JP2007219503A - Electrophoretic display sheet, electrophoretic display device and electronic equipment - Google Patents

Electrophoretic display sheet, electrophoretic display device and electronic equipment Download PDF

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JP2007219503A
JP2007219503A JP2006354016A JP2006354016A JP2007219503A JP 2007219503 A JP2007219503 A JP 2007219503A JP 2006354016 A JP2006354016 A JP 2006354016A JP 2006354016 A JP2006354016 A JP 2006354016A JP 2007219503 A JP2007219503 A JP 2007219503A
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electrophoretic display
substrate
display sheet
transparent substrate
display device
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JP5382395B2 (en
Inventor
Takeo Kawase
健夫 川瀬
Takehisa Saeki
勇久 佐伯
Hitoshi Yamamoto
均 山本
Tsutomu Miyamoto
勉 宮本
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Seiko Epson Corp
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Seiko Epson Corp
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Priority to JP2006354016A priority Critical patent/JP5382395B2/en
Priority to KR1020070006616A priority patent/KR101253110B1/en
Priority to CN2007100040583A priority patent/CN101008760B/en
Priority to CN2010102897441A priority patent/CN102033384B/en
Priority to US11/657,929 priority patent/US7733559B2/en
Publication of JP2007219503A publication Critical patent/JP2007219503A/en
Priority to US12/392,123 priority patent/US7829795B2/en
Priority to US12/897,815 priority patent/US8258406B2/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/16—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions by control of light from an independent source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
    • G09G3/3446—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices with more than two electrodes controlling the modulating element

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrophoretic display device having an excellent display quality and electric characteristic by mitigating a stress applied to a driving substrate when an electrophoretic display sheet is attached to the driving substrate. <P>SOLUTION: The electrophoretic display device comprises: at least an electrophoretic display layer stacked on the driving substrate provided with a semiconductor circuit layer; and a transparent substrate which is stacked on the electrophoretic display layer and has a transparent electrode layer, wherein a stress-mitigating means of mitigating the stress applied to the driving substrate when the electrophoretic display sheet is attached to the driving substrate is included. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、媒体中の荷電粒子が電圧の印加によって移動する電気泳動を画像形成に利用した電気泳動表示シート、電気泳動表示装置、及び電子機器に関し、特に電気泳動表示シートが駆動基板に貼り合わされる際の駆動基板にかかる応力を緩和して駆動回路の破損を防止することができる電気泳動表示シート、電気泳動表示装置、及び電子機器に関する。   The present invention relates to an electrophoretic display sheet, an electrophoretic display device, and an electronic apparatus that use electrophoresis in which charged particles in a medium move by applying a voltage for image formation, and in particular, the electrophoretic display sheet is bonded to a drive substrate. The present invention relates to an electrophoretic display sheet, an electrophoretic display device, and an electronic apparatus that can relieve stress applied to a driving substrate during the operation and prevent damage to a driving circuit.

電気泳動素子を備える電気泳動表示装置（いわゆるＥＰＤ表示装置）は、溶媒中に分散された粒子が電圧の印加によって移動する電気泳動を利用した表示デバイスであり、マイクロカプセル型電気泳動方式、水平移動型電気泳動方式、垂直型電気泳動方式等が開発されている。ＥＰＤ表示装置は、ＬＣＤと比較して加工や取り扱いが容易であり、携帯機器や情報機器への用途が期待されている。   An electrophoretic display device (so-called EPD display device) having an electrophoretic element is a display device that uses electrophoresis in which particles dispersed in a solvent move by application of a voltage. Type electrophoresis system, vertical electrophoresis system, etc. have been developed. EPD display devices are easier to process and handle than LCDs, and are expected to be used for portable devices and information devices.

電気泳動表示装置は、電気泳動素子をプラスチック透明基板上に形成した電気泳動表示シートと、これを駆動する素子や電極が形成された駆動基板とを貼り合わせて作製される。
この貼り合わせの際の圧力によって、電気泳動表示シートの端部が駆動基板に食い込み、電気泳動表示シートが備える透明電極が駆動電極に接触してショートする、あるいは、薄膜トランジスタ回路部が破壊する、といったトラブルを防止するため、従来では、駆動基板の端部に保護シートを形成し、電気泳動表示シートの端部から駆動回路を保護していた。 The electrophoretic display device is manufactured by bonding an electrophoretic display sheet in which an electrophoretic element is formed on a plastic transparent substrate, and a driving substrate on which elements and electrodes for driving the electrophoretic display sheet are formed.
Due to the pressure at the time of bonding, the end of the electrophoretic display sheet bites into the drive substrate, the transparent electrode provided in the electrophoretic display sheet contacts the drive electrode, and the thin film transistor circuit part is destroyed. In order to prevent trouble, conventionally, a protective sheet is formed on the end portion of the drive substrate, and the drive circuit is protected from the end portion of the electrophoretic display sheet.

しかしながら、従来の方法では、保護シートを貼り付ける工程が必要となり、また、保護シートを貼り付けるための駆動基板上の一定の面積が必要であった。
また、保護シートはシートとしての強度を得るため通常５０〜１００μｍ程度の厚みが必要とされるが、この厚みは電気泳動カプセルの表示層の厚み（例えば、２０〜３０μｍ）より大きいため、保護シート周辺の電気泳動表示シートが浮き上がり、電気特性を低下させてしまうという問題もあった。 However, the conventional method requires a step of attaching a protective sheet, and also requires a certain area on the drive substrate for attaching the protective sheet.
The protective sheet usually requires a thickness of about 50 to 100 μm in order to obtain strength as a sheet, but this thickness is larger than the thickness of the display layer of the electrophoretic capsule (for example, 20 to 30 μm). There was also a problem that the peripheral electrophoretic display sheet floated and the electrical characteristics were deteriorated.

上記問題は、フレキシブルな電気泳動表示体を実現するために、駆動基板が備える背面基板としてプラスチック基板のような柔らかい材料を用いた場合、一層顕著となる。すなわち、プラスチック基板上に駆動回路が形成されているため、応力に弱く、電気泳動表示シートとの張り合わせの際、電気泳動表示シートの端部が駆動基板に押し付けられると、応力集中によって、プラスチック基板上の駆動回路が容易に破壊されてしまう。   The above problem becomes more conspicuous when a soft material such as a plastic substrate is used as the back substrate included in the drive substrate in order to realize a flexible electrophoretic display. In other words, since the drive circuit is formed on the plastic substrate, it is weak against stress, and when the end of the electrophoretic display sheet is pressed against the drive substrate at the time of bonding with the electrophoretic display sheet, the plastic substrate is caused by stress concentration. The upper drive circuit is easily destroyed.

