Display panel and manufacturing method thereof, electronic paper

Abstract

A display panel, a manufacturing method thereof and electronic paper, the 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; 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 comprises a display state and a transparent state; in the display state, the first photonic crystal is 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 the transparent state, the first photonic crystal is gathered in the first dispersion medium, and the first black substance is adsorbed to the side wall of the first pixel space. The electronic paper using the display panel can have high color display and high transparency.

Description

TECHNICAL FIELD

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

[0002] Electronic paper, also known as digital paper, is an ultra-thin and ultra-light display screen, which is figuratively understood as a display that is as thin, soft and erasable as paper. Electronic paper adopts reflective display and relies on reflected ambient light to display content, and does not actively emit light, thereby providing clear and natural visual effects under various light conditions, similar to reading paper books, and long-time viewing does not easily cause eye fatigue.

[0003] With the progress of electronic paper, users have higher requirements for electronic paper. Transparent electronic paper display devices are a new display technology, which has the advantages of transparency, low power consumption and visibility under sunlight. However, the transparent electronic paper display devices in the prior art still have certain limitations, in particular, the color performance of the transparent electronic paper display devices is relatively limited, it is difficult to realize full-color display, and the transparent effect when no display is required is poor. Therefore, how to improve the full-color display effect of the transparent electronic paper and improve the transparency has become a key problem. SUMMARY

[0004] The purpose of the present application is to provide a display panel, a manufacturing method thereof and electronic paper, which solve the problem of poor full-color display and transparent display effect of electronic paper.

[0005] To achieve the purpose of the present application, the present application provides the following technical solutions:

[0006] In a first aspect, the present application 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, 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 can transmit light; the display panel comprises a display state and a transparent state, in the display state, the first photonic crystal is 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 the transparent state, the first photonic crystal is gathered in the first dispersion medium, and the first black substance is adsorbed to the side wall of the first pixel space.

[0007] In some embodiments, the first photonic crystal comprises one or more of silicon dioxide, polystyrene, polymethyl methacrylate and silicon nitride.

[0008] In some embodiments, the first dispersion medium comprises one or more of propylene carbonate, polyethylene glycol, formanilide, diethylene glycol ethyl ether acrylate, polychlorinated biphenyl, ethanol, diethyl ether, acetone, toluene.

[0009] In some embodiments, the first black substance comprises one or more of carbon black, graphene, carbon nanotube, graphite, ruthenium dioxide, black tin oxide.

[0010] In some embodiments, the first black substance comprises a first black sub-substance and a second black sub-substance, the first black sub-substance and the second black sub-substance have different amounts of electric 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 to the bottom wall of the first pixel space.

[0011] In some embodiments, the display panel further comprises a non-transparent state, in the non-transparent state, the first photonic crystal is aggregated in the first dispersion medium, the first black sub-substance is adsorbed to the side wall of the first pixel space, and the second black sub-substance is adsorbed to the bottom wall of the first pixel space.

[0012] In some embodiments, the first substrate comprises a support body and a stabilizing layer, the support body is provided with the first pixel space, and the stabilizing layer covers the inner wall of the first pixel space.

[0013] In some embodiments, the support body comprises one or more of positive photoresist and negative photoresist.

[0014] In some embodiments, the stabilizing layer comprises one or more of silicon carbide and silicon oxide.

[0015] In some embodiments, the display panel further comprises a second array substrate and a second substrate; the second array substrate is arranged on the side of the first array substrate away from the first substrate; the second substrate is arranged on the side of the second array substrate away from the first array substrate, the second substrate is provided with a second pixel space, and 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 substrate, the second photonic crystal, and the second dispersion medium are all capable of transmitting light; in the transparent state, the second photonic crystal is aggregated in the first dispersion medium, and the second black substance is adsorbed to the side wall of the second pixel space.

[0016] In a second aspect, the present application provides a manufacturing method of a display panel, which is used for manufacturing the display panel according to any one of the embodiments of the first aspect, and the manufacturing method comprises: disposing a first base on a first array substrate, and opening a first pixel space on the first base to obtain a first base with a first pixel space; injecting a first photonic crystal, a first black substance and a first dispersion medium into the first pixel space, and packaging the first base to obtain the display panel.

[0017] In some embodiments, the disposing the first base on the first array substrate and the opening the first pixel space on the first base comprise: disposing a support body on the first array substrate, and opening the first pixel space on the support body; and 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.

[0018] In a third aspect, the present application provides an electronic paper, which comprises the display panel according to any one of the embodiments of the first aspect, or the display panel manufactured by the manufacturing method of the display panel according to any one of the embodiments of the second aspect.

[0019] The present application provides a display panel with high full-color display and high transparent display effect. By adding a first photonic crystal in a first pixel space, in a display state, the first photonic crystal is uniformly dispersed in a first dispersion medium, and the color reflection characteristic of the first photonic crystal is used to reflect light on the first photonic crystal to form a display picture, and in a transparent state, the gathered first photonic crystal can transmit light due to isotropy, so that the display panel can be transparent. By adding a first black substance in the first pixel space, in the display state, the first black substance adsorbed on the bottom wall of the first pixel space can absorb stray light transmitted through the first photonic crystal, thereby greatly improving the full color in the display, and in the transparent state, the first black substance is adsorbed on the side wall of the first pixel space, and the first black substance does not affect the light transmitted through the first photonic crystal, thereby improving the transparency. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0021] Figure 1FIG. 1 is a cross-sectional schematic view of a display panel in a transparent state according to an embodiment;

