TW201137461A - Method for making a liquid crystal display device - Google Patents

Method for making a liquid crystal display device Download PDF

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Publication number
TW201137461A
TW201137461A TW100105596A TW100105596A TW201137461A TW 201137461 A TW201137461 A TW 201137461A TW 100105596 A TW100105596 A TW 100105596A TW 100105596 A TW100105596 A TW 100105596A TW 201137461 A TW201137461 A TW 201137461A
Authority
TW
Taiwan
Prior art keywords
liquid crystal
polarizing film
crystal panel
film
display device
Prior art date
Application number
TW100105596A
Other languages
Chinese (zh)
Inventor
Koji Ueda
Tatsuya Tsuchioka
Original Assignee
Sumitomo Chemical Co
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 Sumitomo Chemical Co filed Critical Sumitomo Chemical Co
Publication of TW201137461A publication Critical patent/TW201137461A/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00634—Production of filters
    • B29D11/00644—Production of filters polarizing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/0073—Optical laminates
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/54—Arrangements for reducing warping-twist

Abstract

This invention provides a method for making a liquid crystal display device (LED), the method being capable of suppressing the warping of the LED. The method comprises a process of sticking a polarizing film on an LED panel (2) which is performed on each of the two sides of the LED panel (2) while the polarizing film is being cut from an elongated material, wherein the LED panel (2) is moved faster than the moving of the polarizing film in the above process performed on at least one side of the LED panel (2). By this arrangement, a tensile force can be applied on the polarizing film to be stuck to the LED panel and thus respective characteristics (i.e., so-called a machine habit) of the manufacturing apparatus (10) used for performing the sticking process can be corrected, and the warping of the LED panel (2) can be suppressed. As a result the warping of the manufactured LED device (1) can be suppressed and the production yield of the end products can be improved.

Description

201137461 六、發明說明： 【發明所屬之技術領域】 而成的液 本發明是有關在液晶面板上貼合偏光膜片 晶顯示裝置之製造方法。 【先前技術】 目前’在液晶面板的兩面上貼合偏光膜片而構成的液 晶顯示裝置以:般製造。然、而，在液晶面板貼合偏光膜 片時，係施行將捲成輪狀的長尺寸偏光膜片胚膜捲出一 面切斷成預定的長度，一面貼合單片狀的液晶面板之製造 系統。 例如，在專利文獻1及專利文獻2中，係揭示在液晶 面板之兩面上貼合由偏光膜片與保護膜片所構成的偏光板 而製造液晶顯示裝置的製造系統及製造裝置。所製造的液 晶顯示裝置係經模組（module)化之後，再經過各種組裝步 驟，而成為筆記（notebook)型個人電腦或行動電話等的行 動機器，進而成為大型電視等的各種製品（最終製品）。 [先前技術文獻] (專利文獻） 專利文獻1:日本國公開專利「特許第4307510號公報 (2009年8月5日發行）」 專利文獻2:日本國公開專利「特許第434697丨號公報 (2009年10月21日發行）」 【發明内容】 [發明欲解決之課題] 322817 4 201137461 液晶顯示裝置係期望液晶面板的顯示區域全面（成為 全部顯示晝面的部位）無彎曲（趣曲）。有彎曲的液 置是由顯示晝面之等級來判斷為不良品而益法作成製口，、 同時，由^液晶顯示裝置之彎曲（魅曲）在製造後無法矯正， 因而不得不將有彎曲的液晶顯示裝置廢棄。 」而在上述專利文獻1、2所揭示的製造系統及製 造裝置中，對於所製造的液晶顯示裝置之彎曲進行抑制之 事’並未特別考量。亦即，以往之製造方法中，在液晶面 板上貼合偏光板時，用以防止上述不良品產生的對策並未 特別講述，而有無法避免最終製品的生產性或成品產率減 少（不良率的增加）之不適合現象的課題。 本發明是有鏗於上述之課題而創造者，其主要之目的 係提供-種液晶顯示裝置之製造方法，可以抑制所製造的 液晶顯示裝置彎曲之事實。 [解決課題之手段] 本發明人等經過精心再三研究有關液晶顯示裝置彎曲 1原因之結果，查明在液晶面板上貼合偏光膜片時使用的 製造裝置之各個特性（所謂裝置之習性）係與所製造的液晶 ^員示裝置之彎曲有關，遂而完成本發明。 j發明之液晶顯示裝置之製造方法，係^ 了解決上述 課喊而刀別對液晶面板的兩面進行：一面切斷長尺寸 之偏光膜片一面將該偏光膜片貼合於液晶面板之貼合步 驟至；>、邊的上述貼合步驟中之液晶面板之搬送速度設 疋成比偏光臈片之搬送速度快速。 322817 5 201137461 又’本發明的液晶顯示裝置之製造方法，係在兩方之 上述貼合步驟中的液晶面板之搬送速度，以設定成比偏光 膜片之搬送速度快速為較佳。 又’本發明的液晶顯示裝置之製造方法’係將液晶面 板之搬送速度’以設成比偏光膜片之搬送速度快0.1至8% 者更佳。 又，本發明之液晶顯示裝置之製造方法，係以在上述 偏光膜片上貼合保護膜片者更佳。 依上it之、’Ό構’因為液晶面板之搬送速度是比偏光膜 片之搬送速度快速，藉由上述搬送速度之差異，在液晶面 板上貼合時使偏光膜片受到拉伸，而會在該偏光膜片上產 生張力。因此，藉由調節液晶面板兩面所貼合之偏光膜片 的至少-方之張力而可矯正進行貼合步驟時所使用的製 =置之各個特性（所謂裝置之習性），所以可叫制液晶 而可之，㈣料產生張力的偏光媒片 了乂调郎液日a面板之f曲程度，進而可以抑 液晶顯示裝置之彎曲。藉由此而可捭批 剌所製试的 义 一 糟由此而可梃供一種可以抑制所製 仏、夜晶顯7F«置之彎曲的液晶顯示裝置之製 [發明效果] 方法。 依照本發明之液晶顯示裝置的製造方法，在方 :=:=:==:::¾ 產生張力’而可以抑制液晶面板之f曲⑷曲）。儀光膜 於是，依照本發明之液晶顯示裝置的之製造方去，4 322817 6 201137461 以抑制所製造的液晶顯示裝置之彎曲，故能發揮增加最終 製品的生產性或成品產率（減少不良率）之效果。 本發明之其他目的、特徵、及優點可以由以下所示記 載而充分知道。又，本發明之優點是可以參照所添附之圖 面藉由下述之說明而明白。 【實施方式】 [實施發明之最佳形態] 本發明之液晶顯示裝置的製造方法，係分別對液晶面 板的兩面進行：一面切斷長尺寸之偏光膜片一面將該偏光 膜片貼合於液晶面板上之貼合步驟的液晶顯示裝置之製造 方法，至少一邊的上述貼合步驟中之液晶面板之搬送速度 設定成比偏光膜片之搬送速度快速的結構。 本發明中，「彎曲」是指液晶面板的顯示區域在實質 上變成非為平面的狀態之意。也就是說，由顯示晝面之等 級來判斷，判定為不良品程度之液晶顯示裝置呈彎曲的狀 態稱為「彎曲」。因此，本發明中「抑制彎曲」是指由顯示 晝面之等級來判斷的判定為不良品程度之液晶顯示裝置的 彎曲加以抑制（如判定為良品則液晶顯示裝置是呈平坦）之 意。 有關本發明之一個實施形態，根據第1圖之說明係如 下述。但是，本發明並不侷現此等，在所記述之範圍内加 上各種變形之態樣也可以實施。 [液晶顯示裝置] 對於依據本發明之I造方法所製造的液晶顯示裝置 7 322817 201137461 的結構之一個例子’在以下說明《依據本發明之製造方法 所製造的液晶顯不裝置係在液晶面板的表面及背面依序層 積偏光膜片及保護膜片。 作為液晶面板者，適合使用習知的液晶面板。更具體 而δ ’作為液晶面板者’可列舉由一對的玻璃基板等基板 與液晶層所構成，在基板與液晶層之間配置配向膜而成的 習知之液晶面板。 作為偏光膜片者，適合使用習知的偏光膜片。更具體 而5，作為偏光膜片者，可列舉在偏光鏡膜片之兩面貼合 保護膜，進一步在上述保護膜上形成黏著劑層之習知的偏 光膜片。上述黏著劑層t，-邊的黏著劑層係，在偏光膜 片貼合剝離膜片（後述）之同時，為了將偏光膜片貼合在 ::曰：板上而形成。上述黏著劑層中，另一邊之黏著劑層 ^ 了在偏光膜片上貼合保護膜片而形成。因此， “、片、保護膜#及黏著劑層而構成偏光板。 部^為偏紐膜片者，例如列舉：在由PVA(聚乙歸醇）、 物:纖Γ匕聚乙稀醇、乙締—醋酸乙㈣共聚物之部份息化 伸二!等所成之膜片上，施行單轴延 處理的嘴處理，同時實施色相調蟹等各種 沾制、片仁疋，偏光鏡膜片之製造方法並不限定上、十、 ^法，可以顏習知之偏光鏡膜片。 、 素）^為上述賴黯，㈣可鱗：TAG(三乙醯基纖維 乙醢基纖維素等醋峻_ κ眾對本一甲酸乙二酯）、聚萘二曱醆乙二 322817 8 201137461 醋、聚對苯二甲酸丁二酯等聚酯樹脂膜片、聚碳酸醋樹脂 膜片、丙婦酸樹月旨臈片、聚丙烯樹脂膜片等習知的膜片。 偏光膜片之厚度，並無特別限大概在10//m以上， 300 /zm以下。在實用上且在無阻礙之範圍内，偏光膜片也 可以具備上述3層（保護層、偏光鏡膜片、保護4)以外之 其他層。具體上，例如，偏光膜片也可以復具備貼合偏光 鏡膜片與保護膜之黏著劑層（也有稱為接著劑層）。 偏光膜片係以覆蓋液晶面板之顯示區域全面（成為全 U π旦面之部位）之方式，而在該液晶面板之兩面上貼 合0 作為保濩膜片者，適合使用習知之保護膜片。更具體 而^，作為保護膜片者，可列舉如：聚輯膜片、聚對笨二 甲酸乙二酯膜片、聚乙稀膜片、聚丙稀膜片、聚苯乙烯膜 片等習知之保護膜片。上述保護膜片之厚度，並無特別限 定，大概在10//m以上，100 以下。 [液晶顯示裝置之製造方法] 對於採用本發明之液晶顯示裝置的製造方法的製造 裝置之一結構例進行說明。如第丨圖所示，本實施形態之 液晶顯不裝置的製造裝置1〇係採用連續製造液晶顯示裝 置1的所謂Roll to Panel方式之製造裝置，成為下段（1 階）部份備有偏光膜片搬送機構21、上段（2階）部份備有面 板搬送機構30之2段結構。藉由此，可望達到製造裝置 10之省空間化。 、 偏光膜片搬送機構21係將捲成輪狀之長尺寸的偏光 322817 9 201137461 膜片胚膜3a捲出並搬送到貼合部31，而捲入不需要的長 尺寸之剝離臈片3b » 上述偏光膜片胚膜3a是由偏光膜片、黏著劑層、保 護膜片及繼膜片3b所構成之膜片積層體，而成為在偏光 膜片中之液晶面板2貼合側的面上隔著黏著劑層（也可稱 為接著劑層）貼合可剝離之剝離膜片3b，在上述面之背面， 隔著黏著劑層（也可稱為接著劑層）貼合保護膜片。總之， 相對於剥離膜片3b，藉由以黏著劑層、偏光膜片、黏著劑 層及保護膜片之順序積層，而形成偏光板，偏光膜片胚膜 3a係由偏光板及剝離膜片扑所構成。作為上述黏著劑層， ^無特別的限定者，藉由塗布在該技術領域使用的習知黏 著劑（或接著劑）而構成。黏著劑之厚度只要適當設定就可 以。 、，上述剝離膜片（也稱為保護膜片或分離膜片）3b，係偏 先膜片在貼合液晶面板2為止，在不傷害偏光膜片之表面 在液晶面板2所貼合之側面）的目的下進行保護，使偏光 ^貼合在液晶面板2時自偏域片剝__片。作為 麟膜片3b者，例如可以使用：聚乙烯樹脂、聚丙稀樹脂、 聚笨乙稀樹脂、聚對苯二甲酸乙二_樹脂等之膜片。上述 」離膜片3b之厚度並無特別限定，大概在1()_以上⑽ 心以下。又’偏光膜片胚膜3a之寬度，亦即，偏光膜片 之寬度大概在300 mm至1500_左右。 偏光膜片搬送機構21備有：捲出部加、捲入部⑽、 “刀刀（half cutter，無圖示）、刀尖21c、及輥筒群2id。 322817 10 201137461 在捲出部21a設置有長尺寸之偏光骐片胚膜如使該偏光膜 片胚膜3a捲出。上述偏光膜片胚膜％係使其之搬送方向 位於偏光膜片之吸收軸的方向之方式而被捲起部21a捲 入。捲入部21b變成捲入長尺寸之制離膜片沾。同時，偏 光膜片搬送機構21係，在偏光膜片庇膜如之殘存量變少 時，可於短時間内切換新的偏光膜片胚膜之方式，各具備 2個捲出部21a及捲入部21b等。 半切刀係設在比刀尖21C更上游側捲出部21a側）， 將偏光膜片胚膜3a切半，而成為切斷偏光膜片、保護膜片 及黏著劑層之情形。總之，半切刀在沒有切斷剝離膜片3b 之情形下而將長尺寸之偏光臈片（即偏光板）切成預定之長 度。作為半切刀者，可以適合使用刀物、雷射切刀等習知 的切刀。 刀尖21c係從切成預定長度之偏光膜片將剝離膜片北 剝離。偏光膜片與剝離膜片3b之間所形成的黏著劑層係剝 離膜片3b被剝離後而殘留在偏光膜片侧。 輥4群2 Id係以使偏光獏片素材3a產生一定張力而 可搬送該偏光膜片胚膜3a的方式來設置。 面板搬送機構30係具備貼合部31及複數個搬送輥 (無圖示），藉由驅動上述搬送輥而搬送單片狀的液晶面板 2，同時，藉由貼合部31而由上述偏光膜片搬送機構21 所捲出之偏光膜片變成貼合在該液晶面板2的表面（即，貼 合偏光板）。在面板搬送機構3〇由液晶面板2之上方進疒 流下（down flow)之整流（清淨空氣之供給），藉由 二 變成 322817 201137461 液晶面板2的搬送及貼合可在穩定的狀態下進行。 因此’面板搬送機構30是變成沿著偏光膜片搬送機 構21而搬送液晶面板2。亦即，製造裝置從上方觀看 時，係藉由面板搬送機構30所搬送的液晶面板2之搬送方 向中心線’與藉由偏光膜片搬送機構21所搬送的偏光膜片 之搬送方向中心線成一致的方式而配置各搬送機構。 貼合部31是由形成夾持（nip)部之一對軋親（nip rolls)31a/31a所構成，具有在液晶面板2之表面隔著黏 著劑層而貼合偏光膜片（亦即偏光板）之功能。因此，貼合 部31所搬送的偏光膜片以覆蓋液晶面板2之顯示區域全面 (成為全部顯示晝面部位）的方式，對準液晶面板2之位置 (更具體的說，對準搬送方向之前端部的位置）而貼合液晶 面板2上。作為札輥31a/31a者’係以壓接輥（crimping roller)、加壓輥等習知的軋輥為適用。又，軋輥201137461 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a method of manufacturing a polarizing film chip display device in which a liquid crystal panel is bonded. [Prior Art] A liquid crystal display device in which a polarizing film is bonded to both surfaces of a liquid crystal panel is conventionally manufactured. In the case where the polarizing film is bonded to the liquid crystal panel, the long-length polarizing film is wound up in a roll shape and cut into a predetermined length to form a single-piece liquid crystal panel. system. For example, Patent Document 1 and Patent Document 2 disclose a manufacturing system and a manufacturing apparatus for manufacturing a liquid crystal display device by bonding a polarizing plate composed of a polarizing film and a protective film to both surfaces of a liquid crystal panel. The manufactured liquid crystal display device is modularized, and then becomes a mobile device such as a notebook computer or a mobile phone through various assembly steps, and further becomes a product of a large television (final product). ). [Prior Art Document] (Patent Document) Patent Document 1: Japanese Laid-Open Patent Publication No. 4307510 (issued on August 5, 2009) Patent Document 2: Japanese Patent Publication No. 434697丨 (2009) [Announcement of October 21st]) [Problem to be Solved by the Invention] 322817 4 201137461 In the liquid crystal display device, it is desirable that the display area of the liquid crystal panel is comprehensive (the part that displays all the kneading surfaces) without bending (fun). The curved liquid is judged to be a defective product by the level of the display surface, and the bending of the liquid crystal display device (the charm) cannot be corrected after the manufacture, and thus has to be bent. The liquid crystal display device is discarded. In the manufacturing systems and manufacturing apparatuses disclosed in Patent Documents 1 and 2, the suppression of the bending of the manufactured liquid crystal display device has not been particularly considered. In other words, in the conventional manufacturing method, when the polarizing plate is bonded to the liquid crystal panel, the countermeasure for preventing the occurrence of the defective product is not particularly described, and the productivity of the final product or the yield of the finished product cannot be avoided (non-performing ratio). The increase is not suitable for the subject of the phenomenon. The present invention has been made in view of the above problems, and its main object is to provide a method for manufacturing a liquid crystal display device, which can suppress the fact that the liquid crystal display device manufactured is bent. [Means for Solving the Problem] The inventors of the present invention have carefully studied the results of the bending of the liquid crystal display device 1 and found out the characteristics of the manufacturing apparatus used in bonding the polarizing film on the liquid crystal panel (so-called device habit). The present invention has been completed in connection with the bending of the manufactured liquid crystal display device. The manufacturing method of the liquid crystal display device of the invention is to solve the above-mentioned problem and to perform the bonding on the both sides of the liquid crystal panel: the polarizing film is cut into the liquid crystal panel while the polarizing film is cut. Steps to; >, the transport speed of the liquid crystal panel in the above-described bonding step is set to be faster than the transport speed of the polarizing film. Further, in the method of manufacturing a liquid crystal display device of the present invention, it is preferable that the transport speed of the liquid crystal panel in the above-described bonding step is set to be faster than the transport speed of the polarizing film. Further, the method for producing a liquid crystal display device of the present invention is preferably such that the transport speed of the liquid crystal panel is set to be 0.1 to 8% faster than the transport speed of the polarizing film. Further, in the method of manufacturing a liquid crystal display device of the present invention, it is more preferable to bond a protective film to the polarizing film. According to the "Ό" of the liquid crystal panel, the transport speed of the liquid crystal panel is faster than that of the polarizing film, and the polarizing film is stretched when it is bonded to the liquid crystal panel by the difference in the transport speed. A tension is generated on the polarizing film. Therefore, by adjusting at least the tension of the polarizing film bonded to both surfaces of the liquid crystal panel, it is possible to correct the characteristics of the system used in the bonding step (so-called device habit), so that it can be called liquid crystal. However, (4) the polarizing medium that produces the tension has a degree of f curvature of the panel, and thus the bending of the liquid crystal display device can be suppressed. Therefore, it is possible to provide a liquid crystal display device capable of suppressing the bending of the yttrium and the yttrium. According to the method of manufacturing a liquid crystal display device of the present invention, the tension is generated in the square: =:=:==:::3⁄4, and the f curve (4) of the liquid crystal panel can be suppressed. The illuminating film then, according to the manufacturer of the liquid crystal display device of the present invention, 4 322817 6 201137461, can suppress the bending of the manufactured liquid crystal display device, thereby exerting an increase in the productivity of the final product or the yield of the finished product (reducing the defective rate) ) The effect. Other objects, features, and advantages of the present invention will be apparent from the