CN117471807A - Electronic paper display and preparation method thereof - Google Patents

Abstract

The application discloses electronic paper display and preparation method thereof, this display includes a plurality of pixel units, the pixel unit has crossing first direction and second direction, the pixel unit includes particle groove and first base plate, the inslot of particle is dispersed with the electrophoresis particle, first base plate is connected with the particle groove along first direction, first base plate includes first thin film transistor and second thin film transistor, first thin film transistor is used for providing the electric field that drives the electrophoresis particle along first direction, second thin film transistor is insulating with first thin film transistor, and be used for providing the electric field that drives the electrophoresis particle along the second direction and remove. According to the display device, the first thin film transistor provides an electric field to drive the electrophoretic particles to move along a first direction so as to realize reflective display, and the second thin film transistor provides an electric field to drive the electrophoretic particles to move along a second direction so as to realize transmissive display; thereby freely switching the reflective and transmissive display according to the ambient light to achieve a display effect of improving brightness and contrast.

Description

Electronic paper display and preparation method thereof

Technical Field

The application belongs to the technical field of display, and particularly relates to an electronic paper display and a preparation method thereof.

Background

With the popularity of displays and rapid network development, electronic paper displays for energy conservation and eye protection are selected by more people in the aspect of child education, the education machines occupy increased share in the market, the price is relatively high, and the profits are larger in the panel industry. The existing electronic paper mainly comprises two structures of a capsule and a micro-cup, the main display flow is black-white electrophoretic particles, the black-white picture is displayed by reflecting and absorbing a light source, and color electrophoretic particles or a filter layer is added to realize the effect of the color electronic paper, but the existing display adopts particle reflection for displaying, so that the brightness and the contrast of the display are limited.

Disclosure of Invention

The invention aims to: the embodiment of the application provides an electronic paper display, which aims to solve the problem that the brightness and contrast of the existing electronic paper display are limited due to reflection display; another object of the embodiments of the present application is to provide a method for manufacturing an electronic paper display.

The technical scheme is as follows: an electronic paper display described in the embodiments of the present application includes: a plurality of pixel cells having intersecting first and second directions, the pixel cells comprising:

a particle tank in which electrophoretic particles are dispersed;

a first substrate connected to the particle tank, the first substrate comprising:

a first thin film transistor for providing an electric field driving the electrophoretic particles to move in the first direction;

and a second thin film transistor insulated from the first thin film transistor and configured to provide an electric field driving the electrophoretic particles to move in the second direction.

In some embodiments, the pixel cell further comprises: the second substrate is arranged on one side of the particle groove, which is away from the first substrate, and comprises a common electrode;

the first substrate includes a pixel electrode facing the common electrode in the first direction;

the source electrode of the first thin film transistor is connected with the pixel electrode, and an electric field driving the electrophoretic particles to move along the first direction is formed between the pixel electrode and the common electrode by the first thin film transistor.

In some embodiments, the particle tank comprises:

a side wall, wherein one end of the side wall is connected with the first substrate along the first direction, and the other end of the side wall is connected with the second substrate;

a first electrode attached to the sidewall;

the second electrode is attached to the side wall and is opposite to the first electrode along the second direction, the second electrode is connected with the source electrode of the second thin film transistor, and the second thin film transistor drives the second electrode and the first electrode to form an electric field for driving the electrophoretic particles to move along the second direction.

In some embodiments, the sidewall is a black mask.

In some embodiments, the first electrode and/or the common electrode is a full-face electrode.

In some embodiments, the second electrode and the pixel electrode are a single electrode.

In some embodiments, the first electrode and the second electrode are both transparent conductive thin film electrodes.

In some embodiments, the first substrate and the second substrate are both transparent substrates.

In some embodiments, the electrophoretic particles comprise black particles and white particles, the black particles being electrically opposite to the white particles.

