JP6026798B2 - LCD device - Google Patents

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JP6026798B2
JP6026798B2 JP2012153090A JP2012153090A JP6026798B2 JP 6026798 B2 JP6026798 B2 JP 6026798B2 JP 2012153090 A JP2012153090 A JP 2012153090A JP 2012153090 A JP2012153090 A JP 2012153090A JP 6026798 B2 JP6026798 B2 JP 6026798B2
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resin
protective
liquid crystal
crystal display
protective resin
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JP2014016435A (en
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大石　正樹
正樹 大石
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Citizen Watch Co Ltd
Citizen Fine Device Co Ltd
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Citizen Watch Co Ltd
Citizen Fine Device Co Ltd
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本発明は、液晶表示デバイスに関するものである。   The present invention relates to a liquid crystal display device.

液晶表示素子を回路基板に固定し、液晶表示素子上の電極と回路基板上の電極とをワイヤーにより接続した後、ワイヤーを保護するためにワイヤー周辺に保護樹脂を塗布することが一般的に行われている。   In general, a liquid crystal display element is fixed to a circuit board, and an electrode on the liquid crystal display element and an electrode on the circuit board are connected by a wire, and then a protective resin is applied around the wire to protect the wire. It has been broken.

保護樹脂には例えば熱硬化型樹脂を使用し、特に熱硬化後にワイヤーへのストレス（応力）を低減するためには粘度の低い樹脂を使用することが好ましいが、粘度の低い樹脂は塗布後熱硬化するまでに周囲に広がりやすいため、樹脂の流れを防止するためにワイヤーの周囲にダムを形成することがある。（例えば、特許文献１参照）   For example, a thermosetting resin is used as the protective resin, and in order to reduce stress on the wire after thermosetting, it is preferable to use a resin having a low viscosity. A dam may be formed around the wire in order to prevent the resin from flowing because it tends to spread to the surroundings until it cures. (For example, see Patent Document 1)

図２は従来技術による液晶表示デバイスを示す図で、（Ａ）は上面図、（Ｂ）はＡ−Ａ断面図である。従来技術による液晶表示デバイスでは、例えばガラス基板である第１基板１とシリコン基板である第２基板２とを互いに貼り合わせることで形成された隙間に液晶を封入して成る液晶表示素子３を回路基板４上に固定し、第２基板２の一端部に設けられた外部接続用の電極５と回路基板４上に設けられた電極６とをワイヤー７で接続した後、ワイヤー７の周囲に保護樹脂流れ防止樹脂８をディスペンサ等で塗布する。この時、ワイヤー７の周囲のうち３辺を高粘度の保護樹脂流れ防止樹脂８で囲い、残りの１辺を第１基板１の外周を利用して囲むことで、ワイヤー７の周囲にダムを形成する。次に、第１基板１と保護樹脂流れ防止樹脂８で囲まれた領域に低粘度の保護樹脂９を充填し、保護樹脂流れ防止樹脂８と保護樹脂９を同一キュア工程で硬化させる。低粘度の保護樹脂９は第１基板１と保護樹脂流れ防止樹脂８で囲まれているため、外部へ流れ出すことはない。   2A and 2B are diagrams showing a liquid crystal display device according to the prior art, in which FIG. 2A is a top view and FIG. 2B is a cross-sectional view taken along line AA. In a liquid crystal display device according to the prior art, for example, a liquid crystal display element 3 formed by sealing a liquid crystal in a gap formed by bonding together a first substrate 1 that is a glass substrate and a second substrate 2 that is a silicon substrate is a circuit. After fixing on the substrate 4, the external connection electrode 5 provided at one end of the second substrate 2 and the electrode 6 provided on the circuit substrate 4 are connected by the wire 7 and then protected around the wire 7. Resin flow prevention resin 8 is applied with a dispenser or the like. At this time, three sides of the periphery of the wire 7 are surrounded by the high-viscosity protective resin flow prevention resin 8, and the remaining one side is surrounded by using the outer periphery of the first substrate 1, so that a dam is formed around the wire 7. Form. Next, a low-viscosity protective resin 9 is filled in a region surrounded by the first substrate 1 and the protective resin flow prevention resin 8, and the protective resin flow prevention resin 8 and the protective resin 9 are cured in the same curing process. Since the low-viscosity protective resin 9 is surrounded by the first substrate 1 and the protective resin flow preventing resin 8, it does not flow out to the outside.

