WO2018020856A1 - Display device and electronic device - Google Patents

Abstract

This display device is provided with a first substrate, a plurality of first electrodes provided on the first substrate, a second substrate disposed facing the first substrate, a second electrode formed on the first-electrode side of the second electrode, a display layer that is sealed between the first substrate and the second substrate and that includes migration particles, and a partition wall that divides the display layer into a plurality of element regions. The partition wall includes three or more apex parts and one or more linear parts that connect two selective apex parts from among the three or more apex parts, each of the linear parts having a length greater than the shortest distance between the two apex parts connected by said linear parts.

Description

Display device and electronic device

The present disclosure relates to a display device including an electrophoretic element, for example, and an electronic apparatus including the same.

In recent years, display devices (electrophoretic display) using an electrophoretic phenomenon have been developed not only for reading but also for various uses such as fashion. The structure of this display device is broadly divided into two types. For example, there are a microcapsule method (for example, Patent Document 1) and a microcup method (a partition wall method, a rib method) (for example, Patent Documents 2 and 3). Among these, the microcapsule method is one in which microcapsules enclosing electrophoretic particles are arranged between a pair of electrodes. In this method, the sheeting process is simple, but the size of the microcapsules that can be manufactured is limited, and thus it is difficult to tune display characteristics by adjusting the distance between the electrodes. Further, as the distance between the electrodes decreases and the diameter of the capsule decreases, the ratio of the capsule outer shell that does not contribute to the display in the sheet increases, so that the display quality decreases. Furthermore, since the capsule is often formed of a mechanically fragile material, it is easily broken by external pressure, which may cause a display failure.

On the other hand, the microcup method uses a partition to partition the migrating particles into a plurality of regions. In this system, the migrating particles can be held in a certain area. Further, since the distance between the electrodes can be adjusted relatively freely by changing the height of the partition wall, the display characteristics can be easily tuned.

JP-T-2002-532756 International Publication No. 2005/015892 JP 2014-170188 A

When such a partition is used in a display device using a flexible substrate, for example, the degree of freedom (flexibility) in deformation such as bending is improved while holding the migrating particles in a certain area. It is desirable. It is desirable to suppress deterioration in display quality due to electrophoretic particle bias and lack of flexibility.

It is desirable to provide a display device and an electronic device that can suppress a decrease in display quality.

A display device according to an embodiment of the present disclosure includes a first substrate, a plurality of first electrodes provided on the first substrate, a second substrate disposed to face the first substrate, and a second substrate A second electrode formed on the first electrode side of the substrate, a display layer containing migrating particles, sealed between the first substrate and the second substrate, and the display layer divided into a plurality of element regions And a partition wall. The partition wall includes three or more vertex portions in plan view and one or more linear portions connecting two optional vertex portions of the three or more vertex portions, and each linear portion has the linear shape. It has a length greater than the shortest distance between the two apexes connected by the part.

An electronic apparatus according to an embodiment of the present disclosure includes the display device according to the embodiment of the present disclosure.

In the display device and the electronic apparatus according to an embodiment of the present disclosure, a partition that is sealed between the first substrate and the second substrate and that divides the display layer containing migrating particles into a plurality of element regions is provided. ing. In a plan view, the linear portion constituting the partition wall has a length greater than the shortest distance between the two apex portions connected by the linear portion. Thereby, the stretchability of the whole partition is improved, and the stress applied to the partition when the entire apparatus is deformed by bending or the like is relieved.

According to the display device and the electronic apparatus according to the embodiment of the present disclosure, the partition wall that is sealed between the first substrate and the second substrate and that divides the display layer including the migrating particles into a plurality of element regions is provided. Is provided. This partition includes one or a plurality of linear portions connecting two selective vertex portions of three or more vertex portions in plan view. Since each linear part has a length larger than the shortest distance between two apex parts connected by the linear part, the stress applied to the partition wall is alleviated when the entire apparatus is deformed by bending or the like. be able to. The partition wall can improve flexibility with respect to deformation while suppressing the bias of the migrating particles. Therefore, display quality can be improved.

In addition, the effect described here is not necessarily limited, and may be any effect described in the present disclosure.

It is a cross-sectional schematic diagram showing the structure of the display apparatus which concerns on one embodiment of this indication. It is a plane schematic diagram showing the structure of the electrophoretic element containing the electrophoretic particle shown in FIG. It is a plane schematic diagram showing the 1st example of the basic skeleton shape of the partition shown in FIG. It is a plane schematic diagram showing the 2nd example of the basic skeleton shape of the partition shown in FIG. It is a plane schematic diagram showing the 3rd example of the basic skeleton shape of the partition shown in FIG. It is a plane schematic diagram for demonstrating an example of the linear part which comprises the partition shown in FIG. It is a plane schematic diagram showing an example of the partition containing the linear part shown in FIG. It is a plane schematic diagram for demonstrating the other example of the linear part which comprises the partition shown in FIG. It is a plane schematic diagram showing an example of the partition containing the linear part shown in FIG. It is sectional drawing for demonstrating the manufacturing process of the display apparatus shown in FIG. FIG. 9 is a cross-sectional diagram illustrating a process following the process in FIG. 8. FIG. 10 is a cross-sectional diagram illustrating a process following the process in FIG. 9. It is sectional drawing showing the process of following FIG. 10A. It is sectional drawing for demonstrating the manufacturing process of the display apparatus shown in FIG. FIG. 12 is a cross-sectional view illustrating a process following FIG. 10B and FIG. 11. It is a plane schematic diagram showing the structure of the partition concerning a comparative example. FIG. 10 is a schematic plan view for explaining an example of a linear portion constituting a partition wall according to Modification Example 1. It is a plane schematic diagram showing an example of the partition containing the linear part shown in FIG. 10 is a schematic plan view for explaining an example of a linear portion constituting a partition wall according to Modification 2. FIG. It is a plane schematic diagram showing an example of the partition containing the linear part shown in FIG. FIG. 11 is a schematic plan view for explaining an example of a linear portion that configures a partition wall according to Modification 3. It is a plane schematic diagram showing an example of the partition containing the linear part shown in FIG. FIG. 10 is a schematic plan view for explaining an example of a linear portion constituting a partition wall according to Modification Example 4. It is a plane schematic diagram showing an example of the partition containing the linear part shown in FIG. 12 is a perspective view illustrating an example of an appearance of application example 1. FIG. 12 is a perspective view illustrating another example of the appearance of application example 1. FIG. 12 is a perspective view illustrating an example of an appearance of application example 2. FIG. 22 is a perspective view illustrating another example of the appearance of application example 2. FIG. 14 is a perspective view illustrating an example of an appearance of application example 3. FIG.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The description will be given in the following order.

