, wherein the microstructure 1 can be as shown in FIG. Figure 1 The microstructure shown in 1. Figure 3 As shown, the first transistor 9 and the second transistor 10 are used to drive the microstructure 1 connected to the pixel driving circuit 2 according to the driving signal and the data signal. In the embodiment of the present disclosure, the common electrode 27 can be multiple or single. In the embodiment of the present disclosure, the pixel electrode 11 and the common electrode 27 can be arranged relative to each other. It can also be as follows Figure 4 As shown, the substrate may be provided together with Figure 5 As shown, the stack is provided on the substrate, and the above three situations are all within the scope of protection of the embodiments of the present disclosure. In the embodiments of the present disclosure, according to the image to be displayed, a driving signal is input to the pixel electrode 11 corresponding to the pixel displaying the corresponding color, so that the charged particles in the microstructure 1 move under the action of the electric field between the pixel electrode 11 and the common electrode 27, so that the pixel corresponding to the pixel electrode 11 displays the corresponding color.

[0053] against Figure 1-5 The electronic paper display device shown, Figure 6 FIG. 1 is a schematic diagram of a driving method according to an embodiment of the present disclosure. Figure 6 As shown, an embodiment of the present disclosure provides a driving method for an electronic paper display device, the method comprising:

[0054] S100: According to the image to be displayed, the pixel electrode 11 of the pixel driving circuit 2 corresponding to the pixel that needs to display black is input with a first driving signal 01; the pixel electrode 11 of the pixel driving circuit 2 corresponding to the pixel that needs to display white is input with a second driving signal 02. The waveforms of the first driving signal 01 and the second driving signal 02 are as follows: Figure 7 As shown. The driving stage of the electronic paper display device includes a first uniformization stage S1, and the first uniformization stage S1 includes a first sub-uniformization stage S11, a second sub-uniformization stage S12, a third sub-uniformization stage S13, and a fourth sub-uniformization stage S14. In the fourth sub-uniformization stage S14, the first driving signal 01 includes a first sub-driving signal 011, and the first sub-driving signal 011 has an opposite electrical property to the black particles 4. In the fourth sub-uniformization stage S14, the second driving signal 02 includes a second sub-driving signal 021, and the second sub-driving signal 021 has an opposite electrical property to the white particles 5. In some embodiments, the microstructure 1 includes a microcup structure and a microcapsule structure. In the embodiments of the present disclosure, Figure 1 The microcapsule structure shown is explained.

[0055] In the disclosed embodiment, the common electrodes 27 in each microstructure 1 are electrically connected. In this case, the voltage signal applied to each common electrode 27 is the same. In this case, the common electrode 27 is referred to as the Vcom electrode. The pixel electrodes 11 in each pixel driving circuit are input with the first drive signal O1 or the second drive signal O2. During the first uniformization stage S1, the voltage of the Vcom electrode is 0V. Therefore, the voltage between the pixel electrode 11 corresponding to each microstructure 1 and the common electrode 27 is the first drive signal O1 or the second drive signal O2 on the pixel electrode 11. Therefore, during the first uniformization stage S1, the movement of the black particles 4, white particles 5, and red particles 6 in the microstructure 1 can be controlled according to the drive signal on the pixel electrode 11.

[0056] like Figure 8 As shown, the first uniformization stage S1 consists of a first sub-uniformization stage S11 through a fourth sub-uniformization stage S14, with sequential driving times. The starting driving times of the first sub-uniformization stage S11, the second sub-uniformization stage S12, the third sub-uniformization stage S13, and the fourth sub-uniformization stage S14 increase in sequence. The sub-drive signals in the first drive signal O1 or the second drive signal O2 can have different driving voltages and driving durations in different sub-uniformization stages of the first sub-uniformization stage S11.

[0057] In the embodiment of the present disclosure, the first sub-drive signal 011 in the first drive signal 01 is input to the pixel electrode 11 corresponding to the pixel displaying black in the fourth sub-homogenization stage S14. Since the Vcom voltage on the common electrode 27 is 0V, the electric field in the microstructure 1 corresponding to the pixel displaying black depends on the voltage on the first sub-drive signal 011. Since the electrical property of the black particles 4 of the present disclosure is positive, the electrical property of the first sub-drive signal 011 is opposite to that of the black particles 4, and therefore the first sub-drive signal 011 is a drive signal with a negative voltage. Specifically, Figure 8 As shown, the first sub-drive signal O11 is a square wave signal with a voltage of -15V and a duration of t114. In this manner, because the first sub-drive signal O11 is a square wave signal with a voltage of -15V and a duration of t114 during the fourth sub-equalization stage S14 (the last stage of the first equalization stage S1), at the end of the first equalization stage S1, the positively charged black particles 4 and red particles 6 in the microstructure 1 corresponding to the pixel displaying black are all oriented away from the light-emitting side. This prevents the black microstructure 1 from being doped with red particles 6 during imaging, thus preventing the occurrence of red afterimages in black images.

[0058] In the embodiment of the present disclosure, Figure 8 As shown, the second sub-driving signal 021 in the second driving signal 02 is input to the pixel electrode 11 corresponding to the pixel displaying white in the fourth sub-homogenization stage S14. Since the Vcom voltage on the common electrode 27 is 0V, the electric field in the microstructure 1 displaying white is the voltage on the second sub-driving signal 021. Since the electrical property of the white particles 5 disclosed in the present invention is negative, the electrical property of the second sub-driving signal 021 is opposite to that of the white particles 5, and therefore the second sub-driving signal 021 is a driving signal with a positive voltage. Specifically, Figure 8 As shown, the second sub-drive signal O21 is a square wave signal with a voltage of +15V and a duration of t214. In this manner, because the second sub-drive signal O21 is a square wave signal with a voltage of +15V and a duration of t214 during the fourth sub-equalization stage S14 (the last stage of the first equalization stage S1), at the end of the first equalization stage S1, all of the negatively charged white particles 5 in the microstructure 1 corresponding to the white pixel are oriented away from the light-emitting side. This prevents the white microstructure 1 from being doped with red particles 6 during imaging, and prevents the occurrence of red afterimages in black images.

[0059] In some embodiments, the driving method of the electronic paper display device disclosed herein further includes: inputting a third driving signal O3 to the pixel electrode 11 in the pixel driving circuit 2 corresponding to the pixel displaying the color according to the image to be displayed. The driving stage of the electronic paper display device includes a first uniformization stage S1, and the first uniformization stage S1 includes a first sub-uniformization stage S11, a second sub-uniformization stage S12, a third sub-uniformization stage S13, and a fourth sub-uniformization stage S14. The waveform of the third driving signal O3 is as follows: Figure 7 In the fourth sub-uniformization stage S14, the third driving signal 03 includes a third sub-driving signal 031. The third sub-driving signal 031 has an electrical property opposite to that of the color particles.

[0060] In the embodiment of the present disclosure, the common electrodes 27 in each microstructure 1 are electrically connected together. In this case, the voltage signal applied to each common electrode 27 is the same. At this time, the common electrode 27 is a common electrode (also referred to as a Vcom electrode), and the pixel electrode 11 corresponding to the pixel displaying red is input with the third drive signal 03. The first uniformization stage S1 in this embodiment and the sub-uniformization stages included therein are the same as those in the above-mentioned embodiment, so they will not be repeated here. Similarly, the voltage of the Vcom electrode is 0V, so the voltage between the pixel electrode 11 corresponding to each microstructure 1 displaying red and the common electrode 27 is the third drive signal 03 on the pixel electrode 11. Therefore, in the first uniformization stage S1, the movement of the black particles 4, white particles 5 and red particles 6 in the microstructure 1 can be controlled according to the third drive signal 03 on the pixel electrode 11.

[0061] In the embodiment of the present disclosure, Figure 8 As shown, the third sub-drive signal 031 in the third drive signal 03 is input to the pixel electrode 11 corresponding to the pixel displaying red in the fourth sub-homogenization stage S14. Since the Vcom voltage on the common electrode 27 is 0V, the electric field in the microstructure 1 corresponding to the red pixel is the voltage on the third sub-drive signal 031. Since the electrical property of the red particles 6 disclosed in the present invention is positive, the electrical property of the third sub-drive signal 031 is opposite to that of the red particles 6, so the first sub-drive signal 011 is a drive signal with a negative voltage. Figure 8As shown, the third sub-drive signal O31 is a square wave signal with a voltage of +15V and a duration of t314. In this manner, because the third sub-drive signal O31 is a square wave signal with a voltage of +15V and a duration of t314 during the fourth sub-equalization stage S14 (the last stage of the first equalization stage S1), at the end of the first equalization stage S1, all the positively charged black particles 4 and red particles 6 in the microstructure 1 corresponding to the red pixel are oriented away from the light-emitting side. This prevents the black particles 4 from being incorporated into the red microstructure 1 during imaging, thus preventing the occurrence of black afterimages in red images.

