WO2007004396A1

WO2007004396A1 - Method for manufacturing electrophoretic display medium, and electrophoretic display medium

Info

Publication number: WO2007004396A1
Application number: PCT/JP2006/311923
Authority: WO
Inventors: Yoshito Toyoda
Original assignee: Brother Kogyo Kabushiki Kaisha
Priority date: 2005-06-30
Filing date: 2006-06-14
Publication date: 2007-01-11
Also published as: JP2007010965A

Abstract

A first substrate (120) and a second substrate (110) are arranged by having at least a distance between a plane, which is of a partitioning member (123) arranged on the first substrate (120) and faces the second substrate (110), and the second substrate (110) to be wide when charged particles (305) are applied and to be narrow when being sealed or displaying an image so that the charged particles (305) do not freely pass through.

Description

Specification

Method for producing electrophoretic display medium and electrophoretic display medium

Technical field

The present invention relates to an electrophoretic display medium manufacturing method and an electrophoretic display medium.

Background art

Conventionally, an electrophoretic display medium is known as a medium for displaying an image. In the electrophoretic display medium, an electric field is applied to charged particles filled between a pair of substrates that are paired with a substrate serving as a display surface and a substrate serving as a display surface. Can be moved to. Such control is performed, and the charged particles are moved to the display surface, whereby the color of the charged particles is displayed on the display surface. Thereby, an image can be displayed.

[0003] Japanese Patent No. 3189958 (Patent Document 1) has two substrates each having a partition member for partitioning a space between substrates into a plurality of partition chambers. An electrophoretic display medium is disclosed in which each substrate is disposed in a direction in which the respective partition members face each other, and a gap is provided between the facing partition members so that charged particles can freely pass therethrough. ing.

Disclosure of the invention

Problems to be solved by the invention

[0004] However, when a gap is provided between the two partition members so that charged particles can freely pass therethrough as in the electrophoretic display medium described in Patent Document 1, the electrophoretic display medium When charged and used, the charged particles detached from the display surface due to the influence of vibration or the like can easily move to other compartments through the gap when they settle by gravity. As a result, the quality of the charged particles is uniform due to the compartments, that is, the display image is uneven, so that the display quality is degraded.

[0005] The present invention has been made to solve the above-described problems, and provides an electrophoretic display medium manufacturing method and an electrophoretic display medium that do not cause display image unevenness and display quality is good. The purpose is to do. Means for solving the problem

In order to achieve this object, an electrophoretic display medium manufacturing method according to claim 1 includes a pair of substrates each including a first substrate and a second substrate, and at least a partition portion on the first substrate. A method for producing an electrophoretic display medium in which a liquid chamber provided with a material and filled with a display liquid composed of charged particles and a dispersion medium for dispersing the charged particles in a liquid chamber partitioned by the pair of substrates and the partition member A first opposing surface of the partition member provided on the first substrate facing the second substrate or the partition member provided on the second substrate, and provided on the second substrate or the second substrate. A display liquid disposition that disposes the display liquid on at least the first substrate in a state in which a gap between the partition member and the second facing surface facing the first facing surface is separated from a predetermined distance. Before the process and the display liquid arranging process Arrangement of the pair of substrates so that the charged particles cannot pass freely through the gap between the first opposing surface and the second opposing surface, and the substrate arranging step. And a fixing step of fixing the pair of substrates to each other.

[0007] In the method for manufacturing an electrophoretic display medium according to claim 2, the charged particles are substantially spherical, and the predetermined distance of the gap is five times the average particle diameter of the charged particles in the substrate arranging step. The pair of substrates is arranged as follows.

[0008] In the method for manufacturing an electrophoretic display medium according to claim 3, an electrode is provided on at least one of the first opposing surface and the precursor second opposing surface, and the gap is disposed in the substrate arranging step. The force applied to the charged particles in the liquid chamber from the electric field generated by the voltage applied to the electrode even if the charged particles exist between the first facing surface and the second facing surface. The pair of substrates are arranged so that the distances are substantially the same.

[0009] Further, in the method for manufacturing an electrophoretic display medium according to claim 4, the charged particles are substantially spherical, and the predetermined distance of the gap is one time the average particle diameter of the charged particles in the substrate arranging step. As described above, the pair of substrates is arranged.

[0010] Further, in the method for manufacturing an electrophoretic display medium according to claim 5, the display liquid is filled between the pair of substrates in a state where the pair of substrates are opposed to each other in the display liquid arranging step. This is the special number. [0011] Further, in the method for manufacturing an electrophoretic display medium according to claim 6, a contact member is provided at least on the partition member or the first substrate provided on the first substrate, and the substrate arranging step The contact body is in contact with a second substrate or a partition member provided on the second substrate.

[0012] In the method of manufacturing an electrophoretic display medium according to claim 7, the partition member protrudes from the first substrate or the second substrate, and the first facing surface or the second facing surface is defined. An end surface, and the contact body is provided on an end surface of the partition member and has an end surface protruding from the end surface of the partition member, and the end surface of the contact body is smaller than the end surface of the partition member, It is characterized by that.

[0013] Further, the method for manufacturing an electrophoretic display medium according to claim 8 is characterized in that, in the substrate arranging step, the pair of substrates are arranged while applying vibration.

[0014] Further, in the method for manufacturing an electrophoretic display medium according to claim 9, at least the first substrate is made of a thermoplastic resin or a stimulus curable resin so as to surround a display area for displaying an image. A frame member disposing step of disposing a frame member, wherein at least one of the pair of substrates or the frame member is formed with an inlet for filling the display liquid; In the state where the distance between the first facing surface and the second facing surface is separated from the predetermined distance of the gap, the display liquid is injected from the inlet and filled between the pair of substrates, In the substrate placement step, at least the second substrate is moved closer to the first substrate, the height of the frame member is reduced to place the pair of substrates, and after the fixing step, the implantation is performed. And having a sealing step of sealing the.

[0015] Further, in the method for manufacturing an electrophoretic display medium according to claim 10, at least the first substrate is made of a thermoplastic resin or a stimulus curable resin so as to surround a display area for displaying an image. A frame member arranging step of arranging a frame member, wherein at least one of the pair of substrates or the frame member is formed with an inlet and an outlet for filling the display liquid, and the display liquid In the disposing step, the display liquid is injected from the injection port between the pair of substrates in a state where the distance between the first facing surface and the second facing surface is separated from the predetermined distance of the gap. Surplus while filling Discharging the display liquid from the discharge port, in the substrate placement step, moving at least the second substrate closer to the first substrate, reducing the height of the frame member, and placing the pair of substrates, After the fixing step, a sealing step for sealing the inlet and the outlet is provided.

[0016] Further, the method for manufacturing an electrophoretic display medium according to claim 11 is characterized in that, in the substrate arranging step, the frame member is in an elastic state.

[0017] Further, in the method for manufacturing an electrophoretic display medium according to claim 12, the frame member is a thermoplastic resin, and in the substrate arranging step, the frame member is heated and softened while at least one of the substrates. The pair of substrates is arranged by moving the substrate closer to the other substrate, and in the fixing step, the frame member is cooled to fix the distance between the pair of substrates.

[0018] Further, in the method for manufacturing an electrophoretic display medium according to claim 13, the frame member is a thermosetting resin that is cured by stimulation by heating, and the frame member is heated in the fixing step. It is characterized in that the distance between the pair of substrates is fixed by curing.

