JP4861548B2 - Flexible circuit board mounting structure of liquid crystal display panel - Google Patents

Flexible circuit board mounting structure of liquid crystal display panel Download PDF

Info

Publication number
JP4861548B2
JP4861548B2 JP2000300308A JP2000300308A JP4861548B2 JP 4861548 B2 JP4861548 B2 JP 4861548B2 JP 2000300308 A JP2000300308 A JP 2000300308A JP 2000300308 A JP2000300308 A JP 2000300308A JP 4861548 B2 JP4861548 B2 JP 4861548B2
Authority
JP
Japan
Prior art keywords
liquid crystal
circuit board
electrode terminal
flexible circuit
crystal display
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2000300308A
Other languages
Japanese (ja)
Other versions
JP2002107754A (en
Inventor
雅仁 中山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Display Corp
Original Assignee
Kyocera Display Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyocera Display Corp filed Critical Kyocera Display Corp
Priority to JP2000300308A priority Critical patent/JP4861548B2/en
Publication of JP2002107754A publication Critical patent/JP2002107754A/en
Application granted granted Critical
Publication of JP4861548B2 publication Critical patent/JP4861548B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Non-Metallic Protective Coatings For Printed Circuits (AREA)
  • Combinations Of Printed Boards (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、液晶表示パネルのフレキシブル回路基板実装構造に係り、特に、液晶表示パネル上に液晶駆動用ドライバICを直接実装したチップ・オン・ガラス(COG)実装に好適な液晶表示パネルのフレキシブル回路基板実装構造に関する。
【0002】
【従来の技術】
従来から、文字や図形などの各種の画像を表示する表示装置の一種として、液晶表示装置が知られており、このような液晶表示装置の表示部として一対の透明基板の間に液晶が密封された液晶表示パネルが用いられている。
【0003】
図3および図4はCOG実装された従来の液晶表示パネルの要部を示すものであり、従来の液晶表示パネル1においては、例えば、ガラスなどからなる一対の基板2をそれぞれ対向して配置し、これら各基板2の互いに対向する面には、酸化インジウム錫(以下、ITOという)などからなる透明電極3が積層形成されている。そして、透明電極3が形成された基板2の表面には、互いに対向する透明電極3の間で液晶分子を一定の形態に配列させるために表面にラビング処理が施されたポリイミドなどの高分子材料からなる配向膜(図示せず)が積層形成されている。このような配向処理が施された2枚の基板2は、相互間の間隔が図示しないスペーサによって数μm程度に保持されている。また、2枚の基板2は、接着材を兼ねたシール材4によって貼り合わされており、予め設けられた図示しない注入口から液晶が注入され、その後注入口を封止することで、2枚の基板2の間に液晶が密封されている。
【0004】
また、COG実装された従来の液晶表示パネル1の電極端子構造においては、例えば、一対の基板2の間に液晶を注入、封止してなる一対の基板2のうちの図3下方に示す一方の基板2は、図3上方に示す他方の基板2に対して大きく形成されており、この大きく形成された一方の基板2の突出部分の他方の基板2側の表面は、電極端子形成部2aとされている。この電極端子形成部2aには、液晶駆動用ドライバIC(駆動回路)5が実装されており、この液晶駆動用ドライバIC5の出力側のIC電極5aは、液晶表示部6に位置する表示用電極としての透明電極3から引き出された所定パターンの多数の出力配線7と電気的に接続されている。また、液晶駆動用ドライバIC5の入力側(図3左側)のIC電極端子5bには、所定パターンの多数の入力配線8とこれに連なる外部接続用端子9が形成されており、液晶駆動用ドライバIC5の入力側のIC電極端子5bは、入力配線8と電気的に接続されている。
【0005】
前記出力配線7、入力配線8および外部接続端子9により、パネル電極端子10が形成されている。
【0006】
これらのパネル電極端子10は、基板2上に形成したITO膜をパターニングして透明電極3を形成する際に、基板2の電極端子形成部2aに位置するITO膜をパネル電極端子10の形状にパターニングすることで形成されている。すなわち、パネル電極端子10は、透明電極3と同一厚さのITO膜により、透明電極3の形成と同時に設けられている。なお、パネル電極端子10としては、電極端子形成部2aにバス配線および電源配線を配置する構成もある。
【0007】
そして、外部接続端子9には、フレキシブル回路基板11の接続端子11aが、異方性導電膜などの接合部材12を介して接続されるようになっている。そして、フレキシブル回路基板11から送られる信号および電力は、入力配線8を介して液晶駆動用ドライバIC5に入力され、この液晶駆動用ドライバIC5からの信号を入力配線7を介して液晶表示部6に送ることにより、所望の画像の表示を行なうことができるようになっている。
【0008】
また、少なくともパネル電極端子10とIC電極端子5a,5bとの接続部位は、図3に示すように、シリコーンレジン13によりモールドされており、接合部に働く収縮力に対し柔軟な構造を取ることにより安定性を確保している。このシリコーンレジン13は、未硬化状態において流動性を具備する液状に形成されており、塗布した後、加熱することなどにより硬化(固化)される。なお、シリコーンレジン13は、液晶駆動用ドライバIC5の固定と保護のため、液晶駆動用ドライバIC5を覆うように塗布されている。
【0009】
【発明が解決しようとする課題】
しかしながら、前述した従来の液晶表示パネル1においては、シリコーンレジン13の粘度が低く流動性に富むため、図3に示すように、シリコーンレジン13が外部接続端子9とフレキシブル回路基板11の接続端子11aとの接続部位にも接触した状態となる。そして、シリコーンレジン13には、硬化した後もモノマーやオリゴマーなどの重合度の低い低分子量分のシリコーンオイルが含有されており、このシリコーンオイルは僅かな隙間に対して浸透する性質をもつため、外部接続端子9と接続端子11aとの接続部位に接触しているシリコーンレジン13からシリコーンオイルが、外部接続端子9と接合部材12との界面、および、接合部材12と接続端子11aとの界面とに浸透し、その結果、接合部材12を介した外部接続端子9と接続端子11aとの接合強度(剥離強度)が時間の経過とともに低下し、接合部位の剥離につながるという問題点があった。
【0010】
そこで、パネル電極端子とフレキシブル回路基板の接続端子との接合強度を長期間に亘り保持することのできる液晶表示パネルのフレキシブル回路基板実装構造が望まれている。
【0011】
本発明はこれらの点に鑑みてなされたものであり、パネル電極端子とフレキシブル回路基板の接続端子との接合強度を長期間に亘り保持することのできる液晶表示パネルのフレキシブル回路基板実装構造を提供することを目的としている。
【0012】
【課題を解決するための手段】
前述した目的を達成するため請求項1に係る本発明の液晶表示パネルのフレキシブル回路基板実装構造の特徴は、液晶表示パネルの基板に形成した所定パターンのパネル電極端子に液晶駆動用ドライバICのIC電極端子を電気的に接続するとともに、前記パネル電極端子のうちの前記液晶駆動用ドライバICの入力側に位置するパネル電極端子にフレキシブル回路基板の接続端子を電気的に接続し、少なくとも前記パネル電極端子と前記IC電極端子との接続部位をシリコーンレジンによりモールドしてなる液晶表示パネルのフレキシブル回路基板実装構造において、前記パネル電極端子と前記接続端子との接続部位が前記シリコーンレジンに接触するのを防止する堰が設けられており、前記堰が、前記パネル電極端子に前記接続端子を接続した後に、前記パネル電極端子と前記接続端子との接続部位の周辺で前記フレキシブル回路基板を囲むように覆って形成されており、前記シリコーンレジンによるモールドが、前記堰を形成した後に、前記パネル電極端子と前記IC電極端子との接続部位に前記シリコーンレジンを塗布することにより形成されている点にある。そして、このような構成を採用したことにより、堰は、シリコーンレジンがパネル電極端子と接続端子との接続部位に接触するのを防止することができる。したがって、シリコーンレジンに含有されるモノマーやオリゴマーなどの重合度の低い低分子量分のシリコーンオイルがパネル電極端子と接続端子との接続部位に接触することに起因して生じる接合部材を介した外部接続端子と接続端子との接合強度が時間の経過とともに低下するという不都合を確実に防止することができるため、パネル電極端子とフレキシブル回路基板の接続端子との接合強度を長期間に亘り保持することができる。
