Electrophoretic display, driving method and preparation method thereof and display device

Abstract

The invention discloses an electrophoretic display, a driving method and a preparation method thereof and a display device, and belongs to the technical field of display. The electrophoretic display comprises a display unit (01), a display driving unit (02) and a sound wave emission unit (03). The display driving unit (02) can provide a display driving signal for the display unit (01) so as to control the distribution pattern of a plurality of electrophoretic particles included in the electrophoretic display layer (012) in the display unit (01). The sound wave emission unit (03) can emit a sound wave signal to the display unit (01) so as to control the distribution pattern of the plurality of electrophoretic particles. Therefore, sound wave signals can be transmitted through the sound wave transmitting unit (03) between different picture frames to quickly excite the plurality of electrophoretic particles to shake and be in a balanced distribution form, so that the problem of abnormal display similar to residual images of the electrophoretic display is avoided, and the display picture quality of the electrophoretic display is ensured to be better.

Description

Electrophoretic display, driving method thereof, manufacturing method, and display device Technical Field

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

[0002] Electrophoretic display (e.g., electronic paper) is an emerging display product that provides a display effect close to that of natural paper and can reduce visual fatigue during reading. It is mainly used in devices such as billboards and e-readers.

[0003] In related art, an electrophoretic display generally includes a display driver unit and a display unit. The display unit includes multiple electrophoretic particles with variable distribution patterns. The display driver unit can provide a display drive signal to the display unit to control the distribution pattern of the multiple electrophoretic particles and drive the electrophoretic display to display an image.

[0004] However, since multiple electrophoretic particles are prone to losing balance or agglomerating, the electrophoretic display may have display anomalies such as afterimages after displaying images multiple times, resulting in poor display quality.

[0005] Summary of the Invention

[0006] The present disclosure provides an electrophoretic display and its driving method, manufacturing method, and display device. The technical solution is as follows:

[0007] An electrophoretic display is provided, comprising:

[0008] The display unit includes a first electrode, an electrophoretic display layer, and a second electrode stacked in sequence;

[0009] a display driving unit, located at one side of the display unit, for providing a display driving signal to the first electrode in the display unit;

[0010] an acoustic wave transmitting unit, located on one side of the display unit, for transmitting an acoustic wave signal to the electrophoretic display layer in the display unit;

[0011] The electrophoretic display layer includes a plurality of electrophoretic particles, and the distribution forms of the plurality of electrophoretic particles are configured to change under the control of the display driving signal and the electrical signal received by the second electrode, and are configured to change under the control of the acoustic wave signal.

[0012] Optionally, the acoustic wave emitting unit is configured to emit an acoustic wave signal to the electrophoretic display layer during a blanking phase between two adjacent frame display phases, so as to control the plurality of electrophoretic particles to be in a balanced distribution form.

[0013] The sound wave emitting unit includes an ultrasonic wave emitting unit; the sound wave signal emitted by the sound wave emitting unit includes an ultrasonic wave signal.

[0014] Optionally, the display unit further includes: a dielectric layer located between the first electrode and the electrophoretic display layer;

[0015] The acoustic wave emitting unit includes: a third electrode and a fourth electrode arranged opposite to each other, and a piezoelectric material layer located between the third electrode and the fourth electrode; the piezoelectric material layer is used to emit an acoustic wave signal under the control of a piezoelectric excitation signal received by the third electrode and an electrical signal received by the fourth electrode.

[0016] Optionally, the sound wave emitting unit and the display driving unit are independent of each other and attached to each other;

[0017] Furthermore, the acoustic wave emitting unit and the display driving unit are stacked in sequence in a direction close to the display unit, and the third electrode, the piezoelectric material layer and the fourth electrode in the acoustic wave emitting unit are stacked in sequence in a direction close to the display driving unit.

[0018] Optionally, the display driving unit includes: a bottom conductive layer, an intermediate layer, and a source-drain conductive layer stacked in sequence in a direction close to the display unit, and the source-drain conductive layer and the first electrode in the display unit are located in the same layer and spaced apart from each other;

[0019] Wherein, at least one of the third electrode and the fourth electrode included in the acoustic wave emitting unit is shared with the conductive structure in the display driving unit or the conductive structure in the display unit.

[0020] Optionally, the bottom conductive layer includes: a gate conductive layer, and the fourth electrode is shared by the gate conductive layer; or the bottom conductive layer includes: a light-shielding conductive layer and a gate conductive layer stacked in sequence in a direction close to the middle layer, and the fourth electrode is shared by the light-shielding conductive layer;

[0021] Furthermore, the third electrode, the piezoelectric material layer, and the fourth electrode are sequentially stacked in a direction approaching the display unit.

[0022] Optionally, the fourth electrode is shared with the first electrode; and the third electrode satisfies any of the following conditions:

[0023] The third electrode and the source-drain conductive layer are located in different layers;

[0024] The third electrode is shared by the source-drain conductive layer;

[0025] The third electrode is located in the same layer as the source-drain conductive layer, and is spaced apart from the source-drain conductive layer and the first electrode.

[0026] Optionally, the third electrode and the source-drain conductive layer are located in different layers;

[0027] Furthermore, the third electrode and the piezoelectric material layer are located on a side of the intermediate layer away from the underlying conductive layer, and the third electrode, the piezoelectric material layer and the fourth electrode are stacked in sequence in a direction away from the intermediate layer, and the piezoelectric material layer and the third electrode have vias exposing the intermediate layer, and the source-drain conductive layer and the first electrode are overlapped with the intermediate layer through the vias.

[0028] Optionally, the third electrode is shared with the source-drain conductive layer;

[0029] Furthermore, the piezoelectric material layer is located between the source-drain conductive layer and the first electrode.

[0030] Optionally, the third electrode and the source-drain conductive layer are located in the same layer;

[0031] Furthermore, the third electrode is located on a side of the first electrode away from the source-drain conductive layer, and the piezoelectric material layer is located between the first electrode and the third electrode.

[0032] Optionally, the piezoelectric material layer is further located between the first electrode and the dielectric layer;

[0033] Furthermore, the orthographic projection of the piezoelectric material layer on the intermediate layer covers the orthographic projections of the layers located on the same layer between the piezoelectric material layer and the intermediate layer on the intermediate layer.

[0034] Optionally, the dielectric layer is shared with the piezoelectric material layer.

[0035] Optionally, the third electrode is located in the same layer as the source-drain conductive layer, and is spaced apart from the source-drain conductive layer and the first electrode, and is located on a side of the first electrode away from the source-drain conductive layer;

[0036] The display unit further includes: an electrode protection layer located between the first electrode and the dielectric layer, and the electrode protection layer covers the top surface of the first electrode close to the dielectric layer and the side surface of the first electrode close to the third electrode; the fourth electrode is shared with the electrode protection layer.

[0037] In another aspect, a driving method for an electrophoretic display is provided, which is applied to the electrophoretic display as described in the above aspect; the method comprises:

[0038] In a multi-frame display stage, in each frame display stage, a display driving unit provides a display driving signal to a first electrode in the display unit, controls a plurality of electrophoretic particles included in the electrophoretic display layer in the display unit to be in a display distribution form based on the display driving signal and an electrical signal received by a second electrode in the display unit, and drives the display unit to refresh to display an image;

[0039] In the blanking phase between each two adjacent display phases, the acoustic wave emission unit emits an acoustic wave signal to the electrophoretic display layer to control the distribution form of the multiple electrophoretic particles to switch from the display distribution form to a balanced distribution form.