[0062] It should be noted that since the first sub-drive signal 011, the second sub-drive signal 021, and the third sub-drive signal 031 are all in the fourth sub-homogenization stage S14, the duration t114 of the first sub-drive signal 011, the duration t214 of the second sub-drive signal 021, and the duration t314 of the third sub-drive signal 031 are the same, all being ΔT*N, where ΔT is determined by the period of the drive signal, and N is a constant set as needed. In the embodiment of the present disclosure, the period of each drive signal is 50 Hz, so ΔT = 0.02 s, and N is set to 5 as needed. Therefore, the durations of the first sub-drive signal 011, the second sub-drive signal 021, and the third sub-drive signal 031 in the embodiment of the present disclosure are all 5*0.02 s, or 0.10 s.

[0063] Continue to refer to Figure 8In some embodiments, the first uniformization stage S1 includes a first sub-uniformization stage S11, a second sub-uniformization stage S12, a third sub-uniformization stage S13, and a fourth sub-uniformization stage S14. The first drive signal O1 also includes a nineteenth sub-drive signal O17 in the first sub-uniformization stage S11 and the second sub-uniformization stage S12, and a twentieth sub-drive signal O18 in the third sub-uniformization stage S13. The second drive signal O2 also includes a twenty-first sub-drive signal O27 in the first sub-uniformization stage S11 and the second sub-uniformization stage S12, and a twenty-second sub-drive signal O28 in the third sub-uniformization stage S13. The third drive signal O3 also includes a twenty-third sub-drive signal O37 in the first sub-uniformization stage S11 and the second sub-uniformization stage S12, and a twenty-fourth sub-drive signal O38 in the third sub-uniformization stage S13. The nineteenth sub-driving signal 017, the twenty-first sub-driving signal 027, and the twenty-third sub-driving signal 037 all include pulse signals with alternating positive and negative voltages. The positive voltage duration of the pulse signals in the nineteenth sub-driving signal 017, the twenty-first sub-driving signal 027, and the twenty-third sub-driving signal 037 is shorter than the negative voltage duration. The nineteenth sub-driving signal 017, the twenty-first sub-driving signal 027, and the twenty-third sub-driving signal 037 all include pulse signals with alternating positive and negative voltages.

[0064] In the disclosed embodiment, the Vcom voltage of each common electrode 27 is also 0V. Therefore, the driving voltage of the pixel electrode 11 corresponding to each microstructure 1 is the voltage within the microcapsule. Furthermore, since the first uniformization stage S1 consists of a first sub-uniformization stage S11, a second sub-uniformization stage S12, a third sub-uniformization stage S13, and a fourth sub-uniformization stage S14, each of which has a continuous driving time, and the starting driving times of the first sub-uniformization stage S11, the second sub-uniformization stage S12, the third sub-uniformization stage S13, and the fourth sub-uniformization stage S14 increase in sequence, in the disclosed embodiment, the 20th sub-driving signal 018 occurs after the 19th sub-driving signal 017. Similarly, the 22nd sub-driving signal 028 occurs after the 21st sub-driving signal 027, and the 24th sub-driving signal 038 occurs after the 23rd sub-driving signal 037.

[0065] like Figure 8As shown, the nineteenth sub-drive signal 017 in the first drive signal 01, which is an alternating positive and negative pulse signal during the first sub-equalization stage S11 and the second sub-equalization stage S12, is input to the pixel electrode 11 corresponding to the pixel displaying black. Since the voltage of the common electrode 27 is 0V, the electric field in the microstructure 1 corresponding to the pixel displaying black is the voltage of the nineteenth sub-drive signal 017. Specifically, the voltage of the nineteenth sub-drive signal 017 during the first sub-equalization stage S11 is a first voltage, i.e., +15V, a square wave signal with a duration of t111. The voltage of the nineteenth sub-drive signal 017 during the second sub-equalization stage S12 is a second voltage, i.e., -15V, a square wave signal with a duration of t112. Therefore, driven by the nineteenth sub-drive signal 017, in the first sub-equalization stage S11, the black particles 4 are closer to the display side relative to the white particles 5 and the colored particles; and in the second sub-equalization stage S12, the white particles 5 are closer to the display side relative to the black particles 4 and the colored particles. In this manner, the white particles 5, red particles 6, and black particles 4 in the black microstructure 1 are subjected to sufficient oscillation motion in the first sub-homogenization stage S11 and the second sub-homogenization stage S12 to separate the particles of different colors, thereby reducing mutual interference between the particles before imaging. This prevents the black microstructure 1 from being mixed with particles of other colors during imaging, thereby preventing the occurrence of afterimages in the displayed black image.

[0066] Similarly, the twenty-first sub-drive signal 027 in the second drive signal 02, which alternates between positive and negative pulse signals during the first sub-equalization stage S11 and the second sub-equalization stage S12, is input to the pixel electrode 11 corresponding to the pixel displaying white. Since the voltage of the common electrode 27 is 0V, the electric field in the microstructure 1 corresponding to the pixel displaying white is the voltage of the nineteenth sub-drive signal 017. Specifically, the voltage of the twenty-first sub-drive signal 027 during the first sub-equalization stage S11 is a first voltage, i.e., +15V, a square wave signal with a duration of t211. The voltage of the twenty-first sub-drive signal 027 during the second sub-equalization stage S12 is a second voltage, i.e., -15V, a square wave signal with a duration of t212. Therefore, driven by the twenty-first sub-drive signal 027, in the first sub-equalization stage S11, the black particles 4 are closer to the display side relative to the white particles 5 and the colored particles; and in the second sub-equalization stage S12, the white particles 5 are closer to the display side relative to the black particles 4 and the colored particles. In this manner, the white particles 5, red particles 6, and black particles 4 in the microstructure 1 displaying white are subjected to sufficient oscillation motion in the first sub-homogenization stage S11 and the second sub-homogenization stage S12 to separate the particles of different colors, thereby reducing mutual interference between the particles before imaging. This prevents the microstructure 1 corresponding to the white pixel from being mixed with particles of other colors during imaging, thereby preventing the occurrence of afterimages in the displayed white image.

[0067] Similarly, the twenty-third sub-drive signal 037 in the third drive signal 03, a pulse signal with alternating positive and negative voltages during the first sub-equalization stage S11 and the second sub-equalization stage S12, is input to the pixel electrode 11 corresponding to the pixel displaying red. Since the voltage of the common electrode 27 is 0V, the electric field in the microstructure 1 displaying red is the voltage of the nineteenth sub-drive signal 017. Specifically, the voltage of the twenty-first sub-drive signal 027 during the first sub-equalization stage S11 is a first voltage, i.e., +15V, a square wave signal with a duration of t311. The voltage of the twenty-first sub-drive signal 027 during the second sub-equalization stage S12 is a second voltage, i.e., -15V, a square wave signal with a duration of t312. Therefore, driven by the twenty-third sub-drive signal 037, during the first sub-equalization stage S11, the black particles 4 are closer to the display side relative to the white particles 5 and the colored particles; and during the second sub-equalization stage S12, the white particles 5 are closer to the display side relative to the black particles 4 and the colored particles. In this manner, the white particles 5, red particles 6, and black particles 4 in the red microstructure 1 are subjected to sufficient oscillation motion in the first sub-homogenization stage S11 and the second sub-homogenization stage S12 to separate the particles of different colors, thereby reducing mutual interference between the particles before imaging. This prevents the red microstructure 1 from being mixed with particles of other colors during imaging, thereby preventing the occurrence of afterimages in the red image.

[0068] In the embodiment of the present disclosure, each driving signal in the third sub-homogenization stage S13 further includes a twentieth sub-driving signal 018, a twenty-second sub-driving signal 028, and a twenty-fourth sub-driving signal 038. Figure 8 As shown, during the third sub-equalization stage S13, the voltages of the 20th, 22nd, and 24th sub-drive signals 018, 028, and 038 are all square wave signals of the second voltage, i.e., -15V, with durations t113, t213, and t313, respectively. Therefore, driven by the 20th, 22nd, and 24th sub-drive signals 018, 028, and 038, the white particles 5 in each microstructure 1 are moved closer to the display side relative to the black particles 4 and colored particles during the third sub-equalization stage S13. In this way, after the particles are oscillated during the first and second sub-equalization stages S11 and S12, the entire image is whitened to facilitate the subsequent driving process.