description and appended claims. Further, the advantages of the present invention can be understood by referring to the appended drawings. [Embodiment] The best mode for carrying out the invention is the method for producing a liquid crystal display device of the present invention, wherein the polarizing film is bonded to the liquid crystal on both sides of the liquid crystal panel while the long polarizing film is cut. In the method of manufacturing a liquid crystal display device in the bonding step on the panel, the transport speed of the liquid crystal panel in at least one of the bonding steps is set to be faster than the transport speed of the polarizing film. In the present invention, "bending" means that the display region of the liquid crystal panel is substantially non-planar. In other words, it is judged that the state in which the liquid crystal display device of the defective product is curved is "bending" by the level of the display pupil. Therefore, the "suppression of the bending" in the present invention means that the bending of the liquid crystal display device which is judged to be a defective product as judged by the level of the display surface is suppressed (if the liquid crystal display device is flat if it is judged to be good). An embodiment of the present invention is as follows based on the description of Fig. 1. However, the present invention is not limited to this, and various modifications may be made within the scope of the description. [Liquid crystal display device] An example of the structure of the liquid crystal display device 7 322817 201137461 manufactured by the method of the present invention is described below. The liquid crystal display device manufactured by the manufacturing method according to the present invention is attached to the liquid crystal panel. The polarizing film and the protective film are sequentially laminated on the front surface and the back surface. As a liquid crystal panel, a conventional liquid crystal panel is suitably used. More specifically, δ ′ is a liquid crystal panel. A conventional liquid crystal panel comprising a pair of substrates such as a glass substrate and a liquid crystal layer, and an alignment film disposed between the substrate and the liquid crystal layer. As the polarizing film, a conventional polarizing film is suitably used. More specifically, the polarizing film is a conventional polarizing film in which a protective film is bonded to both surfaces of a polarizing film, and an adhesive layer is further formed on the protective film. The adhesive layer of the adhesive layer t and the side is formed by laminating a release film (described later) on the polarizing film, and bonding the polarizing film to the :?: plate. In the above adhesive layer, the other adhesive layer is formed by bonding a protective film to the polarizing film. Therefore, the ", sheet, protective film # and the adhesive layer constitute a polarizing plate. The portion is a partial film, for example, by PVA (polyethyl alcohol), material: cellulose, polyethylene, The bismuth-acetate (tetra) acetate copolymer is partially formed on the membrane, and the uniaxially treated nozzle is applied, and various kinds of stains such as hue and crab, and the polarizing film are applied. The manufacturing method is not limited to the above, ten, ^ method, can be known as the polarizing lens. 素, ^) for the above Lai, (4) can scale: TAG (triethyl fluorene fiber acetonitrile cellulose and other vinegar _ κ 众 对 本 本 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲 甲A conventional film such as a ruthenium film or a polypropylene resin film. The thickness of the polarizing film is not particularly limited to about 10/m or more and 300 / zm or less. In practical use and in an unobstructed range, The polarizing film may have other layers than the above three layers (protective layer, polarizing film, and protective layer 4). Specifically, for example, The polarizing film may also have an adhesive layer (also referred to as an adhesive layer) for bonding the polarizing film and the protective film. The polarizing film covers the entire display area of the liquid crystal panel (becoming a full U π surface) In the method of bonding the 0 to the protective film on both sides of the liquid crystal panel, it