CN220709507U

CN220709507U - Electrophoresis display screen and electronic equipment

Info

Publication number: CN220709507U
Application number: CN202322189968.0U
Authority: CN
Inventors: 杨小波
Original assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd; Guangzhou Shirui Electronics Co Ltd
Current assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd; Guangzhou Shirui Electronics Co Ltd
Priority date: 2023-08-14
Filing date: 2023-08-14
Publication date: 2024-04-02
Anticipated expiration: 2033-08-14

Abstract

The utility model belongs to the technical field of display screens, and particularly relates to an electrophoretic display screen and electronic equipment. The electrophoretic display screen comprises: a transparent substrate, one side of which is provided with a common electrode; the driving substrate is arranged opposite to the public electrode, and one side of the driving substrate facing the public electrode is provided with a plurality of pixel electrodes which are arranged in an array manner; the electrophoresis display layer is arranged between the pixel electrode and the public electrode, and comprises a plurality of microcapsules, each microcapsule contains a plurality of first charged particles, a plurality of noctilucent particles and an electrophoresis liquid, the first charged particles and the noctilucent particles are suspended in the electrophoresis liquid, the noctilucent particles are neutral particles, and the first charged particles and the noctilucent particles have different colors. The luminous particles in the electrophoresis display screen of the embodiment can emit light in a dark environment, so that the color development of the electrophoresis display screen in the dark environment is realized, a front light source is omitted, and the energy consumption and the production cost are reduced.

Description

Electrophoresis display screen and electronic equipment

Technical Field

The utility model belongs to the technical field of display screens, and particularly relates to an electrophoretic display screen and electronic equipment.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

The electrophoresis display screen can display pictures by reflecting ambient light and has the functions of energy conservation and eye protection, but the electrophoresis display screen can not display pictures in dark environment. In the related art, the scheme of adding the front light source in the electrophoretic display screen is used for assisting the illumination in the dark environment, so that the problem of invisible electrophoretic display screen in the dark environment is solved, but the energy consumption and the production cost are increased.

Disclosure of Invention

The utility model aims to at least solve the problems of energy consumption and production cost increase caused by the fact that the electrophoretic display screen is visible in a dark environment through a front light source. The aim is achieved by the following technical scheme:

a first aspect of the present utility model proposes an electrophoretic display screen comprising:

a transparent substrate, wherein a common electrode is arranged on one side of the transparent substrate;

the driving substrate is arranged opposite to the public electrode, and one side of the driving substrate facing the public electrode is provided with a plurality of pixel electrodes which are arranged in an array manner;

the electrophoresis display layer is arranged between the pixel electrode and the public electrode, the electrophoresis display layer comprises a plurality of microcapsules, each microcapsule comprises a plurality of first charged particles, a plurality of noctilucent particles and an electrophoresis liquid, the first charged particles and the noctilucent particles are suspended in the electrophoresis liquid, the noctilucent particles are neutral particles, and the first charged particles and the noctilucent particles have different colors.

According to the electrophoretic display screen, one of the two charged particles in the microcapsule is replaced by the neutral luminous particle, and the luminous particle can emit light in a dark environment, so that the color development of the electrophoretic display screen in the dark environment is realized, a front light source is omitted, and the energy consumption and the production cost are reduced.

In addition, the electrophoretic display screen according to the present utility model may further have the following additional technical features: the luminous particles comprise fluorescent particles

In some embodiments of the utility model, the fluorescent particles are one of red, green, or orange particles.

In some embodiments of the utility model, the first charged particles are white particles or black particles.

In some embodiments of the utility model, the fluorescent particles have a particle size of 20nm to 50nm;

and/or the particle size of the first charged particles is 80 nm-500 nm.

In some embodiments of the utility model, the electrophoretic fluid is a transparent fluid.

In some embodiments of the utility model, a plurality of second charged particles are also contained within the microcapsule, the plurality of second charged particles are suspended within the electrophoretic fluid, the second charged particles are the same color as the luminescent particles, and the second charged particles are of opposite polarity to the first charged particles.

In some embodiments of the utility model, the volume of the plurality of second charged particles is less than the volume of the plurality of first charged particles, and the sum of the volumes of the plurality of luminescent particles and the plurality of second charged particles is greater than or equal to the volume of the plurality of first charged particles.

In some embodiments of the utility model, the color of the electrophoretic fluid is the same as the color of the luminescent particles.

