JP2004310087A - Electrophoresis display device - Google Patents

Electrophoresis display device Download PDF

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JP2004310087A
JP2004310087A JP2004095650A JP2004095650A JP2004310087A JP 2004310087 A JP2004310087 A JP 2004310087A JP 2004095650 A JP2004095650 A JP 2004095650A JP 2004095650 A JP2004095650 A JP 2004095650A JP 2004310087 A JP2004310087 A JP 2004310087A
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electrode
substrate
display device
electrophoretic display
partition
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Nobutaka Ukigaya
信貴 浮ヶ谷
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Canon Inc
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Canon Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrophoresis device in which the manufacturing process can be simplified. <P>SOLUTION: Each pixel A of the electrophoresis device is partitioned by a partition wall member 2; and an insulating liquid 3, a charged particle 4, a first electrode 5a, or a second electrode 5b is disposed at the pixel A. Among them, the first electrode 5a is formed of a conductive adhesive, and is disposed between the partition wall member 2 and a substrate 1a so that they are glued. Accordingly, the manufacturing process can be simplified, when compared with the case in which another adhesive layer, other than the first electrode 5a, is separately provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、一般的には、帯電粒子を移動させることに基づき表示を行う電気泳動表示装置に関する。   The present invention generally relates to an electrophoretic display device that performs display based on moving charged particles.

従来、電圧を印加して帯電粒子を移動させることに基づき表示を行うようにした電気泳動表示装置が注目されている。   2. Description of the Related Art Conventionally, an electrophoretic display device that performs display based on moving a charged particle by applying a voltage has attracted attention.

この種の電気泳動表示装置は、特許文献1に開示されているように、所定間隙を開けた状態に配置された一対の基板と、それらの基板の間隙に配置された絶縁性液体や帯電粒子と、電圧が印加される一対の電極と、によって構成されていた。   As disclosed in Patent Document 1, this type of electrophoretic display device includes a pair of substrates arranged with a predetermined gap therebetween, and an insulating liquid or charged particles arranged in the gap between the substrates. And a pair of electrodes to which a voltage is applied.

ところで、このような電気泳動表示装置においては、帯電粒子が他の画素へ移動してしまわないように隔壁、あるいはマイクロカプセルを配置して画素が区画されている。   By the way, in such an electrophoretic display device, pixels are partitioned by arranging partitions or microcapsules so that charged particles do not move to other pixels.

そのため、前記特許文献1に記載の隔壁を有する電気泳動表示装置の製造に際しては、
・ 一対の基板に電極をそれぞれ形成し、
・ 一方の基板に隔壁を形成し、
・ 隔壁にて形成された凹部(各画素に相当)に絶縁性液体や帯電粒子を充填し、
・ 隔壁の上面に接着層を設け、
・ 隔壁に他方の基板(電極を形成してある基板)を貼り付ける、
という作業が行われていた。
Therefore, when manufacturing the electrophoretic display device having the partition walls described in Patent Document 1,
-Forming electrodes on a pair of substrates,
・ Form a partition on one substrate,
-Filling the recess formed in the partition (corresponding to each pixel) with an insulating liquid or charged particles,
・ Provide an adhesive layer on the upper surface of the partition,
・ The other substrate (substrate on which electrodes are formed) is attached to the partition wall.
That work was being done.

また、特許文献2に記載のマイクロカプセルを有する電気泳動表示装置のように、
・ 帯電粒子及び絶縁性液体を備えたマイクロカプセルを含有するシートを形成し、
・ 電極を備えた基板を形成し、
・ 該シートと基板とを接着層によって接着するようにしたものもある。
Further, as in an electrophoretic display device having a microcapsule described in Patent Document 2,
Forming a sheet containing microcapsules with charged particles and an insulating liquid,
Forming a substrate with electrodes,
There is also a sheet in which the sheet and the substrate are bonded by an adhesive layer.

