Display substrate, driving method thereof, manufacturing method thereof, and display device

Abstract

A display substrate, a driving method and a manufacturing method thereof, and a display device. The display substrate comprises a substrate (10), a first conductive layer, a deformation layer (12), a second conductive layer and a nanoparticle layer (14) stacked on the substrate (10). The first conductive layer comprises a plurality of first electrodes (11), the second conductive layer comprises a plurality of second electrodes (13), and the nanoparticle layer (14) comprises a plurality of nanoparticles (141). The display substrate comprises a plurality of sub-pixels (Pi) defined by the intersection of the plurality of first electrodes (11) and the plurality of second electrodes (13). The orthogonal projection of the plurality of first electrodes (11) and the plurality of second electrodes (13) on the substrate (10) comprises a plurality of first overlapping areas (S1), and any first overlapping area (S1) and the orthogonal projection of at least one nanoparticle (141) on the substrate (10) comprise a second overlapping area (S2). The orthogonal projection of each sub-pixel (Pi) on the substrate (10) at least partially overlaps with at least two adjacent second overlapping areas (S2). The absorption wavelength of the nanoparticles (141) to light can be changed by adjusting the voltage between the first electrodes (11) and the second electrodes (13), and color display of the display substrate can be realized.

Description

TECHNICAL FIELD

[0001] The embodiment of the present disclosure relates to, but is not limited to, the technical field of display, and in particular to a display substrate, a driving method, a preparation method thereof, and a display device. BACKGROUND

[0002] In recent years, display panels have been widely applied in products with display functions such as mobile phones, computers, televisions (TVs), medical monitoring devices, and vehicle-mounted control devices. With the development of display technology, the requirements for the size, thinness, and other characteristics of display panels are becoming higher and higher. SUMMARY

[0003] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0004] The embodiment of the present disclosure provides a display substrate, comprising a substrate, and a first conductive layer, a deformation layer, a second conductive layer, and a nanoparticle layer which are stacked on the substrate;

[0005] The first conductive layer comprises a plurality of first electrodes, the second conductive layer comprises a plurality of second electrodes, and the nanoparticle layer comprises a plurality of nanoparticles; the display substrate comprises a plurality of sub-pixels defined by the plurality of first electrodes and the plurality of second electrodes intersecting each other;

[0006] The plurality of first electrodes and the plurality of second electrodes have a plurality of first overlapping areas in the orthographic projection on the substrate, and any one of the first overlapping areas has a second overlapping area with at least one of the nanoparticles in the orthographic projection on the substrate;

[0007] The orthographic projection of each sub-pixel on the substrate at least partially overlaps with at least two adjacent second overlapping areas.

[0008] In an exemplary embodiment, the orthographic projection of each sub-pixel on the substrate at least partially overlaps with two adjacent second overlapping areas; or, the orthographic projection of each sub-pixel on the substrate at least partially overlaps with three adjacent second overlapping areas.

[0009] In an exemplary embodiment, the display substrate comprises a plurality of pixel units, each pixel unit comprising a plurality of sub-pixels, and in the same pixel unit, the arrangement direction of the plurality of sub-pixels is different from the arrangement direction of at least two adjacent second overlapping areas in each sub-pixel.

[0010] In an exemplary embodiment, the above-mentioned display substrate further comprises a black matrix layer, which is arranged between the second conductive layer and the nanoparticle layer, or the black matrix layer is arranged on the side of the nanoparticle layer away from the second conductive layer.

[0011] The black matrix layer comprises a plurality of black matrix structures arranged between two adjacent sub-pixels.

[0012] In an exemplary embodiment, in a plane in which the display substrate is located, the first electrode is a strip structure extending in a direction forming a first included angle with the first direction, and the second electrode is a strip structure extending in a direction forming a second included angle with the first direction, the first included angle and the second included angle being in a range of 0° to 180°.

[0013] In an exemplary embodiment, in a plane in which the display substrate is located, the first electrode extends in a second direction, and the second electrode extends in a first direction, the first direction being perpendicular to the second direction.

[0014] In an exemplary embodiment, the first electrode and the second electrode are both arc-shaped, the bending direction of the arc shape of the first electrode is opposite to the bending direction of the arc shape of the second electrode, and the plurality of sub-pixels are arranged along the arc shape.

[0015] In an exemplary embodiment, the first electrode is formed on the substrate by an electron beam evaporation method.

[0016] In an exemplary embodiment, the first electrode and the second electrode are both light-transmitting structures.

[0017] In an exemplary embodiment, the first electrode is a light-reflecting structure, and the second electrode is a light-transmitting structure.

[0018] In an exemplary embodiment, the display substrate further comprises a reflective layer arranged on a side of the substrate away from the first conductive layer.

[0019] In an exemplary embodiment, the display substrate further comprises a reflective layer and an insulating layer, the reflective layer is arranged between the substrate and the insulating layer, and the insulating layer is arranged between the reflective layer and the first conductive layer.

[0020] In an exemplary embodiment, the nanoparticles are silver nanoparticles.

[0021] In an exemplary embodiment, the thickness of the nanoparticles is 30 nm to 80 nm, and the width of the nanoparticles is 45 nm to 65 nm.

[0022] In an exemplary embodiment, the material of the deformation layer is polyacrylate or silicone rubber.

[0023] In an exemplary embodiment, the nanoparticles are periodically arranged, and the distance between the center positions of two adjacent nanoparticles is 200 nm to 400 nm.

[0024] In an example embodiment, a distance between a side of the nanoparticles facing the second conductive layer and a side of the first conductive layer facing the deformation layer is 2-20 nanometers.

[0025] The display device according to any one of the above embodiments is also provided.

[0026] The display device according to any one of the above embodiments is also provided.

[0027] The display device according to any one of the above embodiments is also provided.

[0028] A first conductive layer is formed on one side of a substrate, the first conductive layer comprising a plurality of first electrodes arranged in parallel;

[0029] A deformation layer is formed on a side of the first conductive layer away from the substrate;

[0030] A second conductive layer is formed on a side of the deformation layer away from the first conductive layer, the second conductive layer comprising a plurality of second electrodes arranged in parallel;

[0031] A nanoparticles layer is formed on a side of the second conductive layer away from the deformation layer, the nanoparticles layer comprising a plurality of nanoparticles;

[0032] The display device according to any one of the above embodiments is also provided.

[0033] In an example embodiment, the first electrodes are formed on the substrate using an electron beam evaporation process.

[0034] In an example embodiment, the deformation layer is formed on a side of the first conductive layer away from the substrate using a nano self-assembly process.

[0035] In an example embodiment, the nanoparticles layer is formed on a side of the second conductive layer away from the deformation layer using a point spin coating process.

[0036] Other aspects can become apparent from the following drawings and detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings are included to provide a further understanding of the technical solution of the present disclosure, and constitute a part of the specification, and are used together with the embodiments of the present disclosure to explain the technical solution of the present disclosure, and do not constitute a limitation on the technical solution of the present disclosure. The shape and size of each component in the drawings do not reflect the true proportion, and the purpose is only to schematically illustrate the present disclosure.