特開２００６−３０８８２２号公報JP 2006-308822 A

従来技術では、低粘度の保護樹脂を使用することにより保護樹脂の熱膨張・収縮によるワイヤーへの応力を軽減することは可能であるが、低粘度の保護樹脂は硬度が低いため、外的ストレスに対してはワイヤーの保護を十分に行えないという問題がある。   In the prior art, it is possible to reduce the stress on the wire due to thermal expansion and contraction of the protective resin by using a low-viscosity protective resin, but the low-viscosity protective resin has low hardness, so external stress However, there is a problem that the wire cannot be sufficiently protected.

本発明は、以上の問題点に鑑みたもので、ワイヤーの断線を防止することが可能な液晶表示デバイスを提供することを目的とする。   The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a liquid crystal display device capable of preventing wire breakage.

液晶表示素子を回路基板上に固定し、当該液晶表示素子上に設けられた外部接続用の電極と前記回路基板上に設けられた電極とをワイヤーで接続し、当該ワイヤーを保護樹脂で覆い、当該保護樹脂の周囲に保護樹脂流れ防止樹脂を設けた液晶表示デバイスにおいて、前記保護樹脂流れ防止樹脂を接着性を有する樹脂で構成し、前記保護樹脂の上部及び前記保護樹脂流れ防止樹脂の上部に平板状の保護プレートを配置し、当該保護プレートを前記保護樹脂流れ防止樹脂の接着力を用いて固定し、前記保護プレートの上面を前記液晶表示素子の上面を超えない高さに配置した液晶表示デバイスとする。
A liquid crystal display element is fixed on a circuit board, an electrode for external connection provided on the liquid crystal display element and an electrode provided on the circuit board are connected with a wire, and the wire is covered with a protective resin, In the liquid crystal display device in which a protective resin flow prevention resin is provided around the protective resin, the protective resin flow preventive resin is made of an adhesive resin, and is formed on the upper part of the protective resin and the upper part of the protective resin flow preventive resin. A flat protective plate is disposed, the protective plate is fixed using the adhesive force of the protective resin flow prevention resin, and the upper surface of the protective plate is disposed at a height not exceeding the upper surface of the liquid crystal display element. A display device.

前記保護プレートは、前記保護樹脂の上部及び保護樹脂流れ防止樹脂の上部のみに配置されている液晶表示デバイスとすることができる。
The protective plate may be a liquid crystal display device disposed only on the upper part of the protective resin and the upper part of the protective resin flow prevention resin .

本発明によれば、ワイヤーを覆う保護樹脂の上に平板状の保護プレートを配置することで保護強度が向上するため、外的ストレスによるワイヤーの断線を防止することができる。   According to the present invention, since the protective strength is improved by disposing a flat protective plate on the protective resin covering the wire, it is possible to prevent the wire from being disconnected due to external stress.

本発明による液晶表示デバイスの一実施例を示す図で、（Ａ）は上面図、（Ｂ）はＡ−Ａ断面図BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one Example of the liquid crystal display device by this invention, (A) is a top view, (B) is AA sectional drawing. 従来技術による液晶表示デバイスを示す図で、（Ａ）は上面図、（Ｂ）はＡ−Ａ断面図It is a figure which shows the liquid crystal display device by a prior art, (A) is a top view, (B) is AA sectional drawing.

図１は本発明による液晶表示デバイスの一実施例を示す図で、（Ａ）は上面図、（Ｂ）はＡ−Ａ断面図である。例えばガラス基板である第１基板１とシリコン基板である第２基板２とを互いに貼り合わせることで形成された隙間に液晶を封入してなる液晶表示素子３が、第２基板２側を下にして回路基板４上に固定されている。第２基板２の一端部は第１基板１の一端部よりも側方へ迫り出しており、その迫り出した部分に外部接続用の電極５が設けられている。電極５は回路基板４上に設けられた電極６とワイヤー７により接続され、ワイヤー７全体が保護樹脂９で覆われている。保護樹脂９には例えば低粘度の樹脂が使用され、その周囲のうち３辺が保護樹脂９よりも高粘度の保護樹脂流れ防止樹脂８で囲まれ、残りの１辺が第１基板１の外周部で囲まれている。保護樹脂９には例えばシリコン性２液混合タイプである信越化学工業社製ＫＥ−１２８３を使用することができ、保護樹脂流れ防止樹脂８には例えばＴｈｒｅｅＢｏｎｄ社製ＴＢ１２０６Ｃを使用することができる。   1A and 1B are views showing an embodiment of a liquid crystal display device according to the present invention, in which FIG. 1A is a top view and FIG. For example, a liquid crystal display element 3 in which liquid crystal is sealed in a gap formed by bonding together a first substrate 1 that is a glass substrate and a second substrate 2 that is a silicon substrate, has the second substrate 2 side down. It is fixed on the circuit board 4. One end portion of the second substrate 2 protrudes laterally from the one end portion of the first substrate 1, and an electrode 5 for external connection is provided at the protruding portion. The electrode 5 is connected to an electrode 6 provided on the circuit board 4 by a wire 7, and the entire wire 7 is covered with a protective resin 9. For example, a low-viscosity resin is used as the protective resin 9, three sides of the protective resin 9 are surrounded by a protective resin flow prevention resin 8 having a higher viscosity than the protective resin 9, and the remaining one side is the outer periphery of the first substrate 1. Surrounded by parts. For example, KE-1283 manufactured by Shin-Etsu Chemical Co., Ltd., which is a silicon two-liquid mixed type, can be used as the protective resin 9, and TB1206C manufactured by ThreeBond, for example, can be used as the protective resin flow prevention resin 8.

