JP2004233842A - Liquid crystal display panel - Google Patents

Liquid crystal display panel Download PDF

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Publication number
JP2004233842A
JP2004233842A JP2003024385A JP2003024385A JP2004233842A JP 2004233842 A JP2004233842 A JP 2004233842A JP 2003024385 A JP2003024385 A JP 2003024385A JP 2003024385 A JP2003024385 A JP 2003024385A JP 2004233842 A JP2004233842 A JP 2004233842A
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Japan
Prior art keywords
liquid crystal
electrode
crystal display
display panel
terminal
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JP2003024385A
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Japanese (ja)
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JP4347581B2 (en
Inventor
Mutsumi Abe
睦 阿部
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Kyocera Display Corp
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Kyocera Display Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To discharge charges produced by electrification in the manufacturing process through a lead electrode side even in a COG (chip-on-glass) type liquid crystal display panel. <P>SOLUTION: A discharge circuit 130 which has a discharge inducing part 140 opposing through a specified gap to the end of lead electrode 121 electrically connected to the transparent electrode for display in the panel plane, is formed in the mounting region 110 for chip parts provided in the terminal 100 of the COG type liquid crystal display panel. The lead electrode 132 of the discharge circuit 130 is drawn to the end edge 101 of the terminal 100. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、端子部に液晶駆動用チップ部品が実装されるCOG(chip on glass)型の液晶表示パネルに関し、さらに詳しく言えば、その製造工程で帯電した静電気の隣接する表示用透明電極間での放電による不良発生を防止する技術に関するものである。
【0002】
【従来の技術】
液晶表示パネルは、ガラスもしくはプラスチックからなる誘電体基板を含んでいるため、静電気を帯びやすい。その一般的な構成を図3により説明すると、液晶表示パネル1は、互いに対向する面に表示用の透明電極が形成された例えばガラスからなる一対の透明電極基板1a,1bを備えている。
【0003】
ドットマトリックス型の表示素子の場合においては、一方の透明電極基板1aには、例えばX軸方向(図3の横方向)に沿ってストライプ状に表示電極が形成され、他方の透明電極基板1bには、それと直交するY軸方向に沿ってストライプ状に表示電極が形成される。なお、各表示電極上にはさらに配向膜が設けられる。
【0004】
各透明電極基板1a,1bは、それらの表示電極間に図示しない面内スペーサを配置した状態で、周辺シール材2を介して互いに貼り合わせられるが、少なくとも一方の透明電極基板側に端子部を備えている。
【0005】
この例は一方向取り出し型で、透明電極基板1a側のみに、他方の透明電極基板1bの端面より張り出す端子部3が連設されている。なお、二方向取り出し型として、各透明電極基板にそれぞれ端子部が設けられる機種もある。
【0006】
図3には示されていないが、端子部3には、各透明電極基板1a,1bの表示電極に連なる引出電極が形成されている。この場合、他方の透明電極基板1bの表示電極は、周辺シール材2内の図示しないトランスファを介して端子部3の所定の引出電極に電気的に接続される。
【0007】
各透明電極基板1a,1bを貼り合わせた後に、それらの間のセル4内に電気光学媒体としての液晶が封入される。このようにして、パネル素子が形成され、次に同パネル素子の表面に偏光膜5,5が貼り付けられる。