【0013】
また、請求項2に係る本発明の液晶表示パネルのフレキシブル回路基板実装構造の特徴は、請求項1において、堰が、紫外線硬化樹脂により形成されている点にある。そして、このような構成を採用したことにより、任意の位置に堰を容易に形成することができる。
【0014】
また、請求項3に係る本発明の液晶表示パネルのフレキシブル回路基板実装構造の特徴は、請求項2において、紫外線硬化樹脂が、ディスペンサを用いて塗工されている点にある。
【0015】
【発明の実施の形態】
以下、本発明を図面に示す実施形態により説明する。なお、前述した従来のものと同一ないし相当する構成については図面中に同一の符号を付す。
【0016】
図1および図2は本発明に係る液晶表示パネルのフレキシブル回路基板実装構造の要部を示すものであり、図1は断面図、図2は平面図である。
【0017】
図1および図2に示すように、本実施形態の液晶表示パネルのフレキシブル回路基板実装構造20において、図1下方に示す基板2のパネル電極端子形成部2a上には、液晶駆動用ドライバIC5が実装されている。この液晶駆動用ドライバIC5の出力側のIC電極5aは、液晶表示部6に位置する表示用電極としての透明電極3から引き出された所定パターンの多数の出力配線7と電気的に接続されている。また、液晶駆動用ドライバIC5の入力側には、所定パターンの多数の入力配線8とこれに連なる外部接続用端子9が形成されており、液晶駆動用ドライバIC5の入力側のIC電極端子5bは、入力配線8と電気的に接続されている。
【0018】
前記出力配線7、入力配線8および外部接続端子9により、パネル電極端子10が形成されている。
【0019】
前記外部接続端子9には、フレキシブル回路基板11の接続端子11aが異方性導電膜などの接合部材12を介して接続されている。また、パネル電極端子10と接続端子11aとの接続部位の周辺には、接触防止手段としての紫外線硬化樹脂により形成された堰21が形成されている。この堰13は、液晶駆動用ドライバIC5の固定と保護のため、液晶駆動用ドライバIC5を覆うように塗布されるシリコーンレジン13が乗り越えない高さに形成することが肝要である。
【0020】
前記堰21は、シリコーンレジン13を塗布する前(パネル電極10に液晶駆動用ドライバIC5およびフレキシブル回路基板11を接続した後)に形成する形成方法が用いられている。
【0021】
また、本実施形態の堰21は、紫外線硬化樹脂としての紫外線硬化型アクリル樹脂をディスペンサを用いてパネル電極端子10と接続端子11aとの接続部位の周辺に幅1mm程度に塗工し、その後、高圧水銀灯を用いた紫外線照射を行って紫外線硬化型アクリル樹脂を固化することにより形成されている。
【0022】
その他の構成は従来と同様とされているので、その詳しい説明は省略する。
【0023】
つぎに、前述した構成からなる本実施形態の作用について説明する。
【0024】
本実施形態の液晶表示パネルのフレキシブル回路基板実装構造20によれば、接触防止手段としての堰21は、シリコーンレジン13を液晶駆動用ドライバIC5を覆うように塗布した際に、流動性を有するシリコーンレジン13がパネル電極端子10の一部を構成する外部接続端子9とフレキシブル回路基板11の接続端子11aとの接続部位に接触するのを防止することができる。
【0025】
したがって、本実施形態の液晶表示パネルのフレキシブル回路基板実装構造20の堰21によれば、シリコーンレジン13に含有されるモノマーやオリゴマーなどの重合度の低い低分子量分のシリコーンオイルがパネル電極端子10と接続端子11aとの接続部位に接触することに起因して生じる接合部材12を介した外部接続端子9と接続端子11aとの接合強度が時間の経過とともに低下するという不都合を確実に防止することができるため、パネル電極端子10とフレキシブル回路基板11の接続端子11aとの接合強度を長期間に亘り容易かつ確実に保持することができる。
【0026】
このことは、本実施形態の堰21を設けたパネル電極端子10と接続端子11aとの接続部位の接合強度としての剥離強度が、初期値に対して室温にて1000時間放置した後に20%程度の低下にとどまるのに対し、従来のシリコーンレジン13がパネル電極端子10と接続端子11aとの接続部位に接触した堰21を設けない構成の場合には、初期値に対して室温にて1000時間放置した後に50%程度に半減するという比較実験結果により確認することができた。
【0027】
また、本実施形態の接触防止手段としての堰21は、紫外線硬化樹脂により形成されており、未硬化の紫外線硬化樹脂を所定の位置に塗工した後に、紫外線を照射することで紫外線硬化樹脂を硬化(固化)させることができるので、任意の位置に堰21を容易に形成することができる。
【0028】
なお、本発明は前記実施形態に限定されるものではなく、必要に応じて種々変更することができる。
【0029】
以上説明したように請求項1に係る本発明の液晶表示パネルのフレキシブル回路基板実装構造によれば、は、シリコーンレジンがパネル電極端子と接続端子との接続部位に接触するのを防止することができるなどの極めて優れた効果を奏する。したがって、シリコーンレジンに含有されるモノマーやオリゴマーなどの重合度の低い低分子量分のシリコーンオイルがパネル電極端子と接続端子との接続部位に接触することに起因して生じる接合部材を介した外部接続端子と接続端子との接合強度が時間の経過とともに低下するという不都合を確実に防止することができるため、パネル電極端子とフレキシブル回路基板の接続端子との接合強度を長期間に亘り保持することができるなどの極めて優れた効果を奏する。
【0030】
また、請求項2に係る本発明の液晶表示パネルのフレキシブル回路基板実装構造によれば、任意の位置に堰を容易に形成することができるなどの極めて優れた効果を奏する。
【図面の簡単な説明】
【図1】 本発明に係る液晶表示パネルのフレキシブル回路基板実装構造の要部の構成を示す断面図
【図2】 本発明に係る液晶表示パネルのフレキシブル回路基板実装構造の要部の構成を示す平面図
【図3】 従来の液晶表示パネルのフレキシブル回路基板実装構造の要部の構成を示す断面図
【図4】 従来の液晶表示パネルのフレキシブル回路基板実装構造の要部の構成を示す平面図
【符号の説明】
2 基板
2a パネル電極端子形成部
3 透明電極
5 液晶駆動用ドライバIC
6 液晶表示部
10 パネル電極端子
11 フレキシブル回路基板
11a (フレキシブル回路基板の)接続端子
12 接合部材
13 シリコーンレジン
20 パネル電極端子構造
21 (接触防止手段としての)堰
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flexible circuit board mounting structure for a liquid crystal display panel, and in particular, a flexible circuit for a liquid crystal display panel suitable for chip-on-glass (COG) mounting in which a liquid crystal driving driver IC is directly mounted on the liquid crystal display panel. The present invention relates to a substrate mounting structure.
[0002]
[Prior art]
Conventionally, a liquid crystal display device is known as a kind of display device that displays various images such as characters and figures, and a liquid crystal is sealed between a pair of transparent substrates as a display unit of such a liquid crystal display device. A liquid crystal display panel is used.
[0003]