[0040] In another aspect, a method for preparing an electrophoretic display is provided, which is used to prepare the electrophoretic display as described in the above aspect; the method comprises:

[0041] forming a display unit, wherein the display unit includes a first electrode, an electrophoretic display layer, and a second electrode stacked in sequence;

[0042] A display driving unit is formed on one side of the display unit, and the display driving unit is used to provide a display driving signal to the first electrode in the display unit;

[0043] An acoustic wave emitting unit is formed on one side of the display unit, and the acoustic wave emitting unit is used to emit an acoustic wave signal to the electrophoretic display layer in the display unit;

[0044] The formed electrophoretic display layer includes a plurality of electrophoretic particles, and the distribution forms of the plurality of electrophoretic particles are used to change under the control of the display driving signal and the electrical signal received by the second electrode, and are used to change under the control of the acoustic wave signal.

[0045] In another aspect, a display device is provided, comprising: a power supply component, and the electrophoretic display according to the above aspect;

[0046] The power supply component is coupled to the electrophoretic display and is used to supply power to the electrophoretic display. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0048] FIG1 is a schematic structural diagram of an electrophoretic display provided by an embodiment of the present disclosure;

[0049] FIG2 is a schematic structural diagram of another electrophoretic display provided by an embodiment of the present disclosure;

[0050] FIG3 is a schematic structural diagram of another electrophoretic display provided by an embodiment of the present disclosure;

[0051] FIG4 is a schematic structural diagram of another electrophoretic display provided by an embodiment of the present disclosure;

[0052] FIG5 is a structural diagram corresponding to the electrophoretic display shown in FIG4 ;

[0053] FIG6 is a flow chart of the preparation process of the electrophoretic display shown in FIG4;

[0054] FIG7 is a schematic structural diagram of another electrophoretic display provided by an embodiment of the present disclosure;

[0055] FIG8 is a structural layout diagram corresponding to the electrophoretic display shown in FIG7 ;

[0056] FIG9 is a flow chart of the preparation process of the electrophoretic display shown in FIG7;

[0057] FIG10 is a schematic structural diagram of another electrophoretic display provided by an embodiment of the present disclosure;

[0058] FIG11 is a structural layout diagram corresponding to the electrophoretic display shown in FIG10 ;

[0059] FIG12 is a flow chart of the preparation process of the electrophoretic display shown in FIG10;

[0060] FIG13 is a schematic structural diagram of another electrophoretic display provided by an embodiment of the present disclosure;

[0061] FIG14 is a structural layout diagram corresponding to the electrophoretic display shown in FIG13;

[0062] FIG15 is a flow chart of the preparation process of the electrophoretic display shown in FIG13;

[0063] FIG16 is a schematic structural diagram of another electrophoretic display provided by an embodiment of the present disclosure;

[0064] FIG17 is a structural layout diagram corresponding to the electrophoretic display shown in FIG16;

[0065] FIG18 is a flow chart of the preparation process of the electrophoretic display shown in FIG16;

[0066] FIG19 is a schematic structural diagram of another electrophoretic display provided by an embodiment of the present disclosure;

[0067] FIG20 is a flow chart of the preparation process of the electrophoretic display shown in FIG19;

[0068] FIG21 is a schematic structural diagram of another electrophoretic display provided by an embodiment of the present disclosure;

[0069] FIG22 is a structural layout diagram corresponding to the electrophoretic display shown in FIG21;

[0070] FIG23 is a flow chart of the preparation process of the electrophoretic display shown in FIG21;

[0071] FIG24 is a flow chart of a driving method of an electrophoretic display provided by an embodiment of the present disclosure;

[0072] FIG25 is a flow chart of a method for preparing an electrophoretic display according to an embodiment of the present disclosure;

[0073] FIG26 is a schematic structural diagram of a display device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0074] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0075] FIG1 is a schematic diagram of the structure of an electrophoretic display provided by an embodiment of the present disclosure. As shown in FIG1 , the electrophoretic display includes: a display unit 01 , a display driving unit 02 , and an acoustic wave emitting unit 03 .

[0076] 2 , which shows a schematic structural diagram of another electrophoretic display based on FIG1 , shows that the display unit 01 includes a first electrode 011, an electrophoretic display layer 012, and a second electrode 013, which are stacked in sequence. The electrophoretic display layer 012 includes a plurality of electrophoretic particles (EP), the distribution of which can be dynamically changed to reflect light, allowing the electrophoretic display to display images.

[0077] For example, the term "stacked sequentially" herein may refer to stacking the first electrode 011, the electrophoretic display layer 012, and the second electrode 013 sequentially in a direction away from the display driver unit 02. Accordingly, the side of the second electrode 013 away from the electrophoretic display layer 012 may be referred to as the display side. Light may enter the electrophoretic display layer 012 through the display side and be reflected toward the user's eyes, allowing the user to view images displayed by the electrophoretic display on the display side.

[0078] Optionally, the first electrode 011 may be a pixel electrode, and the material of the first electrode 011 may include a metal material. The second electrode 013 may be a common electrode (i.e., a Com electrode), and the material of the second electrode 013 may include a transparent conductive material, such as indium tin oxide (ITO). In this way, a good light transmission effect on the display side can be ensured. Of course, the materials here are only schematic illustrations.

[0079] Continuing to refer to FIG1 and FIG2 , it can be seen that the display driving unit 02 is located on one side of the display unit 01 and is used to provide a display driving signal to the first electrode 011 in the display unit 01. For example, referring to FIG2 , the display driving unit 02 can be located on a side of the first electrode 011 in the display unit 01 away from the electrophoretic display layer 012, in contact with the first electrode 011, so as to reliably provide the display driving signal to the first electrode 011.

[0080] Furthermore, the distribution of the plurality of electrophoretic particles EP included in the electrophoretic display layer 012 can change under the control of the display drive signal and the electrical signal received by the second electrode 013. For example, the distribution of the plurality of electrophoretic particles EP can change under the influence of the voltage difference between the display drive signal and the electrical signal received by the second electrode 013. Accordingly, it can be seen that the second electrode 013 requires an external power supply to receive the electrical signal.

[0081] Optionally, the display driver unit 02 may include multiple transistors, such as thin film transistors (TFTs), which may also be referred to as a TFT backplane (BP), i.e., a TFT BP. TFT materials may include low-temperature polysilicon (LTPS), oxide, and / or single-crystal silicon (A-Si). This refers to the material of the active layer in the TFT.

[0082] Continuing with reference to Figures 1 and 2 , it can be seen that the acoustic wave emitting unit 03 is located on one side of the display unit 01 and is used to transmit acoustic wave signals to the electrophoretic display layer 012 in the display unit 01. For example, referring to Figure 2 , in some embodiments, the acoustic wave emitting unit 03 can be located on the side of the first electrode 011 in the display unit 01 away from the electrophoretic display layer 012, and on the side of the display driver unit 02 away from the display unit 01. That is, based on this embodiment, the acoustic wave emitting unit 03, the display driver unit 02, and the display unit 01 can be stacked in sequence.