【0008】
液晶表示パネルの製造に際しては、種々の工程で静電気が発生しパネルに帯電されるが、帯電した電荷は比較的体積固有抵抗値の低いものに接触することにより放電される。
【0009】
しかしながら、近年においては、液晶駆動用ICの発達に伴い表示パターンが増大し、パターン面積もきわめて大きくなってきている。また、ドットマトリクス型においては、開口率を上げるために、その表示電極間の幅がますます狭くされ、これによりセル内部で放電しやすい構造となってきている。
【0010】
一例として、液晶製造工程で、ITO(Indium Tin Oxide)からなる表示電極に帯電された電荷は、その上に配向膜を形成する際に、表示電極間で局部的に放電し、これによって配向膜が損傷して配向不良となることがある。この静電気対策の技術の一つとして、下記の特許文献1がある。これを図3および図4により説明する。図4は、上記端子部3上に形成された引出電極群20を示している。
【0011】
特許文献1では、端子部3に、その端縁3aとほぼ平行な切断線Lに沿って最終的に切り落とされる所定幅の捨て基板部11を設ける。この捨て基板部11に、引出電極群20のうちの例えば偶数番目に属する引出電極22,24…に対して共通に接続され、その各引出電極22,24…を同電位とする共通導体30を形成する。奇数番目に属する引出電極21,23,25…については、共通導体30との間に、それらの各端部を所定のギャップGをもって対向させてなる放電誘発部40を形成する。
【0012】
これによれば、パネルの帯電量が所定値を超えると、その電荷が放電誘発部40のギャップG間で放電するため、例えば配向膜形成時にあっては、配向膜の損傷を防止することができる。また、引出電極が一つ置きに共通導体30に接続されているため、共通導体30に点灯信号を印加することにより、表示電極間のリーク検査をも行うことができる。
【0013】
なお、特許文献1のほかに、例えば引出電極を端子部の捨て基板部にまで引き出し、その各々を外部ダミー端子に直接つなげて、パネルに帯電された電荷を放電誘発部によることなく放電させる技術も知られている。
【0014】
【特許文献1】
特開2000−47242(図2)
【0015】
【発明が解決しようとする課題】
しかしながら、特許文献1を含む従来技術は、引出電極が端子部の端縁にまで引き出されている場合に有効であり、端子部上にチップ部品としての液晶駆動用のIC(もしくはLSI)チップを直接的に実装するCOG型の液晶表示パネルには適用することができない。
【0016】
すなわち、COG型の液晶表示パネルにおいては、その端子部のほぼ中央部分に、上記ICチップの電極端子(バンプ)と接続される多数の端子パッドを有するチップ部品実装領域が設けられており、各引出電極がチップ部品実装領域内の端子パッドのところで終端し、端子部の端縁にまで引き出されていないためである。
【0017】
したがって、本発明の課題は、COG型の液晶表示パネルの製造過程で、そのパネルに帯電された電荷を引出電極から放電させることを可能として、表示用透明電極間での局所的な放電による不良発生を防止することにある。
【0018】
【課題を解決するための手段】
上記課題を解決するため、本発明は、周辺シール材を介して貼り合わせられたそれぞれが表示用透明電極を有する一対の透明電極基板を含み、上記透明電極基板の端子部に、液晶駆動用チップ部品の電極端子と接続される多数の端子パッドを有するチップ部品実装領域が設けられており、上記表示用透明電極の各引出電極が上記端子パッドに接続されているCOG型の液晶表示パネルにおいて、上記チップ部品実装領域内に、上記各引出電極の末端部との間で所定のギャップをもって対向する放電誘発部を有する放電回路が形成されているとともに、上記放電回路が上記端子部の端縁にまで引き出されていることを特徴としている。
【0019】
この構成によれば、パネルの帯電量が所定値を超えた場合には、その電荷がチップ部品実装領域内に設けられている放電回路と引出電極との間の放電誘発部で放電するため、例えば配向膜形成時にあっては、配向膜の損傷を防止することができる。
【0020】
上記放電誘発部は、引出電極の末端部と放電回路の双方に対向的に形成された一対の突起状のアレスタ電極からなることが好ましいが、アレスタ電極は引出電極の末端部と放電回路のいずれか一方に設けられてもよく、この態様も本発明に含まれる。
【0021】
なお、表示用透明電極間で放電が起こる前に放電誘発部で帯電電荷を放電させる必要があるため、放電誘発部のギャップは、少なくとも表示用透明電極の線間幅よりも狭くされるが、特には表示用透明電極の線間幅の1/2以下であることが好ましい。
【0022】
【発明の実施の形態】
次に、図1および図2を参照して、本発明の実施形態について説明する。図1は本発明における端子部の要部を示す拡大平面図で、図2はその要部の一部をさらに拡大して示す拡大図である。なお、端子部以外の構成は、先の図3で説明した構成と同じであってよいため、その説明は省略する。
【0023】
また、本発明は、一方の透明電極基板にのみ端子部を備える一方向取り出し型液晶表示パネル、両方の透明電極基板にそれぞれ端子部を備える二方向取り出し型液晶表示パネルのいずれにも適用可能である。
【0024】
本発明の液晶表示パネルはCOG型であるため、図1に示すように、その端子部100に、二点の想像線で示す四角形枠状のチップ部品実装領域110を備えている。チップ部品実装領域110は、通常、端子部100のほぼ中央に配置されるが、設計の都合によって、その位置は任意に決められてよい。
【0025】
