JP3533168B2 - Liquid crystal display panel manufacturing method - Google Patents
Liquid crystal display panel manufacturing methodInfo
- Publication number
- JP3533168B2 JP3533168B2 JP2000315619A JP2000315619A JP3533168B2 JP 3533168 B2 JP3533168 B2 JP 3533168B2 JP 2000315619 A JP2000315619 A JP 2000315619A JP 2000315619 A JP2000315619 A JP 2000315619A JP 3533168 B2 JP3533168 B2 JP 3533168B2
- Authority
- JP
- Japan
- Prior art keywords
- region
- liquid crystal
- seal
- substrate
- display panel
- 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
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- Liquid Crystal (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液晶表示パネルの
製造方法に関し、特に、表示領域の平坦性を維持して対
向する基板間に液晶を注入、封止する液晶表示パネルの
製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal display panel, and more particularly to a method for manufacturing a liquid crystal display panel in which liquid crystal is injected and sealed between opposing substrates while maintaining the flatness of a display area.
【０００２】[0002]
【従来の技術】ＡＶ機器やＯＡ機器の表示装置として、
薄型、軽量、低消費電力等の利点から液晶表示装置が広
く用いられている。この液晶表示装置は、２枚の対向す
る基板に液晶を注入し、液晶分子の配向方向を基板に設
けた電極による電界で制御し、液晶パネルに照射される
光を変調させることによって画像を表示するものであ
る。このような液晶表示装置では、近年、高精細化、大
画面化等の要求が高まりつつあり、表示の均一性を向上
させるために、対向する基板間のセルギャップの均一性
を維持しつつ液晶の注入、貼り合わせを行う方法が種々
提案されている。2. Description of the Related Art As a display device for AV equipment and OA equipment,
Liquid crystal display devices are widely used because of their advantages such as thinness, light weight, and low power consumption. This liquid crystal display device displays an image by injecting liquid crystal into two opposing substrates, controlling the alignment direction of liquid crystal molecules by an electric field generated by electrodes provided on the substrates, and modulating the light emitted to the liquid crystal panel. To do. In such a liquid crystal display device, in recent years, demands for higher definition, larger screen size, etc. are increasing, and in order to improve the display uniformity, the liquid crystal display is maintained while maintaining the cell gap uniformity between opposed substrates. Various methods for injecting and bonding are proposed.
【０００３】代表的な液晶注入法としては、対向するガ
ラス基板を液晶注入孔となる領域を除いてシール材で貼
り合わせた後、貼り合わせたガラス基板を真空容器に入
れて減圧状態にし、液晶注入孔を液晶に浸した状態で真
空容器を大気圧に戻すことにより圧力差を利用して液晶
を注入する方法や、対向するガラス基板を液晶注入孔と
排気口となる領域を除いてシール材で貼り合わせた後、
液晶注入孔を液晶に浸し、排気口から排気することによ
り液晶を吸引する方法（特開平７−２８１２００号公報
等）や、真空容器等で減圧された雰囲気中で、一方のガ
ラス基板にシール材を塗布して液晶を滴下し、他方のガ
ラス基板を貼り合わせた後、大気圧に戻してシール材を
硬化させる方法（特開平４−２８５９１０号公報等、以
下、液晶滴下法と呼ぶ。）等がある。As a typical liquid crystal injection method, glass substrates facing each other are bonded by a sealing material except for a region to be a liquid crystal injection hole, and the bonded glass substrates are put into a vacuum container to be depressurized, and the liquid crystal is A method of injecting liquid crystal by utilizing the pressure difference by returning the vacuum container to atmospheric pressure while the injection hole is immersed in the liquid crystal, or a sealing material except for the opposite glass substrate except the area that becomes the liquid crystal injection hole and the exhaust port. After pasting with
A method of sucking the liquid crystal by immersing the liquid crystal injection hole in the liquid crystal and exhausting the liquid from the exhaust port (Japanese Patent Laid-Open No. 7-281200, etc.) or a sealing material for one glass substrate in an atmosphere decompressed by a vacuum container And the liquid crystal is dropped, the other glass substrate is bonded, and then the pressure is returned to atmospheric pressure to cure the sealing material (Japanese Patent Laid-Open No. 4-285910, etc., hereinafter referred to as liquid crystal dropping method). There is.
【０００４】液晶を圧力差又は排気により注入する方法
では、液晶注入後に注入口を樹脂等により封止する必要
があり、この封止部分から液晶に気泡が混入したり、封
止材により液晶が汚染される等の問題が生じるが、液晶
滴下法は、他の方法に比べて液晶の注入時間を大幅に短
縮でき、高価な液晶の所要量を削減できることから、液
晶表示装置のコストを低減することができる方法であ
り、特に、大型サイズの液晶パネルにおいて期待されて
いる方法である。In the method of injecting liquid crystal by pressure difference or exhaust, it is necessary to seal the injection port with resin or the like after injecting the liquid crystal, and air bubbles are mixed into the liquid crystal from this sealing portion, or the liquid crystal is sealed by the sealing material. Although problems such as contamination occur, the liquid crystal dropping method can significantly reduce the liquid crystal injection time compared to other methods and can reduce the amount of expensive liquid crystal, thus reducing the cost of the liquid crystal display device. This is a method that can be used, and is particularly expected for large-sized liquid crystal panels.
【０００５】このような特開平４−２８５９１０号公報
等に記載された液晶滴下法による液晶表示パネルの製造
方法について、図８及び図９を参照して説明する。図８
は、従来の液晶滴下法で液晶を注入した後の液晶パネル
の状態を示す平面図であり、図９は、従来の液晶滴下法
による液晶の注入工程を模式的に示す工程断面図であ
る。A method of manufacturing a liquid crystal display panel by the liquid crystal dropping method described in Japanese Patent Laid-Open No. 4-285910 will be described with reference to FIGS. 8 and 9. Figure 8
FIG. 9 is a plan view showing a state of the liquid crystal panel after the liquid crystal is injected by the conventional liquid crystal dropping method, and FIG. 9 is a process cross-sectional view schematically showing a liquid crystal injection step by the conventional liquid crystal dropping method.
【０００６】まず、図９（ａ）に示すように、減圧され
た真空容器等の中で、表面に配向処理が施された第１の
ガラス基板１上に、スクリーン印刷法やディスペンサ描
画法等によって紫外線硬化樹脂等からなるシール材を塗
布し、液晶パネルの表示領域５を囲む本シール３と、本
シール３の外側を所定の間隔で囲み減圧領域６を形成す
る補助シール４とを形成する。この時、本シール３と補
助シール４は各々切れ目なく、閉じた領域を形成するよ
うに塗布する。First, as shown in FIG. 9A, a screen printing method, a dispenser drawing method, or the like is performed on the first glass substrate 1 whose surface has been subjected to an orientation treatment in a depressurized vacuum container or the like. A sealing material made of an ultraviolet curable resin or the like is applied to form a main seal 3 that surrounds the display area 5 of the liquid crystal panel, and an auxiliary seal 4 that surrounds the outside of the main seal 3 at a predetermined interval to form a depressurized area 6. . At this time, the main seal 3 and the auxiliary seal 4 are applied so as to form a closed region without a break.
【０００７】次に、減圧雰囲気下において、本シール３
で囲まれた表示領域５に液晶滴下用ディスペンサ９等を
用いて液晶２を適量滴下した後、ポリマービーズ、シリ
カビーズ等のスペーサを介して第２の基板１０を位置合
わせした後、両基板間のセルギャップが所定の値となる
ように加重を加え、本シール３及び補助シール４を潰し
て貼り合わせを行う（図９（ｂ）、（ｃ）参照）。Next, in a reduced pressure atmosphere, the main seal 3
After an appropriate amount of the liquid crystal 2 is dropped onto the display area 5 surrounded by the liquid crystal dispenser 9 or the like, the second substrate 10 is aligned with a spacer such as polymer beads or silica beads, and then the two substrates are aligned. A weight is applied so that the cell gap becomes a predetermined value, and the main seal 3 and the auxiliary seal 4 are crushed and bonded (see FIGS. 9B and 9C).