3 and 4 show the main part of a conventional liquid crystal display panel mounted with COG. In the conventional liquid crystal display panel 1, for example, a pair of substrates 2 made of glass or the like are arranged facing each other. A transparent electrode 3 made of indium tin oxide (hereinafter referred to as ITO) is laminated on the surfaces of the substrates 2 facing each other. Further, on the surface of the substrate 2 on which the transparent electrode 3 is formed, a polymer material such as polyimide whose surface is rubbed in order to arrange liquid crystal molecules in a certain form between the transparent electrodes 3 facing each other. An alignment film (not shown) made of is laminated. The two substrates 2 subjected to such an alignment treatment are held at a distance of about several μm by a spacer (not shown). Further, the two substrates 2 are bonded together by a sealing material 4 that also serves as an adhesive, and liquid crystal is injected from an injection port (not shown) provided in advance, and then the injection port is sealed, whereby two sheets are sealed. A liquid crystal is sealed between the substrates 2.
[0004]
In addition, in the electrode terminal structure of the conventional liquid crystal display panel 1 mounted with COG, for example, one of the pair of substrates 2 formed by injecting and sealing a liquid crystal between the pair of substrates 2 is shown below in FIG. The substrate 2 is formed larger than the other substrate 2 shown in the upper part of FIG. 3, and the surface of the projecting portion of the one substrate 2 formed on the other substrate 2 side is the electrode terminal forming portion 2a. It is said that. A liquid crystal driving driver IC (driving circuit) 5 is mounted on the electrode terminal forming portion 2 a, and the output-side IC electrode 5 a of the liquid crystal driving driver IC 5 is a display electrode located in the liquid crystal display portion 6. Are electrically connected to a number of output wirings 7 in a predetermined pattern drawn from the transparent electrode 3. The input electrode IC 5b on the input side (left side in FIG. 3) of the liquid crystal drive driver IC 5 is provided with a large number of input wirings 8 in a predetermined pattern and external connection terminals 9 connected to the input wirings 8. The IC electrode terminal 5 b on the input side of the IC 5 is electrically connected to the input wiring 8.
[0005]
A panel electrode terminal 10 is formed by the output wiring 7, the input wiring 8 and the external connection terminal 9.
[0006]
When these panel electrode terminals 10 form the transparent electrode 3 by patterning the ITO film formed on the substrate 2, the ITO film located on the electrode terminal forming portion 2 a of the substrate 2 is formed into the shape of the panel electrode terminal 10. It is formed by patterning. That is, the panel electrode terminal 10 is provided simultaneously with the formation of the transparent electrode 3 by an ITO film having the same thickness as the transparent electrode 3. In addition, as the panel electrode terminal 10, there also exists a structure which arrange | positions a bus wiring and a power supply wiring in the electrode terminal formation part 2a.
[0007]
And the connection terminal 11a of the flexible circuit board 11 is connected to the external connection terminal 9 via the joining member 12, such as an anisotropic conductive film. The signal and power sent from the flexible circuit board 11 are input to the liquid crystal driving driver IC 5 through the input wiring 8, and the signal from the liquid crystal driving driver IC 5 is input to the liquid crystal display unit 6 through the input wiring 7. By sending it, a desired image can be displayed.
[0008]
Further, at least the connection part between the panel electrode terminal 10 and the IC electrode terminals 5a and 5b is molded by the silicone resin 13 as shown in FIG. 3, and has a flexible structure against the contraction force acting on the joint. To ensure stability. The silicone resin 13 is formed in a liquid state having fluidity in an uncured state, and is cured (solidified) by heating after application. The silicone resin 13 is applied to cover the liquid crystal driving driver IC 5 in order to fix and protect the liquid crystal driving driver IC 5.
[0009]
[Problems to be solved by the invention]