また、上記問題は、外部接続端子が設けられていない駆動基板の端部においては、透明基板の端部が駆動基板の回路領域の外に配置されるように設計することによって回避することができるが、この場合、配線や駆動回路等の余計なパターンが電気泳動表示シート上に表示されてしまう。
また、外部接続端子が設けられている駆動基板の端部においては、駆動基板の回路領域から外部接続端子へ連通する配線があるため、やはり配線や駆動回路等の余計なパターンが電気泳動表示シート上に表示されてしまうという問題がある。 The above problem can be avoided by designing the end portion of the transparent substrate at the end portion of the drive substrate not provided with the external connection terminal to be disposed outside the circuit area of the drive substrate. In this case, however, an extra pattern such as a wiring or a drive circuit is displayed on the electrophoretic display sheet.
In addition, since there is a wiring that communicates from the circuit area of the driving board to the external connecting terminal at the end of the driving board where the external connection terminal is provided, an extra pattern such as a wiring or a driving circuit is also formed on the electrophoretic display sheet. There is a problem of being displayed above.

そこで、本発明は、電気泳動表示シートを駆動基板に貼り合わせた際の駆動回路の破損を防止することができ、優れた表示品質及び電気特性を有する電気泳動表示シート、及び電気泳動表示装置を提供することを目的とする。   Accordingly, the present invention provides an electrophoretic display sheet and an electrophoretic display device that can prevent the drive circuit from being damaged when the electrophoretic display sheet is bonded to the drive substrate, and have excellent display quality and electrical characteristics. The purpose is to provide.

本発明者は、鋭意検討の結果、半導体回路層が設けられた駆動基板の上に積層される電気泳動表示層と、前記電気泳動表示層の上に積層され、透明電極層を有する透明基板と、を少なくとも含む電気泳動表示シートであって、該電気泳動表示シートが駆動基板に貼り合わされる際に前記電気泳動表示層にかかる応力を緩和する応力緩和手段を含む、電気泳動表示シートを採用することにより、貼り合せた際の駆動回路の破損を防止することができ、優れた表示品質及び電気特性を有する電気泳動表示装置が得られることを見出し、本発明を完成するに至った。   As a result of intensive studies, the inventor has conducted an electrophoretic display layer that is laminated on a drive substrate provided with a semiconductor circuit layer, and a transparent substrate that is laminated on the electrophoretic display layer and has a transparent electrode layer. The electrophoretic display sheet includes at least stress relieving means that relieves stress applied to the electrophoretic display layer when the electrophoretic display sheet is bonded to a drive substrate. As a result, it was found that an electrophoretic display device having excellent display quality and electrical characteristics can be obtained, and the present invention was completed.

すなわち、本発明は、（１）半導体回路層が設けられた駆動基板の上に積層される電気泳動表示層と、前記電気泳動表示層の上に積層され、透明電極層を有する透明基板と、を少なくとも含む電気泳動表示シートであって、該電気泳動表示シートが駆動基板に貼り合わされる際に駆動基板にかかる応力を緩和する応力緩和手段を含む、電気泳動表示シート；（２）前記応力緩和手段は、前記透明基板の端部が駆動基板の外延よりも延出する延出部であって、該延出部が駆動基板が備えるフレキシブル配線基板の上面の一部又は全部に当接するものである、前記（１）記載の電気泳動表示シート；（３）前記応力緩和手段は、前記透明基板の端部下側に駆動基板に対向して配置された緩衝部である、前記（１）記載の電気泳動表示シート；（４）前記応力緩和手段は、前記透明基板の端部下側に配置された保護シートであり、該保護シートは駆動基板が備えるフレキシブル配線基板上に予め一体化されたものである、前記（１）記載の電気泳動表示シート；（５）前記透明基板は、可撓性であり、前記応力緩和手段は、前記透明基板の端部下側における、該電気泳動表示シートが駆動基板に貼り合わされる際に駆動基板と面接触する面接触手段である、前記（１）記載の電気泳動表示シート；（６）前記面接触手段は、前記透明基板の端部下側が面取りされた曲面である、前記（５）記載の電気泳動表示シート；（７）前記曲面は、曲率Ｒが前記透明基板の厚さの１／１０以上である、前記（６）記載の電気泳動表示シート；（８）前記曲面をなす部位が弾性部材で構成されてなる、前記（６）又は（７）記載の電気泳動表示シート；（９）前記面接触手段は、前記透明基板の端部下側に設けられたスカート部である、前記（５）記載の電気泳動表示シート；（１０）前記（１）〜（９）の何れか１項に記載の電気泳動表示シートと、半導体回路層及びフレキシブル配線基板を備えた駆動基板と、を少なくとも含む、電気泳動表示装置；（１１）前記（５）〜（９）の何れか１項に記載の電気泳動表示シートと、半導体回路層及びフレキシブル配線基板を備えた駆動基板と、を少なくとも含む、電気泳動表示装置であって、前記透明基板の端部上側であって、前記駆動基板と面接触する部位に、保護シートが設けられた、電気泳動表示装置；（１２）前記（１０）又は（１１）記載の電気泳動表示装置を備えた、電子機器；を提供する。   That is, the present invention includes (1) an electrophoretic display layer laminated on a driving substrate provided with a semiconductor circuit layer, a transparent substrate laminated on the electrophoretic display layer and having a transparent electrode layer, An electrophoretic display sheet comprising at least a stress relieving means for relieving stress applied to the drive substrate when the electrophoretic display sheet is bonded to the drive substrate; (2) the stress relaxation The means is an extension portion in which an end portion of the transparent substrate extends beyond the outer extension of the drive substrate, and the extension portion contacts a part or all of the upper surface of the flexible wiring board provided in the drive substrate. The electrophoretic display sheet according to (1), wherein (3) the stress relieving means is a buffer portion disposed on the lower side of the end of the transparent substrate so as to face the drive substrate. Electrophoresis display sheet; (4 The said stress relaxation means is a protective sheet arrange | positioned under the edge part of the said transparent substrate, This protective sheet is previously integrated on the flexible wiring board with which a drive board is provided, The said (1) description (5) The transparent substrate is flexible, and the stress relaxation means is provided on the drive substrate when the electrophoretic display sheet is bonded to the drive substrate below the end of the transparent substrate. The electrophoretic display sheet according to (1), wherein the electrophoretic display sheet is in surface contact with the surface of the transparent substrate. (6) The surface contact means is a curved surface in which the lower side of the end of the transparent substrate is chamfered. (7) The curved surface has an curvature R of 1/10 or more of the thickness of the transparent substrate. (8) The curved surface is elastic at a portion forming the curved surface. Composed of members, The electrophoretic display sheet according to (6) or (7); (9) The electrophoretic display sheet according to (5), wherein the surface contact means is a skirt provided below the end of the transparent substrate. (10) An electrophoretic display device comprising at least the electrophoretic display sheet according to any one of (1) to (9) and a drive substrate including a semiconductor circuit layer and a flexible wiring substrate; 11) An electrophoretic display device comprising at least the electrophoretic display sheet according to any one of (5) to (9) above, and a drive substrate including a semiconductor circuit layer and a flexible wiring substrate, An electrophoretic display device provided with a protective sheet at a portion in upper surface of the transparent substrate and in surface contact with the drive substrate; (12) The electrophoretic display device according to (10) or (11) An electronic device comprising: provide.