[0038] Figure 1 A schematic diagram of a flat structure of a display substrate provided by an embodiment of the present disclosure is shown;

[0039] Figure 2 A schematic diagram of a flat structure of a display substrate provided by an embodiment of the present disclosure is shown; Figure 1 A schematic diagram of a cross-sectional structure at A-A position is shown;

[0040] Figure 3a A schematic diagram of a flat structure of a display substrate provided by an exemplary embodiment of the present disclosure is shown;

[0041] Figure 3b A schematic diagram of a flat structure of a display substrate provided by an exemplary embodiment of the present disclosure is shown;

[0042] Figure 3c A schematic diagram of a cross-sectional structure at a sub-pixel position of a display substrate provided by an exemplary embodiment of the present disclosure is shown;

[0043] Figure 4a A schematic diagram of a flat structure of a display substrate provided by an exemplary embodiment of the present disclosure is shown;

[0044] Figure 4b A schematic diagram of a flat structure of a display substrate provided by an exemplary embodiment of the present disclosure is shown;

[0045] Figure 4c A schematic diagram of a cross-sectional structure at a sub-pixel position of a display substrate provided by an exemplary embodiment of the present disclosure is shown;

[0046] Figure 5a A schematic diagram of a flat structure of a display substrate provided by an exemplary embodiment of the present disclosure is shown;

[0047] Figure 5b A schematic diagram of a flat structure of a display substrate provided by an exemplary embodiment of the present disclosure is shown; Figure 5a A schematic diagram of a cross-sectional structure at A1-A1 position is shown;

[0048] Figure 6a A schematic diagram of an arrangement mode of a first electrode and a second electrode provided by an exemplary embodiment of the present disclosure is shown;

[0049] Figure 6b A schematic diagram of an arrangement mode of a first electrode and a second electrode provided by an exemplary embodiment of the present disclosure is shown;

[0050] Figure 6c A schematic diagram of an arrangement of a first electrode and a second electrode is shown according to an exemplary embodiment of the present disclosure;

[0051] Figure 6d A schematic diagram of an arrangement of a first electrode and a second electrode is shown according to an exemplary embodiment of the present disclosure;

[0052] Figure 6e A schematic diagram of an arrangement of a first electrode and a second electrode is shown according to an exemplary embodiment of the present disclosure;

[0053] Figure 6f A schematic diagram of an arrangement of a first electrode and a second electrode is shown according to an exemplary embodiment of the present disclosure;

[0054] Figure 7 A schematic diagram of a cross-sectional structure of a display substrate is shown according to an exemplary embodiment of the present disclosure;

[0055] Figure 8 A schematic diagram of a cross-sectional structure of a display substrate is shown according to an exemplary embodiment of the present disclosure;

[0056] Figure 9a A graph of a relationship between a wavelength of reflected / transmitted light and a thickness of a nanoparticle is shown according to an exemplary embodiment of the present disclosure;

[0057] Figure 9b A schematic diagram of a relationship between a wavelength of reflected / transmitted light and a width of a nanoparticle is shown according to an exemplary embodiment of the present disclosure;

[0058] Figure 9c A schematic diagram of a relationship between a wavelength of reflected / transmitted light and a period of a nanoparticle is shown according to an exemplary embodiment of the present disclosure;

[0059] Figure 9d A schematic diagram of a relationship between a wavelength of reflected / transmitted light and an incident angle of light is shown according to an exemplary embodiment of the present disclosure;

[0060] Figure 9e A schematic diagram of a relationship between a wavelength of reflected / transmitted light and a distance M between a nanoparticle and a first electrode is shown according to an exemplary embodiment of the present disclosure;

[0061] Figure 9f A schematic diagram of a cross-sectional structure of a display substrate is shown according to an exemplary embodiment of the present disclosure;

[0062] Figure 10 A schematic diagram of a planar structure of forming a pattern of a first conductive layer is shown according to an exemplary embodiment of the present disclosure;

[0063] Figure 11 Figure 10

[0064] Figure 12

[0065] Figure 13

[0066] Figure 14 Figure 13

[0067] Figure 15

[0068] Figure 16 Figure 15 DETAILED DESCRIPTION

[0069] Embodiments of the present disclosure will be described below in detail with reference to the accompanying drawings. The embodiments can be implemented in various different forms. It is readily apparent to those skilled in the art that the form and details of the embodiments can be changed to various forms without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be construed as being limited to the embodiments described below. The embodiments in the present disclosure and the features in the embodiments can be combined with each other as long as they do not conflict with each other. In order to keep the following description of the embodiments of the present disclosure clear and concise, detailed description of some known functions and known components will be omitted. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures can be referred to the generally designed structures

[0070] The proportions of the drawings in the present disclosure can be used as a reference in the actual process, but are not limited thereto. For example, the thickness and interval of each film layer, the width and interval of each signal line, can be adjusted according to the actual situation. The drawings described in the present disclosure are only schematic structural diagrams, and one embodiment of the present disclosure is not limited to the shapes or values shown in the drawings.

[0071] In the present specification, ordinal numbers such as "first", "second", and "third" are provided in order to avoid confusion of components, and are not intended to be limiting in terms of numbers.

[0072] ​​​​​​​​​In the present specification, the words "center", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like used to describe the positional relationship of constituent elements with reference to the drawings are used only to facilitate the description of the present specification and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the direction of each constituent element described. Therefore, it is not limited to the words described in the specification, and can be appropriately changed according to the situation.

[0073] In the present specification, unless explicitly specified and limited, the terms "mount", "connect", "connect" should be broadly understood. For example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate, or the connection between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0074] In the present specification, "electrically connected" includes the case where the constituent elements are connected together through an element having a certain electrical effect. The "element having a certain electrical effect" is not particularly limited as long as it can perform the transmission of electrical signals between the connected constituent elements. Examples of the "element having a certain electrical effect" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, other elements having one or more functions, and the like.

[0075] In the present specification, "parallel" means that the angle formed by two straight lines is -10° or more and 10° or less, so it can include the case where the angle is -5° or more and 5° or less. In addition, "perpendicular" means that the angle formed by two straight lines is 80° or more and 100° or less, so it can include the case where the angle is 85° or more and 95° or less.

[0076] In the present specification, "film" and "layer" can be interchanged. For example, "conductive layer" can be replaced by "conductive film". Similarly, "insulating film" can be replaced by "insulating layer".

[0077] In the present specification, a triangle, a rectangle, a trapezoid, a pentagon, or a hexagon, etc. are not strictly, and can be an approximate triangle, a rectangle, a trapezoid, a pentagon, or a hexagon, etc. There can be some small deformation due to tolerance, there can be an angle, an arc edge, and deformation, etc.

[0078] In the present disclosure, "about" means not strictly limited to the limit, allowing values within the range of process and measurement error.

[0079] The "thickness" in the present disclosure is the dimension of a film layer in the direction perpendicular to the substrate.