【０００８】その後、図９（ｄ）に示すように、真空容
器を大気圧の状態に戻し、本シール３と補助シール４と
の間に形成された減圧領域６において大気圧との圧力差
によって両基板を引きつけて本シール３と補助シール４
とを更に潰して所望のギャップを形成した後、本シール
３及び補助シール４を完全に硬化させて液晶を封入した
後、本シール３の外側の所定の部分でガラス基板を切断
して液晶表示パネルを得る。After that, as shown in FIG. 9 (d), the vacuum container is returned to the atmospheric pressure state, and in the pressure reducing region 6 formed between the main seal 3 and the auxiliary seal 4, the pressure difference from the atmospheric pressure is applied. Main board 3 and auxiliary seal 4 by attracting both substrates
After further crushing and forming a desired gap, the main seal 3 and the auxiliary seal 4 are completely cured to enclose the liquid crystal, and then the glass substrate is cut at a predetermined portion outside the main seal 3 to display the liquid crystal. Get the panel.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、上述し
た従来の液晶パネルの製造方法では、本シール３と補助
シール４とで囲まれた減圧領域６では、大気圧との圧力
差によってガラス基板の両外側から強い押圧力が加わる
ため、図９（ｄ）に示すように、本シール３近傍の表示
領域５外周部では、減圧領域６で基板が窪む反動で逆に
ガラス基板が隆起する方向に変形し、表示領域５外周で
セルギャップが大きくなってしまい、液晶パネルのギャ
ップの均一性が損なわれてしまうという問題が生じる。However, in the above-described conventional method for manufacturing a liquid crystal panel, in the depressurized region 6 surrounded by the main seal 3 and the auxiliary seal 4, both of the glass substrates are affected by the pressure difference from the atmospheric pressure. Since a strong pressing force is applied from the outside, as shown in FIG. 9D, in the outer peripheral portion of the display area 5 near the main seal 3, the glass substrate is bulged in the opposite direction due to the recoil of the substrate in the depressurized area 6. There is a problem in that the cell gap is deformed and the cell gap becomes large at the outer periphery of the display region 5, and the uniformity of the gap of the liquid crystal panel is impaired.
【００１０】この問題を解決するためには、減圧領域を
なくすか、又は減圧の程度を少なくすればよいが、減圧
領域をなくすと、図９（ｃ）に示す貼り合わせ工程で最
終的なギャップにしなければならず、かなりの大加重で
加圧する必要があり、加圧時に液晶が漏れ出たり、貼り
合わせてからシール材が本硬化するまでの基板保持が不
安定になるという問題が生じ、また、減圧の程度を弱く
すると液晶内に気泡が入り込みやすくなるという問題が
生じる。In order to solve this problem, the reduced pressure area may be eliminated or the degree of reduced pressure may be reduced. However, if the reduced pressure area is eliminated, the final gap in the bonding step shown in FIG. It is necessary to pressurize with a considerably large load, liquid crystal leaks during pressurization, and there is a problem that the substrate holding from the bonding until the seal material is fully cured becomes unstable, Further, if the degree of pressure reduction is weakened, there arises a problem that bubbles easily enter the liquid crystal.
【００１１】また、特開平１１−３２６９２２号公報に
は、本シール３と補助シール４との間隔を２ｍｍ〜７ｍ
ｍの範囲に設定し、液晶表示パネルの隆起を抑制する方
法が開示されているが、シール材はディスペンサ等によ
って塗布され、また、対向する基板の接着力を高めるた
めにシール材は加圧状態で大きく潰されてしまうため、
その間隔を正確に制御することは難しく、シール材の塗
布位置の微妙なずれによって液晶表示パネルの基板表面
に凹凸が生じてしまう。Further, in Japanese Patent Laid-Open No. 11-326922, the distance between the main seal 3 and the auxiliary seal 4 is 2 mm to 7 m.
A method of suppressing the protrusion of the liquid crystal display panel by setting it in the range of m is disclosed. However, the sealing material is applied by a dispenser or the like, and the sealing material is in a pressurized state in order to increase the adhesive force between the substrates facing each other. Because it will be crushed by
It is difficult to control the distance accurately, and the substrate surface of the liquid crystal display panel becomes uneven due to a slight deviation of the application position of the sealing material.
【００１２】本発明は、上記問題点に鑑みてなされたも
のであって、その主たる目的は、表示領域周囲の基板の
隆起を抑制することができる液晶表示パネルの製造方法
を提供することにある。The present invention has been made in view of the above problems, and a main object of the present invention is to provide a method of manufacturing a liquid crystal display panel capable of suppressing the protrusion of the substrate around the display area. .
【００１３】[0013]
【問題を解決するための手段】上記目的を達成するた
め、本発明は、対向する２枚の基板を有し、一側の基板
にシール材を配設し、液晶を滴下した後、所定の減圧状
態で他側の基板を貼り合わせて液晶を封止する液晶表示
パネルの製造方法において、前記シール材を配設するに
際し、前記一側の基板に設けられた表示領域を包囲する
ように第１のシールとなる前記シール材を配設すると共
に、開口部となる領域を除いて前記第１のシールの外側
に所定の間隔で第２のシールとなる前記シール材を二重
に配設し、前記二重の第２のシールを前記開口部におい
て互いに連結することにより、前記第１のシールで包囲
される前記表示領域と前記第２のシールで包囲される第
１の領域との間に、前記第１のシールと内側の前記第２
のシールとで囲まれ、前記開口部で外部と繋がる第２の
領域を設け、前記第１のシールで囲まれた領域に液晶を
滴下し、前記所定の減圧状態で前記他側の基板を貼り合
わせて前記第１の領域を減圧封止した後、前記貼り合わ
せた基板を大気圧状態に曝すことにより、前記表示領域
から所定の距離だけ離間した前記第１の領域において、
大気圧との圧力差に応じた力で前記対向する基板を両外
側から押圧し、該押圧により生じる前記基板の変形を前
記第２の領域により緩和するものである。To achieve the above object, the present invention has two substrates facing each other, a sealing material is provided on one substrate, and a predetermined amount of liquid crystal is dropped. In a method for manufacturing a liquid crystal display panel, in which a substrate on the other side is bonded under a reduced pressure to seal a liquid crystal, when disposing the sealing material, it is preferable that the display area provided on the substrate on the one side is surrounded. The seal material serving as the first seal is disposed, and the seal material serving as the second seal is doubly disposed at a predetermined interval outside the first seal except for the region serving as the opening. , By connecting the double second seals to each other in the opening, between the display region surrounded by the first seal and the first region surrounded by the second seal. , The first seal and the second inner seal
A second region which is surrounded by the seal and which is connected to the outside at the opening, liquid crystal is dropped in the region surrounded by the first seal, and the substrate on the other side is attached under the predetermined reduced pressure state. In addition, after the first region is vacuum-sealed together, the bonded substrate is exposed to an atmospheric pressure state, whereby in the first region separated from the display region by a predetermined distance,
The opposing substrates are pressed from both outer sides by a force corresponding to the pressure difference from the atmospheric pressure, and the deformation of the substrates caused by the pressing is alleviated by the second region.
