Electronic paper and its manufacturing method

Abstract

This invention discloses an electronic paper and its manufacturing method. The electronic paper includes: a first substrate including a common electrode layer; a second substrate including a first electrode layer; a first electrophoretic layer disposed between the first and second substrates; a first microcup structure layer of the first electrophoretic layer including a plurality of first sub-pixel grooves, each sub-pixel groove containing an electrophoretic solution; a third substrate including a second electrode layer; a second electrophoretic layer disposed between the first and third substrates; a second microcup structure layer of the second electrophoretic layer including a plurality of second sub-pixel grooves, each sub-pixel groove containing an electrophoretic solution; the projection of a first sub-pixel groove onto the second electrophoretic layer overlaps with one of the second sub-pixel grooves, and the light-emitting color of the electrophoretic solution in the first sub-pixel groove is different from the light-emitting color of the electrophoretic solution in the overlapping second sub-pixel groove. This invention can achieve double-sided display, or high-resolution or high-quality single-sided display, meeting users' requirements for electronic paper performance.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to an electronic paper and its manufacturing method. Background Technology

[0002] Electronic paper is very similar to ordinary paper, with features such as high contrast, wide viewing angle, low power consumption, and high reading comfort, and has gradually become a widely used display device.

[0003] Electronic paper technology is an electrophoretic display technology. Its main principle is the migration of charged nanoparticles suspended in a liquid under the influence of an electric field. With the development of display technology, people have higher and higher requirements for the performance of electronic paper. At present, electronic paper technology still has limitations in color display and resolution, which need to be further resolved. In addition, further requirements are also put forward for the diversity of display. Summary of the Invention

[0004] This invention provides an electronic paper and its manufacturing method. The electronic paper of this invention can achieve double-sided display or high-resolution or high-quality single-sided display, meeting users' requirements for electronic paper performance.

[0005] According to one aspect of the present invention, an electronic paper is provided, comprising:

[0006] A first substrate, wherein the first substrate includes a common electrode layer;

[0007] A second substrate, the second substrate including a first electrode layer;

[0008] A first electrophoretic layer is disposed between a first substrate and a second substrate; the first electrophoretic layer includes a first microcup structure layer, the first microcup structure layer includes a plurality of first sub-pixel grooves, and each first sub-pixel groove is provided with electrophoretic liquid; the first electrode layer includes a plurality of first electrode blocks, each first electrode block corresponding to a first sub-pixel groove.

[0009] A third substrate, the third substrate including a second electrode layer;

[0010] The second electrophoretic layer is disposed between the surface of the first substrate away from the first electrophoretic layer and the third substrate; wherein, the second electrophoretic layer includes a second microcup structure layer, the second microcup structure layer includes a plurality of second sub-pixel grooves, and each second sub-pixel groove is provided with electrophoretic liquid; the second electrode layer includes a plurality of second electrode blocks, each second electrode block corresponding to one second sub-pixel groove;

[0011] The vertical projection of each first sub-pixel groove onto the second electrophoretic layer overlaps with a second sub-pixel groove. The light emitted by the electrophoretic liquid in the first sub-pixel groove is different from the light emitted by the electrophoretic liquid in the overlapping second sub-pixel groove.

[0012] Optionally, the first microcup structure layer includes a plurality of first sub-pixel recess groups, and the second microcup structure layer includes a plurality of second sub-pixel recess groups; wherein:

[0013] Each first sub-pixel groove group includes a first groove and a second groove; a first electrophoretic solution is disposed in the first groove, and a second electrophoretic solution is disposed in the second groove; each second sub-pixel groove group includes a third groove and a fourth groove, the third groove being disposed in the second electrophoretic solution, and the fourth groove being disposed in the first electrophoretic solution; the vertical projections of the first groove and the third groove on the first substrate overlap, and the vertical projections of the second groove and the fourth groove on the first substrate overlap; the first electrophoretic solution is used to emit a first color light, and the second electrophoretic solution is used to emit a second color light and a third color light;

[0014] Alternatively, each of the first sub-pixel groove groups includes a fifth groove, a sixth groove, and a seventh groove; the fifth groove contains a third electrophoretic liquid, the sixth groove contains a fourth electrophoretic liquid, and the seventh groove contains a fifth electrophoretic liquid; each of the second sub-pixel groove groups includes an eighth groove, a ninth groove, and a tenth groove, the eighth groove contains a third electrophoretic liquid, the ninth groove contains a fourth electrophoretic liquid, and the tenth groove contains a fifth electrophoretic liquid; the third electrophoretic liquid is used to emit a first color light, the fourth electrophoretic liquid is used to emit a second color light, and the fifth electrophoretic liquid is used to emit a third color light.

[0015] Optionally, the first electrophoretic solution includes black charged particles and red charged particles, or the first electrophoretic solution includes black charged particles, yellow charged particles and magenta charged particles; the second electrophoretic solution includes black charged particles, green charged particles and blue charged particles, or the second electrophoretic solution includes black charged particles, cyan charged particles, yellow charged particles and magenta charged particles.

[0016] The third electrophoretic solution comprises black charged particles and red charged particles, or the third electrophoretic solution comprises black charged particles, yellow charged particles, and magenta charged particles; the fourth electrophoretic solution comprises black charged particles and green charged particles, or the fourth electrophoretic solution comprises black charged particles, cyan charged particles, and yellow charged particles; the fifth electrophoretic solution comprises black charged particles and blue charged particles, or the fifth electrophoretic solution comprises black charged particles, cyan charged particles, and magenta charged particles.

[0017] Optionally, the first electrophoretic solution further includes compensating charged particles, which are used to compensate for the emitted light brightness and / or emitted light color.

[0018] Optionally, when all the charged particles in the electrophoretic solution in the first sub-pixel groove are attached to the first electrode block, there are gaps between the charged particles.

[0019] And / or, when all the charged particles in the electrophoretic solution in the second sub-pixel groove are attached to the second electrode block, there are gaps between the charged particles.

[0020] Optionally, the first substrate further includes a first reflective layer, the first electrode layer and the second electrode layer are transparent electrode layers, the first reflective layer is used to reflect light back to the first electrophoretic layer, so that the light passes through the first electrophoretic layer and is emitted through the second substrate, and / or, the first reflective layer is used to reflect light back to the second electrophoretic layer, so that the light passes through the second electrophoretic layer and is emitted through the third substrate.

[0021] Alternatively, the second substrate may further include a second reflective layer, wherein the common electrode layer and the second electrode layer are transparent electrode layers, and the second reflective layer is used to reflect light back to the first electrophoresis layer and the second electrophoresis layer, so that the light passes through the first electrophoresis layer and the second electrophoresis layer and then exits through the third substrate.

[0022] Alternatively, the third substrate may further include a third reflective layer, wherein the common electrode layer and the first electrode layer are transparent electrode layers, and the third reflective layer is used to reflect light back to the first electrophoresis layer and the second electrophoresis layer, so that the light passes through the first electrophoresis layer and the second electrophoresis layer and then exits through the second substrate.