[0083] Furthermore, the distribution of the plurality of electrophoretic particles EP included in the electrophoretic display layer 012 can also be changed under the control of the acoustic wave signal. Because the acoustic wave signal generally has high-frequency characteristics, the acoustic wave emission unit 03 can be controlled to emit an acoustic wave signal to the electrophoretic display layer 012 during the blanking phase between two adjacent frame display phases, that is, between different picture frames, so as to stimulate and shake the plurality of electrophoretic particles EP without affecting the display image, so that the plurality of electrophoretic particles EP are reliably in a balanced distribution form, thereby preventing the plurality of electrophoretic particles EP from losing balance or agglomerating, thereby preventing the electrophoretic display from having display anomalies such as residual images after multiple display images, and ensuring better display quality. During each frame display phase, the acoustic wave emission unit 03 can be controlled to stop emitting the acoustic wave signal, and the display drive unit 02 transmits a display drive signal to the first electrode 011, so that the distribution of the plurality of electrophoretic particles EP changes under the control of the voltage difference between the display drive signal and the electrical signal received by the second electrode 013, such as controlling the plurality of electrophoretic particles EP to be in a display distribution form, thereby driving the electrophoretic display to refresh and display the image.

[0084] It should be noted that the display distribution pattern may refer to the pattern in which the multiple electrophoretic particles EP move toward the side closer to the second electrode 013 to reach the display side. Correspondingly, the balanced distribution pattern may refer to the pattern in which the multiple electrophoretic particles EP are evenly distributed in the middle of the electrophoretic display layer 012 before moving to the display side.

[0085] In the related art, it is also proposed to improve the afterimage problem by adjusting the distribution form of multiple electrophoretic particles EP by controlling the potential of the pixel electrode (i.e., the potential of the display drive signal provided by the display drive unit 01 to the first electrode 011). For example, in some embodiments, between two adjacent frame display stages, a balanced potential and a mixed potential are sequentially provided to the pixel electrode. The balanced potential is used to balance the residual charge in the multiple electrophoretic particles EP, and the mixed potential is used to evenly disperse the multiple electrophoretic particles EP so that they are in a balanced distribution form. That is, the related art requires providing two potentials in sequence and performing two actions to achieve a balanced distribution form by controlling the potential of the pixel electrode, which takes a long time. However, the embodiment of the present disclosure, by providing an acoustic wave emission unit 03 to emit a high-frequency acoustic wave signal, can directly control the multiple electrophoretic particles EP to be in a balanced distribution form, without the need to sequentially perform the equilibrium stage and the activation stage, and the time required is shorter. In this way, not only can the afterimage problem be solved, but the response time of the multiple electrophoretic particles EP from the balanced distribution form to the display distribution form can also be shortened, solving the problem of slow response time and ensuring a good refresh rate.

[0086] In summary, an embodiment of the present disclosure provides an electrophoretic display. The electrophoretic display includes a display unit, a display driving unit, and an acoustic wave emitting unit. The display driving unit is capable of providing a display driving signal to the display unit to control the distribution pattern of multiple electrophoretic particles included in the electrophoretic display layer in the display unit. The acoustic wave emitting unit is capable of emitting an acoustic wave signal to the display unit to control the distribution pattern of multiple electrophoretic particles. In this way, an acoustic wave signal can be emitted by the acoustic wave emitting unit between different picture frames to quickly stimulate the jitter of multiple electrophoretic particles to be in a balanced distribution pattern, thereby avoiding display abnormalities such as afterimages in the electrophoretic display and ensuring that the display quality of the electrophoretic display is good.

[0087] As described in the above embodiments, the acoustic wave emission unit 03 provided by the present disclosure can be used to emit acoustic wave signals to the electrophoretic display layer 012 during the blanking phase between two adjacent frame display phases, controlling the multiple electrophoretic particles EP to be in a balanced distribution form, thereby solving the afterimage problem and ensuring better display quality.

[0088] Optionally, in some embodiments, the acoustic wave emitting unit 03 may include an ultrasonic wave emitting unit. Accordingly, the acoustic wave signal emitted by the acoustic wave emitting unit 03 includes an ultrasonic wave signal. Alternatively, in some other embodiments, the acoustic wave signal emitted by the acoustic wave emitting unit 03 may also include an infrasonic wave signal or other types of acoustic wave signals. This disclosure is not limited to this, as long as it can stimulate the multiple electrophoretic particles EP in the electrophoretic display layer 012 to vibrate and quickly restore them to a balanced distribution.

[0089] Optionally, as can be seen from FIG. 2 , the display unit 01 described in the embodiment of the present disclosure may further include a dielectric layer 014 located between the first electrode 011 and the electrophoretic display layer 012 . The dielectric layer 014 has an isolation function similar to that of an insulating layer, preventing electrical breakdown between the first electrode 011 and the electrophoretic display layer 012 . Of course, the division of the film layers of each unit in the embodiment of the present disclosure is merely schematic. For example, in some embodiments, the first electrode 011 , the second electrode 013 , and the dielectric layer 014 may also be divided into the display driver unit 02 .

[0090] Optionally, the material of the dielectric layer 014 may include inorganic dielectric materials such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon oxynitride (SiOxNy). Of course, this is only a schematic example.

[0091] Optionally, based on Figure 2, referring to the structural schematic diagram of another electrophoretic display shown in Figure 3, it can be seen that the sound wave emission unit 03 provided in the embodiment of the present disclosure may include: a third electrode 031 and a fourth electrode 032 arranged opposite to each other, and a piezoelectric material layer 033 located between the third electrode 031 and the fourth electrode 032.

[0092] The piezoelectric material layer 033 is used to emit acoustic signals under the control of the piezoelectric excitation signal (a high-frequency signal) received by the third electrode 031 and the electrical signal received by the fourth electrode 032. Accordingly, both the third electrode 031 and the fourth electrode 032 require an external power source to receive the required signals.

[0093] Optionally, the material of the third electrode 031 and the material of the fourth electrode 032 may both include a metallic conductive material or a transparent conductive material, such as ITO. The material of the piezoelectric material layer 033 may include a piezoelectric ceramic, such as a piezoelectric polymer such as polyvinylidene fluoride (PVDF), or a new electronic ceramic material such as aluminum nitride (ALN). Of course, the materials described here are merely illustrative.

[0094] Optionally, in a touch display product that uses ultrasonic signals to implement a touch function, the third electrode 031 here can be shared with the touch signal transmitting electrode TX, also referred to as a TX electrode.

[0095] Optionally, FIG4 is a schematic structural diagram of another electrophoretic display provided by an embodiment of the present disclosure. As shown in FIG4 , the display driving unit 02 may include: a bottom conductive layer 021, an intermediate layer 022 (e.g., an insulating layer), and a source-drain conductive layer 023 stacked in sequence in a direction close to the display unit 01. The source-drain conductive layer 023 and the first electrode 011 in the display unit 01 may be located in the same layer and spaced apart from each other. In the embodiment of the present disclosure, the portion including the bottom conductive layer 021 and the intermediate layer 022 may be referred to as a TFT substrate, and the entire portion including the bottom conductive layer 021, the intermediate layer 022, and the source-drain conductive layer 023 may be referred to as a TFT backplane.