【００１４】また、本発明は、対向する２枚の基板を有
し、一側の基板にシール材を配設し、液晶を滴下した
後、所定の減圧状態で他側の基板を貼り合わせて液晶を
封止する液晶表示パネルの製造方法において、前記シー
ル材を配設するに際し、前記一側の基板に設けられた表
示領域を包囲するように第１のシールとなる前記シール
材を配設すると共に、開口部となる領域を除いて前記第
１のシールの外側に所定の間隔で第２のシールとなる前
記シール材を二重に配設し、前記二重の第２のシールを
前記開口部において互いに連結することにより、前記第
１のシールで包囲される前記表示領域と前記第２のシー
ルで包囲される第１の領域との間に、前記第１のシール
と内側の前記第２のシールとで囲まれ、前記開口部が形
成された第２の領域を設け、前記第１のシールで囲まれ
た領域に液晶を滴下し、前記所定の減圧状態で前記他側
の基板を貼り合わせて前記第１の領域を第１の減圧状態
で封止した後、前記貼り合わせた基板を第２の減圧状態
下に置き、前記開口部を封止することで前記第２の領域
を第２の減圧状態で封止し、その後、前記貼り合わせた
基板を大気圧状態に曝すことにより、前記第１の領域及
び前記第２の領域の各々において、大気圧との圧力差に
応じた力で前記対向する基板を両外側から押圧し、前記
第１の領域における押圧により生じる前記基板の変形を
前記第２の領域により緩和するものである。Further, according to the present invention, two substrates facing each other are provided, a sealing material is provided on one substrate, liquid crystal is dropped, and then the other substrate is bonded under a predetermined reduced pressure. In a method of manufacturing a liquid crystal display panel for sealing liquid crystal, when disposing the sealing material, the sealing material serving as a first seal is disposed so as to surround a display area provided on the one side substrate. In addition, the sealing material that serves as the second seal is doubly arranged outside the first seal at a predetermined interval except for the area that serves as the opening, and the double second seal is provided as described above. By connecting to each other at the opening, the first seal and the inner first seal are provided between the display region surrounded by the first seal and the first region surrounded by the second seal. A second region surrounded by the second seal and having the opening formed therein Liquid crystal is provided in a region surrounded by the first seal, and the substrate on the other side is attached in the predetermined reduced pressure state to seal the first region in the first reduced pressure state, The bonded substrate is placed under a second depressurized state, the opening is sealed to seal the second region in the second depressurized state, and then the bonded substrate is at atmospheric pressure. By exposing to the state, in each of the first region and the second region, the opposing substrates are pressed from both outer sides by a force corresponding to the pressure difference from the atmospheric pressure, and the pressing in the first region is performed. The deformation of the substrate caused by the above is alleviated by the second region.
【００１５】本発明においては、前記第２の領域内部の
圧力が、大気圧より小さく、前記第１の領域内部の圧力
より大きい所定の圧力に設定されることが好ましい。 In the present invention, the inside of the second region is
The pressure is less than atmospheric pressure and the pressure inside the first region is
It is preferable that the pressure is set to a larger predetermined value.
【００１６】また、本発明においては、前記所定の圧力
が、前記第１の領域における押圧力によって前記基板が
窪む反動で、前記第１の領域周囲の前記基板に生じる隆
起を抑制可能な圧力に設定されている構成とすることが
できる。 Further, in the present invention, the predetermined pressure is
However, the pressing force in the first area causes the substrate to
Recesses that occur in the substrate around the first region due to the recoil.
It is possible to have a configuration in which the pressure is set to suppress
it can.
【００１７】また、本発明においては、前記第２の領域
の幅が、前記第１の領域における押圧力によって前記基
板が窪む反動で、前記第１の領域周囲の前記基板に生じ
る隆起領域の幅より大きく設定されている構成とするこ
とができる。 Further, in the present invention, the second region
The width of the base is determined by the pressing force in the first region.
The recoil of the plate causes a reaction in the substrate around the first area.
The width of the raised area must be set larger than
You can
【００１８】また、本発明においては、前記開口部が、
前記表示領域の対角線延長上近傍を除く領域に形成され
ている構成とすることもできる。 Further , in the present invention, the opening is
It is formed in an area excluding the vicinity of the diagonal extension of the display area.
It is also possible to have a configuration that has.
【００１９】このように、本発明は上記構成により、二
重の第２のシールで囲まれた減圧領域で対向する２枚の
基板を確実に貼り合わせると共に、第１のシールと第２
のシールとで囲まれた領域で基板の隆起を吸収すること
によって表示領域での基板の平坦性を確保することがで
きる。As described above, according to the present invention, the two substrates facing each other in the depressurized area surrounded by the double second seal are securely bonded to each other by the above structure, and the first seal and the second seal are provided.
The flatness of the substrate in the display region can be ensured by absorbing the protrusion of the substrate in the region surrounded by the seal.
【００２０】[0020]
【発明の実施の形態】本発明に係る液晶表示パネルの製
造方法は、その好ましい一実施の形態において、第１の
ガラス基板１に、表示領域５を包囲する本シール３と、
その外側の開口部８を除く領域に二重の補助シール４を
形成し、二重の補助シールを開口部８において互いに連
結して、二重の補助シール４で閉ざされる減圧領域６
と、本シール３と補助シール４とで囲まれる大気領域７
とを設け、所定の減圧状態で第２のガラス基板１０を貼
り合わせて減圧領域６を減圧封止した後、貼り合わせた
基板を大気圧状態に曝し、減圧領域６で大気圧との圧力
差により対向する基板を両外側から押圧するものであ
り、減圧領域６における押圧力で基板が窪む反動により
減圧領域６周囲の基板が隆起する領域が大気領域７内に
止まり、表示領域５では基板の平坦性が確保される。BEST MODE FOR CARRYING OUT THE INVENTION In a preferred embodiment of the method for manufacturing a liquid crystal display panel according to the present invention, a first glass substrate 1 is provided with a main seal 3 surrounding a display region 5,
A double auxiliary seal 4 is formed in a region excluding the opening 8 on the outer side thereof, and the double auxiliary seals are connected to each other at the opening 8 to form a decompression region 6 closed by the double auxiliary seal 4.
And the atmospheric region 7 surrounded by the main seal 3 and the auxiliary seal 4.
Are provided, the second glass substrate 10 is bonded in a predetermined depressurized state and the depressurized area 6 is depressurized and sealed, and then the bonded substrates are exposed to an atmospheric pressure state, and the pressure difference from the atmospheric pressure in the depressurized area 6 is exposed. The opposing substrates are pressed from both sides by the pressing force in the depressurization region 6, and the region around the depressurization region 6 where the substrate is raised stops in the atmosphere region 7 due to the recoil of the substrate. Flatness is secured.
【００２１】[0021]
【実施例】上記した本発明の実施の形態についてさらに
詳細に説明すべく、本発明の実施例について図面を参照
して説明する。EXAMPLES Examples of the present invention will be described with reference to the drawings in order to describe the above-described embodiments of the present invention in more detail.
【００２２】［実施例１］まず、本発明の第１の実施例
に係る液晶表示パネルの製造方法について、図１乃至図
４を参照して説明する。図１は、本発明の第１の実施例
に係る液晶表示パネルの液晶注入後の状態を示す平面図
であり、図２はその製造方法を模式的に示す工程断面図
である。又、図３及び図４は、第１の実施例の他の構造
を示す平面図である。[Embodiment 1] First, a method of manufacturing a liquid crystal display panel according to a first embodiment of the present invention will be described with reference to FIGS. 1 is a plan view showing a state after liquid crystal injection of a liquid crystal display panel according to a first embodiment of the present invention, and FIG. 2 is a process sectional view schematically showing a manufacturing method thereof. 3 and 4 are plan views showing another structure of the first embodiment.
【００２３】液晶表示パネルは、一般的に、ＴＦＴ等が
マトリクス状に形成された第１のガラス基板と、カラー
フィルター、ブラックマトリクス等が形成された第２の
ガラス基板とを有し、これらの基板の対向面には配向処
理が施された配向膜が形成されている。そして、両基板
の間に所定の形状のポリマービーズ、シリカビーズ等の
絶縁性のスペーサが配置されて所定のセルギャップが形
成され、そのギャップに注入、封止された液晶の配向方
向を少なくとも一方の基板に形成した電極による電界で
制御して画像を表示するものである。従って、表示の均
一性を向上させるためにはセルギャップを均一にする必
要があり、特に、表示領域の基板の平坦性を確保するこ
とが重要となる。ここで、図２を参照して本実施例に係
る液晶表示パネルの液晶の注入方法について説明する。A liquid crystal display panel generally has a first glass substrate on which TFTs and the like are formed in a matrix and a second glass substrate on which color filters, a black matrix and the like are formed, and these An alignment film that has been subjected to an alignment treatment is formed on the opposing surface of the substrate. An insulating spacer such as polymer beads or silica beads having a predetermined shape is arranged between the two substrates to form a predetermined cell gap, and at least one of the orientation directions of the liquid crystal injected and sealed in the gap is set. The image is displayed by controlling the electric field generated by the electrodes formed on the substrate. Therefore, in order to improve the display uniformity, it is necessary to make the cell gap uniform, and it is particularly important to ensure the flatness of the substrate in the display region. Here, a method of injecting liquid crystal of the liquid crystal display panel according to the present embodiment will be described with reference to FIG.
