JP3152587B2 - Liquid crystal panel manufacturing method - Google Patents
Liquid crystal panel manufacturing methodInfo
- Publication number
- JP3152587B2 JP3152587B2 JP16598695A JP16598695A JP3152587B2 JP 3152587 B2 JP3152587 B2 JP 3152587B2 JP 16598695 A JP16598695 A JP 16598695A JP 16598695 A JP16598695 A JP 16598695A JP 3152587 B2 JP3152587 B2 JP 3152587B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- shielding layer
- crystal panel
- substrates
- display area
- 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 - Lifetime
Links
Landscapes
- Liquid Crystal (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、液晶パネルの略全面に
わたって表示の均一化を図った液晶パネルの製造方法に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal panel in which display is made uniform over substantially the entire surface of the liquid crystal panel.
【０００２】[0002]
【従来の技術】液晶ディスプレイ装置は、液晶の初期配
向方位を液晶の異方性を利用した作用により他の配向状
態に変化させ、それに伴う光学的特性の変化を利用した
表示装置である。従来のＣＲＴ等の表示装置に比べ低電
圧駆動が可能であり、ＬＳＩ駆動に適すること、低電力
消費タイプであること、薄型、軽量化が可能であること
等から、近年大画面化、大容量化によりＯＡ機器への搭
載を目指して開発が進められ、商品化されつつある。2. Description of the Related Art A liquid crystal display device is a display device in which the initial alignment direction of a liquid crystal is changed to another alignment state by an action utilizing the anisotropy of the liquid crystal, and a change in optical characteristics accompanying the change is performed. In recent years, large screens and large capacities have been realized because they can be driven at a lower voltage than conventional display devices such as CRTs, are suitable for LSI driving, are of a low power consumption type, and can be made thinner and lighter. Due to the development, development is being pursued with the aim of mounting on OA equipment, and it is being commercialized.
【０００３】現在、液晶の電場印加による配列状態の変
化、即ち電気光学特性を利用した単純マトリックス方式
のＳＴＮ形ディスプレイが主軸であり、アクティブマト
リックス方式のＴＦＴディスプレイがこれに続く。液晶
ディスプレイは透明電極膜を形成した一対のガラス基板
間に液晶を挟んだサンドイッチタイプであり、透明電極
膜上には液晶を配向させるための高分子薄膜を形成させ
る。ＳＴＮ形ディスプレイの場合、基板間のセル厚は5
〜7μｍ程度であり、高分子薄膜上をラビングすること
で液晶の配向を制御し3〜8゜程度のプレチルト角を持た
せる。ＳＴＮ方式は液晶の複屈折性と光の旋光性を利用
したものであり、一対の基板間で液晶の配向方向を180
゜〜270゜捻ることで著しく急峻なしきい値特性を得る
ことを可能にしているため、セル厚は0.05〜0.1μｍの
精度を必要とする。At present, the main axis is a simple matrix type STN type display utilizing change in alignment state by application of an electric field of liquid crystal, that is, electro-optical characteristics, followed by an active matrix type TFT display. The liquid crystal display is a sandwich type in which liquid crystal is sandwiched between a pair of glass substrates on which a transparent electrode film is formed, and a polymer thin film for aligning the liquid crystal is formed on the transparent electrode film. In the case of STN type display, the cell thickness between substrates is 5
The orientation of the liquid crystal is controlled by rubbing on a polymer thin film to give a pretilt angle of about 3 to 8 °. The STN method utilizes the birefringence of liquid crystal and the optical rotation of light, and adjusts the orientation of liquid crystal between a pair of substrates by 180 degrees.
Since it is possible to obtain an extremely steep threshold value characteristic by twisting {-270}, the cell thickness needs an accuracy of 0.05-0.1 μm.
