TWI813493B - Display device - Google Patents

Abstract

A display device includes a substrate, a transparent cover, a transparent electrode, a dark solution and a plurality of porous electrodes. The transparent cover is overlapped with and disposed on the substrate. The transparent electrode is disposed between the transparent cover and the substrate. The dark solution is between the transparent electrode and the substrate. The plurality of porous electrodes is disposed on the substrate and in the dark solution.

Description

display device

The present invention relates to a display device, and in particular to a reflective display device.

Electrophoretic displays have attracted market attention because of their energy-saving and environmentally friendly advantages. They use the reflection or absorption of ambient light to produce bright or dark states to achieve display purposes, so there is no need to set up an additional light source. Generally speaking, the electrophoretic display film (EPD film) of an electrophoretic display is mainly composed of an electrophoretic liquid and charged particles suspended in the electrophoretic liquid. It drives the charged particles to move by applying a voltage, thereby switching the darkness of each sub-pixel. State and bright state. However, as the use time of the electrophoretic display increases, the charged particles in the electrophoretic solution may agglomerate between particles, spread unevenly, or adhere to the surface of the component, resulting in poor display quality or reliability of the electrophoretic display.

The present invention provides a display device with improved reliability.

One embodiment of the present invention provides a display device, including: a substrate; a light-transmitting cover plate stacked on the substrate; a light-transmitting electrode located between the light-transmitting cover plate and the substrate; and a dark solution located between the light-transmitting electrode and the substrate between; and multiple porous electrodes located on the substrate and in the dark solution.

In an embodiment of the present invention, the above-mentioned substrate includes a plurality of active components.

In an embodiment of the present invention, the plurality of porous electrodes are electrically connected to the plurality of active components respectively.

In an embodiment of the present invention, the above-mentioned porous electrode is ductile.

In an embodiment of the present invention, the porous electrode is made of silver or aluminum.

In an embodiment of the present invention, the thickness of the porous electrode is between 0.5 μm and 2 μm.

In an embodiment of the present invention, the holes of the above-mentioned porous electrode are arranged regularly.

In an embodiment of the present invention, the above-mentioned display device further includes a dielectric layer located between the light-transmitting electrode and the dark solution.

In an embodiment of the present invention, the above-mentioned display device further includes an optical film, wherein the light-transmitting electrode is located between the optical film and the dark solution.

In an embodiment of the present invention, the above-mentioned optical film includes a surface microstructure, and the light-transmitting electrode is located on the surface of the surface microstructure.

In an embodiment of the present invention, the surface contour shapes of the above-mentioned porous electrode and the light-transmitting electrode are complementary.

In an embodiment of the present invention, the above-mentioned display device further includes a color conversion layer, and the color conversion layer is located between the light-transmitting cover plate and the light-transmitting electrode.

In one embodiment of the present invention, the above-mentioned color conversion layer includes a plurality of color filter structures, and the orthographic projection of the color filter structure on the substrate overlaps the orthographic projection of the porous electrode on the substrate.

In an embodiment of the present invention, the above-mentioned color conversion layer further includes a plurality of light-shielding structures. The light-shielding structures are located between the color filter structures and overlap the porous electrodes connected to the substrate.

In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, embodiments are given below and described in detail with reference to the accompanying drawings.

FIG. 1A is a schematic top view of a display device 10 according to an embodiment of the present invention. FIG. 1B is a schematic cross-sectional view taken along the cross-sectional line A-A' of FIG. 1A , showing that the sub-pixel PX1 of the display device 10 is in a dark state. FIG. 1C is a schematic cross-sectional view of the sub-pixel PX1 of the display device 10 in a bright state. In order to simplify the expression of the diagram, FIG. 1A schematically illustrates the substrate 110 and the porous electrode 140, and omits other components.

Referring to FIGS. 1A to 1C , the display device 10 includes: a substrate 110; a light-transmitting cover 160 stacked on the substrate 110; a light-transmitting electrode 120 located between the light-transmitting cover 160 and the substrate 110; a dark solution 130, between the light-transmitting electrode 120 and the substrate 110; and a plurality of porous electrodes 140 located on the substrate 110 and in the dark solution 130.