[0022] Figure 2 FIG. 2 is a cross-sectional schematic view of a display panel in a display state according to an embodiment;

[0023] Figure 3 FIG. 3 is a cross-sectional schematic view of a plurality of pixel units of a display panel according to an embodiment;

[0024] Figure 4 FIG. 4 is a cross-sectional schematic view of a display panel in a non-transparent state according to an embodiment;

[0025] Figure 5 FIG. 5 is a cross-sectional schematic view of a display panel in a transparent state according to another embodiment;

[0026] Figure 6 FIG. 6 is a cross-sectional schematic view of a display panel in a non-transparent state according to another embodiment;

[0027] Figure 7 FIG. 7 is a cross-sectional schematic view of a display panel in a display state according to another embodiment;

[0028] Figure 8 FIG. 8 is a cross-sectional schematic view of a support body and a stabilizing layer included in a first substrate according to another embodiment;

[0029] Figure 9 FIG. 9 is a schematic view of a double-sided display of a display panel according to an embodiment;

[0030] Figure 10 FIG. 10 is a schematic view of another double-sided display of a display panel according to an embodiment;

[0031] Figure 11 FIG. 11 is a process schematic view of a manufacturing method of a display panel according to an embodiment;

[0032] Figure 12 FIG. 12 is a step schematic view of a manufacturing method of a display panel according to an embodiment;

[0033] Figure 13 FIG. 13 is a detailed step schematic view of a manufacturing method of a display panel according to an embodiment;

[0034] Figure 14 FIG. 14 is a detailed step schematic view of a manufacturing method of a double-sided display of a display panel according to an embodiment;

[0035] Figure 15 FIG. 15 is a detailed step schematic view of a manufacturing method of a display panel including a support body and a stabilizing layer according to an embodiment.

[0036] BRIEF DESCRIPTION OF THE DRAWINGS

[0037] 100 - display panel, 1 - first array substrate, 2 - first base, 3 - first pixel space, 4 - first photonic crystal, 5 - first black substance, 6 - first dispersion medium, 7 - first encapsulation plate, 8 - second encapsulation plate, 9 - pixel space one, 10 - pixel space two, 11 - pixel space three, 12 - support body, 13 - stabilizing layer, 14 - photonic crystal one, 15 - photonic crystal two, 16 - photonic crystal three, 17 - first black substance, 18 - second black substance, 19 - first electrode, 20 - second electrode, 21 - second array substrate, 22 - second base, 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 substance, 30 - fourth black substance, 31 - third encapsulation plate. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0039] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be an intervening component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be an intervening component.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0041] Some embodiments of the present application will be described in detail below with reference to the drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0042] Electronic paper, also known as digital paper, is an ultra-thin and ultra-light display screen, which is figuratively understood as a "display that is as thin, soft and erasable as paper". Electronic paper uses reflective display, relying on reflecting ambient light to display content, and does not actively emit light, which can provide clear and natural visual effects under various light conditions, similar to reading paper books, and long-time viewing does not easily cause eye fatigue.

[0043] 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.

[0044] 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.

[0045]

Display panel

[0046] In an embodiment, referring to Figure 1 and Figure 2 , the display panel 100 includes a first array substrate 1 and a first base 2. The first base 2 is arranged on the first array substrate 1, and the first base 2 is provided with a first pixel space 3. The first pixel space 3 contains a first photonic crystal 4, a first black substance 5 and a first dispersion medium 6. The first array substrate 1, the first base 2, the first photonic crystal 4 and the first dispersion medium 6 can all transmit light. The display panel 100 includes a display state and a transparent state. In the display state, the first photonic crystal 4 is uniformly dispersed in the first dispersion medium 6, and at least part of the first black substance 5 is adsorbed to the bottom wall of the first pixel space 3. In the transparent state, the first photonic crystal 4 is gathered in the first dispersion medium 6, and the first black substance 5 is adsorbed to the side wall of the first pixel space 3.

[0047] 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.

[0048] 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.

[0049] In specific embodiments, an electric field can be formed between the second packaging plate 8 and the bottom wall of the first substrate 2, and the direction of the electric field can be from the second packaging plate 8 to the bottom wall of the first substrate 2, or from the bottom wall of the first substrate 2 to the second packaging plate 8. That is, the second packaging plate 8 can be positive, and the bottom wall of the first substrate 2 can be negative; or, the second packaging plate 8 can be negative, and the bottom wall of the first substrate 2 can be positive.

[0050] In specific embodiments, the first pixel space 3 contains the first photonic crystal 4, the first black substance 5, and the first dispersion medium 6, wherein the first dispersion medium 6 is a solvent, and the first photonic crystal 4 and the first black substance 5 are solutes dispersed in the first dispersion medium 6. The first photonic crystal 4 is a transparent substance and can be used to reflect light; the first black substance 5 is black and can be used to absorb light. When an electric field is formed between the second packaging 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 action of the electric field.

[0051] In specific embodiments, the first photonic crystal 4 refers to a man-made periodic dielectric structure with photonic band gap characteristics. Such a structure prohibits the propagation of light in a specific frequency range, resulting in the reflection or scattering of light in a specific direction, thereby producing structural color. When the first photonic crystal 4 is arranged in order, it has strong reflectivity and can achieve color display by reflecting natural light. When it agglomerates, it does not have reflectivity, and light can directly pass through the material itself to achieve transparent display.

