Display panel, manufacturing method thereof and electronic paper

Abstract

The invention discloses a display panel and a manufacturing method thereof, and electronic paper. The display panel comprises a first array substrate and a first substrate; the first substrate is arranged on the first array substrate, the first substrate is provided with a first pixel space, and a first photonic crystal, a first black substance and a first dispersion medium are accommodated in the first pixel space; wherein the first array substrate, the first substrate, the first photonic crystal and the first dispersion medium can transmit light; the display panel comprises a display state and a transparent state, in the display state, the first photonic crystals are uniformly dispersed in the first dispersion medium, and at least part of the first black substance is adsorbed to the bottom wall of the first pixel space; in a transparent state, the first photonic crystal gathers in the first dispersion medium, and the first black substance is adsorbed on the side wall of the first pixel space. The electronic paper applying the display panel can have high color display and high transparency.

Description

Technical Field

[0001] The present invention relates to the technical field of display devices, and in particular to a display panel and a manufacturing method thereof, and electronic paper. Background Art

[0002] E-paper, also known as digital paper, is an ultra-thin, ultra-light display, often described as "paper-thin, flexible, and rewritable." E-paper uses a reflective display, reflecting ambient light to display content rather than actively emitting light. This provides clear, natural viewing in all lighting conditions, similar to reading a paper book, and reduces eye fatigue after prolonged viewing.

[0003] With the advancement of electronic paper, users have higher expectations for it. Transparent electronic paper displays are an emerging display technology, offering advantages such as transparency, low power consumption, and sunlight visibility. However, existing transparent electronic paper displays still face certain limitations. In particular, their color performance is relatively limited, making full-color display difficult to achieve, and their transparency is poor when display is not required. Therefore, how to improve the full-color display quality and transparency of transparent electronic paper has become a key issue. Summary of the Invention

[0004] The purpose of the present invention is to provide a display panel and a manufacturing method thereof, and electronic paper, so as to solve the problem that electronic paper has poor full-color display and transparent display effects.

[0005] To achieve the purpose of the present invention, the present invention provides the following technical solutions: In a first aspect, the present invention provides a display panel, comprising a first array substrate and a first base; the first base is arranged on the first array substrate, and the first base is provided with a first pixel space, in which a first photonic crystal, a first black substance and a first dispersion medium are accommodated; wherein the first array substrate, the first base, the first photonic crystal and the first dispersion medium are all capable of transmitting light; the display panel includes a display state and a transparent state, in which, in the display state, the first photonic crystals are uniformly dispersed in the first dispersion medium, and at least part of the first black substance is adsorbed on the bottom wall of the first pixel space; in the transparent state, the first photonic crystals are aggregated in the first dispersion medium, and the first black substance is adsorbed on the side walls of the first pixel space.

[0006] In some embodiments, the first photonic crystal includes one or more of silicon dioxide, polystyrene, polymethyl methacrylate, and silicon nitride.

[0007] In some embodiments, the first dispersion medium includes one or more of propylene carbonate, polyethylene glycol, formanilide, diethylene glycol ethyl ether acrylate, polychlorinated biphenyls, ethanol, ether, acetone, and toluene.

[0008] In some embodiments, the first black substance includes one or more of carbon black, graphene, carbon nanotubes, graphite, ruthenium dioxide, and black tin oxide.

[0009] In some embodiments, the first black substance includes a first black sub-substance and a second black sub-substance, and the first black sub-substance and the second black sub-substance have different charges; in the display state, the first black sub-substance is uniformly dispersed in the first dispersion medium, and the second black sub-substance is adsorbed on the bottom wall of the first pixel space.

[0010] In some embodiments, the display panel also includes a non-transparent state. In the non-transparent state, the first photonic crystals are aggregated in the first dispersion medium, the first black sub-substance is adsorbed on the side walls of the first pixel space, and the second black sub-substance is adsorbed on the bottom wall of the first pixel space.

[0011] In some embodiments, the first substrate includes a supporting body and a stabilizing layer, the supporting body is provided with the first pixel space, and the stabilizing layer covers the inner wall of the first pixel space.

[0012] In some embodiments, the support body includes one or more of positive photoresist and negative photoresist.

[0013] In some embodiments, the stabilization layer includes one or more of silicon carbide and silicon oxide.

[0014] In some embodiments, the display panel further includes a second array substrate and a second base; the second array substrate is arranged on the side of the first array substrate facing away from the first base; the second base is arranged on the side of the second array substrate facing away from the first array substrate, and the second base is provided with a second pixel space, in which a second photonic crystal, a second black substance and a second dispersion medium are accommodated; wherein, the second array substrate, the second base, the second photonic crystal and the second dispersion medium are all capable of transmitting light; in the transparent state, the second photonic crystal is deposited and aggregated in the first dispersion medium, and the second black substance is adsorbed on the side wall of the second pixel space.

[0015] In a second aspect, the present invention provides a method for manufacturing a display panel, which is used to manufacture a display panel as described in any one of the embodiments of the first aspect, and the manufacturing method includes: arranging a first substrate on a first array substrate, and opening a first pixel space on the first substrate to obtain a first substrate having a first pixel space; injecting a first photonic crystal, a first black substance and a first dispersion medium into the first pixel space, and encapsulating the first substrate to obtain the display panel.

[0016] In some embodiments, the first substrate is disposed on the first array substrate, and the first pixel space is opened on the first substrate, including: disposing a supporting body on the first array substrate, and opening the first pixel space on the supporting body; depositing a stabilizing material on the inner wall of the first pixel space, the stabilizing material forming a stabilizing layer and covering the inner wall of the first pixel space.

[0017] In a third aspect, the present invention provides an electronic paper, comprising a display panel as described in any one of the embodiments of the first aspect; or, comprising a display panel manufactured by the method for manufacturing a display panel as described in any one of the embodiments of the second aspect.