[0069] It should be noted that, since the positive voltages in the nineteenth, twenty-first, and twenty-third sub-drive signals O17, O27, and O37 are all in the first sub-equalization stage S11, their durations t111, t211, and t311 in the first sub-equalization stage S11 are identical. Similarly, the durations t112, t212, and t312 of the negative voltages in the nineteenth, twenty-first, and twenty-third sub-drive signals O17, O27, and O37 in the second sub-equalization stage S12 are identical. The durations t113, t213, and t313 of the twentieth, twenty-second, and twenty-fourth sub-drive signals O18, O28, and O38 in the third sub-equalization stage S13 are also identical. Similar to the above embodiment, the duration of each sub-stage is set by ΔT*N, where ΔT is determined by the period of the drive signal and N is a constant set manually as needed. In the embodiment of the present disclosure, N of t111, t211, and t311 in the first sub-uniformization stage S11 is set to 4, so the positive voltage duration in the nineteenth sub-driving signal 017, the twenty-first sub-driving signal 027, and the twenty-third sub-driving signal 037 in the first sub-uniformization stage S11 is 4*0.02, that is, 0.08s; N of t112, t212, and t312 in the second sub-uniformization stage S12 is set to 6, so in the first sub-uniformization stage S11 The duration of the negative voltage in the nineteenth sub-driving signal O17, the twenty-first sub-driving signal O27, and the twenty-third sub-driving signal O37 in the first sub-homogenizing stage S11 is 6*0.02, that is, 0.12 s. N in t113, t213, and t313 of the third sub-homogenizing stage S13 is set to 24. Therefore, the duration of the twentieth sub-driving signal O18, the twenty-second sub-driving signal O28, and the twenty-fourth sub-driving signal O38 in the first sub-homogenizing stage S11 is 24*0.02, that is, 0.48 s.

[0070] It should also be noted that in the first homogenization stage S1, the first sub-stage S11 and the second sub-stage S12 can be cycled as a pair, and the third sub-stage S13 and the fourth sub-stage S14 can be cycled as a pair. For example, in the embodiment of the present disclosure, after the second sub-stage S12 is completed, the first sub-stage S11 is repeated according to a preset number of cycles, and the number of repetitions can be M. In the embodiment of the present application, M can be set to 48, that is, after the first sub-stage S11 and the second sub-stage S12 are repeated forty-eight times, the third sub-stage S13 and the fourth sub-stage S14 are entered. Similarly, the third sub-stage S13 and the fourth sub-stage S14 can be repeated, but in the embodiment of the present application, they are repeated only once. The first homogenization stage S1 is completed only after each sub-stage in the first homogenization stage S1 is repeated. In this way, the first homogenization stage S1 allows the black particles 4, white particles 5 and red particles 6 in the microstructure 1 to fully oscillate so as to separate particles showing different colors, reduce mutual interference before imaging, and prevent the occurrence of afterimages.

[0071] In some embodiments, as Figure 9 As shown, the driving phase of the electronic paper display device also includes a second uniformization phase S2, which precedes the first uniformization phase. The first drive signal 01 also includes a fourth sub-drive signal 012 in the second uniformization phase S2, the second drive signal 02 also includes a fifth sub-drive signal 022 in the second uniformization phase S2, and the third drive signal 03 also includes a sixth sub-drive signal 032 in the second uniformization phase S2. The fourth sub-drive signal 012, the fifth sub-drive signal 022, and the sixth sub-drive signal 032 include a first voltage and a second voltage. The effective duration of the second voltage is greater than the effective duration of the first voltage.

[0072] In the embodiment of the present disclosure, the Vcom voltage of the common electrode 27 corresponding to each microstructure 1 is 0V, and the voltage on the pixel electrode 11 corresponding to each microstructure 1 is the voltage of the driving signal thereon. Figure 9As shown, the second uniformization stage S2 includes a fifth sub-uniformization stage, a sixth sub-uniformization stage, a seventh sub-uniformization stage, and an eighth sub-uniformization stage, each of which has a continuous driving time. The starting times of the fifth sub-uniformization stage, the sixth sub-uniformization stage, the seventh sub-uniformization stage, and the eighth sub-uniformization stage increase in sequence. The fourth sub-driving signal O12 in the first driving signal O1, the fifth sub-driving signal O22 in the second driving signal, and the sixth sub-driving signal O32 in the third driving signal O3 are respectively input to the pixel electrodes 11 corresponding to the pixels displaying black, white, and red. Since the Vcom voltage on the common electrode 27 is 0V, the electric field in each microstructure 1 is the voltage of each sub-driving signal.

[0073] Reference Figure 9 As shown, the voltages of the fourth sub-driving signal 012, the fifth sub-driving signal 022, and the sixth sub-driving signal 032 in the fifth, sixth, and seventh sub-equalization stages are the second voltage, i.e., square wave signals of -15V. The durations are as follows: the driving time of the fourth sub-driving signal 012 in the fifth, sixth, and seventh sub-equalization stages are t121, t122, and t123, respectively; the driving time of the fifth sub-driving signal 022 in the fifth, sixth, and seventh sub-equalization stages are t221, t222, and t223, respectively; and the driving time of the sixth sub-driving signal 032 in the fifth, sixth, and seventh sub-equalization stages are t321, t322, and t323, respectively. In this manner, the voltage of each driving signal in the fifth, sixth, and seventh sub-equalization stages is the second voltage, i.e., -15 V. Therefore, each driving signal drives the white particles 5 closer to the display side relative to the black particles 4 and the colored particles.

[0074] Continue to refer to Figure 9The voltages of the fourth sub-drive signal 012, the fifth sub-drive signal 022, and the sixth sub-drive signal 032 in the eighth sub-equalization stage are the first voltage, i.e., +15V square wave signals. The durations are as follows: the fourth sub-drive signal 012 in the eighth sub-equalization stage is driven for time t124; the fifth sub-drive signal 022 in the eighth sub-equalization stage is driven for time t224; and the sixth sub-drive signal 032 in the eighth sub-equalization stage is driven for time t324. In this manner, the voltages of each drive signal in the eighth sub-equalization stage are the first voltage, i.e., +15V. Therefore, each drive signal drives the black particles 4 closer to the display side relative to the white particles 5 and the colored particles. At this time, by controlling the duration of each driving signal in the second uniformization stage S2, it is possible to achieve an oscillating motion of the black particles 4, white particles 5, and red particles 6 in the microstructure 1 by making the microstructure 1 display white for a long time and black for a short time in the second uniformization stage S2, so that the particles displaying different colors are fully separated, thereby reducing the mutual interference between the particles displaying different colors before driving imaging.

[0075] Specifically, the time when the white particles 5 in the microstructure 1 corresponding to the pixel displaying black are closer to the display side relative to the black particles 4 and the colored particles is t121, t122, and t123, and the time when the black particles 4 are closer to the display side relative to the white particles 5 and the colored particles is t124. By controlling the sum of t121, t122, and t123 to be greater than t124, it is possible to achieve that the time when the white particles 5 in the microstructure 1 corresponding to the pixel displaying black are closer to the display side relative to the black particles 4 and the colored particles is greater than the time when the black particles 4 are closer to the display side relative to the white particles 5 and the colored particles. Figure 6 The waveforms of the fourth sub-driving signal 012, the fifth sub-driving signal 022 and the sixth sub-driving signal 032 are the same. Therefore, the manner in which the time for the white particles 5 to approach the display side relative to the black particles 4 and the colored particles in the microstructure 1 corresponding to the pixel displaying white and the microstructure 1 corresponding to the pixel displaying red is greater than the time for the black particles 4 to approach the display side relative to the white particles 5 and the colored particles is the same as the manner in the microstructure 1 corresponding to the pixel displaying black, and no further details are given here.