[0023] Optionally, when the first substrate includes a first reflective layer, the common electrode layer is a reflective electrode layer, and the common electrode is reused as the first reflective layer;

[0024] When the second substrate includes a second reflective layer, the first electrode layer is a reflective electrode layer, and the first electrode layer is reused as the second reflective layer;

[0025] When the third substrate includes a third reflective layer, the second electrode layer is a reflective electrode layer, and the second electrode layer is reused as the third reflective layer.

[0026] Optionally, the first substrate further includes a first protective layer and a second protective layer, wherein the first protective layer, the common electrode layer and the second protective layer are stacked sequentially;

[0027] The second substrate further includes a first driving plate and a first insulating layer, wherein the first driving plate, the first electrode layer and the first insulating layer are stacked in sequence; the first microcup structure layer is disposed on the surface of the first insulating layer, and the material used for the first microcup structure layer includes a polymer whose adhesion can be enhanced by light irradiation; the first microcup structure layer is bonded together with the first protective layer to seal the electrophoretic liquid in the first sub-pixel groove.

[0028] The third substrate further includes a second driving plate and a second insulating layer, wherein the second driving plate, the second electrode layer and the second insulating layer are stacked in sequence; the second microcup structure layer is disposed on the surface of the second insulating layer, and the material used for the second microcup structure layer includes a polymer whose adhesion can be enhanced by light irradiation; the second microcup structure layer is bonded together with the second protective layer to seal the electrophoretic liquid in the second sub-pixel groove.

[0029] Optionally, the first driving board includes a first driving circuit, and the vertical projection of the first sub-pixel groove on the first driving board does not overlap with the first driving circuit; or, the material used for the first driving circuit is a light-transmitting material.

[0030] The second driving board includes a second driving circuit, wherein the vertical projection of the second sub-pixel groove on the second driving board does not overlap with the second driving circuit, or the material used for the second driving circuit is a light-transmitting material.

[0031] Optionally, electronic paper also includes:

[0032] Sealing adhesive disposed between the second substrate and the third substrate;

[0033] The sealing adhesive is disposed around the first substrate, the first electrophoretic layer and the second electrophoretic layer;

[0034] The sealing adhesive contains conductive particles, a first signal transmission electrode is disposed on the surface of the second substrate, and a second signal transmission electrode is disposed on the surface of the third substrate. The first signal transmission electrode and the second signal transmission electrode are electrically connected through the sealing adhesive.

[0035] The first signal transmission electrode or the second signal transmission electrode is electrically connected to the common electrode layer through a conductive structure.

[0036] According to another aspect of the present invention, a method for manufacturing electronic paper is provided, comprising:

[0037] A second substrate is provided, the second substrate including a first electrode layer;

[0038] A first electrophoretic layer is disposed on the surface of the second substrate; the first electrophoretic layer includes a first microcup structure layer, the first microcup structure layer includes a plurality of first sub-pixel grooves, and each first sub-pixel groove is provided with electrophoretic liquid; the first electrode layer includes a plurality of first electrode blocks, each first electrode block corresponding to a first sub-pixel groove.

[0039] A third substrate is provided, the third substrate including a second electrode layer;

[0040] A second electrophoretic layer is disposed on the surface of the third substrate; wherein, the second electrophoretic layer includes a second microcup structure layer, the second microcup structure layer includes a plurality of second sub-pixel grooves, and each second sub-pixel groove is provided with electrophoretic liquid; the second electrode layer includes a plurality of second electrode blocks, each second electrode block corresponding to one second sub-pixel groove;

[0041] A first substrate is disposed on the surface of the first electrophoretic layer away from the second substrate, and the first substrate includes a common electrode layer.

[0042] The surface of the first substrate away from the first electrophoretic layer is bonded to the surface of the second electrophoretic layer away from the third substrate; wherein, the vertical projection of each first sub-pixel groove on the second electrophoretic layer overlaps with a second sub-pixel groove, and the light-emitting color of the electrophoretic liquid in the first sub-pixel groove is different from the light-emitting color of the electrophoretic liquid in the overlapping second sub-pixel groove.

[0043] In this embodiment of the invention, a common electrode layer, a first electrophoresis layer, and a first electrode layer constitute a first electronic paper structure, while a common electrode layer, a second electrophoresis layer, and a second electrode layer constitute a second electronic paper structure. The two electronic paper structures can be configured to emit light from a second substrate and a third substrate respectively, achieving double-sided display. Furthermore, by voltage control of the two electronic paper structures, both layers can emit light through either the second substrate or the third substrate. In this case, sub-pixels in the lower electronic paper structure can be configured to participate in the display as needed, achieving light emission compensation for the upper electronic paper structure and improving image display quality. Alternatively, all sub-pixels in the lower electronic paper structure can be configured to participate in the display. In this case, the vertical projection of the first sub-pixel groove onto the second electrophoresis layer can overlap with a portion of the second sub-pixel groove. By voltage control of the two sub-pixel layers, both layers can jointly display the same image, effectively increasing the number of sub-pixels per unit area and improving the resolution of the electronic paper. Therefore, the electronic paper in this embodiment of the invention can achieve double-sided display or single-sided display. In single-sided display, the lower electronic paper structure can be set to compensate the light emission of the upper electronic paper structure to improve the image display quality. Alternatively, two electronic paper structures can be set to display the same image together to achieve high-resolution image display.

[0044] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of an electronic paper provided in an embodiment of the present invention;

[0047] Figure 2A This is a schematic diagram of another type of electronic paper provided in an embodiment of the present invention;

[0048] Figure 2B This is a schematic diagram of another type of electronic paper provided in an embodiment of the present invention;

[0049] Figure 3 This is a schematic diagram of another type of electronic paper provided in an embodiment of the present invention;

[0050] Figure 4 This is a schematic diagram of another type of electronic paper provided in an embodiment of the present invention;

[0051] Figure 5 This is a schematic diagram of another type of electronic paper provided in an embodiment of the present invention;

[0052] Figure 6 This is a schematic diagram of another type of electronic paper provided in an embodiment of the present invention;

[0053] Figure 7 This is a flowchart of a method for manufacturing electronic paper according to an embodiment of the present invention;

[0054] Figure 8 This is a process diagram illustrating the fabrication of a second substrate and a first electrophoretic layer according to an embodiment of the present invention;

[0055] Figure 9 This is a process diagram illustrating the fabrication of a third substrate and a second electrophoretic layer according to an embodiment of the present invention;

[0056] Figure 10 This is a process diagram of the fabrication of a first substrate provided in an embodiment of the present invention. Detailed Implementation

[0057] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0058] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0059] This invention provides an electronic paper. Figure 1 This is a schematic diagram of the structure of an electronic paper provided in an embodiment of the present invention, for reference. Figure 1 Electronic paper includes:

[0060] A first substrate 11, the first substrate 11 includes a common electrode layer 110;

[0061] The second substrate 12 includes a first electrode layer 122;

[0062] The first electrophoretic layer 21 is disposed between the first substrate 11 and the second substrate 12; the first electrophoretic layer 21 includes a first microcup structure layer 210, the first microcup structure layer 210 includes a plurality of first sub-pixel grooves 41, and each first sub-pixel groove 41 is provided with electrophoretic liquid 50; the first electrode layer 122 includes a plurality of first electrode blocks 31, each first electrode block 31 corresponding to a first sub-pixel groove 41.