[0018] The present invention provides a display panel with high full-color display and high transparency display effects. By adding a first photonic crystal in a first pixel space, the first photonic crystal is uniformly dispersed in a first dispersion medium in a display state. The color reflection characteristics of the first photonic crystal are utilized to enable light to be reflected on the first photonic crystal to form a display screen. In a transparent state, the gathered first photonic crystals can transmit light due to their isotropy, so that the display panel can be transparent. In addition, by adding a first black substance in the first pixel space, the first black substance adsorbed on the bottom wall of the first pixel space in a display state can absorb stray light transmitted through the first photonic crystal, thereby greatly improving the full color during display. In a transparent state, the first black substance is adsorbed on the side wall of the first pixel space, and the first black substance will not affect the light transmitted through the first photonic crystal, thereby improving transparency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1is a schematic cross-sectional view of a display panel in a transparent state according to an embodiment; Figure 2 is a schematic cross-sectional view of a display panel in a display state according to an embodiment; Figure 3 is a schematic cross-sectional view of a plurality of pixel units of a display panel according to an embodiment; Figure 4 is a schematic cross-sectional view of a display panel in a non-transparent state according to an embodiment; Figure 5 is a schematic cross-sectional view of a display panel in a transparent state according to another embodiment; Figure 6 is a schematic cross-sectional view of a display panel in a non-transparent state according to another embodiment; Figure 7 is a schematic cross-sectional view of a display panel in a display state according to another embodiment; Figure 8 is a cross-sectional schematic diagram of a first substrate including a support body and a stabilizing layer according to another embodiment; Figure 9 is a schematic diagram of a double-sided display of a display panel according to an embodiment; Figure 10 is a schematic diagram of another double-sided display of a display panel according to an embodiment; Figure 11 This is a schematic diagram of a method for manufacturing a display panel according to an embodiment; Figure 12 This is a schematic diagram of steps of a method for manufacturing a display panel according to an embodiment; Figure 13 This is a schematic diagram of specific steps of a method for manufacturing a display panel according to an embodiment; Figure 14 This is a schematic diagram of specific steps of a method for manufacturing a double-sided display panel according to an embodiment; Figure 15 The present invention is a schematic diagram of specific steps of a method for manufacturing a display panel including a support body and a stabilizing layer according to an embodiment.

[0021] Description of reference numerals: 100-display panel, 1-first array substrate, 2-first substrate, 3-first pixel space, 4-first photonic crystal, 5-first black substance, 6-first dispersion medium, 7-first packaging board, 8-second packaging board, 9-pixel space one, 10-pixel space two, 11-pixel space three, 12-support body, 13-stabilization layer, 14-photonic crystal one, 15-photonic crystal two, 16-photonic crystal three; 17-first black sub-substance, 18-second black sub-substance, 19-first electrode, 20-second electrode, 21-second array substrate, 22-second substrate, 23-second pixel space, 24-second photonic crystal, 25-second black substance, 26-second dispersion medium, 27-first display area, 28-second display area, 29-third black sub-substance, 30-fourth black sub-substance, 31-third packaging board. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be an intermediate component.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0026] E-paper, also known as digital paper, is an ultra-thin, ultra-light display, often described as "paper-thin, flexible, and rewritable." E-paper uses a reflective display, reflecting ambient light to display content rather than actively emitting light. This provides clear, natural viewing in all lighting conditions, similar to reading a paper book, and reduces eye fatigue after prolonged viewing.

[0027] With the progress of electronic paper, users have higher requirements for electronic paper. Transparent electronic paper display device is a new display technology, which has the advantages of transparency, low power consumption and sunlight visibility. However, the transparent electronic paper display device in the prior art still has certain limitations, especially the color performance of the transparent electronic paper display device is limited, it is difficult to realize full-color display, and the transparency effect is poor when no display is needed. Therefore, how to improve the full-color display effect of the transparent electronic paper and improve the transparency has become a key problem.

[0028] In view of the above technical problems, the present application provides a display panel and a transparent electronic paper display device using the display panel. The display panel not only has the characteristics of transparency, but also can provide full-color display effect, higher display quality and higher transparency.

[0029]

Display panel

[0030] In specific embodiments, referring to Figure 1 and Figure 2 , the display panel 100 further includes a first encapsulation plate 7 and a second encapsulation plate 8. The first encapsulation plate 7 and the second encapsulation plate 8 can both transmit light. Optionally, the first encapsulation plate 7 and the second encapsulation plate 8 can be glass plates or organic glass plates. The first encapsulation plate 7 is arranged on the side of the first array substrate 1 away from the first base 2, and the second encapsulation plate is arranged on the side of the first base 2 away from the first array substrate 1.

[0031] In specific embodiments, the first encapsulation plate 7, the first array substrate 1, the first base 2 and the second encapsulation plate 8 are sequentially stacked. The first base 2 forms the first pixel space 3 from the side away from the first array substrate 1, i.e. the opening of the first pixel space 3 faces the second encapsulation plate 8. The second encapsulation plate 8 is used to close the opening of the first pixel space 3. External light can pass through the second encapsulation plate 8 and irradiate into the first pixel space 3.

[0032] In a specific embodiment, an electric field can be formed between the second packaging board 8 and the bottom wall of the first substrate 2. The direction of the electric field can be from the second packaging board 8 to the bottom wall of the first substrate 2, or from the bottom wall of the first substrate 2 to the second packaging board 8. In other words, the second packaging board 8 can be the positive electrode and the bottom wall of the first substrate 2 can be the negative electrode; alternatively, the second packaging board 8 can be the negative electrode and the bottom wall of the first substrate 2 can be the positive electrode.

[0033] In a specific embodiment, the first pixel space 3 houses a first photonic crystal 4, a first black substance 5, and a first dispersion medium 6. The first dispersion medium 6 serves as a solvent, and the first photonic crystal 4 and the first black substance 5 serve as solutes dispersed within the first dispersion medium 6. The first photonic crystal 4 is transparent and reflects light, while the first black substance 5 is black and absorbs light. When an electric field is formed between the second encapsulation plate 8 and the bottom wall of the first substrate 2, the first photonic crystal 4 and the first black substance 5 can move under the influence of the electric field.

[0034] In a specific embodiment, the first photonic crystal 4 is an artificial periodic dielectric structure with photonic bandgap properties. This structure prohibits the propagation of light within a specific frequency range, causing light to be reflected or scattered in specific directions, thereby producing structural color. When the first photonic crystals 4 are arranged in an orderly manner, they have strong reflectivity and can achieve color display by reflecting natural light. When they are aggregated, they no longer reflect, allowing light to pass directly through the material itself, achieving transparent display.

[0035] In a specific embodiment, after light passes through the second packaging substrate and is irradiated on the first photonic crystal 4, an optical bandgap structure is generated due to the periodic change of the refractive index index of the light. If the energy of the electromagnetic wave falls into the bandgap, it cannot continue to propagate and is selectively reflected. When the reflected electromagnetic wave is equivalent to the wavelength range of visible light, a color visible to the naked eye is generated, and its structural color has the advantages of high color saturation, high brightness, and no photobleaching.