【００２４】まず、図２（ａ）に示すように、表面に配
向処理を施した第１のガラス基板１を真空容器等に入
れ、真空容器内部を、例えば、数Ｐａから数十Ｐａ程度
の減圧雰囲気にした後、第１のガラス基板１上に、ディ
スペンサ等を用いて紫外線硬化型樹脂等からなるシール
材を、例えば、幅０．３〜０．４ｍｍ、高さ３０〜４０
μｍ程度で塗布する。その際、第１のガラス基板１に形
成された２００ｍｍ×３００ｍｍ程度の大きさの表示領
域５を取り囲むように本シール３を塗布すると共に、本
実施例では、本シール３の外側に所定の間隔をおいて二
重に補助シール４を塗布することを特徴としている。そ
して、二重の補助シール４は図１に示す幅５ｍｍ程度の
開口部８において互いに連結され、二重の補助シール４
自体で閉じた領域が形成されるようにする。First, as shown in FIG. 2 (a), the first glass substrate 1 whose surface has been subjected to an orientation treatment is placed in a vacuum container or the like, and the inside of the vacuum container is, for example, several Pa to several tens Pa. After the reduced pressure atmosphere, a sealing material made of an ultraviolet curable resin or the like is placed on the first glass substrate 1 using a dispenser or the like, for example, a width of 0.3 to 0.4 mm and a height of 30 to 40.
Apply at about μm. At that time, the main seal 3 is applied so as to surround the display area 5 having a size of about 200 mm × 300 mm formed on the first glass substrate 1, and in the present embodiment, a predetermined space is provided outside the main seal 3. It is characterized in that the auxiliary seal 4 is double-coated with a gap. The double auxiliary seals 4 are connected to each other at the opening 8 having a width of about 5 mm shown in FIG.
Allow itself to form a closed area.
【００２５】ここで、補助シール４で囲まれる領域は、
表示領域５におけるセルギャップが所望の値となるよう
に第１のガラス基板１と第２のガラス基板１０とを押圧
するために設ける領域であるため、その領域の面積は、
表示領域の大きさ、電極端子のレイアウト、減圧の程度
等によって最適な大きさに設定されるが、例えば、外側
の補助シール４と内側の補助シール４との間隔を２０〜
３０ｍｍ程度とすると、良好に基板を押圧することがで
きる。Here, the area surrounded by the auxiliary seal 4 is
Since the area is provided to press the first glass substrate 1 and the second glass substrate 10 so that the cell gap in the display region 5 has a desired value, the area of the region is
The optimum size is set depending on the size of the display area, the layout of the electrode terminals, the degree of pressure reduction, and the like. For example, the distance between the outer auxiliary seal 4 and the inner auxiliary seal 4 is 20 to
When it is about 30 mm, the substrate can be pressed well.
【００２６】また、本シール３と補助シール４との間の
領域は、後述するように、補助シール４で囲まれる減圧
領域６が大気圧との圧力差によって押圧されて、ガラス
基板に窪みが生じる反動でその近傍のガラス基板が隆起
するという問題を回避するために設けられるものである
ため、その間隔は減圧領域６での第１のガラス基板１及
び第２のガラス基板１０の変形の度合い等によって最適
な値に設定されるが、例えば、１０〜２０ｍｍ程度に設
定するとガラス基板の隆起を本シール３と補助シール４
との間で吸収し、表示領域５での基板の平坦性を確保す
ることができる。In the area between the main seal 3 and the auxiliary seal 4, the depressurized area 6 surrounded by the auxiliary seal 4 is pressed by the pressure difference from the atmospheric pressure, as will be described later, and a depression is formed in the glass substrate. It is provided in order to avoid the problem that the glass substrate in the vicinity of the glass substrate rises due to the recoil that occurs. Therefore, the interval is the degree of deformation of the first glass substrate 1 and the second glass substrate 10 in the reduced pressure region 6. Although it is set to an optimum value depending on the setting, for example, if it is set to about 10 to 20 mm, the protrusion of the glass substrate will be set to the main seal 3 and the auxiliary seal 4.
Can be absorbed between the substrate and the substrate, and the flatness of the substrate in the display region 5 can be secured.
【００２７】次に、図２（ｂ）に示すように、減圧雰囲
気下において本シール３内部の領域に液晶滴下用ディス
ペンサ等を用いて、本シール３が潰された状態で基板間
に液晶が満たされるように適量の液晶２を滴下する。次
に、図２（ｃ）に示すように、同様に対向面に配向膜が
形成された第２のガラス基板１０を位置合わせして第１
のガラス基板１に貼り合わせる。その後、例えば、０．
１Ｎ／ｍｍ2程度の荷重を印加して本シール３及び補助
シール４を適量潰して、本シール３内面に液晶２を充満
させると共に補助シール４で囲まれた領域を密封して減
圧領域６を形成する。なお、上記工程における減圧雰囲
気の真空度、加圧の程度はシール材の潰し具合、表示領
域５の面積等に応じて適宜変更することができる。Next, as shown in FIG. 2B, a liquid crystal dropping dispenser or the like is used in a region inside the main seal 3 in a depressurized atmosphere so that the liquid crystal is applied between the substrates while the main seal 3 is crushed. An appropriate amount of liquid crystal 2 is dropped so as to be filled. Next, as shown in FIG. 2C, the second glass substrate 10 on which the alignment film is similarly formed on the opposite surface is aligned to form the first glass substrate 10.
The glass substrate 1 is attached. Then, for example, 0.
By applying a load of about 1 N / mm 2, the main seal 3 and the auxiliary seal 4 are crushed by an appropriate amount, the inner surface of the main seal 3 is filled with the liquid crystal 2, and the region surrounded by the auxiliary seal 4 is sealed to reduce the depressurized region 6. Form. The degree of vacuum and the degree of pressurization of the reduced pressure atmosphere in the above steps can be appropriately changed depending on the crushing condition of the seal material, the area of the display region 5, and the like.
【００２８】その後、真空容器内部を大気圧に戻す。す
ると、図２（ｄ）に示すように、補助シール４で囲まれ
た領域内部は減圧状態が維持されており、大気圧との差
で第１のガラス基板１及び第２のガラス基板１０を両外
側から押圧する方向に力が働き、本シール３及び補助シ
ール４が更に押し潰されて両基板のギャップが所望の
値、例えば、４〜５μｍ程度となる。その際、減圧領域
６のみ両基板が押圧されるために、減圧領域６では基板
に０．１〜０．２μｍ程度の窪みが生じる。そして、こ
の減圧領域６で基板が窪む反動で、その内側の本シール
３と補助シール４とで囲まれた大気領域７で基板が隆起
し、結果的に基板の形状は図のように波打った形状とな
る。Then, the inside of the vacuum container is returned to atmospheric pressure. Then, as shown in FIG. 2D, the reduced pressure state is maintained inside the region surrounded by the auxiliary seal 4, and the first glass substrate 1 and the second glass substrate 10 are separated by the difference from the atmospheric pressure. A force acts in a direction of pressing from both outsides, and the main seal 3 and the auxiliary seal 4 are further crushed, so that the gap between both substrates becomes a desired value, for example, about 4 to 5 μm. At that time, since both substrates are pressed only in the depressurized region 6, a depression of about 0.1 to 0.2 μm is formed in the substrate in the depressurized region 6. Then, in response to the depression of the substrate in the depressurized region 6, the substrate rises in the atmospheric region 7 surrounded by the main seal 3 and the auxiliary seal 4 inside thereof, and as a result, the substrate has a wavy shape as shown in the figure. It becomes the struck shape.
【００２９】しかしながら、この減圧領域６で基板が窪
む反動で基板が隆起する範囲は減圧領域６端部から高々
１０ｍｍ程度であり、一方、大気領域７の幅は前記した
ように１０〜２０ｍｍに設定されているため、基板の隆
起は大気領域７で完全に吸収することができ、本シール
３で囲まれた表示領域５では基板の平坦性が確保される
ことになる。その後、本シール３及び補助シール４を硬
化させ、本シール３外側の所定の部分でガラス基板を切
断して液晶表示パネルが形成される。However, the range in which the substrate is raised by the recoil of the depression in the decompression region 6 is about 10 mm at the most from the end of the decompression region 6, while the width of the atmosphere region 7 is 10 to 20 mm as described above. Since it is set, the protrusion of the substrate can be completely absorbed in the atmospheric region 7, and the flatness of the substrate is ensured in the display region 5 surrounded by the main seal 3. After that, the main seal 3 and the auxiliary seal 4 are cured, and the glass substrate is cut at a predetermined portion outside the main seal 3 to form a liquid crystal display panel.
