JP2000235189A - Method for regulating cell gap of display panel and cell gap regulating device - Google Patents

Method for regulating cell gap of display panel and cell gap regulating device

Info

Publication number
JP2000235189A
JP2000235189A JP11037804A JP3780499A JP2000235189A JP 2000235189 A JP2000235189 A JP 2000235189A JP 11037804 A JP11037804 A JP 11037804A JP 3780499 A JP3780499 A JP 3780499A JP 2000235189 A JP2000235189 A JP 2000235189A
Authority
JP
Japan
Prior art keywords
cell gap
liquid crystal
interference fringes
crystal panel
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.)
Pending
Application number
JP11037804A
Other languages
Japanese (ja)
Inventor
Yoshinori Shimamura
吉則 島村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP11037804A priority Critical patent/JP2000235189A/en
Publication of JP2000235189A publication Critical patent/JP2000235189A/en
Pending legal-status Critical Current

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  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

PROBLEM TO BE SOLVED: To efficiency obtain a cell gap having high uniformity. SOLUTION: A transparent gap 3 is housed into a closed pressurizing chamber 2 in the state that a liquid crystal panel 1 is held by a sealing material 5 only on the side having an injection port. The liquid crystal panel 1 is pressurized by a pressurizing means and simultaneously the light from a light source 7 is transmitted through the transparent cap 3 and is cast to the liquid crystal panel 1. Interference fringes are generated at the point of this time. A manufacture visually recognizes the interference fringes by an eyeball A through the transparent cap 3, by which the cell gap state of the liquid crystal panel 1 is detected. The pressurizing force is controlled by using a pressure control valve in the direction of decreasing the number of generation of the interference fringes, by which the cell gap is made uniform. The interference fringes described above refer to the appearance of concentric fringe patterns known as Newton rings when light is cast to adjacently opposite reflection surfaces and two beams of reflected light interfere with each other to form the bright and dark fringe patterns. The number of the interference fringes is smaller as the cell gap is more uniform.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は表示パネルのセルギ
ャップ調整方法及びセルギャップ調整装置に係わり、特
に液状表示媒体注入後セルギャップを均一に整え、注入
口を封口する方法及びその装置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 and an apparatus for adjusting a cell gap of a display panel, and more particularly to a method and an apparatus for uniformly adjusting a cell gap after filling a liquid display medium and closing an inlet. is there.

【0002】[0002]

【従来の技術】従来、液晶パネルのセルギャップを均一
にする封口方法及び装置は、特開平9−160057号
公報に記載されているように、液晶注入後のパネルを液
晶注入口が外部に露出するように加圧室に収納し、加圧
室内に高圧流体を供給し圧力を加えることによって液晶
パネルのセルギャップを均一に整え、前記液晶注入口を
封口するというものであった。
2. Description of the Related Art Conventionally, a sealing method and apparatus for making a cell gap of a liquid crystal panel uniform is disclosed in Japanese Patent Application Laid-Open No. 9-160057, in which a panel after liquid crystal injection is exposed to the outside. Thus, the liquid crystal panel is housed in a pressurized chamber, a high-pressure fluid is supplied into the pressurized chamber, and pressure is applied to uniformly adjust the cell gap of the liquid crystal panel, thereby closing the liquid crystal injection port.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記の
ような封口方法及び装置を用いて、図5に示すような液
晶パネルを製作した時、液晶パネル加圧時のセルギャッ
プ状態が不明であったため、以下のような課題があっ
た。パネル貼り合わせ前の各基板の反り量のバラツキ、
あるいは液晶注入工程までの製造工程での条件バラツキ
等によって、液晶注入口の封口工程直前でのセルギャッ
プ値はパネルごとに相違している。そのため加圧力及び
加圧時間によって、セルギャップ均一化の程度にバラツ
キが生じる。また、セルギャップ均一化の程度を一定に
保とうとすると、加圧力と加圧時間を決めるための条件
出しを繰り返す必要があり、非常に手間がかかることに
なる。なお、図5において、1は液晶パネル、21は第
1の基板、22は第2の基板、23はパネルシール剤、
24はスペーサー、25は画素電極、26は液晶層であ
る。
However, when a liquid crystal panel as shown in FIG. 5 was manufactured using the above sealing method and apparatus, the cell gap state when the liquid crystal panel was pressed was unknown. However, there were the following problems. Variation in the amount of warpage of each substrate before panel bonding,
Alternatively, the cell gap value immediately before the closing step of the liquid crystal injection port is different for each panel due to a variation in conditions in the manufacturing process up to the liquid crystal injection step. Therefore, the degree of uniformity of the cell gap varies depending on the pressing force and the pressing time. In addition, if the degree of cell gap equalization is to be kept constant, it is necessary to repeat the conditions for determining the pressing force and the pressing time, which is extremely troublesome. In FIG. 5, 1 is a liquid crystal panel, 21 is a first substrate, 22 is a second substrate, 23 is a panel sealant,
24 is a spacer, 25 is a pixel electrode, and 26 is a liquid crystal layer.