尚、保護樹脂９と保護樹脂流れ防止樹脂８に共にシリコン性の樹脂を用いた場合には、互いの相性により界面部分が硬化不良を引き起こす可能性が高いが、このような場合には、保護樹脂流れ防止樹脂８を完全に硬化させた後に保護樹脂９の塗布を行うのが好適である。   If both the protective resin 9 and the protective resin flow-preventing resin 8 are made of silicon resin, there is a high possibility that the interface portion will cause a curing failure due to the compatibility with each other. It is preferable to apply the protective resin 9 after the resin flow preventing resin 8 is completely cured.

保護樹脂９は硬化後の硬度が低く、それだけではワイヤー７を外的ストレスから十分に保護することができない。保護樹脂９の周囲は保護樹脂流れ防止樹脂８と第１基板１の外周部とにより囲まれているため外的ストレスに対する耐性はある程度確保されているが、外部へ露出された保護樹脂９の上部は外的ストレスに対する耐性が低くなっている。故に保護樹脂９の上部は外的ストレスに対する耐性を向上させる目的で平板状の保護プレート１０で覆われている。保護プレート１０は保護樹脂流れ防止樹脂８及び保護樹脂９の上部にそれらの接着性を利用して固定されている。保護プレート１０の固定は保護樹脂９及び保護樹脂流れ防止樹脂８の硬化と同時に行うことが可能である。保護プレート１０には樹脂プレート、金属プレート、ガラスプレートなどを使用することが可能であるが、熱膨張係数の観点からは、保護プレート１０は保護樹脂流れ防止樹脂８及び保護樹脂９と同様の樹脂製であるのが好適である。   The protective resin 9 has a low hardness after curing, and it cannot sufficiently protect the wire 7 from external stress. Since the periphery of the protective resin 9 is surrounded by the protective resin flow preventing resin 8 and the outer peripheral portion of the first substrate 1, a certain degree of resistance to external stress is secured, but the upper portion of the protective resin 9 exposed to the outside Is less resistant to external stress. Therefore, the upper portion of the protective resin 9 is covered with a flat protective plate 10 for the purpose of improving resistance to external stress. The protective plate 10 is fixed to the upper part of the protective resin flow prevention resin 8 and the protective resin 9 by using their adhesiveness. The protection plate 10 can be fixed simultaneously with the curing of the protection resin 9 and the protection resin flow prevention resin 8. A resin plate, a metal plate, a glass plate, or the like can be used as the protection plate 10. From the viewpoint of the thermal expansion coefficient, the protection plate 10 is a resin similar to the protection resin flow prevention resin 8 and the protection resin 9. Preferably it is made of.

本実施例では保護樹脂９を保護プレート１０で覆っているため、外的ストレスに対する耐性が向上し、ワイヤー７の断線をより確実に防止することが可能である。   In this embodiment, since the protective resin 9 is covered with the protective plate 10, resistance to external stress is improved, and disconnection of the wire 7 can be more reliably prevented.

また、保護プレート１０は平板状のものを保護樹脂９の上部に載置するだけでよいため、取り付けの作業性に優れており、更に、保護樹脂流れ防止樹脂８の周囲も保護プレート１０で覆う場合に比べて横方向への大型化を抑えることができる。   Further, since the protective plate 10 only needs to be placed on the upper part of the protective resin 9, the protective plate 10 is excellent in mounting workability, and the protective plate 10 also covers the periphery of the protective resin flow prevention resin 8. The enlargement in the lateral direction can be suppressed compared to the case.