本発明によれば、電気泳動表示シートが駆動基板に貼り合わされる際に駆動基板にかかる応力を緩和することができ、駆動回路の破損を防止し、優れた表示品質及び電気特性を有する電気泳動式表示装置を提供することができる。   According to the present invention, it is possible to relieve the stress applied to the drive substrate when the electrophoretic display sheet is bonded to the drive substrate, prevent the drive circuit from being damaged, and have excellent display quality and electrical characteristics. A formula display device can be provided.

次に、本発明の実施の形態について説明する。以下の実施形態は、本発明を説明するための例示であり、本発明をこの実施形態にのみ限定する趣旨ではない。本発明は、その要旨を逸脱しない限り、さまざまな形態で実施することができる。
以下、本発明の実施の形態を図面を参照して説明する。 Next, an embodiment of the present invention will be described. The following embodiment is an example for explaining the present invention, and is not intended to limit the present invention only to this embodiment. The present invention can be implemented in various forms without departing from the gist thereof.
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（実施例１）
本発明の実施例１の電気泳動表示装置１０の一部断面図を図１に示し、電気泳動表示装置１０を上方から見た図を図２に示す。
図１及び図２に示すように、電気泳動表示装置１０は、電気泳動表示シート３０と、駆動基板４０とから構成される。電気泳動表示装置１０は、可撓性の駆動基板４０の上に可撓性の電気泳動表示シート３０がラミネートされて作製されることが好ましい。 Example 1
FIG. 1 shows a partial cross-sectional view of the electrophoretic display device 10 of Example 1 of the present invention, and FIG. 2 shows a view of the electrophoretic display device 10 as viewed from above.
As shown in FIGS. 1 and 2, the electrophoretic display device 10 includes an electrophoretic display sheet 30 and a drive substrate 40. The electrophoretic display device 10 is preferably manufactured by laminating a flexible electrophoretic display sheet 30 on a flexible drive substrate 40.

電気泳動表示シート３０は、電気泳動表示層３３と、その上に積層され、下面に透明電極層３２が形成された透明基板３１とから構成されている。透明基板３１は、透明な絶縁性合成樹脂であり、例えば、ポリエチレンテレフタレート（ＰＥＴ）フィルムである。透明電極層３２は、例えば、錫がドープされた酸化インジウム膜（ＩＴＯ膜）である。   The electrophoretic display sheet 30 includes an electrophoretic display layer 33 and a transparent substrate 31 laminated thereon and having a transparent electrode layer 32 formed on the lower surface. The transparent substrate 31 is a transparent insulating synthetic resin, for example, a polyethylene terephthalate (PET) film. The transparent electrode layer 32 is, for example, an indium oxide film (ITO film) doped with tin.

電気泳動表示層３３は、透明樹脂からなるマイクロカプセルの中に電気泳動分散液が封入されたものを備えている。電気泳動分散液は、透明な絶縁性液体とプラスに帯電された白色粒子とマイナスに帯電された黒色顔料を封入して構成される。電気泳動粒子は印加電圧に応じて電気泳動分散媒中を移動する性質を有する。電気泳動表示層３３の膜厚は、例えば、２０〜３０μｍである。   The electrophoretic display layer 33 includes a microcapsule made of a transparent resin in which an electrophoretic dispersion is sealed. The electrophoretic dispersion is configured by enclosing a transparent insulating liquid, positively charged white particles, and negatively charged black pigment. The electrophoretic particles have a property of moving in the electrophoretic dispersion medium according to the applied voltage. The thickness of the electrophoretic display layer 33 is, for example, 20 to 30 μm.

駆動基板４０は、絶縁性下地基板としての背面基板４４と、その上に順次積層された半導体回路層４３、ゲート線層４２、及び保護層４１を備えている。
背面基板４４は、ガラスでもよいが、好ましくは、例えば膜厚２００μｍのポリカーボネート等のプラスチック基板である。背面基板４４上には、ＵＶ（紫外線）硬化型接着剤等を介して、画素電極５２、データ線５３、及び有機半導体５１が行方向及び列方向に複数形成されており、これらによって薄膜トランジスタ５４が複数形成されている。マトリクス状に配列された画素電極５２群は画像（２次元情報）を表示する表示エリアを形成している。
薄膜トランジスタ５４としては、例えば、有機ＴＦＴ、アモルファスＳｉＴＦＴ、ポリＳｉＴＦＴ等が用いられる。 The drive substrate 40 includes a back substrate 44 as an insulating base substrate, a semiconductor circuit layer 43, a gate line layer 42, and a protective layer 41 sequentially stacked thereon.
The back substrate 44 may be glass, but is preferably a plastic substrate such as polycarbonate having a film thickness of 200 μm, for example. A plurality of pixel electrodes 52, data lines 53, and organic semiconductors 51 are formed in the row direction and the column direction on the back substrate 44 via UV (ultraviolet) curable adhesive or the like, thereby forming the thin film transistor 54. A plurality are formed. The group of pixel electrodes 52 arranged in a matrix form a display area for displaying an image (two-dimensional information).
As the thin film transistor 54, for example, an organic TFT, an amorphous Si TFT, a poly Si TFT, or the like is used.

このような基板上に薄膜半導体回路を形成する態様については、例えば、特開平１０−１２５９３１号公報、特開平１１−２６７３３号公報、特開２００４−３２７８３６号公報等で紹介されている、耐熱基板（ガラス基板）上で薄膜半導体回路を形成してこの薄膜半導体回路を樹脂基板上に全体的にあるいは部分的に転写する薄膜回路の転写手法を使用することができる。   With respect to an aspect of forming a thin film semiconductor circuit on such a substrate, for example, a heat-resistant substrate introduced in JP-A-10-125931, JP-A-11-26733, JP-A-2004-327836, etc. A thin film circuit transfer method can be used in which a thin film semiconductor circuit is formed on a (glass substrate) and the thin film semiconductor circuit is transferred entirely or partially onto a resin substrate.