[0036] In a specific embodiment, because the first photonic crystal 4 has both excellent color rendering and reflection properties, when the first photonic crystal 4 is applied to the display panel 100, no additional filter or reflective layer structure is required. Therefore, the display panel 100 of the present invention does not require the addition of a filter or reflective layer structure, thereby having the advantages of being thinner and lighter than other display structures.

[0037] In a specific embodiment, the first photonic crystal 4 exhibits an iridescent effect due to its color rendering properties. When used for display, its displayed color easily changes with viewing angle. Therefore, a single first photonic crystal 4 can affect the display effect, resulting in a decrease in display quality. Therefore, the present invention also incorporates a first black material 5 within the first pixel space 3. The first black material 5 absorbs excess scattered light, effectively reducing angle dependence and improving display contrast.

[0038] In a specific embodiment, the first black substance 5 is conductive and can move within the electric field between the second encapsulation plate 8 and the bottom wall of the first substrate 2 (i.e., within the first pixel space 3). By controlling the presence and strength of the electric field, the movement of the first black substance 5 can be controlled to absorb stray light refracted from the first photonic crystal 4. The first black substance 5 can also be used to block or expose the bottom wall of the first pixel space 3, thereby rendering the display panel 100 opaque or transparent.

[0039] In a specific embodiment, when no electric field is applied, the first black substance 5 can be adsorbed on the sidewalls of the first pixel space 3 by electrostatic attraction or van der Waals force. The first photonic crystals 4 are aggregated together, so that the first black substance 5 does not affect the transmission of light from the bottom wall of the first pixel space 3.

[0040] In a specific embodiment, the first black substance 5 has strong light absorption properties, effectively absorbing light randomly scattered within the first photonic crystal 4. This reduces the interference of multi-angle reflected light caused by the periodic structure, ultimately resulting in a more saturated structural color and a reduced iridescence effect. The first black substance 5 is highly conductive. Adding the first black substance 5 to the first pixel space 3 can simultaneously improve the first photonic crystal 4's response to electric fields and color saturation.

[0041] In a specific embodiment, when the display panel 100 is in the display state, an electric field is formed between the second encapsulation board 8 and the bottom wall of the first substrate 2. Under the action of the electric field, the first photonic crystal 4 and a portion of the first black substance 5 move to a position close to the second encapsulation board 8 and are evenly dispersed in the first dispersion medium 6. A portion of the first black substance 5 is also adsorbed on the bottom wall of the first pixel space 3. When light enters the first pixel space 3, light of a specific color is reflected by the first photonic crystal 4 and emitted from the second encapsulation board 8, forming a display image. Unreflected light is refracted by the first photonic crystal 4 and absorbed by the first black substance 5.

[0042] In a specific embodiment, when the display panel 100 is in a transparent state, no electric field is formed between the second encapsulation board 8 and the bottom wall of the first substrate 2. The first photonic crystals 4 are concentrated in the first dispersion medium 6 and located specifically at the bottom wall of the first pixel space 3. The first black substance 5 is adsorbed on the sidewalls of the first pixel space 3. When light enters the first pixel space 3, it is refracted by the concentrated first photonic crystals 4. The first black substance 5 does not affect the transmission of light at the bottom wall of the first pixel space 3. The light sequentially transmits through the first substrate 2, the first array substrate 1, and the first encapsulation board 7, resulting in the display panel 100 being transparent.

[0043] The present invention provides a display panel 100 with high full-color display and high transparency display effects. By adding a first photonic crystal 4 to a first pixel space 3, in the display state, the first photonic crystal 4 is uniformly dispersed in a first dispersion medium 6. The color reflection characteristics of the first photonic crystal 4 are utilized to enable light to be reflected on the first photonic crystal 4 to form a display screen. In the transparent state, the concentrated first photonic crystals 4 can transmit light due to their isotropic properties, so that the display panel 100 can be transparent. In addition, by adding a first black substance 5 to the first pixel space 3, in the display state, the first black substance 5 adsorbed on the bottom wall of the first pixel space 3 can absorb stray light transmitted through the first photonic crystal 4, thereby greatly improving the full color during display. In the transparent state, the first black substance 5 is adsorbed on the side wall of the first pixel space 3, and the first black substance 5 will not affect the light transmitted through the first photonic crystal 4, thereby improving transparency.

[0044] In some implementations, please refer to Figure 3 The first pixel spaces 3 are multiple, independent of each other, and arranged in multiple rows and columns. Specifically, the first substrate 2 may have a checkerboard-like structure when viewed from above, with the multiple first pixel spaces 3 arranged in an array. Each first pixel space 3 is filled with a first photonic crystal 4, a first black substance 5, and a first dispersion medium 6.

[0045] In a specific embodiment, one first pixel space 3 and the first photonic crystal 4, first black substance 5, and first dispersion medium 6 therein together constitute a pixel unit, so multiple first pixel spaces 3 and the injected substances therein together constitute multiple pixel units on the display panel 100. The multiple pixel units reflect light of different colors and combine with each other, so that the display panel 100 can display images.

[0046] In some implementations, please refer to Figure 3The first substrate 2 includes three different types of first photonic crystals 4: photonic crystal 1 14, photonic crystal 2 15, and photonic crystal 3 16. The three different first photonic crystals 4 are photonic crystal 1 14, photonic crystal 2 15, and photonic crystal 3 16 of different sizes (particle diameters). When evenly distributed, light reflected from these first photonic crystals reflects wavelengths corresponding to red, green, and blue, thereby achieving color display.

[0047] In the specific embodiment, please refer to Figure 3 , along the first direction, three adjacent first pixel spaces 3 are provided on the first substrate 2, namely pixel space one 9, pixel space two 10 and pixel space three 11. The first direction is perpendicular to the thickness direction of the display panel 100. Among them, photonic crystal one 14 is injected into pixel space one 9, photonic crystal two 15 is injected into pixel space two 10, and photonic crystal three 16 is injected into pixel space three 11. Photonic crystal one 14 can be used to reflect red light, photonic crystal two 15 can be used to reflect green light, and photonic crystal three 16 can be used to reflect blue light. The first black substance 5 and the first dispersion medium 6 in the three adjacent first pixel spaces 3 can be the same. In this way, three adjacent pixel units can together constitute a pixel point.