In the display device 10 according to an embodiment of the present invention, the light state and dark state of each sub-pixel are switched by the bonding or separation between the light-transmitting electrode 120 and the porous electrode 140, and the dark solution 130 can be displayed The dark state does not require the use of charged particles, so problems such as aggregation, uneven diffusion, or adhesion between particles caused by the use of charged particles can be eliminated, thereby improving the reliability of the display device 10 . The following will continue to describe the implementation of each component of the display device 10 with reference to FIGS. 1A to 1C , but the present invention is not limited thereto.

Please refer to FIG. 1A and FIG. 1B simultaneously. The display device 10 includes a plurality of sub-pixels PXs, and the plurality of sub-pixels PXs can be arranged in an array on the substrate 110, but is not limited to this. In some embodiments, the sub-pixels PXs may be arranged on the substrate 110 in other regular manners or irregular manners.

Each sub-pixel PXs may include a light-transmitting electrode 120, a dark solution 130, and a porous electrode 140. In this embodiment, the display device 10 may further include a driving element DC, and the driving element DC may be electrically connected to the sub-pixels PXs to transmit signals to the light-transmitting electrode 120 and the porous electrode 140, or to the light-transmitting electrode 120 and the porous electrode. Electrode 140 applies voltage. In some embodiments, the driving component DC may be a chip bonded to the circuit substrate 110 or a circuit component (including active components, passive components, or a combination thereof) directly formed in the circuit substrate 110 .

In this embodiment, the substrate 110 may be an active element array substrate, but is not limited thereto. For example, referring to FIG. 1B , the substrate 110 may include a base plate 111 and a plurality of active components 112 disposed on the base plate 111 . The base plate 111 may be a transparent substrate or a non-transparent substrate, and its material may be, for example, a quartz substrate, a glass substrate, a polymer substrate, or other appropriate materials. The base plate 111 can carry components or circuits required by the display device 10, such as driving components, switching components, storage capacitors, power lines, driving signal lines, timing signal lines, current compensation lines, detection signal lines, etc.

Multiple active devices 112 may be arranged in an array, and each active device 112 is electrically connected to the porous electrode 140 of each sub-pixel PXs. As shown in FIG. 1B , the active component 112 includes a gate 112G, a channel layer 112C, a gate insulating layer GI, a source 112S, and a drain 112D. The gate insulating layer GI is disposed between the gate 112G and the channel layer 112C. The source 112S and the drain 112D are in contact with the channel layer 112C respectively. The gate 112G and the source 112S can, for example, respectively receive signals from the driving element DC, and the drain 112D can be electrically connected through the conductive structure CS in the through hole VA of the planar layer PL. Porous electrode 140 is connected.

The material of the channel layer 112C may include silicon semiconductor materials (such as polycrystalline silicon, amorphous silicon, etc.), oxide semiconductor materials, and organic semiconductor materials. The materials of the gate 112G, the source 112S and the drain 112D may include metals with good conductivity, such as aluminum, molybdenum, titanium, copper and other metals, but the invention is not limited thereto. The material of the gate insulating layer GI may include transparent insulating materials, such as silicon oxide, silicon nitride, silicon oxynitride, or a stack of the above materials, but the invention is not limited thereto. The material of the flat layer PL may include, for example, transparent insulating materials, such as organic materials, acrylic materials, siloxane materials, polyimide materials, epoxy materials, etc. , but the present invention is not limited to this. The gate insulating layer GI and the flat layer PL can also have a single-layer structure or a multi-layer structure respectively. The multi-layer structure, such as a stack of two or more layers of any of the above materials, can be combined and changed as needed.

The light-transmitting electrodes 120 of each sub-pixel PXs may be electrically connected to each other, or the light-transmitting electrodes 120 may be applied with the same common voltage during operation. For example, in this embodiment, the light-transmitting electrodes 120 of each sub-pixel PXs may be physically connected to each other and receive the same voltage. In some embodiments, the light-transmitting electrodes 120 of each sub-pixel PXs may be physically separated from each other but electrically connected to receive the same voltage. However, in some embodiments, the light-transmissive electrodes 120 may be electrically separated from each other and receive the same or different voltages. The light-transmitting electrode 120 is a transparent conductive layer. For example, the material of the light-transmitting electrode 120 may include metal oxide such as zinc oxide, indium zinc oxide (IZO), indium tin oxide (ITO) or indium gallium zinc oxide (IGZO). materials, conductive polymers, carbon nanotubes, graphene or metal nanowires and other transparent conductive materials.