1. Embodiment (Example of display device in which each linear part constituting partition has a length larger than the shortest distance between apexes)
2. Modification 1 (example in which the linear part of the partition wall intersects once with the straight line connecting the apex parts)
3. Modification 2 (Another example in which the linear part of the partition wall intersects once with the straight line connecting the apex parts)
4). Modification 3 (example in which the linear part of the partition wall intersects the straight line connecting the apex parts twice)
5. Modification 4 (example in which the linear portion of the partition wall includes a curved portion and a straight portion between the apex portions)
6). Application examples (examples of electronic devices)

<Embodiment>
[Constitution]
FIG. 1 illustrates a cross-sectional configuration of a display device (display device 1) according to an embodiment of the present disclosure. The display device 1 is an electrophoretic display (so-called electronic paper display) that displays an image (for example, character information) using an electrophoretic phenomenon. The display device 1 includes, for example, a first electrode 21, an adhesive layer 22, a display layer 20, a second electrode 32, and a second substrate 31 in this order on the first substrate 11. A plurality of first electrodes 21 are provided on the first substrate 11. The display layer 20 is sealed between the first substrate 11 and the second substrate 31 and includes the electrophoretic element 24. The second electrode 32 is provided on the surface of the second substrate 31 on the first electrode 21 side. The display layer 20 is provided with a partition wall 23 that divides the display layer 20 into a plurality of element regions (cells 20A). FIG. 1 schematically illustrates the configuration of the display device 1 and may differ from actual dimensions and shapes.

The first substrate 11 is desirably configured to include a material having stretchability (stretchability), for example. As an example of the material having elasticity, natural rubber or synthetic rubber can be given. Examples of the synthetic rubber include thermoplastic elastomers such as silicone resin, urethane resin, epichlorohydrin resin, acrylic ester resin, chlorosulfonated polyethylene, ethylene propylene, polybutadiene resin, and nitrile resin. Alternatively, a photocurable elastomer containing these resins in the main skeleton may be used. The thickness of the first substrate 11 is, for example, not less than 0.05 mm and not more than 5 mm, and can be, for example, 1 mm. The same applies to the second substrate 31, and it is preferable that the second substrate 31 includes a material having elasticity similar to that of the first substrate 11.

However, the first substrate 11 is not limited to the stretchable material as described above, and may be configured to include a material having flexibility (flexibility). Examples of the flexible material include plastic materials. Examples of the plastic material include polyimides, polyamides, polyacetals, polycarbonate (PC), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethyl ether ketone (PEEK), polyether sulfone (PES), and polyolefin. Etc. In addition, a cellulose nanofiber substrate may be used. In addition to the plastic material, an inorganic material or a metal material that can exhibit flexibility by thinning may be used. Examples of such an inorganic material include silicon (Si), silicon oxide (SiO _x ), silicon nitride (SiN _x ), aluminum oxide (AlO _x ), and the like. Silicon oxide includes glass or spin-on-glass (SOG). Examples of the metal material include aluminum (Al), nickel (Ni), and stainless steel. Furthermore, you may use the board | substrate which processed many fibers into thin and wide plate shape, such as paper and cloth. Here, examples of the fabric include woven fabric, knitted fabric, felt, and non-woven fabric.

The display device 1 of the present embodiment exemplifies a configuration in which a plurality of first electrodes 21 are arranged on the first substrate 11 as a so-called segment type display device, for example. Not only the segment method but also a passive matrix method or an active matrix method can be applied. In the case of the passive matrix system or the active matrix system, other elements (not shown) such as TFTs (Thin Film Transistors) are formed on the first substrate 11.

The first electrode 21 is two-dimensionally arranged on the first substrate 11 in a matrix, for example. A region corresponding to each first electrode 21 is one pixel or a display unit region. It is desirable that the first electrode 21 includes a conductive material having elasticity. Examples of conductive materials having elasticity include metal nanofibers (silver nanofibers or copper nanofibers), carbon (carbon nanofibers or graphene, etc.), polythiophene-based conductive polymers (PEDOT-PSS), and mixtures thereof. Is mentioned. However, the constituent material of the first electrode 21 may not have elasticity, for example, indium oxide-tin oxide (ITO), antimony oxide-tin oxide (ATO), fluorine-doped tin oxide (FTO) or A light-transmitting conductive material such as aluminum-doped zinc oxide (AZO) may be used. Moreover, it does not need to have transparency, In addition to the above materials, for example, metal materials such as gold (Au), silver (Ag), aluminum (Al), molybdenum (Mo) or copper (Cu), and A laminated film containing two or more of these may be used.

The adhesive layer 22 includes, for example, a polymer polyester resin, an acrylic resin, a polyurethane resin, an epoxy resin, and the like.

The display layer 20 includes the electrophoretic element 24 in each element region (cell 20A) divided (partitioned) by the partition wall 23.

The partition wall 23 divides the display layer 20 spatially and supports the thickness of the display layer 20 in the Z-axis direction. The cell 20A accommodates migrating particles 241 and the like that constitute the electrophoretic element 24, respectively. The number of cells 20A and the arrangement pattern are not particularly limited. However, in order to efficiently arrange the cells 20A, it is desirable that the cells 20A are arranged in a matrix, for example (having a close-packed structure). The planar shape (XY planar shape) of the cell 20A is determined by the structure of the partition wall 23 described later. A specific configuration of the partition wall 23 will be described later.

In FIG. 1, one cell 20 </ b> A is shown to be disposed to face one first electrode 21, but the formation region of the cell 20 </ b> A and the formation region of the first electrode 21 coincide with each other. Instead, it may be shifted. In addition, one cell 20 </ b> A may be disposed across the plurality of first electrodes 21, and a plurality of cells 20 </ b> A may be formed for one first electrode 21.

(Configuration of electrophoretic element 24)
FIG. 2 schematically shows a planar configuration of the electrophoretic element 24. The electrophoretic element 24 generates contrast using an electrophoretic phenomenon. The electrophoretic element 24 includes electrophoretic particles 241 and a porous layer 242 having pores 242H in an insulating liquid 243. The insulating liquid 243 is filled in the space between the driving substrate 10 and the counter substrate 30, and the porous layer 242 is supported by the partition walls 23, for example. Here, the configuration of the electrophoretic element 24 including the porous layer 242 and the electrophoretic particles 241 will be described as an example, but this configuration is merely an example, and the configuration of the electrophoretic element 24 is limited to this. It is not something. For example, in addition to the configuration described below, the electrophoretic element 24 may be configured only with a plurality of electrophoretic particles, or may include a colored solution and colored particles. The display device 1 can be applied to a general electrophoretic element having a partition structure. Further, the display device 1 is not limited to such an electrophoretic type, and a magnetophoretic type display element may be used.

The space filled with the insulating liquid 243 is divided into, for example, a retreat area R1 closer to the first electrode 21 and a display area R2 closer to the second electrode 32 with the porous layer 242 as a boundary. ing. In FIG. 1, only a part of the pores 242 </ b> H is shown in order to simplify the illustration.