[0048] In a specific embodiment, if the voltage between the second packaging plate 8 and the bottom wall of the first substrate 2 is continuously increased, the uniformly dispersed first photonic crystals 4 will converge in one direction. As the aggregation increases, the reflective ability of the first photonic crystals 4 gradually weakens, eventually becoming completely non-reflective. Therefore, the distribution of the first photonic crystals 4 with three different reflective colors can be controlled separately through the electric field, thereby achieving the goal of color rendering.

[0049] The present invention achieves the separation of multiple photonic crystals by creating multiple independent first pixel spaces 3 on the first substrate 2, without affecting each other. At the same time, since each photonic crystal is individually encapsulated, direct contact between the first dispersion medium 6 in the material and the sealant is avoided. The first substrate 2 is made of a stable material with strong chemical stability and is insoluble in water and organic solvents. Therefore, it cannot dissolve in the first dispersion medium 6, ensuring the reliability of the package and the stability of the material.

[0050] In some embodiments, all first photonic crystals 4 within the first substrate 2 have the same specifications, i.e., the entire display panel 100 utilizes first photonic crystals 4 of uniform specifications. The electric field strengths applied to the multiple first pixel spaces 3 vary, and this difference in electric field strength affects the arrangement of the first photonic crystals 4. As the electric field strength increases, the wavelength reflected by the first photonic crystals 4 gradually shifts to the blue.

[0051] In a specific embodiment, three adjacent first pixel spaces 3 are defined on the first substrate 2 along the first direction: pixel space one 9, pixel space two 10, and pixel space three 11. The electric field intensity in pixel space one 9 is the lowest, the electric field intensity in pixel space two 10 is the second highest, and the electric field intensity in pixel space three 11 is the highest. This allows the three adjacent pixel units to reflect different light rays and together form a pixel. The first photonic crystal 4, first black substance 5, and first dispersion medium 6 in the three adjacent first pixel spaces 3 can be identical.

[0052] In some embodiments, the first photonic crystal 4 includes one or more of silicon dioxide, polystyrene, polymethyl methacrylate, and silicon nitride. These materials inherently have a certain degree of light transmittance. Therefore, when the first photonic crystal 4 does not reflect light, light passes through the material itself, presenting a transparent state, laying the foundation for the realization of a transparent display panel 100.

[0053] In some embodiments, the first dispersion medium 6 includes one or more of propylene carbonate, polyethylene glycol, formanilide, diethylene glycol ethyl ether acrylate, polychlorinated biphenyls, ethanol, ether, acetone, and toluene. The first dispersion medium 6 does not react with the first photonic crystal 4 and the first black substance 5, meaning that both can stably exist in the first dispersion medium 6. Furthermore, the materials are light-transmitting and can transmit light.

[0054] In some embodiments, the first black substance 5 comprises one or more of carbon black, graphene, carbon nanotubes, graphite, ruthenium dioxide, and black tin oxide. This first black substance 5 not only has strong light absorption properties, effectively absorbing light scattered randomly within the first photonic crystal 4, but also exhibits excellent electrical conductivity, enabling its movement to be influenced by controlling the electric field strength.

[0055] In some implementations, please refer to Figure 2 The first black substance 5 includes a first black sub-substance 17 and a second black sub-substance 18, and the first black sub-substance 17 and the second black sub-substance 18 have different charges; in the display state, the first black sub-substance 17 is uniformly dispersed in the first dispersion medium 6, and the second black sub-substance 18 is adsorbed on the bottom wall of the first pixel space 3.

[0056] In a specific embodiment, two different types of first black material 5 are injected into the first pixel space 3: a first black sub-matter 17 and a second black sub-matter 18. The materials of the first black material 5 described in the above embodiments can be similar to those of the first black material 5 described in the above embodiments. The first and second black sub-matter 17, 18 have the same charge (same polarity), but different amounts of charge. In the absence of an applied electric field, both the first and second black sub-matter 17, 18 can be attracted to the sidewalls of the first pixel space 3 via electrostatic attraction or van der Waals forces.

[0057] In a specific embodiment, the second black sub-matter 18 can carry a higher charge, while the first black sub-matter 17 has a lower charge. Therefore, the second black sub-matter 18 is more sensitive to changes in the electric field. When an electric field is applied to the first pixel space 3 (in the display state), the second black sub-matter 18 can move from the sidewalls of the first pixel space 3 to the bottom wall of the first pixel space 3, where it is evenly distributed. Because the first black sub-matter 17 carries a lower charge, the attraction of the surrounding sidewalls of the first pixel space 3 on the first black sub-matter 17 is offset by the attraction of the electric field. As a result, the first black sub-matter 17 no longer clings to the surrounding sidewalls. Simultaneously, influenced by the attraction between the dispersed first photonic crystals 4, the first black sub-matter 17 is evenly dispersed among the materials of the first photonic crystals 4, thereby enhancing the display effect.

[0058] In some implementations, please refer to Figure 4 The display panel 100 also includes a non-transparent state. In the non-transparent state, the first photonic crystal 4 is aggregated in the first dispersion medium 6, the first black sub-substance 17 is adsorbed on the side wall of the first pixel space 3, and the second black sub-substance 18 is adsorbed on the bottom wall of the first pixel space 3.

[0059] In a specific embodiment, the non-transparent state refers to the display panel 100 being non-transparent even when not in use. When a weak electric field is applied to the first pixel spaces 3 (display state), the second black sub-substance 18 can move from the sidewalls of the first pixel spaces 3 to the bottom wall of the first pixel spaces 3, becoming evenly distributed along the bottom wall. However, the weak electric field is insufficient to offset the attraction of the first black sub-substance 17 to the surrounding sidewalls of the first pixel spaces 3. Furthermore, due to the relatively weak electric field, the first photonic crystal 4 remains unchanged, resulting in only the second black sub-substance 18 adsorbed to the bottom wall of the first pixel spaces 3. Light entering the first pixel spaces 3 transmits through the first photonic crystal 4 and is absorbed by the second black sub-substance 18.

[0060] In specific embodiments, the display panel 100 comprises a transparent state, a non-transparent state and a display state. In the transparent state, the first black sub-particles 17 and the second black sub-particles 18 are both adsorbed on the side walls of the first pixel space 3, and the first photonic crystal 4 is gathered in the first dispersion medium 6 and can be located at the bottom wall of the first pixel space 3. In the non-transparent state, the first black sub-particles 17 are adsorbed on the side walls of the first pixel space 3, the second black sub-particles 18 are adsorbed on the bottom wall of the first pixel space 3, and the first photonic crystal 4 is gathered in the first dispersion medium 6 and can be located at the bottom wall of the first pixel space 3. In the display state, the first photonic crystal 4 and the first black sub-particles 17 are uniformly dispersed in the first dispersion medium 6, and the second black sub-particles 18 are adsorbed on the bottom wall of the first pixel space 3.