[0052] In specific embodiments, after the light passes through the second packaging substrate and irradiates on the first photonic crystal 4, a photonic band gap structure is generated due to the periodic change of the refractive index of light. If the energy of electromagnetic waves falls within the band gap, it cannot continue to propagate and is selectively reflected. When the reflected electromagnetic waves have a wavelength range comparable to that of visible light, a color visible to the naked eye is produced, and the structural color has the advantages of high color saturation, high brightness, and no light bleaching.

[0053] In specific embodiments, since the first photonic crystal 4 has excellent color development characteristics and reflection characteristics, when the first photonic crystal 4 is applied to the display panel 100, there is no need to additionally increase the filter and reflection layer structure. Therefore, the display panel 100 of the present application does not need to add a filter and a reflection layer structure, so that compared with other display structures, the display panel 100 of the present application has the advantages of thinner thickness and lighter mass.

[0054] In specific embodiments, the first photonic crystal 4 has iridescence effect due to its color rendering property. When applied to display, the display color of the first photonic crystal 4 changes with the change of viewing angle, so the single first photonic crystal 4 affects the display effect, i.e. causes the display quality to decrease. Therefore, the first black substance 5 is added to the first pixel space 3 in the present application. The first black substance 5 can absorb the excess scattered light, effectively reduce the angle dependence, and improve the display contrast.

[0055] In specific embodiments, the first black substance 5 has electrical conductivity, and the first black substance 5 can move in the electric field between the second packaging plate 8 and the bottom wall of the first substrate 2, i.e. in the first pixel space 3. By controlling the presence or absence of the electric field and the field 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, and the first black substance 5 can also be used to shield or expose the bottom wall of the first pixel space 3, so that the display panel 100 presents an opaque or transparent state.

[0056] In specific embodiments, in the absence of an applied electric field, the first black substance 5 can be adsorbed on the side wall of the first pixel space 3 by attractive force such as electrostatic attraction or van der Waals force. The first photonic crystal 4 is gathered 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.

[0057] In specific embodiments, the first black substance 5 has strong light absorption properties, which can effectively absorb the light scattered in the first photonic crystal 4, reduce the multi-angle reflected light interference caused by the periodic structure, and finally make the structural color more saturated and the iridescence effect weaker. The first black substance 5 has strong electrical conductivity, and the first black substance 5 added to the first pixel space 3 can simultaneously improve the response of the first photonic crystal 4 to the electric field and the color saturation.

[0058] In specific embodiments, when the display panel 100 is in a display state, an electric field is formed between the second packaging plate 8 and the bottom wall of the first substrate 2. The first photonic crystal 4 and part of the first black substance 5 move to a position close to the second packaging plate 8 under the action of the electric field and are uniformly dispersed in the first dispersion medium 6. Part of the first black substance 5 is adsorbed on the bottom wall of the first pixel space 3. When light is incident into the first pixel space 3, light of a specific color is reflected by the first photonic crystal 4 and emitted from the second packaging plate 8 to form a display image. Light that is not reflected is refracted by the first photonic crystal 4 and absorbed by the first black substance 5.

[0059] In specific embodiments, when the display panel 100 is in a transparent state, no electric field is formed between the second encapsulation plate 8 and the bottom wall of the first substrate 2, the first photonic crystal 4 is gathered in the first dispersion medium 6 and is particularly located at the bottom wall of the first pixel space 3, and the first black substance 5 is adsorbed to the sidewall of the first pixel space 3. When light is irradiated into the first pixel space 3, the light is refracted via the gathered first photonic crystal 4, and the first black substance 5 does not affect the transmission of the light at the bottom wall of the first pixel space 3. The light is sequentially transmitted through the first substrate 2, the first array substrate 1 and the first encapsulation plate 7, and thus the display panel 100 presents a transparent state.

[0060] The present application provides a display panel 100 with high full-color display and high transparent display effect. By adding the first photonic crystal 4 in the first pixel space 3, in a display state, the first photonic crystal 4 is uniformly dispersed in the first dispersion medium 6, and the color reflection characteristic of the first photonic crystal 4 is utilized to reflect the light on the first photonic crystal 4 to form a display picture. In a transparent state, the gathered first photonic crystal 4 can transmit light due to isotropy, so that the display panel 100 can be transparent. By adding the first black substance 5 in the first pixel space 3, in a display state, the first black substance 5 adsorbed to 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 degree in display. In a transparent state, the first black substance 5 is adsorbed to the sidewall of the first pixel space 3, and the first black substance 5 does not affect the light transmitted through the first photonic crystal 4, thereby improving the transparency.

[0061] In some embodiments, referring to Figure 3 , the number of the first pixel spaces 3 is multiple, and the multiple first pixel spaces 3 are independent of each other and arranged in multiple rows and multiple columns. Specifically, the top view of the first substrate 2 can be a "chessboard" structure, and the multiple first pixel spaces 3 are arranged in an array. The first photonic crystal 4, the first black substance 5 and the first dispersion medium 6 are injected into each first pixel space 3.

[0062] In specific embodiments, one first pixel space 3 and the first photonic crystal 4, the first black substance 5 and the first dispersion medium 6 therein together constitute a pixel unit, and thus the 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 a picture.

[0063] In some embodiments, referring to Figure 3In the first base 2, three different first photonic crystals 4 are included, which are photonic crystal one 14, photonic crystal two 15 and photonic crystal three 16 respectively. The three different first photonic crystals 4 refer to the size (particle size) of the photonic crystal one 14, the photonic crystal two 15 and the photonic crystal three 16 are different. When they are uniformly distributed, the light will reflect the wavelengths corresponding to red, green and blue when they are irradiated, thereby realizing color display.