【0004】本発明は以上の課題を考慮してなされたも
ので、均一性の高いセルギャップを効率的に得る方法及
びその装置を提供することを目的とする。
The present invention has been made in view of the above problems, and has as its object to provide a method and an apparatus for efficiently obtaining a highly uniform cell gap.

【0005】[0005]

【課題を解決するための手段および作用】上記目的を達
成するために、本発明の表示パネルのセルギャップ調整
方法は、液状表示媒体が充填された表示パネルを表示媒
体注入口が外部と通じた状態で加圧室内に収納し、該加
圧室内を加圧することにより、表示パネルのセルギャッ
プを調整する方法において、加圧中の表示パネルに光を
あてて発生する干渉縞に基づいて、加圧力を制御するこ
とを特徴とする。
In order to achieve the above object, a method of adjusting a cell gap of a display panel according to the present invention is directed to a display panel filled with a liquid display medium, wherein a display medium injection port communicates with the outside. In a method of adjusting the cell gap of the display panel by pressurizing the inside of the pressurized chamber by applying pressure to the display panel under pressure, the pressurized chamber is pressurized based on interference fringes generated by irradiating the display panel with light. It is characterized by controlling the pressure.

【0006】また本発明のセルギャップ調整装置は、液
状表示媒体が充填された表示パネルを表示媒体注入口が
外部と通じた状態で加圧室内に収納し、該加圧室内を加
圧することにより、表示パネルのセルギャップを調整す
る装置において、光源と、該光源からの光を前記表示パ
ネルにあてるための光透過性蓋と、前記加圧室内の圧力
を調整する圧力調節手段と、を具備したことを特徴とす
る。
Further, the cell gap adjusting device of the present invention accommodates a display panel filled with a liquid display medium in a pressurized chamber with a display medium inlet opening to the outside, and pressurizes the pressurized chamber. A device for adjusting a cell gap of a display panel, comprising: a light source; a light-transmissive lid for directing light from the light source to the display panel; and pressure adjusting means for adjusting pressure in the pressurized chamber. It is characterized by having done.

【0007】本発明においては、液晶等の液状表示媒体
注入後のパネルを表示媒体注入口が外部と通じるよう
に、すなわちパネルの注入口のある辺以外は非接触の状
態で加圧室内に収納する。この加圧室には加圧手段と光
透過性部材の蓋と光源と加圧力調節弁を具備している。
そして表示パネルに光源からの光をあて、それによって
発生する干渉縞をもとに、干渉縞本数を減少させる方向
に加圧力を調節し、その状態で前記表示媒体注入口を封
口するものである。
In the present invention, the panel into which the liquid display medium such as liquid crystal is injected is housed in the pressurized chamber so that the display medium injection port communicates with the outside, that is, the panel is in a non-contact state except for the side where the injection port of the panel is located. I do. The pressurizing chamber is provided with a pressurizing means, a lid of a light transmitting member, a light source, and a pressure control valve.
Then, light from a light source is applied to the display panel, and based on the interference fringes generated thereby, the pressure is adjusted in a direction to reduce the number of interference fringes, and the display medium inlet is sealed in that state. .