[0080] The thinness of a display panel is an important indicator for measuring the characteristics of the display panel. Currently, mainstream products in the display field include organic light emitting diode (OLED) display devices and liquid crystal display (LCD) devices. Both the OLED display device and the LCD device need to be controlled by a thin film transistor array (TFT) for signal control. The TFT array can be arranged on a substrate, which is referred to as a TFT array substrate. Since the TFT array substrate involves the preparation of multiple film layers, the preparation process is relatively complex. Moreover, the multiple film layers have a certain thickness, which leads to a relatively thick OLED display device and LCD device. Therefore, the ultra-thin degree of the display panel is not high.

[0081] The display substrate provided by the embodiments of the present disclosure can include a substrate, and a first conductive layer, a deformation layer, a second conductive layer and a nanoparticle layer stacked on the substrate.

[0082] The first conductive layer can include a plurality of first electrodes, the second conductive layer can include a plurality of second electrodes, and the nanoparticle layer can include a plurality of nanoparticles. The display substrate includes a plurality of sub-pixels defined by the intersection of the plurality of first electrodes and the plurality of second electrodes.

[0083] The plurality of first electrodes and the plurality of second electrodes have a plurality of first overlapping areas in the orthographic projection on the substrate. Any one of the first overlapping areas has a second overlapping area with at least one nanoparticle in the orthographic projection on the substrate.

[0084] The orthographic projection of each sub-pixel on the substrate at least partially overlaps with at least two adjacent second overlapping areas.

[0085] The display substrate provided by the embodiments of the present disclosure includes a first conductive layer, a deformation layer, a second conductive layer and a nanoparticle layer stacked on a substrate. The first conductive layer includes a plurality of first electrodes, and the second conductive layer includes a plurality of second electrodes. The plurality of first electrodes and the plurality of second electrodes have a plurality of first overlapping areas in the orthographic projection on the substrate. Any one of the first overlapping areas has a second overlapping area with at least one nanoparticle in the orthographic projection on the substrate. The orthographic projection of each sub-pixel on the substrate at least partially overlaps with at least two adjacent second overlapping areas. The display substrate provided by the embodiments of the present disclosure is simple to prepare and relatively thin, and overcomes the problems of complex preparation process and low ultra-thin degree of the existing display panel.

[0086] In the embodiments of the present disclosure, the first electrode and the second electrode can apply pressure to the deformation layer corresponding to the second overlapping area after applying a voltage, change the thickness of the deformation layer corresponding to the second overlapping area, and thus change the distance between the nanoparticles corresponding to the second overlapping area and the first electrode, and further change the absorption wavelength of the nanoparticles to light, so that the absorption of light can be changed by adjusting the voltage between the first electrode and the second electrode, and color display of the display substrate is realized. The display substrate provided in the embodiments of the present disclosure can not need to prepare a TFT array substrate, and the process is simple and the degree of thinness is high.

[0087] In the embodiments of the present disclosure, the nanoparticles, the deformation layer, and the first electrode form a structure with absorption characteristics, the energy of the absorbed light can be localized in the deformation layer between the nanoparticles and the first electrode, the light absorption characteristics of the nanoparticles, the deformation layer, and the first electrode, and the characteristics that the distance between the nanoparticles and the first electrode is related to the absorption of light of different wavelengths are utilized, the thickness of the deformation layer is changed by applying different voltages to the first electrode and the second electrode, and thus the absorption of light of different wavelengths by the nanoparticles and the deformation layer is changed, and reflection or transmission of light of different colors is realized.

[0088] In the example embodiments, as shown in Figure 1 and Figure 2 , as shown in Figure 2 , as shown in Figure 1 , the cross-sectional structure diagram of the A-A position in , the display substrate can include a substrate 10, and a first conductive layer, a deformation layer 12, a second conductive layer, and a nanoparticle layer 14 stacked on the substrate 10;

[0089] The first conductive layer can include a plurality of first electrodes 11, the second conductive layer can include a plurality of second electrodes 13, and the nanoparticle layer 14 can include a plurality of nanoparticles 141; the display substrate can include a plurality of sub-pixels Pi defined by the plurality of first electrodes 11 and the plurality of second electrodes 13.

[0090] The plurality of first electrodes 11 and the plurality of second electrodes 13 have a plurality of first overlapping areas S1 in the orthographic projection on the substrate 10, and any one first overlapping area S1 has a second overlapping area S2 in the orthographic projection on the substrate 10 with at least one nanoparticle 141.

[0091] The orthographic projection of each sub-pixel Pi on the substrate 10 at least partially overlaps with at least two adjacent second overlapping areas S2.

[0092] In the example embodiments, as shown in Figure 3a and 3b , the orthographic projection of each sub-pixel on the substrate 10 at least partially overlaps with two adjacent second overlapping areas S2.

[0093] In the example embodiments, as shown in Figure 3aand Figure 3b In the structure shown, the light-emitting principle is as follows: Figure 3c As shown, each sub-pixel Pi is controlled by nanoparticles 141, a first electrode 11, a second electrode 13, and a deformation layer 12 corresponding to two second overlapping regions S21 and S22 to absorb light of a corresponding wavelength, thereby reflecting or transmitting light of a corresponding color to achieve color display of the display substrate. For example, Figure 3c When the sub-pixel reflects or transmits red light, the second overlapping region S21 can be set to absorb green light, and the second overlapping region S22 can be set to absorb blue light. When the display substrate displays red light (reflective display or transmissive display) and provides a certain voltage to the second electrode 13, the first electrode 11 corresponding to the second overlapping region S21 is provided with a voltage to absorb green light. Then the position of the second overlapping region S21 reflects or transmits blue and red light. When the first electrode 11 corresponding to the second overlapping region S22 is provided with a voltage to absorb blue light, the position of the second overlapping region S22 reflects or transmits green and red light. The energy of the reflected or transmitted red light is greater than the energy of the green and blue light, so that the sub-pixel Pi displays red visually.

[0094] In another implementation, such as Figure 4a and Figure 4b As shown, the orthographic projection of each sub-pixel onto the substrate 10 at least partially overlaps with the three adjacent second overlapping regions S2.

[0095] exist Figure 4a and Figure 4b In the structure shown, the light-emitting principle is as follows: Figure 4c As shown, each sub-pixel Pi is controlled by nanoparticles 141, a first electrode 11, a second electrode 13, and a deformation layer 12 corresponding to three second overlapping regions S21, S22, and S23 to absorb light of a corresponding wavelength, thereby reflecting or transmitting light of the corresponding color to achieve color display on the display substrate. For example, Figure 4cIn the case that the sub-pixel reflects or transmits red light, the second overlapping area S21 can be configured to absorb green light, the second overlapping area S22 can be configured to absorb blue light, and the second overlapping area S23 can be configured to absorb green light. In the case that the display substrate displays red light (reflective display or transmissive display) to the second electrode 13, a voltage for absorbing green light is provided to the first electrode 11 corresponding to the second overlapping area S21, then the second overlapping area S21 reflects or transmits blue light and red light. A voltage for absorbing blue light is provided to the first electrode 11 corresponding to the second overlapping area S22, then the second overlapping area S22 reflects or transmits green light and red light. A voltage for absorbing green light is provided to the first electrode 11 corresponding to the second overlapping area S23, then the second overlapping area S23 reflects or transmits blue light and red light. The energy of the reflected or transmitted red light is greater than that of green light and blue light, so that the sub-pixel Pi displays red in visual effect. Figure 4c In the pixel unit, the number of sub-pixels is large, so that the energy of the reflected or transmitted corresponding color is greater than that of the absorbed color, and the displayed color is more obvious. Taking red as an example, each sub-pixel includes four overlapping areas S2, and the difference between the energy of the finally transmitted or reflected red light and the energy of the reflected or transmitted green light and blue light is greater than the energy difference of each sub-pixel including two overlapping areas S2, so that the displayed red is more obvious.