The insulating liquid 243 is made of, for example, an organic solvent such as paraffin or isoparaffin. As the insulating liquid 243, one type of organic solvent may be used, or a plurality of types of organic solvents may be used. The viscosity and refractive index of the insulating liquid 243 are preferably as low as possible. When the viscosity of the insulating liquid 243 is lowered, the mobility (response speed) of the migrating particles 241 is improved. In accordance with this, the energy (power consumption) required to move the migrating particles 241 is reduced. When the refractive index of the insulating liquid 243 is lowered, the difference in refractive index between the insulating liquid 243 and the porous layer 242 increases, and the reflectance of the porous layer 242 increases.

For example, a coloring agent, a charge adjusting agent, a dispersion stabilizer, a viscosity adjusting agent, a surfactant, or a resin may be added to the insulating liquid 243.

The migrating particles 241 are one or more charged particles and move through the pores 242H according to the electric field. The migrating particles 241 have, for example, arbitrary optical reflection characteristics (light reflectance), and a contrast (CR) is generated due to the difference between the light reflectance of the migrating particles 241 and the light reflectance of the porous layer 242. It is like that. For example, the migrating particles 241 may be brightly displayed and the porous layer 242 may be darkly displayed, the migrating particles 241 may be darkly displayed, and the porous layer 242 may be lightly displayed. Two or more (two or more colors) of migrating particles 241 may be used. In this case, a display device capable of displaying colors other than black and white can be configured.

When the electrophoretic element 24 is viewed from the outside, when the electrophoretic particles 241 are brightly displayed, the electrophoretic particles 241 are visually recognized as, for example, white or a color close to white. Visible in close color. The color of the migrating particles 241 is not particularly limited as long as contrast can be generated. For example, it may be red or blue.

The migrating particles 241 are made of particles (powder) such as organic pigments, inorganic pigments, dyes, carbon materials, metal materials, metal oxides, glass, or polymer materials (resins). One type of these may be used for the migrating particles 241, or two or more types may be used. The migrating particles 241 can also be composed of pulverized particles or capsule particles of resin solids containing the particles. Note that materials corresponding to the carbon material, metal material, metal oxide, glass, or polymer material are excluded from materials corresponding to organic pigments, inorganic pigments, or dyes. The particle diameter of the migrating particles 241 is preferably, for example, 10 nm to 500 nm, and more preferably 50 nm to 200 nm.

Examples of the organic pigments include azo pigments, metal complex azo pigments, polycondensed azo pigments, flavanthrone pigments, benzimidazolone pigments, phthalocyanine pigments, quinacridone pigments, anthraquinone pigments, and perylene pigments. Perinone pigments, anthrapyridine pigments, pyranthrone pigments, dioxazine pigments, thioindigo pigments, isoindolinone pigments, quinophthalone pigments or indanthrene pigments. Inorganic pigments include, for example, zinc white, antimony white, iron black, titanium boride, bengara, mapico yellow, red lead, cadmium yellow, zinc sulfide, lithopone, barium sulfide, cadmium selenide, calcium carbonate, barium sulfate, lead chromate Lead sulfate, barium carbonate, lead white or alumina white. Examples of the dye include nigrosine dyes, azo dyes, phthalocyanine dyes, quinophthalone dyes, anthraquinone dyes, and methine dyes. The carbon material is, for example, carbon black. The metal material is, for example, gold, silver or copper. Examples of metal oxides include titanium oxide, zinc oxide, zirconium oxide, barium titanate, potassium titanate, copper-chromium oxide, copper-manganese oxide, copper-iron-manganese oxide, and copper-chromium-manganese oxide. Or copper-iron-chromium oxide. The polymer material is, for example, a polymer compound in which a functional group having a light absorption region in the visible light region is introduced. If it is a high molecular compound which has a light absorption area | region in visible region, the kind will not be specifically limited.

The specific material of the migrating particle 241 is selected according to, for example, the role that the migrating particle 241 plays to cause contrast. When the migrating particles 241 display brightly, for example, a metal oxide such as titanium oxide, zinc oxide, zirconium oxide, barium titanate, or potassium titanate is used for the migrating particles 241. When the migrating particles 241 display darkly, the migrating particles 241 may be, for example, a carbon material such as carbon black or copper-chromium oxide, copper-manganese oxide, copper-iron-manganese oxide, copper-chromium-manganese oxide. In addition, metal oxides such as copper-iron-chromium oxide are used. Among these, it is preferable to use a carbon material for the migrating particles 241. The migrating particles 241 made of a carbon material exhibit excellent chemical stability, mobility and light absorption.

The content (concentration) of the migrating particles 241 in the insulating liquid 243 is not particularly limited, and is, for example, 0.1 wt% to 10 wt%. In this concentration range, the shielding property and mobility of the migrating particles 241 are ensured. Specifically, if the content of the migrating particles 241 is less than 0.1% by weight, the migrating particles 241 may be difficult to shield (hide) the porous layer 242 and may not be able to produce sufficient contrast. is there. On the other hand, when the content of the electrophoretic particles 241 is more than 10% by weight, the dispersibility of the electrophoretic particles 241 is lowered, and thus the electrophoretic particles 241 are difficult to migrate and may aggregate.

Note that the migrating particles 241 may be further subjected to a surface treatment in order to improve dispersibility in the insulating liquid 243. This surface treatment is, for example, rosin treatment, surfactant treatment, pigment derivative treatment, coupling agent treatment, graft polymerization treatment or μm encapsulation treatment. In particular, long-term dispersion stability of the migrating particles 241 can be further improved by performing a graft polymerization process, a μm encapsulation process, or a combination thereof.

It is preferable that the migrating particles 241 are easily dispersed and charged in the insulating liquid 243 for a long period of time and are difficult to be adsorbed on the porous layer 242. For this reason, for example, a dispersant is added to the insulating liquid 243. A dispersant and a charge control agent may be used in combination.

This dispersing agent or charge adjusting agent has, for example, a positive charge, a negative charge, or both, and increases the amount of charge in the insulating liquid 243, and causes the migrating particles 241 to repel electrostatic repulsion. It is for dispersing. Examples of such a dispersing agent include Solsperce series manufactured by Lubrizol, BYK series or Anti-Terra series manufactured by BYK-Chemical, or Span series manufactured by TCI America, and Hypermer series manufactured by Croda.

For details of the method for dispersing the migrating particles 241 in the insulating liquid 243, see “Ultrafine Particle Dispersion Technology and Its Evaluation—Surface Treatment / Fine Grinding and Dispersion Stabilization in Air / Liquid / Polymer— Science & Technology)).

The porous layer 242 can shield the migrating particles 241 and has a fibrous structure 242A and non-migrating particles 242B held by the fibrous structure 242A. The porous layer 242 is a three-dimensional structure (irregular network structure such as a nonwoven fabric) formed by the fibrous structure 242A, and is provided with a plurality of gaps (pores 242H). By forming the three-dimensional structure of the porous layer 242 with the fibrous structure 242A, light (external light) is irregularly reflected (multiple scattering), and the reflectance of the porous layer 242 is increased. Therefore, even when the thickness of the porous layer 242 is small, a high reflectance can be obtained, the contrast of the electrophoretic element 24 can be improved, and the energy required for moving the electrophoretic particles 241 can be reduced. Further, the average pore diameter of the pores 242H is increased, and many pores 242H are provided in the porous layer 242. As a result, the migrating particles 241 easily move via the pores 242H, the response speed is improved, and the energy required to move the migrating particles 241 is further reduced. The thickness of the porous layer 242 is, for example, 5 μm to 100 μm.