[0064] In specific embodiments, referring to Figure 3 In the first direction, three adjacent first pixel spaces 3 are opened on the first base 2, which are pixel space one 9, pixel space two 10 and pixel space three 11 respectively. The first direction is perpendicular to the thickness direction of the display panel 100. Among them, the photonic crystal one 14 is injected into the pixel space one 9, the photonic crystal two 15 is injected into the pixel space two 10, and the photonic crystal three 16 is injected into the pixel space three 11. The photonic crystal one 14 can be used to reflect red light, the photonic crystal two 15 can be used to reflect green light, and the 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. The three adjacent pixel units can jointly constitute a pixel point.

[0065] In specific embodiments, if the voltage between the second packaging plate 8 and the bottom wall of the first base 2 continues to increase, the uniformly dispersed first photonic crystals 4 will gather in one direction. With the increase of the gathering state, the reflection ability of the first photonic crystals 4 will gradually weaken, and finally it will not be able to reflect. Therefore, the distribution state of the three different reflection color first photonic crystals 4 can be controlled by the electric field respectively, so as to achieve the purpose of color display.

[0066] The present application realizes the independent division of multiple photonic crystals by opening multiple independent first pixel spaces 3 on the first base 2, so that they are not affected by each other. At the same time, since each photonic crystal is independently packaged, the first dispersion medium 6 in the material cannot be directly in contact with the frame glue. The first base 2 is made of stable material, which has the characteristics of strong chemical stability, insolubility in water and organic solvents, etc., so it cannot be dissolved in the first dispersion medium 6, which can ensure the reliability of packaging and the stability of the material.

[0067] In some embodiments, the specifications of all the first photonic crystals 4 in the first base 2 are the same, that is, the first photonic crystals 4 of uniform specifications are used throughout the display panel 100. The electric field intensity applied in the multiple first pixel spaces 3 is different, and due to the difference in electric field intensity, the arrangement of the first photonic crystals 4 will also be affected. With the increase of the electric field intensity, the wavelength reflected by the first photonic crystals 4 will gradually blue shift.

[0068] In specific embodiments, three first pixel spaces 3 are formed on the first substrate 2 in the first direction, which are pixel space one 9, pixel space two 10 and pixel space three 11. The electric field intensity in the pixel space one 9 is the smallest, the electric field intensity in the pixel space two 10 is the second smallest, and the electric field intensity in the pixel space three 11 is the largest. In this way, the three adjacent pixel units can reflect different light and can jointly constitute a pixel. The first photonic crystal 4, the first black substance 5 and the first dispersion medium 6 in the three adjacent first pixel spaces 3 can be the same.

[0069] In some embodiments, the first photonic crystal 4 includes one or more of silicon dioxide, polystyrene, polymethyl methacrylate, and silicon nitride. The above-mentioned materials have certain light transmission properties, so when the first photonic crystal 4 does not reflect light, the light will pass through the material itself, showing a transparent state, which lays the foundation for realizing the transparent display panel 100.

[0070] In some embodiments, the first dispersion medium 6 includes one or more of propylene carbonate, polyethylene glycol, formanilide, diethylene glycol ether propylene acetate, polychlorinated biphenyl, ethanol, diethyl ether, acetone, and toluene. The first dispersion medium 6 does not react with the first photonic crystal 4 and the first black substance 5, that is, the two can stably exist in the first dispersion medium 6, and the above-mentioned materials also have light transmission properties and can transmit light.

[0071] In some embodiments, the first black substance 5 includes one or more of carbon black, graphene, carbon nanotubes, graphite, ruthenium dioxide, and black tin oxide. The first black substance 5 not only has strong light absorption properties and can effectively absorb light scattered inside the first photonic crystal 4, but also has excellent performance in terms of electrical conductivity and can be controlled by the electric field intensity to affect its movement.

[0072] In some embodiments, 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 amounts of charge. 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 to the bottom wall of the first pixel space 3.

[0073] In a specific embodiment, two different first black substances 5 are injected into the first pixel space 3, which are respectively a first black sub-substance 17 and a second black sub-substance 18. The first black sub-substance 17 and the second black sub-substance 18 can refer to the material categories of the first black substance 5 provided in the above-mentioned embodiments. The first black sub-substance 17 and the second black sub-substance 18 have the same charge (same polarity), but the amount of charge carried by the first black sub-substance 17 and the second black sub-substance 18 is different. Without the application of an electric field, the first black sub-substance 17 and the second black sub-substance 18 can be attracted to the side wall of the first pixel space 3 by electrostatic attraction or Van der Waals force, etc.

[0074] In a specific embodiment, the second black sub-substance 18 can carry more charge, and the amount of charge of the first black sub-substance 17 is less. Therefore, the second black sub-substance 18 will be more sensitive to changes in the electric field, and when an electric field is applied in the first pixel space 3 (display state), the second black sub-substance 18 can move from the side wall of the first pixel space 3 to the bottom wall of the first pixel space 3 and uniformly distribute on the bottom wall of the first pixel space 3; due to the smaller amount of charge carried by the first black sub-substance 17, the attractive force of the first black sub-substance 17 to the side wall of the surrounding first pixel space 3 will be offset by the attractive force of the electric field, and the first black sub-substance 17 will not be adsorbed to the surrounding side wall, and at the same time affected by the attractive force between the dispersed first photonic crystals 4, the first black sub-substance 17 will be uniformly dispersed between the first photonic crystal 4 materials, thereby achieving the purpose of enhancing the display effect.