[0096] In the example embodiment, as shown in Figures 3a-3b , Figures 4a-4b The display substrate includes a plurality of pixel units P, and each pixel unit P includes a plurality of sub-pixels Pi. In the same pixel unit P, the arrangement direction of the plurality of sub-pixels is different from the arrangement direction of at least two adjacent second overlapping areas S2 in each sub-pixel. As shown in Figure 3a and Figure 4a The three sub-pixels P1-P3 in the same pixel unit P are arranged along the second direction Y, and the plurality of second overlapping areas S2 in each sub-pixel are arranged along the first direction X. As shown in Figure 3b and Figure 4b The three sub-pixels P1-P3 in the same pixel unit P are arranged along the first direction X, and the plurality of second overlapping areas S2 in each sub-pixel are arranged along the second direction Y.

[0097] In the example embodiment of the present disclosure, as shown in Figures 3a-3b , Figures 4a-4b Each pixel unit P includes three sub-pixels Pi, where i is 1, 2, and 3, i.e., a first sub-pixel P1, a second sub-pixel P2, and a third sub-pixel P3. The number of sub-pixels in each pixel unit is not limited to three, for example, each pixel unit can include four sub-pixels.Figures 3a-3b In the structure shown in FIG. 4a, each pixel unit includes six adjacent second overlap regions S2; in the structure shown in FIG. 4b, each pixel unit includes nine adjacent second overlap regions S2.

[0098] In the exemplary embodiments of the present disclosure, as shown in Figure 5a and Figure 5b shown, Figure 5b is Figure 5a a cross-sectional structure diagram of A1-A1 position in FIG. 3, the substrate can further include a black matrix layer 15, which can be arranged between the second conductive layer and the nanoparticle layer, or the black matrix layer 15 can be arranged on the side of the nanoparticle layer away from the second conductive layer; the black matrix layer 15 can include a plurality of black matrix structures 151, and the plurality of black matrix structures 151 are arranged between two adjacent sub-pixels. By isolating the two adjacent sub-pixels through the black matrix structure 151, color mixing or color bleeding of adjacent sub-pixels can be avoided.

[0099] In the exemplary embodiments, as shown in Figures 6a to 6d , the first electrode 11 can be a strip structure extending in a direction forming a first included angle F1 with the first direction X, and the second electrode 13 can be a strip structure extending in a direction forming a second included angle F2 with the first direction X, and the first included angle F1 and the second included angle F2 can be in the range of 0° to 180°.

[0100] In the exemplary embodiments, as shown in Figure 1 and Figure 6a shown, Figure 6a is Figure 1 a schematic diagram of the arrangement of the first electrode 11 and the second electrode 13 in FIG. 3, in the plane of the display substrate, the first electrode 11 can extend along the second direction Y, and the second electrode 13 can extend along the first direction X, and the first direction X is perpendicular to the second direction Y. In Figure 6a the structure shown in FIG. 4a, the first included angle F1 is 0 degrees, and the second included angle F2 is 90 degrees.

[0101] In the exemplary embodiments, as shown in Figures 6b to 6d , the first electrode 11 extends in a direction forming a first included angle F1 with the first direction X, and the second electrode 13 extends in a direction forming a second included angle F2 with the first direction X. As shown in Figure 6b , the first included angle F1 can be an obtuse angle, and the second included angle F2 can be an acute angle; as shown in Figure 6c , the first included angle F1 and the second included angle F2 can both be acute angles; as shown in Figure 6d , the first included angle F1 can be an acute angle, and the second included angle F2 can be an obtuse angle, wherein the range of the acute angle can be greater than 0 degrees and less than 90 degrees, and the range of the obtuse angle can be greater than 90 degrees and less than 180 degrees.

[0102] InFigure 6a In the structure shown, the angle between the orthographic projection of the first electrode 11 onto the substrate 10 and the orthographic projection of the second electrode 13 onto the substrate 10 can be a right angle; in 6b to Figure 6d In the structure shown, the angle between the orthographic projection of the first electrode 11 on the substrate and the orthographic projection of the second electrode 13 on the substrate can be a non-right angle.

[0103] In an exemplary implementation, such as Figure 6e and Figure 6f As shown, both the first electrode 11 and the second electrode 13 can be arc-shaped, with the curvature of the first electrode 11 opposite to that of the second electrode 13. Multiple sub-pixels Pi can be arranged along the arc shape. For example, in... Figure 6e In this configuration, the arc of the first electrode 11 can be bent in the opposite direction to the second direction Y, and the center of curvature of any arc of the first electrode 11 is located on one side of the first electrode 11 in the second direction Y; the arc of the second electrode 13 can be bent in the direction to the second direction Y, and the center of curvature of any arc of the second electrode 13 is located on the side of the second electrode 13 opposite to the second direction Y. Figure 6f In the first electrode 11, the arc-shaped bending direction can be towards the first direction X, and the curvature center of any arc of the first electrode 11 is located on the side of the first electrode 11 opposite to the first direction X; the arc-shaped bending direction of the second electrode 13 can be towards the opposite direction of the first direction X, and the curvature center of any arc of the second electrode 13 is located on the side of the second electrode 13 in the first direction X.

[0104] In an exemplary embodiment, the first electrode 11 can be formed on the substrate 10 by electron beam evaporation.

[0105] In an exemplary embodiment, both the first electrode 11 and the second electrode 13 can be light-transmitting structures. In this structure, since the first electrode 11 is a light-transmitting structure, a portion of the light incident from the second electrode 13 is absorbed by the nanoparticles and the deformation layer, while the light not absorbed by the nanoparticles and the deformation layer 12 can be emitted through the first electrode 11 and the substrate 10.

[0106] In an exemplary embodiment, the first electrode 11 can be a reflective structure, and the second electrode 13 can be a light-transmitting structure. In this structure, since the first electrode 11 is a reflective structure, a portion of the light incident from the second electrode 13 is absorbed by the nanoparticles and the deformation layer, while the light not absorbed by the nanoparticles and the deformation layer is reflected by the first electrode 11 and emitted through the second conductive layer.

[0107] In an exemplary implementation, such as Figure 7As shown, the display substrate can further include a reflective layer 16 disposed on the side of the base 10 distal to the first conductive layer.