The fibrous structure 242A is a fibrous material having a sufficient length with respect to the fiber diameter (diameter). For example, a plurality of fibrous structures 242A are aggregated and randomly overlapped to form the porous layer 242. One fibrous structure 242A may be entangled randomly to form the porous layer 242. Or the porous layer 242 by one fibrous structure 242A and the porous layer 242 by the some fibrous structure 242A may be mixed.

The fibrous structure 242A extends linearly, for example. The shape of the fibrous structure 242A may be any shape. For example, the fibrous structure 242A may be shrunk or bent in the middle. Or fibrous structure 242A may be branched on the way.

The minimum fiber diameter of the fibrous structure 242A is preferably, for example, 500 nm or less, and more preferably 300 nm or less. The average fiber diameter is preferably 0.1 μm or more and 10 μm or less, for example, but may be outside the above range. By reducing the average fiber diameter, light is easily diffusely reflected, and the pore diameter of the pores 242H is increased. The fiber diameter is determined so that the fibrous structure 242A can hold the non-migrating particles 242B. The average fiber diameter can be measured, for example, by microscopic observation using a scanning electron microscope or the like. The average length of the fibrous structure 242A is arbitrary. The fibrous structure 242A is formed by, for example, a phase separation method, a phase inversion method, an electrostatic (electric field) spinning method, a melt spinning method, a wet spinning method, a dry spinning method, a gel spinning method, a sol-gel method, or a spray coating method. Is done. By using such a method, the fibrous structure 242A having a sufficient length with respect to the fiber diameter can be easily and stably formed.

The fibrous structure 242A is formed of at least one of a polymer material and an inorganic material, and is particularly preferably composed of nanofibers. Here, the nanofiber is a fibrous substance having a fiber diameter of 1 nm to 1000 nm and a length of 100 times or more of the fiber diameter. By using such nanofibers as the fibrous structure 242A, light is easily diffusely reflected, and the reflectance of the porous layer 242 can be further improved. That is, the contrast of the electrophoretic element 24 can be improved. In the fibrous structure 242A made of nanofibers, the proportion of the pores 242H in the unit volume increases, and the migrating particles 241 can easily move through the pores 242H. Therefore, the energy required to move the migrating particles 241 can be reduced. The fibrous structure 242A made of nanofibers is preferably formed by an electrostatic spinning method. By using the electrostatic spinning method, the fibrous structure 242A having a small fiber diameter can be easily and stably formed.

It is preferable to use a fibrous structure 242A having a light reflectance different from that of the migrating particles 241. Thereby, a contrast due to a difference in light reflectance between the porous layer 242 and the migrating particles 241 is easily formed. A fibrous structure 242A that exhibits light transparency (colorless and transparent) in the insulating liquid 243 may be used.

The pores 242H are configured by overlapping a plurality of fibrous structures 242A or entwining one fibrous structure 242A. The pores 242H preferably have as large an average pore diameter as possible so that the migrating particles 241 can easily move through the pores 242H. The average pore diameter of the pores 242H is, for example, not less than 0.1 μm and not more than 10 μm.

Non-migrating particles 242B are one or more particles that are fixed to the fibrous structure 242A and do not undergo electrophoresis. The non-migrating particles 242B may be embedded in the fibrous structure 242A that is held, or may be partially exposed from the fibrous structure 242A.

As the non-electrophoretic particles 242B, those having a light reflectance different from that of the electrophoretic particles 241 are used. The non-migrating particles 242B can be made of the same material as that of the migrating particles 241. Specifically, when the non-electrophoretic particle 242B (porous layer 242) displays brightly, the material when the electrophoretic particle 241 displays brightly, and when the non-electrophoretic particle 242B displays dark, the electrophoretic particle 241 darkens. Each material for display can be used. When performing a bright display with the porous layer 242, the non-migrating particles 242B are preferably made of a metal oxide. Thereby, it is possible to obtain excellent chemical stability, fixability and light reflectivity. The constituent materials of the non-migrating particles 242B and the migrating particles 241 may be the same or different. The color visually recognized from the outside when the non-electrophoretic particle 242B performs bright display or dark display is the same as that described for the electrophoretic particle 241.

As described above, the electrophoretic element 24 causes contrast due to the difference between the light reflectance of the migrating particles 241 and the light reflectance of the porous layer 242. Specifically, among the migrating particles 241 and the porous layer 242, the light reflectance for bright display is higher than the light reflectance for dark display. By performing such a display, the light reflectivity when a bright display is performed is remarkably increased by utilizing the irregular reflection of light by the porous layer 242 (three-dimensional structure). Accordingly, the contrast is remarkably improved accordingly.

The second substrate 31 is made of the same material as that of the first substrate 11, and preferably includes a stretchable material, for example. However, one of the first substrate 11 and the second substrate 31 (here, the second substrate 31) has optical transparency.

The second electrode 32 is formed on the entire surface of the second substrate 31, for example. The second electrode 32 preferably includes a conductive material (such as metal nanofibers, carbon and polythiophene conductive polymer) having the same stretchability as the first electrode 21. However, the second electrode 32 may be divided and arranged similarly to the first electrode 21. The second electrode 32 is not limited to the above-described stretchable material. For example, indium oxide-tin oxide (ITO), antimony oxide-tin oxide (ATO), fluorine-doped tin oxide (FTO), or aluminum A light-transmitting conductive material such as doped zinc oxide (AZO) may be used.

When displaying an image on the second substrate 31 side, since the electrophoretic element 24 is viewed through the second electrode 32, the light transmittance (transmittance) of the second electrode 32 should be as high as possible. For example, it is 80% or more. Further, the electric resistance of the second electrode 32 is preferably as low as possible, for example, 100Ω / □ or less.

(Configuration of partition wall 23)
Like the first substrate 11 and the second substrate 31, the constituent material of the partition wall 23 preferably includes a stretchable material. As the material having elasticity, the resin materials (natural rubber or synthetic rubber) mentioned as the material of the first substrate 11 can be used. The partition wall 23 may contain the same material as the 1st board | substrate 11 and the 2nd board | substrate 31, and may contain a different material. However, by using the same or the same kind of material for the partition wall 23 and the substrate material, adhesion between members is facilitated, and the yield is improved.

The Young's modulus of the partition wall 23 is desirably larger than the Young's modulus of the first substrate 11 and the second substrate 31. This is because the partition wall 23 is less likely to be deformed by a compressive stress generated along the Z-axis direction due to external pressure or the like, and electrical or structural destruction of the display layer 20 can be suppressed. Here, even if it is the same material, it is possible to change a Young's modulus by changing the hardening rate of the material. In view of the above adhesiveness, it is desirable that the partition wall 23 and the first substrate 11 and the second substrate 31 are formed so as to have different Young's moduli while using the same material.