However, in the conventional liquid crystal display panel 1 described above, since the viscosity of the silicone resin 13 is low and the fluidity is high, the silicone resin 13 is connected to the external connection terminals 9 and the connection terminals 11a of the flexible circuit board 11 as shown in FIG. It will be in the state which also contacted the connection part. The silicone resin 13 contains a low molecular weight silicone oil having a low degree of polymerization, such as a monomer or oligomer, even after curing, and this silicone oil has the property of penetrating into a slight gap. Silicone oil from the silicone resin 13 that is in contact with the connection site between the external connection terminal 9 and the connection terminal 11a, the interface between the external connection terminal 9 and the bonding member 12, and the interface between the bonding member 12 and the connection terminal 11a As a result, the bonding strength (peeling strength) between the external connection terminal 9 and the connection terminal 11a via the bonding member 12 decreases with the lapse of time, and there is a problem that the bonding site is peeled off.
[0010]
Therefore, there is a demand for a flexible circuit board mounting structure for a liquid crystal display panel that can maintain the bonding strength between the panel electrode terminals and the connection terminals of the flexible circuit board for a long period of time.
[0011]
The present invention has been made in view of these points, and provides a flexible circuit board mounting structure for a liquid crystal display panel capable of maintaining the bonding strength between a panel electrode terminal and a connection terminal of a flexible circuit board over a long period of time. The purpose is to do.
[0012]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the flexible circuit board mounting structure of the liquid crystal display panel according to the first aspect of the present invention is characterized in that the liquid crystal driving driver IC is connected to the panel electrode terminal of a predetermined pattern formed on the substrate of the liquid crystal display panel. An electrode terminal is electrically connected, and a connection terminal of a flexible circuit board is electrically connected to a panel electrode terminal located on an input side of the liquid crystal driving driver IC among the panel electrode terminals, and at least the panel electrode In a flexible circuit board mounting structure of a liquid crystal display panel formed by molding a connection part between a terminal and the IC electrode terminal with a silicone resin, the connection part between the panel electrode terminal and the connection terminal is in contact with the silicone resin. A dam is provided to prevent the dam from contacting the connection terminal to the panel electrode terminal. After, after the panel electrode terminal and is formed to cover so as to surround the flexible circuit board at the periphery of the connection portion between the connection terminal, the mold according to the silicone resin, the formation of the dam, the panel electrode The silicone resin is applied to the connection portion between the terminal and the IC electrode terminal. And by adopting such a configuration, the weir can prevent the silicone resin from coming into contact with the connection portion between the panel electrode terminal and the connection terminal. Therefore, low-molecular-weight silicone oil with a low degree of polymerization, such as monomers and oligomers contained in the silicone resin, comes into contact with the connection part between the panel electrode terminal and the connection terminal, resulting in an external connection via a joining member. Since it is possible to reliably prevent the disadvantage that the bonding strength between the terminal and the connection terminal decreases with time, the bonding strength between the panel electrode terminal and the connection terminal of the flexible circuit board can be maintained for a long period of time. it can.
[0013]