[0075] In some embodiments, please refer to Figure 4 , the display panel 100 also includes a non-transparent state, in which the first photonic crystal 4 is aggregated in the first dispersion medium 6, the first black sub-substance 17 is adsorbed to the side wall of the first pixel space 3, and the second black sub-substance 18 is adsorbed to the bottom wall of the first pixel space 3.

[0076] In a specific embodiment, the non-transparent state means that when the display panel 100 does not need to display, the display panel 100 also presents a non-transparent state. When a weak electric field is applied in the first pixel space 3 (display state), the second black sub-substance 18 can move from the side wall of the first pixel space 3 to the bottom wall of the first pixel space 3 and uniformly distribute on the bottom wall of the first pixel space 3; while the weak electric field is not enough to offset the attractive force of the first black sub-substance 17 to the side wall of the surrounding first pixel space 3, and since the electric field is relatively weak, the first photonic crystal 4 will remain unchanged; therefore, only the second black sub-substance 18 is adsorbed to the bottom wall of the first pixel space 3. After the light is incident into the first pixel space 3, it is transmitted through the first photonic crystal 4 and is absorbed by the second black sub-substance 18.

[0077] 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.

[0078] 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.

[0079] 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 during double-sided display can be effectively avoided.

[0080] In one embodiment, please refer to Figures 5-7The application also provides another combination of black substance. The first black substance 5 comprises a first black sub substance 17 and a second black sub substance 18, the first black sub substance 17 and the second black sub substance 18 have different polarities of electric 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 to the bottom wall of the first pixel space 3.

[0081] In specific embodiments, different from the above-mentioned embodiments, the first black sub substance 17 and the second black sub substance 18 can also be two materials with 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 amount of electric charges of the first black sub substance 17 and the second black sub substance 18 can be the same or different.

[0082] In specific embodiments, the display panel 100 further comprises a first electrode 19 and a second electrode 20, the first electrode 19 and the second electrode 20 are arranged on the side walls in the first pixel space 3, and the first electrode 19 and the second electrode 20 are arranged on opposite side walls of the first pixel space 3, that is, the first electrode 19 and the second electrode 20 are oppositely arranged, and the first electrode 19 and the second electrode 20 have a spacing distance. Optionally, the first electrode 19 and the second electrode 20 can be ITO (indium tin oxide). It can be understood that the materials of the first electrode 19 and the second electrode 20 can be the same, and the first electrode 19 and the second electrode 20 can be completely the same (thickness, etc.), and only when an electric field is applied to the first electrode 19 and the second electrode 20, the first electrode 19 and the second electrode 20 are distinguished.

[0083] In specific embodiments, in the transparent state, a positive electric is applied at the first electrode 19, and a negative electric is applied at the second electrode 20, and an electric field is formed between the two. Since the first black sub substance 17 and the second black sub substance 18 have different electric 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 gathered at the positive electrode. Due to the gathering of the first photonic crystal 4, the incident light can pass through the first pixel space 3 and the first photonic crystal 4, thereby realizing transparent display.

[0084] In a specific embodiment, in the non-transparent state, positive electricity (or negative electricity) is applied at both the first electrode 19 and the second electrode 20, negative electricity (or positive electricity) is applied at the bottom wall of the first pixel space 3, the positively charged second black sub-particles 18 are adsorbed to the bottom wall of the first pixel space 3, and the first black sub-particles 17 are adsorbed to the side wall of the first pixel space 3 (i.e. the first electrode 19 and the second electrode 20). As the electric field changes, the arrangement of the first photonic crystal 4 also changes accordingly and is stacked at the first electrode 19 and the second electrode 20. At this time, due to the arrangement of the photonic crystal, after the light is incident into the first pixel space 3, it is transmitted through the first photonic crystal 4 and is absorbed by the second black sub-particles 18. In this state, the mutual interference of the double-sided light during double-sided display can be effectively avoided.

[0085] In a specific embodiment, in the display state, no electric field is provided at the first electrode 19 and the second electrode 20, negative electricity (or positive electricity) can be applied at the bottom wall of the first pixel space 3, and positive electricity (or negative electricity) is applied on the second packaging plate 8, so that an electric field is formed between the bottom wall of the first pixel space 3 and the second packaging plate 8. The first black sub-particles 17 fall off from the side wall and mix with the first photonic crystal 4, 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 to the bottom wall of the first pixel space 3.

[0086] In some embodiments, referring to Figure 8 , the first substrate 2 includes a support body 12 and a stabilizing layer 13, the support body 12 is provided with the 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, which are 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 substance, and the stabilizing layer 13 does not react with the first dispersion medium 6.

[0087] In some embodiments, the support body 12 includes one or more of positive photoresist and negative photoresist. The above-mentioned materials themselves have certain light transmission, so that when the light is transmitted through the first photonic crystal 4, it can be incident into the support body 12 and be emitted out, and then be transmitted into the first packaging plate 7. It can be polystyrene.

[0088] In some embodiments, the stabilizing layer 13 includes one or more of silicon carbide and silicon oxide. The above-mentioned materials themselves have certain light transmission, so that when the light is transmitted through the first photonic crystal 4, it can be incident into the stabilizing layer 13 and be emitted into the support body 12.