【００３０】このように、本実施例の液晶表示パネルの
製造方法によれば、本シール３で囲まれた表示領域５
と、対向する２枚の基板を両外側から押圧するための補
助シール４で囲まれた減圧領域６との間に、外圧と同じ
圧力に維持される大気領域７が形成されるため、減圧領
域６での基板の窪みの反動による基板の隆起が大気領域
７で緩和されて表示領域５まで進行しないため、表示領
域５では基板の平坦性を確保することができる。As described above, according to the liquid crystal display panel manufacturing method of this embodiment, the display area 5 surrounded by the main seal 3 is formed.
And the decompression region 6 surrounded by the auxiliary seals 4 for pressing the two opposing substrates from both outsides, the atmosphere region 7 maintained at the same pressure as the external pressure is formed. Since the protrusion of the substrate due to the reaction of the depression of the substrate in 6 is relaxed in the atmospheric region 7 and does not proceed to the display region 5, the flatness of the substrate can be secured in the display region 5.
【００３１】なお、本実施例は、表示領域５の外側に大
気領域７を挟んで減圧領域６が形成される構成であれば
良く、補助シール４で囲まれた減圧領域６の形状は加圧
する対象である表示領域５の形状、面積等に応じて任意
に形成することができる。例えば、本シール３と補助シ
ール４とで囲まれた領域を大気圧に維持するために設け
る開口部８は、図３に示すように、表示領域５の各々の
辺の中央近傍に複数設けることもでき、また、表示領域
５の周囲に形成される電極端子のレイアウト等を勘案し
て、図４に示すように、小さい減圧領域６を複数設ける
構造とすることもできる。なお、本願発明者の実験によ
れば、開口部８を表示領域５の角部近傍に設けると押圧
力がかかりにくい表示領域５の角部でセルギャップが広
くなる傾向があるため、開口部８は表示領域５の対角線
延長上近傍を除いた領域に設けることが好ましい。In this embodiment, the decompression region 6 may be formed outside the display region 5 with the atmosphere region 7 interposed therebetween, and the decompression region 6 surrounded by the auxiliary seal 4 is pressurized. It can be arbitrarily formed according to the shape, area, etc. of the target display region 5. For example, as shown in FIG. 3, a plurality of openings 8 provided to maintain the area surrounded by the main seal 3 and the auxiliary seal 4 at the atmospheric pressure are provided near the center of each side of the display area 5. Alternatively, in consideration of the layout of the electrode terminals formed around the display area 5 and the like, as shown in FIG. 4, a plurality of small depressurized areas 6 may be provided. According to an experiment conducted by the inventor of the present application, if the opening 8 is provided in the vicinity of the corner of the display area 5, the cell gap tends to widen at the corner of the display area 5 where the pressing force is less likely to be applied. Is preferably provided in a region excluding the vicinity on the diagonal extension of the display region 5.
【００３２】［実施例２］次に、本発明の第２の実施例
に係る液晶表示パネルの製造方法について、図５及び図
６を参照して説明する。図５は、本発明の第２の実施例
に係る液晶表示パネルの液晶注入後の状態を示す平面図
であり、図６はその製造方法を模式的に示す工程断面図
である。なお、本実施例は前記した第１の実施例で示し
た本シールと補助シールとの間に形成される大気領域を
所定の真空度に減圧することによって基板の隆起を更に
抑制するものである。[Embodiment 2] Next, a method of manufacturing a liquid crystal display panel according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a plan view showing a state after liquid crystal injection of a liquid crystal display panel according to a second embodiment of the present invention, and FIG. 6 is a process sectional view schematically showing a manufacturing method thereof. In this embodiment, the atmospheric pressure formed between the main seal and the auxiliary seal shown in the first embodiment is depressurized to a predetermined degree of vacuum to further suppress the protrusion of the substrate. .
【００３３】図６を参照して本実施例に係る液晶表示パ
ネルの液晶の注入方法について説明する。まず、前記し
た第１の実施例と同様に、表面に配向処理を施した配向
膜が形成された第１のガラス基板１を真空容器等に入
れ、真空容器内部を、例えば、数Ｐａから数十Ｐａ程度
の第１の減圧雰囲気にした後、第１のガラス基板１上
に、ディスペンサ等を用いて紫外線硬化型樹脂等からな
るシール材を塗布する。その際、表示領域５を囲む本シ
ール３と、本シール３の外側に所定の間隔をおいて二重
に補助シール４とを形成し、二重の補助シール４を開口
部８において互いに連結し、二重の補助シール４自体で
閉じた領域を形成するようにする。A method of injecting liquid crystal into the liquid crystal display panel according to this embodiment will be described with reference to FIG. First, as in the case of the first embodiment described above, the first glass substrate 1 having an alignment film whose surface has been subjected to an alignment treatment is placed in a vacuum container or the like, and the inside of the vacuum container is, for example, several Pa to several Pa. After the first reduced pressure atmosphere of about 10 Pa, a sealing material made of an ultraviolet curable resin or the like is applied on the first glass substrate 1 using a dispenser or the like. At that time, a main seal 3 surrounding the display area 5 and a double auxiliary seal 4 are formed outside the main seal 3 with a predetermined interval, and the double auxiliary seals 4 are connected to each other at the opening 8. , The double auxiliary seal 4 itself forms a closed area.
【００３４】ここで、本シール３と補助シール４との間
隔、及び補助シール４同士の間隔は表示領域５の寸法、
減圧の程度、表示領域外周の電極端子のレイアウト等を
勘案して最適な値に設定されるが、前記した第１の実施
例と同様に、本シール３と補助シール４との間隔は１０
〜２０ｍｍ程度、補助シール４同士の間隔は２０〜３０
ｍｍとすることが好ましい。Here, the distance between the main seal 3 and the auxiliary seal 4 and the distance between the auxiliary seals 4 are the dimensions of the display area 5.
The optimum value is set in consideration of the degree of pressure reduction, the layout of the electrode terminals on the outer periphery of the display area, etc., but the gap between the main seal 3 and the auxiliary seal 4 is 10 as in the first embodiment.
~ 20 mm, the distance between the auxiliary seals 4 is 20-30
It is preferably mm.
【００３５】次に、図６（ｂ）に示すように、第１の減
圧状態下において本シール３内部の領域に液晶滴下用デ
ィスペンサ９等を用いて適量の液晶２を滴下した後、図
６（ｃ）に示すように、同様に対向面に配向膜が形成さ
れた第２のガラス基板１０を位置合わせして貼り合わせ
る。その後、例えば、０．１Ｎ／ｍｍ2程度の加重を印
加して本シール３及び補助シール４を適量潰して、本シ
ール３内部領域に液晶２を充満させると共に補助シール
４で囲まれた領域を密封して第１の減圧領域６ａを形成
する。Next, as shown in FIG. 6B, under the first depressurized state, an appropriate amount of the liquid crystal 2 is dropped onto the area inside the main seal 3 using the liquid crystal dropping dispenser 9 or the like, and then, as shown in FIG. As shown in (c), the second glass substrate 10 on which the alignment film is similarly formed on the opposite surface is aligned and bonded. After that, for example, a load of about 0.1 N / mm 2 is applied to crush the main seal 3 and the auxiliary seal 4 by an appropriate amount to fill the liquid crystal 2 in the inner region of the main seal 3 and the area surrounded by the auxiliary seal 4. The first depressurized area 6a is formed by sealing.
【００３６】その後、前記した第１の実施例では、真空
容器内部を大気圧に戻したが、本実施例では、図６
（ｄ）に示すように、真空容器内部を第１の減圧状態と
大気圧との間の所定の真空度に設定し、本シール３と補
助シール４とで囲まれた領域を第２の減圧状態にする。
その後、補助シール４に設けた開口部８を樹脂等で封止
して本シール３と補助シール４とで囲まれた領域を密封
することにより、本シール３と補助シール４との間の領
域と、補助シール４同士で囲まれた領域とを各々異なる
真空度の減圧状態に設定する。After that, in the first embodiment described above, the inside of the vacuum container was returned to atmospheric pressure.