[0061] In specific embodiments, the display panel 100 can be converted from the transparent state to the display state by continuously increasing the electric field in the first pixel space 3. The second black sub-particles 18 will always be distributed at the bottom of the first pixel space 3, and when increased to a sufficient extent, the first photonic crystal 4 will be uniformly dispersed in the first pixel space 3, while the first black sub-particles 17 will not be adsorbed on the surrounding walls due to the influence of the electric field, and the first black sub-particles 17 will be uniformly dispersed between the first photonic crystal 4 materials due to the influence of the attractive force between the dispersed first photonic crystal 4, thereby achieving the purpose of enhancing the display effect. It should be noted that the applied electric field should not be too large. When the influence of the applied electric field on the first black sub-particles 17 is greater than that of the photonic crystal, the first black sub-particles 17 will be distributed at the bottom together with the second black sub-particles 18, thereby failing to achieve the enhancement of the display effect.

[0062] The present application adds the first black sub-particles 17 and the second black sub-particles 18 to the first pixel space 3 in combination, and the second black sub-particles 18 will be more sensitive to changes in the electric field. When a weak electric field is applied, the second black sub-particles 18 will be uniformly distributed along the bottom of the first pixel space 3, and the first black sub-particles 17 will not change their distribution state due to the weak electric field because they have a smaller amount of charge. Therefore, the first photonic crystal 4 will also remain unchanged when the electric field is relatively weak. In this state, even if the first photonic crystal 4 cannot reflect light, the pixel unit cannot achieve transparent display, and mutual interference of double-sided light can be effectively avoided during double-sided display.

[0063] In one embodiment, please refer to Figure 5-Figure 7The present invention also provides another black material combination. The first black material 5 includes a first black sub-material 17 and a second black sub-material 18. The first black sub-material 17 and the second black sub-material 18 have different charge polarities. In the display state, the first black sub-material 17 is uniformly dispersed in the first dispersion medium 6, and the second black sub-material 18 is adsorbed on the bottom wall of the first pixel space 3.

[0064] In a specific embodiment, different from the above embodiment, the first black sub-substance 17 and the second black sub-substance 18 can also be materials of different polarities. For example, the first black sub-substance 17 has a negative charge, and the second black sub-substance 18 has a positive charge. The charges of the first black sub-substance 17 and the second black sub-substance 18 can be the same or different.

[0065] In a specific embodiment, the display panel 100 further includes a first electrode 19 and a second electrode 20. The first electrode 19 and the second electrode 20 are disposed on the sidewalls of the first pixel space 3. The first electrode 19 and the second electrode 20 are respectively disposed on opposite sidewalls of the first pixel space 3. That is, the first electrode 19 and the second electrode 20 are disposed opposite each other and separated by a distance. Optionally, the first electrode 19 and the second electrode 20 may be made of ITO (indium tin oxide). It is understood that the first electrode 19 and the second electrode 20 can be made of the same material and can be completely identical (thickness, etc.). The first electrode 19 and the second electrode 20 are distinguished only when an electric field is applied to them.

[0066] In a specific embodiment, in the transparent state, a positive charge is applied to the first electrode 19 and a negative charge is applied to the second electrode 20, forming an electric field between the two. Since the first black sub-substance 17 and the second black sub-substance 18 have different charges, the first black sub-substance 17 is adsorbed at the positive electrode, and the second black sub-substance 18 is adsorbed at the negative electrode. The first photonic crystal 4 can also be affected by the positive electrode, and the first photonic crystal 4 is concentrated at the positive electrode. Due to the concentration of the first photonic crystal 4, the incident light can pass through the first pixel space 3 and the first photonic crystal 4, thereby achieving a transparent display.

[0067] In a specific embodiment, in the non-transparent state, a positive (or negative) charge is applied to both the first electrode 19 and the second electrode 20, while a negative (or positive) charge is applied to the bottom wall of the first pixel space 3. The positively charged second black sub-substance 18 is adsorbed to the bottom wall of the first pixel space 3, and the first black sub-substance 17 is adsorbed to the side walls of the first pixel space 3 (i.e., the first and second electrodes 19 and 20). Due to the change in the electric field, the arrangement of the first photonic crystal 4 also changes accordingly, resulting in a stacking of the first and second electrodes 19 and 20. Due to the arrangement of the photonic crystals, light entering the first pixel space 3 transmits through the first photonic crystal 4 and is absorbed by the second black sub-substance 18. In this state, interference between light on both sides of the display is effectively avoided during double-sided display.

[0068] In a specific embodiment, in the display state, neither the first electrode 19 nor the second electrode 20 provides an electric field. A negative (or positive) charge can be applied to the bottom wall of the first pixel space 3, and a positive (or negative) charge can be applied to the second packaging board 8. This creates an electric field between the bottom wall of the first pixel space 3 and the second packaging board 8. The first black sub-substance 17 falls off the sidewall and mixes with the first photonic crystal 4. The first photonic crystal 4 and the first black sub-substance 17 are evenly dispersed in the first dispersion medium 6, while the second black sub-substance 18 is adsorbed on the bottom wall of the first pixel space 3.

[0069] In some implementations, please refer to Figure 8 The first substrate 2 includes a support body 12 and a stabilizing layer 13. The support body 12 is provided with a first pixel space 3, and the stabilizing layer 13 covers the inner wall of the first pixel space 3. Specifically, the first substrate 2 is composed of two different materials, namely the support body 12 and the stabilizing layer 13. The support body 12 can be a polymer, and the stabilizing layer 13 can be an inorganic material. The stabilizing layer 13 does not react with the first dispersion medium 6.

[0070] In some embodiments, the support body 12 comprises one or more of positive photoresist and negative photoresist. These materials inherently have a certain degree of light transmittance, so that after light passes through the first photonic crystal 4, it can enter the support body 12 and exit, thereby transmitting into the first packaging plate 7. Polystyrene can be selected.

[0071] In some embodiments, the stabilizing layer 13 includes one or more of silicon carbide and silicon oxide. These materials themselves have a certain degree of light transmittance, so when light passes through the first photonic crystal 4, it can be injected into the stabilizing layer 13 and emitted into the supporting body 12.

