CN218332238U - Electronic paper display screen and display device - Google Patents

Abstract

The application provides an electronic paper display screen and display device, electronic paper display screen are including relative first base plate and the second base plate that sets up, first base plate orientation one side of second base plate is equipped with common electrode, the second base plate orientation one side of first base plate is equipped with a plurality of pixel electrode, each pixel electrode with be equipped with the pixel cell between the common electrode, the pixel cell includes a plurality of microcapsules, each all be equipped with the electric potential particle of two kinds of colours in the microcapsule, two kinds of colours the electric potential particle is black electric potential particle and first colour electric potential particle respectively, first colour is red, green or blue. The application solves the problems that the particle movement accuracy in the microcapsule of the existing electronic paper display device is not high and the display effect is influenced.

Description

Electronic paper display screen and display device

Technical Field

The application relates to the technical field of electronic paper, in particular to an electronic paper display screen and a display device.

Background

The electronic paper (E-paper) is a novel display material, is a bistable display technology based on the electrophoresis principle, has wide application, has superior performances of ultra-low energy consumption, thinness like paper, bending and book-like definition and the like, and has the working principle that: two layers of transparent films are provided with two kinds of grains with static electricity, the two kinds of grains are respectively provided with positive static electricity and negative static electricity, and the positions of the grains are moved by utilizing positive and negative electrodes arranged outside the films according to the principle of homopolar repulsion and heteropolar attraction, so that the grains are arranged into a character shape or a figure.

At present, most of electronic paper display devices can only display black and white, and color display is difficult to realize. Some electronic paper display devices are configured to simultaneously place at least three colors of positively charged particles in a microcapsule for color display, so that when the positively charged particles of one color move, the positively charged particles of other colors are blocked, and due to the influence of the particles on each other, the larger the number of the particles is, the larger the force for blocking the movement of the particles is, so that the accuracy of the movement of the positively charged particles of one color in the microcapsule is reduced, thereby affecting the display effect.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an electronic paper display screen and a display device, and potential particles of two colors, namely black potential particles and first color potential particles, are arranged in microcapsules of a pixel unit, so that the problems that the movement accuracy of particles in the microcapsules of the conventional electronic paper display device is not high, and the display effect is influenced are solved.

The utility model provides a so realize, an electronic paper display screen, including relative first base plate and the second base plate that sets up, first base plate orientation one side of second base plate is equipped with common electrode, the second base plate orientation one side of first base plate is equipped with a plurality of pixel electrode, each pixel electrode with be equipped with pixel element between the common electrode, pixel element includes a plurality of microcapsules, each all be equipped with the electric potential particle of two kinds of colours in the microcapsule, two kinds of colours the electric potential particle is black electric potential particle and first colour electric potential particle respectively, first colour is red, green or blue.

In one embodiment, the color of the pixel unit is the same as the color of the first color potential particles, and the pixel units are three, namely, a red pixel unit, a green pixel unit and a blue pixel unit.

In one embodiment, the pixel unit comprises a plurality of microcapsules which form a microcapsule film, and the microcapsule film is attached to the pixel electrode.

In one embodiment, the color of the microcapsule film is the same as the color of the pixel unit, and the microcapsule film has three colors, namely a red microcapsule film, a green microcapsule film and a blue microcapsule film; the red microcapsule film, the green microcapsule film and the blue microcapsule film are all attached to the corresponding pixel electrodes.

In one embodiment, the red microcapsule film, the green microcapsule film and the blue microcapsule film do not overlap each other in a forward projection on the second substrate.

In one embodiment, a plurality of data lines are disposed on the second substrate, and the data lines are configured to apply a constant first voltage to the pixel electrodes within a preset time period so as to form a threshold voltage between the pixel electrodes and the common electrode, where the threshold voltage is a voltage for driving potential particles to move in a direction approaching the first substrate; the pixel electrode corresponding to each pixel unit is respectively connected with different data lines.

In one embodiment, the electronic paper display screen further includes a plurality of driving chips, and each of the data lines is correspondingly connected to one of the driving chips.

In one embodiment, the number of the red microcapsule film, the green microcapsule film and the blue microcapsule film is plural, and the plural red microcapsule films, the plural green microcapsule films and the plural blue microcapsule films are all arranged along a first direction; the red microcapsule film, the green microcapsule film and the blue microcapsule film are sequentially arranged along a second direction, and the first direction and the second direction are perpendicular to each other.

In one embodiment, the microcapsules are spherical and have a diameter of 0.02 to 0.12mm.

