JPH08101395A - Production of liquid crystal display element - Google Patents

Production of liquid crystal display element

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Publication number
JPH08101395A
JPH08101395A JP23705494A JP23705494A JPH08101395A JP H08101395 A JPH08101395 A JP H08101395A JP 23705494 A JP23705494 A JP 23705494A JP 23705494 A JP23705494 A JP 23705494A JP H08101395 A JPH08101395 A JP H08101395A
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JP
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Application
Patent type
Prior art keywords
liquid crystal
substrate
ultraviolet
display device
wavelength
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
JP23705494A
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Japanese (ja)
Inventor
Atsukatsu Naitou
Satoru Shinsenji
温勝 内藤
哲 秦泉寺
Original Assignee
Matsushita Electric Ind Co Ltd
松下電器産業株式会社
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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1341Filling or closing of the cell

Abstract

PURPOSE: To prevent deterioration or decomposition of a liquid crystal by UV rays and to provide a display element having high uniformity in the display by including a process of irradiating both electrode substrates with UV rays through a mask having a specified pattern and a filter which cuts UV rays in a wavelength region under a specified wavelength.
CONSTITUTION: (a) A UV-curing sealing material 3 containing benzoin isobutylether as a photoinitiator is formed into a specified pattern on a first electrode substrate 1. (b) Then a liquid crystal 4 is dropped to the surface of the first electrode substrate 1 surrounded with the sealing material 3, while a spacer to control the gap is distributed on a second substrate 2 opposite to the first substrate. (c) Further, the first and second electrode substrates 1, 2 are laminated in vacuum. (d) The both electrode substrates 1, 2 (substrate 9 as a whole) are irradiated with UV rays from a UV lamp 8 through a mask 6 having a specified pattern and a filter 7 which cuts UV rays in the wavelength region under specified wavelength.
COPYRIGHT: (C)1996,JPO

Description

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

【0001】 [0001]

【産業上の利用分野】本発明は、液晶表示素子の製造方法に関するものである。 The present invention relates to a method of manufacturing a liquid crystal display device.

【0002】 [0002]

【従来の技術】従来の液晶滴下法による液晶表示素子の製造方法を図2を用いて説明する。 The method of manufacturing a liquid crystal display device according to Conventional liquid crystal dropping method will be described with reference to FIG. 図2において、第1 2, the first
の電極基板1上に紫外線硬化型シール材3を形成し(工程(a))、次にシール材3で囲まれた領域に液晶4を滴下すると共に、対向する第2の電極基板2にスペーサ5を散布する(工程(b))。 On the electrode substrate 1 to form an ultraviolet-curing sealing material 3 (process (a)), then the region surrounded by the sealant 3 with liquid crystal is dropped 4, a spacer on the second electrode substrate 2 facing 5 sparging (step (b)). 第1及び第2の電極基板1及び2を真空中で貼合せ(工程(c))、貼合せた基板9にマスク6を通して紫外線ランプ8の紫外線を照射し、シール材3を硬化させる(工程(d))。 The first and second electrode substrates 1 and 2 laminated in a vacuum (step (c)), a UV ultraviolet lamp 8 irradiates through the mask 6 to the substrate 9 laminated to cure the seal material 3 (step (d)). その結果、液晶表示素子が製造される。 As a result, the liquid crystal display device is manufactured.

【0003】 [0003]

【発明が解決しようとする課題】上記従来の方法において、液晶4の材料として紫外線により劣化・分解するような液晶を用いた場合、シール材3の周辺部近傍の液晶材料が、マスク6から漏れる紫外線により劣化したり分解するという問題点があった。 In the conventional method of [0005] When using liquid crystal such that degradation or decomposition by ultraviolet rays as the material of the liquid crystal 4, the liquid crystal material near the periphery of the sealing material 3, leaks from the mask 6 there is a problem that decomposed or degraded by ultraviolet rays. また、シール材3の周辺部近傍の液晶材料劣化したり分解すると、液晶表示素子の表示均一性が得られないという問題点を派生させていた。 Moreover, when decomposing or liquid crystal material degradation near the vicinity of the seal member 3 had derive a problem that the display uniformity of a liquid crystal display device can not be obtained. 本発明は液晶滴下法による製造方法において、紫外線により劣化・分解するような液晶を用いた場合でも、 The present invention is in the manufacturing process by the liquid crystal dropping method, even in the case of using a liquid crystal such that degradation or decomposition by ultraviolet light,
表示均一性の高い液晶表示素子が得られる液晶表示素子の製造方法を提供することを目的とする。 And to provide a method of manufacturing a liquid crystal display device having a high liquid crystal display device having display uniformity can be obtained.

