JPS6326631A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPS6326631A JPS6326631A JP17012586A JP17012586A JPS6326631A JP S6326631 A JPS6326631 A JP S6326631A JP 17012586 A JP17012586 A JP 17012586A JP 17012586 A JP17012586 A JP 17012586A JP S6326631 A JPS6326631 A JP S6326631A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- liquid crystal
- wiring
- gap
- display device
- 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.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 42
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 230000002950 deficient Effects 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は表示装置時(こ液晶表示装置に関する。[Detailed description of the invention] Industrial applications The present invention relates to a display device (liquid crystal display device).
従来の技術
液晶表示装置は一般に第1の基板の1主面上に一方の電
極部を、第2の基板の1主面上に他方の電極を形成し、
両基板の前記主面を互いに対向させ基板の周辺部を接着
するとともに、両基板と接着部とで構成される空間に液
晶を保持する。この空間〈ギャップ〉を所定の設計値に
保つため、特定径のグラスファイバー又は球状の物質を
スペーサーとして両基板間に分散して用いる。A conventional liquid crystal display device generally has one electrode portion formed on one main surface of a first substrate, and the other electrode formed on one main surface of a second substrate.
The main surfaces of both substrates are made to face each other, and the peripheral portions of the substrates are bonded together, and the liquid crystal is held in a space formed by both substrates and the bonding portion. In order to maintain this space (gap) at a predetermined design value, glass fibers or spherical substances of a specific diameter are used as spacers and dispersed between both substrates.
発明が解決しようとする問題点
近年液晶表示装置の性能向上とともに、液晶層の厚さの
制御が極めて重要な課題となりつつある。即ち従来のツ
イストネマチック(TN)型液晶を用いる場合にも、表
示品位を上げるためマルチギャップ型フルカラー液晶表
示装置が実用化されている。この場合液晶層厚さは表示
品位を決める重要パラメータとなる。またスーパーツイ
スト型構造でも液晶中の光路長制御が同様に重要である
。この液晶層の厚さく以下ギャップという)は、表示装
置の表示部全域にわたり均一に制御されねばならなす、
部分的にもギャップむらが存在する場合には、表示のむ
らとなり表示品位を劣化させる。従って表示部全域にわ
たりギャップを均一に保持することは工業上極めて重要
な課題となる。Problems to be Solved by the Invention In recent years, as the performance of liquid crystal display devices has improved, control of the thickness of the liquid crystal layer has become an extremely important issue. That is, even when using a conventional twisted nematic (TN) type liquid crystal, a multi-gap type full color liquid crystal display device has been put into practical use in order to improve display quality. In this case, the liquid crystal layer thickness becomes an important parameter that determines display quality. Also, in the supertwist structure, controlling the optical path length in the liquid crystal is equally important. The thickness of this liquid crystal layer (hereinafter referred to as the gap) must be controlled uniformly over the entire display area of the display device.
If gap unevenness exists even partially, the display becomes uneven and the display quality deteriorates. Therefore, maintaining a uniform gap over the entire display area is an extremely important issue industrially.
2枚の基板の両生面が完全に平坦である場合には、分散
された特定径のスペーサー物質は両基板より均等な力を
受け、ギャップは前記物質の径で定められる。しかしな
がら液晶表示装置用基板の前記主面には、表示電極やそ
の他の構造が作り込まれている為厳密には平坦でない。If the two substrates have completely flat surfaces, the dispersed spacer material of a specific diameter will receive an equal force from both substrates, and the gap will be defined by the diameter of the material. However, the main surface of the substrate for a liquid crystal display device is not strictly flat because display electrodes and other structures are formed therein.
特に薄膜トランジスタ(TPT)やダイオードなどの活
性素子が作り込まれた基板の表面は数千A〜1μm程度
の表示凹凸を有するのが普通である。この様な場合ギャ
ップは前記物質の特定径のみでさだめられるのではな(
、基板表面の凸部の高さと特定径とで定められるように
なる。In particular, the surface of a substrate on which active elements such as thin film transistors (TPTs) and diodes are formed usually has display irregularities of approximately several thousand amps to 1 μm. In such a case, the gap may be filled only by a specific diameter of the material (
, is determined by the height and specific diameter of the convex portion on the substrate surface.