The application provides an electronic paper display screen's beneficial effect lies in: compared with the prior art, each microcapsule in a plurality of microcapsules included in the pixel unit of the application is provided with potential particles of two colors, namely black potential particles and first color potential particles, so that the potential particles of one color are prevented from moving, namely the potential particles of the other color, the blocking force is obviously reduced, the accuracy of the movement of the potential particles is improved, and the display effect is improved.

The embodiment of the application further provides a display device, including the casing and as above-mentioned any embodiment the electronic paper display screen, the electronic paper display screen set up in the casing.

The application provides a display device's beneficial effect lies in: by adopting the electronic paper display screen, each microcapsule of a plurality of microcapsules included in the pixel unit of the electronic paper display screen is provided with the potential particles of two colors, namely the black potential particles and the first color potential particles, so that the potential particles of one color are prevented from moving, namely the potential particles of the other color, the blocking force is obviously reduced, the accuracy of the movement of the potential particles is improved, and the display effect is improved.

Drawings

Fig. 1 is a schematic structural diagram of an electronic paper display screen according to an embodiment of the present application;

fig. 2 is a cross-sectional structural view of an electronic paper display screen according to an embodiment of the present application;

fig. 3 is a schematic diagram illustrating different microcapsule films of an electronic paper display screen attached to a pixel electrode according to an embodiment of the present application;

fig. 4 is a schematic distribution diagram of data lines and driving chips of an electronic paper display screen according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a display device according to a second embodiment of the present application.

Reference numerals: 1. a first substrate; 10. a common electrode;

2. a second substrate; 20. a pixel electrode;

3. a pixel unit; 301. a red pixel unit; 3011. a red microcapsule film; 302. a green pixel unit; 3021. a green microcapsule film; 303. a blue pixel unit; 3031. a blue microcapsule film; 30. microcapsules; 31. black potential particles; 32. first color potential particles;

4. a data line;

5. a driving chip;

100. an electronic paper display screen; 200. a housing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

It should be noted that the same reference numerals are used to denote the same components or parts in the embodiments of the present application, and for the same parts in the embodiments of the present application, only one of the parts or parts may be given the reference numeral, and it should be understood that the reference numerals are also applicable to the other same parts or parts.

The embodiment of the application provides an electronic paper display screen and a display device, and solves the problems that the accuracy of movement of particles in microcapsules of an existing electronic paper display device is not high, and the display effect is influenced.

Example one

Referring to fig. 1-2, an electronic paper display screen provided in an embodiment of the present application includes a first substrate 1 and a second substrate 2 that are disposed opposite to each other, a common electrode 10 is disposed on a side of the first substrate 1 facing the second substrate 2, a plurality of pixel electrodes 20 are disposed on a side of the second substrate 2 facing the first substrate 1, a pixel unit 3 is disposed between each pixel electrode 20 and the common electrode 10, the pixel unit 3 includes a plurality of microcapsules 30, each microcapsule 30 has two color potential particles, and the two color potential particles are a black potential particle 31 and a first color potential particle 32.

Wherein the first color is red, green or blue. That is, the black potential particles 31 and the red potential particles may be provided in the microcapsule 30, the black potential particles 31 and the green potential particles may be provided, and the black potential particles 31 and the blue potential particles may be provided.

The pixel unit 3 of the conventional electronic paper display device includes a microcapsule 30 that contains potential particles of multiple colors at the same time, for example, black potential particles 31, red potential particles, green potential particles, and blue potential particles at the same time, so that when a potential particle of one color moves, potential particles of other three colors are blocked, while the microcapsule 30 in the present application is provided with black potential particles 31 and first color potential particles 32, which is equivalent to removing two potential particles of four colors in the microcapsule 30 in the prior art, and only the potential particles of two colors remain, obviously, so that a potential particle that blocks the potential particle of one color moves is a potential particle of another color, and the blocking force is obviously reduced, thereby improving the accuracy of the potential particle movement and improving the display effect.

As an example, 20 red potential particles, 20 green potential particles, 20 blue potential particles and 20 black potential particles 31 are simultaneously contained in the microcapsule 30 of the conventional electronic paper display device, 20 green potential particles and 20 blue potential particles are removed from the microcapsule 30 of the pixel unit 3 of the present application, only 20 red potential particles and 20 black potential particles 31 are retained, and when the red potential particles in the two move, 60 potential particles of other colors except the red potential particles in the microcapsule 30 of the conventional electronic paper display device hinder the movement of the red potential particles, and only 20 black potential particles 31 in the microcapsule 30 of the present application hinder the movement of the red potential particles, and it is obvious that the red potential particles in the microcapsule 30 of the present application are less hindered when moving, which is beneficial to the accurate movement of the red potential particles, thereby improving the effect of the pixel unit 3 for displaying red.