【0004】 [0004]

【問題を解決するための手段】上記目的を達成するため、本発明の液晶表示素子の製造方法は、第1の電極基板上に紫外線硬化型シール材を所定のパターンに形成する工程と、シール材で囲まれた基板表面に液晶を滴下する工程と、前記第1の電極基板に相対向する第2の電極基板にギャップ制御用のスペーサー設ける工程と、前記第1及び第2の電極基板を真空中で貼合わせる工程と、 Means for Solving the Problems] To achieve the above object, a method of manufacturing a liquid crystal display device of the present invention includes the steps of forming an ultraviolet-curing sealing material in a predetermined pattern on the first electrode on the substrate, the seal a step of dropping the liquid crystal surrounded by substrate surface in wood, the second electrode substrate opposing to the first electrode substrate and the step of providing a spacer for controlling gap, the first and second electrode substrates a step that is laminated in a vacuum,
貼合わされた第1及び第2の電極基板に、所定のパターンを有するマスク及び特定波長以下の波長の紫外線をカットするフィルターを介して、紫外線を照射する工程とを具備する。 The first and second electrode substrates bonded together, via a filter that cuts ultraviolet rays of the mask and the wavelength of the following specific wavelength having a predetermined pattern, and a step of irradiating ultraviolet rays. 上記構成において、紫外線硬化型シール材は、光開始剤を含むことが好ましい。 In the above configuration, ultraviolet curing sealing material preferably comprises a photoinitiator. また、上記構成において、紫外線硬化シール材の光開始剤の吸収波長は、 In the above structure, the absorption wavelength of the photoinitiator of the UV curable sealant,
前記特定波長よりも波長が長いことが好ましい。 It is preferred wavelength than longer the specific wavelength. また、 Also,
上記構成において、紫外線硬化シール材の光開始剤は、 In the above structure, the photoinitiator of the UV curable sealant,
ベンゾインイソブチルエーテルであることが好ましい。 Preferably a benzoin isobutyl ether.
また、上記構成において、フィルターは、紫外線吸収ガラス、透明基板上に半導体を蒸着した蒸着フィルター及び薄膜を積層した多層型フィルターから選択されたいずれかであることが好ましい。 In the above structure, the filter UV absorbing glass, is preferably any one selected from multi-layered filter obtained by laminating the deposited filter and the thin film was deposited semiconductor on a transparent substrate.

【0005】 [0005]

【作用】以上のように構成された本発明の液晶表示素子の製造方法によれば、フィルターにより、紫外線硬化型シール材を硬化させるための特定波長の紫外線以外の波長の紫外線がカットされる。 According to the manufacturing method of the liquid crystal display device of the effects described above of the present invention configured as, by the filter, ultraviolet ray having a wavelength other than ultraviolet having a specific wavelength for curing the ultraviolet curing sealing material is cut. そのため、紫外線硬化型シール材の硬化効率が低下することはない。 Therefore, the curing efficiency of the ultraviolet curable seal material is not lowered. また、マスクからの液晶への漏れによる紫外線照射量が激減し、液晶の紫外線による劣化・分解を防止することができる。 Further, it is possible to ultraviolet irradiation amount of leakage of the liquid crystal from the mask is depleted, to prevent deterioration and degradation by the liquid crystal of the ultraviolet. 従って、液晶を滴下する製造方法においても、紫外線で劣化・分解する液晶を用いた場合でも、均一で表示特性の高い液晶表示素子を得ることができる。 Accordingly, in the manufacturing method of dropping the liquid crystal, even when a liquid crystal degradation Decomposes UV, it is possible to obtain a high liquid crystal display device having display characteristics uniform.

【0006】 [0006]