背面基板４４上の画素電極５２の端部には、外部接続端子６１及び異方導電性シート６３を介して、フレキシブル配線基板（ＦＰＣ）６２が接続されている。フレキシブル配線基板６２は、例えば、ポリアミドである。
透明電極層３２が形成された透明基板３１の端部は、駆動基板４０の外延よりも延出する延出部３５を有しており、該延出部３５がフレキシブル配線基板６２の上面の一部に当接している。 A flexible wiring board (FPC) 62 is connected to the end of the pixel electrode 52 on the back substrate 44 via an external connection terminal 61 and an anisotropic conductive sheet 63. The flexible wiring board 62 is made of polyamide, for example.
The end portion of the transparent substrate 31 on which the transparent electrode layer 32 is formed has an extending portion 35 that extends beyond the outer extension of the drive substrate 40, and the extending portion 35 is provided on the upper surface of the flexible wiring substrate 62. It is in contact with the part.

本実施例１においては、上記構成としたため、透明基板３１の端部が駆動基板４０に当接するのを防ぐことができる。すなわち、電気泳動表示シート３０が駆動基板４０に貼り合わされる際に駆動基板４０にかかる応力を緩和することができ、優れた表示品質及び電気特性を有する電気泳動表示装置を実現することができる。   In the first embodiment, the configuration described above can prevent the end portion of the transparent substrate 31 from coming into contact with the drive substrate 40. That is, the stress applied to the drive substrate 40 when the electrophoretic display sheet 30 is bonded to the drive substrate 40 can be relaxed, and an electrophoretic display device having excellent display quality and electrical characteristics can be realized.

なお、上記においては、マイクロカプセル型電気泳動方式の表示層を備える表示装置について説明したが、本発明はこれに限定されず、水平移動型電気泳動方式や垂直型電気泳動方式の表示装置であってもよい。
また、上記においては、延出部３５がフレキシブル配線基板６２の上面の一部に当接する場合について説明したが、延出部３５がフレキシブル配線基板６２の上面の全部に当接する構成としてもよい。 In the above description, a display device including a microcapsule-type electrophoresis display layer has been described. However, the present invention is not limited to this, and the display device is a horizontal-movement type electrophoresis method or a vertical-type electrophoresis method display device. May be.
Further, in the above description, the case where the extending portion 35 abuts on a part of the upper surface of the flexible wiring board 62 has been described, but the extending portion 35 may abut on the entire upper surface of the flexible wiring substrate 62.

また、上記構成によれば従来のように駆動基板の端部上側に保護シートを形成する必要がない。   Moreover, according to the said structure, it is not necessary to form a protective sheet on the edge part upper side of a drive board | substrate conventionally.

（実施例２）
本発明の実施例２の電気泳動表示装置１１の一部断面図を図３に示す。
図３に示すように、実施例２の電気泳動表示装置１１は、延出部３５に代えて、緩衝部３７を備えた点のみが、実施例１とは異なる。図３において、図１と対応する部分には同一符号を付し、かかる部分の説明は省略する。
緩衝部３７は、透明電極層３２が形成された透明基板３１の端部下側に、駆動基板４０に対向して配置されている。 (Example 2)
FIG. 3 shows a partial cross-sectional view of the electrophoretic display device 11 of Example 2 of the present invention.
As shown in FIG. 3, the electrophoretic display device 11 according to the second embodiment is different from the first embodiment only in that a buffer portion 37 is provided instead of the extending portion 35. 3, parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
The buffer portion 37 is disposed on the lower side of the end portion of the transparent substrate 31 on which the transparent electrode layer 32 is formed so as to face the drive substrate 40.

本実施例２においても、透明基板３１の端部が駆動基板４０に当接するのを防ぐことができる。すなわち、電気泳動表示シート３０が駆動基板４０に貼り合わされる際に駆動基板４０にかかる応力を緩和することができ、優れた表示品質及び電気特性を有する電気泳動表示装置を実現することができる。   Also in the second embodiment, it is possible to prevent the end portion of the transparent substrate 31 from coming into contact with the drive substrate 40. That is, the stress applied to the drive substrate 40 when the electrophoretic display sheet 30 is bonded to the drive substrate 40 can be relaxed, and an electrophoretic display device having excellent display quality and electrical characteristics can be realized.

（実施例３）
図４（ａ）は、本発明の実施例３の電気泳動表示装置１２の一部断面図であり、図４（ｂ）は、組み立て前において保護シート３９、フレキシブル配線基板６２、及び異方導電性シート６３が一体化された状態を示す図である。図５は、電気泳動表示装置１２を上方から見た図である。 (Example 3)
FIG. 4A is a partial cross-sectional view of the electrophoretic display device 12 according to the third embodiment of the present invention. FIG. 4B shows the protective sheet 39, the flexible wiring board 62, and the anisotropic conductive material before assembly. It is a figure which shows the state in which the adhesive sheet 63 was integrated. FIG. 5 is a view of the electrophoretic display device 12 as viewed from above.

図４及び図５に示すように、実施例３の電気泳動表示装置１２は、延出部３５に代えて、保護シート３９を備えた点のみが、実施例１とは異なる。図４（ｂ）に示すように、保護シート３９の先端部は、駆動基板４０が備えるフレキシブル配線基板６２上に接着され予め一体化されたものである。
図４（ｂ）に示す一体化されたパーツを組み込むことにより、図４（ａ）に示すように、保護シート３９の端部は、駆動基板４０及び透明電極層３２が形成された透明基板３１の間に配置される。 As shown in FIGS. 4 and 5, the electrophoretic display device 12 of the third embodiment is different from the first embodiment only in that a protective sheet 39 is provided instead of the extending portion 35. As shown in FIG. 4B, the front end portion of the protection sheet 39 is bonded and integrated in advance on the flexible wiring substrate 62 provided in the drive substrate 40.
By incorporating the integrated parts shown in FIG. 4 (b), as shown in FIG. 4 (a), the end portion of the protective sheet 39 is formed on the transparent substrate 31 on which the drive substrate 40 and the transparent electrode layer 32 are formed. It is arranged between.

本実施例３においても、透明基板３１の端部が駆動基板４０に当接するのを防ぐことができる。すなわち、電気泳動表示シート３０が駆動基板４０に貼り合わされる際に駆動基板４０にかかる応力を緩和することができ、優れた表示品質及び電気特性を有する電気泳動表示装置を実現することができる。   Also in the third embodiment, it is possible to prevent the end portion of the transparent substrate 31 from coming into contact with the drive substrate 40. That is, the stress applied to the drive substrate 40 when the electrophoretic display sheet 30 is bonded to the drive substrate 40 can be relaxed, and an electrophoretic display device having excellent display quality and electrical characteristics can be realized.

（実施例４）
図６（ａ）は、本発明の実施例４の電気泳動表示装置１３の一部断面図であり、図６（ｂ）は、組み立て前において保護シート１３９、フレキシブル配線基板６２、及び異方導電性シート６３が一体化された状態を示す図である。 Example 4
FIG. 6A is a partial cross-sectional view of the electrophoretic display device 13 according to the fourth embodiment of the present invention. FIG. 6B illustrates the protective sheet 139, the flexible wiring board 62, and the anisotropic conductive material before assembly. It is a figure which shows the state in which the adhesive sheet 63 was integrated.