特開昭59−34518号公報JP-A-59-34518 特開2002−023202公報JP 2002-023202 A

ところで、上述した電気泳動表示装置の場合、画素を区画する部材とそれを支持する基板を接着するための接着層を設けなければならず、その分、製造工程が煩雑になり(つまり、接着層を形成するための製造装置や製造工程が必要になり)、製造工程が煩雑な分だけ歩留まりも上がったり製造コストが上昇したりするおそれがあった。   By the way, in the case of the above-described electrophoretic display device, it is necessary to provide an adhesive layer for adhering a member that partitions the pixels and a substrate that supports the pixel, and the manufacturing process is accordingly complicated (ie, the adhesive layer This requires a manufacturing apparatus and a manufacturing process for forming the semiconductor device, and there is a possibility that the manufacturing process is complicated, so that the yield is increased or the manufacturing cost is increased.

そこで、本発明は、製造工程の簡素化や歩留りの低減等を達成する電気泳動表示装置を提供することを目的とするものである。   Therefore, an object of the present invention is to provide an electrophoretic display device that achieves simplification of a manufacturing process, reduction of a yield, and the like.

本発明は上記事情を考慮してなされたものであり、間隙を開けて対向して配置された第1基板及び第2基板と、該間隙に配置され、該間隙を複数の区画に仕切る隔壁と,該区画に配置された絶縁性液体及び複数の帯電粒子と、少なくとも隔壁と第1基板との間に配置された第1電極と、第2基板上の第2電極と,を備えた電気泳動表示装置において、該第1電極が接着性を有することを特徴とする。   The present invention has been made in consideration of the above circumstances, and has a first substrate and a second substrate arranged to face each other with a gap therebetween, and a partition arranged in the gap and dividing the gap into a plurality of sections. Electrophoresis comprising: an insulating liquid and a plurality of charged particles disposed in the compartment; a first electrode disposed at least between the partition and the first substrate; and a second electrode on the second substrate. In the display device, the first electrode has adhesiveness.

本発明によると、接着機能を有する電極を用いることで、従来必要であった接着層塗布用の製造工程や製造装置が不要となり、製造工程を簡略化できる。その結果、製造歩留りや製造コストを低減することができる。   According to the present invention, by using an electrode having an adhesive function, a manufacturing process and a manufacturing apparatus for applying an adhesive layer, which are conventionally required, become unnecessary, and the manufacturing process can be simplified. As a result, manufacturing yield and manufacturing cost can be reduced.

以下、図1及び図2を参照して、本発明の実施の形態について説明する。   Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

本実施の形態に係る電気泳動表示装置は、図1に符号Dで示すように、所定間隙を開けて配置された第1基板1a及び第2基板1bと、これら基板の間に配置された絶縁性液体3及び複数の帯電粒子4と、第1電極5a及び第2電極5bと、を備え、該第1電極5a及び第2電極5bの少なくとも一方が接着機能を有する電極であることを特徴とする。 The electrophoretic display device according to this embodiment, as indicated at D 1 in FIG. 1, a first substrate 1a and the second substrate 1b disposed with a predetermined gap, disposed between the substrate It comprises an insulating liquid 3 and a plurality of charged particles 4, a first electrode 5a and a second electrode 5b, and at least one of the first electrode 5a and the second electrode 5b is an electrode having an adhesive function. And

これらの基板の間隙には画素Aを仕切るように隔壁部材2を配置すると良い。そして、絶縁性液体3及び複数の帯電粒子4や、第1電極5a及び第2電極5bは各画素Aに配置すると良い。この電気泳動表示装置は、これらの電極5a,5bに電圧を印加して帯電粒子4を移動させることに基づき表示を行うようになっている。なお、便宜上、図1には1つの画素のみを示す。   It is preferable to arrange the partition member 2 in the gap between these substrates so as to partition the pixels A. Then, the insulating liquid 3 and the plurality of charged particles 4, and the first electrode 5a and the second electrode 5b are preferably arranged in each pixel A. This electrophoretic display device performs display based on moving the charged particles 4 by applying a voltage to these electrodes 5a and 5b. FIG. 1 shows only one pixel for convenience.

また、本発明における第1電極5aは、前記隔壁部材2と前記第1基板1aとの間に配置されてそれらを接着するように構成されている。図1に示す第1電極5aは画素Aの境界部分にのみ配置されていて画素Aの内部には配置されていないが、画素Aの境界部分及び内部に配置するようにしても良い。   Further, the first electrode 5a in the present invention is arranged between the partition member 2 and the first substrate 1a so as to adhere them. Although the first electrode 5a shown in FIG. 1 is arranged only at the boundary portion of the pixel A and is not arranged inside the pixel A, it may be arranged at the boundary portion and inside the pixel A.