As shown in (d), the inside of the vacuum container is set to a predetermined degree of vacuum between the first depressurized state and the atmospheric pressure, and the region surrounded by the main seal 3 and the auxiliary seal 4 is subjected to the second depressurization. Put in a state.
After that, the opening 8 provided in the auxiliary seal 4 is sealed with a resin or the like to seal the area surrounded by the main seal 3 and the auxiliary seal 4, so that the area between the main seal 3 and the auxiliary seal 4 is sealed. And the area surrounded by the auxiliary seals 4 is set to a depressurized state with different degrees of vacuum.
【００３７】その後、真空容器内部を大気圧に戻すと、
補助シール４で囲まれた領域６ａは第１の減圧状態が維
持され、大気圧との差によって第１のガラス基板１及び
第２のガラス基板１０を両外側から押圧する方向に力が
働き、本シール３及び補助シール４が更に潰されて両基
板のギャップが４〜５μｍ程度の所望の値となる。その
際、第１の減圧領域６ａでは基板に０．１〜０．２μｍ
程度の窪みが生じて、その反動で本シール３と補助シー
ル４とで囲まれた領域６ｂで基板が隆起しようとする
が、本シール３と補助シール４とで囲まれた領域６ｂも
第２の減圧状態に維持されているために、外圧との圧力
差によって基板の隆起が抑制され、その結果、前記した
第１の実施例よりも更に表示領域５における基板の平坦
性が保たれることになる。After that, when the inside of the vacuum container is returned to atmospheric pressure,
The first depressurized state is maintained in the region 6a surrounded by the auxiliary seal 4, and a force acts in a direction of pressing the first glass substrate 1 and the second glass substrate 10 from both outsides due to the difference from the atmospheric pressure, The main seal 3 and the auxiliary seal 4 are further crushed so that the gap between both substrates becomes a desired value of about 4 to 5 μm. At that time, in the first depressurized region 6a, the substrate has a thickness of 0.1 to 0.2 μm.
The depressions are formed to some extent, and the reaction tends to swell the substrate in the region 6b surrounded by the main seal 3 and the auxiliary seal 4, but the region 6b surrounded by the main seal 3 and the auxiliary seal 4 is also second. Since the reduced pressure state is maintained, the protrusion of the substrate is suppressed due to the pressure difference from the external pressure, and as a result, the flatness of the substrate in the display region 5 is further maintained as compared with the first embodiment described above. become.
【００３８】このように、本実施例の液晶表示パネルの
製造方法によれば、本シール３で囲まれた表示領域５
と、対向する２枚の基板を加圧するための補助シール４
で囲まれた第１の減圧領域６ａとの間に、第１の減圧領
域６ａの内圧と大気圧との間の任意の真空度に設定され
る第２の減圧領域６ｂが形成されるため、第１の減圧領
域６ａでの基板の窪みの反動による第２の減圧領域６ｂ
における基板の隆起が抑制され、表示領域では基板の平
坦性を確保することができる。As described above, according to the method of manufacturing the liquid crystal display panel of the present embodiment, the display area 5 surrounded by the main seal 3 is formed.
And an auxiliary seal 4 for pressurizing two opposing substrates.
Since the second decompression region 6b, which is set to an arbitrary vacuum degree between the internal pressure of the first decompression region 6a and the atmospheric pressure, is formed between the first decompression region 6a surrounded by Second depressurization region 6b due to reaction of depression of substrate in first depressurization region 6a
The bulging of the substrate in the above is suppressed, and the flatness of the substrate can be secured in the display region.
【００３９】なお、本実施例においては、第２の減圧領
域６ｂの圧力は、大気圧と補助シール４で囲まれる第１
の減圧領域６ａとの間の任意の値に設定されるが、その
圧力は第１の減圧領域６ａの圧力、補助シール４同士の
間隔、本シール３と補助シール４との間隔等の条件に応
じて最適な値に設定することができる。In the present embodiment, the pressure in the second depressurization region 6b is the atmospheric pressure and the first pressure surrounded by the auxiliary seal 4.
Is set to an arbitrary value with respect to the decompression region 6a, the pressure depends on conditions such as the pressure of the first decompression region 6a, the distance between the auxiliary seals 4 and the distance between the main seal 3 and the auxiliary seal 4. It can be set to an optimum value depending on the situation.
【００４０】［実施例３］次に、本発明の第３の実施例
に係る液晶表示パネルの製造方法について、図７を参照
して説明する。図７は、本発明の第３の実施例に係る液
晶表示パネルの液晶注入後の状態を示す図であり、
（ａ）は平面図、（ｂ）は断面図である。なお、本実施
例は前記した第１及び第２の実施例と異なり、補助シー
ルを一重とし、本シールと表示領域との間にマージンを
設けることによって表示領域の基板の凹凸を抑制するも
のである。[Embodiment 3] Next, a method of manufacturing a liquid crystal display panel according to a third embodiment of the present invention will be described with reference to FIG. FIG. 7 is a diagram showing a state of the liquid crystal display panel according to the third embodiment of the present invention after liquid crystal injection,
(A) is a plan view and (b) is a sectional view. Note that this embodiment is different from the above-described first and second embodiments in that the auxiliary seal is a single layer and a margin is provided between the main seal and the display area to suppress unevenness of the substrate in the display area. is there.
【００４１】本実施例に係る液晶表示パネルの液晶の注
入方法について説明すると、まず、前記した第１及び第
２の実施例と同様に、対向面に配向膜が形成された第１
のガラス基板１を真空容器等に入れ、真空容器内部を、
例えば、数Ｐａから数十Ｐａ程度の減圧雰囲気にした
後、第１のガラス基板１上に、ディスペンサ等を用いて
紫外線硬化型樹脂等からなるシール材を塗布する。その
際、第１のガラス基板１に形成された画素配列からなる
表示領域５に所定のマージンを見込んで本シール３を形
成すると共に、本シール３の外側には所定の間隔をおい
て補助シール４を一重で形成する。A method of injecting liquid crystal into the liquid crystal display panel according to this embodiment will be described. First, similarly to the first and second embodiments described above, a first alignment film is formed on the facing surface.
Put the glass substrate 1 of No. 1 into a vacuum container or the like, and
For example, after a reduced pressure atmosphere of several Pa to several tens of Pa is applied, a sealing material made of an ultraviolet curable resin or the like is applied onto the first glass substrate 1 using a dispenser or the like. At that time, the main seal 3 is formed with a predetermined margin in the display region 5 formed of the pixel array formed on the first glass substrate 1, and the auxiliary seal is provided outside the main seal 3 with a predetermined space. 4 is formed in a single layer.
【００４２】次に、減圧状態下において、本シール３内
部の領域に液晶滴下用ディスペンサ９等を用いて適量の
液晶２を滴下した後、対向面に配向膜が形成された第２
のガラス基板１０を位置合わせして貼り合わせる。その
後、０．１Ｎ／ｍｍ2程度の加重を印加して本シール３
及び補助シール４を適量潰して、本シール３内部に液晶
を充満させると共に、本シール３と補助シール４とで囲
まれた領域を密封する。Next, under reduced pressure, a suitable amount of the liquid crystal 2 is dropped onto the area inside the main seal 3 using a liquid crystal dropping dispenser 9 or the like, and then a second alignment film is formed on the opposing surface.
The glass substrate 10 is aligned and bonded. After that, apply a load of about 0.1 N / mm 2 to the main seal 3
And the auxiliary seal 4 is crushed by an appropriate amount to fill the inside of the main seal 3 with liquid crystal and to seal the area surrounded by the main seal 3 and the auxiliary seal 4.