is suitable to use a conventional protective film. More specifically, as a protective film, for example, a collecting film, A conventional protective film such as a polyethylene terephthalate film, a polyethylene film, a polypropylene film, or a polystyrene film. The thickness of the protective film is not particularly limited, and is approximately 10/ [m/m or more, 100 or less. [Manufacturing method of liquid crystal display device] A configuration example of a manufacturing apparatus using the manufacturing method of the liquid crystal display device of the present invention will be described. As shown in the figure, the liquid crystal display of the present embodiment is not shown. The manufacturing apparatus 1 of the apparatus is a so-called Roll to Panel type manufacturing apparatus in which the liquid crystal display device 1 is continuously manufactured, and the lower section (1st order) is provided with a polarizing film transport mechanism 21, and the upper section (2nd order) is provided. panel The two-stage structure of the transport mechanism 30 is achieved, whereby the space saving of the manufacturing apparatus 10 is expected to be achieved. The polarizing film transport mechanism 21 is a long-length polarized light that is wound into a wheel shape. 322817 9 201137461 Membrane film 3a And ejected to the bonding portion 31, and is entangled with the undesired long-sized peeling blade 3b. The polarizing film 13a is composed of a polarizing film, an adhesive layer, a protective film and a succeeding film 3b. In the film laminate, the peelable release film 3b is bonded to the surface on the bonding side of the liquid crystal panel 2 in the polarizing film via an adhesive layer (which may also be referred to as an adhesive layer). On the back side, the protective film is bonded via an adhesive layer (which may also be referred to as an adhesive layer). In addition, with the adhesive layer, the polarizing film, the adhesive layer and the protective film, with respect to the peeling film 3b The polarizing plate is formed by laminating in order, and the polarizing film flake film 3a is composed of a polarizing plate and a peeling film. The adhesive layer is not particularly limited, and is formed by coating a conventional adhesive (or an adhesive) used in the technical field. The thickness of the adhesive can be set as appropriate. The peeling film (also referred to as a protective film or a separation film) 3b is a side surface of the liquid crystal panel 2 that does not damage the surface of the polarizing film until the liquid crystal panel 2 is bonded to the liquid crystal panel 2 For the purpose of protection, when the polarizing film is attached to the liquid crystal panel 2, the film is peeled off from the bias region. As the film 3b, for example, a film of a polyethylene resin, a polypropylene resin, a polystyrene resin, or a polyethylene terephthalate resin can be used. The thickness of the above-mentioned "away film 3b" is not particularly limited, and is approximately 1 () _ or more (10) or less. Further, the width of the polarizing film 13a, that is, the width of the polarizing film is about 300 mm to 1500 mm. The polarizing film transport mechanism 21 includes a winding portion, a winding portion (10), a "half cutter (not shown), a blade edge 21c, and a roller group 2id. 322817 10 201137461 is provided in the winding portion 21a. The polarizing film precursor film 3a having a long size is wound up by the polarizing film blank film 3a. The polarizing film precursor film is rolled up in such a manner that the transport direction thereof is in the direction of the absorption axis of the polarizing film. 21a is entangled in. The entangled portion 21b is entangled in a long-sized separator film. At the same time, the polarizing film transport mechanism 21 is capable of switching to a new one in a short time when the amount of remaining film of the polarizing film is small. In the embodiment of the polarizing film of the polarizing film, each of the two winding portions 21a and the winding portion 21b is provided. The half cutter is provided on the side of the upstream side of the cutting edge 21C (the side of the winding portion 21a), and the polarizing film is formed. The halving is performed to cut off the polarizing