[0063] The third substrate 13 includes a second electrode layer 132;

[0064] The second electrophoretic layer 22 is disposed between the surface of the first substrate 11 away from the first electrophoretic layer 21 and the third substrate 13; wherein, the second electrophoretic layer 22 includes a second microcup structure layer 220, the second microcup structure layer 220 includes a plurality of second sub-pixel grooves 42, and each second sub-pixel groove 42 is provided with electrophoretic liquid 50; the second electrode layer 132 includes a plurality of second electrode blocks 32, each second electrode block 32 corresponding to a second sub-pixel groove 42;

[0065] Each first sub-pixel groove 41 overlaps with a second sub-pixel groove 42 in the vertical projection of the second electrophoretic layer 22. The light emitted color of the electrophoretic liquid 50 in the first sub-pixel groove 41 is different from the light emitted color of the electrophoretic liquid 50 in the overlapping second sub-pixel groove 42.

[0066] The common electrode layer 110, the first electrophoresis layer 21, and the first electrode layer 122 constitute the first electronic paper structure, and the common electrode layer 110, the second electrophoresis layer 22, and the second electrode layer 132 constitute the second electronic paper structure. The first substrate 11 may include one common electrode layer 110, and the first and second electronic paper structures may share the same common electrode layer 110. Alternatively, the first substrate 11 may include two common electrode layers 110, with each electronic paper structure employing one common electrode layer 110.

[0067] The first sub-pixel groove 41 may or may not penetrate the first microcup structure layer 210. The second sub-pixel groove 42 may or may not penetrate the second microcup structure layer 220. The figure only shows, by way of example, that the first sub-pixel groove 41 penetrates the first microcup structure layer 210 and the second sub-pixel groove 42 penetrates the second microcup structure layer 220, and is not intended to limit the invention. Each first electrode block 31 corresponds to one first sub-pixel groove 41, and one first sub-pixel groove 41 forms one light-emitting sub-pixel. Each second electrode block 32 corresponds to one second sub-pixel groove 42, and one second sub-pixel groove 42 forms one light-emitting sub-pixel. The second substrate 12 may include a first driving circuit for driving the first electrophoretic layer 21. The first driving circuit is used to apply different voltages to the first electrode block 31 according to the image to be displayed, so as to move the charged color particles in the electrophoretic liquid and make the sub-pixel at the corresponding position of the first electrode block 31 emit light, thereby realizing image display. The third substrate 13 may include a second driving circuit for driving the second electrophoretic layer 22. The second driving circuit applies different voltages to the second electrode block 32 according to the image to be displayed, causing charged color particles in the electrophoretic solution to move, resulting in light emission from the sub-pixels at the corresponding positions of the second electrode block 32, thereby achieving image display. Furthermore, the first and second driving circuits can apply a fixed voltage to the common electrode layer 110. The vertical projection of each first sub-pixel groove 41 onto the second electrophoretic layer 22 overlaps with a second sub-pixel groove 42; this overlap may be coincident or partially overlapping.

[0068] Specifically, the light emitted from the first electrophoretic layer 21 can pass through the first substrate 11 and the second electrophoretic layer 22, and then be emitted from the third substrate 13. The light emitted from the second electrophoretic layer 22 is emitted from the third substrate 13. Alternatively, the light emitted from the second electrophoretic layer 22 can pass through the first substrate 11 and the first electrophoretic layer 21, and then be emitted from the second substrate 12. That is, the sub-pixels corresponding to the first sub-pixel groove 41 and the sub-pixels corresponding to the second sub-pixel groove 42 both emit light through the third substrate 13 or the second substrate 12. Since the emitted light color of the electrophoretic liquid 50 in the first sub-pixel groove 41 is different from the emitted light color of the electrophoretic liquid in the overlapping second sub-pixel groove 42, i.e., the emitted light colors of the sub-pixels corresponding to the first sub-pixel groove 41 and the second sub-pixel groove 42 are different, by controlling the voltage of the two sub-pixels, the two sub-pixels can jointly display the same image, which is equivalent to increasing the number of sub-pixels per unit area and improving the resolution of the electronic paper.

[0069] Furthermore, when the sub-pixels corresponding to the first sub-pixel groove 41 and the second sub-pixel groove 42 both emit light through the third substrate 13 or the second substrate 12, the sub-pixel portion of the electronic paper structure (hereinafter referred to as the lower electronic paper structure) that is far from the light-emitting side in the two-layer electronic paper structure can also be driven to participate in the display as needed. At this time, the lower electronic paper structure is used to perform light emission compensation on the electronic paper structure (hereinafter referred to as the upper electronic paper structure) that is adjacent to the light-emitting side in the two-layer electronic paper structure, thereby improving the image display quality.

[0070] Furthermore, the light emitted from the first electrophoretic layer 21 can be emitted from the second substrate 12, and the light emitted from the second electrophoretic layer 22 can be emitted from the third substrate 13. At this time, the two electronic paper structures are displayed independently, realizing double-sided display.

[0071] It should be noted that when both sub-pixels emit light from the same substrate, the first sub-pixel groove 41 can be configured to overlap with a second sub-pixel groove 42 in the vertical projection of the second electrophoretic layer 22. Alternatively, the charged particles in the electrophoretic liquid in the sub-pixel groove located on the light-emitting side can be configured to have gaps, so that the light emitted from the electrophoretic liquid in the lower sub-pixel groove can pass through the upper electrophoretic liquid before being emitted.

[0072] In this embodiment of the invention, the common electrode layer 110, the first electrophoresis layer 21, and the first electrode layer 122 constitute a first electronic paper structure, while the common electrode layer 10, the second electrophoresis layer 22, and the second electrode layer 132 constitute a second electronic paper structure. The two electronic paper structures can be configured to emit light from the second substrate and the third substrate respectively, achieving double-sided display. Furthermore, by voltage control of the two electronic paper structures, both layers can emit light through either the second substrate or the third substrate. In this case, sub-pixels in the lower electronic paper structure can be configured to participate in the display as needed, achieving light emission compensation for the upper electronic paper structure and improving image display quality. Alternatively, all sub-pixels in the lower electronic paper structure can be configured to participate in the display. In this case, the vertical projection of the first sub-pixel groove 41 onto the second electrophoresis layer 22 can partially overlap with a second sub-pixel groove 42. By voltage control of the two sub-pixel layers, both layers can display the same image, effectively increasing the number of sub-pixels per unit area and improving the resolution of the electronic paper. Therefore, the electronic paper in this embodiment of the invention can achieve double-sided display or single-sided display. In single-sided display, the lower electronic paper structure can be set to compensate the light emission of the upper electronic paper structure to improve the image display quality. Alternatively, two electronic paper structures can be set to display the same image together to achieve high-resolution image display.