The second aspect of the utility model provides an electronic device, which comprises a housing, wherein the electrophoretic display screen provided by the first aspect of the utility model is arranged in the housing.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

fig. 1 schematically shows a schematic view of an electrophoretic display according to an embodiment of the present utility model.

Fig. 2 schematically shows a schematic view of an electrophoretic display according to another embodiment of the present utility model.

The reference numerals are as follows: 1. a transparent substrate; 2. a driving substrate; 3. a common electrode; 4. a pixel electrode; 5. a microcapsule; 6. an electrophoretic fluid; 7. a first charged particle; 8. noctilucent particles; 9. and second charged particles.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

The following detailed description of the technical solutions of the present embodiment is given with reference to the accompanying drawings, and the following embodiments and examples may be combined with each other without conflict.

As shown in fig. 1, according to an embodiment of the present utility model, an electrophoretic display panel is provided, which includes a transparent substrate 1, a driving substrate 2, and an electrophoretic display layer, as shown in fig. 1 and 2, wherein the transparent substrate 1, the electrophoretic display layer, and the driving substrate 2 are sequentially stacked from outside to inside. The outer side of the transparent substrate 1 is the viewing side, i.e. the user views the electrophoretic display layer from the outer side of the transparent substrate 1 inwards, the transparent substrate 1 being for example a PET plate. The transparent substrate 1 is provided with a common electrode 3 at a side close to the electrophoretic display layer, the common electrode 3 extends along a length direction and a width direction of the transparent substrate 1, and the common electrode 3 may be an ITO (indium tin oxide) conductive film or a graphene conductive film formed on the transparent substrate 1. The driving substrate 2 is arranged opposite to the common electrode 3, one side of the driving substrate 2 facing the common electrode 3 is provided with a plurality of pixel electrodes 4 arranged in an array, and the pixel electrodes 4 and the common electrode 3 are used for applying voltages on two sides of the electrophoretic display layer to drive the electrophoretic display layer to display. The electrophoretic display layer is arranged between the pixel electrode 4 and the common electrode 3, the electrophoretic display layer comprises a plurality of microcapsules 5, and the pixel electrode 4 is arranged in a plurality and corresponds to the microcapsules 5 in the electrophoretic display layer. The shaft side of the electrophoretic display layer is further filled with a sealing glue layer, the sealing glue layer is connected with the transparent substrate 1 and the driving substrate 2, and the sealing glue layer is used for preventing water vapor and dust from entering the electrophoretic display layer to influence the service life of the electrophoretic display layer. The sealant layer comprises a waterproof material, wherein the waterproof material is preferably epoxy resin, silica gel material, thermoplastic gel material, or the sealant layer is itself epoxy resin or silica gel material. Each microcapsule 5 contains therein a plurality of first charged particles 7, a plurality of luminescent particles 8 and an electrophoretic fluid 6, and the plurality of first charged particles 7 and the plurality of luminescent particles 8 are suspended in the electrophoretic fluid 6. Wherein the luminescent particles 8 are neutral particles, and the first charged particles 7 and the luminescent particles 8 have different colors. The electrophoretic fluid 6 is a low-polarity dispersion solvent such as aromatic hydrocarbon or halogenated substance. The electrophoretic fluid 6 has a certain viscosity, which enables the first charged particles 7 and the luminescent particles 8 to keep a certain position from moving. When an electric field is applied between the pixel electrode 4 and the common electrode 3, the first charged particles 7 move to one side of the corresponding electrode according to the polarity of the electric field. If the first charged particles 7 are positively charged and the pixel electrodes 4 are positively charged, the first electrodes move to the transparent substrate 1 side, and the luminescent particles 8 are correspondingly pushed to the driving substrate 2 side, so that the electrophoretic display screen displays the color corresponding to the first charged particles 7. If the first charged particles 7 are positively charged and the pixel electrode 4 is negatively charged, the first electrode moves to the side of the driving substrate 2, and the luminescent particles 8 are correspondingly extruded to the side of the transparent substrate 1, so that the electrophoretic display screen displays the color corresponding to the luminescent particles 8 for an observer. When the applied electric field is removed, the electrophoretic display is still in the acquired state.

The luminescent particles 8 comprise or are directly made of a luminescent material. In one example, the luminescent material comprises a fluorescent material that is capable of absorbing ambient light in an environment with light and self-emitting light in an environment without light. In another example, the luminescent material includes triple hydrogen (Trituin), which is a self-luminous luminescent material that can continuously emit light without absorbing energy from the outside.