film, the protective film, and the adhesive layer. In short, the half cutter cuts the long-sized polarizing plate (ie, the polarizing plate) without cutting the peeling film 3b. It is a predetermined length. As a half cutter, it is suitable to use a knife, a laser cutter, etc. The cutting edge 21c peels off the peeling film from the polarizing film cut into a predetermined length. The adhesive layer peeling film 3b formed between the polarizing film and the peeling film 3b is peeled off and remains. On the side of the polarizing film, the roller group 4 Id is provided so that the polarizing film material 3a can be transported with a certain tension, and the polarizing film piece 3a can be transported. The panel conveying mechanism 30 includes the bonding unit 31 and a plurality of The transport roller (not shown) transports the single-piece liquid crystal panel 2 by driving the transport roller, and the polarizing film that is unwound by the polarizing film transport mechanism 21 by the bonding portion 31 becomes a sticker. The surface of the liquid crystal panel 2 is bonded to the surface of the liquid crystal panel 2 (that is, the polarizing plate is bonded). In the panel transport mechanism 3, the rectification of the down flow (the supply of the clean air) is performed by the upper side of the liquid crystal panel 2, and the second becomes 322817. 201137461 The conveyance and bonding of the liquid crystal panel 2 can be performed in a stable state. Therefore, the panel transport mechanism 30 transports the liquid crystal panel 2 along the polarizing film transport mechanism 21. That is, when the manufacturing apparatus is viewed from above, By panel Each of the transport mechanisms is disposed such that the center line 'the transport direction of the liquid crystal panel 2 transported by the transport mechanism 30 and the center line of the transport direction of the polarizing film transported by the polarizing film transport mechanism 21 are aligned. The nip rolls 31a/31a are formed by forming one of the nip portions, and have a function of bonding a polarizing film (that is, a polarizing plate) to the surface of the liquid crystal panel 2 via an adhesive layer. Therefore, the polarizing film conveyed by the bonding unit 31 is aligned with the liquid crystal panel 2 so as to cover the entire display area of the liquid crystal panel 2 (all of the display surface portions) (more specifically, the alignment direction is aligned). The position of the front end portion is fitted to the liquid crystal panel 2. As the roller 31a/31a, a conventional roll such as a crimping roller or a pressure roller is used. Again, the roll

成為可以任意調節旋轉速度，且可對應需要而適當地調節 夾持部之壓力（夹持壓力）及溫度β ^ ° P 因此，製造裝置1〇以可在液晶面板2之兩面貼合偏 光膜片（亦即偏光板）之方式，除了具備1偏光膜片搬送 機構21之外，同時具備使液晶面板2旋轉及反轉之旋轉反 轉機構（第1圖中並無偏光膜片搬送機構21之一邊與旋轉 反轉機構而省略）。上述旋轉反轉機構係例如具備有吸附液 晶面板2並使之旋轉的吸附機構、與挟持液晶面板2使之 反轉的機械臂機構，成為使液晶面板2旋轉9〇。（使轉動） 同時反轉⑽。(翻轉因此’液晶面板2係藉由第（個偏 322817 12 201137461 光膜片搬送機構21在一方之表面貼合偏光膜片（亦印偏光 板）後，藉由旋轉反轉機構使之旋轉及反轉，接著，藉由 2個偏光膜片搬送機構21在另一方之表面貼合偏光膜片 (亦即偏光板）’而成為液晶顯示裝置1。 又，製造裝置10係具備控制上述各搬送機構的動作 之控制部（無圖示）。亦即，控制部係控制：面板搬送機構 30中之液晶面板2的搬送速度（複數個搬送輥之旋轉速 度）、偏光膜片搬送機構21中之捲出部21&及捲入部 間的偏光膜片胚膜3a的搬送速度（捲出部及捲入部之旋轉 速度）、藉由半切刀之偏光膜片的切斷時點（在偏光膜片之 搬送方向中之長度的設定）、藉由貼合部3丨對液晶面板2 之偏光膜片的貼合時點（對準液晶面板2之偏光膜片的位 置）、以及，軋輥31a/31a之旋轉速度調節、壓力（夾持壓） 調節與溫度調節等之各種製造條件。因此，有關控制部具 體上進行何種控制，係變成根據操作等使用者之預先輸入 (指示）。 對於使用上述結構之製造裝置10的液晶顯示裝置j 之製造方法進行說明。液晶顯示裴置1之製造步驟主要是 由搬送步驟、貼合步驟等所構成。 首先，作為搬送步驟係藉由驅動面板搬送機構3〇中 的複數個搬送輥’將液晶面板2以固定之速度搬送。又， 以固定之旋轉速度使貼合部31之乾輥31a/31a驅動旋轉。 此搬送步驟亦在貼合步驟間進行。總之，搬送步驟是通過 製造步驟全部而實施。 322817 13 201137461 其次，藉由將偏光膜片搬送機構21中之捲出部21a 及捲入部21b以預定之旋轉速度旋轉驅動，除了使偏光膜 片胚膜3a以與液晶面板2之搬送速度不同之搬送速度（亦 即比液晶面板2之搬送速度緩慢的搬送速度）搬送，同時， 藉由半切刀將長尺寸之偏光膜片切成所設定之長度。於是， 藉由刀尖21c將剝離膜片3b自偏光臈片剝離，同時，一面 計算對液晶面板2之偏光膜片（亦即偏光板）的貼合時點， 亦即，一面對準液晶面板2進行偏光臈片之定位，一面將 該偏光膜片搬送到貼合部31之炎持部。之後，在面板搬送 機構30之貼合部31中一面施加預定之壓力（夾持壓），一 面在液晶面板2貼合偏光膜片（貼合步驟）^於是，貼合步 驟是以比液晶面板2之搬送速度緩慢的搬送速度搬送長尺 寸的偏光膜片’一面切斷一面在液晶面板2上進行貼合的 步驟。總之，貼合步驟中’係將液晶面板2之搬送速度設 定成比偏光膜片之搬送速度快速。 本發明中，「偏光膜片之搬送速度」是指在偏光膜片 搬送機構中之捲出部及捲入部間所搬送的偏光膜片（亦即 偏光膜片胚膜或剝離膜片）之搬送速度的意思。因此，「偏 光膜片之搬送速度」是指可藉由調節捲出部及捲取部之旋 轉速度而任意調節。又，「液晶面板之搬送速度」是指通過 貼合部時之液晶面板的搬送速度。因此，「液晶面板之搬送 速度」可藉由調節夾持輥之旋轉速度而任意調節。又，藉 由複數個搬送輥搬送時之液晶面板的搬送速度，係期望與 本發明中「液晶面板之搬送速度」相等，惟在製造步驟上、 14 322817 201137461 無阻礙之範圍内，亦可以與本發明中之「液晶面板之搬送 速度」不同。 相對於液晶面板之搬送速度，偏光膜片（亦即偏光板） 之搬送速度要設定成何等速度（慢速）者，可預先進行實驗 而決定。亦即，要使上述兩者搬送速度之間有何等程度的 差異，係有必要對應製造裝置的各個特性（所謂裝置之習 性）、液晶面板及偏光膜片之材質或厚度等而設定。