[0076] It should also be noted that, as described in the above embodiment, the durations of the same sub-stage are substantially identical and can be calculated as ΔT*N, where ΔT is determined by the period of the drive signal and N is a constant set manually as needed. N is the same for each sub-stage. Therefore, the duration of each drive signal in each sub-stage is controlled. Specifically, N for the fourth sub-drive signal O12, the fifth sub-drive signal O22, and the sixth sub-drive signal O32 in the fifth, sixth, and seventh sub-evenization stages is set to 7. The specific drive durations t121, t221, and t321 are all 7*0.02s, or 0.14s. Similarly, N for the fourth sub-drive signal O12, the fifth sub-drive signal O22, and the sixth sub-drive signal O32 in the eighth sub-evenization stage is set to 3. The specific drive durations t124, t224, and t324 are all 3*0.02s, or 0.06s. Therefore, it is obvious that at this time, the time that the white particles 5 in each microstructure 1 are close to the display side relative to the black particles 4 and the colored particles is greater than the time that the black particles 4 are close to the display side relative to the white particles 5 and the colored particles. By making the microstructure 1 display white for a long time and black for a short time, the black particles 4, white particles 5 and red particles 6 in the microstructure 1 are subjected to oscillating motion, so that the particles displaying different colors are fully separated, so as to reduce the mutual interference between the particles displaying different colors before driving imaging. At the same time, after completing a second uniformization stage S2, the second uniformization stage S2 can be repeated. The total number of executions of the second uniformization stage S2 can be set to M, where M is a natural number. For example, in the embodiment of the present application, M can be set to 7. In this way, the second uniformization stage S2 is executed multiple times, so that the uniformization effect after the oscillating motion of the particles in the microstructure 1 is better, and it is less likely to have afterimages when the microstructure 1 is imaged. In this embodiment, the second homogenization stage S2 is before the first homogenization stage S1. In this way, the particles in the microstructure 1 are preliminarily oscillated in the second homogenization stage S2 to homogenize the particles in the microstructure 1 before the first homogenization stage S1 is executed, so that the effect of executing the first homogenization stage S1 is better.

[0077] In some embodiments, as Figure 10As shown, the driving stage of the electronic paper display device further includes a third uniformization stage S3, which is between the second uniformization stage S2 and the first uniformization stage S1. The first driving signal 01 further includes a seventh sub-driving signal 013 in the third uniformization stage S3, the second driving signal 02 further includes an eighth sub-driving signal 023 in the third uniformization stage S3, and the third driving signal 03 further includes a ninth sub-driving signal 033 in the third uniformization stage S3. The seventh sub-driving signal 013, the eighth sub-driving signal 023, and the ninth sub-driving signal 033 all include pulse signals with alternating positive and negative voltages.

[0078] In the embodiment of the present disclosure, the Vcom voltage of the common electrode 27 corresponding to each microcapsule is also 0V, so the driving voltage of the pixel electrode 11 corresponding to each microcapsule is the field strength of the electric field inside the microcapsule. Figure 10 As shown, in the third uniformization stage S3, the seventh sub-driving signal 013, the eighth sub-driving signal 023, and the ninth sub-driving signal 033 are input to the pixel electrodes 11 corresponding to the pixels displaying black, white, and red, respectively. Since the seventh sub-driving signal 013, the eighth sub-driving signal 023, and the ninth sub-driving signal 033 all include pulse signals with alternating positive and negative voltages, the positive voltage of the pulse signal is the first voltage, i.e., +15V, and the negative voltage is the second voltage, i.e., -15V, and as shown in FIG. Figure 7 As shown, the waveforms of the seventh sub-driving signal 013 , the eighth sub-driving signal 023 and the ninth sub-driving signal 033 are the same.

[0079] In this manner, when the seventh, eighth, and ninth sub-drive signals 013, 023, and 033 are positive, the black particles 4 are driven toward the display side relative to the white particles 5 and the colored particles, resulting in a black image. When the seventh, eighth, and ninth sub-drive signals 013, 023, and 033 are negative, the white particles 5 are driven toward the display side relative to the black particles 4 and the colored particles, resulting in a white image. Because the positive and negative voltages alternate, each microstructure 1 switches between displaying black and white. In other words, the black and white particles 4, 5 within each microstructure 1 are fully in motion during the third homogenization stage S3. Therefore, in this manner, the white particles 5, red particles 6, and black particles 4 within each microstructure 1 are fully oscillating during the third homogenization stage S3, separating the particles of different colors and reducing interference between the particles before imaging. This prevents contamination of the microstructure 1 with particles of other colors during imaging, thus preventing image sticking in the displayed image.

[0080] In some embodiments, the duration of the negative voltage in the aforementioned pulse signal is greater than the duration of the positive voltage. Because the black particles 4 in each microstructure 1 move faster than the white particles 5, the duration of the negative voltage can be set to be greater than the duration of the positive voltage to balance the time the black particles 4 are on the display side relative to the white particles 5 and red particles 6, and the time the white particles 5 are on the display side relative to the black particles 4 and red particles 6. This ensures a more balanced oscillation of the black and white particles 4, 5 within the microstructure 1, reduces mutual interference between the particles before imaging, and prevents the microstructure 1 from being mixed with particles of other colors during imaging, thereby preventing the occurrence of afterimages in the displayed image.

[0081] It should be noted that since the seventh sub-drive signal 013, the eighth sub-drive signal 023, and the ninth sub-drive signal 033 are all in the third equalization stage S3, the third equalization stage S3 can be divided into four consecutive sub-stages with different start and end times, similar to the first equalization stage S1 and the second equalization stage S2 described above. For the alternating positive and negative pulse signals in the seventh sub-drive signal 013, the eighth sub-drive signal 023, and the ninth sub-drive signal 033, the positive and negative voltages can be arranged to alternate in successive sub-stages. For example, the positive voltage is in the first sub-stage, the negative voltage is in the second sub-stage, the positive voltage is in the third sub-stage, and the negative voltage is in the fourth sub-stage. This approach facilitates the driving of the drive signal.

[0082] As with the sub-stages in the first and second uniformization stages S1 and S2 described above, the durations of the drive signals in the same sub-stages in the third uniformization stage S3 are the same. Therefore, the durations of the sub-stages in the seventh sub-drive signal O13 are t131, t132, t133, and t134, respectively; the durations of the sub-stages in the eighth sub-drive signal O23 are t231, t232, t233, and t234, respectively; and the durations of the sub-stages in the ninth sub-drive signal O33 are t331, t332, t333, and t334, respectively. Where t131 and t133 are the duration of the positive voltage (+15V) in the seventh sub-signal, and t132 and t134 are the duration of the negative voltage (-15V) in the seventh signal. Similarly, t231 and t233 are the duration of the positive voltage (+15V) in the eighth sub-signal, and t232 and t234 are the duration of the negative voltage (-15V) in the eighth signal. Similarly, t331 and t333 are the duration of the positive voltage (+15V) in the eighth sub-signal, and t332 and t334 are the duration of the negative voltage (-15V) in the eighth signal. As in the above embodiment, the duration of each sub-stage is set by ΔT*N, where ΔT is determined by the period of the drive signal and N is a constant set manually as needed. N is the same for the same sub-stage. In an embodiment of the present application, N can be set to 5 for the stage in which the drive signal is a positive voltage and to 6 for the stage in which the drive signal is a negative voltage. The duration of the subphase at positive voltage is therefore 5*0.02 s, ie 0.1 s, and the duration of the subphase at negative voltage is 6*0.02 s, ie 0.12 s.

[0083] Meanwhile, the third homogenization stage S3 in the embodiment of the present disclosure is similar to the second homogenization stage S2 described above. After completing one third homogenization stage S3, the third homogenization stage S3 can be repeated. The total number of executions of the third homogenization stage S3 can be set to M, where M is a natural number. For example, in the embodiment of the present application, M can be set to 32. In this manner, multiple executions of the third homogenization stage S3 can achieve a better homogenization effect after the oscillating motion of the particles in the microstructure 1, making it less likely that afterimages will occur during imaging of the electronic paper display device.

[0084] In some embodiments, as Figure 11As shown, the driving phase of the electronic paper display device also includes a balancing phase S4, which occurs after the first homogenization phase S1. The first drive signal 01 also includes a thirteenth sub-drive signal 015 during the balancing phase S4, the second drive signal 02 also includes a fourteenth sub-drive signal 025 during the balancing phase S4, and the third drive signal 03 also includes a fifteenth sub-drive signal 035 during the balancing phase S4. The thirteenth sub-drive signal 015 and the fourteenth sub-drive signal 025 can drive the white particles 5 in the microstructure 1 back to their initial positions, while the fifteenth sub-drive signal 035 can drive the white particles 5 and the colored particles in the microstructure 1 back to their initial positions.