端子部100に実装する液晶駆動用のIC(もしくはLSI)チップは図示を省略しているが、チップ部品実装領域110内には、そのICチップ側に設けられている電極端子と接続される多数の端子パッド111,112が設けられている。通常、液晶駆動用のICチップにはベアチップが用いられるため、電極端子は金バンプよりなるが、パッケージ型ICに採用されている脚状の金属製リード端子であってもよい。
【0026】
端子パッド111,112のうち、この例では、端子パッド111が、ICチップの出力側電極端子と接続される出力側端子パッドで、チップ部品実装領域110の図1において上辺および左右両辺に沿って配置されている。他方の端子パッド112は、ICチップの入力側電極端子と接続される入力側端子パッドで、チップ部品実装領域110の図1において下辺に沿って配置されている。
【0027】
出力側端子パッド111には、液晶表示パネル内の表示用透明電極に電気的に連なる引出電極121が接続され、また、入力側端子パッド112には、端子部100の端縁101側から延びる入力電極122が接続されている。入力電極122には、図示しない液晶駆動回路側のフレキシブル基板(FPC,TCP,COFなど)が例えば異方性導電フィルムを介して接続される。
【0028】
引出電極121および入力電極122は、ともに表示用透明電極と同じくITO材より形成されている。したがって、引出電極121および入力電極122がチップ部品実装領域110内に入り込むように形成されるとともに、各電極121,122の末端部に出力側端子パッド111と入力側端子パッド112とが形成される。
【0029】
パネル面内の表示用透明電極に帯電した静電気を引出電極121から放電させるため、チップ部品実装領域110内には放電回路130が形成されている。この例において、放電回路130は、チップ部品実装領域110内の図1において上辺および左右両辺に沿って形成されており、図2に示すように、各引出電極121と対向する位置に突起状のアレスタ(arrester)電極131を一体に備えている。放電回路130は、好ましくはITO材より形成され、その一部分から端子部100の端縁101に向けてリード電極132が引き出されている。
【0030】
放電回路130が設けられることに伴って、各引出電極121は出力側端子パッド111よりもチップ部品実装領域110の内側に向けて延長されており、その末端部に、上記アレスタ電極131と所定のギャップをもって対向して放電誘発部140を形成する同じく突起状のアレスタ電極123を備えている。
【0031】
放電誘発部140のギャップは、静電気の放電を効果的に誘発させるうえで、パネル面内の表示用透明電極の線間幅よりも狭くされていることが好ましく、例えば表示用透明電極の線間幅が0.02mmであるとすると、その半分の0.01mm程度に設定される。
【0032】
この構成によれば、放電回路130のリード電極132を外部機器のグランドなどに接続しておくことにより、例えば配向膜の形成工程や偏光膜の貼着工程で発生した静電気により、パネル面内の表示用透明電極に対する帯電量が所定値を超えた場合には、その電荷が上記放電誘発部140で放電されることになる。
【0033】
上記実施形態で説明したように、放電回路130と引出電極121とにアレスタ電極をそれぞれ設けることが好ましいが、そのいずれか一方にのみアレスタ電極を設け、他方はそのアレスタ電極に対向する平坦面としてもよい。また、アレスタ電極に鋸歯状の複数の尖鋭突起を含ませることもできる。
【0034】
【発明の効果】
以上説明したように、本発明によれば、COG型の液晶表示パネルにおいて、その端子部に設けられているチップ部品実装領域内に、パネル面内の表示用透明電極に電気的に連なる各引出電極の末端部との間で所定のギャップをもって対向する放電誘発部を有する放電回路を形成し、その放電回路のリード電極を記端子部の端縁にまで引き出すようにしたことにより、COG型の液晶表示パネルにおいても、その製造過程で帯電された電荷を引出電極側から放電させることが可能となり、表示用透明電極間での局所的な放電による不良発生を防止することができる。
【図面の簡単な説明】
【図1】本発明の液晶表示パネルが備える端子部のチップ部品実装領域を拡大して示す平面図。
【図2】上記チップ部品実装領域内の放電誘発部の構成を拡大して示す模式図。
【図3】液晶表示パネルの一般的な構成を説明するための模式的断面図。
【図4】放電誘発部の従来技術を示す説明図。
【符号の説明】
100 端子部
101 端縁
110 チップ部品実装領域
111 出力側端子パッド
112 入力側端子パッド
121 引出電極
123 アレスタ電極
122 入力電極
130 放電回路
131 アレスタ電極
132 リード電極
140 放電誘発部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a COG (chip on glass) type liquid crystal display panel in which a liquid crystal driving chip component is mounted on a terminal portion, and more specifically, between adjacent display transparent electrodes of static electricity charged in the manufacturing process. The present invention relates to a technique for preventing the occurrence of a defect due to discharge of an electric field.