The potential particles may be referred to as electrophoretic particles, and refer to particles that move under the action of an electric field. Electrophoretic particles, mainly titanium dioxide particles, are dispersed in hydrocarbon oil to which black fuel, a surfactant, and a charge control agent for charging the particles are also added, and the mixture is disposed between parallel conductive plates, such as the pixel electrode 20 and the common electrode 10 shown in fig. 2.

In some embodiments, a transparent liquid is further provided in the microcapsule 30, and both the black potential particles 31 and the first color potential particles 32 can move in the transparent liquid. The transparent liquid is arranged in the microcapsule 30, so that the black potential particles 31 and the first color potential particles 32 can be in a suspended state in the transparent liquid, thereby reducing external force, such as the influence of gravity on the potential particles, further facilitating the movement of the black potential particles 31 and the first color potential particles 32, improving the response speed of the electronic paper display screen, and avoiding the problem of image sticking when the electronic paper display screen displays.

The transparent liquid in the present application may be the same as the transparent liquid in the microcapsule 30 or the microcups in the existing electronic paper display device. Illustratively, the transparent liquid may be tetrachloroethylene or xylene.

Referring to fig. 2, microcapsules 30 in the present application have a spherical shape, and the diameter D of the microcapsules 30 is 0.02 to 0.12mm. The potential particles contained in the microcapsule 30 are small, so that gaps formed between the particles become small, and when the potential particles move to a side close to the first substrate 1, the color displayed by the electronic paper display screen is more uniform, thereby effectively improving the display effect of the electronic paper display screen.

It should be noted that the first substrate 1 may include a first substrate, and the common electrode 10 is directly disposed on the first substrate, but of course, the first substrate 1 may include a first substrate and a protective film covering the first substrate, and the common electrode 10 is disposed on the protective film.

In order to meet the characteristics of thinning and flexibility of the display screen on the market, the first substrate 1 of the electronic paper display screen provided by the embodiment of the invention can be made of polymer. Organic polymer, for example materials such as polyimide, have the flexible characteristics of easily buckling, can be convenient for electronic paper display screen to realize flexible the buckling. Certainly, the first substrate 1 may also be made of a glass material, which is not described herein, and the material of the first substrate 1 may be adjusted according to actual needs. The second substrate 2 may be an array substrate, such as a glass substrate or a flexible polyimide substrate.

The first substrate, the protective film, and the common electrode 10 are all transparent, and the common electrode 10 may be made of ITO (indium tin oxide). The protection Film can be transparent PET (Polyester Film) Film, and the protection Film also can be polymer plastic Film, has very strong waterproof vapour permeability, closely laminates it on first base plate 1 with the laminator, can prevent effectively that steam from invading the display element between first base plate 1 and the second base plate 2, avoids the electronic paper display screen to damage because of weing. Furthermore, the edge sealing glue can be evenly coated on the periphery of the protective film, the effect of isolating water vapor is achieved, and the problem that the electronic paper display screen is damaged due to the fact that water vapor permeates into the display unit from the periphery of the protective film can be avoided.

In some embodiments, referring to fig. 3, the color of the pixel unit 3 is the same as the color of the first color potential particles 32, and the pixel unit 3 has three types, namely, a red pixel unit 301, a green pixel unit 302, and a blue pixel unit 303. That is, the red pixel unit 301 includes a microcapsule 30 having black potential particles 31 and red potential particles, the green pixel unit 302 includes a microcapsule 30 having black potential particles 31 and green potential particles, the blue pixel unit 303 includes a microcapsule 30 having black potential particles 31 and blue potential particles, such that the red pixel unit 301 can only display black and red, the green pixel unit 302 can only display black and green, and the blue pixel unit 303 can only display black and blue, the red pixel unit 301 is regarded as a red sub-pixel, the green pixel unit 302 is regarded as a green sub-pixel, and the blue pixel unit 303 is regarded as a blue sub-pixel, such that any color can be synthesized by the red sub-pixel, the green sub-pixel, and the blue sub-pixel, which is beneficial for improving the color display effect of the electronic paper display screen.