[0089] In the prior art, the conventional transparent electronic paper display device is susceptible to light from both the front and back sides when displaying due to its transparency, and thus the conventional transparent electronic paper display device cannot directly realize double-sided display. If double-sided display is to be realized on the original transparent electronic paper display device, the light from both sides needs to be prevented from interfering with each other. If the transparent display and the double-sided display of the electronic paper can be switched with each other, the application range of the transparent electronic paper display device can be effectively expanded, and the user can have a more extreme experience. Therefore, the present application also provides a display panel 100 capable of double-sided display based on the above-mentioned embodiments.

[0090] In an embodiment, referring to Figure 9 and Figure 10 , the display panel 100 further comprises 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 away from the first base 2; the second base 22 is arranged on the side of the second array substrate 21 away from the first array substrate 1, and the second base 22 is provided with a second pixel space 23, and 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 the transparent state, the second photonic crystal 24 is deposited in the first dispersion medium 6 and is aggregated, and the second black substance 25 is adsorbed on the sidewall of the second pixel space 23.

[0091] In a specific embodiment, referring to Figure 9 and Figure 10 , the second array substrate 21 is connected to the first packaging plate 7 and is arranged on the side of the first packaging plate 7 away from the first array substrate 1. The display panel 100 further comprises a third packaging plate 31, which is the same as the first packaging plate 7 and the second packaging plate 8, i.e. the third packaging plate 31 is also capable of transmitting light. The third packaging plate 31 is arranged on the side of the second base 22 away from the second array substrate 21.

[0092] In a specific embodiment, the third packaging plate 31, the second base 22, the second array substrate 21, the first packaging plate 7, the first array substrate 1, the first base 2 and the second packaging plate 8 are sequentially stacked. The second base 22 forms the second pixel space 23 from the side away from the second array substrate 21, i.e. the opening of the second pixel space 23 faces the third packaging plate 31. The third packaging plate 31 is used to close the opening of the second pixel space 23.

[0093] In an embodiment, the display panel 100 comprises a first display area 27 and a second display area 28. The first display area 27 comprises the first array substrate 1, the first base 2 and the second encapsulation plate 8, and the first photonic crystal 4, the first black substance 5 and the first dispersion medium 6 in the first pixel space 3. The second display area 28 comprises the second array substrate 21, the second base 22 and the third encapsulation plate 31, and the second photonic crystal 24, the second black substance 25 and the second dispersion medium 26 in the second pixel space 23. External light can be transmitted through the third encapsulation plate 31 to the second pixel space 23. Of course, light can also be transmitted through the first display area 27 into the second display area 28 and emitted by the second display area 28, thereby realizing the transparent and double-sided display effect of the display panel 100.

[0094] In an embodiment, the second photonic crystal 24 and the first photonic crystal 4 use the same material, and the second photonic crystal 24 is arranged in the second display area 28 in the same way as the first photonic crystal 4 is arranged in the first display area 27, i.e., the reflection principle of the second photonic crystal 24 to specific light can be different sizes or different voltages.

[0095] In an embodiment, the second black substance 25 and the first black substance 5 use the same material. Of course, the second black substance 25 can comprise a third black substance 29 and a fourth black substance 30, and the third black substance 29 and the fourth black substance 30 have different amounts of charge. The second dispersion medium 26 and the first dispersion medium 6 use the same material.

[0096] In an 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 comprise a transparent state, a non-transparent state, a single-sided display state and a double-sided display state. The transparent state means that the first display area 27 and the second display area 28 are transparently displayed, and the transparent display manner can refer to the above-mentioned embodiments. The non-transparent state means that the first display area 27 and the second display area 28 are non-transparently displayed, and the non-transparent display manner can refer to the above-mentioned embodiments.

[0097] In specific embodiments, the single-side display state refers to either of the first display area 27 and the second display area 28 displaying a picture. Taking the first display area 27 displaying a picture as an example, the first display area 27 displays a picture according to the above-described implementation, and the second display area 28 can be transparent display or non-transparent display (which can refer to the above-described transparent state or non-transparent state). Alternatively, when the first display area 27 displays a picture, the second display area 28 can be non-transparent display, that is, the third black sub-particle 29 is adsorbed to the side wall of the second pixel space 23, and the fourth black sub-particle 30 is adsorbed to the bottom wall of the second pixel space 23, so as to further absorb the light transmitted from the first display area 27, and make the color displayed by the first display area 27 more saturated.

[0098] In specific embodiments, when an electric field is applied, the first black sub-particle 17 (or the third black sub-particle 29) is uniformly distributed in the photonic crystal, so that the photonic crystal presents a short-range ordered and overall disordered arrangement state, thereby effectively reducing the structure dependence and enhancing the display effect. The second black sub-particle 18 (or the fourth black sub-particle 30) is uniformly distributed on the bottom side, further increasing the display contrast. For the pixel units or display areas that do not need to display, when no electric field is applied, both kinds of black sub-particles are uniformly distributed along the surrounding wall, and the photonic crystal is gathered at the bottom and cannot reflect light. Since the photonic crystal itself has transparency, single-side display or transparent display is achieved.

[0099] In specific embodiments, the double-side display state refers to both the first display area 27 and the second display area 28 displaying a picture. The first black sub-particle 17 is uniformly dispersed in the first dispersion medium 6, the second black sub-particle 18 is adsorbed to the bottom wall of the first pixel space 3, and the first photonic crystal 4 is uniformly dispersed in the first dispersion medium 6. The third black sub-particle 29 is uniformly dispersed in the second dispersion medium 26, the fourth black sub-particle 30 is adsorbed to the bottom wall of the second pixel space 23, and the second photonic crystal 24 is uniformly dispersed in the second dispersion medium 26.