[0108] In an exemplary embodiment, as shown in FIG. 1, the display substrate can further include a reflective layer 16 disposed between the base 10 and the first conductive layer. Figure 8 As shown, the display substrate can further include a reflective layer 16 disposed between the base 10 and the first conductive layer.

[0109] In an exemplary embodiment, the reflective layer 16 can be made of metal, for example, the reflective layer 16 can be made of aluminum. In an exemplary embodiment, as shown in FIG. 1, the reflective layer 16 and the first conductive layer are disposed with an insulating layer 17 therebetween, which can avoid the first electrode 11 on the first conductive layer from short-circuiting with the reflective layer 16 after being powered. Figure 8

[0110] In the structure as shown in FIG. 1, the second electrode 13 is a light-transmitting structure, and the first electrode 11 can be a light-transmitting structure or a light-reflecting structure. Since the reflective layer 16 is provided, the light incident by the second electrode 13 will be ultimately reflected by the reflective layer 16 and then emitted through the second electrode 13, so that the color of the reflected light is displayed on the side of the display substrate where the second electrode 13 is located. Figure 7 Figure 8 In the structure as shown in FIG. 1, the second electrode 13 is a light-transmitting structure, and the first electrode 11 can be a light-transmitting structure or a light-reflecting structure. Since the reflective layer 16 is provided, the light incident by the second electrode 13 will be ultimately reflected by the reflective layer 16 and then emitted through the second electrode 13, so that the color of the reflected light is displayed on the side of the display substrate where the second electrode 13 is located.

[0111] In an exemplary embodiment, the nanoparticles can be metal nanoparticles, for example, the nanoparticles can be silver (Ag) nanoparticles.

[0112] In an exemplary embodiment, as shown in FIG. 1, the thickness H of the nanoparticles 141 can be 30 nanometers to 80 nanometers, and the width W of the nanoparticles 141 can be 45 nanometers to 65 nanometers. Figure 9f In an exemplary embodiment, as shown in FIG. 1, the nanoparticles 141 are periodically arranged, and the distance L0 between the center positions of two adjacent nanoparticles 141 is 200 nanometers to 400 nanometers.

[0113] Figure 7 In an exemplary embodiment, as shown in FIG. 1, the distance M between the side of the nanoparticles 141 facing the second conductive layer and the side of the first conductive layer facing the deformation layer 12 is 2 nanometers to 20 nanometers.

[0114] In an exemplary embodiment, as shown in FIG. 1, the distance M between the side of the nanoparticles 141 facing the second conductive layer and the side of the first conductive layer facing the deformation layer 12 is 2 nanometers to 20 nanometers. Figure 9f

[0115] ​​​​In an exemplary embodiment, the deformation layer 12 is an electroactivated polymer that deforms when a voltage is applied. The deformation layer 12 can be a dielectric elastomer, which can be polyacrylate or silicone rubber. The dielectric elastomer layer can be deposited on the substrate 10 on which the first conductive layer is formed by a layer-to-layer nano-self-assembly process.

[0116] Since the three primary colors of light include red, green, and blue, and different colors of light have different wavelengths, this embodiment utilizes the light absorption properties of nanoparticles and dielectric elastomers, as well as the different wavelengths of light absorbed by the deformation layer (which can be a dielectric elastomer) after a voltage is applied, to achieve the reflection or transmission of light of the corresponding color. The following section uses simulation model results to illustrate the factors influencing the reflection or transmission of light by nanoparticles and dielectric elastomers:

[0117] (1) The effect of the thickness H of nanoparticles on reflected or transmitted light.

[0118] The thickness H of the nanoparticles Figure 2 and Figure 9f The size of the medium-sized nanoparticles 141 along the third direction Z varies in the range of 30 nm to 80 nm. The simulated trends of reflectivity or transmittance are as follows: Figure 9a As shown, the light absorption spectrum can be indirectly obtained through reflection or transmission. The height of nanoparticle 141 varies in the range of 50 nanometers to 80 nanometers, and the absorption wavelength only varies at a few discrete positions. It can be understood that the thickness of nanoparticles in the range of 50 nanometers to 80 nanometers has little effect on the reflectivity / transmittance of light.

[0119] For example, when the thickness H of nanoparticles is about 48 nanometers, the reflection or transmittance of light with a wavelength of about 700 nanometers is relatively low (in the range of 0-0.3), and the corresponding absorption rate is relatively high; in the range of nanoparticle thickness of 30 to 80 nanometers, the absorption wavelength is about 630 nanometers (the reflection or transmittance is relatively low, about 0-0.3, and the absorption rate is relatively high).

[0120] (2) The effect of the width W of nanoparticles on reflected or transmitted light.

[0121] The width W of the nanoparticles varies from 45 nm to 65 nm, and the simulated reflectance / transmittance variation trend is as follows: Figure 9bAs shown, the change of the width W of the nanoparticle 141 affects the absorption wavelength. In the range of 45 nm to 65 nm of the width of the nanoparticle, the absorption wavelength is larger as the width of the nanoparticle increases. For example, when the width of the nanoparticle is about 60 nm, the absorption wavelength is about 700 nm, and when the width W of the nanoparticle is about 45 nm, the absorption wavelength is about 700 nm.

[0122] In the example embodiment, as shown in FIG. 1, the width W of the nanoparticle is the size of the nanoparticle 141 along the first direction X. Figure 9f As shown, the width W of the nanoparticle is the size of the nanoparticle 141 along the first direction X.

[0123] (3) Effect of nanoparticle period on reflected or transmitted light.

[0124] As shown in FIG. 4, the period of the nanoparticle is changed in the range of 200 nm to 400 nm, and the change trend of the reflectivity or transmissivity obtained by simulation calculation is that the absorption wavelength of the nanoparticle basically remains unchanged, and the absorption wavelength is about 470 nm to 530 nm. Figure 9c In the example embodiment, as shown in FIG. 1, the period of the nanoparticle can be the distance R between the centers of two adjacent nanoparticles.

[0125] Figure 9f (4) Effect of light incidence angle J on reflected or transmitted light.

[0126] As shown in FIG. 6, the light incidence angle J is in the range of 0° (i.e., the light incidence angle is perpendicular to the surface of the nanoparticle) to 60°, and the absorption wavelength of the nanoparticle basically remains unchanged, as shown in FIG. 7, the absorption wavelength of the nanoparticle is about 620 nm to 650 nm.

[0127] (5) Effect of the distance M between the nanoparticle and the second electrode 13 on reflected or transmitted light. Figure 9d Figure 9c As shown in FIG. 8, the abscissa M is the distance between the nanoparticle 141 and the second electrode 13, and M is in the range of 4 nm to 20 nm, which can achieve the absorption of light with a wavelength of 400 nm to 650 nm. By applying different voltages to the first electrode 11 and the second electrode 13, the thickness of the dielectric elastomer can be adjusted, so that the absorption of light with different wavelength ranges can be controlled, so as to realize the color display of the display substrate. As shown in FIG. 9, the value of M is basically linearly related to the value of the absorption wavelength, and in the range of 4 nm to 20 nm of M, the wavelength of the absorbed light gradually decreases as the value of M increases.