図６に示すように、実施例４の電気泳動表示装置１３は、保護シート３９に代えて、保護シート１３９を備えた点のみが実施例３とは異なる。図６（ｂ）に示すように、保護シート１３９は、フレキシブル配線基板６２を構成する樹脂と同じ樹脂からなり、予め一体化して成型される。
実施例４においても、図６（ａ）に示すように、保護シート１３９の端部は、駆動基板４０及び透明電極層３２が形成された透明基板３１の間に配置される。 As shown in FIG. 6, the electrophoretic display device 13 of Example 4 is different from Example 3 only in that a protective sheet 139 is provided instead of the protective sheet 39. As shown in FIG. 6B, the protective sheet 139 is made of the same resin as that constituting the flexible wiring board 62, and is integrally molded in advance.
Also in Example 4, as shown to Fig.6 (a), the edge part of the protection sheet 139 is arrange | positioned between the drive substrate 40 and the transparent substrate 31 in which the transparent electrode layer 32 was formed.

本実施例４においても、透明基板３１の端部が駆動基板４０に当接するのを防ぐことができる。すなわち、電気泳動表示シート３０が駆動基板４０に貼り合わされる際に駆動基板４０にかかる応力を緩和することができ、優れた表示品質及び電気特性を有する電気泳動表示装置を実現することができる。   Also in the fourth embodiment, it is possible to prevent the end of the transparent substrate 31 from coming into contact with the drive substrate 40. That is, the stress applied to the drive substrate 40 when the electrophoretic display sheet 30 is bonded to the drive substrate 40 can be relaxed, and an electrophoretic display device having excellent display quality and electrical characteristics can be realized.

（実施例５）
本発明の実施例５の電気泳動表示装置１０’の一部断面図を図７に示す。
図７に示すように、電気泳動表示装置１０’は、電気泳動表示シート３０と、駆動基板４０とから構成される。電気泳動表示装置１０’は、可撓性の駆動基板４０の上に可撓性の電気泳動表示シート３０がラミネートされて作製されることが好ましい。 (Example 5)
FIG. 7 shows a partial cross-sectional view of the electrophoretic display device 10 ′ according to the fifth embodiment of the present invention.
As shown in FIG. 7, the electrophoretic display device 10 ′ includes an electrophoretic display sheet 30 and a drive substrate 40. The electrophoretic display device 10 ′ is preferably manufactured by laminating a flexible electrophoretic display sheet 30 on a flexible drive substrate 40.

電気泳動表示シート３０は、電気泳動表示層３３と、その上に積層され、下面に透明電極層３２が形成された可撓性の透明基板３１とから構成されている。透明基板３１は、透明な絶縁性合成樹脂であり、例えば、ポリエチレンテレフタレート（ＰＥＴ）フィルムである。透明電極層３２は、例えば、錫がドープされた酸化インジウム膜（ＩＴＯ膜）である。   The electrophoretic display sheet 30 includes an electrophoretic display layer 33 and a flexible transparent substrate 31 laminated thereon and having a transparent electrode layer 32 formed on the lower surface thereof. The transparent substrate 31 is a transparent insulating synthetic resin, for example, a polyethylene terephthalate (PET) film. The transparent electrode layer 32 is, for example, an indium oxide film (ITO film) doped with tin.

電気泳動表示層３３は、透明樹脂からなるマイクロカプセルの中に電気泳動分散液が封入されたものを備えている。電気泳動分散液は、透明な絶縁性液体とプラスに帯電された白色粒子とマイナスに帯電された黒色顔料を封入して構成される。電気泳動粒子は印加電圧に応じて電気泳動分散媒中を移動する性質を有する。電気泳動表示層３３の膜厚は、例えば、２０〜３０μｍである。   The electrophoretic display layer 33 includes a microcapsule made of a transparent resin in which an electrophoretic dispersion is sealed. The electrophoretic dispersion is configured by enclosing a transparent insulating liquid, positively charged white particles, and negatively charged black pigment. The electrophoretic particles have a property of moving in the electrophoretic dispersion medium according to the applied voltage. The film thickness of the electrophoretic display layer 33 is, for example, 20 to 30 μm.

駆動基板４０は、絶縁性下地基板としての背面基板４４と、その上に順次積層された半導体回路層４３、ゲート線層４２、及び保護層４１を備えている。
背面基板４４は、ガラスでもよいが、好ましくは、例えば膜厚２００μｍのポリカーボネート等のプラスチック基板である。背面基板４４上には、ＵＶ（紫外線）硬化型接着剤等を介して、画素電極５２、データ線５３、及び有機半導体５１が行方向及び列方向に複数形成されており、これらによって薄膜トランジスタ５４が複数形成されている。マトリクス状に配列された画素電極５２群は画像（２次元情報）を表示する表示エリアを形成している。
薄膜トランジスタ５４としては、例えば、有機ＴＦＴ、アモルファスＳｉＴＦＴ、ポリＳｉＴＦＴ等が用いられる。 The drive substrate 40 includes a back substrate 44 as an insulating base substrate, a semiconductor circuit layer 43, a gate line layer 42, and a protective layer 41 sequentially stacked thereon.
The back substrate 44 may be glass, but is preferably a plastic substrate such as polycarbonate having a film thickness of 200 μm, for example. A plurality of pixel electrodes 52, data lines 53, and organic semiconductors 51 are formed in the row direction and the column direction on the back substrate 44 via UV (ultraviolet) curable adhesive or the like, thereby forming the thin film transistor 54. A plurality are formed. The group of pixel electrodes 52 arranged in a matrix form a display area for displaying an image (two-dimensional information).
As the thin film transistor 54, for example, an organic TFT, an amorphous Si TFT, a poly Si TFT, or the like is used.

このような基板上に薄膜半導体回路を形成する態様については、例えば、特開平１０−１２５９３１号公報、特開平１１−２６７３３号公報、特開２００４−３２７８３６号公報等で紹介されている、耐熱基板（ガラス基板）上で薄膜半導体回路を形成してこの薄膜半導体回路を樹脂基板上に全体的にあるいは部分的に転写する薄膜回路の転写手法を使用することができる。   With respect to an aspect of forming a thin film semiconductor circuit on such a substrate, for example, a heat-resistant substrate introduced in JP-A-10-125931, JP-A-11-26733, JP-A-2004-327836, etc. A thin film circuit transfer method can be used in which a thin film semiconductor circuit is formed on a (glass substrate) and the thin film semiconductor circuit is transferred entirely or partially onto a resin substrate.