[0100] In specific embodiments, when the double-side display state, the array substrate can apply a very low electric field to the pixel units that do not need to display, and the second black sub-particle 18 (or the fourth black sub-particle 30) is adsorbed to the bottom wall of the pixel space, so that the single pixel unit that does not need to display presents non-transparent, avoiding the influence of light transmission on the display area at the back. The first black sub-particle 17 (or the third black sub-particle 29) will not be affected by the low electric field, and will remain in the same state as when it does not need to display. At the same time, since there is a layer of black sub-particle on the bottom wall of the pixel space and the side wall of the pixel space on both sides to absorb the unreflected light, interference between the display light on both sides can be effectively avoided, and the display quality of the display panel 100 can be ensured while achieving double-side display.

[0101] 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.

[0102] The manufacturing method of the display panel

[0103] In an embodiment, the application further provides a manufacturing method of a display panel, please refer 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:

[0104] 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.

[0105] Step S200, a first photonic crystal, a first black substance and a first dispersion medium are injected into the first pixel space, and the first base is encapsulated to obtain the display panel.

[0106] In specific embodiments, please refer 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:

[0107] Step S101, after the first array substrate with completed array process is cleaned, the first base is prepared by chemical vapor deposition (CVD).

[0108] In specific embodiments, please refer 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:

[0109] 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.

[0110] 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.

[0111] Step S104, the remaining photoresist material is removed by using a photoresist removing liquid, and then the first substrate is cleaned again to remove the photoresist removing liquid, the etching liquid and residues, and finally the first substrate with the first pixel space is obtained.

[0112] In specific embodiments, referring to Figure 13 When the first black sub-material and the second black sub-material have different charges respectively, electrodes need to be made in the first pixel space, including:

[0113] Step S105, the first electrode and the second electrode are made on the opposite sidewalls of the first pixel space, and the first electrode and the second electrode can be made of the same material, which is ITO.

[0114] In specific embodiments, referring to Figure 13 The first photonic crystal includes silicon dioxide, the first dispersion medium includes propylene carbonate, and in step S200, the first photonic crystal, the first black material and the first dispersion medium are injected into the first pixel space, including:

[0115] Step S201, the mixed liquid of the uniformly distributed first photonic crystal, the first black material and the first dispersion medium prepared is classified according to the structural color of the photonic crystal, and is sequentially added to the first pixel space by using an inkjet printing technology.

[0116] In specific embodiments, referring to Figure 13 The display panel further includes a second packaging plate, and in step S200, the first substrate is packaged, including:

[0117] Step S202, the first substrate is laminated and packaged with the second packaging plate coated with a frame glue in a vacuum environment, and then is subjected to light hardening and heat hardening to obtain the display panel.

[0118] The first pixel space on the first substrate is opened, so that each first pixel space becomes an independent pixel unit, and the first substrate and the second packaging plate are packaged, which can effectively avoid direct contact between the frame glue and the material, solve the problem of dissolving the frame glue in the first dispersion medium, and make the manufacturing method simpler and the cost lower.

[0119] In one embodiment, the application further provides a manufacturing method of a double-sided display display panel, referring to Figure 14 The manufacturing method of the display panel is used for manufacturing the double-sided display display panel provided in the above embodiments, and includes the following steps.

[0120] Step S1, after the first array substrate which has completed the array process is cleaned, the array process is performed again on the back of the first packaging plate, and the second array substrate is prepared on the back of the first packaging plate.

[0121] Step S2, after the first array substrate which has completed the array process is cleaned, the first substrate with the first pixel space is prepared on the first array substrate by chemical vapor deposition technology and photolithography technology.

[0122] Step S3, after the second array substrate which has completed the array process is cleaned, the second substrate with the second pixel space is prepared on the second array substrate by chemical vapor deposition technology and photolithography technology.

[0123] Step S4, the mixed solution of the first photonic crystal, the first black substance and the first dispersion medium is classified according to the structural color of the photonic crystal, and is added to the first pixel space by inkjet printing technology, and the first substrate is packaged.

[0124] Step S5, the mixed solution of the second photonic crystal, the second black substance and the second dispersion medium is classified according to the structural color of the photonic crystal, and is added to the second pixel space by inkjet printing technology, and the second substrate is packaged, so as to obtain the display panel capable of double-sided display.

[0125] In some embodiments, referring to Figure 15 , the first substrate includes a support body and a stabilizing layer, the first substrate is arranged on the first array substrate, and the first pixel space is opened on the first substrate, which includes: arranging the support body on the first array substrate, and opening the first pixel space on the support body; depositing a stabilizing material on the inner wall of the first pixel space, and the stabilizing material forms the stabilizing layer and covers the inner wall of the first pixel space.

[0126] In specific embodiments, the method for manufacturing the display panel with the support body and the stabilizing layer includes the following steps:

[0127] Step S11, after the first array substrate which has completed the array process is cleaned, a layer of photoresist material is coated on the first array substrate, and then the support body is obtained after vacuum drying and pre-baking shaping in sequence.

[0128] Step S12, the first pixel space is opened on the support body by exposure, development and curing process, so that each first pixel space is separately separated, and the side wall of the first pixel space has a gradient.

[0129] Step S13, a stabilizing material is deposited on the side of the support body 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 the stabilizing layer.

[0130] Step S14, the prepared mixed solution of the first photonic crystal, the first black substance and the first dispersion medium is added to the first pixel space in sequence according to the structural color of the photonic crystal through the inkjet printing technology.