[0002]
[Prior art]
Since the liquid crystal display panel includes a dielectric substrate made of glass or plastic, it is easily charged with static electricity. The general configuration will be described with reference to FIG. 3. The liquid crystal display panel 1 includes a pair of transparent electrode substrates 1a and 1b made of, for example, glass having transparent electrodes for display formed on surfaces facing each other.
[0003]
In the case of a dot matrix type display element, display electrodes are formed in a stripe shape along the X-axis direction (horizontal direction in FIG. 3) on one transparent electrode substrate 1a, and on the other transparent electrode substrate 1b. The display electrodes are formed in stripes along the Y-axis direction orthogonal to the display electrodes. Note that an alignment film is further provided on each display electrode.
[0004]
Each of the transparent electrode substrates 1a and 1b is bonded to each other via a peripheral sealing material 2 in a state where an in-plane spacer (not shown) is arranged between the display electrodes, and a terminal portion is provided on at least one of the transparent electrode substrates. Have.
[0005]
This example is a one-way take-out type, in which terminal portions 3 projecting from the end face of the other transparent electrode substrate 1b are continuously provided only on the transparent electrode substrate 1a side. Note that, as a two-way take-out type, there is also a model in which a terminal portion is provided on each transparent electrode substrate.
[0006]
Although not shown in FIG. 3, the terminal portion 3 is formed with an extraction electrode connected to the display electrode of each of the transparent electrode substrates 1a and 1b. In this case, the display electrode of the other transparent electrode substrate 1b is electrically connected to a predetermined lead electrode of the terminal portion 3 via a transfer (not shown) in the peripheral sealing material 2.
[0007]
After bonding the transparent electrode substrates 1a and 1b, a liquid crystal as an electro-optical medium is sealed in the cell 4 between them. Thus, a panel element is formed, and then the polarizing films 5 and 5 are attached to the surface of the panel element.
[0008]
In manufacturing a liquid crystal display panel, static electricity is generated in various steps and the panel is charged, but the charged charge is discharged by contact with a substance having a relatively low volume resistivity.