[0073] Optionally, when all the charged particles in the electrophoretic solution in the first sub-pixel groove 41 are attached to the first electrode block 31, there are gaps between the charged particles.

[0074] And / or, when all the charged particles in the electrophoretic liquid in the second sub-pixel groove 42 are attached to the second electrode block 32, there are gaps between the charged particles.

[0075] Specifically, all the charged particles in the electrophoretic liquid in the first sub-pixel groove 41 are attached to the first electrode block 31. When there are gaps between the charged particles, the light emitted from the second electrophoretic layer 22 can be emitted through the gaps between the charged particles in the first sub-pixel groove 41, so that the two sub-pixels can display the same image together, thus improving the resolution of the electronic paper.

[0076] All the charged particles in the electrophoretic liquid in the second sub-pixel groove 42 are attached to the second electrode block 32. When there are gaps between the charged particles, the light emitted from the first electrophoretic layer 21 can be emitted through the gaps between the charged particles in the second sub-pixel groove 42, so that the two sub-pixels can display the same image together, thus improving the resolution of the electronic paper.

[0077] Figure 2A This is a schematic diagram of another electronic paper structure provided in an embodiment of the present invention. Optional, refer to... Figure 2A The first microcup structure layer 210 includes a plurality of first sub-pixel groove groups 410, each first sub-pixel groove group 410 including a first groove 411 and a second groove 412; a first electrophoretic liquid is disposed in the first groove 411 and a second electrophoretic liquid is disposed in the second groove 412.

[0078] The second microcup structure layer 220 includes a plurality of second sub-pixel groove groups 420. Each second sub-pixel groove group 420 includes a third groove 421 and a fourth groove 422. The third groove 421 is provided with a second electrophoretic liquid, and the fourth groove 422 is provided with a first electrophoretic liquid.

[0079] The first groove 411 and the third groove 421 overlap in their vertical projections on the first substrate 11, and the second groove 412 and the fourth groove 422 overlap in their vertical projections on the first substrate 11.

[0080] The first electrophoretic solution is used to emit the first color light, and the second electrophoretic solution is used to emit the second and third color light.

[0081] Specifically, the first, second, and third colors can be one of red, green, and blue, respectively. For example, the first electrophoretic solution includes charged particles of the first color, and the second electrophoretic solution includes charged particles of the second and third colors. The first-color charged particles are red, the second-color charged particles are green, and the third-color charged particles are blue. The first-color charged particles reflect the first-color light from the ambient light, causing the first electrophoretic solution to emit red light. The second-color charged particles reflect the second-color light from the ambient light, and the third-color charged particles reflect the third-color light from the ambient light. The second-color and third-color charged particles can be configured to move under different electric fields or have different moving speeds, thus achieving individual control of the second-color and third-color charged particles.

[0082] The first electrophoretic solution is used to emit the first color light, and the second electrophoretic solution is used to emit the second and third color light. Therefore, the first sub-pixel corresponding to the first groove 411 emits the first color light, the second sub-pixel corresponding to the second groove 412 emits the second and third color light, the third sub-pixel corresponding to the third groove 421 emits the first color light, and the fourth sub-pixel corresponding to the fourth groove 422 emits the second and third color light. In double-sided electronic paper display, the first and second sub-pixels can form a pixel unit, and the third and fourth sub-pixels can form a pixel unit. When both layers of electronic paper emit light from the same side, overlapping first and third sub-pixels can form a pixel unit, and overlapping second and fourth sub-pixels can form a pixel unit, achieving high-resolution single-sided display.

[0083] Optionally, the first electrophoretic solution includes black charged particles and red charged particles, or the first electrophoretic solution includes black charged particles, yellow charged particles and magenta charged particles; the second electrophoretic solution includes black charged particles, green charged particles and blue charged particles, or the second electrophoretic solution includes black charged particles, cyan charged particles, yellow charged particles and magenta charged particles.

[0084] Specifically, yellow and magenta charged particles absorb green and blue light from ambient light and reflect red light to appear red; cyan and yellow charged particles absorb red and blue light from ambient light and reflect green light to appear green; cyan and magenta charged particles absorb green and red light from ambient light and reflect blue light to appear blue. The first electrophoretic solution includes yellow and magenta charged particles, and the second electrophoretic solution includes cyan, yellow, and magenta charged particles. This allows the first electrophoretic solution to emit red light, the second electrophoretic solution to emit green light, and the third electrophoretic solution to emit blue light. Different colors are displayed through spatial subtractive color mixing, which can display more colors and theoretically achieve full-color display.

[0085] Optionally, the first electrophoretic solution also includes compensating charged particles, which are used to compensate for the emitted light brightness and / or emitted light color.

[0086] Specifically, the compensation charged particles can be white, yellow, or other colors. When the compensation charged particles are white, they reflect ambient light, which can improve the display brightness of the electronic paper. When the compensation charged particles are yellow or other colors, they can compensate for the emitted light color of the electronic paper.

[0087] In addition, the charged particles emitting the first color light and the compensated charged particles in the first electrophoretic solution can be set to move under different electric fields, or the charged particles emitting the first color light and the compensated charged particles in the first electrophoretic solution can be set to have different moving speeds, so as to achieve individual control of the charged particles emitting the first color light and the compensated charged particles.

[0088] Figure 2B This is a schematic diagram of another electronic paper structure provided in an embodiment of the present invention. Optional, refer to... Figure 2B Each first sub-pixel groove group 410 includes a fifth groove 413, a sixth groove 414, and a seventh groove 415; a third electrophoretic liquid is disposed in the fifth groove 413, a fourth electrophoretic liquid is disposed in the sixth groove 414, and a fifth electrophoretic liquid is disposed in the seventh groove 415; each second sub-pixel groove group 420 includes an eighth groove 423, a ninth groove 424, and a tenth groove 425; a third electrophoretic liquid is disposed in the eighth groove 423, a fourth electrophoretic liquid is disposed in the ninth groove 424, and a fifth electrophoretic liquid is disposed in the tenth groove 425; the third electrophoretic liquid is used to emit a first color light, the fourth electrophoretic liquid is used to emit a second color light, and the fifth electrophoretic liquid is used to emit a third color light.