The flexible circuit board mounting structure of the liquid crystal display panel according to the second aspect of the present invention is characterized in that, in the first aspect, the weir is formed of an ultraviolet curable resin . And by adopting such a configuration, the weir can be easily formed at an arbitrary position.
[0014]
The flexible circuit board mounting structure of the liquid crystal display panel according to the third aspect of the present invention is characterized in that, in the second aspect, the ultraviolet curable resin is applied using a dispenser .
[0015]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings. In addition, the same code | symbol is attached | subjected in drawing about the structure which is the same as that of the conventional thing mentioned above, or is equivalent.
[0016]
FIG. 1 and FIG. 2 show the main part of a flexible circuit board mounting structure for a liquid crystal display panel according to the present invention. FIG. 1 is a sectional view and FIG. 2 is a plan view.
[0017]
As shown in FIGS. 1 and 2, in the flexible circuit board mounting structure 20 of the liquid crystal display panel of the present embodiment, a liquid crystal driving driver IC 5 is provided on the panel electrode terminal forming portion 2a of the substrate 2 shown in the lower part of FIG. Has been implemented. The IC electrode 5a on the output side of the driver IC 5 for driving the liquid crystal is electrically connected to a large number of output wirings 7 having a predetermined pattern drawn from the transparent electrode 3 serving as a display electrode located on the liquid crystal display unit 6. . Further, a large number of input wirings 8 having a predetermined pattern and external connection terminals 9 connected to the input wiring 8 are formed on the input side of the driver IC 5 for driving the liquid crystal, and the IC electrode terminal 5b on the input side of the driver IC 5 for driving the liquid crystal is The input wiring 8 is electrically connected.
[0018]
A panel electrode terminal 10 is formed by the output wiring 7, the input wiring 8 and the external connection terminal 9.
[0019]
A connection terminal 11a of a flexible circuit board 11 is connected to the external connection terminal 9 through a bonding member 12 such as an anisotropic conductive film. Further, a dam 21 made of an ultraviolet curable resin as a contact preventing means is formed around the connection portion between the panel electrode terminal 10 and the connection terminal 11a. In order to fix and protect the liquid crystal driving driver IC 5, it is important that the weir 13 be formed at a height that the silicone resin 13 applied so as to cover the liquid crystal driving driver IC 5 does not get over.
[0020]
A forming method is used in which the weir 21 is formed before the silicone resin 13 is applied (after the liquid crystal driving driver IC 5 and the flexible circuit board 11 are connected to the panel electrode 10).
[0021]
Further, the weir 21 of the present embodiment is coated with UV curable acrylic resin as UV curable resin to a width of about 1 mm around the connection portion between the panel electrode terminal 10 and the connection terminal 11a using a dispenser, It is formed by solidifying an ultraviolet curable acrylic resin by performing ultraviolet irradiation using a high-pressure mercury lamp.
[0022]
Since the other configuration is the same as that of the prior art, detailed description thereof is omitted.
[0023]
Next, the operation of the present embodiment having the above-described configuration will be described.
[0024]
According to the flexible circuit board mounting structure 20 of the liquid crystal display panel of the present embodiment, the weir 21 as the contact prevention means is fluid silicone when the silicone resin 13 is applied so as to cover the liquid crystal driving driver IC 5. It is possible to prevent the resin 13 from coming into contact with the connection portion between the external connection terminal 9 constituting a part of the panel electrode terminal 10 and the connection terminal 11 a of the flexible circuit board 11.
[0025]