In some embodiments, the first color may also be white, but the red pixel unit 301, the green pixel unit 302, and the blue pixel unit 303 may also be synthesized to be white, so that the electronic paper display screen can display any color, and the display effect is better.

It should be noted that the color of the pixel unit 3 in the present application is determined according to the color of the first color potential particles 32 in the microcapsule 30 included in the pixel unit 3, so that the color of the first color potential particles 32 in the microcapsule 30 included in the pixel unit 3 at different positions can be set according to actual needs when designing an electronic paper display screen.

In some embodiments, referring to fig. 3, the pixel unit 3 includes a plurality of microcapsules 30 forming a microcapsule film, and the microcapsule film is attached to the pixel electrode 20.

Through the arrangement, a plurality of microcapsules 30 provided with red potential particles, a plurality of microcapsules 30 provided with green potential particles, and a plurality of microcapsules 30 provided with blue potential particles are all manufactured into a film, so that the microcapsules 30 form a whole, the manufactured film is directly adhered to the pixel electrode 20 to complete the arrangement of the microcapsules 30, the arrangement efficiency of the microcapsules 30 is greatly improved, the assembly efficiency of the electronic paper display screen is further improved, the stability of the microcapsules 30 can also be enhanced by adhering the film comprising the microcapsules 30 to the pixel electrode 20, the microcapsules 30 are not easy to move, and the accurate movement of the potential particles in the microcapsules 30 cannot be influenced.

In some embodiments, referring to fig. 3, the color of the microcapsule film is the same as the color of the pixel unit 3, and the microcapsule films have three kinds, which are a red microcapsule film 3011, a green microcapsule film 3021, and a blue microcapsule film 3031; the red microcapsule film 3011, the green microcapsule film 3021, and the blue microcapsule film 3031 are attached to the corresponding pixel electrodes 20.

It should be noted that there are three microcapsule films in the present application, and therefore, when the microcapsule film is attached to the pixel electrode 20, the attachment needs to be performed in three times, and only one microcapsule film is attached each time, in the present application, the attachment sequence of the three microcapsule films may be the red microcapsule film 3011, the green microcapsule film 3021, and the blue microcapsule film 3031, or may be the red microcapsule film 3011, the blue microcapsule film 3031, and the green microcapsule film 3021, or another attachment sequence, and the present embodiment is not limited in particular.

In some embodiments, the red microcapsule film 3011, the green microcapsule film 3021, and the blue microcapsule film 3031 do not overlap each other in a front projection on the second substrate 2. That is, the red microcapsule film 3011, the green microcapsule film 3021 and the blue microcapsule film 3031 are respectively in contact with each other or spaced from each other in a front projection on the second substrate 2, and of course, two of them may be in contact with each other, and the other one may be spaced from two of them. This ensures that the red microcapsule film 3011 realizes red display, the green microcapsule film 3021 realizes green display, and the blue microcapsule film 3031 realizes blue display, and that color mixture of any two or more of red, green, and blue does not occur, which results in impure red, green, and blue colors to be displayed, and the microcapsule film can be attached to the pixel electrode 20 well.

In some embodiments, referring to fig. 3, the number of red microcapsule films 3011, green microcapsule films 3021, and blue microcapsule films 3031 is plural, and the plural red microcapsule films 3011, the plural green microcapsule films 3021, and the plural blue microcapsule films 3031 are all arranged along the first direction X; the red microcapsule film 3011, the green microcapsule film 3021, and the blue microcapsule film 3031 are arranged in this order in the second direction Y, and the first direction X and the second direction Y are perpendicular to each other.

With the above arrangement, in the second direction Y, the combination of the red microcapsule film 3011, the green microcapsule film 3021 and the blue microcapsule film 3031 arranged in sequence can be regarded as a pixel, where the red microcapsule film 3011 is equivalent to a red sub-pixel, the green microcapsule film 3021 is equivalent to a green sub-pixel, and the blue microcapsule film 3031 is equivalent to a blue sub-pixel, so that any color can be synthesized by the red microcapsule film 3011, the green microcapsule film 3021 and the blue microcapsule film 3031, thereby enabling the electronic paper display screen to display any color and greatly improving the color display effect of the electronic paper display screen.

In some embodiments, referring to fig. 4, a plurality of data lines 4 are disposed on the second substrate 2, and the data lines 4 are used for applying a constant first voltage to the pixel electrode 20 for a preset time period to form a threshold voltage between the pixel electrode 20 and the common electrode 10; the pixel electrodes 20 corresponding to each pixel unit 3 are respectively connected with different data lines 4.