また、図3に示すような画素を区画する構造としてマイクロカプセルを用いた電気泳動表示装置のような場合には、多数のマイクロカプセルに沿うように第1電極をシート状に配置し、その第1電極によって第1基板を接着すると良い。なお、図1に符号5aで示すように第1電極を画素Aの境界部分にのみ配置するような場合、或いは第1電極を第1基板のほぼ全面に配置するような場合、各画素Aの第1電極は電気的に導通させて同電位に保持すると良い。   Further, in the case of an electrophoretic display device using microcapsules as a structure for partitioning pixels as shown in FIG. 3, the first electrodes are arranged in a sheet along a plurality of microcapsules, and It is preferable to bond the first substrate with one electrode. In the case where the first electrode is arranged only on the boundary portion of the pixel A as shown by the reference numeral 5a in FIG. 1 or when the first electrode is arranged almost on the entire surface of the first substrate, It is preferable that the first electrode be electrically connected and kept at the same potential.

ここで、第1電極5aとしては、接着性のある導電性樹脂を用いることができ、具体的には、導電性ポリマー、金属粉、金属繊維、導電性酸化物粉、導電性酸化物繊維、カーボン粉、炭素繊維、グラファイト、グラファイト繊維、導電性繊維から選ばれたものを少なくとも1種以上含む接着性樹脂を用いることができる。このうち、カーボン粉、カーボン繊維を含有する接着性樹脂は非透光性(光吸収性)を有し、導電性ポリマーや導電性酸化粉を含有した接着性樹脂は透光性を有するが、必要に応じてそれらの材料を使い分ければ良い。例えば、第1電極5aとしては東芝株式会社製の導電・接着性液状シリコーンゴムを用いると良い。   Here, as the first electrode 5a, a conductive resin having an adhesive property can be used. Specifically, a conductive polymer, metal powder, metal fiber, conductive oxide powder, conductive oxide fiber, An adhesive resin containing at least one selected from carbon powder, carbon fiber, graphite, graphite fiber, and conductive fiber can be used. Among them, the adhesive resin containing carbon powder and carbon fiber has non-light-transmitting property (light absorbing property), and the adhesive resin containing conductive polymer and conductive oxide powder has light-transmitting property. These materials can be used as needed. For example, as the first electrode 5a, a conductive and adhesive liquid silicone rubber manufactured by Toshiba Corporation may be used.

尚、第1基板1aの接着側面にはプライマー処理をすることで接着性を向上させることができる。また、第1電極5aとして光散乱性を有する材料や光反射性を有する材料を用いても良い。   Note that the adhesion can be improved by performing a primer treatment on the bonding side surface of the first substrate 1a. Further, a material having a light scattering property or a material having a light reflecting property may be used as the first electrode 5a.

尚、第1電極の色味は、該電極の配置個所や形状や寸法に応じて変えれば良い。   Note that the color of the first electrode may be changed according to the location, shape, and size of the electrode.

図1では第1電極が画素Aの境界部分にのみ配置されているが、図3は,予めマイクロカプセルに泳動分散液を封入し、これを一方の基板上に配置して他方基板で挟み、押さえつけて球形のマイクロカプセルを平坦に変形させた電気泳動表示装置を示す。   In FIG. 1, the first electrode is arranged only at the boundary portion of the pixel A, but in FIG. 3, the electrophoretic dispersion liquid is sealed in advance in microcapsules, and this is arranged on one substrate and sandwiched by the other substrate. 1 shows an electrophoretic display device in which a spherical microcapsule is deformed flat by pressing.

カプセルの外壁のうち、上下の基板に接しない部分が隔壁を構成する。この場合は,上下に帯電泳動粒子を移動させるために、第1電極は第1基板の全面に配置される。第1基板を底面として配置し、第1電極を黒色にすることによりコントラストが向上する。   Portions of the outer wall of the capsule that do not contact the upper and lower substrates constitute partition walls. In this case, the first electrode is arranged on the entire surface of the first substrate to move the charged electrophoretic particles up and down. The contrast is improved by disposing the first substrate as a bottom surface and making the first electrode black.