[0085] In the embodiment of the present disclosure, the Vcom voltage of the common electrode 27 corresponding to each microstructure 1 is 0V, so the voltage on the pixel electrode 11 corresponding to each microstructure 1 is the voltage of the driving signal thereon, and the field strength of the electric field in each microstructure 1 is the voltage of the driving signal input to its pixel electrode 11. Figure 11 As shown, in the balancing stage S4, the thirteenth sub-driving signal 015, the fourteenth sub-driving signal 025 and the fifteenth sub-driving signal 035 are input to the pixel electrodes 11 corresponding to the pixels displaying black, white and red respectively. Figure 11 As shown, the thirteenth sub-drive signal 015 sequentially includes the Vcom voltage, the first voltage, the Vcom voltage, and the Vcom voltage; the fourteenth sub-drive signal 025 sequentially includes the first voltage, the Vcom voltage, the Vcom voltage, and the Vcom voltage. These voltages are sequentially present in the sub-stages of the balancing stage S4. Similar to the first and second uniformization stages S1 and S2, the sub-stages of the balancing stage S4 consist of four consecutive sub-stages with different start and end times. Because the balancing stage S4 follows the first uniformization stage S1, the first voltage in the thirteenth sub-drive signal 015 and the fourteenth sub-drive signal 025 pushes the negatively charged white particles 5, which were pushed during the first, second, and third uniformization stages S1, S2, and S3, toward the side away from the light-emitting side, returning to their initial positions. This prevents the white particles 5, black particles 4, and red particles 6 in the microstructure 1 that is required to display black and white in the display image from generating a built-in electric field due to electric field imbalance, which in turn leads to polarization.

[0086] Similarly, continue to refer to Figure 11The fifteenth sub-drive signal 035 in the balancing stage S4 includes the Vcom voltage, the Vcom voltage, the first voltage, and the second voltage, where these voltages are sequentially present in each sub-stage of the balancing stage S4. Because the balancing stage S4 occurs after the first uniformization stage S1, the first and second voltages in the fifteenth sub-drive signal 035 cause the negatively charged white particles 5 and the positively charged red particles 6, which were over-propelled during the first uniformization stage S1, the second uniformization stage S2, and the third uniformization stage S3, to move and return to their initial positions. This prevents the white particles 5, black particles 4, and red particles 6 in the microstructure 1 that is required to display black and white on the display screen from generating a built-in electric field due to electric field imbalance, which in turn leads to polarization.

[0087] It should be noted that, as shown in the sub-stages of the first and second uniformization stages S1 and S2, the durations of the drive signals in the same sub-stages in the balancing stage S4 are the same. Therefore, the durations of the sub-stages in the thirteenth sub-drive signal 015 are t141, t142, t143, and t144, respectively; the durations of the sub-stages in the fourteenth sub-drive signal 025 are t241, t242, t243, and t244, respectively; and the durations of the sub-stages in the fifteenth sub-drive signal 035 are t341, t342, t343, and t344, respectively. Wherein, t142 is the positive voltage in the thirteenth sub-driving signal 015, that is, the duration of the +15V voltage; t141, t143, and t144 are the Vcom voltage in the thirteenth sub-driving signal 015, that is, the duration of the 0V voltage; t241 is the positive voltage in the fourteenth sub-driving signal 025, that is, the duration of the +15V voltage; t242, t143, and t144 are the Vcom voltage in the fourteenth sub-driving signal 025, that is, the duration of the 0V voltage; t343 is the positive voltage in the fifteenth sub-driving signal 035, that is, the duration of the +15V voltage; t344 is the negative voltage in the fifteenth sub-driving signal 035, that is, the duration of the -15V voltage; t341 and t342 are the Vcom voltage in the fourteenth sub-driving signal 025, that is, the duration of the 0V voltage.

[0088] As in the above embodiment, the duration of each sub-stage is set by ΔT*N, where ΔT is determined by the period of the drive signal and N is a constant set manually as needed. N in the same sub-stage is the same. N of each sub-stage is set to 50, 30, 39, and 8, respectively. Therefore, the values ​​of t141, t241, and t341 are 50*0.02, i.e., 1.00s; the values ​​of t142, t242, and t342 are 30*0.02, i.e., 0.60s; the values ​​of t143, t243, and t343 are 39*0.02, i.e., 0.78s; and the values ​​of t144, t244, and t344 are 8*0.02, i.e., 0.16s. By setting the duration of each sub-stage in this way, the balance stage S4 can have a better balance effect, thereby avoiding polarization of particles in each microstructure 1 and affecting the display.

[0089] At the same time, the balancing stage S4 in the embodiment of the present disclosure is similar to the first uniformization stage S1, the second uniformization stage S2, and the third uniformization stage S3 described above. After completing one balancing stage S4, the balancing stage S4 can be repeated. The total number of executions of the balancing stage S4 can be set to M, where M is a natural number. For example, in the embodiment of the present application, M can be set to 8. In this way, the balancing stage S4 is executed multiple times to achieve a better balancing effect on the particles in the microstructure 1. When imaging the microstructure 1, it is less likely that the charged particles will be polarized due to the built-in electric field, which would affect the imaging of the microstructure 1.

[0090] In some embodiments, as Figure 12 As shown, the driving stage of the electronic paper display device also includes a fourth uniformization stage S5, which is before the display stage of the microstructure 1; the first driving signal 01 also includes a tenth sub-driving signal 014 in the fourth uniformization stage S5, the second driving signal 02 also includes an eleventh sub-driving signal 024 in the fourth uniformization stage S5, and the third driving signal 03 also includes a twelfth sub-driving signal 034 in the fourth uniformization stage S5. The tenth sub-driving signal 014 and the eleventh sub-driving signal 024 include pulse signals with alternating negative and positive voltages. The twelfth sub-driving signal 034 is opposite to the pulse signal in the tenth sub-driving signal 014. The voltage of the common electrode 27 corresponding to the microstructure 1 includes a pulse signal with alternating negative and positive voltages, and is the same as the voltage of the pixel electrode 11 opposite thereto.

[0091] In the embodiment of the present disclosure, the common electrodes 27 in each microstructure 1 are electrically connected together. In this case, the voltage signal applied to each common electrode 27 is the same. Since in the fourth homogenization stage S5, the voltage of the common electrode 27 of the microstructure 1 includes a pulse signal with alternating positive and negative voltages, the electric field in the microstructure 1 should be the voltage difference between the pixel electrode 11 and the common electrode 27, that is, the driving signal voltage on the pixel electrode 11 cannot be equal to the voltage of the electric field in the microstructure 1. And since the tenth sub-driving signal 014 and the eleventh sub-driving signal 024 include pulse signals with alternating positive and negative voltages, specifically, as Figure 12 As shown, the tenth sub-drive signal 014 and the eleventh sub-drive signal 024 are drive signals of the second voltage, the first voltage, the second voltage, and the first voltage, respectively. Since the voltage of the common electrode 27 is a pulse signal that alternates between negative and positive, and is the same magnitude as the voltage of the pixel electrode 11 opposite it, the voltage of the common electrode 27 is also a drive signal of the second voltage, the first voltage, and the first voltage, respectively, arranged in that order. Therefore, in the fourth uniformization stage S5, although the pixel electrode 11 receives the first drive signal 01 and the second drive signal 02, the electrical signals of the common electrode 27 are completely consistent with those of the pixel electrode 11. Therefore, in the fourth uniformization stage S5, the black particles 4 and white particles 5 in the black and white microstructures 1 are approximately stationary. In this way, in the fourth uniformization stage S5, the red microstructure 1 is more effectively uniformized.

[0092] Continue to refer to Figure 12 Since the pulse signal in the twelfth sub-drive signal 034 is opposite to the pulse signal in the tenth sub-drive signal 014, the drive signals of the twelfth sub-drive signal 034 are sequentially the first voltage, the second voltage, the first voltage, and the second voltage. Since the voltage of the common electrode 27 at this stage is also the drive signal of the second voltage, the first voltage, and the second voltage arranged in sequence. Since the first voltage is +15V and the second voltage is -15V, the electric field in the microstructure 1 displaying red at this time is an AC pulse signal of ±30V. In this way, the particles in the microstructure 1 displaying red are oscillated using a large AC voltage, so that the white particles 5, red particles 6, and black particles 4 in the display are fully oscillated in the fourth uniformization stage S5, separating the particles of different colors and reducing mutual interference between the particles before imaging. This ensures that the particles of various colors are more evenly distributed when the color electronic paper is displayed.

[0093] It should be noted that since the tenth sub-drive signal 014, the eleventh sub-drive signal 024, and the twelfth sub-drive signal 034 of the first drive signal 01, the second drive signal 02, and the third drive signal 03 are all in the fourth equalization stage S5, the fourth equalization stage S5 can be divided into four consecutive sub-stages with different start and end times, similar to the first equalization stage S1, the second equalization stage S2, and the third equalization stage S3 described above. The alternating first and second voltages of the tenth sub-drive signal 014, the eleventh sub-drive signal 024, and the twelfth sub-drive signal 034 can be arranged to alternately exist in consecutive sub-stages. For example, the tenth sub-drive signal 014 may have the second voltage in the first sub-stage of the fourth equalization stage S5, the first voltage in the second sub-stage of the fourth equalization stage S5, the second voltage in the third sub-stage of the fourth equalization stage S5, and the first voltage in the fourth sub-stage of the fourth equalization stage S5. The corresponding relationship between the eleventh sub-driving signal 024 , the twelfth sub-driving signal 034 and the signal on the second voltage and each sub-phase is the same as that of the tenth sub-driving signal 014 , and will not be repeated here.