Correspondingly, the preparation method of the electronic paper display, disclosed by the embodiment of the application, comprises the following steps:

providing a bottom plate;

forming a first thin film transistor and a second thin film transistor on one side of the bottom plate;

forming a pixel electrode on one side of the first thin film transistor and one side of the second thin film transistor, which are away from the bottom plate, and connecting the pixel electrode with a source electrode of the first thin film transistor to form a first substrate;

forming a particle groove on one side of the first substrate;

forming a first electrode and a second electrode on the inner sides of two opposite side walls of the particle groove, and connecting the second electrode with a source electrode of a second thin film transistor;

injecting electrophoretic particles into the particle bath in which the first electrode and the second electrode are formed;

and forming a second substrate on one side of the particle groove into which the electrophoretic particles are injected, which is far away from the first substrate, wherein the second substrate comprises a common electrode.

The beneficial effects are that: compared with the prior art, the electronic paper display of the embodiment of the application comprises: a plurality of pixel cells, the pixel cells having intersecting first and second directions, the pixel cells comprising: particle groove and first base plate, the inslot of particle has the electrophoresis particle, and first base plate is connected and overlaps in the below in particle groove along first direction with particle groove, and first base plate includes: the first thin film transistor is used for providing an electric field for driving the electrophoretic particles to move along a first direction, and the second thin film transistor is insulated from the first thin film transistor and used for providing an electric field for driving the electrophoretic particles to move along a second direction. According to the display device, the first thin film transistor provides an electric field to drive the electrophoretic particles to move along a first direction so as to realize reflective display, and the second thin film transistor provides an electric field to drive the electrophoretic particles to move along a second direction so as to realize transmissive display; because the pixel units respectively comprise the first thin film transistor and the second thin film transistor, the electronic paper display can achieve free combination and switching of transmission and reflection display modes through electric field switching, and the display effect of improving brightness and contrast is achieved.

Compared with the prior art, the preparation method of the electronic paper display comprises the following steps: providing a bottom plate, and forming a first thin film transistor and a second thin film transistor on one side of the bottom plate; forming a pixel electrode on one side of the first thin film transistor and one side of the second thin film transistor, which are away from the bottom plate, and connecting the pixel electrode with a source electrode of the first thin film transistor to form a first substrate; forming a particle groove on a first substrate, forming a first electrode and a second electrode on the inner sides of two opposite side walls of the particle groove, and connecting the second electrode with a source electrode of a second thin film transistor; injecting electrophoresis particles into the particle groove in which the first electrode and the second electrode are formed; a second substrate is formed on a side of the particle groove into which the electrophoretic particles are injected, which is away from the first substrate, and the second substrate includes a common electrode. The electronic paper display prepared by the method can control the electric field in the first direction by using the first thin film transistor, and control the electric field in the second direction by using the second thin film transistor, so that the switching and free combination of the reflection mode and the transmission mode of the display are realized, and the display effect of improving the brightness and the contrast is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a partial structure of an electronic paper display according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a single pixel of an electronic paper display according to an embodiment of the present application;

FIG. 3 is a schematic state diagram of a reflective display mode of an electronic paper display according to an embodiment of the present application;

FIG. 4 is a schematic state diagram of a perspective display mode of an electronic paper display according to an embodiment of the present application;

FIG. 5 is a schematic diagram showing a reflective bright state of an electronic paper display according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a reflective dark state display of an electronic paper display according to an embodiment of the present application;

fig. 7 is a schematic diagram showing a perspective bright state display of an electronic paper display according to an embodiment of the present application.

Reference numerals: 100. a pixel unit; 110. a particle tank; 111. a sidewall; 112. a first electrode; 113. a second electrode; 120. electrophoresis particles; 121. black particles; 122. white particles; 130. a first substrate; 131. a first thin film transistor; 132. a second thin film transistor; 133. a pixel electrode; 134. a bottom plate; 140. a second substrate; 141. a common electrode; x, a first direction; y, second direction.

Detailed Description

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. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

In the description of the present application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, and at least one means may be one, two or more, unless explicitly defined otherwise. In the description of the present application, "perpendicular" means completely perpendicular at 90 ° or almost completely perpendicular, for example, as perpendicular in the range of 80 ° to 100 °, and similarly, "parallel" means completely parallel or almost completely parallel, for example, as parallel in the range of 10 ° of complete parallel.