[0019] In the method for manufacturing an electrophoretic display medium according to claim 14, the frame member is a photo-curing resin that is cured by light stimulation, and the frame member is cured by light irradiation in the fixing step. Thus, the distance between the pair of substrates is fixed.

[0020] The method for producing an electrophoretic display medium according to claim 15 is characterized in that the photocurable resin is an ultraviolet curable resin that is cured by irradiating ultraviolet rays.

[0021] In addition, the electrophoretic display medium according to claim 16 includes a pair of substrates formed of a first substrate and a second substrate, at least a partition member provided on the first substrate, and the pair of substrates. In an electrophoretic display medium in which a liquid chamber partitioned by a display liquid composed of charged particles and a dispersion medium for dispersing the charged particles is filled, the first of the partition members provided on the first substrate. A first facing surface facing the partition member provided on the second substrate or the second substrate, and a second facing surface facing the first facing surface of the partition member provided on the second substrate or the second substrate In a state where the gap between the At least a display liquid disposing step for disposing a display liquid on the first substrate, and after the display liquid disposing step, the charged particles cannot freely pass through the distance between the first facing surface and the second facing surface. Manufactured by an electrophoretic display medium manufacturing method comprising a substrate disposing step of disposing the pair of substrates so as to be a predetermined distance of a gap.

[0022] In addition, the electrophoretic display medium according to Claim 17 includes a pair of substrates each including a first substrate and a second substrate, a partition member provided on the first substrate, or the partition member and the A partition member provided on the second substrate, and a liquid chamber partitioned by the pair of substrates and the partition member is filled with a display liquid composed of charged particles and a dispersion medium for dispersing the charged particles. In the electrophoretic display medium, the first opposing surface provided on the partition member provided on the first substrate and facing the second substrate or the partition member provided on the second substrate, and the second substrate Alternatively, the distance between the second opposing surface provided on the partition member provided on the second substrate and facing the first opposing surface is set to be a predetermined distance of a gap through which the charged particles cannot freely pass. A pair of substrates is arranged.

[0023] The electrophoretic display medium according to claim 18 is characterized in that the charged particles are substantially spherical, and a predetermined distance of the gap is 5 times or less of an average particle diameter of the charged particles.

[0024] Further, in the electrophoretic display medium according to claim 19, an electrode is provided on at least one of the first facing surface and the precursor second facing surface, and the predetermined distance of the gap is the first facing surface. Even if the charged particles are present between the surface and the second opposing surface, the distance applied to the charged particles in the liquid chamber from the electric field generated by the voltage applied to the electrode is substantially the same. It is characterized by.

[0025] Further, the electrophoretic display medium according to claim 20, wherein the charged particles are substantially spherical, and a predetermined distance of the gap is one or more times an average particle diameter of the charged particles.

[0026] In addition, the electrophoretic display medium according to claim 21 is provided on at least a part of a tip of the partition member provided on the first substrate that protrudes from the first substrate. It is characterized in that an abutting body in contact with the partition member provided on the substrate or the second substrate is provided.

[0027] Further, in the electrophoretic display medium according to claim 22, the partition member provided on the first substrate has an end surface that protrudes from the first substrate and that defines the first facing surface, Said The contact body is provided on an end surface of the partition member and has an end surface protruding from the end surface of the partition member, and the end surface of the contact body is smaller than the end surface of the partition member.

[0028] In addition, the electrophoretic display medium according to claim 23 is a thermoplastic resin that is provided in close contact with the pair of substrates between the pair of substrates and surrounds a display area for displaying an image. A frame member made of resin or stimulus-curable resin is provided.

[0029] Further, in the electrophoretic display medium according to claim 24, the frame member is a thermoplastic resin.

[0030] In addition, the electrophoretic display medium according to claim 25 is characterized in that the frame member is a thermosetting resin that is cured by stimulation by heating.

[0031] Further, the electrophoretic display medium according to claim 26 is characterized in that the frame member is a photo-curing resin that is cured by light stimulation.

[0032] The electrophoretic display medium according to claim 27 is characterized in that the photocurable resin is an ultraviolet curable resin that is cured by irradiating ultraviolet rays.

The invention's effect

[0033] According to the method for manufacturing an electrophoretic display medium of claim 1, in the substrate disposing step, the charged particles can freely pass through the distance between the first facing surface and the second facing surface. Since the pair of substrates are arranged so as to have a predetermined distance that cannot be performed, the charged particles do not move between the liquid chambers, so that the display image does not become uneven and an electrophoretic display medium with good display quality can be easily obtained. Can be manufactured.

[0034] Further, according to the method for manufacturing an electrophoretic display medium according to claim 2, in addition to the effect of the invention according to claim 1, in the substrate placement step, the predetermined distance is an average of the charged particles. The pair of substrates is arranged so that the particle diameter is 5 times or less. If the predetermined distance of the gap is not more than 5 times the average particle diameter of the charged particles, the charged particles do not move between the liquid chambers, so that the display image does not become uneven and the electrophoretic display medium has better display quality. Can be easily manufactured.

[0035] According to the method for manufacturing an electrophoretic display medium of claim 3, in the substrate placement step, the predetermined distance is such that the partition member of one substrate and the other substrate or the other substrate Even if the charged particles exist between the partition members of the substrate, the distance applied to the charged particles in the liquid chamber from the electric field generated by the voltage applied to the electrodes is substantially the same, that is, the electrophoretic display. The pair of substrates are arranged so that the force applied to the charged particles in each of the liquid chambers in the entire medium is substantially uniform, so that the display image is not uneven and the display quality is good. Can be manufactured.

[0036] Further, according to the method for manufacturing an electrophoretic display medium according to claim 4, in addition to the effect of the invention according to claim 3, in the substrate placement step, the predetermined distance is an average of the charged particles. The pair of substrates is arranged so that the particle diameter is 1 times or more. Since the predetermined distance of the gap is one or more times the average particle diameter of the charged particles, even if one charged particle is sandwiched between the first opposed surface and the second opposed surface, Since the force applied to the charged particles is substantially the same, the display image does not become uneven.

[0037] According to the method for manufacturing an electrophoretic display medium of claim 5, in the display liquid disposing step, the display liquid is filled between the pair of substrates with the pair of substrates facing each other. Therefore, it is possible to easily manufacture an electrophoretic display medium in which bubbles are easily removed and display quality is better.

[0038] According to the method for manufacturing an electrophoretic display medium according to claim 6, the distance between the substrates can be accurately maintained by the contact body, and a larger electrophoretic display medium can be manufactured. .

[0039] Further, according to the method for manufacturing an electrophoretic display medium according to claim 7, in addition to the effect of the invention according to claim 5, the contact body and the second substrate or a partition member of the second substrate The charged particles are less likely to be sandwiched between the two, so that the uniformity of the predetermined distance in the entire electrophoretic display medium is increased, and the display image can be made more uniform. As a result, an electrophoretic display medium having better display quality Can be manufactured.