図4は、第1電極5aを第1基板1aとは別にシート状に形成した例である。隔壁2を第2基板1b上に形成し、泳動分散液3と帯電粒子4を注入した後、その上を覆って第1電極シート5aをかぶせる。第1基板1a面を表示面にする場合は第1電極シートを透光性材料で形成する。   FIG. 4 shows an example in which the first electrode 5a is formed in a sheet shape separately from the first substrate 1a. After the partition walls 2 are formed on the second substrate 1b and the electrophoretic dispersion liquid 3 and the charged particles 4 are injected, the first electrode sheet 5a is covered thereon. When the surface of the first substrate 1a is used as a display surface, the first electrode sheet is formed of a translucent material.

ところで、上述した第1電極5aは、絶縁性液体3にて溶けないように工夫しておく必要がある。その方法としては、
(1) 図2に示すように、第1電極5aを第1基板11aに埋め込んでしまって、絶縁性液体3に接触しないようにする方法
(2) 絶縁性液体3に溶けにくい材質(不溶性の高い材質)のもので第1電極5aを形成する方法
(3) 第1電極5aの表面に皮膜を設ける方法
を挙げることができる。また、第1電極5aから帯電粒子4への電荷注入を防止する必要があり、その方法としては、
(4) 上記(1)の方法
(5) 第1電極5aの表面に絶縁膜を設ける方法
(6) 絶縁膜を設けないで、第1電極表面自体の絶縁性を高める方法
を挙げることができる。
By the way, it is necessary to devise the first electrode 5a so as not to be dissolved in the insulating liquid 3. As a method,
(1) As shown in FIG. 2, a method of embedding the first electrode 5a in the first substrate 11a so as not to contact the insulating liquid 3
(2) A method of forming the first electrode 5a using a material that is hardly soluble in the insulating liquid 3 (a material having high insolubility)
(3) A method of providing a film on the surface of the first electrode 5a can be mentioned. In addition, it is necessary to prevent charge injection from the first electrode 5a into the charged particles 4, and as a method thereof,
(4) Method of (1) above
(5) A method of providing an insulating film on the surface of the first electrode 5a
(6) A method of improving the insulating property of the first electrode surface itself without providing an insulating film can be mentioned.

尚、本実施の形態で説明する第1電極5aと第2電極5bは、電気泳動表示装置に含まれる一対の電極の配置や形状を制限するものではない。   Note that the first electrode 5a and the second electrode 5b described in this embodiment do not limit the arrangement and shape of a pair of electrodes included in the electrophoretic display device.

図1に示す電気泳動表示装置を製造するには、
・ 第2基板1bに第2電極5bや絶縁層や隔壁部材2を形成し、
・ 隔壁部材2に第1電極5aを形成し、
・ 隔壁部材2にて区画された凹部に絶縁性液体3や帯電粒子4を充填し、
・ 第1基板1aを貼り付け、
・ 第1電極5aを硬化させれば良い。
To manufacture the electrophoretic display device shown in FIG.
Forming the second electrode 5b, the insulating layer and the partition member 2 on the second substrate 1b,
A first electrode 5a is formed on the partition member 2;
Filling the insulating liquid 3 and the charged particles 4 into the recesses defined by the partition member 2;
-Paste the first substrate 1a,
-The first electrode 5a may be cured.

本実施の形態によれば、第1電極5aが接着機能を有するために、従来必要であった接着層塗布用の製造工程や製造装置が不要となり、製造工程を簡略化できる。その結果、製造歩留りや製造コストを低減することができる。   According to the present embodiment, since the first electrode 5a has an adhesive function, a manufacturing process and a manufacturing apparatus for applying an adhesive layer, which are conventionally required, become unnecessary, and the manufacturing process can be simplified. As a result, manufacturing yield and manufacturing cost can be reduced.