因此， 例如’在液晶面板之搬送速度設成固定的狀態下而變更偏 光膜片之搬送速度之實驗進行數次，藉由確認所製造的液 曰曰顯示裝置的狀態（有無彎曲），就可以設定偏光膜片之搬 送迷度。更具體而言，可將液晶面板之搬送速度設定成比 偏光膜片之搬送速度一般快〇. 1至8 %即可，以設定成快1 至7 %者較佳’以設定成快3至6%者更佳^所設定之液晶 面板之搬送速度及偏光膜片之搬送速度，係在上述控制部 例如内藏之記憶裝置中，由操作者等使用者預先輸入數據 即可。因此，控制部是成為使用輸入的數據來控制液晶面 板之搬送速度及偏光膜片之搬送速度。 之後’作為旋轉反轉步驟者’係一邊的面上貼合有偏 光犋片（亦即偏光板經貼合）之液晶面板2藉由旋轉反轉機 構而使旋轉及反轉。接著，藉由進行與上述貼合步驟相同 之貼合步驟，在液晶面板2中之另外一邊的面上貼合偏光 膜片（亦即貼合偏光板）。藉此而製造本實施形態的液晶顯 示骏置1。 於是，本發明之液晶顯示裝置的製造方法係，在液晶 15 322817 201137461 面板2的兩面上貼合偏光膜片的上述二次之貼合步驟中， 可將至少一邊的貼合步驟中之液晶面板2之搬送速度設定 成比偏光膜片之搬送速度快速，使更容易抑制液晶面板2 之彎曲（翹曲）之方式，以將兩方之上述貼合步驟中的液晶 面板2之搬送速度設定成比偏光膜片之搬送速度快速者為 更佳。 將液晶面板2之搬送速度設定成比偏光膜片之搬送速 度快速時，由於上述搬送速度之不同，在貼合部31中貼合 於液晶面板2時，變成偏光膜片受到拉伸，可使該偏光膜 片產生張力。因此，藉由調節貼合在液晶面板2的兩面上 之偏光臈片的至少一方的張力，可矯正進行貼合步驟時所 使用之製造裝置10的各個特性（所謂裝置之習性），故可以 抑制液晶面板2之彎曲（翹曲）。總之，由於產生張力的偏 光膜片可以調節液晶面板2之彎曲程度，故可以抑制所製 造的液晶顯示裝置1的彎曲情形。 亦即，依據本發明之液晶顯示裝置的製造方法，因為 液晶面板2之搬送速度比偏光膜片之搬送速度快速，所以 藉由上述搬送速度的差異，可以使在液晶面板2貼合之偏 二、片產生張力。因此，藉由調節在液晶面板2之兩面貼 0的偏光膜片之至少一邊的張力，可以矯正進行貼合步驟 f使用的製造裝置10的各個特性（所謂裝置之習性），因此 可以抑制液晶面板2之彎曲（翹曲）。總之，由於可以抑制 斤製垃的液晶顯示裝置1的彎曲，故可以增加最終製品的 生產性或產品產率（減少不良率）。 、 16 322817 201137461 [實施例] 使用具備第1圖所記載的結構之製造裝置製造液晶顯 示裝置°亦即，將偏光膜片貼合在液晶面板上。 作為液晶面板者，係使用在一對的玻璃基板之間挾住 液晶層’為長度718mm、寬度408mm、厚度1.4mm之液晶面 板。 作為偏光膜片者，係使用在由PVA(聚乙烯醇）所成的 長尺寸的厚度30 之偏光鏡膜片的兩面上貼合由TAC(三 醋酸纖維素）所成的長尺寸的厚度80 ym之偏光鏡保護膜 片（保護獏）的偏光膜片。於是，在上述偏光鏡保護膜片的 兩面上形成厚度25# m之黏著劑層，在該黏著劑層之一邊 的面上貼合由PET(聚對苯二甲酸乙二醋）所成的長尺寸之 厚度38/ζιη的剝離膜片。又’在上述黏著劑層的另一邊的 面上貼合由PET所成的長尺寸之厚度50"m的保護膜片。 總之，相對於剝離膜片’藉由以黏著劑層、偏光膜片、黏 著劑層及保護膜片的順序積層而形成偏光板。接著，將由 上述偏光板及剝離膜片所構成的膜片積層體藉由窄縫加工 成寬度404mm ’作成捲成輪狀的長尺寸之偏光膜片胚膜。 接著，在備有第1圖所記載結構的製造裝置中的偏光 膜片搬送機構之捲出部，設置作成長尺寸的偏光膜片胚 膜，將該偏光膜片胚膜捲出後，以半切刀半切成每個長度 710 mm。之後，以刀尖一面將剝離膜片剝離，一面將經切 斷之偏光膜片貼合在液晶面板上。此時，將液晶面板之搬 送速度設定為18. Om/分鐘，將偏光膜片之搬送速度設定為 17 322817 201137461 17. lm/分鐘。總之，將液晶面板之搬送速度設定成比偏光 膜片之搬送逮度快約5. 3%。 於是’測定在貼合偏光膜片前的液晶面板之彎曲量與 在貼合偏光膜片後的液晶面板之彎曲量。亦即，將此等液 晶面板置栽在平坦的石盤上，將液晶面板與石盤之間產生 的最大間隙以測隙規（feeler gauge)進行測定。其結果， 相對於在貼合偏光膜片前的液晶面板之彎曲量是〇 6匪， 而在貼。偏光膜片後的液晶面板之彎曲量是0_ Omm。總 之，可以抑制液晶面板之彎曲。 [比較例] 之搬送速度 δ又疋為18. 〇m/分鐘（使兩者之搬送速度相同）以外，與實施The rotation speed can be arbitrarily adjusted, and the pressure (nip pressure) and the temperature β ^ ° P of the nip portion can be appropriately adjusted as needed. Therefore, the manufacturing apparatus 1 can be attached to the polarizing film on both sides of the liquid crystal panel 2 In addition to the one polarizing film transport mechanism 21, the rotary reversing mechanism for rotating and reversing the liquid crystal panel 2 is provided (the polarizing film transport mechanism 21 is not provided in the first drawing). One side is omitted with the rotation reversing mechanism). The rotation reversing mechanism is provided with, for example, an adsorption mechanism that sucks and rotates the liquid crystal panel 2, and a mechanical arm mechanism that holds the liquid crystal panel 2 in reverse, and the liquid crystal panel 2 is rotated by 9 turns. (Make rotation) Simultaneously reverse (10). (Inverted, therefore, the liquid crystal panel 2 is rotated by the rotation reversing mechanism after the polarizing film (also printed on the polarizing plate) is attached to the surface of one of the surface of the optical film sheet transporting mechanism 21 by the third lens 322817 12 201137461 In the reverse direction, the polarizing film (ie, the polarizing plate) is bonded to the other surface by the two polarizing film transporting mechanisms 21 to become the liquid crystal display device 1. The manufacturing device 10 is provided to control the above-described respective transports. The control unit (not shown) of the operation of the mechanism, that is, the control unit controls the transport speed of the liquid crystal panel 2 (the rotational speed of the plurality of transport rollers) in the panel transport mechanism 30, and the polarizing film transport mechanism 21 The conveying speed of the polarizing film blank film 3a between the winding portion 21 and the entraining portion (the rotation speed of the winding portion and the winding portion), and the cutting point of the polarizing film by the half cutter (in the polarizing film) The setting of the length in the transport direction), the bonding point of the bonding unit 3 to the polarizing film of the liquid crystal panel 2 (aligning the position of the polarizing film of the liquid crystal panel 2), and the roll 31a/31a Rotation speed