[0040] Further, according to the method for manufacturing an electrophoretic display medium according to claim 8, the pair of substrates are arranged while applying vibration to the pair of substrates in the substrate arranging step. The uniformity of the predetermined distance in the whole increases, and the display image can be made more uniform. As a result, an electrophoretic display medium with better display quality can be manufactured. [0041] According to the method for manufacturing an electrophoretic display medium according to claim 9, in the display liquid arranging step, the distance between the first facing surface and the second facing surface is set by the frame member. The display liquid is filled from the injection port between the pair of substrates in a state separated from a predetermined distance, and the height of the frame member is reduced until the predetermined distance is reached in the substrate placement step. Since the pair of substrates are arranged, it is easy to remove bubbles and the display liquid can be filled uniformly, and as a result, an electrophoretic display medium with better display quality can be manufactured. .

[0042] Further, according to the method for manufacturing an electrophoretic display medium according to claim 10, in the display liquid arranging step, the distance between the first facing surface and the second facing surface is set by the frame member. In a state separated from a predetermined distance, the display liquid is discharged from the discharge port while filling the display liquid from the injection port between the pair of substrates, and the substrate placement step is performed. Since the pair of substrates are arranged by reducing the height of the frame member to the predetermined distance, it is easy to remove bubbles and can uniformly fill the display liquid S. As a result, An electrophoretic display medium with better display quality can be manufactured.

[0043] According to the method for manufacturing an electrophoretic display medium according to claim 11, in addition to the effect produced by the invention according to claim 9 or claim 10, in the frame member arranging step, Since the frame member is disposed in a state where the frame member has elasticity, the liquid chamber is highly sealed in the substrate disposing step.

[0044] Further, according to the method for producing an electrophoretic display medium according to claim 12, in addition to the effect produced by the invention according to claim 9 or claim 10, thermoplasticity is provided in the frame member arranging step. Since the frame member made of resin is arranged, the pair of substrates can be easily arranged in the substrate arranging step, and as a result, the electrophoretic display medium can be manufactured more easily.

[0045] Further, according to the method for manufacturing an electrophoretic display medium according to claim 13, in addition to the effect produced by the invention according to claim 9 or claim 10, the frame member arranging step includes In addition, since the frame member, which is a thermosetting resin, is arranged, the pair of substrates can be arranged more easily in the substrate arrangement process, and as a result, it is easier to perform the swimming. A moving display medium can be manufactured.

[0046] Further, according to the method for manufacturing an electrophoretic display medium according to claim 14, in addition to the effect produced by the invention according to claim 9 or claim 10, the frame member arranging step includes Since the frame member, which is a photocurable resin, is arranged, the pair of substrates can be arranged more easily in the substrate arrangement process, and as a result, the electrophoretic display medium can be more easily manufactured. it can.

[0047] According to the method for manufacturing an electrophoretic display medium according to claim 15, in addition to the effect of the invention according to claim 14, the frame member that is an ultraviolet curable resin is disposed in the frame member disposing step. Therefore, the pair of substrates can be easily arranged in the substrate arranging step, and as a result, the electrophoretic display medium can be more easily manufactured.

[0048] Further, according to the electrophoretic display medium of claim 16, since the charged particles do not move between the liquid chambers, the display image is not uneven, and the image can be displayed satisfactorily.

[0049] In addition, according to the electrophoretic display medium of claim 17, since the charged particles do not move between the liquid chambers, the display image is not uneven, and the image can be displayed satisfactorily.

[0050] Further, according to the electrophoretic display medium of claim 18, since the charged particles do not move between the liquid chambers, the display image is not uneven, and the image can be displayed better.

[0051] According to the electrophoretic display medium of claim 19, the force applied to the charged particles in the liquid chamber from the electric field generated by the voltage applied to the electrode during image display is substantially the same, that is, the electric In the entire electrophoretic display medium, the force applied by the charged particles in each of the liquid chambers is substantially uniform, so that the display image is not uneven.

[0052] Further, according to the electrophoretic display medium of claim 20, since the force applied to the charged particles in the liquid chamber during the image display is substantially the same, the display image is uneven. Does not occur.

[0053] In addition, according to the electrophoretic display medium of claim 21, the contact body can accurately maintain the distance between the substrates, so that an image can be displayed better.

[0054] According to the electrophoretic display medium of claim 22, in addition to the effect of the invention of claim 19, between the contact body and the other substrate or the partition member of the other substrate. in front Since the charged particles are difficult to be sandwiched, the uniformity of the predetermined distance in the entire electrophoretic display medium is increased, and the display image can be made more uniform, and as a result, the image can be displayed better.

[0055] In addition, according to the electrophoretic display medium of claim 23, it is easy to remove bubbles at the time of manufacture and the display liquid can be filled uniformly, so that the display image is more uniform. .

[0056] According to the electrophoretic display medium of claim 24, in addition to the effect of the invention of claim 21, the frame member is made of a thermoplastic resin, so that the pair of substrates can be arranged more easily. Can be manufactured easily.

[0057] Further, according to the electrophoretic display medium according to claim 25, in addition to the effect provided by the invention according to claim 21, the frame member is made of a thermosetting resin, so that the arrangement of the pair of substrates is further improved. It is easy to perform and can be easily manufactured.

[0058] Further, according to the electrophoretic display medium according to claim 26, in addition to the effect provided by the invention according to claim 21, the frame member is made of a photocurable resin, so that the arrangement of the pair of substrates is further improved. It is easy to perform and can be easily manufactured.

[0059] Further, according to the electrophoretic display medium according to claim 27, in addition to the effect exhibited by the invention according to claim 21, the frame member is made of an ultraviolet curable resin. It is easier to carry out and can be manufactured easily.

Brief Description of Drawings

FIG. 1 is a schematic view of an electrophoretic display medium 100 viewed from the display surface side.

FIG. 2 is a cross-sectional view of the electrophoretic display medium 100 taken along the line AA.

3 is a perspective view of a partition member 123. FIG.

FIG. 4 is a cross-sectional view of the second substrate 110 and the first substrate 120.

FIG. 5 is a cross-sectional view of the second substrate 110 placed on the frame member 130.

FIG. 6 is a schematic view showing filling of the display liquid 300.

FIG. 7 is a diagram showing the relationship between the average particle diameter of charged particles 305 and the gap L.

FIG. 8 is a cross-sectional view of the electrophoretic display medium 100 after moving the second substrate 110.

FIG. 9 is a cross-sectional view of an electrophoretic display medium 100 manufactured by the manufacturing method of Example 1. Ο

ο

10] A perspective view of the partition member 123 in which a cylindrical contact body 124 is formed.

Garden 1—

O 11] Perspective view of partition member 123 on which a plate-like contact body 124 is formed.

Yes

[12] A diagram showing the oscillation unit 900 provided in contact with the hot plate 600.

13] A cross-sectional view of the electrophoretic display medium 100 taken along the line C-C.

FIG. 14 is a schematic view showing a process of arranging the second substrate 110 and the first substrate 120 in the manufacturing method of Example 2.