The porous electrodes 140 of each sub-pixel PXs can be separated from each other and independently receive signals provided by the driving element DC. For example, in this embodiment, the porous electrode 140 may include fixed parts 141 and 142 and a suspended part 143. The fixed parts 141 and 142 are located at both ends of the porous electrode 140, and the suspended part 143 is located between the fixed parts 141 and 142. . The porous electrode 140 can be electrically connected to the active element 112 through the fixing portion 142, so that the driving element DC can use the active element 112 to control the voltage of the porous electrode 140.

The dark solution 130 may be a solution that causes the sub-pixels PXs of the display device 10 to appear in a dark state, and the dark solutions 130 in each sub-pixel PXs may flow or be isolated from each other. For example, in this embodiment, the light-transmitting cover 160 is opposite to the substrate 110 , and the dark solution 130 may be black ink distributed between the entire substrate 110 and the light-transmitting cover 160 . In addition, the periphery of the light-transmitting cover 160 and the substrate 110 can also be sealed with sealant to prevent the dark solution 130 from flowing out. In some embodiments, the light transmittance of the light-transmitting cover 160 is preferably not less than 50%. For example, the light transmittance of the light-transmitting cover 160 may be more than 60%, but is not limited to this.

The suspended portion 143 of the porous electrode 140 may have ductility, so that it can deform under tensile stress or compressive stress to fit the light-transmitting electrode 120 or move away from the light-transmitting electrode 120 . In this way, the voltage of the light-transmitting electrode 120 and the porous electrode 140 can be controlled to make the floating portion 143 of the porous electrode 140 move away from or adhere to the light-transmitting electrode 120 .

For example, referring to FIG. 1B , when a voltage with the same electrical properties is applied to the light-transmitting electrode 120 and the porous electrode 140 , the light-transmitting electrode 120 and the porous electrode 140 will repel each other, so that the suspended portion 143 of the porous electrode 140 is away from the transparent electrode 120 and the porous electrode 140 . Photoelectrode 120. In this state, the dark solution 130 is distributed in the space between the light-transmitting electrode 120 and the suspended portion 143 of the porous electrode 140 , so that the ambient light entering the display device 10 from outside the display device 10 first penetrates the light-transmitting electrode 120 and is then absorbed by the display device 10 . The dark solution 130 absorbs, so the sub-pixel PX1 appears dark, that is to say, the sub-pixel PX1 is in a dark state at this time.

Referring to FIG. 1C , when electrically opposite voltages, for example, are applied to the light-transmitting electrode 120 and the porous electrode 140 , the light-transmitting electrode 120 and the porous electrode 140 will attract each other, so that the suspended portion 143 of the porous electrode 140 is attached to the light-transmitting electrode. 120. In this state, there is almost no dark solution 130 between the light-transmitting electrode 120 and the porous electrode 140 , or only a very small amount of dark solution 130 exists, so that the ambient light entering the display device 10 from outside the display device 10 can pass through the transparent light. The electrode 120 is then reflected by the suspended portion 143 of the porous electrode 140, and at this time, the sub-pixel PX1 is in a bright state.

In this embodiment, the suspended portion 143 of the porous electrode 140 may be a conductive film with good ductility and high reflectivity, and its material may include silver (Ag), aluminum (Al), alloys thereof, or other appropriate materials. The suspension part 143 may have a thin thickness. For example, the thickness of the suspension part 143 may be between 0.5 μm and 2 μm, such as 0.6 μm, 1 μm or 1.5 μm, to facilitate the suspension part 143 to move away from or close to the transparent part. The photoelectrode 120 is deformed during the process. In addition, the fixed portions 141 and 142 of the porous electrode 140 only need to be able to fix or electrically connect the suspended portion 143 to the substrate 110 , and they may or may not have ductility or high reflectivity. Therefore, the materials of the fixed parts 141 and 142 and the suspended part 143 may be the same or different.

When the suspended portion 143 of the porous electrode 140 is attached to the light-transmitting electrode 120, the dark solution 130 between the light-transmitting electrode 120 and the suspended portion 143 of the porous electrode 140 will be driven away. In order to facilitate the flow out of the dark solution 130, the suspended part 143 of the porous electrode 140 may have multiple holes, and the multiple holes of the suspended part 143 may be regularly arranged, but are not limited to this. In some embodiments, the plurality of holes of the suspension portion 143 may be arranged irregularly. In addition, the shape of the holes of the suspension part 143 is not particularly limited, and may have a regular shape or an irregular shape.