【００４３】その後、真空容器内部を大気圧に戻すこと
により、本シール３と補助シール４とで囲まれた領域は
減圧状態が維持され、大気圧との圧力差によって第１の
ガラス基板１及び第２のガラス基板１０を両外側から押
圧する方向に力が働き、減圧領域６における基板に窪み
が生じて、その反動で本シール３内側周辺で基板が隆起
する。しかしながら、本実施例では表示領域５と本シー
ル３との間には所定のマージンが設けられているため、
基板の隆起は本シール３近傍のみに制限されて表示領域
５までは到達しないために、表示領域５での基板の平坦
性が保たれることになる。After that, the inside of the vacuum container is returned to the atmospheric pressure, so that the region surrounded by the main seal 3 and the auxiliary seal 4 is kept in a reduced pressure state, and the pressure difference from the atmospheric pressure causes the first glass substrate 1 and A force acts in a direction of pressing the second glass substrate 10 from both outsides, and a depression is formed in the substrate in the depressurized region 6, and the reaction raises the substrate around the inside of the main seal 3. However, in this embodiment, since a predetermined margin is provided between the display area 5 and the main sticker 3,
Since the protrusion of the substrate is limited only to the vicinity of the main seal 3 and does not reach the display region 5, the flatness of the substrate in the display region 5 is maintained.
【００４４】このように、本実施例の液晶表示パネルの
製造方法によれば、本シール３を表示領域５の外側に所
定のマージンを見込んで大きく形成することにより、本
シール３と補助シール４とで囲まれる減圧領域６での基
板の窪みの反動による基板の隆起をマージンの部分で緩
和することができ、表示領域５では基板の平坦性を確保
することができる。As described above, according to the method of manufacturing the liquid crystal display panel of the present embodiment, the main seal 3 is formed outside the display region 5 to be large in size with a predetermined margin, so that the main seal 3 and the auxiliary seal 4 are formed. The bulge of the substrate due to the reaction of the depression of the substrate in the reduced pressure region 6 surrounded by can be relaxed in the margin portion, and the flatness of the substrate can be secured in the display region 5.
【００４５】なお、本実施例における、表示領域５と本
シール３との間隔は、本シール３と補助シール４とで囲
まれる減圧領域６の真空度、表示領域５周囲の電極端子
レイアウト等の条件によって任意の値に変更することが
できる。また、本実施例では補助シール４は一重で形成
したが、本発明は上記実施例に限定されるものではな
く、マージンを見込んで本シール３を形成し、その周囲
に前記した第１又は第２の実施例と同様に補助シール４
を二重に形成することもできる。In the present embodiment, the distance between the display area 5 and the main seal 3 depends on the degree of vacuum in the decompression area 6 surrounded by the main seal 3 and the auxiliary seal 4, the electrode terminal layout around the display area 5, and the like. It can be changed to any value depending on the conditions. Further, although the auxiliary seal 4 is formed in a single layer in the present embodiment, the present invention is not limited to the above-mentioned embodiment, and the main seal 3 is formed in consideration of a margin, and the first or the above-mentioned first and second parts are formed around the main seal 3. Auxiliary seal 4 as in the second embodiment
Can also be doubled.
【００４６】以上説明した各実施例は、２枚の対向する
基板の間に液晶を狭持する構造の任意の液晶表示装置に
適用することができ、各々の基板に透明電極を設け、基
板間の縦方向の電界により液晶を駆動するＴＮ方式の液
晶表示装置や、一方の基板に櫛歯状の電極を設け、櫛歯
電極間の電界で液晶を駆動するＩＰＳ方式の液晶表示装
置等、どのような形式の液晶表示装置であっても適用で
きることは明らかである。Each of the embodiments described above can be applied to any liquid crystal display device having a structure in which a liquid crystal is sandwiched between two opposed substrates. Transparent electrodes are provided on each substrate, and Such as a TN type liquid crystal display device in which liquid crystal is driven by an electric field in the vertical direction, or an IPS type liquid crystal display device in which a comb-teeth-shaped electrode is provided on one substrate and the liquid crystal is driven by an electric field between the comb-teeth electrodes. It is obvious that the present invention can be applied to a liquid crystal display device of such a type.
【００４７】[0047]
【発明の効果】以上説明したように、本発明の液晶表示
パネルの製造方法によれば、滴下法による液晶注入にお
いて、表示領域の基板の平坦性を確保しつつ、セルギャ
ップを所望の値にすることができるという効果を奏す
る。As described above, according to the method of manufacturing a liquid crystal display panel of the present invention, in the liquid crystal injection by the dropping method, the flatness of the substrate in the display region is ensured and the cell gap is set to a desired value. There is an effect that can be done.
【００４８】その理由は、表示領域を囲む本シールの外
側に補助シールを二重に設け、この二重の補助シールで
包囲された領域内部を減圧状態にし、かつ、本シールと
補助シールとで囲まれた領域を大気圧又は減圧状態にす
ることによって、補助シールで囲まれた領域で確実に基
板を押圧すると共に、補助シール領域で基板が窪む反動
で生じる基板の隆起を、本シールと補助シールとで囲ま
れた領域で緩和することができるからである。The reason is that a double auxiliary seal is provided outside the main seal surrounding the display area, the inside of the area surrounded by the double auxiliary seal is depressurized, and the main seal and the auxiliary seal are separated. By making the enclosed area at atmospheric pressure or reduced pressure, the substrate is surely pressed in the area surrounded by the auxiliary seal, and the protrusion of the substrate caused by the recoil of the substrate in the auxiliary seal area is defined as the main seal. This is because it can be relaxed in the area surrounded by the auxiliary seal.
【００４９】また、表示領域にマージンを見込んで本シ
ールを形成し、その外側に一重又は二重の補助シールを
設け、本シールと補助シールとの間、又は補助シール同
士の間を減圧状態にして基板を押圧し、その反動で生じ
る基板の隆起を表示領域と本シールとの間に設けたマー
ジン部分で緩和することによって表示領域の基板の平坦
性を確保することができるからである。Further, a main seal is formed with a margin in the display area, and a single or double auxiliary seal is provided on the outside thereof to reduce the pressure between the main seal and the auxiliary seals or between the auxiliary seals. This is because the flatness of the substrate in the display area can be ensured by pressing the substrate with the use of the substrate and relieving the bulge of the substrate caused by the reaction in the margin portion provided between the display area and the main seal.
【図１】本発明の第１の実施例に係る液晶表示パネルの
液晶注入後における状態を示す平面図である。FIG. 1 is a plan view showing a state of a liquid crystal display panel according to a first embodiment of the present invention after liquid crystal injection.
【図２】本発明の第１の実施例に係る液晶表示パネルの
液晶注入工程を模式的に示す断面図である。FIG. 2 is a cross-sectional view schematically showing a liquid crystal injection process of the liquid crystal display panel according to the first embodiment of the present invention.
【図３】本発明の第１の実施例に係る液晶表示パネルの
他の形態を示す平面図である。FIG. 3 is a plan view showing another form of the liquid crystal display panel according to the first embodiment of the present invention.
【図４】本発明の第１の実施例に係る液晶表示パネルの
他の形態を示す平面図である。FIG. 4 is a plan view showing another mode of the liquid crystal display panel according to the first embodiment of the present invention.
【図５】本発明の第２の実施例に係る液晶表示パネルの
液晶注入後における状態を示す平面図である。FIG. 5 is a plan view showing a state after liquid crystal injection of the liquid crystal display panel according to the second embodiment of the present invention.
【図６】本発明の第２の実施例に係る液晶表示パネルの
液晶注入工程を模式的に示す断面図である。FIG. 6 is a sectional view schematically showing a liquid crystal injection process of a liquid crystal display panel according to a second embodiment of the present invention.
【図７】本発明の第３の実施例に係る液晶表示パネルの
液晶注入後における状態を示す図であり、（ａ）は平面
図、（ｂ）は断面図である。FIG. 7 is a diagram showing a state after liquid crystal injection of a liquid crystal display panel according to a third embodiment of the present invention, (a) is a plan view and (b) is a sectional view.
【図８】従来の液晶表示パネルの液晶注入後における状
態を示す平面図である。FIG. 8 is a plan view showing a state of a conventional liquid crystal display panel after liquid crystal injection.
【図９】従来の液晶表示パネルの液晶注入工程を模式的
に示す断面図である。FIG. 9 is a cross-sectional view schematically showing a liquid crystal injection process of a conventional liquid crystal display panel.