[0089] Specifically, if the third electrophoretic solution emits the first color light, the fourth electrophoretic solution emits the second color light, and the fifth electrophoretic solution emits the third color light, then the fifth sub-pixel corresponding to the fifth groove 413 emits the first color light, the sixth sub-pixel corresponding to the sixth groove 414 emits the second color light, the seventh sub-pixel corresponding to the seventh groove 415 emits the third color light, the eighth sub-pixel corresponding to the eighth groove 423 emits the first color light, the ninth sub-pixel corresponding to the ninth groove 424 emits the second color light, and the tenth sub-pixel corresponding to the tenth groove 425 emits the third color light. When the electronic paper is displayed on both sides, the fifth, sixth, and seventh sub-pixels can form one pixel unit, and the eighth, ninth, and tenth sub-pixels can form another pixel unit.

[0090] Optionally, the third electrophoresis buffer includes black charged particles and red charged particles, or the third electrophoresis buffer includes black charged particles, yellow charged particles and magenta charged particles; the fourth electrophoresis buffer includes black charged particles and green charged particles, or the fourth electrophoresis buffer includes black charged particles, cyan charged particles and yellow charged particles; the fifth electrophoresis buffer includes black charged particles and blue charged particles, or the fifth electrophoresis buffer includes black charged particles, cyan charged particles and magenta charged particles.

[0091] It should be noted that the number of grooves included in each sub-pixel groove group is not specifically limited in this embodiment. For example, the first sub-pixel groove group 410 may also include four grooves, and the second sub-pixel groove group may also include four grooves.

[0092] Optionally, the first substrate 11 further includes a first reflective layer 113, the first electrode layer 122 and the second electrode layer 132 are transparent electrode layers, the first reflective layer 113 is used to reflect light back to the first electrophoretic layer 21, so that the light passes through the first electrophoretic layer 21 and exits through the second substrate 12, and / or, the first reflective layer 113 is used to reflect light back to the second electrophoretic layer 22, so that the light passes through the second electrophoretic layer 22 and exits through the third substrate 13;

[0093] or, Figure 3 This is a schematic diagram of another type of electronic paper provided in an embodiment of the present invention, for reference. Figure 3 The second substrate 12 also includes a second reflective layer 124, the common electrode layer 110 and the second electrode layer 132 are transparent electrode layers, and the second reflective layer is used to reflect light back to the first electrophoresis layer 21 and the second electrophoresis layer 22, so that the light passes through the first electrophoresis layer 21 and the second electrophoresis layer 22 and then exits through the third substrate 13.

[0094] or, Figure 4 This is a schematic diagram of another type of electronic paper provided in an embodiment of the present invention, for reference. Figure 4The third substrate 13 also includes a third reflective layer 134. The common electrode layer 110 and the first electrode layer 122 are transparent electrode layers. The third reflective layer 134 is used to reflect light back to the first electrophoresis layer 21 and the second electrophoresis layer 22, so that the light passes through the first electrophoresis layer 21 and the second electrophoresis layer 22 and then exits through the second substrate 12.

[0095] For details, please refer to Figure 2A When the first substrate 11 includes a first reflective layer 113, the two electronic paper structures are displayed separately. The first reflective layer 113 reflects light incident from the direction of the first electrophoretic layer 21 back to the first electrophoretic layer 21 and light incident from the direction of the second electrophoretic layer 22 back to the second electrophoretic layer 22, which can avoid mutual interference between the two electronic paper structures and improve the double-sided display quality.

[0096] refer to Figure 3 When the second substrate 12 includes the second reflective layer 124, the third substrate 13 is the light-emitting surface of the entire electronic paper. The second reflective layer 124 reflects the light incident on it back to the first electrophoretic layer 21 and the second electrophoretic layer 22, so that the light passes through the third substrate 13 and is emitted. This can improve the light utilization rate and improve the overall brightness of the electronic paper.

[0097] refer to Figure 4 When the second substrate 13 includes the third reflective layer 134, the second substrate 12 is the light-emitting surface of the entire electronic paper. The third reflective layer 134 reflects the light incident on it back to the first electrophoretic layer 21 and the second electrophoretic layer 22, so that the light passes through the second substrate 12 and is emitted. This can improve the light utilization rate and improve the overall brightness of the electronic paper.

[0098] Optionally, when the first substrate includes a first reflective layer, the common electrode layer is a reflective electrode layer, and the common electrode is reused as the first reflective layer;

[0099] When the second substrate includes a second reflective layer, the first electrode layer is a reflective electrode layer, and the first electrode layer is reused as the second reflective layer.

[0100] When the third substrate includes a third reflective layer, the second electrode layer is a reflective electrode layer and the second electrode layer is reused as the third reflective layer.

[0101] Specifically, the reflective electrode layer can be made of a non-transparent conductive layer, or it can be made of a stacked structure, such as a silver / indium tin oxide / silver stacked structure or a silver / indium tin oxide stacked structure, so that the reflective electrode layer can reflect light.

[0102] Optional, see reference Figure 4 The first substrate 11 includes a first protective layer 111 and a second protective layer 112, wherein the first protective layer 111, the common electrode layer 110 and the second protective layer 112 are stacked sequentially.

[0103] The second substrate 12 also includes a first driving plate 121 and a first insulating layer 123, wherein the first driving plate 121, the first electrode layer 122 and the first insulating layer 123 are stacked sequentially.

[0104] The first microcup structure layer 210 is disposed on the surface of the first insulating layer 123. The material used for the first microcup structure layer 210 includes a polymer whose adhesion can be enhanced by light. The first microcup structure layer 210 is bonded together with the first protective layer 111 to seal the electrophoretic liquid in the first sub-pixel groove 41.

[0105] The third substrate 13 also includes a second driving plate 131 and a second insulating layer 133, wherein the second driving plate 131, the second electrode layer 132 and the second insulating layer 133 are stacked sequentially.

[0106] The second microcup structure layer 220 is disposed on the surface of the second insulating layer 133. The material used for the second microcup structure layer 220 includes a polymer whose adhesion can be enhanced by light. The second microcup structure layer 220 is bonded together with the second protective layer 112 to seal the electrophoretic liquid in the second sub-pixel groove 42.

[0107] Specifically, the adhesiveness of a light-enhanced polymer increases after irradiation with light of a set wavelength. The wavelength can be selected based on the polymer's properties, for example, it could be ultraviolet light. The first microcup structure layer 210 and the second microcup structure layer 220 can be made of materials that exhibit adhesiveness after light irradiation, high stability after curing, and a certain structural strength. For example, the first microcup structure layer 210 and the second microcup structure layer 220 can be made of a photocurable adhesive composition. This photocurable adhesive composition can maintain its adhesiveness for a considerable period after light irradiation and exhibits high adhesive strength after curing.