[0096] For example, referring to Figure 4, the bottom conductive layer 021 may include: a gate conductive layer GATE. Alternatively, a light-shielding conductive layer LS and a gate conductive layer GATE are stacked in sequence in a direction close to the middle layer 022 (the stacking relationship is not shown in the figure). Among them, the light-shielding conductive layer LS can be used to block light to prevent external light from affecting the display effect. The gate conductive layer GATE can be used to form a gate line Gate1; the source and drain conductive layer 023 can be used to form a data line Data1. The materials of the conductive layers here can all include metal materials, such as metal aluminum Al. Of course, in some other embodiments, other materials may also be included, such as transparent conductive materials.

[0097] It should be noted that being located in the same layer may refer to a layer structure formed by using the same film-forming process to form a film layer for forming a specific pattern, and then using the same mask to pattern the film layer through a single patterning process. Depending on the specific pattern, a single patterning process may include multiple exposure, development, or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous. That is, multiple elements, components, structures, and / or parts located in the "same layer" are made of the same material and are formed through the same patterning process. In this way, the preparation process and preparation costs can be saved, and the preparation efficiency can be accelerated.

[0098] In the embodiment of the present disclosure, the acoustic wave emitting unit 03 and the display driving unit 02 / display unit 03 can be independently or integrated with each other. Compared with the integrated configuration, the independent configuration has fewer restrictions on the materials and process flow when preparing each layer of the acoustic wave emitting unit 03 because the acoustic wave emitting unit 03 can be manufactured separately. However, more masks are required, which increases the cost and thickness.

[0099] That is, as an optional implementation: with reference to FIG3 , the acoustic wave emitting unit 03 and the display driving unit 02 described in the embodiment of the present disclosure can be independent of each other and attached to each other, for example, by using binding glue.

[0100] Furthermore, in some embodiments, as shown in FIG3 , the acoustic wave emitting unit 03 and the display driving unit 02 may be stacked sequentially in a direction approaching the display unit 01, and the third electrode 031, the piezoelectric material layer 033, and the fourth electrode 032 in the acoustic wave emitting unit 03 may be stacked sequentially in a direction approaching the display driving unit 02. Based on this positional relationship, the third electrode 031 may also be generally referred to as a lower electrode, and the fourth electrode 032 may also be generally referred to as an upper electrode.

[0101] In this implementation, the acoustic wave emitting unit 03 can be fabricated in the following order: the third electrode 031, the piezoelectric material layer 033, and the fourth electrode 032 can be formed in sequence. Subsequently, the display driver unit 02 and the display unit 01 can be stacked and formed on the side of the fourth electrode 032 away from the piezoelectric material layer 033. Of course, the fabrication sequence shown here is merely illustrative.

[0102] As another optional implementation, at least one of the third electrode 031 and the fourth electrode 032 included in the acoustic wave emission unit 03 can be shared with the conductive structure in the display driver unit 02 or the conductive structure in the display unit 01. Of course, when both the third electrode 031 and the fourth electrode 032 share the conductive structure in the display driver unit 02 or the display unit 01, the shared conductive structures of the third electrode 031 and the fourth electrode 032 are different. These two shared structures can be fabricated simultaneously using the same mask process. This shared structure can reduce the overall thickness of the electrophoretic display, save costs, and improve manufacturing efficiency.

[0103] In this alternative implementation, the following embodiments provide various implementation methods:

[0104] Embodiment 1: Referring to FIG4 , in a structure where the bottom conductive layer 021 includes a gate conductive layer GATE, the fourth electrode 032 and the gate conductive layer GATE can be shared. Accordingly, the gate conductive layer GATE and the third electrode 031 can control the piezoelectric material layer 033 from transmitting an acoustic wave signal. Alternatively, in a structure where the bottom conductive layer 021 includes a light-shielding conductive layer LS and a gate conductive layer GATE, the fourth electrode 032 and the light-shielding conductive layer LS can be shared. Accordingly, the light-shielding conductive layer LS and the third electrode 031 can control the piezoelectric material layer 033 from transmitting an acoustic wave signal. FIG5 shows a layout of the structure shown in FIG4 .

[0105] That is, if there is a light-shielding conductive layer LS, the light-shielding conductive layer LS can be reused as the upper electrode; if there is no light-shielding conductive layer LS, the gate conductive layer GATE can be reused as the upper electrode. In addition, the third electrode 031, the piezoelectric material layer 033, and the fourth electrode 032 sharing the gate conductive layer GATE / light-shielding conductive layer LS can be stacked in sequence in a direction close to the display unit 01. That is, the third electrode 031 and the piezoelectric material layer 033 can be prepared below the display driving unit 02. Accordingly, the piezoelectric material layer 033 can be patterned or provided on the entire surface as shown in the figure (e.g., coated on the entire surface). Compared with patterning, the effect of step difference can be ignored in the case of coating on the entire surface.

[0106] In this embodiment 1, referring to the process flow chart shown in FIG6 , it can be seen that the preparation sequence of the electrophoretic display may include:

[0107] Step 601: forming a third electrode of the acoustic wave emitting unit.

[0108] 4 and 5 , the third electrode 031 (ie, the lower electrode pattern) may be formed below the display unit 01 .

[0109] Step 602: Form a piezoelectric material layer.

[0110] 4 and 5 , the piezoelectric material layer 033 may be formed on a side of the third electrode 031 close to the display unit 01 .

[0111] Step 603: Form various layers in the TFT substrate.

[0112] 4 and 5 , the layers of the TFT substrate (including the bottom conductive layer 021 and the middle layer 022 ) can be formed on the side of the piezoelectric material layer 033 away from the third electrode 031 . Furthermore, the light-shielding conductive layer LS and the gate conductive layer GATE can be reused as the fourth electrode 032 .

[0113] Step 604: forming a first electrode and a data line.

[0114] 4 and 5 , the first electrode 011 (ie, pixel electrode) and the data line Data1 (ie, source-drain conductive layer 023 ) may be formed in the same layer on the side of the display driving unit 02 away from the piezoelectric material layer 033 , and a TFT backplane may be obtained.

[0115] Step 605: forming a dielectric layer.

[0116] 4 and 5 , a dielectric layer 014 may be formed on the side of the first electrode 011 and the data line Data1 away from the intermediate layer 022. Subsequently, an electrophoretic display layer 012 and a second electrode 013 may be sequentially formed on the side of the dielectric layer 014 away from the first electrode 011.

[0117] Furthermore, as can be seen from the fabrication process shown in FIG6 , the fourth electrode 032 and the conductive structure in the display driver unit 02 can be formed simultaneously. Thus, when fabricating the acoustic wave emitting unit 03, the fourth electrode 032 and the shared conductive structure can be fabricated simultaneously using the same masking process. If the piezoelectric material layer 033 can be formed by coating, only one additional masking process is required to fabricate the third electrode 031.

[0118] It should be noted that, in conjunction with FIG. 4 and FIG. 5 , it can be seen that the patterns of the light-shielding conductive layer LS / gate conductive layer GATE shared by the third electrode 031 and the fourth electrode 032 can be consistent. That is, the third electrode 031, the piezoelectric material layer 033, and the fourth electrode 032 can overlap with each other as shown.

[0119] Furthermore, referring to FIG5 , it can be seen that vias K1 are provided in the source / drain conductive layer 023 and the first electrode 011 to facilitate connection with other layers. Furthermore, the space within each first electrode 011 can be referred to as a sub-pixel space. Accordingly, as shown in FIG5 , multiple sub-pixel spaces can be arranged in an array to form multiple sub-pixels including the first electrode 011. The same applies to the following embodiments and will not be further described.