[0072] In the prior art, traditional transparent electronic paper display devices are easily affected by light from both the front and back sides during display due to their transparency. Therefore, traditional transparent electronic paper display devices cannot directly achieve double-sided display. If you want to achieve double-sided display on the original transparent electronic paper display device, you need to avoid the interference of light from both sides. If it is possible to switch between transparent display and double-sided display of electronic paper, the application range of transparent electronic paper display devices can be effectively expanded, and users can be given a more extreme experience. Therefore, based on the above embodiment, the present invention also provides a display panel 100 capable of double-sided display.

[0073] In one embodiment, please refer to Figure 9 and Figure 10 The display panel 100 also includes a second array substrate 21 and a second base 22. The second array substrate 21 is arranged on the side of the first array substrate 1 facing away from the first base 2; the second base 22 is arranged on the side of the second array substrate 21 facing away from the first array substrate 1, and the second base 22 is provided with a second pixel space 23. The second pixel space 23 contains a second photonic crystal 24, a second black substance 25 and a second dispersion medium 26; wherein the second array substrate 21, the second base 22, the second photonic crystal 24 and the second dispersion medium 26 are all capable of transmitting light; in a transparent state, the second photonic crystal 24 is deposited and aggregated in the first dispersion medium 6, and the second black substance 25 is adsorbed on the side wall of the second pixel space 23.

[0074] In the specific embodiment, please refer to Figure 9 and Figure 10 The second array substrate 21 is connected to the first packaging board 7 and is disposed on the side of the first packaging board 7 facing away from the first array substrate 1. The display panel 100 also includes a third packaging board 31. The third packaging board 31 is identical to the first packaging board 7 and the second packaging board 8, i.e., the third packaging board 31 is also light-transmissive. The third packaging board 31 is disposed on the side of the second base 22 facing away from the second array substrate 21.

[0075] In a specific embodiment, the third packaging board 31, the second substrate 22, the second array substrate 21, the first packaging board 7, the first array substrate 1, the first substrate 2, and the second packaging board 8 are stacked in sequence. The second substrate 22 forms the second pixel space 23 from the side facing away from the second array substrate 21, that is, the opening of the second pixel space 23 faces the third packaging board 31. The third packaging board 31 is used to close the opening of the second pixel space 23.

[0076] In a specific embodiment, the display panel 100 includes a first display area 27 and a second display area 28. The first display area 27 includes a first array substrate 1, a first base 2, and a second encapsulation board 8, as well as a first photonic crystal 4, a first black substance 5, and a first dispersion medium 6 in a first pixel space 3. The second display area 28 includes a second array substrate 21, a second base 22, and a third encapsulation board 31, as well as a second photonic crystal 24, a second black substance 25, and a second dispersion medium 26 in a second pixel space 23. External light can penetrate the third encapsulation board 31 and illuminate the second pixel space 23. Of course, light can also penetrate through the first display area 27 into the second display area 28 and be emitted from the second display area 28, thereby achieving the transparent and double-sided display effect of the display panel 100.

[0077] In a specific embodiment, the second photonic crystal 24 and the first photonic crystal 4 are made of the same material, and the second photonic crystal 24 is arranged in the second display area 28 in the same manner as the first photonic crystal 4 is arranged in the first display area 27, that is, the reflection principle of the second photonic crystal 24 for specific light may be different in size or different in voltage.

[0078] In a specific embodiment, the second black substance 25 and the first black substance 5 are made of the same material. Of course, the second black substance 25 may include a third black sub-substance 29 and a fourth black sub-substance 30, and the third black sub-substance 29 and the fourth black sub-substance 30 have different charges. The second dispersion medium 26 and the first dispersion medium 6 are made of the same material.

[0079] In one embodiment, please refer to Figure 9 and Figure 10 Based on the double-sided display effect of the display panel 100, the display panel 100 can include a transparent state, a non-transparent state, a single-sided display state, and a double-sided display state. The transparent state means that both the first display area 27 and the second display are transparent, and the transparent display method can refer to the above embodiment. The non-transparent state means that both the first display area 27 and the second display are non-transparent, and the non-transparent display method can refer to the above embodiment.

[0080] In a specific embodiment, the single-sided display state refers to either the first display area 27 or the second display area displaying an image. Taking the first display area 27 displaying an image as an example, the first display area 27 displaying an image can refer to the above-described embodiments, and the second display area 28 can be transparent or non-transparent (referring to the transparent or non-transparent states described above). Optionally, when the first display area 27 displays an image, the second display area 28 can be non-transparent. Specifically, the third black sub-substance 29 is attached to the sidewalls of the second pixel space 23, and the fourth black sub-substance 30 is attached to the bottom wall of the second pixel space 23. This further absorbs light transmitted from the first display area 27, resulting in a more saturated color displayed in the first display area 27.

[0081] In a specific embodiment, when an electric field is applied, the first black sub-matter 17 (or third black sub-matter 29) is evenly distributed throughout the photonic crystal, resulting in a short-range ordered and overall disordered arrangement. This effectively reduces its structural dependence and enhances the display quality. The second black sub-matter 18 (or fourth black sub-matter 30) is evenly distributed on the bottom side, further increasing display contrast. For pixel units or display areas not requiring display, in the absence of an applied electric field, both black materials are evenly distributed along the surrounding walls, while the photonic crystal is concentrated at the bottom, preventing it from reflecting light. Due to the inherent transparency of the photonic crystal, single-sided or transparent display is achieved.

[0082] In a specific embodiment, the double-sided display state means that both the first display area 27 and the second display area display images. The first black sub-substance 17 is evenly dispersed in the first dispersion medium 6, the second black sub-substance 18 is adsorbed on the bottom wall of the first pixel space 3, and the first photonic crystals 4 are evenly dispersed in the first dispersion medium 6. The third black sub-substance 29 is evenly dispersed in the second dispersion medium 26, the fourth black sub-substance 30 is adsorbed on the bottom wall of the second pixel space 23, and the second photonic crystals 24 are evenly dispersed in the second dispersion medium 26.

[0083] In a specific embodiment, during double-sided display, the array substrate can apply an extremely low electric field to pixel units not required for display. The second black sub-matter 18 (or fourth black sub-matter 30) adheres to the bottom wall of the pixel space, rendering the individual pixel units not required for display non-transparent and preventing light from passing through and affecting the display area on the back. The first black sub-matter 17 (or third black sub-matter 29) is unaffected by the low electric field and remains in the same state as when no display is required. Furthermore, because the bottom and side walls of the pixel spaces on both sides each have a layer of black material to absorb unreflected light, interference between the display light from both sides can be effectively prevented. This allows for double-sided display while maintaining the display quality of the display panel 100.