FIG. 15 is a schematic view showing a process of removing excess display liquid 300 in the manufacturing method of Example 2. Explanation of symbols

Electrophoresis surface medium

110 Second board

111 Bipolar

112 Protective film

120 First board

121 one i pole

122 Protective film

123 compartment

124 Abutment body

130 Frame member

140 Fixed member

200 liquid chamber

250 gap

300 Display solution

305 charged particles

310 white particles

320 black particles

401 inlet

402 outlet

450 Sealant 501 injection device

502 Ejector

600 hot plate

700 Pressing jig

800 vacuum pump

810 Intake valve

820 Exhaust valve

850 vacuum vessel

900 Oscillator

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of the electrophoretic display medium 100 of the present invention as viewed from the display surface side. FIG. 2 shows a cross-sectional view of the electrophoretic display medium 100 as viewed from the direction of the arrow of AA. As shown in FIG. 2, in the electrophoretic display medium 100, white particles 310 and black particles 320 which are charged particles 305 filled later are added to the second electrode 111 and the first electrode 121, respectively. An image is formed by being moved between the second substrate 110 and the first substrate 120 by the electric field generated by the voltage. The numeral 8 is displayed on the display surface of the electrophoretic display medium 100 of FIG.

The electrophoretic display medium 100 is composed of a pair of substrates, that is, a transparent second substrate 110 made of PET (polyethylene terephthalate) resin constituting the display surface, and glass provided facing the second substrate 110. A first substrate 120 is included. If the second substrate 110 is a transparent material, it is possible to use an inorganic material such as glass, or a resin such as a polyimide resin, a polypropylene resin, or a polycarbonate resin. It is possible to use resin such as PET resin, polyimide resin, polypropylene resin, polycarbonate resin, and metals such as stainless steel and aluminum with an insulating layer on the surface. The second substrate 110 has a plurality of transparent second electrodes 111 made of ITO (indium tin oxide) and provided in parallel, and further has a protective film 112 for protecting the second electrode 111. . In FIG. 2, the plurality of second electrodes 111 are provided in parallel from the front to the back. [0064] The first substrate 120 has a plurality of first electrodes 121 provided in a twisted position and in parallel with the second electrode 111, and further a protective film for protecting the first electrode 121. 122. In FIG. 13, the plurality of first electrodes 121 are provided in parallel from the front to the back. The first substrate 120 has a partition member 123 on the protective film 122. The front end of the partition member 123 is not in contact with the second substrate 110, and the front surface (first opposing surface) of the partition member 123, which is the surface facing the second substrate 110, the second substrate 110 and the protective film 112. A gap 250 of 10 μm exists as a predetermined distance between the surface facing the partition member 123 (second facing surface). The partition member 123 has a width of 20 zm and a height of 20 zm.

A perspective view of the partition member 123 is shown in FIG. The partition members 123 are arranged in a grid at intervals of 100 xm in the vertical direction when viewed from the display surface side and in the left and right direction when viewed from the display surface side, and a plurality of liquid chambers 200 (the number of liquid chambers 200 ( It is provided so as to be divided into Fig. 2).

The liquid chamber 200 partitioned by the partition member 123, the second substrate 110 and the protective film 112, and the first substrate 120 and the protective film 122 is filled with the display liquid 300. The display liquid 300 includes white particles 310 made of styrene acrylic resin and titanium dioxide having an average particle size of 3 / m, and black particles 320 made of styrene acrylic resin and carbon black and having an average particle size of 3 μm. And a dispersion medium 330 made of an isoparaffin-based solvent in which the white particles 310 and the black particles 320 are dispersed. White particles 310 are positively charged and black particles 320 are negatively charged. Hereinafter, the white particles 310 and the black particles 320 are collectively referred to simply as charged particles 305.

[0067] Known dyes and pigments can be used as materials used for coloring the particles, and transparent particles or hollow particles whose surface is subjected to diffusion treatment may be used for the white particles. In addition, color particles prepared using phthalocyanine-based, azo-based, quinacridone-based pigments or dyes may be used.

[0068] Further, around the pair of substrates, a frame member 130 made of ethylene butyl acetate resin, which is a thermoplastic resin, is disposed in a state sandwiched between the pair of substrates. The frame member 130 keeps the distance between the second substrate 110 and the first substrate 120 at 30 zm, and prevents the display liquid 300 between the substrates from leaking outside. As a thermoplastic resin, Not only ethylene acetate butyl resin but also polypropylene resin and modified polyolefin resin can be used.

[0069] In order to more reliably fix the second substrate 110 and the first substrate 120 from the outer side of the frame member 130, the second substrate 110 and the first substrate 120 are fixed by the fixing member 140 made of an epoxy adhesive. And are fixed to each other.

In addition, the second substrate 110 is provided with a pair of inlets 401 and outlets 402 for filling the display liquid 300. The inlet 401 and the outlet 402 are respectively provided at the apexes on the diagonal line on the display surface. After the display liquid 300 is filled, the inlet 401 and the outlet 402 are sealed with a sealant 450 made of an epoxy adhesive. The fixing member 140 and the sealant 450 are not limited to the epoxy adhesive, and the thermoplastic resin, the photocurable resin, the low melting point glass, and the like can be used.

Next, the operation of the electrophoretic display medium 100 will be described. When an image is displayed on the electrophoretic display medium 100, the second electrode 111 and the first electrode 121 are crossed at the intersection of the second electrode 111 and the first electrode 121 so that a potential difference of 50 V is generated with respect to the pixel whose display is to be switched. By controlling the voltage applied to the electrode 111 and the first electrode 121, the charged particles 305 in the liquid chamber 200 move between the pair of substrates. Then, the color of the charged particles 305 moved to the second substrate 110 side is displayed on the display surface.

That is, in a certain pixel, when the potential difference of the first electrode 121 with respect to the second electrode 111 is +50 V, the positively charged white particles 310 in the liquid chamber 200 corresponding to the pixel become the second substrate 110. The negatively charged black particles 320 move to the first substrate 120 side. For this reason, white of the white particles 310 is displayed on the display surface.

In addition, in a certain pixel, when the potential difference of the first electrode 121 with respect to the second electrode 111 is −50 V, the negatively charged black particles 320 in the liquid chamber 200 corresponding to the pixel become the second substrate 110. The positively charged white particles 310 move to the first substrate 120 side. For this reason, black of the black particles 320 is displayed on the display surface.

As described above, by controlling the voltages applied to the second electrode 111 and the first electrode 121 according to the pixels, an arbitrary image is written on the electrophoretic display medium 100.

[0075] After the image is displayed, the voltage application to the second electrode 111 and the first electrode 121 is stopped. However, the state of the charged particle 305 that has moved between the substrates is caused by an electric attractive force called an image force generated between the charged particle 305 and the second substrate 110 or between the charged particle 305 and the first substrate 120. Maintained. For this reason, even if the electrophoretic display medium 100 is turned off, the image display is maintained on the display surface of the electrophoretic display medium 100.

As will be described later, the 10 × m gap 250 from the tip of the partition member 123 to the second substrate 110 is a gap through which the charged particles 305 having an average particle diameter of 3 am cannot pass freely.

[0077] Therefore, even when the electrophoretic display medium 100 is used with its display face up, the charged particles 305 hardly move between the liquid chambers 200. The concentration does not vary between the liquid chambers 200, and the image displayed on the display surface is not uneven.