【0008】また本発明に係わるセルギャップ調整装置
は、液晶等の液状表示媒体注入後のパネルを表示媒体注
入口が外部と通じるように、すなわちパネルの注入口の
ある辺を例えばシール材で挟み込んだ状態で加圧室内に
収納し、前記加圧室内を加圧する手段と光透過性部材の
蓋と光源と加圧力調節弁等の圧力調整手段とを備えてい
る。
In the cell gap adjusting apparatus according to the present invention, the panel into which the liquid crystal display medium such as liquid crystal is injected is connected to the outside so that the display medium injection port is connected to the outside, that is, the side of the panel where the injection port is inserted is sandwiched by, for example, a sealing material. The pressure chamber is housed in a pressurized state, and is provided with a means for pressurizing the pressure chamber, a lid of a light-transmitting member, a light source, and a pressure adjusting means such as a pressure control valve.

【0009】上記構成において、加圧室内で加圧された
表示パネルに光源で発生させた光をあてて、それによっ
て表示パネルに発生する干渉縞の発生本数を減らす方向
に加圧力を圧力調節手段で制御できるようにしたため、
表示パネルのセルギャップ状態を直接視認することがで
き、均一性の高いセルギャップを容易に得ることができ
る。
In the above structure, the light generated by the light source is applied to the display panel pressurized in the pressurizing chamber, and the pressure is adjusted in a direction to reduce the number of interference fringes generated on the display panel. Control.
The cell gap state of the display panel can be visually recognized directly, and a highly uniform cell gap can be easily obtained.

【0010】なお、液状表示媒体を用いた表示パネルと
しては、液晶パネル、エレクトロクロミックパネル等を
挙げることができる。
Note that examples of a display panel using a liquid display medium include a liquid crystal panel and an electrochromic panel.

【0011】[0011]

【実施例】以下、本発明の実施例について図面を用いて
詳細に説明する。
Embodiments of the present invention will be described below in detail with reference to the drawings.

【0012】(第1の実施例)図1は本発明の第1実施
例を示す断面図、図2は平面図である。図1及び図2に
おいて、1はセルギャップを均一化しようとする液晶充
填済みの液晶パネル、2は液晶パネル1を収納する加圧
室、3は透明蓋、4は加圧室2と透明蓋3の間を密閉す
るためのシール材、5は液晶注入口が外部と通じた状態
にするために液晶パネル1の注入口のある辺のみを挟ん
でシールするためのシール材、6は透明蓋3を固定する
ためのネジ、7は光源、8は液晶注入口を封口する封口
剤塗布手段、9は加圧エアー供給用配管継手、10は加
圧力調節弁、11は加圧室2へエアーを供給する加圧手
段である。
(First Embodiment) FIG. 1 is a sectional view showing a first embodiment of the present invention, and FIG. 2 is a plan view. 1 and 2, reference numeral 1 denotes a liquid crystal panel filled with liquid crystal for uniforming the cell gap, 2 denotes a pressurizing chamber for accommodating the liquid crystal panel 1, 3 denotes a transparent lid, and 4 denotes a pressurizing chamber 2 and a transparent lid. 3, a sealing material for sealing the space between the liquid crystal panel 1 and a sealing material for sandwiching only the side of the liquid crystal panel 1 where the liquid crystal injection port is located so that the liquid crystal injection port communicates with the outside; A screw for fixing 3, a light source 7, a sealing agent applying means 8 for sealing a liquid crystal injection port, 9 a piping joint for supplying pressurized air, 10 a pressure control valve, and 11 air to the pressurizing chamber 2 Pressurizing means for supplying the pressure.