[0108] The specific formation process of electronic paper can be as follows: after forming a first microcup structure layer 210 and a second microcup structure layer 220 on the surface of the second substrate 12 and the third substrate 13 respectively, electrophoretic liquid 50 is filled into the first sub-pixel groove 41 of the first microcup structure layer 210, the first substrate 11 is placed on the surface of the first microcup structure layer 210, and the first microcup structure layer 210 is exposed to improve the adhesion of the first microcup structure layer 210, so that the first protective layer 111 is bonded to the first microcup structure layer 210.

[0109] Then, electrophoretic liquid 50 is filled into the second sub-pixel groove 42 of the second microcup structure layer 220, the second protective layer 112 is placed in contact with the second microcup structure layer 220, and the second microcup structure layer 220 is exposed to improve the adhesion of the second microcup structure layer 220, so that the second protective layer 112 and the second microcup structure layer 220 are bonded together.

[0110] In addition, the first microcup structure layer 210 and the second microcup structure layer 220 can both be fabricated using the following process: first, a microcup material layer is formed, and then a photomask is used to pattern the microcup material layer through photolithography to form the first microcup structure layer 210 (second microcup structure layer 220) with the first sub-pixel groove 41 (second sub-pixel groove 42).

[0111] In this embodiment, the materials used for the first microcup structure layer 210 and the second microcup structure layer 220 include a photopolymer that enhances adhesion. After the electrophoretic solution 50 is placed in the first microcup structure layer 210, the fabricated first substrate 11 can be directly placed on the surface of the first microcup structure layer 210. By exposing the first microcup structure layer 210, the first microcup structure layer 210 is directly bonded to the first protective layer 111, eliminating the need for adhesive layers and encapsulation layers on the surface of the first microcup structure layer 210. After the electrophoretic solution 50 is placed in the structural layer 220, the fabricated structure can be directly placed on the surface of the second microcup structural layer 220. By exposing the second microcup structural layer 220, the second microcup structural layer 220 is directly bonded to the second protective layer 112. There is no need to set adhesive layers and encapsulation layers on the surface of the second microcup structural layer 220, which reduces the process of setting adhesive layers and encapsulation layers. Furthermore, the second substrate 12 and the third substrate 13 can be fabricated simultaneously with the first substrate 10, which shortens the process time and improves production efficiency.

[0112] Optionally, the materials used for the first microcup structural layer 210 and the second microcup structural layer 220 include crosslinking compounds, photoalkali-generating agents, and adhesive-imparting components; each molecule of the crosslinking compound has at least two crosslinking functional groups, and the at least two crosslinking functional groups include at least one of (meth)acryloyl, isocyanate, epoxy, acid anhydride, and hydrolyzable silyl groups; the photoalkali-generating agent includes o-nitrobenzyl photoalkali-generating agents or ketoprofen photoalkali-generating agents; the adhesive-imparting component includes at least one of (meth)acrylic polymers, polyesters, polyurethanes, polyolefins, and silicone polymers.

[0113] The above-mentioned material has a long adhesive retention time after light exposure and a short curing time at room temperature. After curing, it can stably maintain the cured form, ensuring that the first microcup structure layer 210 and the second microcup structure layer 220 can maintain their form for a long time and can better bond with the insulating layer.

[0114] Optionally, the materials used for the first microcup structural layer 210 and the second microcup structural layer 220 include carboxyl-containing oligomers and monomers.

[0115] The carboxyl-containing oligomer matrix and monomers, after photocuring, exhibit strong solvent resistance. The cross-linking of monomers and oligomers forms a network structure, enhancing the corrosion resistance and airtightness of the first and second microcup structural layers 210. The flexibility of the first and second microcup structural layers 210 can be adjusted by modifying the ratio of oligomers to monomers. The oligomers can be made of acrylate-based materials. First and second microcup structural layers 210 and 210 made of acrylate-based materials exhibit low volatility, corrosion resistance, and high airtightness, and are easily made flexible and have high resolution.

[0116] Figure 5 This is a schematic diagram of another electronic paper structure provided in an embodiment of the present invention. Optional, refer to... Figure 5 The first driving board 121 includes a first driving circuit 51. The first sub-pixel groove 41 does not overlap with the first driving circuit 51 in the vertical projection of the first driving board 121. Alternatively, the first driving circuit 51 is made of a light-transmitting material.

[0117] The second driving board 131 includes a second driving circuit 52. The second sub-pixel groove 42 does not overlap with the second driving circuit 52 in the vertical projection of the second driving board 131. Alternatively, the material used for the second driving circuit 52 is a light-transmitting material.

[0118] This configuration avoids the first driving circuit 51 from affecting the light emission of the electrophoretic liquid in the first sub-pixel groove 41, and at the same time avoids the second driving circuit 52 from affecting the light emission of the electrophoretic liquid in the second sub-pixel groove 42.

[0119] Figure 6 This is a schematic diagram of another electronic paper structure provided in an embodiment of the present invention. Optional, refer to... Figure 6 Electronic paper also includes:

[0120] Sealant 60 is disposed between the second substrate 12 and the third substrate 13;

[0121] A sealing adhesive 60 is disposed around the first substrate 11, the first electrophoretic layer 21, and the second electrophoretic layer 22;

[0122] The sealing adhesive 60 contains conductive particles. A first signal transmission electrode 61 is disposed on the surface of the second substrate 12, and a second signal transmission electrode 62 is disposed on the surface of the third substrate 13. The first signal transmission electrode 61 and the second signal transmission electrode 62 are electrically connected through the sealing adhesive.

[0123] The first signal transmission electrode 61 or the second signal transmission electrode 62 is electrically connected to the common electrode layer 110 through the conductive structure 63.

[0124] Specifically, the sealing adhesive 60 is used to seal the entire electronic paper, sealing the first electrophoresis layer 21 and the second electrophoresis layer 22, etc., between the third substrate 13 and the second substrate 12. The first signal transmission electrode 61 is electrically connected to the first driving circuit in the first driving board 121. The first driving circuit transmits a driving signal to the common electrode layer 110 through the first signal transmission electrode 61. For example, the first driving circuit outputs a fixed voltage signal to the first electrode layer 20 through the signal transmission electrode 61. The second signal transmission electrode 62 is electrically connected to the second driving circuit in the second driving board 131. The second driving circuit transmits a driving signal to the common electrode layer 110 through the second signal transmission electrode 62. Conductive structures 63, such as conductive pillars, can be provided on the first signal transmission electrode 61 or the second signal transmission electrode 62 to achieve electrical connection between the first signal transmission electrode 61 or the second signal transmission electrode 62 and the common electrode layer 110. Optionally, by doping conductive particles into the sealing adhesive 60, the sealing simultaneously achieves the interconnection of the first signal transmission electrode 61 and the second signal transmission electrode 62, thereby realizing the interconnection between the common electrode layer 110 and the first signal transmission electrode 61 and the second signal transmission electrode 62.

[0125] It should be noted that the conductive particles may include highly conductive particles such as gold particles, copper particles, or silver ions. The sealant may include at least two layers of sealant; each sub-sealant is disposed around the first substrate 11, the first electrophoretic layer 21, and the second electrophoretic layer 22, thereby improving the overall sealing of the electronic paper.