[0078] As an evaluation of the electrophoretic display medium 100, first, as a process inspection, when the display liquid 300 was filled between the second substrate 110 and the first substrate 120, it was visually observed whether it could be filled uniformly. Evaluate and use G for uniform and NG for non-uniform. Next, after the electrophoretic display medium 100 is completed as a completion inspection, white display and black display are performed in a state where the electrophoretic display medium 100 is leaned, and a luminance meter BM7 manufactured by Topcon Tetano House is used for each display. The brightness of each pixel is measured, and when the difference between the average value and the maximum or minimum value is 20% or less of the average value in black display, it is evaluated that there is no unevenness. If it exceeds 20%, it is evaluated as NG, and if it is less than 10% of the average value in white display, it is evaluated as non-uniformity G. If it exceeds 10, it is uneven. Assess that it occurred and set it as NG. Furthermore, after leaving the electrophoretic display medium 100 in a leaning state for one week, the same evaluation as the completion inspection is performed again to evaluate the occurrence of unevenness.

Next, a method for manufacturing the electrophoretic display medium 100 will be described. 4, FIG. 5, FIG. 6, FIG. 8, FIG. 9, and FIG. 12 are cross-sectional views taken along the line BB in FIG.

Further, as described above, the first substrate 120 has the plurality of first electrodes 121 provided at the twisted positions so as to face the plurality of second electrodes 111, and further protects the first electrode 121. A protective film 122 is provided. The first substrate 120 has a partition member 123 on the protective film 122. In addition, a frame member 130 having a height of about 60 μm formed of a thermoplastic resin such as a hot melt adhesive was disposed on the outer periphery of the first substrate 120.

Next, as shown in FIG. 5, the second substrate 110 was placed on the frame member 130. At this time, since the height of the frame member 130 is 50 zm and the height force of the partition member 123 is ¾0 xm, the gap 250 between the front surface of the partition member 123 and the second substrate 110 is about 30 μm. .

Further, the lower part of the first substrate 120 is in contact with the hot plate 600. The hot plate 600 is used at a later stage to store heat in the frame member 130 formed of a thermoplastic resin.

Next, after preparing a display liquid 300 in which white particles 310 and black particles 320 both having an average particle diameter of 3 am are dispersed, the display liquid 300 is introduced into the inlet 401 of the second substrate 110 as shown in FIG. The injection device 501 for sending out the display liquid 300 from the inside is arranged, and the discharge device 502 for sucking out and discharging excess air and the display liquid 300 is arranged at the discharge port 402. Then, the display liquid 300 was filled between the second substrate 110 and the first substrate 120 using the injection device 501 and the discharge device 502. The cylindrical ends of the injection device 501 and the discharge device 502 are formed with rubber caps, and the display liquid is discharged from the contact portion between the injection port 401 and the injection device 501 and the contact portion between the discharge port 402 and the discharge device 501 during the filling operation. There is no leakage. The distance between the tip surface of the partition member 123 and the second substrate 110 is 30 μΐη, and the distance is sufficiently larger than the charged particles 305 in the display liquid 300. Since the liquid can pass through, it is possible to uniformly fill the display liquid 300 between the second substrate 110 and the first substrate 120.

[0085] After the filling of the display liquid 300 between the substrates was completed, the above-described hot plate 600 was heated to 80 ° C. At this time, since the softening point of the frame member 130 is 80 ° C, the softening force The melting point of the second substrate 110 is 260 ° C, and the melting point of the first substrate 120 is 600 ° C or higher. .

As shown in FIG. 8, with the frame member 130 softened in this manner, the pressing jig 700 is lowered and the second substrate 110 is pressed from above with the pressing jig, whereby the first The two substrates 1 10 were moved so as to approach the first substrate 120. The shape of the pressing jig 700 should be such that the distance from the tip of the partition member 123 to the second substrate 110, that is, the gap 250 is 10 xm. That is, since the distance between the substrates is designed to be 30 μm, the second substrate 110 and the first substrate 120 can be arranged only by pressing operation. At this time, surplus display liquid 30

0 was collected using the discharge device 502.

Next, the second substrate 110 and the first substrate 120 were fixed by cooling the hot plate 600 to 40 ° C. and curing the frame member 130.

Then, after removing the pressing jig 700, as shown in FIG. 9, the second substrate 110 and the first substrate are further fixed by fixing from the side surface of the electrophoretic display medium 100 with a fixing member 140. 12

0 was fixed more securely.

Next, the injection device 501 (see FIG. 8) and the discharge device 502 (see FIG. 8) were removed. Inlet 40

After the display liquid 300 adhering to the periphery of 1 and the discharge port 402 was wiped off using an absorbent member 420 (not shown), the sealing liquid 50 was attached to the injection port 401 and the discharge port 402 and sealed. In this manner, the electrophoretic display medium 100 in which the charged particles 305 were uniformly filled in each liquid chamber 200 was manufactured.

[0090] When the thus produced electrophoretic display medium 100 was leaned against and evaluated for display, no unevenness occurred. After this, the display was evaluated again after standing for 1 week. As a result, the display was uneven.

Next, Example 2 of the present invention will be described. As shown in FIG. 14, the manufacturing apparatus was installed in a vacuum container 850. A vacuum pump 800 was connected to the vacuum vessel 850 via an intake valve 810 and an exhaust valve 820.

Further, the second substrate 110 provided with only the injection port 401 was used. At this time, since the height of the frame member 130 is 50 μΐη and the height of the partition member 123 is 20 μΐη, the gap 250 between the tip surface of the partition member 123 and the second substrate 110 is 30 zm. It becomes.

[0093] After filling display liquid 300 in which white particles 310 and black particles 320, both having an average particle size of 3 zm, are dispersed in injection device 501, intake valve 810 is closed, exhaust valve 820 is opened, and a vacuum pump Activated 800.

After confirming that the inside of the vacuum vessel 850 was evacuated, the injection apparatus 501 was operated to fill the display liquid 300 between the second substrate 110 and the first substrate 120. At this time, the distance between the tip surface of the partition member 123 and the second substrate 110 is 30 xm, and the distance is within the display liquid 300. Charged particles 305 that are sufficiently larger than charged particles 305 can freely pass through the interval, so that the display liquid 300 is uniformly filled between the second substrate 110 and the first substrate 120. I was able to force S. After filling the display liquid 300 between the substrates, the injection device 501 was moved.

[0095] As shown in FIG. With the heat applied to C and only the frame member 130 softened, the pressing jig 700 is lowered, and the second substrate 110 is pressed onto the first substrate 120 by pressing the second substrate 110 from above with the pressing jig. I moved it closer. The shape of the pressing jig 700 is designed so that the distance from the tip of the partition member 123 to the second substrate 110, that is, the gap 250 is 15 xm. A substrate 120 can be placed. At this time, the surplus display liquid 300 was removed by moving the blade 410 from the left portion of the inlet 401 to the suction member 420 installed on the right portion while keeping the blade 410 in close contact with the second substrate 110.

Next, the hot plate 600 was cooled to 40 ° C., and the frame member 130 was cured, so that the second substrate 110 and the first substrate 120 were fixed.

[0097] Then, after closing the exhaust valve 820 and stopping the vacuum pump 800, the suction bubble 810 was opened, the inside of the vacuum vessel 850 was returned to normal pressure, and the pressing jig 700 was removed. Thereafter, similarly to Example 1, the side surface of the electrophoretic display medium 100 is fixed with the fixing and fixing member 140, and the injection port 401 is sealed with the sealant 450, so that the liquid chambers 200 are uniformly charged. An electrophoretic display medium 100 filled with particles 305 was produced.

[0098] When the thus produced electrophoretic display medium 100 was stood and evaluated for display, unevenness did not occur. After this, the display was evaluated again after standing for 1 week. As a result, the display was uneven.