【0013】上記構成において、液晶パネル1が注入口
12のある辺のみシール材5で挟持された状態で透明蓋
3がしめられた加圧室2内に収納され、加圧手段11に
より液晶パネル1を加圧すると同時に、光源7からの光
を透明蓋3を透過させ液晶パネル1に照射させる。この
時点で図2に示すような干渉縞Bが発生する。そして作
業者は透明蓋3を通して干渉縞Bを眼球Aにより視認す
ることにより、液晶パネル1のセルギャップ状態を検知
し、干渉縞Bの発生本数を減少させる方向に加圧力を圧
力調節弁10を用いて制御し、セルギャップの均一化を
行う。ここでいう干渉縞とは、近接した対向する反射面
に光をあてると、ニュートンリングという同心円状の縞
模様が現れるもので、2つの反射光が干渉して明暗の縞
模様となる。セルギャップが均一なほど干渉縞の本数は
少ない。
In the above configuration, the liquid crystal panel 1 is housed in the pressurized chamber 2 in which the transparent lid 3 is closed in a state where the liquid crystal panel 1 is sandwiched only by the sealing material 5 at the side where the inlet 12 is provided. Simultaneously with the pressurization of 1, the light from the light source 7 is transmitted through the transparent cover 3 to irradiate the liquid crystal panel 1. At this point, interference fringes B as shown in FIG. 2 are generated. Then, the operator visually recognizes the interference fringes B through the transparent lid 3 with the eyeball A, thereby detecting the cell gap state of the liquid crystal panel 1 and applying the pressure to the pressure adjusting valve 10 in a direction to reduce the number of the generated interference fringes B. Control to make the cell gap uniform. The interference fringe referred to here is a concentric fringe pattern called Newton's ring when light is applied to an adjacent opposing reflecting surface. Two reflected lights interfere with each other to form a bright and dark fringe pattern. The more uniform the cell gap, the smaller the number of interference fringes.

【0014】次に図3(a)のようなセルギャップが不
均一な液晶パネルを、前述の方法で図3(b)のように
均一にし、注入口12から出てきた余分な液晶13を液
晶拭き取り手段14で拭き取る。その後、図3(c)の
ように注入口12部に封口剤塗布手段8を用いて封口剤
15を塗布し封口し、液晶パネル1を完成させる。
Next, a liquid crystal panel having a non-uniform cell gap as shown in FIG. 3A is made uniform as shown in FIG. 3B by the above-described method, and extra liquid crystal 13 coming out of the injection port 12 is removed. The liquid crystal is wiped off by the liquid crystal wiping means 14. Thereafter, as shown in FIG. 3 (c), a sealing agent 15 is applied to the injection port 12 using the sealing agent applying means 8 and sealed to complete the liquid crystal panel 1.

【0015】以上述べた実施例では、作業者が干渉縞B
を計数し圧力調節弁10を調整するものであったが、作
業者の代わりに撮像素子を用い干渉縞を画像処理して、
その信号をもとに加圧力を自動調節するように自動化を
行った形態でも可能なことはいうまでもない。また、実
施例ではエアーを用いて加圧したが、エアーにかえてN
2 や水等の気流体も使用できる。また、透明蓋3にかえ
て、必要な部分のみ透明部材を使用した、窓形式にした
ものでも可能である。
In the above-described embodiment, when the operator operates the interference fringe B
Was counted and the pressure control valve 10 was adjusted, but image processing of interference fringes was performed using an image sensor instead of an operator.
It goes without saying that a form in which the pressure is automatically adjusted based on the signal is also possible. In the embodiment, the pressure is increased by using air.
Gas fluids such as 2 and water can also be used. Further, instead of the transparent cover 3, a window type using only a necessary portion of a transparent member may be used.