[0084] The application can improve the response speed of the material to the electric field and the color saturation by introducing the first black substance 5 in the first pixel space 3 and the second black substance 25 in the second pixel space 23; the transparent display can be realized by controlling the electric field when no color is displayed. Meanwhile, the application can realize the mode switching between the transparent display and the double-sided display of the electronic paper by further designing the display structure and regulating the first black substance 5 and the second black substance 25, and the structure is simple and easy to implement.

[0085] The manufacturing method of the display panel In an embodiment, the application further provides a manufacturing method of a display panel, referring to Figure 11 and Figure 12 The manufacturing method of the display panel is used for manufacturing the display panel provided in the above embodiments, and the manufacturing method comprises the following steps: Step S100, a first base is arranged on a first array substrate, and a first pixel space is opened on the first base to obtain the first base with the first pixel space.

[0086] Step S200, the first photonic crystal, the first black substance and the first dispersion medium are injected into the first pixel space, and the first base is encapsulated to obtain the display panel.

[0087] In specific embodiments, referring to Figure 13 The material of the first base can be silicon carbide in the above embodiments, and the step S100 of arranging the first base on the first array substrate comprises: Step S101, after the first array substrate with completed array process is cleaned, the first base is prepared by chemical vapor deposition (CVD).

[0088] In specific embodiments, referring to Figure 13 The method of opening the first pixel space can be photolithography, and the step S100 of opening the first pixel space on the first base comprises: Step S102, a layer of photoresist material is coated on the first base, and then the area to be etched is left after the photoresist material is sequentially subjected to vacuum drying, pre-baking shaping, exposure, development and curing process, and the etched area corresponds to the first pixel space.

[0089] Step S103, the first base is selectively etched by plasma, and the etching is waited to be completed; the plasma includes a mixed gas composed of CF4, CHF3, SF6 and oxygen.

[0090] In step S104 , the remaining photoresist material is removed using a photoresist remover, and then the first substrate is cleaned again to remove the photoresist remover, etching solution and residues, thereby finally obtaining a first substrate having a first pixel space.

[0091] In the specific embodiment, please refer to Figure 13 When the first black sub-material and the second black sub-material have different charges, electrodes need to be fabricated in the first pixel space, including: Step S105 , forming a first electrode and a second electrode on opposite side walls of the first pixel space. The first electrode and the second electrode may be made of the same material, i.e., ITO.

[0092] In the specific embodiment, please refer to Figure 13 The first photonic crystal includes silicon dioxide, and the first dispersion medium includes propylene carbonate. In step S200, the first photonic crystal, the first black substance, and the first dispersion medium are injected into the first pixel space, including: In step S201 , a mixture of the uniformly distributed first photonic crystal, the first black substance and the first dispersion medium is sequentially added into the first pixel space by inkjet printing technology according to the structural color classification of the photonic crystal.

[0093] In the specific embodiment, please refer to Figure 13 The display panel further includes a second packaging plate. In step S200, packaging the first substrate includes: Step S202 : Under a vacuum environment, the first substrate is laminated and packaged with a second packaging plate coated with sealant, and then subjected to light curing and thermal curing to obtain a display panel.

[0094] The present invention provides a first pixel space on the first substrate, so that each first pixel space becomes an independent pixel unit. The first substrate and the second packaging plate are packaged, which can effectively prevent the sealant from directly contacting the material and solve the problem of the sealant dissolving in the first dispersion medium. At the same time, the above-mentioned production method is simpler and can effectively reduce costs. The produced first substrate structure can be applied to various new materials that are soluble in the sealant, or can also be used for new materials that need to be separately packaged.

[0095] In one embodiment, the present invention also provides a method for manufacturing a double-sided display panel, please refer to Figure 14 The manufacturing method of the display panel is used to manufacture the double-sided display panel provided in the above embodiment, and the manufacturing method includes the following steps: Step S1 : After cleaning the first array substrate after the array process is completed, the array process is performed again on the back side of the first packaging board to obtain a second array substrate on the back side of the first packaging board.

[0096] Step S2 : After cleaning the first array substrate after the array process, a first base having a first pixel space is manufactured on the first array substrate by chemical vapor deposition technology and photolithography technology.

[0097] Step S3 , after cleaning the second array substrate after the array process is completed, a second base having a second pixel space is manufactured on the second array substrate by chemical vapor deposition technology and photolithography technology.

[0098] In step S4 , the prepared mixture of the first photonic crystal, the first black substance and the first dispersion medium is added to the first pixel space by inkjet printing technology according to the structural color classification of the photonic crystal, and the first substrate is encapsulated.

[0099] In step S5, the mixture of the configured second photonic crystal, the second black substance and the second dispersion medium is classified according to the structural color of the photonic crystal, added to the second pixel space by inkjet printing technology, and the second substrate is packaged to obtain a display panel capable of double-sided display.

[0100] In some implementations, please refer to Figure 15 The first base includes a supporting body and a stabilizing layer. The first substrate is arranged on the first array substrate, and a first pixel space is opened on the first substrate, including: arranging a supporting body on the first array substrate, and opening a first pixel space on the supporting body; depositing a stabilizing material on the inner wall of the first pixel space, the stabilizing material forming a stabilizing layer and covering the inner wall of the first pixel space.

[0101] In a specific embodiment, a method for manufacturing a display panel having a support body and a stabilizing layer includes the following steps: In step S11 , after cleaning the first array substrate that has completed the array process, a layer of photoresist material is coated on the first array substrate, and then vacuum dried and pre-baked to obtain a support body.

[0102] Step S12: opening first pixel spaces on the supporting body through exposure, development and curing processes, so that each first pixel space is individually separated and the sidewalls of the first pixel spaces have a gradient.

[0103] In step S13 , a stabilizing material is deposited on a side of the support body facing away from the first array substrate by chemical vapor deposition (CVD), and the stabilizing material covers the inner wall of the first pixel space to form a stabilizing layer.

[0104] In step S14 , the prepared mixed solution of the uniformly distributed first photonic crystal, the first black substance and the first dispersion medium is sequentially added into the first pixel space by inkjet printing technology according to the structural color classification of the photonic crystal.

[0105] Step S15 , in a vacuum environment, the first substrate is bonded and packaged with the second packaging plate coated with sealant, and then subjected to light curing and thermal curing to obtain a display panel.