１ 第１のガラス基板 ２ 液晶 ３ 本シール ４ 補助シール ５ 表示領域 ６ 減圧領域 ６ａ 第１の減圧領域 ６ｂ 第２の減圧領域 ７ 大気領域 ８ 開口部 ９ 液晶滴下用ディスペンサ １０ 第２のガラス基板 １１ 封止材 1 First glass substrate 2 liquid crystal 3 sticker 4 auxiliary seals 5 display area 6 decompression area 6a First decompression area 6b Second decompression area 7 Atmosphere 8 openings 9 Liquid crystal dispensing dispenser 10 Second glass substrate 11 Sealant
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G02F 1/13 - 1/141 Front page continuation (58) Fields surveyed (Int.Cl. 7 , DB name) G02F 1/13-1/141
Claims (6)
シール材を配設し、液晶を滴下した後、所定の減圧状態
で他側の基板を貼り合わせて液晶を封止する液晶表示パ
ネルの製造方法において、 前記シール材を配設するに際し、前記一側の基板に設け
られた表示領域を包囲するように第１のシールとなる前
記シール材を配設すると共に、開口部となる領域を除い
て前記第１のシールの外側に所定の間隔で第２のシール
となる前記シール材を二重に配設し、前記二重の第２の
シールを前記開口部において互いに連結することによ
り、前記第１のシールで包囲される前記表示領域と前記
第２のシールで包囲される第１の領域との間に、前記第
１のシールと内側の前記第２のシールとで囲まれ、前記
開口部で外部と繋がる第２の領域を設け、 前記第１のシールで囲まれた領域に液晶を滴下し、前記
所定の減圧状態で前記他側の基板を貼り合わせて前記第
１の領域を減圧封止した後、前記貼り合わせた基板を大
気圧状態に曝すことにより、前記表示領域から所定の距
離だけ離間した前記第１の領域において、大気圧との圧
力差に応じた力で前記対向する基板を両外側から押圧
し、該押圧により生じる前記基板の変形を前記第２の領
域により緩和することを特徴とする液晶表示パネルの製
造方法。1. A liquid crystal is sealed by arranging a sealing material on one substrate having two substrates facing each other, dropping the liquid crystal, and then bonding the other substrate under a predetermined reduced pressure condition. In the method for manufacturing a liquid crystal display panel according to claim 1, in disposing the sealing material, the sealing material serving as a first seal is disposed so as to surround a display region provided on the one side substrate, and an opening is provided. The sealing material to be the second seal is doubly arranged at a predetermined interval outside the first seal except for the region to be a part, and the double second seals are mutually provided in the opening. By connecting, the first seal and the inner second seal are provided between the display region surrounded by the first seal and the first region surrounded by the second seal. And a second region that is connected to the outside at the opening is provided. Liquid crystal is dropped in a region surrounded by the seal No. 1 and the other side substrate is bonded in the predetermined reduced pressure state to seal the first region under reduced pressure, and then the bonded substrate is in the atmospheric pressure state. By exposing the substrate to the display region by a force corresponding to the pressure difference from the atmospheric pressure in the first region separated from the display region by a predetermined distance, the opposing substrates are pressed from both outer sides, and the substrate is generated by the pressing. The method for manufacturing a liquid crystal display panel, wherein the deformation of the above is alleviated by the second region.
シール材を配設し、液晶を滴下した後、所定の減圧状態
で他側の基板を貼り合わせて液晶を封止する液晶表示パ
ネルの製造方法において、 前記シール材を配設するに際し、前記一側の基板に設け
られた表示領域を包囲するように第１のシールとなる前
記シール材を配設すると共に、開口部となる領域を除い
て前記第１のシールの外側に所定の間隔で第２のシール
となる前記シール材を二重に配設し、前記二重の第２の
シールを前記開口部において互いに連結することによ
り、前記第１のシールで包囲される前記表示領域と前記
第２のシールで包囲される第１の領域との間に、前記第
１のシールと内側の前記第２のシールとで囲まれ、前記
開口部が形成された第２の領域を設け、 前記第１のシールで囲まれた領域に液晶を滴下し、前記
所定の減圧状態で前記他側の基板を貼り合わせて前記第
１の領域を第１の減圧状態で封止した後、前記貼り合わ
せた基板を第２の減圧状態下に置き、前記開口部を封止
することで前記第２の領域を第２の減圧状態で封止し、
その後、前記貼り合わせた基板を大気圧状態に曝すこと
により、前記第１の領域及び前記第２の領域の各々にお
いて、大気圧との圧力差に応じた力で前記対向する基板
を両外側から押圧し、前記第１の領域における押圧によ
り生じる前記基板の変形を前記第２の領域により緩和す
ることを特徴とする液晶表示パネルの製造方法。2. A liquid crystal having two opposing substrates, a sealing material being provided on one substrate, dropping liquid crystal, and then bonding the other substrate under a predetermined reduced pressure to seal the liquid crystal. In the method for manufacturing a liquid crystal display panel according to claim 1, in disposing the sealing material, the sealing material serving as a first seal is disposed so as to surround a display region provided on the one side substrate, and an opening is provided. The sealing material to be the second seal is doubly arranged at a predetermined interval outside the first seal except for the region to be a part, and the double second seals are mutually provided in the opening. By connecting, the first seal and the inner second seal are provided between the display region surrounded by the first seal and the first region surrounded by the second seal. And a second region in which the opening is formed, After dropping liquid crystal into a region surrounded by the seal, the substrate on the other side is bonded in the predetermined reduced pressure state, and the first region is sealed in the first reduced pressure state, and then the bonded substrate Is placed under a second reduced pressure state, and the second region is sealed in the second reduced pressure state by sealing the opening,
Then, the bonded substrates are exposed to an atmospheric pressure state, so that in each of the first region and the second region, the opposing substrates are pressed from both outer sides with a force corresponding to a pressure difference from the atmospheric pressure. A method for manufacturing a liquid crystal display panel, comprising: pressing to reduce deformation of the substrate caused by pressing in the first region by the second region.
小さく、前記第１の領域内部の圧力より大きい所定の圧
力に設定されることを特徴とする請求項２記載の液晶表
示パネルの製造方法。3. The liquid crystal display panel according to claim 2, wherein the pressure inside the second region is set to a predetermined pressure lower than atmospheric pressure and higher than the pressure inside the first region. Manufacturing method.
る押圧力によって前記基板が窪む反動で、前記第１の領
域周囲の前記基板に生じる隆起を抑制可能な圧力に設定
されていることを特徴とする請求項３記載の液晶表示パ
ネルの製造方法。4. The predetermined pressure is set to a pressure capable of suppressing a bulge generated on the substrate around the first region due to a recoil of the substrate due to a pressing force in the first region. The method for manufacturing a liquid crystal display panel according to claim 3, wherein.
おける押圧力によって前記基板が窪む反動で、前記第１
の領域周囲の前記基板に生じる隆起領域の幅より大きく
設定されていることを特徴とする請求項１乃至４のいず
れか一に記載の液晶表示パネルの製造方法。5. The width of the second region is a reaction force that the substrate is depressed by the pressing force in the first region,
5. The method for manufacturing a liquid crystal display panel according to claim 1, wherein the width is set to be larger than the width of a raised region formed on the substrate around the region.
上近傍を除く領域に形成されていることを特徴とする請
求項１乃至５のいずれか一に記載の液晶表示パネルの製
造方法。6. The method of manufacturing a liquid crystal display panel according to claim 1, wherein the opening is formed in a region excluding the vicinity of a diagonal extension of the display region.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000315619A JP3533168B2 (en) | 2000-10-16 | 2000-10-16 | Liquid crystal display panel manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000315619A JP3533168B2 (en) | 2000-10-16 | 2000-10-16 | Liquid crystal display panel manufacturing method |
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| Publication Number | Publication Date |
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| JP3533168B2 true JP3533168B2 (en) | 2004-05-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007083412A1 (en) * | 2006-01-17 | 2007-07-26 | Sharp Kabushiki Kaisha | Liquid crystal display |
| JP2012209133A (en) * | 2011-03-30 | 2012-10-25 | Canon Inc | Airtight container, image display device, and manufacturing method thereof |
| CN104035245B (en) * | 2014-06-25 | 2017-09-01 | 成都天马微电子有限公司 | A kind of liquid crystal display panel |
| KR102472238B1 (en) | 2014-10-17 | 2022-11-28 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | Light-emitting device, module, electronic device, and method for manufacturing light-emitting device |
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