【０００４】液晶パネルの光学特性は、液晶分子の持つ
複屈折性、誘電率異方性等により得られるが、粘性、弾
性定数等を含め、用いる液晶材料の組成、その成分比の
調整により液晶パネルの光学特性は変化する。現在様々
な液晶材料が開発されており、液晶材料の調合により望
みの特性を得ることが可能である。最終的には液晶の持
つ複屈折率Δｎと液晶層の厚さｄの積であるΔｎｄと、
位相差フィルムによる光学補償構成の組合せによりパネ
ル特性を決定する。The optical characteristics of a liquid crystal panel can be obtained by the birefringence and dielectric anisotropy of the liquid crystal molecules. The liquid crystal material is adjusted by adjusting the composition of the liquid crystal material used, including the viscosity and elastic constant, and the component ratio thereof. The optical properties of the panel change. At present, various liquid crystal materials are being developed, and desired characteristics can be obtained by mixing liquid crystal materials. Finally, Δnd, which is the product of the birefringence Δn of the liquid crystal and the thickness d of the liquid crystal layer,
The panel characteristics are determined by the combination of the optical compensation configuration using the retardation film.
【０００５】光学特性が決定された液晶パネルの製造
は、通常、滴下工法（特開昭６３−１７９３２８号公報
に開示）或は真空注入工法により所望の液晶を基板間に
挾持させることにより行われ、特に液晶滴下法では一方
のガラス基板上にスペーサーを分散させ、数本のシリン
ダ内に用意した液晶を他方のガラス基板上に一定パルス
で滴下することにより行われる工法である。A liquid crystal panel having optical characteristics determined is usually manufactured by dropping a desired liquid crystal between substrates by a dropping method (disclosed in JP-A-63-179328) or a vacuum injection method.
Performed by 挾 lifting, method especially in a liquid crystal dripping method by dispersing spacers on one glass substrate, is carried out by dropping at a constant pulse a liquid crystal which is prepared in several cylinders other glass substrate It is.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、前記ス
ペーサーを分散した基板上に凹凸が存在する場合、スペ
ーサー径が一様であれば基板の凹凸に応じてギャップム
ラが発生する。現在のカラー液晶パネルに用いられてい
るカラーフィルターの表示エリア周辺には表示部の視認
性の向上を図るため遮光層が設けられているのが一般的
であり、これには、フィルター色の重ね合わせ、顔料、
Ｃｒ等が用いられ、これにより遮光層の部分はその厚さ
分だけ表示エリアより基板上に突出し、凸部を形成す
る。従って同一粒径のスペーサーを散布した場合、表示
エリア中央に比べその遮光層との境界部分のセル厚が厚
くなり、これが、前記のΔｎｄ差となってパネル点灯、
非点灯時に輝度ムラとして確認される。However, when unevenness is present on the substrate on which the spacers are dispersed, gap unevenness occurs depending on the unevenness of the substrate if the spacer diameter is uniform. In general, a light-shielding layer is provided around the display area of the color filter used in the current color liquid crystal panel in order to improve the visibility of the display section. Combination, pigment,
Cr or the like is used, so that the light-shielding layer portion protrudes above the display area from the display area by the thickness of the light-shielding layer to form a projection. Therefore, when spacers having the same particle size are scattered, the cell thickness at the boundary with the light-shielding layer becomes thicker than that at the center of the display area, and this becomes the above-mentioned Δnd difference, and the panel is turned on.
It is confirmed as luminance unevenness when not lit.
【０００７】本発明は、この課題を解決したものであ
り、基板上に遮光層による凹凸が存在しても、表示エリ
ア内でのセル厚差に基づく弊害、即ち、輝度ムラが発生
することを防止し、パネル面内で均一な表示ができる液
晶パネルの製造方法を提供することを目的とする。[0007] The present invention has solved this problem, even if there is unevenness due to the light shielding layer on the substrate, adverse effects based on the cell thickness difference within the display area, that is, that the luminance unevenness It is an object of the present invention to provide a method of manufacturing a liquid crystal panel which can prevent the occurrence of a liquid crystal panel and perform uniform display within the panel surface.
【０００８】[0008]
【課題を解決するための手段】本発明の液晶パネルの製
造方法は、液晶を挾持した一対の基板と、この一対の基
板の表示エリアに設けられた電極パターンと、一対の基
板の一方の基板上に他方の基板に突出するようにして、
表示エリアの周辺に形成された遮光層と、表示エリアお
よび遮光層にわたって散布された同一粒径のスペーサと
を備えた液晶パネルの製造方法であって、液晶を挾持し
た一対の基板を、紫外線硬化樹脂によりシールするシー
ル樹脂硬化工程を、一対の基板の液晶挾持面がスペーサ
を介して相互に加圧された状態下で行い、遮光層と基板
との間に介在するスペーサを圧縮された状態でシール
し、表示エリアから遮光層近傍までのセル厚みを略一定
とするものである。According to the present invention, there is provided a liquid crystal panel according to the present invention .