背面基板４４上の画素電極５２の端部には、外部接続端子６１及び異方導電性シート６３を介して、フレキシブル配線基板（ＦＰＣ）６２が接続されている。フレキシブル配線基板６２は、例えば、ポリアミドである。   A flexible wiring substrate (FPC) 62 is connected to the end of the pixel electrode 52 on the back substrate 44 via an external connection terminal 61 and an anisotropic conductive sheet 63. The flexible wiring board 62 is made of polyamide, for example.

透明電極層３２を有する透明基板３１の端部３５’下側は面取りされた曲面をなし、電気泳動表示シート３０を駆動基板４０へ貼り付けた際に、該曲面をなす部位が駆動基板４０の端部上面に当接する。透明基板３１は可撓性でありかつ端部下側が面取りされているので、当接部において曲面をなす部位の一部又は全部が駆動基板４０の上面と面接触する。   The lower portion 35 ′ of the transparent substrate 31 having the transparent electrode layer 32 has a chamfered curved surface, and when the electrophoretic display sheet 30 is attached to the drive substrate 40, the portion forming the curved surface is the portion of the drive substrate 40. Abuts on the upper surface of the end. Since the transparent substrate 31 is flexible and the lower side of the end portion is chamfered, a part or all of the curved portion at the contact portion is in surface contact with the upper surface of the drive substrate 40.

透明基板３１が有する前記曲面は、曲率Ｒが前記透明基板の厚さの１／１０以上であることが好ましく、１／３以上１以下であることが一層好ましい。   The curved surface of the transparent substrate 31 preferably has a curvature R that is not less than 1/10 of the thickness of the transparent substrate, and more preferably not less than 1/3 and not more than 1.

本実施例５においては、上記構成としたため、透明基板３１の下側端部が駆動基板４０に面接触するので、電気泳動表示シート３０が駆動基板４０に貼り合わされる際に駆動基板４０にかかる応力を緩和することができ、駆動回路の破損や断線を防止した、優れた表示品質及び電気特性を有する電気泳動表示装置を実現することができる。   Since the lower end portion of the transparent substrate 31 is in surface contact with the drive substrate 40 in the fifth embodiment, the electrophoretic display sheet 30 is applied to the drive substrate 40 when the electrophoretic display sheet 30 is bonded to the drive substrate 40. An electrophoretic display device having excellent display quality and electrical characteristics that can relieve stress and prevent breakage or disconnection of a drive circuit can be realized.

なお、上記においては、マイクロカプセル型電気泳動方式の表示層を備える表示装置について説明したが、本発明はこれに限定されず、水平移動型電気泳動方式や垂直型電気泳動方式の表示装置であってもよい。   In the above description, a display device including a microcapsule-type electrophoresis display layer has been described. However, the present invention is not limited to this, and the display device is a horizontal-movement type electrophoresis method or a vertical-type electrophoresis method display device. May be.

また、前記曲面をなす部位は、弾性部材で構成されていてもよい。これは、例えば、透明基板３１の端部下側にエラストマーを熱融着することにより作製することができる。このような弾性部材を備えることによって、駆動基板４０の駆動回路の破損や断線を一層有効に防止することができる。   Moreover, the site | part which makes the said curved surface may be comprised with the elastic member. This can be produced, for example, by thermally fusing an elastomer to the lower side of the end portion of the transparent substrate 31. By providing such an elastic member, breakage or disconnection of the drive circuit of the drive substrate 40 can be more effectively prevented.

（実施例６）
本発明の実施例６の電気泳動表示装置１１’の一部断面図を図８に示す。
図８に示すように、実施例６の電気泳動表示装置１１’は、保護シート７１を駆動基板４０の端部上面に備えた点のみが、実施例５とは異なる。図８において、図７と対応する部分には同一符号を付し、かかる部分の説明は省略する。 (Example 6)
FIG. 8 shows a partial cross-sectional view of an electrophoretic display device 11 ′ of Example 6 of the present invention.
As shown in FIG. 8, the electrophoretic display device 11 ′ of the sixth embodiment is different from the fifth embodiment only in that the protective sheet 71 is provided on the upper surface of the end portion of the drive substrate 40. 8, parts corresponding to those in FIG. 7 are denoted by the same reference numerals, and description thereof is omitted.

このように保護シート７１をさらに備えることによって、駆動基板４０の駆動回路の破損や断線を一層有効に防止することができる。   By further providing the protective sheet 71 as described above, it is possible to more effectively prevent the drive circuit of the drive substrate 40 from being damaged or disconnected.

（実施例７〜９）
図９（ａ）〜（ｃ）は、それぞれ実施例７〜９において用いられる透明基板の端部であって、組み立て前の状態を示す図である。
実施例７〜９は、実施例５の透明基板３１に代えて、透明基板１３５、２３５、３３５をそれぞれ備えた点のみが、実施例５とは異なる。図９（ａ）〜（ｃ）に示すように、透明基板１３５、２３５、３３５の端部下側は面取りされた曲面をなしている。これにより、実施例５と同様、電気泳動表示シート３０を駆動基板４０へ貼り付けた際に、該曲面をなす部位が駆動基板４０の上面に面接触する。 (Examples 7 to 9)
FIGS. 9A to 9C are diagrams showing the state of the transparent substrate used in Examples 7 to 9 before assembly.
Examples 7 to 9 differ from Example 5 only in that each of them has transparent substrates 135, 235 and 335 instead of the transparent substrate 31 of Example 5. As shown in FIGS. 9A to 9C, the lower sides of the transparent substrates 135, 235, and 335 are chamfered curved surfaces. As a result, as in the fifth embodiment, when the electrophoretic display sheet 30 is attached to the drive substrate 40, the curved portion comes into surface contact with the upper surface of the drive substrate 40.

このように、実施例７〜９においても、実施例５と同様、電気泳動表示シート３０が駆動基板４０に貼り合わされる際に駆動基板４０にかかる応力を緩和することができ、駆動回路の破損を防止することができる。   Thus, also in Examples 7 to 9, as in Example 5, the stress applied to the drive substrate 40 when the electrophoretic display sheet 30 is bonded to the drive substrate 40 can be alleviated, and the drive circuit is damaged. Can be prevented.