The pitch and height of the partition walls 23 are not particularly limited and can be arbitrarily set. For example, the pitch of the partition walls 23 is, for example, 50 μm or more and 1000 μm or less, and the height of the partition walls 23 is, for example, 10 μm or more and 200 μm or less. It is preferable that the height of each partition wall 23 is substantially uniform. This is because the distance between the driving substrate 10 and the counter substrate 30 (so-called gap) is constant, and the electric field strength is made uniform. Thereby, the unevenness of the response speed in the display area is improved. The thickness (width) of the partition wall 23 is, for example, 5 μm or more and 20 μm or less.

In the present embodiment, the partition wall 23 includes a plurality of vertex portions in plan view (in the XY plane configuration of FIG. 1) and a plurality of vertex portions selectively connecting two vertex portions of these vertex portions. And a linear portion. In addition, below, the figure (shape) which comprises the partition 23 shall show the shape (pattern) in planar view except the case where it specifies. 3A to 3C show an example of the shape of the basic skeleton formed by connecting the apexes of the partition wall 23 with straight lines.

In the example shown in FIG. 3A, the partition wall 23 is a basic skeleton A1 in which, for example, an equilateral triangle having three apex portions (vertices) p1 is defined as one unit graphic A11, and a plurality of these unit graphics A11 are filled and arranged. Have In the unit graphic A11, a line segment connecting two adjacent vertex portions p1 is a straight line portion LS0.

In the example shown in FIG. 3B, for example, the partition wall 23 has a basic skeleton A2 in which a square shape having four apex portions (vertices) p2 is set as one unit graphic A21, and a plurality of these unit graphics A21 are filled and arranged. Have. In the unit graphic A21, a line segment connecting two adjacent vertex portions p2 is a straight line portion LS0. Here, the unit graphic A21 is shown as a square shape, but is not limited to a square shape, and may be a rectangular shape.

In the example shown in FIG. 3C, the partition wall 23 is a basic skeleton A3 in which a regular hexagonal shape having, for example, six apex portions (vertices) p3 is defined as one unit graphic A31, and a plurality of these unit graphics A31 are filled and arranged. Have In the unit graphic A31, a line segment connecting two adjacent vertex portions p3 is a straight line portion LS0.

In the partition wall 23 of the present embodiment, the straight line portion LS0 of the unit graphics A11 to A31 of the basic skeletons A1 to A3 is replaced with a linear portion (linear portions LS1, LS2, etc.) described below. Is. Here, as an example, the shape of the partition wall 23 corresponding to the basic skeleton A2 including the square unit graphic A21 will be described. However, the shape of the partition wall 23 can be similarly applied to the basic skeletons A1 and A3. Further, the present invention can also be applied to a basic skeleton having regular polygonal unit graphics other than a regular triangular shape, a square shape, and a regular hexagonal shape.

FIG. 4 schematically shows an example of the linear part (linear part LS1) constituting the partition wall 23. FIG. 5 schematically shows an example of the configuration of the partition wall 23 including the linear portion LS1. The partition wall 23 has a linear portion LS1 connecting the two vertex portions p2, and the linear portion LS1 has a length (extra length) larger than the shortest distance between the vertex portions p2 connected by the linear portion LS1. )have. In other words, the linear portion LS1 is configured to be longer than the straight portion LS0. The linear part LS1 has a curved part, for example. In this example, the linear portion LS1 has a gently curved shape from one apex portion p2 to the other apex portion p2 (the tangent of the linear portion LS1 continuously changes).

In the example of FIG. 5, all of the four straight portions LS0 of the unit graphic A21 are replaced with the linear portions LS1. Each linear part LS1 is formed only on one side (one side) of the straight line part LS0 (formed so as to be convex on one side). A region surrounded by these four linear portions LS1 corresponds to the cell 20A. Using such a linear portion LS1, it is desirable that the four linear portions LS1 be formed so that the areas of the cells 20A are the same, more preferably, the shapes of the cells 20A are the same. The unit graphic consisting of is filled and arranged (cells 20A are arranged and arranged).

FIG. 6 schematically shows another example of the linear part (linear part LS2) constituting the partition wall 23. FIG. 7 schematically shows an example of the configuration of the partition wall 23 including the linear portion LS2. The partition wall 23 has a linear portion LS2 connecting the two vertex portions p2, and the linear portion LS2 has a length (extra length) larger than the shortest distance between the vertex portions p2 connected by the linear portion LS2. )have. In other words, the linear part LS2 is configured to be longer than the straight line part LS0. The linear portion LS2 has, for example, a bent portion. In this example, the linear part LS1 has a bent shape at a local position between the two apex parts p2.

In the example of FIG. 7, all of the four straight portions LS0 of the unit graphic A21 are replaced with the linear portions LS2. Each linear part LS2 is formed only on one side (one side) of the linear part LS0 (formed so as to be convex on one side). A region surrounded by these four linear portions LS2 corresponds to the cell 20A. Using such a linear portion LS2, it is desirable that the four linear portions LS2 be formed so that the areas of the cells 20A are the same, more preferably, the shapes of the cells 20A are the same. A unit figure consisting of

These linear portions LS1 and LS2 desirably have a length of, for example, 110% or more of the shortest distance between the apex portions p2 (the length of the straight portion LS0), and for example, have a length of 120% or more. More desirable. For example, when it is desired to give a stretch rate of 20% to the display layer 20, the lengths of the linear portions LS1 and LS2 are set to 120% or more of the linear portion LS0.

5 and 7, all the straight portions LS0 of the basic skeleton A2 (unit graphic A21) are replaced with the linear portions LS1 or the linear portions LS2. However, the configuration is not limited to this, and at least one straight portion is used. The part LS0 only needs to be replaced with the linear parts LS1 and LS2. In other words, the partition wall 23 may be provided with the linear portion LS1 or the linear portion LS2 and the linear portion LS0 in a mixed manner. However, as in the present embodiment, the stretchability can be further improved when all the straight portions LS0 are replaced with the linear portions LS1 and LS2. The partition wall 23 may be provided with a mixture of linear portions having different shapes such as the linear portions LS1 and LS2. Furthermore, the area and shape of each cell 20A may be different. The configuration described here is merely an example and is not limited, and the partition wall 23 may take various other shapes.

However, each of these examples in FIGS. 5 and 7 has a relatively simple structure and does not require high resolution. In particular, it is desirable to include a curved shape like the linear portion LS1 shown in FIG. This is because it is easy to secure the process yield.

[Production method]
Such a display device 1 can be manufactured, for example, by the following method. 8 to 12 show an example of the manufacturing process of the display device 1. FIG.