It should be further noted that, in the drawings of the present application, an arrow denoted by X is used to indicate a first direction X, and an arrow denoted by Y is used to indicate a second direction Y, where in the embodiment of the present application, the first direction X is a direction of the first substrate 130 towards the particle slot 110, the second direction Y is a direction of the first electrode 112 towards the second electrode 113, and the first direction X and the second direction Y are introduced to facilitate description of a structural positional relationship of each component of the pixel unit 100 of the electronic paper display, so as to facilitate understanding of a structure thereof.

The applicant notes that electronic paper displays are currently mainly of the capsule and micro-cup structure. And the display is realized by utilizing particle reflection absorption light source. But display brightness and contrast are limited.

In view of the foregoing, an embodiment of the present application provides an electronic paper display for solving the above-mentioned problems.

As shown in fig. 1, an electronic paper display according to an embodiment of the present application includes: a plurality of pixel units 100, the pixel units 100 having a first direction X and a second direction Y intersecting each other, the pixel units 100 comprising: particle bath 110 and first substrate 130, particle bath 110 has electrophoretic particles 120 dispersed therein, first substrate 130 is connected to particle bath 110 and stacked below particle bath 110 in first direction X, first substrate 130 includes: the first thin film transistor 131 and the second thin film transistor 132, the first thin film transistor 131 is used for providing an electric field driving the electrophoretic particles 120 to move along the first direction X, and the second thin film transistor 132 is insulated from the first thin film transistor 131 and is used for providing an electric field driving the electrophoretic particles 120 to move along the second direction Y.

In the present embodiment, the movement of the electrophoretic particles 120 in the first direction X is achieved by providing the first thin film transistor 131 to control the electric field along the first direction X within the pixel unit 100. The movement of the electrophoretic particles 120 in the second direction Y is achieved by providing the second thin film transistor 132 to control the electric field along the second direction Y within the pixel unit 100 years.

In a specific embodiment, the first direction X may be a vertical direction and the second direction Y may be a horizontal direction. Specifically, when the reflective display needs to be implemented, the second thin film transistor 132 does not work, the first thin film transistor 131 works, and the electric field in the first direction X is driven to drive the electrophoretic particles 120 to move along the first direction X in the electric field in the first direction X, and at this time, a part of the electrophoretic particles 120 is located at the upper part, so that the reflection is implemented. When the transmissive display is required, the first thin film transistor 131 does not operate, and the second thin film transistor 132 operates to drive the electric field in the second direction Y to drive the electrophoretic particles 120 to move along the second direction Y in the electric field in the second direction Y. At this time, the electrophoretic particles 120 are on the side wall 111 of the particle groove 110 in the second direction Y with the particle groove 110 left in the middle, and are not shielded in the first direction X, thus realizing the transmission in the first direction X.

In some embodiments, the pixel unit 100 further includes a second substrate 140, the second substrate 140 being disposed at a side of the particle groove 110 facing away from the first substrate 130, the second substrate 140 including a common electrode 141; the first substrate 130 includes a pixel electrode 133, and the pixel electrode 133 faces the common electrode 141 along the first direction X; the source of the first thin film transistor 131 is connected to the pixel electrode 133, and the first thin film transistor 131 drives an electric field between the pixel electrode 133 and the common electrode 141 to drive the electrophoretic particles 120 to move in the first direction X.

In this embodiment, by providing the common electrode 141 and the pixel electrode 133, an electric field along the first direction X is provided to the pixel unit 100, and meanwhile, the first thin film transistor 131 is connected to the pixel electrode 133, so that the first thin film transistor 131 is used to control the pixel electrode 133 to be turned on or off, so as to achieve the effect of controlling the electrophoretic particles 120 to move along the first direction X.

In some embodiments, particle tank 110 includes: a sidewall 111, a first electrode 112, and a second electrode 113; along the first direction X, one end of the sidewall 111 is connected to the first substrate 130, and the other end of the sidewall 111 is connected to the second substrate 140; the first electrode 112 is attached to the sidewall 111; the second electrode 113 is attached to the sidewall 111 and is opposite to the first electrode 112 along the second direction Y, the second electrode 113 is connected to the source of the second thin film transistor 132, and the second thin film transistor 132 drives the second electrode 113 and the first electrode 112 to form an electric field between them, which drives the electrophoretic particles 120 to move along the second direction Y.