[0128] (5) Effect of the distance M between the nanoparticle and the second electrode 13 on reflected or transmitted light.

[0129] As shown in FIG. 8, the abscissa M is the distance between the nanoparticle 141 and the second electrode 13, and M is in the range of 4 nm to 20 nm, which can achieve the absorption of light with a wavelength of 400 nm to 650 nm. By applying different voltages to the first electrode 11 and the second electrode 13, the thickness of the dielectric elastomer can be adjusted, so that the absorption of light with different wavelength ranges can be controlled, so as to realize the color display of the display substrate. As shown in FIG. 9, the value of M is basically linearly related to the value of the absorption wavelength, and in the range of 4 nm to 20 nm of M, the wavelength of the absorbed light gradually decreases as the value of M increases. Figure 9e Figure 9f As shown in FIG. 8, the abscissa M is the distance between the nanoparticle 141 and the second electrode 13, and M is in the range of 4 nm to 20 nm, which can achieve the absorption of light with a wavelength of 400 nm to 650 nm. By applying different voltages to the first electrode 11 and the second electrode 13, the thickness of the dielectric elastomer can be adjusted, so that the absorption of light with different wavelength ranges can be controlled, so as to realize the color display of the display substrate. As shown in FIG. 9, the value of M is basically linearly related to the value of the absorption wavelength, and in the range of 4 nm to 20 nm of M, the wavelength of the absorbed light gradually decreases as the value of M increases. Figure 9e As shown in FIG. 8, the abscissa M is the distance between the nanoparticle 141 and the second electrode 13, and M is in the range of 4 nm to 20 nm, which can achieve the absorption of light with a wavelength of 400 nm to 650 nm. By applying different voltages to the first electrode 11 and the second electrode 13, the thickness of the dielectric elastomer can be adjusted, so that the absorption of light with different wavelength ranges can be controlled, so as to realize the color display of the display substrate. As shown in FIG. 9, the value of M is basically linearly related to the value of the absorption wavelength, and in the range of 4 nm to 20 nm of M, the wavelength of the absorbed light gradually decreases as the value of M increases.​​​

[0130] In this embodiment, the value of M can be determined based on the wavelength range of the three primary colors of light: red, green, and blue. The wavelength of red light is approximately 650 nanometers. Figure 9e The value of M in the middle ranges from approximately 4 nanometers to 5.2 nanometers; the wavelength range of green light is approximately 532 nanometers, corresponding to... Figure 9e The value of M in the middle is approximately 8 to 10 nanometers; the wavelength range of blue light is approximately 445 to 450 nanometers, corresponding to... Figure 9e The value of M is approximately 18 to 20 nanometers; and based on this, different voltages are applied to the first electrode 11 and the second electrode 13 corresponding to the second overlapping region S2 in the corresponding sub-pixel. For example, depending on the sub-pixel display situation, the voltage required when the second overlapping region S2 absorbs red light is the first voltage U1, the voltage required when the second overlapping region S2 absorbs green light is the second voltage U2, and the voltage required when the second overlapping region S2 absorbs blue light is the third voltage U3. Since the values ​​of M corresponding to red, green, and blue increase sequentially, the deformation of the corresponding dielectric elastomer also increases, and the required voltage also increases accordingly. Therefore, the voltage values ​​of the first voltage U1, the second voltage U2, and the third voltage U3 increase sequentially.

[0131] exist Figures 9a to 9e In the diagram, the shade of color in c represents reflectance or transmittance. In this embodiment, reflectance and transmittance are inversely proportional to absorptivity. For example, in... Figures 9a to 9e In a transmissive display, a higher reflectivity / transmittance ratio indicates a lower absorption rate, and vice versa. In this embodiment, the display substrate can be either a transmissive or reflective display. In a reflective display, the total energy of the light received by the nanoparticles and dielectric elastomer has two main destinations: absorption by the nanoparticles and dielectric elastomer, and reflection by at least one of the first electrode 11 and the reflective layer 16. Reflectivity can be understood as the ratio of the energy of the reflected light to the total energy of the received light. In a transmissive display, the total energy of the light received by the nanoparticles and dielectric elastomer also has two main destinations: absorption by the nanoparticles and dielectric elastomer, and emission through the first electrode 11. Transmittance can be understood as the ratio of the energy of the transmitted light to the total energy of the received light. The values ​​of reflectivity and transmittance range from 0 to 1.

[0132] In this embodiment of the disclosure, the substrate 10 may be made of a transparent material, such as transparent glass.

[0133] The preparation process of the display substrate is exemplarily illustrated below. The "patterning process" in the present disclosure includes coating photoresist, mask exposure, development, etching, stripping photoresist and the like for metal material, inorganic material or light-transmissive conductive material, and includes coating organic material, mask exposure and development and the like for organic material. The deposition can adopt any one or more of sputtering, evaporation, chemical vapor deposition, the coating can adopt any one or more of spraying, spin coating and inkjet printing, and the etching can adopt any one or more of dry etching and wet etching, which are not limited in the present disclosure. The "thin film" refers to a thin film of a certain material on a substrate prepared by deposition, coating or other processes. If the "thin film" does not need to be patterned during the entire preparation process, the "thin film" can also be referred to as a "layer". If the "thin film" needs to be patterned during the entire preparation process, it is referred to as a "thin film" before the patterning process and a "layer" after the patterning process. The "layer" after the patterning process contains at least one "pattern". The "A and B are arranged in the same layer" in the present disclosure means that A and B are formed at the same time by the same patterning process. The "thickness" of the film layer is the size of the film layer in the direction perpendicular to the display substrate. In the exemplary embodiments of the present disclosure, "the orthographic projection of B is within the orthographic projection of A" or "the orthographic projection of A contains the orthographic projection of B" means that the boundary of the orthographic projection of B falls within the boundary of the orthographic projection of A, or the boundary of the orthographic projection of A overlaps with the boundary of the orthographic projection of B.

[0134] In an exemplary embodiment, the preparation process of the display substrate can include the following operations:

[0135] (11) forming a first conductive layer pattern.

[0136] In the exemplary embodiment, forming the first conductive layer pattern can include forming a first conductive thin film on the substrate 10, patterning the first conductive thin film by a patterning process to form the first conductive layer pattern arranged on the substrate 10, and the first conductive layer pattern can include a plurality of first electrodes 11 arranged along a first direction X and extending along a second direction Y, as shown in Figure 10 and Figure 11 Figure 11 Figure 10

[0137] In the exemplary embodiment, patterning the first conductive thin film by the patterning process can include coating a layer of photoresist on the first conductive thin film, exposing and developing the photoresist using a mask plate to form an unexposed area at the position of the first electrode 11, retaining the photoresist, and forming a completely exposed area without photoresist at the remaining positions; removing the first conductive thin film of the completely exposed area by an etching process, and stripping off the remaining photoresist to form the first electrode 11. ​​​

[0138] (12) forming an electrodielectric elastomer layer.