【実施例】本発明の液晶表示素子の製造方法を、その好適な一実施例を示す図1を参照しつつ説明する。 The method of manufacturing a liquid crystal display device of the embodiment of the present invention will be described with reference to FIG. 1 showing the preferred embodiment. 図1において、第1の電極基板1に光開始剤ベンゾインイソブチルエーテル(吸収波長:360nm)を含む紫外線硬化型シール材3を所定のパターンに形成する(工程(a))。 In Figure 1, the photoinitiator benzoin isobutyl ether to the first electrode substrate 1 (absorption wavelength: 360 nm) to form an ultraviolet-curing sealing material 3 containing a predetermined pattern (step (a)). 次に、シール材3で囲まれた第1の電極基板1の表面に液晶4を滴下すると共に、相対向する第2の電極基板2にギャップ制御用のスペーサー5を散布する(工程(b))。 Next, the first electrode surface of the substrate 1 surrounded by the sealing material 3 with liquid crystal is dropped 4, to spray spacers 5 for controlling the gap to the second electrode substrate 2 facing each other (step (b) ). さらに、第1及び第2の電極基板1及び2を真空中で貼合わせる(工程(c))。 Further, the first and second electrode substrates 1 and 2 is laminated in a vacuum (step (c)). 貼合わせた第1及び第2の電極基板1及び2(全体を基板9とする)に所定のパターンをもつマスク6及び特定波長以下の波長の紫外線をカットするフィルター7(東芝ガラス製UV−35:波長320nm以下カット)を介して、 Filter 7 (Toshiba Glass UV-35 in which the first and second electrode substrates 1 and 2 (the whole to the substrate 9) for cutting ultraviolet rays of a wavelength mask 6 and the particular wavelength having a predetermined pattern was laminated : through the following cut) wavelength 320nm,
紫外線ランプ8により紫外線を照射する(工程(d))。 The ultraviolet lamp 8 is irradiated with ultraviolet rays (step (d)). その結果、液晶表示素子が製造される。 As a result, the liquid crystal display device is manufactured.

【0007】以上のようにして製造された液晶表示素子の均一性評価を行ったところ、シール材3の周辺も含め、液晶表示装置の表示パネル全面において、むらのない均一な表示が得られた。 [0007] was subjected to uniformity evaluation of the liquid crystal display device manufactured as described above, including the periphery of the sealing member 3, in the display panel over the entire surface of the liquid crystal display device, unevenness-free uniform display was obtained . また、点灯表示評価を行なった結果、高い均一性を持つ液晶表示素子が作製されていることが確認された。 As a result of performing lighting display evaluation, it was confirmed that the liquid crystal display device having a high uniformity is produced. 一方、従来の方法のように、フィルターを設けないで製造した液晶表示装置の場合、このような均質な表示は得られなかった。 On the other hand, as in the conventional method, when the liquid crystal display device manufactured without providing a filter, such a uniform display was obtained.

【0008】すなわち、本発明では、シール材3を硬化させるために必要なの特定波長(例えば波長360nm Namely, in the present invention, a specific wavelength (e.g., wavelength 360nm required to cure the seal material 3
紫外線)を含む320nm以上の波長の紫外線のみフィルター7を透過し、波長320nm以下の紫外線はフィルター7によりカットされている。 It passes through the filter 7 only ultraviolet ray having a wavelength of more than 320nm including ultraviolet), following UV wavelength 320nm is cut by the filter 7. そのため、マスク6 Therefore, mask 6
から漏れる紫外線の量は、従来例と比較して激減し、シール材3の周辺部における液晶の紫外線により劣化・分解はきわめて少なくなる。 The amount of ultraviolet leaking from the depleted in comparison with the conventional example, the deterioration and decomposition of a liquid crystal of the ultraviolet in the peripheral portion of the sealing member 3 is very small. そのため、液晶表示素子の表示パネル全面においてむらのない均一な表示が得られる。 Therefore, uniform display without unevenness in display panel entirely of the liquid crystal display device can be obtained.

【0009】なお、本実施例では紫外線硬化型シール樹脂の光開始剤としてベンゾインイソブチルエーテルを用いたが、他の光開始剤を用い、その光開始剤の吸収波長に合わせたフィルターを用いても、同様の効果が得られる。 [0009] Although using the benzoin isobutyl ether as a photoinitiator of the UV curing sealing resin in the present embodiment, with other photoinitiators, even using a filter matched to the absorption wavelength of the photoinitiator , the same effect can be obtained. また、フィルター7としてUV吸収ガラス(東芝ガラス製)を用いたが、ガラス等の透明基盤に半導体を蒸着した蒸着フィルターや薄膜を積層した多層膜型フィルター等のような紫外線カットフィルターを用いても、同様の効果が得られる。 Although with UV absorbing glass (manufactured by Toshiba Glass) as a filter 7, even using a UV cut filter, such as a multilayer type filter obtained by laminating the deposited filter or a thin film with a deposit of semiconductor on a transparent base of glass or the like , the same effect can be obtained.