一方基板表面の凹凸は基板の全域にわたり必ずしも均一
に分布しているものではない。特に両基板の両生面を接
着する領域では、表示要素へ給電する為の配線が形成さ
れた領域が存在するのが常であるが、この配線がかなら
ずしも均等に分布しておらず、ある・領域では密であり
、他の領域では、全く配線が存在しないことがある。こ
の様な場合、配線が密な領域近傍ではギャップが大きく
なり、存在しない領域近傍ではギャップが小さくなる。On the other hand, the unevenness on the substrate surface is not necessarily uniformly distributed over the entire area of the substrate. In particular, in the area where the bidirectional surfaces of both substrates are bonded, there is usually an area where wiring for supplying power to the display element is formed, but this wiring is not necessarily evenly distributed, and there are certain areas where the wiring is formed. In some areas, there may be dense wiring, and in other areas, there may be no wiring at all. In such a case, the gap becomes large near an area where wiring is dense, and the gap becomes small near an area where there is no wiring.
従って特に表示装置の周辺部でギャップの不均一が生じ
ることがしばしば出現した。Therefore, it has often appeared that gap non-uniformity occurs particularly in the peripheral area of the display device.
問題点を解決するための手段
本発明は前記問題点を解決するため1主面上に凹凸が形
成された基板を用いる場合、少な(ともギャップ形成に
関する領域部にはほぼ均等に凹凸を形成すべ(、特に接
着部を横切る給電線が、給電機能の設計上のみでは不要
であり、本来設置する必要がない領域部にも、例えば供
電線と同一材料からなるダミー配線による凹凸形状を形
成してギャップの不均一の発生を防止する。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides that when using a substrate with unevenness formed on one main surface, the unevenness should be formed almost uniformly in the region related to gap formation. (In particular, the power supply line that crosses the adhesive part is unnecessary only in the design of the power supply function, and even in areas where it is not originally necessary to install it, for example, create an uneven shape using dummy wiring made of the same material as the power supply line. Prevent uneven gaps from occurring.
作用
凹凸形状が主面上で均等に形成されていため、凸部の高
さと、スペーサー径で定められるギャップを表示基板全
域にわたって均等に形成することが可能となる。Since the working uneven shape is uniformly formed on the main surface, it is possible to uniformly form the gap defined by the height of the convex portion and the spacer diameter over the entire area of the display substrate.
実施例
第1図に本発明の1実施例の液晶表示装置の部分拡大図
を示す。本実施例では第1の透明ガラス基板lの1主面
上にスイッチング素子となるたとえば非晶質シリコン(
a−3i)薄膜トランジスタ(TPT)と表示電極を2
40行×372列形成した画像表示部2を有し、各TP
T (図示せず)は240本のゲート母線2A、372
本のソース母線2Bの交点に形成されている。各ゲート
母線2Aは基板の外部に配線されたゲート駆動回路との
接続端子部3ヘゲート母線への接続配線部(4)を経て
つながっている。同様に信号母線(ソース母線)2Bは
基板の外部に設置された信号電圧供給回路との接続端子
部5へ信号母線への接続配線部6を経てつながっている
。Embodiment FIG. 1 shows a partially enlarged view of a liquid crystal display device according to an embodiment of the present invention. In this embodiment, for example, amorphous silicon (
a-3i) Thin film transistor (TPT) and display electrode
It has an image display section 2 formed with 40 rows x 372 columns, and each TP
T (not shown) is 240 gate busbars 2A, 372
It is formed at the intersection of the source bus lines 2B of the book. Each gate busbar 2A is connected to a connection terminal portion 3 with a gate drive circuit wired outside the substrate via a connection wiring portion (4) to the gate busbar. Similarly, the signal bus (source bus) 2B is connected to a connection terminal portion 5 with a signal voltage supply circuit installed outside the board via a connection wiring portion 6 to the signal bus.
一方、基板1は、これと対向配置される第2の基板(第
1図では図示せず)と接着部7(第1図の一点鎖線間の
領域)で封着される必要があり、接着部及び接着部の内
部で且つ接続配線の存在しない領域には、表面凹凸の分
布を均一化する目的で、電気的には全く機能しない所定
本数のダミー配線8が設置されている。On the other hand, the substrate 1 needs to be sealed to a second substrate (not shown in FIG. 1) disposed opposite to the substrate 1 with the adhesive part 7 (the area between the dashed-dotted lines in FIG. 1). A predetermined number of dummy wires 8, which do not function electrically at all, are installed inside the bonding portion and the adhesive portion in areas where no connection wires are present, in order to equalize the distribution of surface irregularities.