[0120] Implementation 2:

[0121] The fourth electrode 032 may be shared with the first electrode 011. Furthermore, the third electrode 031 and the source-drain conductive layer 023 (which may refer to the data line Data1, and the following embodiments are similar and will not be described in detail) may be located in different layers.

[0122] For example, based on this embodiment, FIG7 shows a schematic structural diagram of another electrophoretic display, and FIG8 shows a layout of the structure shown in FIG7 . Referring to FIG7 and FIG8 , it can be seen that the third electrode 031 and the piezoelectric material layer 033 can be located on the side of the intermediate layer 022 away from the underlying conductive layer 021, and the third electrode 031, the piezoelectric material layer 033, and the fourth electrode 032 can be stacked in sequence in a direction away from the intermediate layer 022. The piezoelectric material layer 033 and the third electrode 031 can have a via K0 that exposes the intermediate layer 022. The source-drain conductive layer 023 and the first electrode 011 can overlap the intermediate layer 022 through the via K0. Accordingly, the first electrode 011 and the third electrode 031 can control the piezoelectric material layer 033 to transmit an acoustic wave signal.

[0123] That is, the pixel electrode can be reused as the fourth electrode 032 , and the third electrode 031 and the first electrode 011 can be integrated into the same pixel space, which provides a larger layout space for design adjustment.

[0124] In this embodiment 2, referring to the process flow chart shown in FIG9 , it can be seen that the preparation sequence of the electrophoretic display may include:

[0125] Step 901: forming a TFT substrate.

[0126] 7 and 8 , a TFT substrate may be formed below the display unit 01. For example, as described in the above embodiment, the display driving unit 02 may be formed using at least one of the A-Si / Oxide / LTPS processes, which will not be described in detail in the following embodiments.

[0127] Step 902: forming a third electrode of the acoustic wave emitting unit.

[0128] 7 and 8 , a third electrode 031 may be formed between the TFT substrate and the display unit 01. Furthermore, a via hole needs to be provided through the third electrode 031 to expose the TFT substrate, avoiding the connection hole space where the first electrode 011 overlaps the TFT substrate. This means that the third electrode 031 needs to be patterned.

[0129] Step 903: forming a piezoelectric material layer.

[0130] 7 and 8 , the piezoelectric material layer 033 may be formed on the side of the third electrode 031 away from the TFT substrate. Furthermore, a via hole needs to be formed through the piezoelectric material layer 033 to expose the TFT substrate, avoiding the connection hole space where the first electrode 011 overlaps the TFT substrate. This means that the piezoelectric material layer 033 needs to be patterned.

[0131] Step 904: forming a first electrode and a data line.

[0132] 7 and 8 , the first electrode 011 (ie, pixel electrode) and the data line Data1 (ie, source-drain conductive layer 023 ) may be formed in the same layer on the side of the piezoelectric material layer 033 away from the third electrode 031 , and a TFT backplane may be obtained.

[0133] It should be noted that, as shown in Figures 7 and 8, the orthographic projections of the first electrode 011 and the third electrode 031 on the piezoelectric material layer 033 overlap, so as to reliably drive the piezoelectric material layer 033 to emit acoustic wave signals, while the orthographic projections of the data line Data1 and the third electrode 031 on the piezoelectric material layer 033 do not overlap.

[0134] Step 905: forming a dielectric layer.

[0135] 7 and 8 , a dielectric layer 014 may be formed on the side of the first electrode 011 and the data line Data1 in the same layer away from the TFT substrate. Subsequently, an electrophoretic display layer 012 and a second electrode 013 may be sequentially formed on the side of the dielectric layer 014 away from the first electrode 011.

[0136] Furthermore, as can be seen from the fabrication process shown in FIG9 , the fourth electrode 032 and the shared first electrode 011 can be formed simultaneously. Thus, when fabricating the acoustic wave emitting unit 03, the fourth electrode 032 and the shared first electrode 011 can be fabricated simultaneously using the same masking process. If the piezoelectric material layer 033 can be formed by coating, only one additional masking process is required to fabricate the third electrode 031. Furthermore, because the piezoelectric material layer 033 is located below the first electrode 011 and above the TFT substrate, the process must carefully control the effect of the thickness of the piezoelectric material layer 033 on the film layer of the first electrode 011.

[0137] Implementation 3:

[0138] The fourth electrode 032 may be shared by the first electrode 011 , and the third electrode 031 may be shared by the source-drain conductive layer 023 .

[0139] For example, based on this embodiment, FIG10 shows a schematic structural diagram of another electrophoretic display, and FIG11 shows a layout of the structure shown in FIG10 . Referring to FIG10 and FIG11 , it can be seen that the piezoelectric material layer 033 can be located between the source-drain conductive layer 023 and the first electrode 011. Accordingly, the data line Data1 formed by the first electrode 011 and the source-drain conductive layer 023 can control the piezoelectric material layer 033 to emit an acoustic wave signal. Here, the data line Data1 requires high-frequency and high-voltage refresh, that is, the data line Data1 needs to provide a signal that excites the piezoelectric material layer 033 to emit an acoustic wave.

[0140] That is, the pixel electrode can be reused as the fourth electrode 032, and the data line Data1 can be reused as the third electrode 031. Accordingly, when preparing the acoustic wave emission unit 03, it is only necessary to form the piezoelectric material layer 033 in the gap between the pixel electrode and the data line Data1.

[0141] In this embodiment 3, referring to the process flow chart shown in FIG12 , it can be seen that the preparation sequence of the electrophoretic display may include:

[0142] Step 1201: forming a TFT substrate.

[0143] 10 and 11 , a TFT substrate may be formed below the display unit 01 .

[0144] Step 1202: forming a first electrode and a data line.

[0145] 10 and 11 , the first electrode 011 (ie, pixel electrode) and the data line Data1 (ie, source-drain conductive layer 023 ) may be formed in the same layer on a side of the TFT substrate close to the display unit 01 .

[0146] Step 1203: Fill the space between the first electrode and the data line with a piezoelectric material to form a piezoelectric material layer.

[0147] Optionally, in this embodiment, the piezoelectric material layer may be patterned or not.

[0148] Step 1204: forming a dielectric layer.

[0149] 10 and 11 , a dielectric layer 014 may be formed on the side of the first electrode 011 and the data line Data1 in the same layer away from the TFT substrate. Subsequently, an electrophoretic display layer 012 and a second electrode 013 may be sequentially formed on the side of the dielectric layer 014 away from the first electrode 011.

[0150] 12 , since the third electrode 031 and the fourth electrode 032 are formed simultaneously with the data line Data1 and the first electrode 011 , respectively, when preparing the acoustic wave emission unit 03 , it is only necessary to fill the piezoelectric material without using a mask process.

[0151] Implementation 4:

[0152] The fourth electrode 032 may be shared with the first electrode 011. Furthermore, the third electrode 031 may be located in the same layer as the source-drain conductive layer 023, and may be spaced apart from the source-drain conductive layer 023 and the first electrode 011.