Therefore, according to the weir 21 of the flexible circuit board mounting structure 20 of the liquid crystal display panel of the present embodiment, the low molecular weight silicone oil such as a monomer or oligomer contained in the silicone resin 13 is transferred to the panel electrode terminal 10. To reliably prevent inconvenience that the bonding strength between the external connection terminal 9 and the connection terminal 11a via the bonding member 12 caused by coming into contact with the connection portion between the connection terminal 11a and the connection terminal 11a decreases with time. Therefore, the bonding strength between the panel electrode terminal 10 and the connection terminal 11a of the flexible circuit board 11 can be easily and reliably maintained over a long period of time.
[0026]
This means that the peel strength as the joint strength of the connection portion between the panel electrode terminal 10 provided with the weir 21 of this embodiment and the connection terminal 11a is about 20% after being left at room temperature for 1000 hours with respect to the initial value. In the case where the conventional silicone resin 13 is not provided with the weir 21 in contact with the connection portion between the panel electrode terminal 10 and the connection terminal 11a, the conventional silicone resin 13 is 1000 hours at room temperature with respect to the initial value. It could be confirmed by the result of a comparative experiment that it was reduced to about 50% after being left.
[0027]
Further, the weir 21 as the contact preventing means of the present embodiment is formed of an ultraviolet curable resin. After the uncured ultraviolet curable resin is applied to a predetermined position, the ultraviolet curable resin is irradiated by irradiating ultraviolet rays. Since it can be hardened (solidified), the weir 21 can be easily formed at an arbitrary position.
[0028]
In addition, this invention is not limited to the said embodiment, A various change can be made as needed.
[0029]
As described above, according to the flexible circuit board mounting structure of the liquid crystal display panel of the present invention according to claim 1, the weir prevents the silicone resin from coming into contact with the connection portion between the panel electrode terminal and the connection terminal. It produces extremely excellent effects such as Therefore, low-molecular-weight silicone oil with a low degree of polymerization, such as monomers and oligomers contained in the silicone resin, comes into contact with the connection part between the panel electrode terminal and the connection terminal, resulting in an external connection via a joining member. Since it is possible to reliably prevent the disadvantage that the bonding strength between the terminal and the connection terminal decreases with time, the bonding strength between the panel electrode terminal and the connection terminal of the flexible circuit board can be maintained for a long period of time. It has an extremely excellent effect.
[0030]
Moreover, according to the flexible circuit board mounting structure of the liquid crystal display panel of the present invention according to claim 2, there is an extremely excellent effect that a weir can be easily formed at an arbitrary position .
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of a main part of a flexible circuit board mounting structure of a liquid crystal display panel according to the present invention. FIG. 2 shows a configuration of a main part of a flexible circuit board mounting structure of a liquid crystal display panel according to the present invention. FIG. 3 is a cross-sectional view showing a configuration of a main part of a conventional flexible circuit board mounting structure of a liquid crystal display panel. FIG. 4 is a plan view showing a configuration of a main part of a conventional flexible circuit board mounting structure of a liquid crystal display panel. [Explanation of symbols]
2 Substrate 2a Panel electrode terminal forming part 3 Transparent electrode 5 Driver IC for driving liquid crystal
6 Liquid Crystal Display Unit 10 Panel Electrode Terminal 11 Flexible Circuit Board 11a (Flexible Circuit Board) Connection Terminal 12 Joining Member 13 Silicone Resin 20 Panel Electrode Terminal Structure 21 Weir (as Contact Prevention Means)