First, as shown in FIG. 8, on a support substrate 110 made of glass or the like, for example, a metal oxide film (for example, WOx / MoOx film) or an organic insulating film (for example, CYTOP (registered trademark)) is configured. The released release layer 120 is formed. Subsequently, the second substrate 31 including the above-described material (for example, a stretchable resin material) is formed over the release layer 120. Examples of the method for forming the second substrate 31 include spin coating, air doctor coater, blade coater, rod coater, knife coater, squeeze coater, reverse roll coater, transfer roll coater, and gravure coater. Various coating methods such as a method, a kiss coater method, a cast coater method, a spray coater method, a slit orifice coater method, a calender coater method or a dipping method can be mentioned.

Subsequently, as illustrated in FIG. 9, the second electrode 32 including the above-described material (for example, a conductive material having elasticity) is formed on the second substrate 31.

Next, the partition wall 23 is formed on the second electrode 32. Specifically, first, as shown in FIG. 10A, the partition wall material (for example, a stretchable resin material) is formed on the second electrode 32 with the thickness described above. As a film forming method, the same coating method as that for the second substrate 31 can be used. Thereafter, as shown in FIG. 10B, the formed resin material is processed into a desired shape using, for example, photolithography or UV imprint. Thereby, the partition wall 23 including the linear portions LS1, LS2 and the like described above can be formed.

On the other hand, as shown in FIG. 11, a release layer 140 made of the same material as that of the second substrate 31 is formed on a flexible support substrate 130 made of PET or the like. On the peeling layer 140, the first substrate 11 including the above-described material (for example, a material having stretchability) is formed. As a film forming method for the first substrate 11, a coating method similar to that for the second substrate 31 can be used. Thereafter, a plurality of first electrodes 21 including the above-described material (for example, a conductive material having elasticity) are formed on the first substrate 11.

Thereafter, as shown in FIG. 12, the first substrate 11 on which the first electrode 21 is formed and the second substrate 31 on which the second electrode 32 and the partition wall 23 are formed are arranged with the display layer 20 in between. to paste together. At this time, specifically, the cell 20 </ b> A formed by the partition wall 23 on the second substrate 31 contains the migrating particles 241 and the porous layer 242 and is filled with the insulating liquid 243. On this, the 1st board | substrate 11 provided with the 1st electrode 21 is bonded together using the adhesion layer 22, and the cell 20A is sealed.

Finally, the support substrate 110 is peeled off from the second substrate 31, and the support substrate 130 is peeled off from the first substrate 11, thereby completing the display device 1 shown in FIG.

[Action and effect]
In the display device 1 according to the present embodiment, when a voltage is applied to the display layer 20 through the first electrode 21 and the second electrode 32, each cell 20A is accommodated according to the polarity and magnitude of the applied voltage. The migrated particles 241 move between the first electrode 21 and the second electrode 32. Thereby, for each region (pixel, display unit region) corresponding to the first electrode 21, a color corresponding to the light reflectance of one or both of the migrating particles 241 and the porous layer 242 can be displayed. Characters, designs, and the like can be displayed on the upper surface of the second substrate 31 of the display device 1.

When this display device 1 is applied to a display that is particularly stretchable, the partition wall 23 is subjected to tensile or compressive stress due to deformation due to expansion and contraction. Even when the display device 1 is applied to a flexible display, the partition wall 23 is not less stressed due to deformation caused by bending. However, since the partition wall is generally a mesh-like structure for spatially partitioning the cell 20A, the degree of freedom for deformation is small. For this reason, when the stress with respect to bending or expansion / contraction is applied to the partition, the partition may be damaged or destroyed. As a result, it becomes difficult to keep the migrating particles in a certain area, and deviation occurs in the display surface. In addition, the cell thickness cannot be maintained at a constant size over the entire display surface, and the display quality deteriorates with time or according to usage conditions.

For example, when stress is generated in the partition due to the above-described deformation, the partition is broken, for example, from the interface with the electrode, or the partition is cracked, and the structure is destroyed.

For this reason, in the partition wall 23, it is desirable to improve the degree of freedom (flexibility) with respect to deformation as described above. In order to ensure flexibility, it is conceivable to use a flexible material for the partition wall 23 itself, but this is in a trade-off relationship with mechanical reliability. Since the cell 20A is a sealed space, there is a concern that the pressure inside the cell 20A increases due to external pressure applied to the cell 20A and the structure of the mechanically fragile partition wall 23 is damaged. The

Here, FIG. 13 shows a configuration of a partition wall (partition wall 102) according to a comparative example of the present embodiment. In this comparative example, a partial region (region 102B) of the partition wall 102 is thinned out, and the partition wall 102 is subdivided into a plurality of straight line portions. Due to the subdivision, the partition wall 102 can easily follow the deformation as described above. Further, since the liquid containing the migrating particles 103 in the cell 102A can be fluidly moved to the other cell 102A through the region 102B, the pressure can be relieved even when pressure (pressing) is applied from the outside. Is possible. However, in this structure, the migrating particles 103 move between the fluidly different cells 102A, and the migrating particles 103 are biased (it is difficult to keep the migrating particles 103 in a certain area). As described above, the migrating particles 103 move between the cells 102A due to an applied electric field or other external factors, causing a deviation in the display surface, and the display quality is improved with the passage of time or depending on the use state. It will decline.

On the other hand, in the present embodiment, the partition wall 23 has three or more vertex portions (for example, the vertex portion p2) and the vertex portions p2 in plan view as shown in FIGS. 4 and 5, for example. And a plurality of linear parts (for example, linear part LS1) connecting the two apex parts p2. Each of the plurality of linear portions LS1 has a length greater than the shortest distance (the length of the straight portion LS0) between the vertex portions p2 connected by the linear portion LS1.

Thereby, when the display device 1 is deformed due to bending, expansion and contraction, etc., structural deformation and expansion and contraction of the partition wall 23 occur before elastic deformation of the material of the partition wall 23 itself. That is, for example, when a tensile stress is generated along the extending direction of the partition wall 23 having a curved linear portion, the partition wall 23 is first deformed into a shape obtained by extending the original shape linearly. Thereafter, it is elastically deformed by further tensile stress. For this reason, the stretchability of the whole partition 23 improves, and the stress concerning the partition 23 can be relieved. In particular, the tensile stress applied to the partition wall 23 can be relaxed along the in-plane direction (the direction along the XY plane in FIG. 1). It becomes possible to follow larger expansion and contraction, and the degree of freedom for deformation is improved.

In addition, since the Young's modulus of the constituent material of the partition wall 23 is larger than the Young's modulus of the constituent material of the first substrate 11 and the second substrate 31, the partition wall 23 particularly in the vertical direction (Z-axis direction in FIG. 1). The compressive stress concerning can be relieved. Thereby, the partition wall 23 is hardly deformed by pressing or the like, and it is possible to suppress the occurrence of electrical or structural breakdown in the display layer 20.