[0153] For example, based on this embodiment, FIG13 shows a schematic structural diagram of another electrophoretic display, and FIG14 shows a layout of the structure shown in FIG13 . Referring to FIG13 and FIG14 , it can be seen that the third electrode 031 and the source-drain conductive layer 023 can be located on the same layer. Furthermore, the third electrode 031 can be located on the side of the first electrode 011 away from the source-drain conductive layer 023, and the piezoelectric material layer 033 can be located between the first electrode 011 and the third electrode 031. Accordingly, the first electrode 011 and the third electrode 031 can control the piezoelectric material layer 033 to emit an acoustic wave signal.

[0154] That is, the pixel electrode can be reused as the fourth electrode 032 , and the third electrode 031 can be separately provided on the same layer as the source / drain conductive layer 023 and the first electrode 011 .

[0155] In this embodiment 4, referring to the process flow chart shown in FIG15 , it can be seen that the preparation sequence of the electrophoretic display may include:

[0156] Step 1501: forming a TFT substrate.

[0157] 13 and 14 , a TFT substrate may be formed below the display unit 01 .

[0158] Step 1502: forming a first electrode, a data line and a third electrode.

[0159] 13 and 14 , the first electrode 011 (ie, pixel electrode), the data line Data1 (ie, source-drain conductive layer 023 ), and the third electrode 031 may be formed in the same layer on the side of the TFT substrate close to the display unit 01 .

[0160] Step 1503: Fill the space between the first electrode and the third electrode with a piezoelectric material and perform patterning to form a piezoelectric material layer.

[0161] 13 and 14 , it can be seen that the piezoelectric material may also be filled on the side of the third electrode 031 away from the first electrode 011 , that is, the piezoelectric material may be filled between the third electrode 031 and the data line Data in another sub-pixel space.

[0162] Step 1504: forming a dielectric layer.

[0163] 13 and 14 , a dielectric layer 014 may be formed on the side of the first electrode 011, data line Data1, and third electrode 031 in the same layer that is away from the TFT substrate. Subsequently, an electrophoretic display layer 012 and a second electrode 013 may be sequentially formed on the side of the dielectric layer 014 that is away from the first electrode 011.

[0164] In addition, combined with the manufacturing process shown in Figure 15, it can be seen that the fourth electrode 032 and the first electrode 011 can be formed simultaneously, and the third electrode 031 and the first electrode 011 can be formed on the same layer. Therefore, when manufacturing the acoustic wave emission unit 03, the first electrode 011, the fourth electrode 032, and the third electrode 031 can be simultaneously manufactured using the same mask process. However, in this embodiment, the third electrode 031 needs to be arranged separately, which inevitably affects the pixel space.

[0165] Implementation 5:

[0166] Based on the above-described embodiments 3 and 4, the piezoelectric material layer 033 may also be located between the first electrode 011 and the dielectric layer 014. Furthermore, the orthographic projection of the piezoelectric material layer 033 on the intermediate layer 022 overlaps the orthographic projections of the layers located on the same layer between the piezoelectric material layer 033 and the intermediate layer 022. In other words, the piezoelectric material layer 033 may be formed by coating the entire layer with the piezoelectric material without undergoing patterning.

[0167] For example, based on this embodiment, taking the structure shown in FIG4 as an example, FIG16 shows a schematic structural diagram of another electrophoretic display, and FIG17 shows a layout of the structure shown in FIG16. Referring to FIG16 and FIG17 , it can be seen that the piezoelectric material layer 033 covers the data line Data1, the first electrode 011, and the third electrode 031.

[0168] In this embodiment 5, referring to the process flow chart shown in FIG18 , it can be seen that the preparation sequence of the electrophoretic display may include:

[0169] Step 1801: forming a TFT substrate.

[0170] 16 and 17 , a TFT substrate may be formed below the display unit 01 .

[0171] Step 1802: forming a first electrode, a data line and a third electrode.

[0172] 16 and 17 , the first electrode 011 (ie, pixel electrode), the data line Data1 (ie, source-drain conductive layer 023 ), and the third electrode 031 may be formed in the same layer on the side of the TFT substrate close to the display unit 01 .

[0173] Step 1803: coating the entire surface with piezoelectric material to form a piezoelectric material layer.

[0174] Referring to Figures 16 and 17 , a piezoelectric material layer can be formed by coating the entire surface of the first electrode 011, data line Data1, and third electrode 031 on the same layer, facing away from the TFT substrate. In other words, in this embodiment, the piezoelectric material layer need not be patterned, thus reducing design complexity.

[0175] Step 1804: forming a dielectric layer.

[0176] 16 and 17 , a dielectric layer 014 may be formed on the side of the piezoelectric material layer away from the TFT substrate, and then an electrophoretic display layer 012 and a second electrode 013 may be formed on the side of the dielectric layer 014 away from the first electrode 011 .

[0177] Implementation 6:

[0178] As described in the above embodiment, the display unit 01 may further include a dielectric layer 014 located between the first electrode 011 and the electrophoretic display layer 012. Furthermore, based on the above-described fifth embodiment, the dielectric layer 014 and the piezoelectric material layer 033 in this embodiment can be shared. In other words, the piezoelectric material layer 033 formed by full-surface coating can be reused directly as the dielectric layer 014, eliminating the need for a separate dielectric layer 014.

[0179] For example, based on this embodiment, a schematic structural diagram of another electrophoretic display is shown in FIG19. The layout of the structure shown in FIG19 can be referred to FIG17 and is not shown again.

[0180] In this embodiment 6, referring to the process flow chart shown in FIG20 , it can be seen that the preparation sequence of the electrophoretic display may include:

[0181] Step 2001: forming a TFT substrate.

[0182] 19 , a TFT substrate may be formed below the display unit 01 .

[0183] Step 2002: forming a first electrode, a data line and a third electrode.

[0184] 19 , the first electrode 011 (ie, pixel electrode), the data line Data1 (ie, source-drain conductive layer 023 ) and the third electrode 031 may be formed in the same layer on the side of the TFT substrate close to the display unit 01 .

[0185] Step 2003: coating the entire surface with piezoelectric material to form a piezoelectric material layer.

[0186] Referring to Figure 19 , a piezoelectric material layer can be formed by coating the entire surface of the first electrode 011, data line Data1, and third electrode 031 on the same layer, facing away from the TFT substrate. In other words, in this embodiment, the piezoelectric material layer does not need to be patterned, thus reducing design complexity.

[0187] Afterwards, the electrophoretic display layer 012 and the second electrode 013 may be sequentially formed on a side of the piezoelectric material layer 033 away from the first electrode 011 .

[0188] Implementation 7:

[0189] On the basis of the above-mentioned embodiment 5, that is, the third electrode 031 is located in the same layer as the source-drain conductive layer 023, and is spaced apart from the source-drain conductive layer 023 and the first electrode 011, and the third electrode 031 is located on the side of the first electrode 011 away from the source-drain conductive layer 023, as can be seen from the structural schematic diagram of another electrophoretic display shown in FIG21, the display unit 01 described in the embodiment of the present disclosure may further include:

[0190] The electrode protection layer 015 is located between the first electrode 011 and the dielectric layer 014 , and the electrode protection layer 015 can cover the top surface of the first electrode 011 close to the dielectric layer 014 and the side surface of the first electrode 011 close to the third electrode 031 .