[0009]
However, in recent years, display patterns have increased with the development of liquid crystal driving ICs, and the pattern area has become extremely large. Further, in the dot matrix type, the width between the display electrodes is further narrowed in order to increase the aperture ratio, whereby a structure in which discharge is easily performed inside the cell has been realized.
[0010]
As an example, in a liquid crystal manufacturing process, a charge charged on a display electrode made of ITO (Indium Tin Oxide) is locally discharged between the display electrodes when an alignment film is formed thereon, thereby forming an alignment film. May be damaged, resulting in poor alignment. As one of the techniques for countermeasures against static electricity, there is the following Patent Document 1. This will be described with reference to FIGS. FIG. 4 shows an extraction electrode group 20 formed on the terminal portion 3.
[0011]
In Patent Literature 1, the terminal portion 3 is provided with a discarded substrate portion 11 having a predetermined width which is finally cut off along a cutting line L substantially parallel to the edge 3a. A common conductor 30 that is commonly connected to, for example, the even-numbered extraction electrodes 22, 24... Of the extraction electrode group 20 and has the same potential as each of the extraction electrodes 22, 24. Form. With respect to the odd-numbered extraction electrodes 21, 23, 25,..., A discharge inducing portion 40 is formed between the common conductor 30 and each end thereof with a predetermined gap G.
[0012]
According to this, when the charge amount of the panel exceeds a predetermined value, the charge is discharged between the gaps G of the discharge inducing section 40, so that it is possible to prevent the alignment film from being damaged, for example, when forming the alignment film. it can. Further, since every other extraction electrode is connected to the common conductor 30, a leak test between the display electrodes can be performed by applying a lighting signal to the common conductor 30.
[0013]
In addition to the technique disclosed in Patent Document 1, for example, an extraction electrode is drawn out to a discarded substrate portion of a terminal portion, and each of the extraction electrodes is directly connected to an external dummy terminal, thereby discharging a charge on the panel without using a discharge inducing portion. Is also known.
[0014]
[Patent Document 1]
JP-A-2000-47242 (FIG. 2)
[0015]
[Problems to be solved by the invention]
However, the prior art including Patent Document 1 is effective when the extraction electrode is extended to the edge of the terminal portion, and an IC (or LSI) chip for driving a liquid crystal as a chip component is provided on the terminal portion. It cannot be applied to a directly mounted COG type liquid crystal display panel.
[0016]
That is, in the COG type liquid crystal display panel, a chip component mounting area having a large number of terminal pads connected to the electrode terminals (bumps) of the IC chip is provided substantially at the center of the terminal portion. This is because the extraction electrode terminates at the terminal pad in the chip component mounting area and is not extended to the edge of the terminal portion.
[0017]
Therefore, an object of the present invention is to make it possible to discharge a charge charged to a COG-type liquid crystal display panel from an extraction electrode in a manufacturing process of the panel, thereby causing a defect due to local discharge between display transparent electrodes. It is to prevent occurrence.
[0018]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention includes a pair of transparent electrode substrates each having a transparent electrode for display bonded together via a peripheral sealing material, and a terminal for a liquid crystal driving chip is provided at a terminal portion of the transparent electrode substrate. In a COG type liquid crystal display panel, a chip component mounting area having a large number of terminal pads connected to the electrode terminals of the component is provided, and each extraction electrode of the display transparent electrode is connected to the terminal pad. In the chip component mounting area, a discharge circuit having a discharge inducing portion facing the terminal portion of each of the extraction electrodes with a predetermined gap is formed, and the discharge circuit is provided at an edge of the terminal portion. It is characterized by being pulled out.
[0019]
According to this configuration, when the charge amount of the panel exceeds a predetermined value, the charge is discharged by the discharge inducing section between the discharge circuit provided in the chip component mounting area and the extraction electrode, For example, when forming an alignment film, damage to the alignment film can be prevented.
[0020]
The discharge inducing section preferably comprises a pair of protruding arrestor electrodes formed opposite to both the end of the extraction electrode and the discharge circuit. It may be provided on either side, and this embodiment is also included in the present invention.