すなわち、ダミー配線8は、母線、接続配線と同時に形
成すればよく表示基板の一部となる第1の基板1のコー
ナ一部に形成されており、この部分には接続用の配線4
.6が形成されていない。That is, the dummy wiring 8 only needs to be formed at the same time as the bus bar and the connection wiring.
.. 6 is not formed.
なお、ダミー配線8は、配線4相互の間隔が広くすなわ
ち分布密度が疎となる部分においては、配線4の間に形
成してもよい。このことは、配線6においても同様であ
る。Note that the dummy wiring 8 may be formed between the wirings 4 in a portion where the distance between the wirings 4 is wide, that is, the distribution density is sparse. This also applies to the wiring 6.
第2図(a)は本発明の液晶表示装置における接続配線
部を示し、同(b)は接続配線部以外すなわち第1図で
は右上のコーナ一部を示す。10は第2の透明基板、1
1は液晶、12は周辺の接着剤であり、TFT1カラー
フィルタ等は省略している。すなわち、本発明ではギャ
ップ11と12をほぼ等しく保つことが可能となる。FIG. 2(a) shows a connection wiring section in the liquid crystal display device of the present invention, and FIG. 2(b) shows a part other than the connection wiring section, that is, a part of the upper right corner in FIG. 10 is a second transparent substrate, 1
1 is a liquid crystal, 12 is a peripheral adhesive, and the TFT 1 color filter and the like are omitted. That is, according to the present invention, it is possible to maintain the gaps 11 and 12 approximately equal.
このダミー配線8を設置した第1の基板1と第2の基板
(カラー表示の場合にはカラーフィルタ基板)を組合せ
て形成した液晶表示装置では、たとえばギャップ5〜6
μの場合、第1図表示部2の右上のコーナー一部に至る
まで均一(バラツキ±0.1μ11)なギャップを保持
することが可能であった。In a liquid crystal display device formed by combining the first substrate 1 on which the dummy wiring 8 is installed and the second substrate (color filter substrate in the case of color display), for example, gaps 5 to 6 are formed.
In the case of μ, it was possible to maintain a uniform gap (with a variation of ±0.1 μ11) up to a part of the upper right corner of the display section 2 in FIG.
しかし第1図の基板からダミー配線部を形成しない第1
の基板と第2の基板を組合せた液晶表示装置では、前記
右上コーナ一部のギャップは明らかに0.8μm程度も
小さくなり表示品位を劣化させた。このギャップ減少の
程度は接続配線部4.6の凹凸の程度と同程度であった
。即ち4.6に厚さ0.8μmのAI配線を用いたが、
ギャップが部分的に約0.8μm減少し、非常に表示品
位を缶化させた。However, from the substrate shown in Fig. 1, the first
In a liquid crystal display device in which the above substrate and the second substrate were combined, the gap at the upper right corner was clearly reduced by about 0.8 μm, degrading the display quality. The degree of this gap reduction was comparable to the degree of unevenness of the connection wiring portion 4.6. In other words, 0.8 μm thick AI wiring was used in 4.6, but
The gap was partially reduced by about 0.8 μm, which significantly deteriorated the display quality.