For example, please refer to FIG. 2A , which is a schematic top view of the suspended portion 143A of the porous electrode 140A according to an embodiment of the present invention. In this embodiment, the suspended part 143A may have a plurality of circular openings O1 arranged in a matrix.

FIG. 2B is a schematic top view of the suspended portion 143B of the porous electrode 140B according to an embodiment of the present invention. Referring to FIG. 2B , in this embodiment, the suspended part 143B may have a plurality of square openings O2 arranged in a matrix.

FIG. 2C is a schematic top view of the suspended portion 143C of the porous electrode 140C according to an embodiment of the present invention. Please refer to FIG. 2C . In this embodiment, the floating part 143C may have a plurality of star-shaped openings O3 arranged in a matrix.

FIG. 2D is a schematic top view of the suspended portion 143D of the porous electrode 140D according to an embodiment of the present invention. Please refer to FIG. 2D . In this embodiment, the suspended portion 143D may have a plurality of circular openings O4 arranged in a matrix, and the openings O4 in adjacent rows or columns are staggered from each other.

Please refer to FIG. 1B . In this embodiment, the display device 10 may further include a dielectric layer IL1 . The dielectric layer IL1 is located between the light-transmitting electrode 120 and the dark solution 130 , and the dielectric layer IL1 may cover the light-transmitting electrode 120 . surface to prevent the dark solution 130 or impurities (such as dyes) in the dark solution 130 from eroding or adhering to the light-transmitting electrode 120 . In addition, the thickness of the dielectric layer IL1 should be as thin as possible to avoid weakening the light-transmitting electrode 120 when opposite voltages are applied to the light-transmitting electrode 120 and the porous electrode 140 so that the floating portion 143 of the porous electrode 140 is attached to the light-transmitting electrode 120 Electrostatic attraction to the floating part 143.

In this embodiment, the display device 10 may further include a color conversion layer 150 as needed. The color conversion layer 150 may be disposed between the light-transmitting cover 160 and the light-transmitting electrode 120 , and the color conversion layer 150 may be disposed between the light-transmitting electrode 120 and the color conversion layer 150 . An insulating layer IL2 can also be provided between them to avoid unnecessary electrical connections.

For example, the color conversion layer 150 may include a plurality of color filter structures 151 and a plurality of light shielding structures 152, and the orthographic projection of the color filter structures 151 on the substrate 110 may overlap the orthographic projection of the porous electrode 140 on the substrate 110. The light-shielding structure 152 can be used to define the formation position of the color filter structure 151. For example, the light-shielding structure 152 can have an opening, and the color filter structure 151 can be located in the opening of the light-shielding structure 152. In other words, the light-shielding structure 152 may be located between the color filter structures 151 to improve color contrast. In addition, the light-shielding structure 152 can also overlap the portion where the porous electrode 140 is connected to the substrate 110. For example, the light-shielding structure 152 can overlap the fixing portion 141 or the fixing portion 142 of the porous electrode 140 to avoid reflection by the fixing portions 141 and 142 of the porous electrode 140. The light affects the display effect of the display device 10 .

The color filter structure 151 can be a red filter structure, a green filter structure or a blue filter structure, so that the light passing through the color filter structure 151 can have a corresponding color. In some embodiments, the color filter structure 151 may include phosphors, quantum dots, or similar wavelength conversion materials. In this way, when the sub-pixels PXs are in the bright state, the light reflected by the suspended portion 143 of the porous electrode 140 can be converted into light of different colors by the color conversion layer 150, so that the display device 10 can provide a full-color display effect. .

FIG. 3A is a schematic cross-sectional view of the sub-pixels of the display device 30 in a dark state according to an embodiment of the present invention. FIG. 3B is a schematic cross-sectional view of the sub-pixels of the display device 30 in a bright state. The display device 30 includes a stacked substrate 110 and a light-transmitting cover 160, a plurality of sub-pixels located on the substrate 110, and a color conversion layer 150 located between the plurality of sub-pixels and the light-transmitting cover 160, and each sub-pixel is The element may include a light-transmitting electrode 120A, a dark solution 130, and a porous electrode 140. Compared with the display device 10 shown in FIG. 1B , the difference of the display device 30 shown in FIG. 3A is that the display device 30 further includes an optical film OP1. The optical film OP1 may be located between the light-transmitting electrode 120A and the color conversion layer 150. between, and the light-transmitting electrode 120A may be located between the optical film OP1 and the dark solution 130 .