Granulation method, a pair of substrates by sandwiching a liquid crystal, an electrode pattern provided on Viewing area of the pair of base <br/> plate, a pair of groups
So that it protrudes from one board of the board to the other board,
A shielding layer formed in the periphery of the display area, the spacers of the same diameter which is sprayed over Viewing area and the light shielding layer
A method of manufacturing a liquid crystal panel having a liquid crystal and clamped
A pair of substrates sealed with an ultraviolet curable resin
Resin curing process, the liquid crystal sandwiching surface of a pair of substrates is a spacer
Performed under a pressurized state to each other via a seal in a state where a spacer interposed is compressed between the light-shielding layer and the substrate
And, a substantially constant cell thickness from Viewing area to the light-shielding layer near
It is assumed that .
【０００９】[0009]
【００１０】[0010]
【作用】遮光層と基板の間に介在する前記スペーサーが
圧縮された状態でシール固定されるので、パネル表示エ
リアから遮光層近傍までのセル厚みが略一定となり、ギ
ャップムラを解消することができる。The spacer interposed between the light-shielding layer and the substrate is sealed and fixed in a compressed state, so that the cell thickness from the panel display area to the vicinity of the light-shielding layer is substantially constant, and gap unevenness can be eliminated. .
【００１１】[0011]
【実施例】以下に本発明の一実施例について図面を参照
しながら説明する。図１は本発明の液晶パネルの平面
図、図２はその断面図、図３は本発明の液晶パネルの製
造方法の要部の工程を示す簡略説明図である。図１およ
び図２において、１はセグメント基板となるガラス基
板、２はコモン基板となるガラス基板で、ガラス基板１
にはセグメント透明電極パターン３，ガラス基板２には
コモン透明電極パターン４が設けられている。５はシー
ル材、６はポリイミドの配向膜で、前記ガラス基板１、
２上にフレキソ印刷法により形成され、熱硬化した後、
表面をラビングすることにより所定の配向性を得てい
る。この時、対向するガラス基板１，２間で液晶分子が
２４０゜捻れる方向に配向処理を施し、ガラス基板１に
は７．０μｍの同一粒経のスペーサー７を均一に分散さ
せる。他方のガラス基板２上には、３本のガラスシリン
ダ内に吸引したカイラル剤入りネマティック液晶８を滴
下する。この液晶のΔｎは０．１２とした。シール剤５
には紫外線（以下ＵＶと略す）硬化樹脂を使用し、予め
スペーサーを１．５ｗｔ％の割合で含有させた後、スク
リーン印刷によりスペーサー７を分散させたガラス基板
１に印刷する。なお、９は遮光層で、この配向膜６がガ
ラス基板１側へ突出することになる。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a liquid crystal panel of the present invention, FIG. 2 is a cross-sectional view thereof, and FIG. 3 is a simplified explanatory view showing main steps of a method of manufacturing a liquid crystal panel of the present invention. 1 and 2, reference numeral 1 denotes a glass substrate serving as a segment substrate, and 2 denotes a glass substrate serving as a common substrate.
Are provided with a segment transparent electrode pattern 3 and a common transparent electrode pattern 4 on the glass substrate 2. 5 is a sealing material, 6 is an alignment film of polyimide, and the glass substrate 1,
2 is formed by flexographic printing method, and after thermosetting,
A predetermined orientation is obtained by rubbing the surface. At this time, an orientation treatment is performed in a direction in which the liquid crystal molecules are twisted by 240 ° between the glass substrates 1 and 2 facing each other, and the spacers 7 having the same size of 7.0 μm are uniformly dispersed in the glass substrate 1. On the other glass substrate 2, the nematic liquid crystal 8 containing the chiral agent sucked into the three glass cylinders is dropped. Δn of this liquid crystal was set to 0.12. Sealant 5
UV light (hereinafter abbreviated as UV) curable resin is used, the spacer is previously contained at a ratio of 1.5 wt%, and then printed on the glass substrate 1 on which the spacers 7 are dispersed by screen printing. Reference numeral 9 denotes a light-shielding layer, and the alignment film 6 protrudes toward the glass substrate 1.