（透明基板の製造方法）
上記実施例５〜９で用いられる、端部下側が面取りされた曲面をなす透明基板は、（ｉ
）透明基板を炭酸ガスレーザーによって切り出すことによって縁を丸くする、（ｉｉ）透明基板の端部を加熱し溶融させ、型に押し付けて丸くする、（ｉｉｉ）透明基板の端部を加熱し溶融させ、表面張力を利用して丸くする、（ｉｖ）透明基板の端部を機械的に切削加工する、（ｖ）紫外線硬化樹脂又は熱硬化性樹脂（例えば、２液混合型エポキシ）を透明基板の縁に滴下又は塗布した後、表面張力を利用して丸くし、さらに紫外線又は熱を加えて硬化させる、等の方法により製造することができる。 (Manufacturing method of transparent substrate)
The transparent substrate used in the above Examples 5 to 9 and having a curved surface with a chamfered lower end is (i
) Round the edge by cutting the transparent substrate with a carbon dioxide laser, (ii) Heat and melt the end of the transparent substrate, press against the mold to round, (iii) Heat and melt the end of the transparent substrate (Iv) mechanically cutting the edge of the transparent substrate, (v) ultraviolet curable resin or thermosetting resin (for example, two-component mixed epoxy) on the transparent substrate. After dropping or coating on the edge, it can be produced by a method such as rounding using surface tension and further curing by applying ultraviolet rays or heat.

（実施例１０）
図１０（ａ）は、本発明の実施例１０に用いられる透明基板１３１の端部であって、組み立て前の状態を示す図であり、図１０（ｂ）は、電気泳動表示装置２０の一部断面図である。
実施例１０の電気泳動表示装置２０は、実施例５の透明基板３１に代えて、透明基板１３１を備えた点のみが、実施例５とは異なる。 (Example 10)
FIG. 10A is a diagram showing an end portion of the transparent substrate 131 used in the tenth embodiment of the present invention and shows a state before assembly. FIG. 10B is a diagram of one of the electrophoretic display devices 20. FIG.
The electrophoretic display device 20 of Example 10 is different from Example 5 only in that a transparent substrate 131 is provided instead of the transparent substrate 31 of Example 5.

図１０（ａ）に示すように、透明電極層３２を有する透明基板１３１の端部下側はスカート部４３５を備えている。電気泳動表示シート３０を駆動基板４０へ貼り付ける際には、加工部材５により矢印Ａに示す圧力が透明基板３１の端部にかかる。この圧力は、スカート部４３５を通じて矢印Ｂのように分散される。
図１０（ｂ）に示すように、電気泳動表示シート３０が駆動基板４０へ貼り付けられた際には、スカート部４３５が駆動基板４０の上面に当接する。透明基板１３１は可撓性であるので、当接部においてスカート部の一部又は全部が駆動基板４０の端部上面と面接触する。 As shown in FIG. 10A, the lower side of the end portion of the transparent substrate 131 having the transparent electrode layer 32 is provided with a skirt portion 435. When the electrophoretic display sheet 30 is attached to the drive substrate 40, the pressure indicated by the arrow A is applied to the end of the transparent substrate 31 by the processing member 5. This pressure is distributed as shown by arrow B through the skirt portion 435.
As shown in FIG. 10B, when the electrophoretic display sheet 30 is attached to the drive substrate 40, the skirt portion 435 contacts the upper surface of the drive substrate 40. Since the transparent substrate 131 is flexible, part or all of the skirt portion is in surface contact with the upper surface of the end portion of the drive substrate 40 at the contact portion.

本実施例１０においても、透明基板１３１の下側端部が駆動基板４０に面接触するので、電気泳動表示シート３０が駆動基板４０に貼り合わされる際に駆動基板４０にかかる応力を緩和することができ、駆動回路の破損を防止することができる。   Also in the tenth embodiment, since the lower end portion of the transparent substrate 131 is in surface contact with the drive substrate 40, the stress applied to the drive substrate 40 when the electrophoretic display sheet 30 is bonded to the drive substrate 40 is reduced. And damage to the drive circuit can be prevented.

（電子機器）
本発明の電子機器は、上述した電気泳動表示装置を備える。ここで、「電子機器」は、電気泳動材料による表示を利用する表示部を備えるあらゆる機器を含むもので、ディスプレイ装置、テレビジョン装置、電子ブック、電子ペーパ、腕時計、電子手帳、電卓、携帯電話、携帯情報端末等を含む。また、「機器」という概念からはずれるもの、例えば可撓性のある紙状／フィルム状の物体、これら物体が貼り付けられた壁面等の不動産に属するもの、車両、飛行体、船舶等の移動体に属するものも含む。 (Electronics)
An electronic apparatus of the present invention includes the above-described electrophoretic display device. Here, the “electronic device” includes any device including a display unit that uses display by an electrophoretic material, and includes a display device, a television device, an electronic book, an electronic paper, a wristwatch, an electronic notebook, a calculator, and a mobile phone. Mobile information terminals and the like. Also, things that deviate from the concept of “equipment”, for example, flexible paper / film-like objects, belonging to real estate such as wall surfaces to which these objects are attached, moving objects such as vehicles, flying objects, ships, etc. Including those belonging to.

図１は実施例１に係る電気泳動表示装置１０の一部断面図である。FIG. 1 is a partial cross-sectional view of an electrophoretic display device 10 according to the first embodiment. 図２は実施例１に係る電気泳動表示装置１０を上方から見た図である。FIG. 2 is a diagram of the electrophoretic display device 10 according to the first embodiment viewed from above. 図３は実施例２に係る電気泳動表示装置１１の一部断面図である。FIG. 3 is a partial cross-sectional view of the electrophoretic display device 11 according to the second embodiment. 図４（ａ）は実施例３に係る電気泳動表示装置１２の一部断面図であり、図４（ｂ）は組み立て前において保護シート３９、フレキシブル配線基板６２、及び異方導電性シート６３が一体化された状態を示す図である。FIG. 4A is a partial cross-sectional view of the electrophoretic display device 12 according to the third embodiment. FIG. 4B shows the protective sheet 39, the flexible wiring board 62, and the anisotropic conductive sheet 63 before assembly. It is a figure which shows the state integrated. 図３は実施例３に係る電気泳動表示装置１２を上方から見た図である。FIG. 3 is a diagram of the electrophoretic display device 12 according to the third embodiment as viewed from above. 図６（ａ）は実施例４に係る電気泳動表示装置１３の一部断面図であり、図６（ｂ）は組み立て前において保護シート１３９、フレキシブル配線基板６２、及び異方導電性シート６３が一体化された状態を示す図である。FIG. 6A is a partial cross-sectional view of the electrophoretic display device 13 according to the fourth embodiment. FIG. 6B shows the protective sheet 139, the flexible wiring board 62, and the anisotropic conductive sheet 63 before assembly. It is a figure which shows the state integrated. 図７は実施例５に係る電気泳動表示装置１０’の一部断面図である。FIG. 7 is a partial cross-sectional view of the electrophoretic display device 10 ′ according to the fifth embodiment. 図８は実施例６に係る電気泳動表示装置１１’の一部断面図である。FIG. 8 is a partial cross-sectional view of the electrophoretic display device 11 ′ according to the sixth embodiment. 図９は実施例７〜９に用いられる透明基板の端部を示す図である。FIG. 9 is a view showing an end portion of a transparent substrate used in Examples 7 to 9. 図１０（ａ）は実施例１０’に用いられる透明基板１３１の端部を示す図であり、図１０（ｂ）は電気泳動表示装置２０の一部断面図である。FIG. 10A is a diagram illustrating an end portion of the transparent substrate 131 used in Example 10 ′, and FIG. 10B is a partial cross-sectional view of the electrophoretic display device 20.