[0021]
In addition, since it is necessary to discharge the charged charges in the discharge inducing portion before the discharge occurs between the display transparent electrodes, the gap of the discharge inducing portion is at least narrower than the line width of the display transparent electrode, In particular, it is preferable that the width is not more than 1/2 of the line width of the display transparent electrode.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an enlarged plan view showing a main part of a terminal part in the present invention, and FIG. 2 is an enlarged view showing a part of the main part further enlarged. Note that the configuration other than the terminal portion may be the same as the configuration described with reference to FIG. 3, and a description thereof will be omitted.
[0023]
Further, the present invention can be applied to any of a one-way take-out liquid crystal display panel having a terminal portion only on one transparent electrode substrate and a two-way take-out type liquid crystal display panel having a terminal portion on both transparent electrode substrates. is there.
[0024]
Since the liquid crystal display panel of the present invention is a COG type, as shown in FIG. 1, its terminal portion 100 is provided with a rectangular frame-shaped chip component mounting region 110 indicated by two imaginary lines. The chip component mounting area 110 is usually arranged substantially at the center of the terminal section 100, but its position may be arbitrarily determined depending on the design.
[0025]
Although an IC (or LSI) chip for driving a liquid crystal mounted on the terminal unit 100 is not shown, a large number of electrode terminals provided on the IC chip side are provided in the chip component mounting area 110. Terminal pads 111 and 112 are provided. Usually, a bare chip is used as an IC chip for driving a liquid crystal, so that the electrode terminals are made of gold bumps. However, leg-shaped metal lead terminals used in a packaged IC may be used.
[0026]
Among the terminal pads 111 and 112, in this example, the terminal pad 111 is an output terminal pad connected to the output electrode terminal of the IC chip, and extends along the upper side and both left and right sides of the chip component mounting area 110 in FIG. Are located. The other terminal pad 112 is an input terminal pad connected to the input electrode terminal of the IC chip, and is arranged along the lower side of the chip component mounting area 110 in FIG.
[0027]
The output terminal pad 111 is connected to an extraction electrode 121 electrically connected to the display transparent electrode in the liquid crystal display panel, and the input terminal pad 112 is connected to an input terminal extending from the edge 101 of the terminal portion 100. The electrode 122 is connected. A flexible substrate (FPC, TCP, COF, etc.) on the liquid crystal drive circuit side (not shown) is connected to the input electrode 122 via, for example, an anisotropic conductive film.
[0028]
The extraction electrode 121 and the input electrode 122 are both formed of an ITO material like the transparent electrode for display. Therefore, the extraction electrode 121 and the input electrode 122 are formed so as to enter the chip component mounting area 110, and the output terminal pad 111 and the input terminal pad 112 are formed at the ends of the electrodes 121 and 122. .
[0029]
A discharge circuit 130 is formed in the chip component mounting area 110 to discharge static electricity charged on the display transparent electrode in the panel surface from the extraction electrode 121. In this example, the discharge circuit 130 is formed along the upper side and both the left and right sides in FIG. 1 in the chip component mounting area 110, and as shown in FIG. An arrestor electrode 131 is integrally provided. The discharge circuit 130 is preferably formed of an ITO material, and a lead electrode 132 is drawn out from a part thereof toward the edge 101 of the terminal portion 100.
[0030]
With the provision of the discharge circuit 130, each extraction electrode 121 extends toward the inside of the chip component mounting area 110 beyond the output side terminal pad 111. An arrestor electrode 123 having the same protruding shape and forming a discharge inducing portion 140 is provided to face with a gap.
[0031]
The gap of the discharge inducing section 140 is preferably narrower than the line width of the display transparent electrodes in the panel surface in order to effectively induce electrostatic discharge. Assuming that the width is 0.02 mm, the width is set to about 0.01 mm, which is half of the width.