[0126] This invention also provides a method for manufacturing electronic paper. Figure 7 This is a flowchart of a method for manufacturing electronic paper according to an embodiment of the present invention, see reference. Figure 7 The method includes:

[0127] S101. A second substrate is provided, the second substrate including a first electrode layer.

[0128] S102. A first electrophoretic layer is formed on the surface of the second substrate; the first electrophoretic layer includes a first microcup structure layer, the first microcup structure layer includes a plurality of first sub-pixel grooves, and each first sub-pixel groove is provided with electrophoretic liquid; the first electrode layer includes a plurality of first electrode blocks, each first electrode block corresponding to a first sub-pixel groove.

[0129] S103. A third substrate is provided, the third substrate including a second electrode layer.

[0130] S104. A second electrophoretic layer is formed on the surface of the third substrate; wherein the second electrophoretic layer includes a second microcup structure layer, the second microcup structure layer includes a plurality of second sub-pixel grooves, and each second sub-pixel groove is provided with electrophoretic liquid; the second electrode layer includes a plurality of second electrode blocks, each second electrode block corresponding to a second sub-pixel groove.

[0131] Figure 8 This is a process diagram illustrating the fabrication of a second substrate and a first electrophoretic layer according to an embodiment of the present invention. Figure 9 This is a process diagram illustrating the fabrication of a third substrate and a second electrophoretic layer according to an embodiment of the present invention. (Refer to...) Figure 8 A first electrode layer 122, a first insulating layer 123, and a first microcup structure layer 210 can be sequentially fabricated on the surface of the first driving board 121. After the first microcup structure layer 210 is fabricated, electrophoretic solution 50 is filled into the first sub-pixel groove 41. (Reference) Figure 9 A second electrode layer 132, a second insulating layer 133, and a second microcup structure layer 220 can be sequentially fabricated on the surface of the second driving board 131. After the second microcup structure layer 220 is fabricated, electrophoretic liquid is filled into the second sub-pixel groove 412. The second substrate 12 and the first electrophoretic layer 21 can be fabricated simultaneously with the third substrate 13 and the second electrophoretic layer 22, thereby improving the efficiency of electronic paper production.

[0132] S105. A first substrate is disposed on the surface of the first electrophoretic layer away from the second substrate, and the first substrate includes a common electrode layer.

[0133] Figure 10 This is a process diagram illustrating the fabrication of a first substrate according to an embodiment of the present invention. (Refer to...) Figure 10 Alternatively, the first protective layer 111 can be directly attached to the surface of the first microcup structure layer 210. After attaching the first protective layer 111, a common electrode layer 110 can be fabricated on the surface of the first protective layer 111, and then a second protective layer 112 can be fabricated on the surface of the common electrode layer 110. Alternatively, the first substrate 11 can be prefabricated, and the entire first substrate 11 can be placed on the surface of the first microcup structure layer 210, thus adhering the first microcup structure layer 210 and the first protective layer 111 together.

[0134] S106. The surface of the first substrate away from the first electrophoretic layer is bonded to the surface of the second electrophoretic layer away from the third substrate; wherein, the vertical projection of each first sub-pixel groove on the second electrophoretic layer overlaps with a second sub-pixel groove, and the light-emitting color of the electrophoretic liquid in the first sub-pixel groove is different from the light-emitting color of the electrophoretic liquid in the overlapping second sub-pixel groove.

[0135] Specifically, it can be Figure 10The second substrate 12, the first electrophoretic layer 21, and the first substrate 11, as shown in the figure, are inverted and... Figure 9 The second protective layer 112 is bonded to the surface of the second microcup structure layer 220 as shown.

[0136] The method for manufacturing electronic paper provided in this embodiment of the invention belongs to the same inventive concept as the electronic paper provided in any embodiment of the invention. For technical details not covered in this embodiment, please refer to the electronic paper provided in any embodiment of the invention.

[0137] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0138] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An electronic paper, characterized by comprising: The electronic paper comprises: a first substrate, the first substrate comprising a common electrode layer; a second substrate, the second substrate comprising a first electrode layer; a first electrophoretic layer, the first electrophoretic layer being arranged between the first substrate and the second substrate; the first electrophoretic layer comprising a first micro-cup structure layer, the first micro-cup structure layer comprising a plurality of first sub-pixel grooves, each of the first sub-pixel grooves being arranged with electrophoretic liquid; the first electrode layer comprising a plurality of first electrode blocks, each of the first electrode blocks corresponding to one of the first sub-pixel grooves; a third substrate, the third substrate comprising a second electrode layer; a second electrophoretic layer, the second electrophoretic layer being arranged between a surface of the first substrate away from the first electrophoretic layer and the third substrate; wherein the second electrophoretic layer comprises a second micro-cup structure layer, the second micro-cup structure layer comprising a plurality of second sub-pixel grooves, each of the second sub-pixel grooves being arranged with electrophoretic liquid; the second electrode layer comprising a plurality of second electrode blocks, each of the second electrode blocks corresponding to one of the second sub-pixel grooves; a vertical projection of each of the first sub-pixel grooves on the second electrophoretic layer overlaps one of the second sub-pixel grooves, and the light-emitting color of the electrophoretic liquid in the first sub-pixel groove is different from the light-emitting color of the electrophoretic liquid in the second sub-pixel groove overlapping the first sub-pixel groove; the light emitted by the first electrophoretic layer is emitted by the third substrate, and the light emitted by the second electrophoretic layer is emitted by the third substrate; or the light emitted by the second electrophoretic layer is emitted by the second substrate, and the light emitted by the first electrophoretic layer is emitted by the second substrate.

2. The electronic paper according to claim 1, wherein: the first micro-cup structure layer comprises a plurality of first sub-pixel groove groups, and the second micro-cup structure layer comprises a plurality of second sub-pixel groove groups; wherein: each of the first sub-pixel groove groups comprises a first groove and a second groove, the first groove is arranged with first electrophoretic liquid, and the second groove is arranged with second electrophoretic liquid; each of the second sub-pixel groove groups comprises a third groove and a fourth groove, the third groove is arranged with second electrophoretic liquid, and the fourth groove is arranged with first electrophoretic liquid; the vertical projection of the first groove and the third groove on the first substrate overlaps, and the vertical projection of the second groove and the fourth groove on the first substrate overlaps; the first electrophoretic liquid is used to emit first color light, and the second electrophoretic liquid is used to emit second color light and third color light; or, each of the first sub-pixel groove groups comprises a fifth groove, a sixth groove, and a seventh groove; the fifth groove is arranged with third electrophoretic liquid, the sixth groove is arranged with fourth electrophoretic liquid, and the seventh groove is arranged with fifth electrophoretic liquid; each of the second sub-pixel groove groups comprises an eighth groove, a ninth groove, and a tenth groove; the eighth groove is arranged with third electrophoretic liquid, the ninth groove is arranged with fourth electrophoretic liquid, and the tenth groove is arranged with fifth electrophoretic liquid; the third electrophoretic liquid is used to emit first color light, the fourth electrophoretic liquid is used to emit second color light, and the fifth electrophoretic liquid is used to emit third color light.