Claims (3)

液晶表示パネルの基板に形成した所定パターンのパネル電極端子に液晶駆動用ドライバICのIC電極端子を電気的に接続するとともに、前記パネル電極端子のうちの前記液晶駆動用ドライバICの入力側に位置するパネル電極端子にフレキシブル回路基板の接続端子を電気的に接続し、少なくとも前記パネル電極端子と前記IC電極端子との接続部位をシリコーンレジンによりモールドしてなる液晶表示パネルのフレキシブル回路基板実装構造において、
前記パネル電極端子と前記接続端子との接続部位が前記シリコーンレジンに接触するのを防止する堰が設けられており、
前記堰が、前記パネル電極端子に前記接続端子を接続した後に、前記パネル電極端子と前記接続端子との接続部位の周辺で前記フレキシブル回路基板を囲むように覆って形成されており、
前記シリコーンレジンによるモールドが、前記堰を形成した後に、前記パネル電極端子と前記IC電極端子との接続部位に前記シリコーンレジンを塗布することにより形成されていることを特徴とする液晶表示パネルのフレキシブル回路基板実装構造。
An IC electrode terminal of a liquid crystal driving driver IC is electrically connected to a panel electrode terminal of a predetermined pattern formed on the substrate of the liquid crystal display panel, and is positioned on the input side of the liquid crystal driving driver IC among the panel electrode terminals In a flexible circuit board mounting structure for a liquid crystal display panel, wherein a connection terminal of a flexible circuit board is electrically connected to a panel electrode terminal to be molded, and at least a connection portion between the panel electrode terminal and the IC electrode terminal is molded with a silicone resin ,
A weir is provided to prevent the connection part between the panel electrode terminal and the connection terminal from contacting the silicone resin,
The dam is formed so as to surround the flexible circuit board around the connection portion between the panel electrode terminal and the connection terminal after connecting the connection terminal to the panel electrode terminal,
The liquid crystal display panel flexible, wherein the silicone resin mold is formed by applying the silicone resin to a connection portion between the panel electrode terminal and the IC electrode terminal after forming the weir. Circuit board mounting structure.
前記堰が、紫外線硬化樹脂により形成されていることを特徴とする請求項1に記載の液晶表示パネルのフレキシブル回路基板実装構造。  The flexible circuit board mounting structure for a liquid crystal display panel according to claim 1, wherein the weir is formed of an ultraviolet curable resin. 前記紫外線硬化樹脂が、ディスペンサを用いて塗工されていることを特徴とする請求項2に記載の液晶表示パネルのフレキシブル回路基板実装構造。  The flexible circuit board mounting structure for a liquid crystal display panel according to claim 2, wherein the ultraviolet curable resin is applied using a dispenser.
JP2000300308A 2000-09-29 2000-09-29 Flexible circuit board mounting structure of liquid crystal display panel Expired - Fee Related JP4861548B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000300308A JP4861548B2 (en) 2000-09-29 2000-09-29 Flexible circuit board mounting structure of liquid crystal display panel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000300308A JP4861548B2 (en) 2000-09-29 2000-09-29 Flexible circuit board mounting structure of liquid crystal display panel