[0032]
According to this configuration, by connecting the lead electrode 132 of the discharge circuit 130 to the ground of an external device or the like, for example, static electricity generated in a process of forming an alignment film or a process of attaching a polarizing film causes a phenomenon in the panel surface. When the amount of charge on the display transparent electrode exceeds a predetermined value, the charge is discharged by the discharge inducing section 140.
[0033]
As described in the above embodiment, it is preferable to provide an arrester electrode on each of the discharge circuit 130 and the extraction electrode 121, but an arrester electrode is provided only on one of them, and the other is formed as a flat surface facing the arrester electrode. Is also good. Further, the arrester electrode may include a plurality of sharp protrusions having a sawtooth shape.
[0034]
【The invention's effect】
As described above, according to the present invention, in the COG type liquid crystal display panel, each lead electrically connected to the display transparent electrode in the panel surface is provided in the chip component mounting region provided in the terminal portion. A COG-type discharge circuit was formed by forming a discharge circuit having a discharge inducing portion facing the terminal portion of the electrode with a predetermined gap and leading the lead electrode of the discharge circuit to the edge of the terminal portion. Also in the liquid crystal display panel, it is possible to discharge the charge charged in the manufacturing process from the extraction electrode side, and it is possible to prevent the occurrence of a defect due to local discharge between the transparent electrodes for display.
[Brief description of the drawings]
FIG. 1 is an enlarged plan view showing a chip component mounting area of a terminal portion provided in a liquid crystal display panel of the present invention.
FIG. 2 is an enlarged schematic view showing a configuration of a discharge inducing section in the chip component mounting area.
FIG. 3 is a schematic cross-sectional view illustrating a general configuration of a liquid crystal display panel.
FIG. 4 is an explanatory view showing a conventional technique of a discharge inducing section.
[Explanation of symbols]
REFERENCE SIGNS LIST 100 terminal portion 101 edge 110 chip component mounting area 111 output-side terminal pad 112 input-side terminal pad 121 extraction electrode 123 arrester electrode 122 input electrode 130 discharge circuit 131 arrester electrode 132 lead electrode 140 discharge inducing section

Claims (3)

周辺シール材を介して貼り合わせられたそれぞれが表示用透明電極を有する一対の透明電極基板を含み、上記透明電極基板の端子部に、液晶駆動用チップ部品の電極端子と接続される多数の端子パッドを有するチップ部品実装領域が設けられており、上記表示用透明電極の各引出電極が上記端子パッドに接続されているCOG型の液晶表示パネルにおいて、
上記チップ部品実装領域内に、上記各引出電極の末端部との間で所定のギャップをもって対向する放電誘発部を有する放電回路が形成されているとともに、上記放電回路が上記端子部の端縁にまで引き出されていることを特徴とする液晶表示パネル。
A plurality of terminals each including a pair of transparent electrode substrates each having a transparent electrode for display bonded to each other via a peripheral sealing material, and a plurality of terminals connected to electrode terminals of a chip part for driving a liquid crystal at terminal portions of the transparent electrode substrate. In a COG type liquid crystal display panel in which a chip component mounting area having a pad is provided, and each extraction electrode of the display transparent electrode is connected to the terminal pad,
In the chip component mounting area, a discharge circuit having a discharge inducing portion facing the terminal portion of each of the extraction electrodes with a predetermined gap is formed, and the discharge circuit is provided at an edge of the terminal portion. A liquid crystal display panel, which has been drawn out to the end.
上記放電誘発部が、上記放電回路側および/または上記引出電極の末端部側に形成された突起状のアレスタ電極からなる請求項1に記載の液晶表示パネル。2. The liquid crystal display panel according to claim 1, wherein the discharge inducing section is formed of a protruding arrester electrode formed on the discharge circuit side and / or on a terminal side of the extraction electrode. 上記放電誘発部のギャップは、上記表示用透明電極間の幅よりも狭くされている請求項1または2に記載の液晶表示パネル。The liquid crystal display panel according to claim 1, wherein a gap of the discharge inducing section is smaller than a width between the display transparent electrodes.
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