【0016】(第2の実施例)本実施例は、第1の実施
例での光源の位置を作業者の対向側に移して液晶パネル
からの透過光で干渉縞をみるようにした例であり、これ
を図4に示す。なお第1の実施例と同一部分についての
説明は省略する。図4において、27は光源7からの光
を透過させるための窓を備えて液晶パネル1を収納する
窓付加圧室、28は光源7からの光を単波長化(単色光
化)させるフィルターである。実施例1と同様に液晶パ
ネル1を窓付加圧室内27に収納し、加圧し光源7から
の光を窓を通して液晶パネル1にあてる。そして作業者
はその対向側でパネルからの透過光による干渉縞を眼球
Aで視認し加圧力を制御してギャップの均一化を行う。
(Second Embodiment) This embodiment is an example in which the position of the light source in the first embodiment is shifted to the side opposite to the worker so that the interference fringes can be seen by the transmitted light from the liquid crystal panel. Yes, and this is shown in FIG. The description of the same parts as in the first embodiment is omitted. In FIG. 4, reference numeral 27 denotes a window additional pressure chamber having a window for transmitting the light from the light source 7 and accommodating the liquid crystal panel 1, and 28 denotes a filter for converting the light from the light source 7 into a single wavelength (monochromatic light). is there. As in the first embodiment, the liquid crystal panel 1 is housed in the window additional pressure chamber 27, and is pressurized and the light from the light source 7 is applied to the liquid crystal panel 1 through the window. Then, on the opposite side, the operator visually recognizes the interference fringes due to the light transmitted from the panel with the eyeball A, controls the pressing force, and equalizes the gap.

【0017】以上述べた第2の実施例では、光源からの
光をフィルター28を用いて単波長化し干渉縞を見やす
いようにしたが、フィルター28のかわりに素ガラスで
もかまわない。また加圧室自体を透明材にしてもかまわ
ない。
In the second embodiment described above, the light from the light source is made to have a single wavelength by using the filter 28 so as to make the interference fringes easy to see. However, the glass may be used instead of the filter 28. Further, the pressure chamber itself may be made of a transparent material.

【0018】さらに、第1の実施例と同様に、作業者の
代わりに撮像素子を用い干渉縞を画像処理して、その信
号をもとに加圧力を自動調節するように自動化を行った
形態でも可能であり、またエアーにかえてN2 や水等の
気流体で加圧してもよい。
Further, as in the first embodiment, an image is processed for interference fringes using an image sensor instead of an operator, and automation is performed so as to automatically adjust the pressing force based on the signal. However, it is also possible to pressurize with a gaseous fluid such as N 2 or water instead of air.

【0019】[0019]

【発明の効果】以上説明したように、本発明によれば、
表示パネルのセルギャップ均一化を、そのギャップ補正
途中の状態を干渉縞によって同時に確認し制御できるた
め、それ以前の個々のパネルのギャップバラツキに左右
されずに、均一性の高い液晶パネルを効率的に製作する
ことが可能となった。
As described above, according to the present invention,
The uniformity of the cell gap of the display panel can be checked and controlled simultaneously by the interference fringes while the gap is being corrected, so that a highly uniform liquid crystal panel can be efficiently created without being affected by gap variations in individual panels before that. It became possible to produce.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施例を示すセルギャップ均一化装
置の断面図である。
FIG. 1 is a sectional view of a cell gap equalizing apparatus showing one embodiment of the present invention.

【図2】同装置の蓋部を省略した時の平面図である。FIG. 2 is a plan view of the apparatus when a cover is omitted.

【図3】本発明による各段階における液晶パネルの状態
断面図である。
FIG. 3 is a sectional view of the liquid crystal panel at each stage according to the present invention.

【図4】本発明の第2の実施例を示すセルギャップ均一
化装置の断面図である。
FIG. 4 is a sectional view of a cell gap equalizing apparatus showing a second embodiment of the present invention.

【図5】液晶パネルの主要部の構成を示す断面図であ
る。
FIG. 5 is a cross-sectional view illustrating a configuration of a main part of the liquid crystal panel.