Specifically, in the embodiment of the present application, the sidewall 111, the first substrate 130 and the second substrate 140 form a closed space for accommodating the electrophoretic fluid and the electrophoretic particles 120, and the electrophoretic particles 120 are controlled by different electric fields to move in different directions in the closed space. Further, the second substrate 140 is used to cover the particle groove 110 at the connection between the side wall 111 and the second substrate 140, and specifically, a sealant can be applied at the connection between the side wall 111 and the second substrate 140 to achieve a better sealing connection effect. According to the method, the first electrode 112 and the second electrode 113 are respectively arranged on the opposite side surfaces of the side wall 111 along the second direction Y, so that an electric field along the second direction Y is provided, meanwhile, the second thin film transistor 132 is arranged to be connected with the second electrode 113, and the second thin film transistor 132 is used for controlling the on-off of the second electrode 113, so that the effect of controlling the electrophoretic particles 120 to move along the second direction Y is achieved.

In the embodiment of the present application, the first direction X and the second direction Y intersect, and further, the first direction X and the second direction Y are perpendicular, and at this time, the corresponding electric field direction in the first direction X and the corresponding electric field direction in the second direction Y are perpendicular. By controlling the switching of the first thin film transistor 131, the switching of the electric field in the first direction X and the electric field in the second direction Y is achieved, and the direction in which the electrophoretic particles 120 move is perpendicular. Specifically, when the first electric field works, the corresponding pixel unit 100 enters the reflective display mode, and when the second electric field works, the corresponding pixel unit 100 enters the transmissive display mode.

In some embodiments, the sidewall 111 is a black mask.

In this embodiment of the present application, the side wall 111 is provided as a black light shielding body, which mainly has the effect of realizing the separation of each pixel, avoiding the transmission and reflection of light from the side wall 111, effectively absorbing the external interference light, and ensuring the display effect of each pixel unit 100. Specifically, the black light-shielding body of the present application may be a black matrix.

In some embodiments, the first electrode 112 and/or the common electrode 141 are full-face electrodes.

In the embodiment of the present application, the common electrode 141 is disposed on the second substrate 140, and the second substrate 140 may cover the plurality of particle grooves 110, not just one particle groove 110. Correspondingly, the first electrode 112 can be connected with a plurality of particle slots 110 in series to realize unified power supply, so that wiring can be effectively reduced. The common electrode 141 is selectively operated with the first electrode 112, and the common electrode 141 is operated when the pixel unit 100 performs the reflective display and the first electrode 112 is operated when the pixel unit 100 performs the transmissive display.

In some embodiments, the second electrode 113 and the pixel electrode 133 are a single electrode.

In this embodiment, the second electrode 113 and the pixel electrode 133 are single electrodes, and at this time, separate control of each pixel can be achieved, that is, the single pixel can be controlled to perform reflective display or transmissive display, and the adjacent pixel units 100 can achieve different display states. As shown in particular in fig. 4.

In some embodiments, the first electrode 112 and the second electrode 113 are transparent conductive thin film electrodes.

In this embodiment of the present application, by setting the first electrode 112 and the second electrode 113 to be transparent conductive thin film electrodes, light weight transmission can be achieved, so that the side wall 111 is convenient for absorbing light interference light. More specifically, the first electrode 112 and the second electrode 113 may be Indium Tin Oxide (ITO).

In some embodiments, the first substrate 130 and the second substrate 140 are both transparent substrates.

In the embodiment of the present application, since transmission needs to be achieved, it is necessary to provide that both the first substrate 130 and the second substrate 140 are transparent substrates, so that background light can be transmitted during transmission display.

Referring to fig. 3-7 in combination, in some embodiments, the electrophoretic particles 120 include black particles 121 and white particles 122, and the black particles 121 are electrically opposite to the white particles 122.

The black particles 121 and the white particles 122 are disposed to be opposite in electrical property, meaning that the black particles 121 and the white particles 122 each carry different charges. In the embodiment of the present application, the black particles 121 may be positively charged, and the white particles 122 may be negatively charged, so that the moving directions of the black particles 121 and the white particles 122 may be controlled according to the difference of the electric field directions. Reference is made in particular to fig. 5-7.