【００１２】次に、それらのガラス基板１，２を真空チ
ャンバー内で貼り合わせ、液晶パネル12の形にした後、
図３に示すステージ10上にこれを載置し、ＵＶマスク11
を介してその周辺部のシール部分にＵＶ照射しながら、
このＵＶ照射側と反対方向よりプレス機によりプレス板
13を加圧し、シール材５を硬化する。Next, the glass substrates 1 and 2 are bonded together in a vacuum chamber to form a liquid crystal panel 12.
This is placed on a stage 10 shown in FIG.
While irradiating UV to the peripheral seal part through
Press plate by pressing machine from the direction opposite to this UV irradiation side
13 is pressed to cure the sealing material 5.
【００１３】このシール樹脂硬化工程が本発明の骨子で
あり、このようにすると、遮光層９上のスペーサー７は
図２に７aとして示すように圧縮(潰れた)状態でシール
硬化され、表示エリア中央から遮光層境界部分に至るま
での液晶パネルのセル厚は略一定となって固定され、表
示エリアとその周辺の遮光層９の凹凸により発生してい
た境界部のギャップムラがなくなり、この部分の輝度ム
ラは全く観察されない状態となる。これに対して、通常
の手法で製造した液晶パネルを用い、境界部に発生する
輝度ムラを同じ輝度が得られる電圧差として測定した結
果、スタティック波形（周波数64Ｈｚの矩形波）による
しきい値電圧（最大透過率を100％とした時の透過率10
％となる電圧）差としては0.1Ｖの輝度ムラであった。This sealing resin curing step is the essence of the present invention. In this case, the spacer 7 on the light shielding layer 9 is sealed and cured in a compressed (crushed) state as shown by 7a in FIG. The cell thickness of the liquid crystal panel from the center to the boundary of the light-shielding layer is substantially constant and fixed, and the gap unevenness at the boundary caused by the unevenness of the display area and the light-shielding layer 9 therearound is eliminated. Is not observed at all. On the other hand, using a liquid crystal panel manufactured by a normal method, the luminance unevenness generated at the boundary was measured as a voltage difference that can obtain the same luminance, and as a result, the threshold voltage was determined by a static waveform (a rectangular wave having a frequency of 64 Hz). (Transmittance 10 when maximum transmittance is 100%
%), Which was a luminance unevenness of 0.1 V.
【００１４】なお、本実施例はＳＴＮ形のパネルについ
て説明したが、ＴＦＴ形のパネルについても適用できる
ものである。Although the embodiment has been described with reference to the STN type panel, the present invention can be applied to a TFT type panel.
【００１５】[0015]
【発明の効果】本発明の液晶パネルの製造方法によれ
ば、液晶パネルをシールするシール樹脂硬化工程を、液
晶パネルを構成する基板の液晶挾持面がスペーサを介し
て相互に加圧された状態下で行うことにより、表示エリ
アとその周辺の遮光層との凹凸により発生していた輝度
ムラの無い均一な液晶パネルを製造することが可能であ
る。 According to the method of manufacturing a liquid crystal panel of the present invention.
For example, by performing the sealing resin curing step of sealing the liquid crystal panel while the liquid crystal holding surfaces of the substrates constituting the liquid crystal panel are mutually pressed through the spacer, the display area and the surrounding light-shielding layer are formed. it Ru can der <br/> to produce a uniform liquid crystal panel without luminance unevenness was generated by unevenness of.
【図１】本発明の一実施例における液晶パネルの平面図
である。1 is a plan view of a liquid crystal panel in this onset Ming embodiment.
【図２】本発明の一実施例における液晶パネルの断面図
である。It is a sectional view of a liquid crystal panel in Fig. 2 this onset Ming embodiment.
【図３】本発明の液晶パネルの製造方法の要部の製造工
程を示す簡略説明図である。FIG. 3 is a simplified explanatory view showing a main part of a manufacturing method of a liquid crystal panel manufacturing method of the present invention.