3. The electronic paper according to claim 2, wherein: The first electrophoretic liquid includes black charged particles and red charged particles, or the first electrophoretic liquid includes black charged particles, yellow charged particles and magenta charged particles; the second electrophoretic liquid includes black charged particles, green charged particles and blue charged particles, or the second electrophoretic liquid includes black charged particles, cyan charged particles, yellow charged particles and magenta charged particles; The third electrophoretic liquid includes black charged particles and red charged particles, or the third electrophoretic liquid includes black charged particles, yellow charged particles and magenta charged particles; the fourth electrophoretic liquid includes black charged particles and green charged particles, or the fourth electrophoretic liquid includes black charged particles, cyan charged particles and yellow charged particles; the fifth electrophoretic liquid includes black charged particles and blue charged particles, or the fifth electrophoretic liquid includes black charged particles, cyan charged particles and magenta charged particles; The first electrophoretic liquid further includes compensation charged particles, and the compensation charged particles are used for compensating light emission brightness and / or light emission color.

4. The electronic paper of claim 1, wherein: When all the charged particles in the electrophoretic liquid in the first sub-pixel groove are attached to the first electrode block, there are gaps between the charged particles; And / or, when all the charged particles in the electrophoretic liquid in the second sub-pixel groove are attached to the second electrode block, there are gaps between the charged particles.

5. The electronic paper of claim 1, wherein: The first substrate further includes a first reflective layer, the first electrode layer and the second electrode layer are transparent electrode layers, and the first reflective layer is used for reflecting light back to the first electrophoretic layer, so that the light passes through the second substrate after being affected by the first electrophoretic layer, and / or the first reflective layer is used for reflecting light back to the second electrophoretic layer, so that the light passes through the third substrate after being affected by the second electrophoretic layer; Or, the second substrate further includes a second reflective layer, the common electrode layer and the second electrode layer are transparent electrode layers, and the second reflective layer is used for reflecting light back to the first electrophoretic layer and the second electrophoretic layer, so that the light passes through the third substrate after being affected by the first electrophoretic layer and the second electrophoretic layer; Or, the third substrate further includes a third reflective layer, the common electrode layer and the first electrode layer are transparent electrode layers, and the third reflective layer is used for reflecting light back to the first electrophoretic layer and the second electrophoretic layer, so that the light passes through the second substrate after being affected by the first electrophoretic layer and the second electrophoretic layer.

6. The electronic paper of claim 5, wherein: When the first substrate includes a first reflective layer, the common electrode layer is a reflective electrode layer, and the common electrode is multiplexed as the first reflective layer; When the second substrate includes a second reflective layer, the first electrode layer is a reflective electrode layer, and the first electrode layer is multiplexed as the second reflective layer; When the third substrate includes a third reflective layer, the second electrode layer is a reflective electrode layer, and the second electrode layer is multiplexed as the third reflective layer.

7. The electronic paper of claim 1, wherein: The first substrate further comprises a first protective layer and a second protective layer, and the first protective layer, the common electrode layer and the second protective layer are sequentially stacked; The second substrate further comprises a first driving plate and a first insulating layer, and the first driving plate, the first electrode layer and the first insulating layer are sequentially stacked; the first micro-cup structure layer is arranged on the surface of the first insulating layer, the material of the first micro-cup structure layer comprises a light-illuminable adhesive polymer, and the first micro-cup structure layer is bonded with the first protective layer to seal the electrophoretic liquid in the first sub-pixel groove; The third substrate further comprises a second driving plate and a second insulating layer, and the second driving plate, the second electrode layer and the second insulating layer are sequentially stacked; the second micro-cup structure layer is arranged on the surface of the second insulating layer, the material of the second micro-cup structure layer comprises a light-illuminable adhesive polymer, and the second micro-cup structure layer is bonded with the second protective layer to seal the electrophoretic liquid in the second sub-pixel groove.

8. The electronic paper of claim 7, further comprising: The first driving plate comprises a first driving circuit, and the vertical projection of the first driving plate does not overlap the first driving circuit, or the material of the first driving circuit is a light-transmitting material; The second driving plate comprises a second driving circuit, and the vertical projection of the second driving plate does not overlap the second driving circuit, or the material of the second driving circuit is a light-transmitting material.

9. The electronic paper of claim 1, wherein, Further comprising: A sealant is arranged between the second substrate and the third substrate; The sealant surrounds the first substrate, the first electrophoretic layer and the second electrophoretic layer; The sealant comprises conductive particles, the second substrate is provided with a first signal transmission electrode, the third substrate is provided with a second signal transmission electrode, and the first signal transmission electrode and the second signal transmission electrode are electrically connected through the sealant; The first signal transmission electrode or the second signal transmission electrode is electrically connected to the common electrode layer through a conductive structure.

10. A method for manufacturing electronic paper, characterized by comprising: Further comprising: Providing a second substrate, the second substrate comprising a first electrode layer; A first electrophoretic layer is arranged on the surface of the second substrate; the first electrophoretic layer comprises a first micro-cup structure layer, the first micro-cup structure layer comprises a plurality of first sub-pixel grooves, and each first sub-pixel groove is filled with electrophoretic liquid; the first electrode layer comprises a plurality of first electrode blocks, and each first electrode block corresponds to a first sub-pixel groove; Providing a third substrate, the third substrate comprising a second electrode layer; A second electrophoretic layer is arranged on the surface of the third substrate; the second electrophoretic layer comprises a second micro-cup structure layer, the second micro-cup structure layer comprises a plurality of second sub-pixel grooves, and each second sub-pixel groove is filled with electrophoretic liquid; the second electrode layer comprises a plurality of second electrode blocks, and each second electrode block corresponds to a second sub-pixel groove; The first electrophoretic layer is arranged on a first substrate away from a surface of the second substrate, and the first substrate comprises a common electrode layer therein; The surface of the first substrate away from the first electrophoretic layer is attached to the surface of the third substrate away from the second electrophoretic layer; wherein the vertical projection of each first sub-pixel groove on the second electrophoretic layer overlaps with one second sub-pixel groove, and the light-emitting color of the electrophoretic liquid in the first sub-pixel groove is different from that of the electrophoretic liquid in the second sub-pixel groove overlapping therewith; The light emitted by the first electrophoretic layer is emitted by the third substrate, and the light emitted by the second electrophoretic layer is emitted by the third substrate; or the light emitted by the second electrophoretic layer is emitted by the second substrate, and the light emitted by the first electrophoretic layer is emitted by the second substrate.

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