According to the electronic paper display, the optimal display mode can be selected according to the difference of the ambient light and the background light through detection of the ambient light, so that the display mode is switched correspondingly, the brightness and the contrast of the electronic paper display are improved, the application range under the condition of the background light is enlarged, and the electronic paper display has the advantages of low power consumption, energy conservation and eye protection.

Specifically, when the front ambient light is brighter, the reflective display is adopted, and when the background ambient light is brighter, the display is switched to the transmissive display.

When reflective display is adopted, the second thin film transistor 132 is controlled to be turned off, the first thin film transistor 131 is controlled to be turned on, and then the pixel electrode 133 is electrified, and at this time, the corresponding electrophoretic particles 120 move in the electric field between the pixel electrode 133 and the common electrode 141. When the pixel electrode 133 is negatively charged and the common electrode 141 is positively charged, the white particles 122 move toward the common electrode 141, the black particles 121 move toward the pixel electrode 133, and the final state is as shown in fig. 5, and the ambient light is reflected by the white particles 122, and the reflective bright state display is presented. When the pixel electrode 133 is positively charged and the common electrode 141 is negatively charged, the white particles 122 move toward the pixel electrode 133 and the black particles 121 move toward the common electrode 141, and the final state is as shown in fig. 6, and the black particles 121 absorb the ambient light correspondingly, and the reflective dark state display is presented. The final presented results are shown in black and white in fig. 3.

When the transmission display is adopted, the first thin film transistor 131 is controlled to be closed, the second thin film transistor 132 is controlled to be opened, and then the second electrode 113 is electrified, and at the moment, the corresponding electrophoretic particles 120 move in an electric field between the first electrode 112 and the second electrode 113. If the first electrode 112 is controlled to be positively charged and the second electrode 113 is controlled to be negatively charged, the white particles 122 move to the first electrode 112, the black particles 121 move to the second electrode 113, or the first electrode 112 is controlled to be negatively charged and the second electrode 113 is controlled to be positively charged, the white particles 122 move to the second electrode 113, and the black particles 121 move to the first electrode 112, so that no electrophoretic particles 120 exist between the first substrate 130 and the second substrate 140 in the first direction X, and background light is directly transmitted. See in particular fig. 7. When the electronic paper adopts the transmission display mode, the final display state is shown as transparent and black in fig. 4. The charged polarities of the first electrode 112 and the second electrode 113 are selected, mainly referring to the display state of the pixel cell 100 adjacent to the second electrode 113, as shown in fig. 4, when the pixel cell 100 adjacent to the first electrode 112 displays black, the first electrode 112 is negatively charged, and when the pixel cell 100 adjacent to the second electrode 113 displays black, the second electrode 113 is negatively charged.

Accordingly, a method for manufacturing an electronic paper display according to an embodiment of the present application includes: providing a bottom plate 134, forming a first thin film transistor 131 and a second thin film transistor 132 on one side of the bottom plate 134; forming a pixel electrode 133 on a side of the first thin film transistor 131 and the second thin film transistor 132 facing away from the bottom plate 134, and connecting the pixel electrode 133 with a source electrode of the first thin film transistor 131 to form a first substrate 130; forming a particle groove 110 on the first substrate 130; forming a first electrode 112 and a second electrode 113 on inner sides of opposite side walls 111 of the particle groove 110, and connecting the second electrode 113 to a source of the second thin film transistor 132; injecting electrophoretic particles 120 into the particle bath 110 in which the first electrode 112 and the second electrode 113 are formed; a second substrate 140 is formed at a side of the particle groove 110 into which the electrophoretic particles 120 are injected, which is remote from the first substrate 130, and the second substrate 140 includes a common electrode 141.