[0099] Next, Example 3 of the present invention will be described. The height of the frame member 130 when the second substrate 110 is placed on the frame member 130 is 40 am, the height of the partition member 123 is 20 zm, that is, the front surface of the partition member 123, Except that the gap 250 between the second substrate 110 and the second substrate 110 was set to 20 μm, the electrophoretic display medium 100 was manufactured in the same manner as in Example 1. As a result, the display liquid 300 was uniformly distributed between the second substrate 110 and the first substrate 120. It was possible to fill in between. Furthermore, when the electrophoretic display medium 100 produced in this manner was stood and evaluated for display, no unevenness occurred. After this, the display was evaluated again after standing for one week. B) There was no unevenness in the display.

[0100] Next, Example 4 of the present invention will be described. When the second substrate 110 is placed on the frame member 130, the height of the frame member 130 is 30 μm, and the height of the partition member 123 is 20 zm, that is, the front surface of the partition member 123 The gap 250 between the second substrate 110 is 10 zm, the average particle diameter of the charged particles 305 dispersed in the display liquid 300 is 0.7 μm, and the gap 250 in the substrate placement step is 3 μm. The electrophoretic display medium 100 was produced in the same manner as in Example 1 except that the pressing jig 700 designed as described above was used. The display liquid 300 was uniformly distributed between the second substrate 110 and the first substrate 120. Could be filled. Furthermore, when the electrophoretic display medium 100 produced in this way was stood and evaluated for display, no unevenness occurred. After this, the display was evaluated again after standing for 1 week. As a result, no unevenness occurred in the display.

[0101] Next, Example 5 of the present invention will be described. When the second substrate 110 is placed on the frame member 130, the height of the frame member 130 is 65 μm, the height of the partition member 1 23 is 20 / im, that is, the front surface of the partition member 123 The gap 250 between the second substrate 110 is 45 μm, the average particle diameter of the charged particles 305 dispersed in the display liquid 300 is 8 μm, and the gap 250 in the substrate placement step is 40 μm. The electrophoretic display medium 100 was produced in the same manner as in Example 1 except that the pressing jig 700 designed as described above was used, and the display liquid 300 was uniformly filled between the second substrate 110 and the first substrate 120. We were able to. Further, when the electrophoretic display medium 100 produced in this way was stood and evaluated for display, no unevenness occurred. After this, the display was evaluated again after being allowed to stand for 1 week.

[0102] In addition, in the electrophoretic display medium 100 according to the present invention, experiments related to Comparative Examples 1 to 5 were performed in order to find the optimum value of the gap 250.

First, Comparative Example 1 of the present invention will be described. When the second substrate 110 is placed on the frame member 130, the height of the frame member 130 is 35 zm, the height of the partition member 12 3 is 20 zm, that is, the front surface of the partition member 123, The electrophoretic display medium 100 was produced in the same manner as in Example 1 except that the gap 250 between the second substrate 110 was 15 μm, and the display liquid 300 was uniformly distributed between the second substrate 110 and the first substrate 120. Can not be filled in between won.

[0104] Next, Comparative Example 2 of the present invention will be described. When the second substrate 110 is placed on the frame member 130, the height of the frame member 130 is 45 μm, and the height of the partition member 123 is 20 zm, that is, the tip surface of the partition member 123 The same as in Example 1 except that the pressing jig 700 designed so that the gap 250 with the second substrate 110 is 25 μm and the gap 250 in the substrate placement step is 20 μm is used. When the electrophoretic display medium 100 was produced, the display liquid 300 could be uniformly filled between the second substrate 110 and the first substrate 120. Further, when the electrophoretic display medium 100 produced in this manner was stood and evaluated for display, no unevenness occurred. After this, the display was evaluated again after standing for 1 week, and unevenness in the display occurred.

[0105] Next, Comparative Example 3 of the present invention will be described. When the second substrate 110 is placed on the frame member 130, the height of the frame member 130 is 23 am, the height of the partition member 1 23 is 20 / im, that is, the front surface of the partition member 123 Electrophoretic display as in Example 1 except that the gap 250 between the second substrate 110 is 3 / im and the average particle diameter of the charged particles 305 dispersed in the display liquid 300 is 0.7 / im. When the medium 100 was manufactured, the display liquid 300 could not be uniformly filled between the second substrate 110 and the first substrate 120.

[0106] Next, Comparative Example 4 of the present invention will be described. When the second substrate 110 is placed on the frame member 130, the height of the frame member 130 is 30 μm, and the height of the partition member 123 is 20 / im, that is, the front surface of the partition member 123 The gap 250 between the second substrate 110 and the second substrate 110 is 10 / im, the average particle diameter of the charged particles 305 dispersed in the display liquid 300 is 0.7 / im, and the gap 250 in the substrate placement step is 5 _β m. The electrophoretic display medium 100 was produced in the same manner as in Example 1 except that the pressing jig 700 designed so as to be the same as in Example 1 was obtained. The display liquid 300 was uniformly distributed between the second substrate 110 and the first substrate 120. Can be filled in between. Furthermore, when the electrophoretic display medium 100 produced in this way was stood and evaluated for display, no unevenness occurred. After this, the display was evaluated again after standing for one week, and the display was uneven.

[0107] Next, Comparative Example 5 of the present invention will be described. The height of the frame member 130 when the second substrate 110 is placed on the frame member 130 is 70 am, and the partition member 1 The height of 23 is 20 / im, that is, the gap 250 between the tip surface of the partition member 123 and the second substrate 110 is 50 μm, and the average particle diameter of the charged particles 305 dispersed in the display liquid 300 is 8 The electrophoretic display medium 100 was produced in the same manner as in Example 1 except that the pressing jig 700 designed so that the gap 250 in the substrate placement process was 45 _β m was set to μm. The liquid 300 could be filled between the second substrate 110 and the first substrate 120. Further, when the electrophoretic display medium 100 produced in this way was stood and evaluated for display, no unevenness occurred. After this, the display was evaluated again after standing for 1 week, and the display was uneven.

FIG. 7 shows a table of the results of Examples 1 to 5 and Comparative Examples 1 to 5 described above. If the gap 250 is 5 times or less of the average particle diameter of the charged particles 305, it is difficult to uniformly fill the display liquid, and unevenness can be suppressed. It can be seen that when the average particle size of 305 is 5 times or less, the charged particles 305 have an effect of suppressing movement between the compartments.

Further, when the second substrate 110 and the first substrate 120 are disposed, even if the charged particles 305 are on the partition member 123, the distance between the substrates is longer than a predetermined distance. In order to prevent this, it is desirable that the gap 250 in the substrate placement step be at least 1 times the average particle size. This is because if the distance of the gap 250 is partially different, the intensity of the electric field applied to the charged particle 305 is partially different, resulting in unevenness.

In the electrophoretic display medium 100 according to the embodiment of the present invention, the distance of the gap 250 is added to the charged particles 305 in the liquid chamber 200 even if the charged particles 305 exist between the gaps 250. When the applied forces are substantially the same distance, the force applied to the charged particles 305 in each of the liquid chambers 200 in the entire electrophoretic display medium is substantially uniform, and the display quality is improved. Therefore, the distance of the gap 250 may be less than 1 times the average particle diameter.