本発明に係る電気泳動表示装置の構造の一例を示す断面図。FIG. 1 is a cross-sectional view illustrating an example of the structure of an electrophoretic display device according to the present invention. 本発明に係る電気泳動表示装置の構造の一例を示す断面図。FIG. 1 is a cross-sectional view illustrating an example of the structure of an electrophoretic display device according to the present invention. 本発明に係る電気泳動表示装置の構造の一例を示す断面図。FIG. 1 is a cross-sectional view illustrating an example of the structure of an electrophoretic display device according to the present invention. 本発明に係る電気泳動表示装置の構造の一例を示す断面図。FIG. 1 is a cross-sectional view illustrating an example of the structure of an electrophoretic display device according to the present invention.

符号の説明Explanation of reference numerals

1a 第1基板
1b 第2基板
2 隔壁部材
3 絶縁性液体
4 帯電粒子
5a 第1電極
5b 第2電極
6 マイクロカプセル
A 画素
1a first substrate 1b second substrate 2 partition member 3 insulating liquid 4 charged particles 5a first electrode 5b second electrode 6 microcapsule A pixel

Claims (7)

間隙を開けて対向して配置された第1基板及び第2基板と、該間隙に配置され、該間隙を複数の区画に仕切る隔壁と、該区画に配置された絶縁性液体及び複数の帯電粒子と、少なくとも隔壁と第1基板との間に配置された第1電極と、第2基板上の第2電極と、を備えた電気泳動表示装置において、
該第1電極が接着性を有することを特徴とする電気泳動表示装置。
A first substrate and a second substrate which are arranged to face each other with a gap therebetween, a partition which is arranged in the gap and divides the gap into a plurality of sections, an insulating liquid and a plurality of charged particles arranged in the sections An electrophoretic display device comprising: a first electrode disposed between at least the partition and the first substrate; and a second electrode on the second substrate.
An electrophoretic display device, wherein the first electrode has an adhesive property.
前記第1電極が、導電性ポリマー、金属粉、金属繊維、導電性酸化物粉、導電性酸化物繊維、カーボン粉、炭素繊維、グラファイト、グラファイト繊維、導電性繊維からなる群から選ばれた少なくとも1つの材料を含有する接着性樹脂であることを特徴とする請求項1に記載の電気泳動表示装置。   The first electrode is at least one selected from the group consisting of a conductive polymer, metal powder, metal fiber, conductive oxide powder, conductive oxide fiber, carbon powder, carbon fiber, graphite, graphite fiber, and conductive fiber. The electrophoretic display device according to claim 1, wherein the electrophoretic display device is an adhesive resin containing one material. 前記第2基板に対抗する前記第1基板の面に接着性を向上させるプライマー処理が施されていることを特徴とする請求項1に記載の電気泳動表示装置。   2. The electrophoretic display device according to claim 1, wherein a surface of the first substrate opposing the second substrate is subjected to a primer treatment for improving adhesiveness. 3. 前記第1基板の隔壁に接触する位置に凹部が設けられ、前記第1電極が該凹部の内部に配置されていることを特徴とする請求項1に記載の電気泳動表示装置。   2. The electrophoretic display device according to claim 1, wherein a concave portion is provided at a position in contact with the partition wall of the first substrate, and the first electrode is disposed inside the concave portion. 3. 前記第1電極が隔壁と第1基板との間以外の第1基板面にも設けられていることを特徴とする請求項1に記載の電気泳動表示装置。   The electrophoretic display device according to claim 1, wherein the first electrode is provided on a first substrate surface other than between the partition and the first substrate. 前記第1電極が接着性を有するシートであり、隔壁と絶縁性液体を覆って配置されていることを特徴とする請求項1に記載の電気泳動表示装置。   The electrophoretic display device according to claim 1, wherein the first electrode is a sheet having an adhesive property, and is disposed so as to cover the partition and the insulating liquid. 前記絶縁性液体及び複数の帯電粒子がカプセルに封入されて該間隙に配置され、該カプセルの外壁が前記隔壁を構成することを特徴とする請求項1に記載の電気泳動表示装置。
The electrophoretic display device according to claim 1, wherein the insulating liquid and the plurality of charged particles are sealed in a capsule and arranged in the gap, and an outer wall of the capsule forms the partition.
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JP2012002924A (en) * 2010-06-15 2012-01-05 Seiko Epson Corp Electrophoretic display device

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JP2012002924A (en) * 2010-06-15 2012-01-05 Seiko Epson Corp Electrophoretic display device

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