The threshold voltage is a voltage for driving the potential particles to move in a direction of approaching the first substrate 1. Specifically, a constant voltage is kept on the common electrode 10, and a constant driving voltage is applied to the pixel electrode 20, so that a certain voltage difference is formed between the pixel electrode 20 and the common electrode 10, and the voltage difference is a threshold voltage of the potential particles included in the pixel unit 3 corresponding to the pixel electrode 20.

Specifically, three data lines 4 may be provided, which are respectively a red data line corresponding to the red pixel unit 301, a green data line corresponding to the green pixel unit 302, and a blue data line corresponding to the blue pixel unit 303, such that each pixel unit 3 has a dedicated data line 4 to apply a driving voltage, and the first voltage values transmitted on the red data line, the green data line, and the blue data line are different, so that when the electronic paper display screen needs to display red, the first voltage is transmitted through the red data line, and when green needs to display green, the first voltage is transmitted through the green data line, which does not need to frequently change the value of the first voltage transmitted by the data line 4, thereby being more beneficial to controlling the color display effect of different pixel units 3, and the value of the first voltage transmitted by the data line 4 is always changed between two fixed and unchangeable values, and not easily damaging the data line 4, and not affecting the service life of the data line 4.

In the embodiment of the present application, the data lines 4 are divided into three types, each type of data line 4 corresponds to one type of pixel unit 3, and is used for transmitting the first voltage to the pixel electrode 20 corresponding to the pixel unit 3, where the three types of data lines 4 may be connected to the same driving chip 5, and may also be connected to different driving chips 5. When the three data lines 4 are connected to the same driving chip 5, the driving chip 5 needs to output first voltages with different magnitudes to different data lines 4, so that it can be ensured that the magnitudes of the first voltages transmitted by different data lines 4 are not equal, but there is a certain requirement on the performance of the driving chip 5 in this case.

When three kinds of data lines 4 are connected with different driving chips 5, referring to fig. 4, the present application includes a plurality of driving chips 5, each kind of data line 4 is correspondingly connected with one driving chip 5, so that the control of color display of different pixel units 3 can be better distinguished, the color display of different pixel units 3 can be independently controlled, and the control effect of color display of different pixel units 3 is improved.

In some embodiments, since the data lines 4 are electrically connected to the pixel electrodes 20, the data lines 4 may be disposed on the second substrate 2, so that the connection between the data lines 4 and the pixel electrodes 20 is facilitated, and the data lines 4 may be arranged on the second substrate 2 along the second direction Y and extend along the first direction X, so that the extending direction of the data lines 4 is consistent with the arrangement direction of the same microcapsule film, so that the layout of the data lines 4 on the second substrate 2 is more reasonable, and the connection between the data lines 4 and the pixel electrodes 20 corresponding to the same microcapsule film is also facilitated.

Specifically, the data lines 4 and the pixel electrodes 20 may be disposed on the same layer, so that the hierarchical structure on the second substrate 2 may be effectively utilized, the thickness of the film layer is reduced, and the electronic paper display screen is thinned. The data line 4 can be located between two pixel electrodes 20 arranged along the first direction X, and thus, a plurality of pixel electrodes 20 arranged along the second direction Y corresponding to the data line 4 are electrically connected with the data line 4, certainly, the present application is not limited thereto, and also a plurality of pixel electrodes 20 arranged along the second direction Y can be connected together through a conducting wire, and then the data line 4 is connected with one of the pixel electrodes 20, so that the use length of the data line 4 can be reduced, and the occupied space of the data line 4 on the second substrate 2 can also be reduced, so that the routing layout on the second substrate 2 is more concise and reasonable.

The principle that the electronic paper display screen of this application realized showing does: one pixel unit 3 in the electronic paper display screen is equivalent to a sub-pixel, if the voltage difference between the common electrode 10 and the pixel electrode 20 satisfies the threshold voltage of the black potential particles 31 in the pixel unit 3, the black potential particles 31 will move to the common electrode 10, so that the electronic paper display screen displays black, if the voltage difference between the common electrode 10 and the pixel electrode 20 satisfies the threshold voltage of the first color potential particles 32 in the pixel unit 3, the first color potential particles 32 will move to the common electrode 10, so that the electronic paper display screen displays the first color, since the voltage on the common electrode 10 is kept constant, the movement of the first color potential particles 32 and the black potential particles 31 in the pixel unit 3 can be controlled by controlling the magnitude of the driving voltage applied to the pixel electrode 20, and the display unit is further controlled to realize black state display or first color display.