Please refer to FIG. 3A. In this embodiment, the optical film OP1 may include a surface microstructure ML formed on its surface. The surface microstructure ML may be, for example, a microlens structure with a semicircular surface profile, and the light-transmitting electrode 120A may It is disposed on the surface of the surface microstructure ML and has the same semicircular surface profile as the surface microstructure ML. When the suspended part 143 of the porous electrode 140 is far away from the light-transmitting electrode 120A and the dark solution 130 exists between the light-transmitting electrode 120A and the suspended part 143 of the porous electrode 140, the dark solution 130 can destroy the interface between ambient light and the surface microstructure ML. Total reflection allows the ambient light to be absorbed by the dark solution 130, thereby causing the sub-pixels of the display device 30 to be in a dark state.

In addition, please refer to FIG. 3B . When the porous electrode 140 and the light-transmitting electrode 120A are attracted to each other, the floating portion 143 of the porous electrode 140 can deform and fit on the surface of the light-transmitting electrode 120A, so that the floating portion 143 also has the characteristics of the transparent electrode 140 and the transparent electrode 120A. Photoelectrode 120A has the same semicircular surface profile. In this case, the ambient light entering the display device 30 may be totally reflected at the interface between the surface microstructure ML and the floating part 143 , or may be reflected by the floating part 143 , thus causing the sub-pixels of the display device 30 to be in a bright state. In addition, the semicircular surface of the surface microstructure ML can also scatter reflected light, so that the display device 30 can provide a non-mirror display effect.

FIG. 4A is a schematic cross-sectional view of the sub-pixels of the display device 40 in a dark state according to an embodiment of the present invention. FIG. 4B is a schematic cross-sectional view of the sub-pixels of the display device 40 in a bright state. The display device 40 includes a stacked substrate 110A and a light-transmitting cover 160 , a plurality of sub-pixels located on the substrate 110A, a color conversion layer 150 located between the multiple sub-pixels and the light-transmitting cover 160 , and a plurality of sub-pixels located on the substrate 110A. The optical film OP2 between the pixel and the color conversion layer 150 is provided, and each sub-pixel may include a light-transmitting electrode 120B, a dark solution 130 and a porous electrode 140E. Compared with the display device 30 shown in FIG. 3A , the difference of the display device 40 shown in FIG. 4A is that the surface microstructure ML of the optical film OP2 completely overlaps the color filter structure 151 of the color conversion layer 150 , but does not The light-shielding structure 152 is completely overlapped; the light-transmitting electrode 120B is only disposed on the surface of the surface microstructure ML and is physically separated from each other; and the suspended portion 143E of the porous electrode 140E of the display device 40 is complementary to the surface profile shape of the light-transmitting electrode 120B.

For example, please refer to FIG. 4A . In this embodiment, since the light-transmitting electrode 120B has a downwardly convex surface shape, the suspended portion 143E of the porous electrode 140E may have a downwardly concave surface shape. In this way, please refer to FIG. 4B , when the floating portion 143E of the porous electrode 140E and the light-transmitting electrode 120B are attracted to each other, the floating portion 143E of the porous electrode 140E can be more easily attached to the surface of the light-transmitting electrode 120B.

In addition, the light-transmitting electrodes 120B of each sub-pixel can be physically and electrically separated from each other. Therefore, different voltages can be applied to the light-transmitting electrodes 120B during operation. At the same time, the porous electrodes 140E of each sub-pixel can be applied with the same voltage during operation, or the porous electrodes 140E of each sub-pixel can be electrically connected to the same voltage source, or the porous electrodes 140E can be electrically connected to each other. For example, in this embodiment, the porous electrode 140E can be electrically connected to the common electrode line on the substrate 110A through the traces on the substrate 110A and have the same voltage. In this way, the attraction or repulsion between the light-transmitting electrode 120B and the porous electrode 140E can also be controlled by controlling the voltage of the light-transmitting electrode 120B, thereby controlling the relationship between the dark state and the bright state of the sub-pixels of the display device 40. switch.

To sum up, the display device of the present invention controls the attachment or separation between the light-transmitting electrode and the porous electrode by controlling the relative voltage of the light-transmitting electrode and/or the porous electrode, so as to switch the bright state and the bright state of each sub-pixel. Dark state, and there is no need for charged particles in the dark solution, so problems caused by the use of charged particles can be eliminated, thereby improving the reliability of the display device.