１…セグメント基板となるガラス基板、 ２…コモン基
板となるガラス基板、３…セグメント透明電極パター
ン、 ４…コモン透明電極パターン、 ５…シール材、
６…配向膜、 ７…スペーサー、 ８…液晶、 ９…
遮光層、１０…ＵＶ照射ステージ、 １１…ＵＶマス
ク、 １２…液晶パネル、 １３…プレス板。DESCRIPTION OF SYMBOLS 1 ... Glass substrate used as a segment substrate, 2 ... Glass substrate used as a common substrate, 3 ... Segment transparent electrode pattern, 4 ... Common transparent electrode pattern, 5 ... Seal material,
6: alignment film, 7: spacer, 8: liquid crystal, 9:
Light shielding layer, 10 ... UV irradiation stage, 11 ... UV mask, 12 ... Liquid crystal panel, 13 ... Press plate.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮田 慎一 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 平７−20475（ＪＰ，Ａ) 特開 平５−303101（ＪＰ，Ａ) 実開 平５−45648（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02F 1/1339 500 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shinichi Miyata 1006 Kazuma Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-7-20475 (JP, A) JP-A-5- 303101 (JP, A) Japanese Utility Model Hei 5-45648 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) G02F 1/1339 500
Claims (1)
基板の表示エリアに設けられた電極パターンと、前記一
対の基板の一方の基板上に他方の基板に突出するように
して、前記表示エリアの周辺に形成された遮光層と、前
記表示エリアおよび前記遮光層にわたって散布された同
一粒径のスペーサとを備えた液晶パネルの製造方法であ
って、前記液晶を挾持した前記一対の基板を、紫外線硬化樹脂
によりシールするシール樹脂硬化工程を、前記一対の基
板の液晶挾持面がスペーサを介して相互に加圧された状
態下で行い、 前記遮光層と前記基板との間に介在する前
記スペーサを圧縮された状態でシールし、前記表示エリ
アから前記遮光層近傍までのセル厚みを略一定とするこ
とを特徴とする液晶パネルの製造方法。 A pair of substrates claim 1 was sandwiched a liquid crystal, an electrode pattern provided on the display area of the pair of <br/> substrates, the one
So that it protrudes from one of the substrates to the other
To a light shielding layer formed around the front Symbol Display area, before
A method for manufacturing a liquid crystal panel comprising a display area and spacers having the same particle size dispersed over the light-shielding layer , wherein the pair of substrates sandwiching the liquid crystal is made of an ultraviolet curable resin.
The sealing resin curing step of sealing with the pair of bases
The liquid crystal holding surface of the plate is mutually pressed through the spacer
Performed under condition, substantially constant and to Rukoto the spacer was sealed in a state of being compressed, the cell thickness from the front Symbol Display area to the vicinity of the light shielding layer interposed between the substrate and the light shielding layer A method for manufacturing a liquid crystal panel , comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16598695A JP3152587B2 (en) | 1995-06-30 | 1995-06-30 | Liquid crystal panel manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16598695A JP3152587B2 (en) | 1995-06-30 | 1995-06-30 | Liquid crystal panel manufacturing method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30216399A Division JP3244079B2 (en) | 1999-01-01 | 1999-10-25 | Liquid crystal panel and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0915610A JPH0915610A (en) | 1997-01-17 |
| JP3152587B2 true JP3152587B2 (en) | 2001-04-03 |
Family
ID=15822758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16598695A Expired - Lifetime JP3152587B2 (en) | 1995-06-30 | 1995-06-30 | Liquid crystal panel manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3152587B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11142863A (en) * | 1997-11-13 | 1999-05-28 | Nec Corp | Liquid crystal display panel and its manufacture |
| TWI250352B (en) | 2003-09-08 | 2006-03-01 | Chunghwa Picture Tubes Ltd | Liquid crystal display panel |
| JP4500039B2 (en) * | 2003-11-28 | 2010-07-14 | オプトレックス株式会社 | LCD panel |
| CN101762910B (en) * | 2005-09-29 | 2012-06-13 | 京瓷株式会社 | Liquid crystal display panel, liquid crystal display device provided with same, and bonding substrate for liquid crystal display panel |
-
1995
- 1995-06-30 JP JP16598695A patent/JP3152587B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0915610A (en) | 1997-01-17 |
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