保護プレート１０は保護樹脂流れ防止樹脂８の上部には配置せず、それより内側の保護樹脂９の上部にのみ配置してもよい。しかし、保護プレート１０の配置の安定性からは、保護樹脂９より高粘度の保護樹脂流れ防止樹脂８の上部に配置するのが好適である。   The protective plate 10 may not be arranged on the upper part of the protective resin flow prevention resin 8 but may be arranged only on the upper part of the protective resin 9 inside. However, in view of the stability of the arrangement of the protective plate 10, it is preferable to arrange the protective plate 10 on the upper part of the protective resin flow preventing resin 8 having a higher viscosity than the protective resin 9.

保護プレート１０は保護樹脂９の上部を全て覆っているのが好ましいが、一部を覆っているだけでもよい。   The protective plate 10 preferably covers the entire upper portion of the protective resin 9, but may cover only a part.

保護樹脂９の周囲はその任意の辺を選択的に保護樹脂流れ防止樹脂８で囲むことが可能であり、保護樹脂９の外部への流出が問題とならないのであれば、保護樹脂流れ防止樹脂８は省略することも可能である。尚、保護樹脂流れ防止樹脂８の上部に保護プレート１０を配置する場合には、保護プレート１０の配置の安定性を考え、保護樹脂９の周囲の２辺以上を保護樹脂流れ防止樹脂８で囲むのが好適である。   An arbitrary side of the protective resin 9 can be selectively surrounded by the protective resin flow prevention resin 8. If the outflow of the protective resin 9 is not a problem, the protective resin flow prevention resin 8 Can be omitted. When the protective plate 10 is disposed above the protective resin flow prevention resin 8, two or more sides around the protective resin 9 are surrounded by the protective resin flow prevention resin 8 in consideration of the stability of the arrangement of the protective plate 10. Is preferred.

また、画像の視認側となる第１基板１の主面上に画像表示領域を規定するための見切り部材を配置する場合には、見切り部材の一端部を保護樹脂９の上方へ拡張するなどして保護プレート１０として利用することも可能である。この場合には、保護プレート１０を別体で設ける場合に比べて部品点数と取り付けの工数を削減することができる。   Further, when a parting member for defining the image display area is disposed on the main surface of the first substrate 1 on the image viewing side, one end of the parting member is extended above the protective resin 9. It can also be used as the protective plate 10. In this case, the number of parts and the number of mounting steps can be reduced as compared with the case where the protective plate 10 is provided separately.

１ 第１基板
２ 第２基板
３ 液晶表示素子
４ 回路基板
５ 液晶表示素子上の電極
６ 回路基板上の電極
７ ワイヤー
８ 保護樹脂流れ防止樹脂
９ 保護樹脂
１０ 保護プレート DESCRIPTION OF SYMBOLS 1 1st board | substrate 2 2nd board | substrate 3 Liquid crystal display element 4 Circuit board 5 Electrode on a liquid crystal display element 6 Electrode on a circuit board 7 Wire 8 Protection resin flow prevention resin 9 Protection resin 10 Protection plate

Claims (2)

液晶表示素子を回路基板上に固定し、当該液晶表示素子上に設けられた外部接続用の電極と前記回路基板上に設けられた電極とをワイヤーで接続し、当該ワイヤーを保護樹脂で覆い、当該保護樹脂の周囲に保護樹脂流れ防止樹脂を設けた液晶表示デバイスにおいて、
前記保護樹脂流れ防止樹脂を接着性を有する樹脂で構成し、前記保護樹脂の上部及び前記保護樹脂流れ防止樹脂の上部に平板状の保護プレートを配置し、当該保護プレートを前記保護樹脂流れ防止樹脂の接着力を用いて固定し、前記保護プレートの上面を前記液晶表示素子の上面を超えない高さに配置したことを特徴とする液晶表示デバイス。 A liquid crystal display element is fixed on a circuit board, an electrode for external connection provided on the liquid crystal display element and an electrode provided on the circuit board are connected with a wire, and the wire is covered with a protective resin, In a liquid crystal display device provided with a protective resin flow prevention resin around the protective resin,
The protective resin flow preventive resin is made of an adhesive resin, a flat protective plate is disposed on the protective resin and on the protective resin flow preventive resin, and the protective plate is attached to the protective resin flow preventive resin. A liquid crystal display device, wherein the upper surface of the protective plate is disposed at a height not exceeding the upper surface of the liquid crystal display element . 前記保護プレートは、前記保護樹脂の上部及び保護樹脂流れ防止樹脂の上部のみに配置されていることを特徴とする請求項１に記載の液晶表示デバイス。
The liquid crystal display device according to claim 1, wherein the protective plate is disposed only on the upper part of the protective resin and the upper part of the protective resin flow prevention resin.
JP2012153090A 2012-07-06 2012-07-06 LCD device Active JP6026798B2 (en)

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