[0131] Step S15, the first substrate is bonded and packaged with the second packaging plate coated with frame glue in a vacuum environment, and then is subjected to light hardening and heat hardening to obtain the display panel.

[0132] The first substrate is prepared by combining the support body of the polymer and the stable layer with high stability, and the scheme of preparing the substrate only by using the stable material is replaced, so that the manufacturing difficulty of the first substrate is reduced, and the structure has higher universality, the support body with the required height and gradient is prepared, and then a stable layer is plated on the support body, so that the process limitation problem is effectively solved, the manufacturing cost is reduced, and the support body and the stable layer do not affect the display effect.

[0133] The display panel prepared by the above embodiment is prepared by applying the photonic crystal and the black substance in the display panel, which not only simplifies the manufacturing process of the transparent and double-sided display, but also greatly reduces the production cost, avoids more complex, more difficult and higher cost schemes. At the same time, the new display structure and process design can also be applied to other display materials that need to be packaged, has higher universality, and the overall thickness is thinner and the quality is lighter, greatly improving the competitive advantage in the transparent display field.

[0134]

Electronic paper

[0135] In some embodiments, the application also provides an electronic paper, which comprises the display panel provided by the above-mentioned embodiments, or the display panel manufactured by the manufacturing method of the display panel provided by the above-mentioned embodiments.

[0136] The application provides electronic paper, which breaks through the limitation of the existing electronic paper architecture, and provides a new direction for the improvement and innovation of the transparent display field. At the same time, the designed new electronic paper not only realizes the transparent display of the electronic paper, but also realizes brighter and more saturated full-color display due to the bright structural color characteristics of the photonic crystal.

[0137] At the same time, based on the excellent reflection performance and color development performance of the photonic crystal, the designed structure is also simpler and thinner compared with the traditional electronic paper, and the preparation process is also simpler. Under the premise of ensuring high-quality transparent display, the production cost can be greatly saved.

[0138] In addition, the electronic paper can also realize double-sided display of the electronic paper through switching mode. Full-color display can be realized, and the response speed can also be effectively improved. When double-sided display is performed, full-color display can be provided, and interference between light on two sides can be avoided, so that higher quality display effect is brought to the electronic paper.

[0139] 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 refer to the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present application and simplifying 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.

[0140] 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 is not considered as limiting the order of the steps. The steps written in the front can be executed first, or can be executed later, or even can be executed simultaneously, as long as the present scheme can be implemented, it should be considered as belonging to the protection scope of the present application.

[0141] The above only discloses a preferred embodiment of the present application, of course, cannot limit the scope of the present application, and those skilled in the art can understand that the above-mentioned embodiment can be implemented in whole or in part, and the equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A display panel, characterized by, Comprise: A first array substrate; A first base provided on the first array substrate, the first base being provided with a first pixel space, the first pixel space containing a first photonic crystal, a first black substance and a first dispersion medium; the first black substance comprising a first black sub-substance and a second black sub-substance, the first black sub-substance and the second black sub-substance having different amounts of electric charges; 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 comprises a display state and a transparent state, in the display state, the first photonic crystal and the first black sub-substance are uniformly dispersed in the first dispersion medium, and the second black sub-substance is adsorbed to the bottom wall of the first pixel space; in the transparent state, the first photonic crystal is gathered in the first dispersion medium, and the first black substance is adsorbed to the side wall of the first pixel space.

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

3. The display panel of claim 1, wherein, The display panel further comprises a non-transparent state, in the non-transparent state, the first photonic crystal is gathered in the first dispersion medium, the first black sub-substance is adsorbed to the side wall of the first pixel space, and the second black sub-substance is adsorbed to the bottom wall of the first pixel space.

4. The display panel of claim 1, wherein, The first base comprises a support body and a stabilizing layer, the support body is provided with the first pixel space, and the stabilizing layer covers the inner wall of the first pixel space.

5. The display panel of claim 4, wherein: The support body comprises one or more of positive photoresist, negative photoresist; and / or The stabilizing layer comprises one or more of silicon carbide, silicon oxide.

6. The display panel according to any one of claims 1-5, characterized in that, The display panel further comprises: A second array substrate provided on the side of the first array substrate away from the first base; A second base provided on the side of the second array substrate away from the first array substrate, the second base being provided with a second pixel space, the second pixel space containing a second photonic crystal, a second black substance and a second dispersion medium; the second black substance comprising a third black sub-substance and a fourth black sub-substance, the third black sub-substance and the fourth black sub-substance having different amounts of electric charges; 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 in the second dispersion medium and gathered, and the second black substance is adsorbed to the side wall of the second pixel space.

7. A method for manufacturing a display panel, characterized in that, The manufacturing method of the display panel is used for manufacturing the display panel according to any one of claims 1-6, and the manufacturing method comprises: arranging a first base on the first array substrate, and opening a first pixel space on the first base to obtain the first base with the first pixel space; injecting a first photonic crystal, a first black substance and a first dispersion medium into the first pixel space, and packaging the first base to obtain the display panel.

8. The manufacturing method of a display panel according to claim 7, wherein, arranging the first base on the first array substrate, and opening the first pixel space on the first base, comprising: arranging a support body on the first array substrate, and opening the first pixel space on the support body; depositing a stabilizing material on the inner wall of the first pixel space, wherein the stabilizing material forms a stabilizing layer and covers the inner wall of the first pixel space.

9. An electronic paper, characterized by comprising: The electronic paper comprises the display panel according to any one of claims 1-6; or the electronic paper comprises the display panel manufactured by the manufacturing method of the display panel according to claim 7 or 8.

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