[0094] Similar to the sub-stages in the first, second, and third uniformization stages S1, S2, and S3, the durations of the drive signals in the same sub-stages in the fourth uniformization stage S5 are the same. Therefore, the durations of the sub-stages in the tenth sub-drive signal O14 are t151, t152, t153, and t154, respectively; the durations of the sub-stages in the eleventh sub-drive signal O24 are t251, t252, t253, and t254, respectively; and the durations of the sub-stages in the twelfth sub-drive signal O34 are t351, t352, t353, and t354, respectively. Where t151 and t153 are the duration of the second voltage in the tenth sub-signal, i.e., -15V, and t152 and t154 are the duration of the first voltage in the tenth signal, i.e., +15V. Similarly, t251 and t253 are the duration of the second voltage in the eleventh sub-signal, i.e., -15V, and t252 and t254 are the duration of the first voltage in the eleventh signal, i.e., +15V. Similarly, t331 and t333 are the duration of the first voltage in the twelfth sub-signal, i.e., +15V, and t332 and t334 are the duration of the second voltage in the twelfth sub-signal, i.e., -15V. Similar to the above embodiment, the duration of each sub-stage is set by ΔT*N, where ΔT is determined by the period of the drive signal and N is a constant set manually as needed. N is the same for all sub-stages. In the embodiment of the present application, N for each stage in which each voltage is driven can be set to 5. The duration of the sub-phase at positive voltage is therefore 5*0.02 s, ie 0.1 s.

[0095] Meanwhile, the fourth homogenization stage S5 in the embodiment of the present disclosure is similar to the first homogenization stage S1, the second homogenization stage S2, and the third homogenization stage S3 described above. After completing one fourth homogenization stage S5, the fourth homogenization stage S5 can be repeated. The total number of executions of the fourth homogenization stage S5 can be set to M, where M is a natural number. For example, in the embodiment of the present application, M can be set to 3. In this manner, multiple executions of the fourth homogenization stage S5 can achieve a better homogenization effect after the oscillating motion of the particles in the microstructure 1, making it less likely that afterimages will occur when imaging the microstructure 1.

[0096] In some embodiments, as Figure 13 and Figure 14 As shown, the display stage includes a first sub-display stage S61, a second sub-display stage S62, and a third sub-display stage S63. The first drive signal O1 also includes a sixteenth sub-drive signal O16 in the first sub-display stage S61, the second drive signal O2 also includes a seventeenth sub-drive signal O26 in the first sub-display stage S61, and the third drive signal O3 also includes an eighteenth sub-drive signal O36 in the second sub-display stage S62 and the third sub-display stage S63. The sixteenth sub-drive signal includes the first voltage and zero voltage alternately arranged, the seventeenth sub-drive signal includes zero voltage and the second voltage alternately arranged, and the eighteenth sub-drive signal includes the second voltage, zero voltage, and the third voltage. The effective duration of the third voltage is greater than the duration of the second voltage.

[0097] In the embodiment of the present disclosure, the common electrodes 27 corresponding to the various microstructures 1 are electrically connected together. In this case, the Vcom voltage applied to each common electrode 27 is the same. In the display stage, the voltage of the Vcom electrode is 0V. Therefore, the electric field strength in each microstructure 1 is the driving signal on the pixel electrode 11. Since the sixteenth sub-driving signal 016 in the first driving signal 01 is input to the pixel electrode 11 of the microstructure 1 displaying black, the electric field in the microstructure 1 displaying black is the sixteenth sub-driving signal 016. Figure 13 As shown, the sixteenth sub-drive signal 016 is a sequence of the Vcom signal, the first voltage, the Vcom signal, and the first voltage. Because the black particles 4 are positively charged, the black particles 4 in the black microstructure 1 are closer to the display side than the white particles 5 and the colored particles. The sixteenth sub-drive signal 016 can cause the microstructure 1 electrically connected thereto to display black, completing the black display.

[0098] Similarly, since the seventeenth sub-driving signal 026 in the second driving signal 02 is input to the pixel electrode 11 of the microstructure 1 displaying white, the electric field in the microstructure 1 displaying white is the seventeenth sub-driving signal 026. Figure 13As shown, the seventeenth sub-drive signal 026 is the second voltage, the Vcom signal, the second voltage, and Vcom, arranged in sequence. Because the white particles 5 are negatively charged, the white particles 5 in the white microstructure 1 are closer to the display side than the black particles 4 and the colored particles. The seventeenth sub-drive signal 026 can cause the microstructure 1 electrically connected thereto to display white, completing the white display.

[0099] Similarly, since the eighteenth sub-driving signal 036 in the third driving signal 03 is input to the pixel electrode 11 of the microstructure 1 displaying red, the electric field in the microstructure 1 displaying red is the eighteenth sub-driving signal 036. Figure 14 As shown, the eighteenth sub-drive signal 036 is the second voltage, the Vcom signal, the third voltage, the Vcom signal, the second voltage, the Vcom signal, the third voltage, and the third voltage, arranged in sequence. Because the red particles 6 are positively charged and have a different charge-to-mass ratio than the black particles 4, the red particles 6 in the red-displaying microstructure 1 are closer to the display side than the black particles 4 and the white particles 5. The eighteenth sub-drive signal 036 can cause the microstructure 1 electrically connected thereto to display red, completing the red display.

[0100] It should be noted that the first sub-display stage S61 can be divided into four consecutive display sub-stages with different start and end times, similar to the first uniformization stage S1, the second uniformization stage S2, the third uniformization stage S3, and the fourth uniformization stage S5 described above. The sixteenth sub-drive signal O16 can be sequentially placed in consecutive sub-display stages. For example, the Vcom signal is in the first sub-display stage, the first voltage is in the second sub-display stage, the Vcom signal is in the third display stage, and the first voltage is in the fourth sub-display stage. Since the seventeenth sub-drive signal O26 and the sixteenth sub-drive signal O16 are both in the first display stage, the seventeenth sub-drive signal O26 can be sequentially placed in consecutive sub-display stages. For example, the second voltage is in the first sub-display stage, the Vcom signal is in the second sub-display stage, the second voltage is in the third sub-display stage, and Vcom is in the fourth sub-display stage.

[0101] Similar to the first, second, third, and fourth uniformization stages S1, S2, S3, and S5 described above, the durations of the drive signals within the same sub-stages of the fourth uniformization stage S5 are identical. Therefore, the durations of the sub-display stages in the sixteenth sub-drive signal O16 are t161, t162, t163, and t164, respectively; and the durations of the sub-display stages in the seventeenth sub-drive signal O26 are t261, t262, t263, and t264, respectively. Similar to the above embodiment, the duration of each sub-stage is set by ΔT*N, where ΔT is determined by the period of the drive signal and N is a constant set manually as needed. N is the same for each sub-stage. In an embodiment of the present application, N of the first and third sub-display stages S63 can be set to 16, and N of the second and fourth sub-display stages can be set to 12, so the duration of the former is 16*0.02s, i.e. 0.32s, and the duration of the latter is 12*0.02s, i.e. 0.24s.

[0102] Meanwhile, the first display stage in the embodiment of the present disclosure is the same as the first uniformization stage S1, the second uniformization stage S2, the third uniformization stage S3, and the fourth uniformization stage S5 described above. After completing one first display stage, the first display stage can be repeated. The total number of executions of the first display stage can be set to M, where M is a natural number. For example, in the embodiment of the present application, M can be set to 3. In this way, by executing the first display stage multiple times, the imaging effect of the microstructure 1 is improved.

[0103] It should also be noted that, similar to the sub-display stages in the first display stage described above, the durations of the drive signals in the same sub-display stages in the second and third display stages are identical. Therefore, the durations of the sub-display stages in the second sub-display stage S62 in the eighteenth sub-drive signal 036 are, respectively, t371, t372, t373, and t374; and the durations of the sub-display stages in the third sub-display stage S63 in the eighteenth sub-drive signal 036 are, respectively, t381, t382, t383, and t384. As in the above embodiment, the duration of each sub-stage is set by ΔT*N, where ΔT is determined by the period of the drive signal and N is a constant set manually as needed. N is the same for each sub-stage. In the embodiment of the present application, N in each display stage of the second display stage is 9, 4, 53, and 10, and their durations are 9*0.02s, 4*0.02s, 53*0.02s, and 10*0.02s, respectively. N in each display stage of the third display stage is 4, 3, 37, and 3, and their durations are 4*0.02s, 3*0.02s, 37*0.02s, and 3*0.02s, respectively. In this way, the microstructure 1 driven by the third drive signal 03 displays red.