[0191] Optionally, the material of the electrode protection layer 015 can be a transparent conductive material, such as ITO. In the display, the electrode protection layer 015 is mostly set in the bonding area to protect the metal material layer from corrosion, and the electrode protection layer 015 can also be retained in the display area, which can be directly connected to the pixel electrode. Therefore, as shown in Figure 21, the electrode protection layer 015 overlaps with the top surface of the first electrode 011 close to the dielectric layer 014 and the side of the first electrode 011 close to the third electrode 031, and can overlap with the top surface of the third electrode 031 close to the dielectric layer 014 and the side of the third electrode 031 close to the first electrode 011. On this basis, the fourth electrode 032 can be shared with the electrode protection layer 015, and then the piezoelectric material can be filled between the overlap of the electrode protection layer 015 and the third electrode 031 to form a piezoelectric material layer 033. Figure 22 also schematically shows the layout of the structure shown in Figure 21.

[0192] In this embodiment 7, referring to the process flow chart shown in FIG23 , it can be seen that the preparation sequence of the electrophoretic display may include:

[0193] Step 2301: forming a TFT substrate.

[0194] 21 and 22 , a TFT substrate may be formed below the display unit 01 .

[0195] Step 2302: forming a first electrode, a data line and a third electrode.

[0196] 21 and 22 , the first electrode 011 (ie, pixel electrode), the data line Data1 (ie, source-drain conductive layer 023 ), and the third electrode 031 may be formed in the same layer on the side of the TFT substrate close to the display unit 01 .

[0197] Step 2303: coating a piezoelectric material and patterning the third electrode to form a piezoelectric material layer.

[0198] 21 and 22 , a piezoelectric material may be coated on a side of the first electrode 011 , the data line Data1 , and the third electrode 031 in the same layer away from the TFT substrate to form a piezoelectric material layer.

[0199] Step 2304: forming an electrode protection layer.

[0200] 21 and 22 , the electrode protection layer 015 may be formed on a side of the piezoelectric material layer away from the third electrode 031 . Furthermore, the electrode protection layer 015 may be reused as the fourth electrode 032 .

[0201] Step 2305: forming a dielectric layer.

[0202] 21 and 22 , a dielectric layer 014 may be formed on the side of the electrode protection layer 015 away from the TFT substrate. Subsequently, an electrophoretic display layer 012 and a second electrode 013 may be sequentially formed on the side of the dielectric layer 014 away from the first electrode 011.

[0203] In addition, in combination with the preparation process shown in Figure 23, it can be seen that the fourth electrode 032 and the electrode protection layer 015 can be formed at the same time, and the third electrode 031 and the first electrode 011 can be formed in the same layer. Therefore, when preparing the acoustic wave emission unit 03, the first electrode 011 and the third electrode 031 can be prepared simultaneously using the same layer Mask process, and the electrode protection layer 015 and the fourth electrode 032 can be prepared simultaneously using the same layer Mask process.

[0204] It should be noted that the above-mentioned embodiment 1 of the integrated arrangement can also be considered as the acoustic wave emitting unit 03, the display driver unit 02, and the display unit 01 being stacked in sequence; that is, the acoustic wave emitting unit 03 is attached to the side of the display driver unit 02 away from the display unit 01. The above-mentioned embodiments 2 to 7 of the integrated arrangement can also be considered as the display driver unit 02, the acoustic wave emitting unit 03, and the display unit 01 being stacked in sequence; that is, the acoustic wave emitting unit 03 is attached between the display driver unit 02 and the display unit 01.

[0205] It should also be noted that the above embodiments are merely illustrative examples. For display drive units 02 / display units 01 with different structures, the integration method of the acoustic wave emitting unit 03 and the conductive structure can be different, as long as it can reliably drive the piezoelectric material layer 033 to emit acoustic wave signals.

[0206] In summary, an embodiment of the present disclosure provides an electrophoretic display. The electrophoretic display includes a display unit, a display driving unit, and an acoustic wave emitting unit. The display driving unit is capable of providing a display driving signal to the display unit to control the distribution pattern of multiple electrophoretic particles included in the electrophoretic display layer in the display unit. The acoustic wave emitting unit is capable of emitting an acoustic wave signal to the display unit to control the distribution pattern of multiple electrophoretic particles. In this way, an acoustic wave signal can be emitted by the acoustic wave emitting unit between different picture frames to quickly stimulate the jitter of multiple electrophoretic particles to be in a balanced distribution pattern, thereby avoiding display abnormalities such as afterimages in the electrophoretic display and ensuring that the display quality of the electrophoretic display is good.

[0207] FIG24 is a driving method of an electrophoretic display provided by an embodiment of the present disclosure, which is applied to the electrophoretic display described in the above embodiment. As shown in FIG24 , the method includes:

[0208] Step 2401, multi-frame display stage, in each frame display stage, the display driving unit provides a display driving signal to the first electrode in the display unit, controls the multiple electrophoretic particles included in the electrophoretic display layer in the display unit to be in a display distribution form based on the display driving signal and the electrical signal received by the second electrode in the display unit, and drives the display unit to refresh to display the picture.

[0209] Step 2402, a blanking phase between each two adjacent display phases. In the blanking phase, the acoustic wave emission unit emits an acoustic wave signal to the electrophoretic display layer to control the distribution of the multiple electrophoretic particles to switch from a display distribution to a balanced distribution.

[0210] Since the driving method of the electrophoretic display can have substantially the same technical effects as the electrophoretic display described in the previous embodiment, the technical effects of the driving method will not be repeatedly described here for the purpose of brevity.

[0211] FIG25 is a method for preparing an electrophoretic display provided by an embodiment of the present disclosure, which is applied to the electrophoretic display described in the above embodiment. As shown in FIG25 , the method includes:

[0212] Step 2501: forming a display unit, wherein the formed display unit includes a first electrode, an electrophoretic display layer, and a second electrode stacked in sequence.

[0213] Step 2502: forming a display driving unit on one side of the display unit, and the formed display driving unit is used to provide a display driving signal to the first electrode in the display unit.

[0214] Step 2503: forming an acoustic wave emitting unit on one side of the display unit, and the formed acoustic wave emitting unit is used to emit an acoustic wave signal to the electrophoretic display layer in the display unit.

[0215] The formed electrophoretic display layer includes a plurality of electrophoretic particles, and the distribution forms of the plurality of electrophoretic particles are used to change under the control of the display driving signal and the electric signal received by the second electrode, and are used to change under the control of the acoustic wave signal.

[0216] It should be noted that, for electrophoretic displays with different structures, the preparation methods can refer to the above-mentioned device-side embodiments, which will not be described in detail here.

[0217] Since the preparation method can have substantially the same technical effects as the electrophoretic display described in the previous embodiment, the technical effects of the preparation method will not be repeatedly described here for the purpose of brevity.

[0218] Fig. 26 is a schematic structural diagram of a display device provided by an embodiment of the present disclosure. As shown in Fig. 26, the display device includes: a power supply component 10, and an electrophoretic display 00 as described in the above embodiment.

[0219] The power supply assembly 10 is coupled to the electrophoretic display 00 to supply power to the electrophoretic display 00 .

[0220] Optionally, the electrophoretic display 00 may include an electronic reader or electronic paper.

[0221] It should be noted that the terms used in the examples of this disclosure are only used to explain the examples and are not intended to limit the present disclosure. Unless otherwise defined, technical terms or scientific terms used in the embodiments of this disclosure should have the common meanings understood by people with ordinary skills in the field to which this disclosure belongs.

[0222] For example, the terms "first," "second," or "third," and similar terms used in the patent specification and claims of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. "Connected" or "coupled" refers to an electrical connection.