In the above description, for the sake of simplicity, the electrophoretic display medium 100 has been described as a very small display medium consisting of 54 pixels of 9 rows × 6 columns, but the electrophoretic display medium according to the present invention. Is not limited to this number.

[0112] In the above embodiment, there is no portion in contact with the second substrate 110 at the tip of the partition member 123. As described above, the first substrate 120 provided with the contact member 124 that partially contacts the second substrate 110 at the tip of the partition member 123 may be used. Figures 10 and 11 are contact bodies

The perspective view of an example of the division member 123 provided with 124 is shown.

[0113] As shown in FIG. 10, a plurality of cylindrical columns may be provided on the partition member 123 at predetermined intervals as the contact body 124, or a thin plate-shaped column force as shown in FIG. It may be provided on the partition member 123 at intervals.

[0114] When the partition member 123 and the contact body 124 are viewed from the display surface side, these contact bodies 124 are charged because the tip of the contact body 124 is smaller than the tip of the partition member 123. The particles 305 are placed on the tip of the contact body 124.

[0115] When viewed from the vertical direction of the display surface, the abutting body 124 is not shown in FIGS. 10 and 11 if the size of the tip of the abutting body 124 is smaller than the size of the tip of the partition member 123. It may be shaped.

In addition, as shown in FIG. 12, an oscillation unit 900 that vibrates the hot plate 600 is provided in contact with the hot plate 600, and oscillation occurs when the second substrate 110 is brought closer to the first substrate 120 in the above-described embodiment. By driving the part, the second substrate 110 or the first substrate 120 may be brought close to each other while being vibrated. If arranged while applying vibration, the charged particles 305 that have been placed on the tip of the partition member 123 or the contact member 124 when the display liquid 300 is filled, and the tip force of these particles easily fall.

In addition, the contact body 124 may contact the second substrate 110 or the first substrate 120 through the charged particles 305 in one step.

In the above-described embodiment, the first substrate 120 has been described as having the partition member 123. However, the second substrate 110 may have the partition member 123. Both the first board 120 and the first board 120 each have a first partition member and a second partition member. Here, the first substrate 120 having the partition member 123 means that the first substrate 120 is formed by integrally forming the partition member 123, and the first substrate 120 simply places the partition member 123 thereon. You can just do it.

[0119] In addition, there is an electrophoretic display medium using non-spherical particles such as a force particle having a spherical shape such as a charged particle 305 described as being spherical in the above-described embodiment. In this case, an optimal gap 250 may be appropriately set according to the shape and flexibility of the particles.

[0120] In the above-described embodiment, the second substrate 110 and the first substrate 120 are fixed with the epoxy adhesive 140. However, other means such as a bolt, a formwork, and a clip may be used as the fixing method. .

[0121] In the first embodiment described above, the frame member 130 has been described as being a thermoplastic resin. However, the pressing member 700 can be operated in two stages by using the frame member 130 as an elastic body such as rubber. In the first stage, after the pressing jig 700 is operated to press the second substrate 110 toward the first substrate 120, the display liquid 300 is filled between the second substrate 110 and the first substrate 120. Then, after the pressing jig 700 is operated in the second stage to set the gap 250 to a predetermined interval, the fixing member 140 may be arranged and fixed around the frame member.

[0122] Further, in the above-described embodiment, the force is described when the frame member 130 is made of a thermoplastic resin. When the substrate is placed with the frame member 130 made of a high-viscosity or semi-cured thermosetting resin. After the second substrate 110 is pressed against the first substrate 120 side by the jig 700, the second substrate 110 and the first substrate 120 may be fixed by heating the frame member 130 of the thermosetting resin. .

[0123] In the above-described embodiment, the frame member 130 is described as being a thermoplastic resin. When the frame member 130 is made of a photocurable resin and the substrate is placed, the pressing jig 700 is used to place the second substrate. After pressing 110 to the first substrate 120 side, the second substrate 110 and the first substrate 120 may be fixed by irradiating light to the photocurable resin frame member 130.

[0124] Further, among the above-mentioned photo-curable resins, it is more preferable to use an ultraviolet curable resin since the curing time is short.

[0125] When the distance of the gap 250 is smaller than the particle diameter of the charged particles 305, at least the partition member 123 so that the electric field applied to the charged particles 305 by the voltage applied to the electrodes is substantially uniform. Alternatively, the material of the protective film 112 may be a plastic body or an elastic body.

In the above embodiment, the protective film 112 and the protective film 122 are described as being formed. However, the protective film 112 and the consistent film 122 may not be formed.

Claims

The scope of the claims

[1] a pair of substrates composed of a first substrate (120) and a second substrate (110);

A partition member (123) is provided at least on the first substrate (120), and charged particles (305) and the charge are charged in a liquid chamber (200) partitioned by the pair of substrates and the partition member (123). In the method for producing an electrophoretic display medium (100) filled with a display liquid (300) comprising a dispersion medium (330) for dispersing particles (305),

A first facing surface of the partition member (123) provided on the first substrate (120) facing the partition member provided on the second substrate (110) or the second substrate (110); In a state where the gap (250) between the second substrate (110) or the second facing surface facing the first facing surface of the partition member provided on the second substrate (110) is separated from a predetermined distance. A display liquid disposing step of disposing at least the display liquid (300) on the first substrate (120); and after the display liquid disposing step, between the first opposing surface and the second opposing surface. A substrate disposing step of disposing the pair of substrates so that the charged particles (305) cannot pass through the gap (250) at a predetermined distance.

A method of manufacturing an electrophoretic display medium (100) comprising a fixing step for fixing the pair of substrates arranged in the substrate arranging step to each other.

[2] The charged particle (305) is substantially spherical,

The pair of substrates are arranged so that a predetermined distance of the gap (250) is 5 times or less of an average particle diameter of the charged particles (305) in the substrate arranging step. The method for producing an electrophoretic display medium (100) according to claim 1.

[3] An electrode (111, 121) is provided on at least one of the first facing surface and the second precursor facing surface,

Even if the charged particles (305) exist between the first facing surface and the second facing surface at a predetermined distance of the gap (250) in the substrate arranging step, the electrodes (111, 121) The pair of substrates are arranged so that the force applied to the charged particles (305) in the liquid chamber (200) from the electric field generated by the applied voltage is substantially the same. The method for producing an electrophoretic display medium (100) according to claim 1.

[4] The charged particles (305) are substantially spherical, The pair of substrates are arranged so that a predetermined distance of the gap (250) is at least one time larger than an average particle diameter of the charged particles (305) in the substrate arranging step. The method for producing an electrophoretic display medium (100) according to claim 3.

[5] The electrophoretic display medium according to [1], wherein in the display liquid disposing step, the display liquid (300) is filled between the pair of substrates in a state where the pair of substrates are opposed to each other. 100) production method.

[6] At least the partition member (123) or the first substrate (120) provided on the first substrate (120) is provided with a contact body (124),

2. The electrophoresis according to claim 1, wherein, in the substrate placement step, the contact body (124) is in contact with a second substrate (110) or a partition member provided on the second substrate (110). Manufacturing method of display medium (100).

[7] The partition member (123) protrudes from the first substrate (120) or the second substrate (110), and has an end surface in which the first opposing surface or the second opposing surface is defined, The contact body (124) is provided on the end surface of the partition member (123) and has an end surface protruding from the end surface of the partition member (123). The end surface of the contact body (124) is the end surface of the partition member (123). The method for producing an electrophoretic display medium (100) according to claim 6, wherein the electrophoretic display medium (100) is smaller than an end surface of the electrophoretic display medium.