[0139] In an exemplary embodiment, forming the electrodielectric elastomer layer can include depositing an electrodielectric elastomer material on the substrate 10 with the aforementioned pattern to form the electrodielectric elastomer layer, as shown in FIG. 2. Figure 12 As shown, 12 is the electrodielectric elastomer layer. In an exemplary embodiment, the electrodielectric elastomer layer 12 can be formed by depositing the electrodielectric elastomer material on the substrate 10 with the first conductive layer pattern through a nano self-assembly process between layers.

[0140] In an exemplary embodiment, the nano self-assembly process refers to that the electrodielectric elastomer material is spontaneously organized on the substrate with the first conductive layer pattern to form the electrodielectric elastomer layer without human intervention.

[0141] (13) forming a second conductive layer pattern.

[0142] In an exemplary embodiment, forming the second conductive layer pattern can include depositing a second conductive film on the substrate 10 with the aforementioned pattern, and patterning the second conductive film through a patterning process to form the second conductive layer pattern arranged on the electrodielectric elastomer layer, which can include a plurality of second electrodes 13 arranged along the second direction Y and extending along the first direction X, as shown in FIG. 3. Figure 13 and Figure 14 As shown, Figure 14 is Figure 13 a cross-sectional structure diagram of L2-L2 position in FIG. 4.

[0143] In an exemplary embodiment, patterning the second conductive film through the patterning process can include coating a layer of photoresist on the second conductive film, exposing and developing the photoresist using a mask plate to form an unexposed area at the position of the second electrode 13, retaining the photoresist, and forming a completely exposed area without photoresist at the remaining positions; removing the second conductive film at the completely exposed area through an etching process, and stripping off the remaining photoresist to form the second electrode 13.

[0144] In an exemplary embodiment, the first conductive film can be deposited on the substrate 10 through an electron beam evaporation method, and the first conductive film can be an indium tin oxide semiconductor light-transmitting conductive film, for example, indium tin oxide (English full name: Indium Tin Oxides, abbreviated as ITO).

[0145] (14) forming a nanoparticle layer.

[0146] In the exemplary embodiment, forming the nanoparticle layer can include: forming the nanoparticle layer 14 on the substrate 10 by dot spin coating after forming the aforementioned pattern. In the exemplary embodiment, the nanoparticle 141 can be a metal nanoparticle, such as a silver (Ag) nanoparticle. As shown in FIG. 1B, the nanoparticle layer 14 is formed on the substrate 10. Figure 14 and Figure 15 As shown in FIG. 1C, the nanoparticle layer 14 is formed on the substrate 10. Figure 15 As shown in FIG. 1D, the nanoparticle layer 14 is formed on the substrate 10. Figure 14 As shown in FIG. 1E, the nanoparticle layer 14 is formed on the substrate 10.

[0147] In the exemplary embodiment, forming the nanoparticle layer can further include drying the nanoparticle layer in a nitrogen environment, etc.

[0148] In the exemplary embodiment, the first conductive film can be a light-transmissive conductive film, such as an indium tin oxide semiconductor light-transmissive conductive film, and the indium tin oxide can be indium tin oxides (ITO). In another exemplary embodiment, the first conductive film can be a reflective conductive film, such as a metal conductive film, and the metal can be one of gold, silver, and aluminum.

[0149] In the exemplary embodiment, the first conductive film and the second conductive film are both light-transmissive conductive films, and the first electrode and the second electrode are both light-transmissive structures, so that a transmissive display substrate can be prepared.

[0150] In the exemplary embodiment, the second conductive film is a light-transmissive conductive film, and the first conductive film is a reflective conductive film, so that a reflective display substrate can be prepared.

[0151] In the exemplary embodiment, before the step (11), a reflective layer can be formed on the side of the substrate 10 away from the first conductive layer, and the reflective layer can be a metal, such as aluminum. Alternatively, before the step (11), a reflective layer and an insulating layer can be formed between the substrate 10 and the first conductive layer, and the reflective layer can be a metal, such as aluminum. In the embodiment of the present disclosure, the reflective layer is prepared on the substrate 10, and then the reflective display substrate is formed.

[0152] In the embodiment of the present disclosure, the transmissive display substrate is configured such that, when light is incident on the side of the display substrate away from the light, the display picture is formed by the light being absorbed by the dielectric elastomer layer and then being emitted from the other side of the display substrate. The reflective display substrate is configured such that, when light is incident on the side of the display substrate toward the light, the display picture is formed by the light being absorbed by the dielectric elastomer layer and then being reflected by the reflective layer or the first electrode and being emitted from the side of the display substrate toward the light.

[0153] In the exemplary embodiments, before or after the step (14), a step of forming a black matrix layer 15 on the substrate 10 on which the second conductive layer pattern is formed can be further included, the black matrix layer including a plurality of black matrix structures 151, as shown in FIGS. 1C and 1D. Figure 5a and Figure 5b as shown in FIGS. 1C and 1D.

[0154] In the embodiments of the present disclosure, the total thickness of the first conductive layer, the deformation layer, the second conductive layer and the nanoparticle layer in the display substrate (i.e., the sum of the sizes of the first conductive layer, the deformation layer, the second conductive layer and the nanoparticle layer along the third direction Z in the display substrate Figure 16 does not exceed 200 nanometers, which can make the display substrate thin enough.

[0155] The embodiments of the present disclosure also provide a display device, which can include the display substrate according to any of the above embodiments.

[0156] In the embodiments of the present disclosure, the display device can be a product or component with a display function, such as a mobile phone, a computer, a TV, a medical monitoring device, a vehicle central control device, a display, a notebook computer, a digital photo frame, a navigation device, etc.

[0157] The embodiments of the present disclosure also provide a driving method of a display substrate, which can drive the display substrate according to any of the above embodiments. The driving method can include: applying different voltages to the plurality of first electrodes and the plurality of second electrodes to make the deformation layer located between the first electrodes and the second electrodes deform to different degrees.

[0158] The embodiments of the present disclosure also provide a preparation method of a display substrate, which can include:

[0159] forming a first conductive layer on one side of the substrate, the first conductive layer including a plurality of first electrodes arranged in parallel;

[0160] forming a deformation layer on a side of the first conductive layer away from the substrate;

[0161] forming a second conductive layer on a side of the deformation layer away from the first conductive layer, the second conductive layer including a plurality of second electrodes arranged in parallel;

[0162] forming a nanoparticle layer on a side of the second conductive layer away from the deformation layer, the nanoparticle layer including a plurality of nanoparticles;

[0163] The display substrate includes a plurality of sub-pixels defined by the intersections of the first electrodes and the second electrodes; the orthographic projections of the plurality of first electrodes and the plurality of second electrodes on the substrate include a plurality of first overlapping areas, and the orthographic projection of any one of the first overlapping areas and the orthographic projection of at least one of the nanoparticles on the substrate include a second overlapping area; and the orthographic projection of each sub-pixel on the substrate at least partially overlaps with at least two adjacent second overlapping areas.