[0106] The present invention manufactures the first substrate by combining a polymer support body and a highly stable stabilizing layer, which can replace the solution of using only stable materials to manufacture the substrate, thereby reducing the difficulty of manufacturing the first substrate. In addition, this type of structure has higher universality. By preparing a support body with the required height and gradient and then coating it with a stabilizing layer, the problem of process limitations can be effectively solved, which not only reduces the production cost, but also the support body and the stabilizing layer will not affect the display effect.

[0107] The display panel produced using the aforementioned embodiments of the present invention utilizes photonic crystals and black matter within the display panel, simplifying the manufacturing process for transparent and double-sided displays while significantly reducing production costs and avoiding more complex, difficult, and costly solutions. Furthermore, the novel display structure and process design are also applicable to other display materials requiring encapsulation, demonstrating high universality. Furthermore, its overall thickness is thinner and weight is lighter, significantly enhancing its competitive advantage in the transparent display field.

[0108] Electronic paper In some embodiments, the present invention further provides an electronic paper, which includes the display panel provided in the above embodiment; or, the electronic paper includes the display panel manufactured by the method for manufacturing the display panel provided in the above embodiment.

[0109] The electronic paper provided by this invention overcomes the limitations of existing electronic paper architectures and offers a new direction for improvement and innovation in the field of transparent displays. Furthermore, the new electronic paper design not only achieves transparent display but also, due to the bright structural color properties of photonic crystals, enables brighter, more saturated full-color displays.

[0110] Furthermore, based on the excellent reflective and color rendering properties of photonic crystals, the designed structure is simpler and thinner than traditional e-paper, and the manufacturing process is also simpler. This can significantly reduce production costs while ensuring high-quality transparent display.

[0111] Furthermore, the e-paper can be switched to display on both sides. This not only enables full-color display but also significantly improves response speed. When used in a dual-sided display mode, it not only provides full-color display but also prevents light interference from both sides, resulting in a higher-quality display.

[0112] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the drawings, and are only used to facilitate the description of the present application 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 understood as a limitation on the present application.

[0113] It should be noted that the definition of each step involved in the present scheme does not limit the order of the steps without affecting the implementation of the specific scheme, and the steps written in the front can be executed in advance, or executed later, or even executed simultaneously, as long as the scheme can be implemented, it should be considered to belong to the protection scope of the present application.

[0114] The above only discloses a preferred embodiment of the present application, of course, cannot limit the scope of the right of the present application, the person skilled in the art can understand that the whole or part of the above-mentioned embodiment is implemented, and the equivalent change made according to the claim of the present application still belongs to the scope covered by the present application.

Claims

1. A display panel, characterized in that: include: a first array substrate; A first substrate is provided on the first array substrate, wherein the first substrate is provided with a first pixel space, and the first pixel space contains a first photonic crystal, a first black substance, and a first dispersion medium; Wherein, the first array substrate, the first base, the first photonic crystal and the first dispersion medium are all capable of transmitting light; The display panel includes a display state and a transparent state. In the display state, the first photonic crystals are uniformly dispersed in the first dispersion medium, and at least part of the first black substance is adsorbed on the bottom wall of the first pixel space; in the transparent state, the first photonic crystals are aggregated in the first dispersion medium, and the first black substance is adsorbed on the side wall of the first pixel space.

2. The display panel according to claim 1, wherein: The first photonic crystal comprises one or more of silicon dioxide, polystyrene, polymethyl methacrylate, and silicon nitride; and / or The first dispersion medium comprises one or more of propylene carbonate, polyethylene glycol, formanilide, diethylene glycol ethyl ether acrylate, polychlorinated biphenyls, ethanol, ether, acetone, and toluene; and / or The first black substance includes one or more of carbon black, graphene, carbon nanotubes, graphite, ruthenium dioxide, and black tin oxide.

3. The display panel according to claim 1, wherein: The first black substance includes a first black sub-substance and a second black sub-substance, and the first black sub-substance and the second black sub-substance have different charges; in the display state, the first black sub-substance is uniformly dispersed in the first dispersion medium, and the second black sub-substance is adsorbed on the bottom wall of the first pixel space.

4. The display panel according to claim 3, wherein: The display panel also includes a non-transparent state. In the non-transparent state, the first photonic crystals are aggregated in the first dispersion medium, the first black sub-substance is adsorbed on the side walls of the first pixel space, and the second black sub-substance is adsorbed on the bottom wall of the first pixel space.

5. The display panel according to claim 1, wherein: The first substrate includes a supporting body and a stabilizing layer. The supporting body is provided with the first pixel space. The stabilizing layer covers the inner wall of the first pixel space.

6. The display panel according to claim 5, wherein: The supporting body includes one or more of positive photoresist and negative photoresist; and / or The stabilization layer includes one or more of silicon carbide and silicon oxide.

7. The display panel according to any one of claims 1 to 6, characterized in that: The display panel further includes: a second array substrate, disposed on a side of the first array substrate facing away from the first base; a second substrate, disposed on a side of the second array substrate facing away from the first array substrate, the second substrate being provided with a second pixel space, wherein the second pixel space contains a second photonic crystal, a second black substance, and a second dispersion medium; Wherein, the second array substrate, the second base, the second photonic crystal and the second dispersion medium are all capable of transmitting light; In the transparent state, the second photonic crystals are deposited and aggregated in the first dispersion medium, and the second black substance is adsorbed on the sidewall of the second pixel space.

8. A method for manufacturing a display panel, characterized in that: The method for manufacturing the display panel is used to manufacture the display panel according to any one of claims 1 to 7, and the method comprises: Arranging a first substrate on the first array substrate, and opening a first pixel space on the first substrate to obtain a first substrate having the first pixel space; A first photonic crystal, a first black substance, and a first dispersion medium are injected into the first pixel space, and the first substrate is packaged to obtain the display panel.

9. The method for manufacturing a display panel according to claim 8, wherein: The first substrate is disposed on the first array substrate, and the first pixel space is formed on the first substrate, including: Disposing a supporting body on the first array substrate, and defining the first pixel space on the supporting body; A stabilizing material is deposited on the inner wall of the first pixel space, where the stabilizing material forms a stabilizing layer and covers the inner wall of the first pixel space.

10. An electronic paper, characterized in that: The electronic paper includes the display panel according to any one of claims 1 to 7; or, the electronic paper includes a display panel manufactured by the method for manufacturing a display panel according to claim 8 or 9.

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