[0104] At the same time, the second display stage in the embodiment of the present disclosure is the same as the third display stage described above. After completing one second display stage or third display stage, the second display stage or third display stage can be repeated. The total number of executions of the second display stage and the third display stage can be set to M1 and M2 respectively, where M1 and M2 are natural numbers. For example, in the embodiment of the present application, M1 can be set to 3 and M2 can be set to 2. In this way, the second display stage and the third display stage are executed multiple times, and the imaging effect of the microstructure 1 is better.

[0105] In some embodiments, the second sub-display stage S62 and the third sub-display stage S63 are sequentially placed after the first sub-display stage S61. That is, the microstructures 1 displaying white and black are imaged first, and then the microstructures 1 displaying red are imaged. In this way, on the one hand, the influence of the electrical properties of the red particles 6 on the black particles 4 is avoided, so that the microstructures 1 displaying black are as unaffected as possible by the red particles 6; on the other hand, because the driving voltage of the red particles 6, that is, the third voltage, is lower than the first voltage, the imaging effect of the microstructure 1 displaying red particles is worse than the imaging effect of the microstructure 1 displaying black and white particles in the same driving stage. Therefore, the driving of the microstructure 1 displaying red in the final stage can be divided into two consecutive stages.

[0106] In some embodiments, as Figure 2As shown, the color electronic paper also includes a controller 3 and multiple pixel drive circuits 2. The controller 3 generates control signals and drive signals based on the image displayed by the color electronic paper during the display phase. The drive signals include a first drive signal 01, a second drive signal 02, and a third drive signal 03. The pixel drive circuits 2 write the drive signals to the corresponding pixel electrodes 11 based on the control signals.

[0107] In the embodiment of the present disclosure, the controller determines the microstructure 1 to display black, white, and red based on the image to be displayed. The controller then outputs a control signal and a drive signal to the pixel drive circuit 2 corresponding to the microstructure 1. The control signal controls the corresponding pixel drive circuit to turn on, and inputs the corresponding drive signal into the corresponding pixel electrode 11. The drive signal includes a first drive signal 01, a second drive signal 02, and a third drive signal 03, which are used to control the microstructure 1 to display the corresponding color. In this way, the algorithm for generating the control signal in the controller is mature, and the frequency of the drive signal and the control signal generation and their signal waveform can be controlled, so that the color electronic paper can switch the displayed image.

[0108] In a second aspect, the present disclosure provides a color electronic paper, comprising: a plurality of microstructures 1, and a pixel driving circuit comprising pixel electrodes 11 and a common electrode 27. Each of the plurality of microstructures 1 comprises: black particles 4, white particles 5, and colored particles. The charges carried by the black particles 4 and the white particles 5 have opposite electrical properties, the charges carried by the black particles 4 and the colored particles have the same electrical properties, and the charge-to-mass ratio of the black particles 4 is greater than the charge-to-mass ratio of the colored particles. The color electronic paper further comprises: a controller and a plurality of pixel driving circuits; the controller is configured to generate a control signal and a driving signal according to the image displayed by the color electronic paper in the display stage; the control signal is configured to control the conduction of the pixel driving circuit, and the driving signal is configured to drive the black particles 4, white particles 5, and colored particles in the microstructure 1; the pixel driving circuit 2 is configured to write the driving signal into the corresponding pixel electrode 11 under the control of the control signal.

[0109] In the disclosed embodiment, the colored particles include, but are not limited to, red particles. The disclosed embodiment is described using red particles 6 as an example. The charge carried by the black particles 4 is of opposite electrical nature to that of the white particles 5 and of the same electrical nature as that of the red particles 6. Furthermore, the charge-to-mass ratio of the black particles 4 is greater than that of the red particles 6. The controller 2 generates a control signal and a drive signal based on the image to be displayed on the color electronic paper. The control signal is used to control the activation of the pixel drive circuit 2 electrically connected to the microstructure 1 to be displayed, and the drive signal is used to display the image. During the display phase, the controller controls the activation of the pixel drive circuit 2, which writes the corresponding drive signal to the pixel electrode 11 of the microstructure 1. The common electrode 27 of each microstructure 1 is connected and is generally grounded (0V) or set to a constant voltage. Therefore, the drive signal on the pixel electrode 11 and the common electrode 27 form an electric field, causing the charged particles therein to move. By using the pre-set waveform of the drive signal, the charged particles in the microstructure 1 can be controlled to move to a specific position to display an image.

[0110] In some embodiments, the pixel driving circuit includes a first transistor 9 and a second transistor 10. The first electrode of the first transistor 9 is connected to the data line, the second electrode of the first transistor 9 is connected to the first electrode of the second transistor 10, the second electrode of the second transistor 10 is connected to the pixel electrode 11, and the control electrodes of the first transistor 9 and the second transistor 10 are connected to the gate line.

[0111] In the embodiments of the present disclosure, Figure 15 and Figure 16 As shown, since the first electrode of the first transistor 9 is connected to the data line, the second electrode of the first transistor 9 is connected to the first electrode of the second transistor 10, the second electrode of the second transistor 10 is connected to the pixel electrode 11, and the control electrodes of the first transistor 9 and the second transistor 10 are connected to the gate line, when the control signal on the gate line controls the first transistor 9 and the second transistor 10 to turn on, the first transistor 9 and the second transistor 10 are a conductive series structure. In this way, the driving signal written by the data line to the first electrode of the first transistor 9 is transmitted to the second electrode of the second transistor 10.

[0112] In this way, on the one hand, the process of the pixel driving circuit is mature and the manufacturing yield is high; on the other hand, the use of two transistors connected in series when turned on reduces the leakage current of the pixel driving circuit, which is conducive to improving the quality of the driving signal passing through the pixel driving circuit, and thus improving the quality of the display effect.

[0113] In some embodiments, the orthographic projection of the pixel electrode 11 on the substrate completely covers the orthographic projections of the first transistor 9 and the second transistor 10 on the substrate. Figure 15As shown, the pixel electrode 11 completely covers the first transistor 9 and the second transistor 10. Specifically, Figure 17 This is a cross-sectional view of the pixel driving circuit 2 of the present disclosure. The pixel driving circuit 2 includes: a base substrate, a first metal layer 12, an active layer 13, a second metal layer 14, a first insulating layer 15, a second insulating layer 17, a first planarization layer 16, and a first transparent conductive layer sequentially disposed on the base substrate. Among them, the first metal layer 12 includes the gate of the first transistor 9 and the second transistor 10; the active layer 13 includes the active layer 13 of the first transistor 9 and the active layer 13 of the second transistor 10. In this application, the active layer 13 of the first transistor 9 and the active layer 13 of the second transistor 10 are an integrated structure; the second metal layer 14 includes the source and drain of the first transistor 9 and the source and drain of the second transistor 10; the first insulating layer 15 and the first planarization layer 16 are sequentially provided on the first metal layer 12, and a first through hole is provided that penetrates the first insulating layer 15 and the first planarization layer 16. The first transparent conductive layer serves as the pixel electrode 11, which is electrically connected to the drain of the first transistor 9 or the second transistor 10 through the first through hole, and the pixel electrode 11 completely covers the first transistor 9 and the second transistor 10. In this way, the pixel circuit with this structure has a mature process and a high yield rate. At the same time, this type of pixel electrode 11 completely covers the pixel circuit of the transistor, which can be conducive to adapting to a display substrate with a microstructure 1 with a larger operating temperature range, for example, it can be adapted to a display substrate with an operating temperature range of (0-40°C).

[0114] Also, in some embodiments, Figure 16 As shown, the orthographic projection of the pixel electrode 11 on the substrate does not overlap at least partially with the orthographic projections of the first transistor 9 and the second transistor 10 on the substrate. Figure 18 As shown, the structure of this pixel driving circuit is similar to the pixel driving structure in the above embodiment, so it will not be described in detail here. Figure 18 As shown, the pixel electrode 11 of the present disclosure does not completely cover the first transistor 9 and the second transistor 10. In this way, a pixel circuit having this structure can be realized through only four masking and photolithography processes, greatly reducing manufacturing and design costs. At the same time, the influence between the individual microstructures 1 in the display panel having microstructures 1 adapted to this pixel circuit is minimal, thereby improving the imaging effect of the electronic paper.

[0115] In a third aspect, an embodiment of the present disclosure provides a non-transitory computer-readable medium having a computer program stored thereon, which implements any of the above-mentioned color electronic paper driving methods when the program is executed by a processor.