8. The method for manufacturing an electrophoretic display medium (100) according to claim 1, wherein in the substrate arranging step, the pair of substrates are arranged while applying vibration.

[9] A frame member arranging step of arranging a frame member (130) made of a thermoplastic resin or a stimulus curable resin so as to surround at least the first substrate (120) so as to surround a display area for displaying an image. Have

An inlet (401) for filling the display liquid (300) is formed in at least one of the pair of substrates or the frame member (130),

In the display liquid disposing step, the display liquid (401) is inserted from the inlet (401) in a state where the distance between the first facing surface and the second facing surface is separated from a predetermined distance of the gap (250). 300) and filling between the pair of substrates,

In the substrate placement step, at least the second substrate (110) is replaced with the first substrate (12 0), the height of the frame member (130) is reduced, and the pair of substrates are arranged,

The method for manufacturing an electrophoretic display medium (100) according to claim 1, further comprising a sealing step of sealing the injection port (401) after the fixing step.

A frame member disposing step of disposing at least a frame member (130) made of a thermoplastic resin or a stimulus curable resin so as to surround a periphery of a display region for displaying an image on the first substrate (120); ,

At least one of the pair of substrates or the frame member (130) is formed with an inlet (401) and an outlet (402) for filling the display liquid (300). The display liquid (300) is injected from the injection port (401) in a state where the distance between the first opposing surface and the second opposing surface is separated from the predetermined distance of the gap (250). Excess display liquid (300) is discharged from the discharge port (402) while filling between the pair of substrates,

In the substrate placement step, at least the second substrate (110) is moved so as to approach the first substrate (120), the height of the frame member (130) is reduced, and the pair of substrates is placed,

The method for manufacturing an electrophoretic display medium (100) according to claim 1, further comprising a sealing step of sealing the inlet (401) and the outlet (402) after the fixing step. The method for manufacturing an electrophoretic display medium (100) according to claim 9 or 10, wherein the frame member (130) is in an elastic state in the substrate disposing step.

The frame member (130) is a thermoplastic resin,

In the substrate placement step, the frame member (130) is heated and softened, and at least one of the substrates is moved closer to the other substrate to place the pair of substrates,

The manufacturing method of the electrophoretic display medium (100) according to claim 9 or 10, wherein, in the fixing step, the frame member (130) is cooled to fix a distance between the pair of substrates. Method. [13] The frame member (130) is a thermosetting resin that cures when stimulated by heating. In the fixing step, the frame member (130) is heated and cured to reduce a distance between the pair of substrates. The method for producing an electrophoretic display medium (100) according to claim 9 or 10, wherein the electrophoretic display medium (100) is fixed.

[14] The frame member (130) is a photocurable resin that is cured by stimulation with light,

The distance between the pair of substrates is fixed by curing the frame member (130) by light irradiation in the fixing step.

A method for producing the electrophoretic display medium (100) according to 0.

15. The method for producing an electrophoretic display medium (100) according to claim 14, wherein the photocurable resin is an ultraviolet curable resin that is cured by irradiation with ultraviolet rays.

[16] a pair of substrates composed of a first substrate (120) and a second substrate (110);

Charged particles (305) and charged particles (305) are dispersed in at least a partition member (123) provided on the first substrate (120) and a liquid chamber (200) partitioned by the pair of substrates. An electrophoretic display medium (100) filled with a display liquid (300) comprising a dispersion medium (330)

A first facing surface of the partition member (123) provided on the first substrate (120) facing the second substrate (110) or the partition member provided on the second substrate (110); In a state where the gap (250) between the second opposing surface facing the first opposing surface of the partition member provided on the second substrate (110) or the second substrate (110) is separated from a predetermined distance, At least a display liquid disposing step of disposing a display liquid (300) on the first substrate (120), and after the display liquid disposing step, a distance between the first facing surface and the second facing surface is A substrate disposing step of disposing the pair of substrates so that a predetermined distance of the gap (250) through which the charged particles (305) cannot freely pass is set;

An electrophoretic display medium (100) comprising a fixing step for fixing the pair of substrates arranged in the substrate arranging step to each other.

[17] a pair of substrates composed of a first substrate (120) and a second substrate (110);

A partition member (123) provided on the first substrate (120), or a partition member provided on the partition member (123) and the second substrate (110), the pair of substrates and the The liquid chamber (200) partitioned by the partition member (123) was filled with a display liquid (300) composed of charged particles (305) and a dispersion medium (330) for dispersing the charged particles (305). In the electrophoresis display medium (100),

A first facing surface provided on a partition member (123) provided on the first substrate (120) and facing the partition member provided on the second substrate (110) or the second substrate (110); The charged particle (305) has a distance from a second opposing surface provided on the second substrate (110) or a partition member provided on the second substrate (110) and facing the first opposing surface. An electrophoretic display medium (100) in which the pair of substrates are arranged so as to be a predetermined distance of a gap (250) that cannot freely pass.

[18] The charged particle (305) is substantially spherical,

The electrophoretic display medium (100) according to claim 17, wherein the predetermined distance of the gap (250) is not more than 5 times the average particle diameter of the charged particles (305).

[19] An electrode (111, 121) is provided on at least one of the first facing surface and the precursor second facing surface,

The predetermined distance of the gap (250) is an electric field generated by a voltage applied to the electrodes (111, 121) even if the charged particles (305) exist between the first facing surface and the second facing surface. The electrophoretic display medium (100) according to claim 17, wherein the distance applied to the charged particles (305) in the liquid chamber (200) is substantially the same.

[20] The charged particle (305) is substantially spherical,

The electrophoretic display medium according to claim 19, wherein the predetermined distance of the gap (250) is one or more times the average particle diameter of the charged particles (305).

[21] The partition member (123) provided on the first substrate (120) is provided at least at a part of the tip protruding from the first substrate (120), and the second substrate (110) or The electrophoretic display medium (100) according to claim 17, further comprising an abutment body (124) in contact with a partition member provided on the second substrate (110).

[22] The partition member (123) provided on the first substrate (120) has an end surface protruding from the first substrate (120) and defining the first facing surface, and the contact body ( 124) is provided on the end surface of the partition member (123) and projects from the end surface of the partition member (123) The electrophoretic display medium (100) according to claim 21, wherein an end surface of the contact body (124) is smaller than an end surface of the partition member (123).

[23] A frame member (130) made of a thermoplastic resin or a stimulus-curable resin that is provided in close contact with the pair of substrates and surrounds a display area for displaying an image. The electrophoretic display medium (100) according to claim 17, further comprising:

) o

24. The electrophoretic display medium (100) according to claim 23, wherein the frame member (130) is a thermoplastic resin.

25. The electrophoretic display medium (100) according to claim 23, wherein the frame member (130) is a thermosetting resin that is cured by a stimulus by heating.

26. The electrophoretic display medium (100) according to claim 23, wherein the frame member (130) is a photocurable resin that is cured by light stimulation.

27. The electrophoretic display medium (100) according to claim 26, wherein the photocurable resin is an ultraviolet curable resin that is cured by irradiation with ultraviolet rays.