As described above, in the present embodiment, the partition wall 23 that is sealed between the first substrate 11 and the second substrate 31 and divides the display layer 20 including the migrating particles 241 into a plurality of cells 20A is provided. It has been. The partition wall 23 includes a plurality of linear portions LS1 that connect two optional vertex portions p2 among the three or more vertex portions p2 in plan view. Since each of the plurality of linear portions LS1 has a length larger than the shortest distance between the two apex portions p2 connected by the linear portion LS1, the entire apparatus is deformed due to bending or the like. In this case, the stress applied to the partition wall 23 can be relaxed. The partition wall 23 can improve the flexibility of deformation while suppressing the bias of the migrating particles 241. Therefore, display quality can be improved.

Next, a modification of the above embodiment will be described. Constituent elements similar to those in the above embodiment are given the same reference numerals, and descriptions thereof are omitted as appropriate.

In the above embodiment, the configuration in which the linear portions LS1, LS2 of the partition wall 23 are formed only on one side of the linear portion LS0 of the basic skeleton A2 is exemplified. LS2 may be formed to intersect with the straight line portion LS0. Examples thereof are shown in the following modified examples 1 to 3. Moreover, in the said embodiment, although each linear part LS1, LS2 of the partition 23 illustrated the structure curved or bent as a whole toward the other vertex part p2 from one vertex part p2, to this, Without being limited, the linear portions LS1 and LS2 may have a portion that matches the straight portion LS0. In each of the configurations of Modifications 1 to 4, the same effects as in the above embodiment can be obtained.

<Modification 1>
FIG. 14 schematically illustrates a linear portion (linear portion LS3) that configures the partition wall 23 according to the first modification. FIG. 15 schematically shows an example of the configuration of the partition wall 23 including the linear portion LS3. The partition wall 23 of this modification has a linear portion LS3 that connects the two apex portions p2, and this linear portion LS3 is similar to the linear portions LS1 and LS2 of the above embodiment. Has a length greater than the shortest distance between the apexes p2 connected by the. In other words, the linear portion LS3 is configured to be longer than the linear portion LS0. The linear part LS3 has a curved part, for example. In this example, the linear portion LS3 has a gently curved shape from one apex portion p2 to the other apex portion p2 (the tangent of the linear portion LS3 continuously changes). In the example of FIG. 15, all of the straight line portions LS0 are replaced with linear portions LS3.

However, in this modification, each linear portion LS3 is formed to intersect with the straight portion LS0 once (has one intersection 23a). That is, each linear part LS3 is formed on both sides of the straight line part LS0. A region surrounded by these four linear portions LS4 corresponds to the cell 20A. Using such a linear portion LS3, preferably, the four linear portions LS3 are formed so that the areas of the cells 20A are the same, more preferably, the shapes of the cells 20A are the same. A unit figure consisting of

<Modification 2>
FIG. 16 schematically illustrates a linear portion (linear portion LS4) that configures the partition wall 23 according to the second modification. FIG. 17 schematically shows an example of the configuration of the partition wall 23 including the linear portion LS4. The partition wall 23 of the present modification has a linear portion LS4 connecting the two apex portions p2, and this linear portion LS4 is the linear portion LS4, like the linear portions LS1 and LS2 of the above embodiment. Has a length greater than the shortest distance between the apexes p2 connected by the. In other words, the linear portion LS4 is configured to be longer than the straight portion LS0. The linear portion LS4 has, for example, a bent portion. In this example, the linear portion LS4 has a shape bent at a local position between the two apex portions p2. In the example of FIG. 17, all of the straight line portions LS0 are replaced with linear portions LS4.

However, in this modification, each linear portion LS4 is formed to intersect with the straight portion LS0 once (has one intersection 23b). That is, each linear part LS4 is formed on both sides of the straight line part LS0. A region surrounded by these four linear portions LS4 corresponds to the cell 20A. Using such a linear portion LS4, the four linear portions LS4 are desirably formed so that the areas of the cells 20A are the same, and more desirably, the shapes of the cells 20A are the same. A unit figure consisting of

<Modification 3>
FIG. 18 schematically illustrates a linear portion (linear portion LS5) that configures the partition wall 23 according to Modification 3. FIG. 19 schematically shows an example of the configuration of the partition wall 23 including the linear portion LS5. The partition wall 23 of the present modification has a linear part LS5 connecting the two apex parts p2, and this linear part LS5 is the linear part LS5, like the linear parts LS1 and LS2 of the above embodiment. Has a length greater than the shortest distance between the apexes p2 connected by the. In other words, the linear portion LS5 is configured to be longer than the straight portion LS0. The linear portion LS5 has, for example, a curved portion. In this example, the linear portion LS5 has a gently curved shape from one apex portion p2 to the other apex portion p2 (the tangent of the linear portion LS5 continuously changes). In the example of FIG. 19, all of the straight line portions LS0 are replaced with linear portions LS5.

However, in this modification, each linear part LS5 is formed to intersect with the straight line part LS0 twice (having two intersections 23c). That is, each linear part LS5 is formed on both sides of the straight line part LS0. A region surrounded by these four linear portions LS5 corresponds to the cell 20A. Using such a linear portion LS5, preferably, the four linear portions LS5 are formed so that the areas of the cells 20A are the same, more preferably, the shapes of the cells 20A are the same. A unit figure consisting of Although not particularly illustrated, the linear portion that intersects the straight portion LS0 twice may have a bent portion.

<Modification 4>
FIG. 20 schematically illustrates the linear portion (linear portion LS6) that configures the partition wall 23 according to Modification 4. FIG. 21 schematically shows an example of the configuration of the partition wall 23 including the linear portion LS6. The partition wall 23 of this modification has a linear portion LS6 that connects the two apex portions p2, and this linear portion LS6 is similar to the linear portions LS1 and LS2 of the above embodiment. Has a length greater than the shortest distance between the apexes p2 connected by the. In other words, the linear portion LS6 is configured to be longer than the straight portion LS0. The linear portion LS6 has, for example, a curved portion (curved portion LS61). In the example of FIG. 21, all of the straight line portions LS0 are replaced with linear portions LS6.

However, in the present modification, the linear portion LS6 has a portion (two straight portions LS62) that coincides with the straight portion LS0 together with one curved portion LS61. The curved portion LS61 has a gently curved shape (the tangent line of the curved portion LS61 continuously changes). Two or more curved portions LS61 may be formed. The number of straight line portions LS62 may be one, or three or more.

<Application example>
Next, an application example of the display device 1 according to the above embodiment will be described. The display device 1 can be applied to electronic devices for various uses, and the type of the electronic device is not particularly limited. This display device 1 can be mounted on, for example, the following electronic devices. However, the configuration of the electronic device described below is merely an example, and the configuration can be changed as appropriate.

(Application example 1)
22A and 22B show the external configuration of an electronic book. The electronic book includes, for example, a display unit 210, a non-display unit 220, and an operation unit 230. Note that the operation unit 230 may be provided on the front surface of the non-display unit 220 as illustrated in FIG. 22A, or may be provided on the upper surface as illustrated in FIG. 22B. The display unit 210 is configured by the display device 1. The display device 1 may be mounted on a PDA (Personal Digital Assistants) having the same configuration as the electronic book shown in FIGS. 22A and 22B.