According to the embodiment, one charged particle of two charged particles in the microcapsule 5 is replaced by the neutral luminous particle 8, and the luminous particle 8 can emit light in a dark environment, so that the color development of the electrophoretic display screen in the dark environment is realized, a front light source is omitted, and the energy consumption and the production cost are reduced.

In some embodiments, the luminescent particles 8 comprise fluorescent particles, which may be made of a variety of polymers. In one example, the fluorescent particles are Polyacrylonitrile (PAN) nanoparticles that have fairly strong fluorescence when labeled, and are very small (less than 30nm in diameter). The polyacrylonitrile nanoparticles contained a low concentration of interfering substances and the polyacrylonitrile nanoparticles could have carboxylated surfaces or surfaces modified with streptavidin, all particles being supplied in the form of a 0.5% (w/w) buffered aqueous suspension (10 mM MES, pH 7). In another example, the fluorescent particles are dihydroxy Polyether (PD) nanoparticles that have low oxygen permeability, high stability, particle size less than 40nm, and polyacrylonitrile nanoparticles can have carboxylated or otherwise modified surfaces. All particles were supplied as a 0.5% (w/w) buffered aqueous suspension (10 mM MES, pH 7). The fluorescent particles are, for example, one of red particles, green particles, or orange particles. In other examples, the fluorescent particles may also be white particles or black particles.

In some embodiments, the first charged particles 7 are white particles or black particles. The polarity of the first charged particles 7 is not limited, and may be positively charged or negatively charged, and may be selected as needed. In other realizable ways, the first charged particles 7 may also be particles of other colors, for example red, green or yellow particles, etc.

In some embodiments, the particle size of the fluorescent particles is 20nm to 50nm, and in this particle size range, the fluorescent particles can be stably dispersed in the electrophoretic fluid 6. And/or the first charged particles 7 have a particle diameter of 80nm to 500nm, and within this particle diameter range, the first charged particles 7 can be stably dispersed in the electrophoretic fluid 6.

In some embodiments, the electrophoretic fluid 6 is a transparent fluid, and the transparent fluid can make the color of the fluorescent particles or the first charged particles 7 develop better on the transparent substrate 1 side, so that the electrophoretic display screen has better color development effect, and the visual effect of the observer on the transparent substrate 1 side is better.

The technical solution of this embodiment will be described in detail below with reference to specific examples, referring to fig. 1, the noctilucent particles 8 are orange noctilucent particles 8, the first charged particles 7 are white positively charged particles, the noctilucent particles 8 and the first charged particles 7 are suspended in the transparent electrophoretic liquid 6, when an electric field is applied between the pixel electrode 4 and the common electrode 3, one side of the pixel electrode 4 is positively charged, one side of the common electrode 3 is negatively charged, the plurality of first charged particles 7 move toward one side of the common electrode 3, the plurality of noctilucent particles 8 are correspondingly squeezed to one side of the pixel electrode 4, and the color of the observer looking at the transparent substrate 1 at this time is white. When an electric field is applied between the pixel electrode 4 and the common electrode 3, the pixel electrode 4 is negatively charged, the common electrode 3 is positively charged, the plurality of first charged particles 7 move toward the pixel electrode 4, the plurality of luminous particles 8 are correspondingly pressed to the common electrode 3, and the color of the observer looking at the transparent substrate 1 at this time is orange. When an electric field is applied between the pixel electrode 4 and the common electrode 3, a part of the pixel electrode 4 is positively charged, a part of the pixel electrode is negatively charged, a part of the common electrode 3 corresponding to the positively charged pixel electrode 4 is negatively charged, a part corresponding to the negatively charged pixel electrode 4 is positively charged, a part of the plurality of first charged particles 7 move toward the negatively charged side of the pixel electrode 4, another part moves toward the negatively charged side of the common electrode 3, a corresponding part of the plurality of luminous particles 8 is pushed to the positively charged side of the common electrode 3, and another part is pushed to the positively charged side of the pixel electrode 4, and the color seen by the observer from the transparent substrate 1 at this time is orange and white.