Although the present invention has been disclosed above through embodiments, they are not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some modifications and modifications without departing from the spirit and scope of the present invention. Therefore, The protection scope of the present invention shall be determined by the appended patent application scope.

10, 30, 40: display device 110, 110A: substrate 111: Bottom plate 112:Active components 112C: Channel layer 112D: drain 112G: Gate 112S: Source 120, 120A, 120B: Translucent electrode 130:Dark solution 140, 140A, 140B, 140C, 140D, 140E: porous electrode 141, 142: Fixed part 143, 143A, 143B, 143C, 143D, 143E: suspension part 150: Color conversion layer 151: Color filter structure 152:Light-shielding structure 160: Translucent cover A-A’: hatch line CS: conductive structure DC: driving element GI: Gate insulation layer IL1: dielectric layer IL2: Insulating layer ML: surface microstructure O1, O2, O3, O4: opening OP1, OP2: optical film PL: flat layer PX1, PXs: sub-pixels VA: through hole

FIG. 1A is a schematic top view of a display device 10 according to an embodiment of the present invention. FIG. 1B is a schematic cross-sectional view taken along the cross-sectional line A-A' of FIG. 1A , showing that the sub-pixel PX1 of the display device 10 is in a dark state. FIG. 1C is a schematic cross-sectional view of the sub-pixel PX1 of the display device 10 in a bright state. FIG. 2A is a schematic top view of the suspended portion 143A of the porous electrode 140A according to an embodiment of the present invention. FIG. 2B is a schematic top view of the suspended portion 143B of the porous electrode 140B according to an embodiment of the present invention. FIG. 2C is a schematic top view of the suspended portion 143C of the porous electrode 140C according to an embodiment of the present invention. FIG. 2D is a schematic top view of the suspended portion 143D of the porous electrode 140D according to an embodiment of the present invention. FIG. 3A is a schematic cross-sectional view of the sub-pixels of the display device 30 in a dark state according to an embodiment of the present invention. FIG. 3B is a schematic cross-sectional view of the sub-pixels of the display device 30 in a bright state. FIG. 4A is a schematic cross-sectional view of the sub-pixels of the display device 40 in a dark state according to an embodiment of the present invention. FIG. 4B is a schematic cross-sectional view of the sub-pixels of the display device 40 in a bright state.

10:Display device

110:Substrate

111: Bottom plate

112:Active components

112C: Channel layer

112D: drain

112G: Gate

112S: Source

120: Translucent electrode

130:Dark solution

140:Porous electrode

141, 142: Fixed part

143: Levitation Department

150: Color conversion layer

151: Color filter structure

152:Light-shielding structure

160: Translucent cover

CS: conductive structure

GI: Gate insulation layer

IL1: dielectric layer

IL2: Insulating layer

PL: flat layer

VA: through hole

Claims (11)

A display device including: substrate; a light-transmitting cover plate stacked on the substrate; A light-transmitting electrode located between the light-transmitting cover plate and the substrate; Dark solution, located between the light-transmitting electrode and the substrate; and A plurality of porous electrodes are located on the substrate and in the dark solution, The porous electrode has a surface profile shape complementary to that of the light-transmitting electrode. The display device of claim 1, wherein the porous electrode is malleable. The display device according to claim 1, wherein the porous electrode is made of silver or aluminum. The display device according to claim 1, wherein the thickness of the porous electrode is between 0.5 μm and 2 μm. The display device according to claim 1, wherein the holes of the porous electrode are regularly arranged. The display device according to claim 1, further comprising a dielectric layer located between the light-transmitting electrode and the dark solution. The display device according to claim 1, further comprising an optical film, wherein the light-transmitting electrode is located between the optical film and the dark solution. The display device of claim 7, wherein the optical film includes a surface microstructure, and the light-transmitting electrode is located on a surface of the surface microstructure. The display device according to claim 1, further comprising a color conversion layer, and the color conversion layer is located between the light-transmitting cover plate and the light-transmitting electrode. The display device of claim 9, wherein the color conversion layer includes a plurality of color filter structures, and the orthographic projection of the color filter structure on the substrate overlaps the orthographic projection of the porous electrode on the substrate. . The display device of claim 10, wherein the color conversion layer further includes a plurality of light-shielding structures, the light-shielding structures are located between the color filter structures and overlap where the porous electrode is connected to the substrate.

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