Publications (2)

Publication Number Publication Date
JP2002107754A JP2002107754A (en) 2002-04-10
JP4861548B2 true JP4861548B2 (en) 2012-01-25

Family

ID=18782007

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000300308A Expired - Fee Related JP4861548B2 (en) 2000-09-29 2000-09-29 Flexible circuit board mounting structure of liquid crystal display panel

Country Status (1)

Country Link
JP (1) JP4861548B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5144014B2 (en) * 2005-12-28 2013-02-13 京セラディスプレイ株式会社 Manufacturing method of display panel
US7649611B2 (en) 2005-12-30 2010-01-19 Asml Netherlands B.V. Lithographic apparatus and device manufacturing method
JP2008085234A (en) * 2006-09-28 2008-04-10 Casio Comput Co Ltd Method of manufacturing electronic circuit board
CN108886871A (en) * 2016-03-11 2018-11-23 株式会社藤仓 Wiring body component, Wiring structure body and touch sensor
JP2017163067A (en) * 2016-03-11 2017-09-14 株式会社フジクラ Wiring body assembly, wiring structure, and touch sensor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2782634B2 (en) * 1990-06-18 1998-08-06 オムロン株式会社 Electromagnetic relay
JPH0728084A (en) * 1993-07-09 1995-01-31 Yazaki Corp Production of liquid crystal cell
JP3306236B2 (en) * 1994-10-31 2002-07-24 三洋電機株式会社 Liquid crystal display
JPH0968715A (en) * 1995-09-01 1997-03-11 Hitachi Ltd Liquid crystal display device
JP3873478B2 (en) * 1997-12-25 2007-01-24 セイコーエプソン株式会社 Liquid crystal display device, electronic device, and method of manufacturing liquid crystal display device
JP3353719B2 (en) * 1998-09-16 2002-12-03 日本電気株式会社 Electrode terminal extraction structure for plasma display panel

Also Published As

Publication number Publication date
JP2002107754A (en) 2002-04-10

Similar Documents

Publication Publication Date Title
KR102628939B1 (en) Liquid crystal display device
JP4523848B2 (en) Liquid crystal display
US8016181B2 (en) Method of producing electro-optical device using anisotropic conductive adhesive containing conductive particles to bond terminal portions and electro-optical device
CN101297340A (en) Display device
JP3025256B1 (en) Mounting method of TCP film on display panel
JP2012220781A (en) Method of manufacturing display device
JP4265757B2 (en) Display module and manufacturing method thereof
TW200846784A (en) Liquid crystal panel, thin film transistors array substrate and curing line structure thereof in use of phase separation alignment process
JP4861548B2 (en) Flexible circuit board mounting structure of liquid crystal display panel
CN1574261A (en) Method of mounting electronic component, structure for mounting electronic component, electronic component module, and electronic apparatus
KR20080080740A (en) Array substrate and display apparatus having the same
JP3973887B2 (en) Manufacturing method of liquid crystal display element
JP2017134329A (en) Liquid crystal display device and manufacturing method of the same
JP2005122078A (en) Liquid crystal display and method for manufacturing the same
WO2017119120A1 (en) Liquid crystal display device
KR20070096572A (en) Display apparatus
JP3324798B2 (en) Electro-optical device and method of manufacturing the same
JPH06331999A (en) Electrooptical device and its production
JP2005148523A (en) Manufacturing method of liquid crystal display device
KR101096696B1 (en) Liquid crystal display device
JP3636193B2 (en) Liquid crystal panel and method of manufacturing liquid crystal panel
JP5144014B2 (en) Manufacturing method of display panel
JPH11167092A (en) Manufacture of liquid crystal display device
JP2005202360A (en) Liquid crystal device, method for manufacturing liquid crystal device, and electronic equipment
JP6383593B2 (en) Liquid crystal display

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20070928

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100831

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100831

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101027

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110208

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110404

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20111025

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20111107

R150 Certificate of patent or registration of utility model

Ref document number: 4861548

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20141111

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20141111

Year of fee payment: 3

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20141111

Year of fee payment: 3

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

LAPS Cancellation because of no payment of annual fees