【0010】 [0010]

【発明の効果】以上のように、本発明の液晶表示素子の製造方法によれば、フィルターにより、紫外線硬化型シール材を硬化させるための特定波長の紫外線以外の波長の紫外線がカットされので、紫外線硬化型シール材の硬化効率を低下させることなく、マスクからの液晶への漏れによる紫外線照射量を激減させ、液晶の紫外線による劣化・分解を防止することができる。 As is evident from the foregoing description, according to the manufacturing method of the liquid crystal display device of the present invention, the filter by, at ultraviolet wavelengths other than ultraviolet having a specific wavelength for curing a UV-curable sealant that is cut, without lowering the curing efficiency of UV-curable sealant, depletes the amount of UV irradiation due to leakage of the liquid crystal from the mask, it is possible to prevent the deterioration and degradation by the liquid crystal of the ultraviolet. 従って、液晶を滴下する製造方法においても、紫外線で劣化・分解する液晶を用いた場合でも、均一で表示特性の高い液晶表示素子を得ることができる。 Accordingly, in the manufacturing method of dropping the liquid crystal, even when a liquid crystal degradation Decomposes UV, it is possible to obtain a high liquid crystal display device having display characteristics uniform.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の液晶表示素子の製造方法の好適な一実施例を示す工程図 Process diagram showing an embodiment preferred of the method for manufacturing the liquid crystal display device of the present invention; FIG

【図2】従来の液晶表示素子の製造方法を示す工程図 [2] a process diagram showing a manufacturing method of a conventional liquid crystal display device

【符号の説明】 DESCRIPTION OF SYMBOLS

1 :第1の電極基板 2 :第2の電極基板 3 :シール材 4 :液晶 5 :スペーサ 6 :マスク 7 :フィルター 8 :紫外線ランプ 1: a first electrode substrate 2: the second electrode substrate 3: sealing member 4: LCD 5: spacer 6: Mask 7: Filter 8: UV lamps

Claims (5)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 第1の電極基板上に紫外線硬化型シール材を所定のパターンに形成する工程と、 シール材で囲まれた基板表面に液晶を滴下する工程と、 前記第1の電極基板に相対向する第2の電極基板にギャップ制御用のスペーサー設ける工程と、 前記第1及び第2の電極基板を真空中で貼合わせる工程と、 貼合わされた第1及び第2の電極基板に、所定のパターンを有するマスク及び特定波長以下の波長の紫外線をカットするフィルターを介して、紫外線を照射する工程とを具備する液晶表示素子の製造方法。 And 1. A process for forming an ultraviolet-curing sealing material in a predetermined pattern on the first electrode on the substrate, a step of dropping the liquid crystal on the substrate surface surrounded by the sealing material, said first electrode substrate a step of second electrode substrate to provide a spacer for controlling gap opposite, the first and second electrode substrate and the step of bringing stuck in a vacuum, the first and second electrode substrates stuck, predetermined method of manufacturing a liquid crystal display device through a filter that cuts ultraviolet rays of a wavelength mask and a particular wavelength having a pattern of, and a step of irradiating ultraviolet rays.
  2. 【請求項2】 紫外線硬化型シール材は、光開始剤を含むことを特徴とする請求項1記載の液晶表示素子の製造方法。 2. A ultraviolet-curable sealant, a method of manufacturing a liquid crystal display device according to claim 1, characterized in that it comprises a photoinitiator.
  3. 【請求項3】 紫外線硬化シール材の光開始剤の吸収波長は、前記特定波長よりも波長が長いことを特徴とする請求項1又は2記載の液晶表示素子の製造方法。 Absorption wavelength photoinitiator wherein ultraviolet curing sealant, a method of manufacturing a liquid crystal display device according to claim 1 or 2, wherein the wavelength is longer than the specific wavelength.
  4. 【請求項4】 紫外線硬化シール材の光開始剤は、ベンゾインイソブチルエーテルである請求項2又は3記載の液晶表示素子の製造方法。 Photoinitiator wherein ultraviolet curing sealant, a method of manufacturing a liquid crystal display device according to claim 2 or 3 wherein the benzoin isobutyl ether.
  5. 【請求項5】 フィルターは、紫外線吸収ガラス、透明基板上に半導体を蒸着した蒸着フィルター及び薄膜を積層した多層型フィルターから選択されたいずれかである請求項1から4のいずれかに記載の液晶表示素子の製造方法。 5. A filter is a liquid crystal according to any one ultraviolet absorbing glass, claim 1 is any one of a deposition filter and the thin film was deposited semiconductor selected from multilayer filter formed by laminating on a transparent substrate 4 method of manufacturing a display device.
JP23705494A 1994-09-30 1994-09-30 Production of liquid crystal display element Pending JPH08101395A (en)

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