The electronic paper display screen in the first embodiment of the application utilizes the ambient light to shine on first base plate 1, recycle the electric potential particle in microcapsule 30 and reflect light to viewer's eye, just can control the colour that reflects to viewer's eye through the colour of controlling the electric potential particle that is close to first base plate 1, compare in the light source that adopts strong backlight like this in liquid crystal display, these light sources penetrate eyes directly, very easily lead to eyes dry and astringent visual fatigue, blue light more can arouse the pathological change scheduling problem of eyes, the electronic paper display screen that does not need backlight unit of the first embodiment of the application, can guarantee to use eye health.

Example two

As shown in fig. 5, a second embodiment of the present application provides a display device, which includes a housing 200 and the electronic paper display screen 100 according to any of the above embodiments, wherein the electronic paper display screen 100 is disposed in the housing 200.

The detailed structure of the electronic paper display screen 100 can refer to the above embodiments, and is not described herein; it can be understood that, since the electronic paper display screen 100 is used in the display apparatus of the present application, the embodiment of the display apparatus of the present application includes all technical solutions of all embodiments of the electronic paper display screen 100, and can achieve the technical effects achieved by the technical solutions.

The display device of the second embodiment of the present application has the electronic paper display screen 100 and corresponding components, switches, buttons, and the like, and can implement color display.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. An electronic paper display screen comprises a first substrate (1) and a second substrate (2) which are oppositely arranged, a common electrode (10) is arranged on one side of the first substrate (1) facing the second substrate (2), a plurality of pixel electrodes (20) are arranged on one side of the second substrate (2) facing the first substrate (1), and a pixel unit (3) is arranged between each pixel electrode (20) and the common electrode (10),

the pixel unit (3) comprises a plurality of microcapsules (30), wherein each microcapsule (30) is provided with potential particles of two colors, the potential particles of the two colors are respectively a black potential particle (31) and a first color potential particle (32), and the first color is red, green or blue.

2. The electronic paper display screen of claim 1,

the color of the pixel unit (3) is the same as the color of the first color potential particles (32), and the pixel unit (3) has three colors, namely a red pixel unit (301), a green pixel unit (302) and a blue pixel unit (303).

3. The electronic paper display screen of claim 2,

the pixel unit (3) comprises a plurality of microcapsules (30) which form a microcapsule film, and the microcapsule film is attached to the pixel electrode (20).

4. The electronic paper display screen of claim 3,

the color of the microcapsule film is the same as that of the pixel unit (3), and the microcapsule films are three, namely a red microcapsule film (3011), a green microcapsule film (3021) and a blue microcapsule film (3031);

the red microcapsule film (3011), the green microcapsule film (3021), and the blue microcapsule film (3031) are attached to the corresponding pixel electrodes (20).

5. The electronic paper display screen of claim 4,

the red microcapsule film (3011), the green microcapsule film (3021) and the blue microcapsule film (3031) do not overlap with each other in a front projection on the second substrate (2).

6. The electronic paper display screen of claim 2,

the second substrate (2) is provided with a plurality of data lines (4), the data lines (4) are used for applying a constant first voltage to the pixel electrodes (20) within a preset time length so as to form a threshold voltage between the pixel electrodes (20) and the common electrode (10), and the threshold voltage is a voltage for driving potential particles to move towards a direction close to the first substrate (1);

the pixel electrode (20) corresponding to each pixel unit (3) is respectively connected with different data lines (4).

7. The electronic paper display screen of claim 6,

the electronic paper display screen further comprises a plurality of driving chips (5), and each data line (4) is correspondingly connected with one driving chip (5).

8. The electronic paper display screen according to claim 4 or 5,

the number of the red microcapsule film (3011), the number of the green microcapsule film (3021), and the number of the blue microcapsule film (3031) are all plural, and the plural red microcapsule films (3011), the plural green microcapsule films (3021), and the plural blue microcapsule films (3031) are all arranged along a first direction (X);

the red microcapsule film (3011), the green microcapsule film (3021), and the blue microcapsule film (3031) are arranged in sequence along a second direction (Y), and the first direction (X) and the second direction (Y) are perpendicular to each other.

9. An electronic paper display according to any of claims 1-7 characterised in that the microcapsules (30) are spherical and the diameter D of the microcapsules (30) is 0.02-0.12 mm.

10. A display device, comprising:

a housing (200);

the electronic paper display screen (100) of any one of claims 1 to 9, disposed within the housing (200).

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