According to the embodiment of the present utility model, the microcapsule 5 of the present embodiment contains a plurality of first charged particles 7, a plurality of luminescent particles 8, and an electrophoretic fluid 6, the luminescent particles 8 are neutral particles, and the luminescent particles 8 are different in color from the first charged particles 7. The microcapsule 5 further comprises second charged particles 9, the second charged particles 9 and the noctilucent particles 8 have the same color, and are used for compensating the color development of the noctilucent particles 8, and the plurality of first charged particles 7, the plurality of second charged particles 9 and the plurality of noctilucent particles 8 are all suspended in the electrophoresis liquid 6. The second charged particles 9 are of opposite polarity to the first charged particles 7, e.g. the first charged particles 7 are positively charged and the second charged particles 9 are negatively charged, or the first charged particles 7 are negatively charged and the second charged particles 9 are positively charged. When the first charged particles 7 move to one side of the pixel electrode 4, the noctilucent particles 8 are extruded to one side of the common electrode 3, but because the noctilucent particles 8 are neutral particles and do not have polarity movement, the noctilucent particles 8 may not be attached to one side of the microcapsule 5 close to the common electrode 3, but are distributed in a loose state, and the problem that the color development effect of the electrophoretic display screen is not ideal under the condition of light may occur. When an electric field is applied between the pixel electrode 4 and the common electrode 3, the first charged particles 7 and the second charged particles 9 move to one side of the respective electrodes according to the polarity of the electric field, for example, the first electrode moves to one side of the transparent substrate 1, the second charged particles 9 move to one side of the driving substrate 2 while the luminescent particles 8 are also pressed to one side of the driving substrate 2, and for viewing, the electrophoretic display screen displays a color corresponding to the first charged particles 7, and if the first electrode moves to one side of the driving substrate 2, the second charged particles 9 move to one side of the transparent substrate 1 while the luminescent particles 8 are pressed to one side of the transparent substrate 1, and for viewing, the electrophoretic display screen displays a color corresponding to the luminescent particles 8.

In some embodiments, the volume of the plurality of second charged particles 9 is smaller than the volume of the plurality of first charged particles 7, and the sum of the volumes of the plurality of luminescent particles 8 and the plurality of second charged particles 9 is greater than or equal to the volume of the plurality of first charged particles 7, so that the second charged particles 9 are jointly colored by the luminescent particles 8 and the second charged particles 9 when moving to the transparent substrate 1 side, and the condition that the second charged particles 9 only develop color is avoided, thereby ensuring the visual effect of the electrophoretic display screen in dark environment.

The technical solution of this embodiment will be described in detail below with reference to a specific example, referring to fig. 2, the noctilucent particles 8 are orange noctilucent particles 8, the first charged particles 7 are white positively charged particles, the second charged particles 9 are orange negatively charged particles, the noctilucent particles 8, the first charged particles 7 and the second charged particles 9 are all suspended in the transparent electrophoretic liquid 6, when an electric field is applied between the pixel electrode 4 and the common electrode 3, one side of the pixel electrode 4 is positively charged, one side of the common electrode 3 is negatively charged, the plurality of first charged particles 7 move toward one side of the common electrode 3, the plurality of second charged particles 9 move toward one side of the pixel electrode 4, the plurality of noctilucent particles 8 are correspondingly squeezed to one side of the pixel electrode 4, and the color seen by the observer from the transparent substrate 1 at this time is white. When an electric field is applied between the pixel electrode 4 and the common electrode 3, the pixel electrode 4 is negatively charged, the common electrode 3 is positively charged, the plurality of first charged particles 7 move toward the pixel electrode 4, the plurality of second charged particles 9 move toward the common electrode 3, the plurality of luminous particles 8 are pressed to the common electrode 3, and the color seen from the transparent substrate 1 by the observer at this time is orange. When an electric field is applied between the pixel electrode 4 and the common electrode 3, a part of the pixel electrode 4 is positively charged, a part of the common electrode 3 is negatively charged, a part of the common electrode 3 corresponding to the positively charged pixel electrode 4 is negatively charged, a part of the plurality of first charged particles 7 move toward the negatively charged side of the pixel electrode 4, another part moves toward the negatively charged side of the common electrode 3, a part of the plurality of second charged particles 9 move toward the negatively charged side of the common electrode 3, another part moves toward the positively charged side of the pixel electrode 4, and at the same time, a corresponding part of the plurality of luminescent particles 8 is pushed to the positively charged side of the common electrode 3, another part is pushed to the positively charged side of the pixel electrode 4, and the color seen from the transparent substrate 1 by the observer at this time is orange and white.