【符号の説明】[Explanation of symbols]

1 液晶パネル 2 加圧室 3 透明蓋 4 シール材 5 シール材 6 ネジ 7 光源 8 封口剤塗布手段 9 配管継手 10 圧力調節弁 11 加圧手段 12 注入口 13 液晶 14 液晶拭き取り手段 15 封口剤 21 第一の基板 22 第二の基板 23 パネルシール剤 24 スペーサー 25 画素電極 26 液晶層 27 窓付加圧室 28 フィルター A 眼球 B 干渉縞 C 加圧力 DESCRIPTION OF SYMBOLS 1 Liquid crystal panel 2 Pressurization room 3 Transparent lid 4 Sealing material 5 Sealing material 6 Screw 7 Light source 8 Sealing agent application means 9 Pipe joint 10 Pressure control valve 11 Pressurizing means 12 Injection 13 Liquid crystal 14 Liquid crystal wiping means 15 Sealing agent 21 One substrate 22 Second substrate 23 Panel sealant 24 Spacer 25 Pixel electrode 26 Liquid crystal layer 27 Window additional pressure chamber 28 Filter A Eyeball B Interference fringe C Force

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 液状表示媒体が充填された表示パネルを
表示媒体注入口が外部と通じた状態で加圧室内に収納
し、該加圧室内を加圧することにより、表示パネルのセ
ルギャップを調整する方法において、 加圧中の表示パネルに光をあてて発生する干渉縞に基づ
いて、加圧力を制御することを特徴とする表示パネルの
セルギャップ調整方法。
1. A display panel filled with a liquid display medium is housed in a pressurized chamber with a display medium injection port communicating with the outside, and the pressurized chamber is pressurized to adjust a cell gap of the display panel. A method for adjusting a cell gap of a display panel, comprising: controlling a pressurizing force based on interference fringes generated by irradiating a display panel under pressure with light.
【請求項2】 液状表示媒体が充填された表示パネルを
表示媒体注入口が外部と通じた状態で加圧室内に収納
し、該加圧室内を加圧することにより、表示パネルのセ
ルギャップを調整する装置において、 光源と、該光源からの光を前記表示パネルにあてるため
の光透過性蓋と、前記加圧室内の圧力を調整する圧力調
節手段と、を具備したことを特徴とするセルギャップ調
整装置。
2. A display panel filled with a liquid display medium is accommodated in a pressurized chamber with a display medium injection port communicating with the outside, and the pressurized chamber is pressurized to adjust a cell gap of the display panel. A cell gap, comprising: a light source; a light-transmissive lid for directing light from the light source to the display panel; and a pressure adjusting means for adjusting a pressure in the pressurized chamber. Adjustment device.
JP11037804A 1999-02-16 1999-02-16 Method for regulating cell gap of display panel and cell gap regulating device Pending JP2000235189A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6914661B2 (en) 2000-09-07 2005-07-05 Seiko Epson Corporation Cell gap adjusting device, pressurizing seal device and liquid crystal display device manufacturing method
KR100740541B1 (en) 2005-10-28 2007-07-18 케이 이엔지(주) The method to remove the sealant for repairing the LCD panel
KR101255277B1 (en) 2006-09-18 2013-04-15 엘지디스플레이 주식회사 Method for Reparing Liquid Crystal Display Device and Liquid Crystal Display Device Using the Method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6914661B2 (en) 2000-09-07 2005-07-05 Seiko Epson Corporation Cell gap adjusting device, pressurizing seal device and liquid crystal display device manufacturing method
KR100740541B1 (en) 2005-10-28 2007-07-18 케이 이엔지(주) The method to remove the sealant for repairing the LCD panel
KR101255277B1 (en) 2006-09-18 2013-04-15 엘지디스플레이 주식회사 Method for Reparing Liquid Crystal Display Device and Liquid Crystal Display Device Using the Method

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