発明の効果
以上の実施例を含めて説明したように、本発明によれば
液晶表示装置の表示部全域にわたり均一な液晶層の厚さ
を保持することが可能となる。特に液晶中の光波長が重
要となるツイストネマチック型やスーパーツイスト型特
に強誘電性液晶表示装置等ではギャップの不均一は表示
品位に重大な悪影響を及ぼす。例えばスーパツイスト型
では所定値±0.2μm以下のギャップ精度が必要とな
り、これ以上のギャップ差ののみ表示装置は不良品とせ
ざるを得ない。又ツイストネマティックを使用したマル
チギャップ型フルカラー表示装置においては、ギャップ
誤差の許容度はやや大きくはなるが、所定値近傍に制御
されることが望ましいのは勿論である。ダミー配線を除
いた場合に発生した0、8μ讃にも達する局部的ギャッ
プの減少領域を有する表示装置は不良品とならざるを得
ない。Effects of the Invention As described above, including the above embodiments, according to the present invention, it is possible to maintain a uniform thickness of the liquid crystal layer over the entire display area of a liquid crystal display device. Particularly in twisted nematic type and super twisted type liquid crystal display devices, particularly ferroelectric liquid crystal display devices, in which the wavelength of light in the liquid crystal is important, non-uniformity of the gap has a serious adverse effect on display quality. For example, the super twist type requires a gap accuracy of less than a predetermined value of ±0.2 μm, and only display devices with a gap difference greater than this must be considered defective. Furthermore, in a multi-gap type full color display device using twisted nematics, although the tolerance for gap errors is somewhat larger, it is of course desirable to control the gap error to around a predetermined value. A display device having a local gap reduction region of 0.8 μm, which occurs when the dummy wiring is removed, is inevitably a defective product.
以上の説明のように本発明によれば、極めて簡単な構造
でギャップ不良となる原因を除去することが可能となり
、極めて良好な表示品位を有する液晶表示装置を歩留り
まで安定して製作することが可能となる。As described above, according to the present invention, it is possible to eliminate the causes of gap defects with an extremely simple structure, and it is possible to produce liquid crystal display devices with extremely good display quality with a stable yield. It becomes possible.
又実施例ではダミー配線(a)として、線状に形成した
が、点状又はその他の形状により同様の機能をもたせる
ことが可能となる。Further, in the embodiment, the dummy wiring (a) is formed in a linear shape, but it is possible to provide the same function by using a dotted shape or other shape.
第1図は本発明の1実施例の液晶表示装置の1方の基板
の1主面上の部分拡大平面図、第2図は同装置の部分断
面図である。
1.10・・・基板、2・・・画像表示部、3,5・・
・接続端子部、4,6・・・接続配線部、7・・・接着
部、8・・・ダミー配線。
代理人の氏名 弁理士 中尾敏男 ほか1名第1図FIG. 1 is a partially enlarged plan view of one principal surface of one substrate of a liquid crystal display device according to an embodiment of the present invention, and FIG. 2 is a partially sectional view of the same device. 1.10...Substrate, 2...Image display section, 3,5...
- Connection terminal part, 4, 6... Connection wiring part, 7... Adhesive part, 8... Dummy wiring. Name of agent: Patent attorney Toshio Nakao and one other person Figure 1
Claims (2)
極に電圧を供給する母線が形成され、第2の基板の1主
面上に前記表示電極と対向する電極が形成されており、
前記第1と第2の基板の両主面を互いに対向させて前記
両主面の周辺部を接着するとともに、前記両基板間に間
隔を有しこの間隔中に液晶を保持し、前記第1基板上の
少なくとも接着部において、前記接着部を貫通する電気
的接続とは無関係のダミー配線を形成したことを特徴と
する液晶表示装置。(1) A display electrode and a bus bar for supplying voltage to the display electrode are formed on one main surface of the first substrate, and an electrode facing the display electrode is formed on one main surface of the second substrate. and
Both main surfaces of the first and second substrates are made to face each other and peripheral portions of the two main surfaces are bonded, and a gap is provided between the two substrates, and the liquid crystal is held in this gap, and the first A liquid crystal display device, characterized in that, at least in a bonded portion on a substrate, a dummy wiring unrelated to the electrical connection passing through the bonded portion is formed.