In this embodiment of the present application, the first thin film transistor 131 and the second thin film transistor 132 are formed, and may be disposed on the same layer, the first insulating layer is formed on the thin film transistor, and correspondingly, a first hole is formed on the first insulating layer at a position opposite to the source electrode of the first thin film transistor 131, a second hole is formed on the second insulating layer at a position opposite to the source electrode of the second thin film transistor 132, then the pixel electrode 133 is formed on the first insulating layer, and the pixel electrode 133 is connected with the source electrode of the first thin film transistor 131 through the first hole, and then the second insulating layer is formed on the pixel electrode 133 to cover the pixel electrode 133, and simultaneously the second hole continuously penetrates through the second insulating layer. The particle groove 110 is formed on the second insulating layer, mainly by forming the sidewall 111, and performing ITO sputtering on the opposite side of the sidewall 111, forming the first electrode 112 and the second electrode 113 bonded to the sidewall 111, and connecting the second electrode 113 to the source of the second thin film transistor 132 through the second cavity, thereby forming the complete particle groove 110. The electrophoretic particles 120 are injected into the particle bath 110, and then the second substrate 140 is covered, and the second substrate 140 includes the common electrode 141, thereby sealing the particle bath 110.

The electronic paper display prepared by the method of the embodiment of the application can control the on-off of the pixel electrode 133 by using the first thin film transistor 131, so as to control the electric field between the pixel electrode 133 and the common electrode 141, and control the on-off of the second electrode 113 by using the second thin film transistor 132, so as to control the electric field between the first electrode 112 and the second electrode 113. The switching of the electric field is achieved, thereby achieving the switching of the transmissive and reflective display.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The foregoing describes in detail an electronic paper display and a method for manufacturing the same, which are provided in the embodiments of the present application, and applies specific examples to illustrate principles and embodiments of the present application, where the foregoing examples are only used to help understand technical solutions and core ideas of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. An electronic paper display, comprising: a plurality of pixel units, wherein the pixel units are provided with a first direction and a second direction which are intersected, the pixel units comprise particle grooves, and electrophoresis particles are dispersed in the particle grooves; the particle tank is connected with a first substrate, which comprises:

a first thin film transistor for providing an electric field driving the electrophoretic particles to move in the first direction;

and a second thin film transistor insulated from the first thin film transistor for providing an electric field driving the electrophoretic particles to move along the second direction.

2. The electronic paper display of claim 1, wherein the pixel unit further comprises: a second substrate, the second substrate cover Feng Zaisuo having a particle groove facing away from the first substrate, the second substrate including a common electrode;

the first substrate includes a pixel electrode facing the common electrode in the first direction;

the source electrode of the first thin film transistor is connected with the pixel electrode, and an electric field driving the electrophoretic particles to move along the first direction is formed between the pixel electrode and the common electrode by the first thin film transistor.

3. The electronic paper display of claim 2, wherein the particle groove comprises:

a side wall, wherein one end of the side wall is connected with the first substrate along the first direction, and the other end of the side wall is connected with the second substrate;

a first electrode attached to the sidewall;

the second electrode is attached to the side wall and is opposite to the first electrode along the second direction, the second electrode is connected with the source electrode of the second thin film transistor, and the second thin film transistor drives the second electrode and the first electrode to form an electric field for driving the electrophoretic particles to move along the second direction.

4. The electronic paper display of claim 3, wherein the side wall is a black mask.

5. An electronic paper display according to claim 3, characterized in that the first electrode and/or the common electrode is a full-face electrode.

6. The electronic paper display of claim 3, wherein the second electrode and the pixel electrode are a single electrode.

7. The electronic paper display of claim 3, wherein the first electrode and the second electrode are transparent conductive thin film electrodes.

8. The electronic paper display of claim 2, wherein the first substrate and the second substrate are transparent substrates.

9. The electronic paper display of claim 1, wherein the electrophoretic particles comprise black particles and white particles, the black particles being electrically opposite to the white particles.

10. A method for manufacturing an electronic paper display, comprising:

providing a bottom plate;

forming a first thin film transistor and a second thin film transistor on one side of the bottom plate;

forming a pixel electrode on one side of the first thin film transistor and one side of the second thin film transistor, which are away from the bottom plate, and connecting the pixel electrode with a source electrode of the first thin film transistor to form a first substrate;

forming a particle groove on one side of the first substrate;

forming a first electrode and a second electrode on the inner sides of two opposite side walls of the particle groove, and connecting the second electrode with a source electrode of a second thin film transistor;

injecting electrophoretic particles into the particle bath in which the first electrode and the second electrode are formed;

and forming a second substrate on one side of the particle groove into which the electrophoretic particles are injected, which is far away from the first substrate, wherein the second substrate comprises a common electrode.