According to the embodiment of the present utility model, the microcapsule 5 of the present embodiment contains a plurality of first charged particles 7, a plurality of luminescent particles 8, and an electrophoretic fluid 6, the luminescent particles 8 are neutral particles, and the luminescent particles 8 are different in color from the first charged particles 7. The color of the electrophoretic liquid 6 of the present embodiment is the same as that of the luminescent particles 8, so that when the luminescent particles 8 are located on the transparent substrate 1 side, color compensation is performed on the electrophoretic display screen, and when the first charged particles 7 are moved to the pixel electrode 4 side, the luminescent particles 8 are extruded to the common electrode 3 side, but because the luminescent particles 8 are neutral particles and do not have polarity movement, the luminescent particles 8 may not be attached to the microcapsule 5 side close to the common electrode 3 side, but are distributed in a loose state, and the problem that the color effect of the electrophoretic display screen is not ideal under the condition of light may occur, and when the luminescent particles 8 are located on the transparent substrate 1 side, color compensation is performed on the electrophoretic display screen, so that the display effect of the electrophoretic display screen is improved. Illustratively, the electrophoretic fluid 6 is added with neutral dye particles of the same color as the luminescent particles 8, for example.

The technical solution of this embodiment will be described in detail below with reference to specific examples, referring to fig. 1, the noctilucent particles 8 are orange noctilucent particles 8, the first charged particles 7 are white positively charged particles, the noctilucent particles 8 and the first charged particles 7 are suspended in the orange electrophoretic liquid 6, when an electric field is applied between the pixel electrode 4 and the common electrode 3, one side of the pixel electrode 4 is positively charged, one side of the common electrode 3 is negatively charged, the plurality of first charged particles 7 move toward one side of the common electrode 3, the plurality of noctilucent particles 8 are correspondingly squeezed to one side of the pixel electrode 4, and the color of the observer looking at the transparent substrate 1 at this time is white. When an electric field is applied between the pixel electrode 4 and the common electrode 3, the pixel electrode 4 is negatively charged, the common electrode 3 is positively charged, the plurality of first charged particles 7 move toward the pixel electrode 4, the plurality of luminous particles 8 are correspondingly pressed to the common electrode 3, and the color of the observer looking at the transparent substrate 1 at this time is orange. When an electric field is applied between the pixel electrode 4 and the common electrode 3, a part of the pixel electrode 4 is positively charged, a part of the pixel electrode is negatively charged, a part of the common electrode 3 corresponding to the positively charged pixel electrode 4 is negatively charged, a part corresponding to the negatively charged pixel electrode 4 is positively charged, a part of the plurality of first charged particles 7 move toward the negatively charged side of the pixel electrode 4, another part moves toward the negatively charged side of the common electrode 3, a corresponding part of the plurality of luminous particles 8 is pushed to the positively charged side of the common electrode 3, and another part is pushed to the positively charged side of the pixel electrode 4, and the color seen by the observer from the transparent substrate 1 at this time is orange and white.

The embodiment also provides electronic equipment, which comprises a shell, wherein the electrophoresis display screen provided by any one of the embodiments is arranged in the shell. The electrophoresis display screen of the embodiment can normally display in the light environment and also can normally display in the dark environment, a front light source is omitted, and the energy consumption and the production cost are reduced.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. An electrophoretic display screen, comprising:

2. The electrophoretic display screen of claim 1, wherein the luminescent particles comprise fluorescent particles.

3. The electrophoretic display screen of claim 2, wherein the fluorescent particles are one of red, green, or orange particles.

4. An electrophoretic display screen according to claim 1, wherein the first charged particles are white particles or black particles.

5. The electrophoretic display screen according to claim 1, wherein the particle size of the noctilucent particles is 20nm to 50nm;

and/or the particle size of the first charged particles is 80 nm-500 nm.

6. An electrophoretic display screen as claimed in claim 1, wherein the electrophoretic fluid is a transparent fluid.

7. An electrophoretic display screen according to any of claims 1-6, wherein the microcapsules further comprise a plurality of second charged particles suspended in the electrophoretic fluid, the second charged particles being the same color as the luminescent particles and the second charged particles being of opposite polarity to the first charged particles.

8. The electrophoretic display screen of claim 7, wherein the volume of the plurality of second charged particles is less than the volume of the plurality of first charged particles, and wherein the sum of the volumes of the plurality of luminescent particles and the plurality of second charged particles is greater than or equal to the volume of the plurality of first charged particles.

9. An electrophoretic display screen according to any of claims 1-5, wherein the color of the electrophoretic fluid is the same as the color of the luminescent particles.

10. An electronic device, characterized in that the electronic device comprises a housing, in which the electrophoretic display screen according to any one of claims 1-9 is arranged.