符号の説明Explanation of symbols

１０、１１、１２、１３、１０’、１１’、２０ 電気泳動表示装置、３０ 電気泳動表示シート、３３ 電気泳動表示層、３２ 透明電極層、３１、１３５、２３５、３３５、１３１ 透明基板、４０ 駆動基板、４４ 背面基板、４３ 半導体回路層、４２ ゲート線層、４１ 保護層、５２ 画素電極、５３ データ線、５１ 有機半導体、５４ 薄膜トランジスタ、６１ 外部接続端子、６３ 異方導電性シート、６２ フレキシブル配線基板、３５ 延出部、３７ 緩衝部、３９、１３９、７１ 保護シート、４３５ スカート部、３５’端部 10, 11, 12, 13, 10 ′, 11 ′, 20 Electrophoretic display device, 30 Electrophoretic display sheet, 33 Electrophoretic display layer, 32 Transparent electrode layer, 31, 135, 235, 335, 131 Transparent substrate, 40 Drive substrate, 44 Back substrate, 43 Semiconductor circuit layer, 42 Gate line layer, 41 Protective layer, 52 Pixel electrode, 53 Data line, 51 Organic semiconductor, 54 Thin film transistor, 61 External connection terminal, 63 Anisotropic conductive sheet, 62 Flexible Wiring board, 35 extension part, 37 buffer part, 39, 139, 71 protective sheet, 435 skirt part, 35 'end

Claims (12)

半導体回路層が設けられた駆動基板の上に積層される電気泳動表示層と、
前記電気泳動表示層の上に積層され、透明電極層を有する透明基板と、を少なくとも含む電気泳動表示シートであって、
該電気泳動表示シートが駆動基板に貼り合わされる際に駆動基板にかかる応力を緩和する応力緩和手段を含む、電気泳動表示シート。 An electrophoretic display layer laminated on a driving substrate provided with a semiconductor circuit layer;
An electrophoretic display sheet comprising at least a transparent substrate having a transparent electrode layer laminated on the electrophoretic display layer,
An electrophoretic display sheet comprising stress relieving means for relieving stress applied to the drive substrate when the electrophoretic display sheet is bonded to the drive substrate. 前記応力緩和手段は、前記透明基板の端部が駆動基板の外延よりも延出する延出部であって、該延出部が駆動基板が備えるフレキシブル配線基板の上面の一部又は全部に当接するものである、請求項１記載の電気泳動表示シート。   The stress relieving means is an extending portion in which an end portion of the transparent substrate extends beyond an extension of the driving substrate, and the extending portion corresponds to a part or all of the upper surface of the flexible wiring board included in the driving substrate. The electrophoretic display sheet according to claim 1, which is in contact with the electrophoretic display sheet. 前記応力緩和手段は、前記透明基板の端部下側に駆動基板に対向して配置された緩衝部である、請求項１記載の電気泳動表示シート。   The electrophoretic display sheet according to claim 1, wherein the stress relieving means is a buffering portion disposed below the end portion of the transparent substrate so as to face the driving substrate. 前記応力緩和手段は、前記透明基板の端部下側に配置された保護シートであり、該保護シートは駆動基板が備えるフレキシブル配線基板上に予め一体化されたものである、請求項１記載の電気泳動表示シート。   The electricity according to claim 1, wherein the stress relaxation means is a protective sheet disposed below an end portion of the transparent substrate, and the protective sheet is preliminarily integrated on a flexible wiring substrate included in the drive substrate. Electrophoresis display sheet. 前記透明基板は、可撓性であり、
前記応力緩和手段は、前記透明基板の端部下側における、該電気泳動表示シートが駆動基板に貼り合わされる際に駆動基板と面接触する面接触手段である、請求項１記載の電気泳動表示シート。 The transparent substrate is flexible;
2. The electrophoretic display sheet according to claim 1, wherein the stress relaxation unit is a surface contact unit that is in surface contact with the drive substrate when the electrophoretic display sheet is bonded to the drive substrate, below the end of the transparent substrate. . 前記面接触手段は、前記透明基板の端部下側が面取りされた曲面である、請求項５記載の電気泳動表示シート。   The electrophoretic display sheet according to claim 5, wherein the surface contact means is a curved surface in which a lower side of the end portion of the transparent substrate is chamfered. 前記曲面は、曲率Ｒが前記透明基板の厚さの１／１０以上である、請求項６記載の電気泳動表示シート。   The electrophoretic display sheet according to claim 6, wherein the curved surface has a curvature R that is 1/10 or more of a thickness of the transparent substrate. 前記曲面をなす部位が弾性部材で構成されてなる、請求項６又は７記載の電気泳動表示シート。   The electrophoretic display sheet according to claim 6 or 7, wherein the curved portion is made of an elastic member. 前記面接触手段は、前記透明基板の端部下側に設けられたスカート部である、請求項５記載の電気泳動表示シート。   The electrophoretic display sheet according to claim 5, wherein the surface contact means is a skirt provided below the end of the transparent substrate. 請求項１〜９の何れか１項に記載の電気泳動表示シートと、
半導体回路層及びフレキシブル配線基板を備えた駆動基板と、
を少なくとも含む、電気泳動表示装置。 The electrophoretic display sheet according to any one of claims 1 to 9,
A drive board comprising a semiconductor circuit layer and a flexible wiring board;
An electrophoretic display device comprising at least 請求項５〜９の何れか１項に記載の電気泳動表示シートと、
半導体回路層及びフレキシブル配線基板を備えた駆動基板と、
を少なくとも含む、電気泳動表示装置であって、
前記透明基板の端部上側であって、前記駆動基板と面接触する部位に、保護シートが設けられた、電気泳動表示装置。 The electrophoretic display sheet according to any one of claims 5 to 9,
A drive board comprising a semiconductor circuit layer and a flexible wiring board;
An electrophoretic display device comprising at least
An electrophoretic display device, wherein a protective sheet is provided on a portion of the transparent substrate that is in an upper side portion of the transparent substrate and in surface contact with the driving substrate. 請求項１０又は１１記載の電気泳動表示装置を備えた、電子機器。   An electronic apparatus comprising the electrophoretic display device according to claim 10.
JP2006354016A 2006-01-23 2006-12-28 Electrophoretic display sheet, electrophoretic display device, and electronic apparatus Expired - Fee Related JP5382395B2 (en)

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KR101253110B1 (en) 2013-04-10
JP5382395B2 (en) 2014-01-08

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