(Application example 2)
In addition to the electronic book and tablet personal computer described above, the display device 1 can be applied as a so-called wearable terminal to a part of clothing such as a bag, clothes, a hat, glasses, and shoes. . Below, an example of such an electronic device integrated with clothing is shown. The configuration shown here is merely an example, and the configuration can be changed as appropriate.

FIG. 23A and FIG. 23B show the appearance of a bag (bag) on which the display device 1 is mounted. The bag has, for example, a storage unit 310 and a handle 320, and the display device 1 is used for the storage unit 310 among these, for example. Thereby, the surface of the storage unit 310 can be made entirely white (plain) as shown in FIG. 23A, for example, or can be a black and white lattice pattern as shown in FIG. 23B, for example. Also, this color and pattern can be maintained even after the power is turned off.

(Application example 3)
Further, the display device 1 can be applied to, for example, interior use in addition to the above fashion use. FIG. 24 shows the appearance of the wall surface 400 on which the display device 1 is mounted. In this way, the display device 1 can be fixed to the wall surface 400 of the room and used as a cross whose color and pattern change.

Further, although not shown, the display device 1 can be applied to an interior seat such as an automobile. In the interior of a car, since the seat is stretched with respect to a curved surface instead of a flat surface, the display device 1 having flexibility with respect to deformation such as bending and expansion / contraction is preferable.

As described above, the present disclosure has been described with the embodiment and the modification. However, the present disclosure is not limited to the above-described embodiment and the like, and various modifications are possible. Moreover, the effect described in this specification is an illustration to the last, and is not limited, There may exist another effect.

The present disclosure may be configured as follows.
(1)
A first substrate;
A plurality of first electrodes provided on the first substrate;
A second substrate disposed opposite the first substrate;
A second electrode formed on the first electrode side of the second substrate;
A display layer sealed between the first substrate and the second substrate and including migrating particles;
A partition that divides the display layer into a plurality of element regions,
The partition includes three or more vertex portions in plan view and one or more linear portions connecting two optional vertex portions of the three or more vertex portions,
Each linear part has a length greater than the shortest distance between two apex parts connected by the linear part.
(2)
Each linear part has a length of 110% or more of the shortest distance between two apex parts connected by the linear part. The display device according to (1).
(3)
Each linear part has a length of 120% or more of the shortest distance between two apex parts connected by the linear part. The display device according to (2) above.
(4)
Each linear portion includes a curved or bent portion. The display device according to any one of (1) to (3).
(5)
Each linear part is formed only on one side of a straight line having two apex parts connected by the linear part as ends in a plan view. Any one of the above (1) to (4) The display device described in one.
(6)
Each of the linear portions is formed so as to intersect with a straight line having two vertex portions connected by the linear portions as ends in one or a plurality of locations in plan view. The display device according to any one of the above.
(7)
The display device according to any one of (1) to (6), wherein areas of the plurality of element regions are the same.
(8)
The display device according to any one of (1) to (7), wherein the plurality of element regions have the same shape in plan view.
(9)
The display device according to any one of (1) to (8), wherein the plurality of element regions are laid out in a plan view.
(10)
The display device according to any one of (1) to (9), wherein a basic skeleton formed by connecting the vertex portions of the partition walls with a straight line has a regular polygonal shape in a plan view.
(11)
The display device according to (10), wherein the regular polygonal shape is a regular triangular shape, a square shape, or a regular hexagonal shape.
(12)
The display device according to any one of (1) to (11), wherein the partition wall has elasticity.
(13)
The display device according to any one of (1) to (12), wherein the first substrate and the second substrate have elasticity.
(14)
The display device according to any one of (1) to (13), wherein a Young's modulus of a constituent material of the partition wall is larger than a Young's modulus of the first substrate and the second substrate.
(15)
A first substrate;
A plurality of first electrodes provided on the first substrate;
A second substrate disposed opposite the first substrate;
A second electrode formed on the first electrode side of the second substrate;
A display layer sealed between the first substrate and the second substrate and including migrating particles;
A partition that divides the display layer into a plurality of element regions,
The partition includes three or more vertex portions in plan view and one or more linear portions connecting two optional vertex portions of the three or more vertex portions,
Each linear part has a length greater than the shortest distance between two apex parts connected by the linear part. An electronic apparatus comprising a display device.

This application claims priority on the basis of Japanese Patent Application No. 2016-146559 filed on July 26, 2016 at the Japan Patent Office. The entire contents of this application are incorporated herein by reference. This is incorporated into the application.

Those skilled in the art will envision various modifications, combinations, subcombinations, and changes, depending on design requirements and other factors, which are within the scope of the appended claims and their equivalents. It is understood that

Claims (15)

A first substrate;
A plurality of first electrodes provided on the first substrate;
A second substrate disposed opposite the first substrate;
A second electrode formed on the first electrode side of the second substrate;
A display layer sealed between the first substrate and the second substrate and including migrating particles;
A partition that divides the display layer into a plurality of element regions,
The partition includes three or more vertex portions in plan view and one or more linear portions connecting two optional vertex portions of the three or more vertex portions,
Each linear part has a length greater than the shortest distance between two apex parts connected by the linear part. The display device according to claim 1, wherein each linear portion has a length of 110% or more of a shortest distance between two vertex portions connected by the linear portion. The display device according to claim 2, wherein each linear portion has a length of 120% or more of a shortest distance between two vertex portions connected by the linear portion. The display device according to claim 1, wherein each linear portion includes a curved or bent portion. 2. The display device according to claim 1, wherein each linear portion is formed only on one side of a straight line having two vertex portions connected by the linear portion as ends in a plan view. The display device according to claim 1, wherein each linear portion is formed so as to intersect with a straight line having two vertex portions connected by the linear portion as ends in one or a plurality of places in plan view. The display device according to claim 1, wherein areas of the plurality of element regions are the same. The display device according to claim 1, wherein the plurality of element regions have the same shape in a plan view. The display device according to claim 1, wherein the plurality of element regions are laid out in a plan view. The display device according to claim 1, wherein a basic skeleton formed by connecting the vertex portions of the partition walls with a straight line has a regular polygonal shape in a plan view. The display device according to claim 10, wherein the regular polygonal shape is a regular triangular shape, a square shape, or a regular hexagonal shape. The display device according to claim 1, wherein the partition wall has elasticity. The display device according to claim 1, wherein the first substrate and the second substrate have elasticity. The display device according to claim 1, wherein a Young's modulus of a constituent material of the partition wall is larger than Young's modulus of the first substrate and the second substrate. A first substrate;
A plurality of first electrodes provided on the first substrate;
A second substrate disposed opposite the first substrate;
A second electrode formed on the first electrode side of the second substrate;
A display layer sealed between the first substrate and the second substrate and including migrating particles;
A partition that divides the display layer into a plurality of element regions,
The partition includes three or more vertex portions in plan view and one or more linear portions connecting two optional vertex portions of the three or more vertex portions,
Each linear part has a length greater than the shortest distance between two apex parts connected by the linear part. An electronic apparatus comprising a display device.

Images