[0116] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As is well known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable, and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those skilled in the art that communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0117] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A method for driving an electronic paper display device, comprising: a controller, a substrate, a plurality of pixel driving circuits disposed on the substrate, and an electronic paper film, wherein the electronic paper film comprises a plurality of microstructures; the plurality of pixel driving circuits comprises a common electrode and a plurality of pixel electrodes between the plurality of microstructures; Each of the plurality of microstructures comprises: Black particles, white particles, and colored particles; wherein the black particles and the white particles have charges of opposite electrical properties; the black particles and the colored particles have charges of the same electrical properties, and the charge-to-mass ratio of the black particles is greater than the charge-to-mass ratio of the colored particles; the driving method comprises: The controller inputs a first driving signal to the pixel electrode of the pixel driving circuit corresponding to the pixel that needs to display black according to the image to be displayed; inputs a second driving signal to the pixel electrode of the pixel driving circuit corresponding to the pixel that needs to display white; and inputs a third driving signal to the pixel electrode of the pixel driving circuit corresponding to the pixel that needs to display color; wherein, The driving phase of the electronic paper display device includes a first uniformization phase, which includes a plurality of sub-uniformization phases. In the last sub-uniformization phase, the first driving signal includes a first sub-driving signal, the second driving signal includes a second sub-driving signal, and the third driving signal includes a third sub-driving signal. The voltage of the first sub-driving signal is opposite to the electrical property of the black particles. The voltage of the second sub-driving signal is opposite to the electrical property of the white particles. The voltage of the third sub-driving signal is opposite to the electrical property of the colored particles. The driving phase of the electronic paper display device further includes a second uniformization phase, which is prior to the first uniformization phase; the first driving signal further includes a fourth sub-driving signal in the second uniformization phase, the second driving signal further includes a fifth sub-driving signal in the second uniformization phase, and the third driving signal further includes a sixth sub-driving signal in the second uniformization phase; the fourth sub-driving signal, the fifth sub-driving signal, and the sixth sub-driving signal include a first voltage and a second voltage, the first voltage being a positive voltage and the second voltage being a negative voltage; wherein the effective duration of the second voltage is greater than the effective duration of the first voltage.

2. The driving method according to claim 1, wherein: The driving stage of the electronic paper display device also includes a third uniformization stage, which is between the second uniformization stage and the first uniformization stage; the first driving signal also includes a seventh sub-driving signal in the third uniformization stage, the second driving signal also includes an eighth sub-driving signal in the third uniformization stage, and the third driving signal also includes a ninth sub-driving signal in the third uniformization stage; the seventh sub-driving signal, the eighth sub-driving signal, and the ninth sub-driving signal all include pulse signals with alternating positive and negative voltages.

3. The driving method according to claim 2, wherein: An effective duration of a negative voltage in the pulse signals in the seventh sub-driving signal, the eighth sub-driving signal, and the ninth sub-driving signal is greater than an effective duration of a positive voltage.

4. The driving method according to claim 1, wherein: The driving phase of the electronic paper display device further includes a fourth uniformization phase, which is prior to the display phase of the electronic paper display device; the first driving signal further includes a tenth sub-driving signal in the fourth uniformization phase, the second driving signal further includes an eleventh sub-driving signal in the fourth uniformization phase, and the third driving signal further includes a twelfth sub-driving signal in the fourth uniformization phase; The tenth sub-driving signal and the eleventh sub-driving signal include pulse signals with alternating negative and positive voltages; the pulse signals of the tenth sub-driving signal and the eleventh sub-driving signal are the same, and the pulse signals of the twelfth sub-driving signal and the tenth sub-driving signal are opposite; The voltage of the common electrode of the pixel driving circuit includes a pulse signal in which negative and positive voltages alternate in sequence, and has the same waveform as the pulse signal of the pixel electrode in the same pixel driving circuit.

5. The driving method according to claim 4, wherein: The driving phase of the electronic paper display device further includes a balancing phase, the balancing phase being before the fourth uniformization phase; the first driving signal further includes a thirteenth sub-driving signal in the balancing phase, the second driving signal further includes a fourteenth sub-driving signal in the balancing phase, and the third driving signal further includes a fifteenth sub-driving signal in the balancing phase; The thirteenth sub-driving signal and the fourteenth sub-driving signal can drive the white particles in the microstructure to return to their initial positions; the fifteenth sub-driving signal can drive the white particles and colored particles in the microstructure to return to their initial positions.

6. The driving method according to claim 4, wherein: The display stage includes a first sub-display stage, a second sub-display stage, and a third sub-display stage; the first driving signal also includes a sixteenth sub-driving signal in the first sub-display stage, the second driving signal also includes a seventeenth sub-driving signal in the first sub-display stage, and the third driving signal also includes an eighteenth sub-driving signal in the second sub-display stage and the third sub-display stage; The sixteenth sub-driving signal includes the first voltage and zero voltage alternately arranged; The seventeenth sub-driving signal includes the zero voltage and the second voltage alternately arranged; The eighteenth sub-driving signal includes the second voltage, the zero voltage, and a third voltage; wherein an effective duration of the third voltage is greater than the duration of the second voltage.

7. The driving method according to claim 6, wherein: The second sub-display stage and the third sub-display stage are sequentially located after the first sub-display stage.

8. The driving method according to claim 1, wherein: The sub-uniformization stages in which the starting driving moments of the first uniformization stage increase in sequence are the first sub-uniformization stage, the second sub-uniformization stage, the third sub-uniformization stage, and the fourth sub-uniformization stage respectively; the first driving signal further includes a nineteenth sub-driving signal in the first sub-uniformization stage and the second sub-uniformization stage; the second driving signal further includes a twenty-first sub-driving signal in the first sub-uniformization stage and the second sub-uniformization stage; and the third driving signal further includes a twenty-third sub-driving signal in the first sub-uniformization stage and the second sub-uniformization stage; The nineteenth sub-driving signal, the twenty-first sub-driving signal, and the twenty-third sub-driving signal all include pulse signals in which positive and negative voltages alternate in sequence.

9. The driving method according to claim 8, wherein: A positive voltage duration of the pulse signal in the nineteenth sub-driving signal, the twenty-first sub-driving signal, and the twenty-third sub-driving signal is shorter than a negative voltage duration.

10. The driving method according to claim 9, wherein: The first driving signal further includes a 20th sub-driving signal in the third sub-uniformization stage; the second driving signal further includes a 22nd sub-driving signal in the third sub-uniformization stage; and the third driving signal further includes a 24th sub-driving signal in the third sub-uniformization stage. The 20th sub-driving signal, the 22nd sub-driving signal, and the 24th sub-driving signal include a second voltage.

11. The driving method according to any one of claims 1 to 10, wherein: The microstructure includes a microcup structure and a microcapsule structure.

12. An electronic paper display device, comprising: A controller, a substrate, a plurality of pixel driving circuits and an electronic paper film arranged on the substrate; The electronic paper film includes a plurality of microstructures; Each of the plurality of microstructures includes: black particles, white particles, and colored particles; wherein the black particles and the white particles have charges of opposite electrical properties; the black particles and the colored particles have charges of the same electrical properties, and the charge-to-mass ratio of the black particles is greater than the charge-to-mass ratio of the colored particles; The controller is configured to adopt the driving method according to any one of claims 1 to 11 to generate a control signal and a driving signal according to the image displayed by the electronic paper display device in a display phase; the control signal is configured to control the conduction of the pixel driving circuit, and the driving signal is configured to drive the black particles, the white particles, and the colored particles in the microstructure; The pixel driving circuit includes a common electrode and a pixel electrode between the plurality of microstructures, and is configured to write the driving signal into the corresponding pixel electrode under the control of the control signal; the driving signal includes at least a first driving signal, a second driving signal and a third driving signal.

13. The electronic paper display device according to claim 12, wherein: The pixel driving circuit also includes a first transistor and a second transistor; wherein the first electrode of the first transistor is connected to the data line, the second electrode of the first transistor is connected to the first electrode of the second transistor, the second electrode of the second transistor is connected to the pixel electrode, and the control electrodes of the first transistor and the second transistor are connected to the gate line.

14. The electronic paper display device according to claim 13, wherein: The orthographic projection of the pixel electrode on the substrate completely covers the orthographic projections of the first transistor and the second transistor on the substrate.

15. The electronic paper display device according to claim 14, wherein: The orthographic projection of the pixel electrode on the substrate does not at least partially overlap with the orthographic projections of the first transistor and the second transistor on the substrate.

16. A non-transitory computer-readable medium having a computer program stored thereon, wherein when the program is executed by a processor, the method according to any one of claims 1 to 11 is implemented.

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