成されてなることを特徴とする特許請求の範囲第1項記
載の液晶表示装置。(2) The liquid crystal display device according to claim 1, wherein dummy wiring is formed at the corners of the first and second substrates.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61170125A JP2502529B2 (en) | 1986-07-18 | 1986-07-18 | Liquid crystal display |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61170125A JP2502529B2 (en) | 1986-07-18 | 1986-07-18 | Liquid crystal display |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6326631A true JPS6326631A (en) | 1988-02-04 |
JP2502529B2 JP2502529B2 (en) | 1996-05-29 |
Family
ID=15899107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61170125A Expired - Lifetime JP2502529B2 (en) | 1986-07-18 | 1986-07-18 | Liquid crystal display |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2502529B2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01155022U (en) * | 1988-04-11 | 1989-10-25 | ||
JPH0682811A (en) * | 1992-07-15 | 1994-03-25 | Toshiba Corp | Liquid crystal display device |
US7142273B1 (en) | 1996-06-25 | 2006-11-28 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display panel with a laminating structure containing a semiconductor layer located under the seal |
US7298447B1 (en) | 1996-06-25 | 2007-11-20 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display panel |
US7333172B1 (en) | 1995-12-21 | 2008-02-19 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device having plurality of conductive layers between a substrate and sealing member and insulated by insulating film |
WO2008081710A1 (en) * | 2007-01-04 | 2008-07-10 | Nissha Printing Co., Ltd. | Protective panel having touch panel function |
JP2013200573A (en) * | 2013-06-05 | 2013-10-03 | Semiconductor Energy Lab Co Ltd | Liquid crystal display device |
JP2014132356A (en) * | 2014-02-26 | 2014-07-17 | Semiconductor Energy Lab Co Ltd | Liquid crystal display device |
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JPS5778517A (en) * | 1980-11-04 | 1982-05-17 | Seiko Instr & Electronics Ltd | Liquid crystal panel |
JPS5834488A (en) * | 1981-08-26 | 1983-02-28 | 株式会社リコー | Liquid crystal display |
JPS58220176A (en) * | 1982-06-17 | 1983-12-21 | シャープ株式会社 | Liquid crystal display |
JPS62205320A (en) * | 1986-03-06 | 1987-09-09 | Seiko Epson Corp | Liquid crystal display device |
JPS62245220A (en) * | 1986-04-18 | 1987-10-26 | Seiko Epson Corp | Liquid crystal display device |
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JPS5778517A (en) * | 1980-11-04 | 1982-05-17 | Seiko Instr & Electronics Ltd | Liquid crystal panel |
JPS5834488A (en) * | 1981-08-26 | 1983-02-28 | 株式会社リコー | Liquid crystal display |
JPS58220176A (en) * | 1982-06-17 | 1983-12-21 | シャープ株式会社 | Liquid crystal display |
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Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01155022U (en) * | 1988-04-11 | 1989-10-25 | ||
JPH0682811A (en) * | 1992-07-15 | 1994-03-25 | Toshiba Corp | Liquid crystal display device |
US7956978B2 (en) | 1995-12-21 | 2011-06-07 | Semiconductor Energy Laboratory Co., Ltd. | Liquid-crystal display device having a particular conductive layer |
US8194224B2 (en) | 1995-12-21 | 2012-06-05 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device having particular conductive layers |
US7333172B1 (en) | 1995-12-21 | 2008-02-19 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device having plurality of conductive layers between a substrate and sealing member and insulated by insulating film |
US7394516B2 (en) | 1995-12-21 | 2008-07-01 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device having a particular conductive layer |
US9316880B2 (en) | 1995-12-21 | 2016-04-19 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device |
US8665411B2 (en) | 1995-12-21 | 2014-03-04 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device having particular conductive layer |
US8334964B2 (en) | 1996-06-25 | 2012-12-18 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display panel |
US7990514B2 (en) | 1996-06-25 | 2011-08-02 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display panel |
US7142273B1 (en) | 1996-06-25 | 2006-11-28 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display panel with a laminating structure containing a semiconductor layer located under the seal |
US7298447B1 (en) | 1996-06-25 | 2007-11-20 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display panel |
US7667817B2 (en) | 1996-06-25 | 2010-02-23 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display panel |
US8279188B2 (en) | 2007-01-04 | 2012-10-02 | Nissha Printing Co., Ltd. | Protective panel having touch panel function |
JP5101525B2 (en) * | 2007-01-04 | 2012-12-19 | 日本写真印刷株式会社 | Protective panel with touch panel function |
WO2008081710A1 (en) * | 2007-01-04 | 2008-07-10 | Nissha Printing Co., Ltd. | Protective panel having touch panel function |
JP2013200573A (en) * | 2013-06-05 | 2013-10-03 | Semiconductor Energy Lab Co Ltd | Liquid crystal display device |
JP2014132356A (en) * | 2014-02-26 | 2014-07-17 | Semiconductor Energy Lab Co Ltd | Liquid crystal display device |
Also Published As
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JP2502529B2 (en) | 1996-05-29 |
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