[0223] Likewise, the words “a” or “an” and the like do not denote a limitation of quantity, but rather denote the presence of at least one.

[0224] Words such as “include” or “comprising” mean that the elements or objects preceding “include” or “comprising” include the elements or objects listed after “include” or “comprising” and their equivalents, and do not exclude other elements or objects.

[0225] “Up,” “down,” “left,” or “right” 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.

[0226] The above description is merely an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. An electrophoretic display, comprising: The display unit comprises a first electrode, an electrophoretic display layer and a second electrode stacked in sequence; A display driving unit, located at one side of the display unit, for providing a display driving signal to the first electrode in the display unit; an acoustic wave transmitting unit, located at one side of the display unit, and configured to transmit an acoustic wave signal to the electrophoretic display layer in the display unit; The electrophoretic display layer includes a plurality of electrophoretic particles, and the distribution forms of the plurality of electrophoretic particles are used to change under the control of the display driving signal and the electrical signal received by the second electrode, and are used to change under the control of the acoustic wave signal.

2. The electrophoretic display according to claim 1, wherein: The sound wave emitting unit is used to emit a sound wave signal to the electrophoretic display layer during a blanking phase between two adjacent frame display phases, so as to control the plurality of electrophoretic particles to be in a balanced distribution state.

3. The electrophoretic display according to claim 2, wherein: The sound wave transmitting unit includes: an ultrasonic wave transmitting unit; the sound wave signal transmitted by the sound wave transmitting unit includes: an ultrasonic wave signal.

4. The electrophoretic display according to any one of claims 1 to 3, wherein: The display unit further includes: a dielectric layer located between the first electrode and the electrophoretic display layer; The sound wave emitting unit comprises: a third electrode and a fourth electrode arranged opposite to each other, and a piezoelectric material layer located between the third electrode and the fourth electrode; the piezoelectric material layer is used to emit a sound wave signal under the control of a piezoelectric excitation signal received by the third electrode and an electrical signal received by the fourth electrode.

5. The electrophoretic display according to claim 4, wherein: The sound wave emitting unit and the display driving unit are independent of each other and attached to each other; Furthermore, the acoustic wave emitting unit and the display driving unit are sequentially stacked in a direction close to the display unit, and the third electrode, the piezoelectric material layer and the fourth electrode in the acoustic wave emitting unit are stacked in a direction close to the display unit. The layers are stacked sequentially in a direction close to the display driving unit.

6. The electrophoretic display according to claim 4, wherein: The display driving unit comprises: a bottom conductive layer, an intermediate layer and a source-drain conductive layer stacked in sequence in a direction close to the display unit, and the source-drain conductive layer and the first electrode in the display unit are located in the same layer and spaced from each other; Wherein, at least one of the third electrode and the fourth electrode included in the acoustic wave emitting unit is shared with the conductive structure in the display driving unit or the conductive structure in the display unit.

7. The electrophoretic display according to claim 6, wherein: The bottom conductive layer includes: a gate conductive layer, and the fourth electrode is shared with the gate conductive layer; or the bottom conductive layer includes: a light-shielding conductive layer and a gate conductive layer stacked in sequence in a direction close to the middle layer, and the fourth electrode is shared with the light-shielding conductive layer; Furthermore, the third electrode, the piezoelectric material layer and the fourth electrode are stacked in sequence along a direction approaching the display unit.

8. The electrophoretic display according to claim 6, wherein: The fourth electrode is shared with the first electrode; and the third electrode satisfies any of the following conditions: The third electrode and the source-drain conductive layer are located in different layers; The third electrode is shared by the source-drain conductive layer; The third electrode is located in the same layer as the source-drain conductive layer, and is spaced apart from the source-drain conductive layer and the first electrode.

9. The electrophoretic display according to claim 8, wherein: The third electrode and the source-drain conductive layer are located in different layers; Furthermore, the third electrode and the piezoelectric material layer are located on a side of the intermediate layer away from the underlying conductive layer, and the third electrode, the piezoelectric material layer and the fourth electrode are stacked in sequence in a direction away from the intermediate layer, and the piezoelectric material layer and the third electrode have vias exposing the intermediate layer, and the source-drain conductive layer and the first electrode are overlapped with the intermediate layer through the vias.

10. The electrophoretic display according to claim 8, wherein: The third electrode is shared by the source-drain conductive layer; Furthermore, the piezoelectric material layer is located between the source-drain conductive layer and the first electrode.

11. The electrophoretic display according to claim 8, wherein: The third electrode and the source-drain conductive layer are located in the same layer; Furthermore, the third electrode is located on a side of the first electrode away from the source-drain conductive layer, and the piezoelectric material layer is located between the first electrode and the third electrode.

12. The electrophoretic display according to claim 10 or 11, wherein: The piezoelectric material layer is also located between the first electrode and the dielectric layer; Furthermore, the orthographic projection of the piezoelectric material layer on the intermediate layer covers the orthographic projections of the layers located on the same layer between the piezoelectric material layer and the intermediate layer on the intermediate layer.

13. The electrophoretic display according to claim 12, wherein: The dielectric layer is common to the piezoelectric material layer.

14. The electrophoretic display according to claim 6, wherein: The third electrode is located in the same layer as the source-drain conductive layer, and is spaced apart from the source-drain conductive layer and the first electrode, and is located on a side of the first electrode away from the source-drain conductive layer; The display unit further includes: an electrode protection layer located between the first electrode and the dielectric layer, and the electrode protection layer covers the top surface of the first electrode close to the dielectric layer and the side surface of the first electrode close to the third electrode; the fourth electrode is shared with the electrode protection layer.

15. A driving method of an electrophoretic display, applied to the electrophoretic display according to any one of claims 1 to 14; the method comprising: In a multi-frame display stage, in each frame display stage, the display driving unit provides a display driving signal to the first electrode in the display unit, controls the multiple electrophoretic particles included in the electrophoretic display layer in the display unit to be in a display distribution form based on the display driving signal and the electrical signal received by the second electrode in the display unit, and drives the display unit to refresh to display a picture; The blanking phase is located between each two adjacent frame display phases. During the blanking phase, the sound wave emitting unit The electrophoretic display layer emits an acoustic wave signal to control the distribution form of the plurality of electrophoretic particles to switch from the display distribution form to a balanced distribution form.

16. A method for preparing an electrophoretic display, used for preparing the electrophoretic display according to any one of claims 1 to 14; the method comprising: forming a display unit, wherein the formed display unit includes a first electrode, an electrophoretic display layer, and a second electrode stacked in sequence; A display driving unit is formed on one side of the display unit, and the formed display driving unit is used to provide a display driving signal to the first electrode in the display unit; An acoustic wave emitting unit is formed on one side of the display unit, and the acoustic wave emitting unit is used to emit an acoustic wave signal to the electrophoretic display layer in the display unit; The electrophoretic display layer formed includes a plurality of electrophoretic particles, and the distribution forms of the plurality of electrophoretic particles are used to change under the control of the display driving signal and the electrical signal received by the second electrode, and are used to change under the control of the acoustic wave signal.

17. A display device, comprising: A power supply assembly, and an electrophoretic display as claimed in any one of claims 1 to 14; The power supply component is coupled to the electrophoretic display and is used to supply power to the electrophoretic display.

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