[0164] In an example embodiment, the first electrode is formed on the substrate using an electron beam evaporation process.

[0165] In an example embodiment, the deformation layer is formed on a side of the first conductive layer away from the substrate using a nano self-assembly process.

[0166] In an example embodiment, the nanoparticle layer is formed on a side of the second conductive layer away from the deformation layer using a point spin coating process.

[0167] The display substrate and the driving method, the preparation method, and the display device provided by the embodiments of the present disclosure include a first conductive layer, a deformation layer, a second conductive layer, and a nanoparticle layer stacked on a substrate, the first conductive layer includes a plurality of first electrodes, the second conductive layer includes a plurality of second electrodes, the orthographic projections of the plurality of first electrodes and the plurality of second electrodes on the substrate exist a plurality of first overlapping areas, the orthographic projection of any one first overlapping area and at least one nanoparticle on the substrate exists a second overlapping area, and the orthographic projection of each sub-pixel on the substrate and the adjacent at least two second overlapping areas at least partially overlap. The display substrate provided by the embodiments of the present disclosure is simple to prepare and relatively thin, and overcomes the problems of the prior display panel, such as complex preparation process and low degree of thinness.

[0168] The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can be referred to the general design.

[0169] In the case of no conflict, the features in the embodiments of the present disclosure can be combined with each other to obtain new embodiments.

[0170] Although the embodiments disclosed by the embodiments of the present disclosure are as above, the content is only the embodiments adopted for the purpose of facilitating the understanding of the embodiments of the present disclosure, and is not used to limit the embodiments of the present disclosure. Any person skilled in the art of the present disclosure can make any modification and change in the implementation form and details without departing from the spirit and scope of the embodiments of the present disclosure, but the patent protection scope of the embodiments of the present disclosure shall be subject to the scope defined by the attached claims.

Claims

1. A display substrate, comprising a substrate, and a first conductive layer, a deformation layer, a second conductive layer, and a nanoparticle layer stacked on the substrate; The first conductive layer includes a plurality of first electrodes, the second conductive layer includes a plurality of second electrodes, the nanoparticle layer includes a plurality of nanoparticles, and the display substrate includes a plurality of sub-pixels defined by the intersection of the plurality of first electrodes and the plurality of second electrodes; The orthogonal projections of the plurality of first electrodes and the plurality of second electrodes on the substrate have a plurality of first overlapping regions, and any one of the first overlapping regions has a second overlapping region with the orthogonal projection of at least one of the nanoparticles on the substrate. The orthographic projection of each sub-pixel onto the substrate at least partially overlaps with at least two adjacent second overlapping regions.

2. The display substrate according to claim 1, wherein, The orthographic projection of each sub-pixel onto the substrate at least partially overlaps with the two adjacent second overlapping regions; Alternatively, the orthographic projection of each sub-pixel onto the substrate at least partially overlaps with the three adjacent second overlapping regions.

3. The display substrate according to claim 1 or 2, wherein, The display substrate includes multiple pixel units, and each pixel unit includes multiple sub-pixels. In the same pixel unit, the arrangement direction of the multiple sub-pixels is different from the arrangement direction of at least two adjacent second overlapping regions in each sub-pixel.

4. The display substrate according to claim 1 or 2 further includes a black matrix layer, wherein the black matrix layer is disposed between the second conductive layer and the nanoparticle layer, or the black matrix layer is disposed on the side of the nanoparticle layer away from the second conductive layer; The black matrix layer includes multiple black matrix structures, which are disposed between two adjacent sub-pixels.

5. The display substrate according to any one of claims 1 to 4, wherein, Within the plane of the display substrate, the first electrode is a strip structure extending at a first angle to the first direction, and the second electrode is a strip structure extending at a second angle to the first direction. The values ​​of the first angle and the second angle range from 0° to 180°.

6. The display substrate according to any one of claims 1 to 4, wherein, Both the first electrode and the second electrode are arc-shaped, and the bending direction of the arc of the first electrode is opposite to the bending direction of the arc of the second electrode. The plurality of sub-pixels are arranged along the arc.

7. The display substrate according to any one of claims 1 to 6, wherein, Both the first electrode and the second electrode are light-transmitting structures.

8. The display substrate according to any one of claims 1 to 6, wherein, The first electrode is a reflective structure, and the second electrode is a light-transmitting structure.

9. The display substrate according to any one of claims 1 to 8 further includes a reflective layer disposed on the side of the substrate away from the first conductive layer.

10. The display substrate according to any one of claims 1 to 8, further comprising a reflective layer and an insulating layer, the reflective layer being disposed between the substrate and the insulating layer, and the insulating layer being disposed between the reflective layer and the first conductive layer.

11. The display substrate according to any one of claims 1 to 8, wherein, The nanoparticles are silver nanoparticles.

12. The display substrate according to any one of claims 1 to 8, wherein, The deformation layer is made of polyacrylate or silicone rubber.

13. The display substrate according to any one of claims 1 to 8, wherein, The nanoparticles are arranged periodically, with the distance between the centers of two adjacent nanoparticles ranging from 200 nanometers to 400 nanometers.

14. The display substrate according to any one of claims 1 to 8, wherein, The distance between the side of the nanoparticle facing the second conductive layer and the side of the first conductive layer facing the deformation layer is 2 nanometers to 20 nanometers.

15. A display device comprising a display substrate as described in any one of claims 1 to 14.

16. A method for driving a display substrate, comprising driving the display substrate as described in any one of claims 1 to 14, comprising: Applying different voltages to multiple first electrodes and multiple second electrodes causes the deformation layer located between the first electrodes and the second electrodes to deform to different degrees.

17. A method for preparing a display substrate, comprising: A first conductive layer is formed on one side of the substrate, the first conductive layer comprising a plurality of first electrodes arranged in parallel. A deformation layer is formed on the side of the first conductive layer away from the substrate; A second conductive layer is formed on the side of the deformed layer away from the first conductive layer, and the second conductive layer includes a plurality of parallel-arranged second electrodes. A nanoparticle layer is formed on the side of the second conductive layer away from the deformation layer, and the nanoparticle layer includes a plurality of nanoparticles. The display substrate includes a plurality of sub-pixels defined by the intersection of the first electrode and the second electrode; the orthographic projections of the plurality of first electrodes and the plurality of second electrodes on the substrate have a plurality of first overlapping regions, and any one of the first overlapping regions has a second overlapping region with the orthographic projection of at least one of the nanoparticles on the substrate; The orthographic projection of each sub-pixel onto the substrate at least partially overlaps with at least two adjacent second overlapping regions.

18. The method for preparing a display substrate according to claim 17, wherein, The first electrode is formed on the substrate using an electron beam evaporation process.

19. The method for preparing a display substrate according to claim 17, wherein, The deformation layer is formed on the side of the first conductive layer away from the substrate using a nano-self-assembly process.

20. The method for preparing a display substrate according to claim 17, wherein, The nanoparticle layer is formed on the side of the second conductive layer away from the deformable layer using a spin coating process.

Images