adjustment, pressure ( Various kinds of manufacturing conditions such as adjustment and temperature adjustment are performed. Therefore, what kind of control is specifically performed by the control unit is a predetermined input (instruction) by a user such as an operation. Liquid crystal display of the manufacturing apparatus 10 using the above configuration The manufacturing method of the device j will be described. The manufacturing steps of the liquid crystal display device 1 are mainly constituted by a transfer step, a bonding step, etc. First, as a transport step, a plurality of transfer rollers in the drive panel transport mechanism 3 are driven. The liquid crystal panel 2 is transported at a fixed speed, and the dry rolls 31a/31a of the bonding unit 31 are driven to rotate at a fixed rotational speed. This transporting step is also performed between the bonding steps. In short, the transporting step is a manufacturing step. 322817 13 201137461 Next, the winding portion 21a and the entangling portion 21b in the polarizing film sheet conveying mechanism 21 are rotationally driven at a predetermined rotational speed, except that the polarizing film 13A and the liquid crystal panel 2 are provided. The conveyance speed (that is, the conveyance speed which is slower than the conveyance speed of the liquid crystal panel 2) is conveyed at the same time, and at the same time, by half cut The long-sized polarizing film is cut into a predetermined length, and the peeling film 3b is peeled off from the polarizing film by the blade edge 21c, and the polarizing film of the liquid crystal panel 2 (that is, the polarizing plate) is calculated. At the time of the bonding, that is, the polarizing film is conveyed to the liquid crystal panel 2 to position the polarizing film, and the polarizing film is conveyed to the holding portion of the bonding portion 31. Thereafter, the bonding portion of the panel conveying mechanism 30 is attached. When the predetermined pressure (nip pressure) is applied to the liquid crystal panel 2, the polarizing film is bonded to the liquid crystal panel 2 (the bonding step). Then, the bonding step is to transport the long dimension at a conveying speed slower than the conveying speed of the liquid crystal panel 2. The polarizing film 'steps are bonded to the liquid crystal panel 2 while being cut. In the bonding step, the conveying speed of the liquid crystal panel 2 is set to be faster than the conveying speed of the polarizing film. In the present invention, the "transfer speed of the polarizing film sheet" refers to a polarizing film (that is, a polarizing film or a peeling film) that is transported between the winding portion and the winding portion in the polarizing film sheet conveying mechanism. The meaning of the transfer speed. Therefore, the "transfer speed of the polarizing film" can be arbitrarily adjusted by adjusting the rotational speed of the winding portion and the winding portion. In addition, the "transport speed of the liquid crystal panel" refers to the transport speed of the liquid crystal panel when passing through the bonding portion. Therefore, the "transport speed of the liquid crystal panel" can be arbitrarily adjusted by adjusting the rotational speed of the nip roller. In addition, the transport speed of the liquid crystal panel when a plurality of transport rollers are transported is desirably equal to the "transport speed of the liquid crystal panel" in the present invention. However, in the manufacturing step, the range of 14 322817 201137461 is not hindered. In the present invention, the "transport speed of the liquid crystal panel" is different. Regarding the transport speed of the liquid crystal panel, the transfer speed of the polarizing film (that is, the polarizing plate) should be set at what speed (slow speed), and the experiment can be determined in advance. In other words, it is necessary to set the difference between the two transfer speeds in accordance with the characteristics of the manufacturing apparatus (the so-called device habit), the material and thickness of the liquid crystal panel and the polarizing film, and the like. Therefore, for example, the experiment of changing the transport speed of the polarizing film is performed several times in a state where the transport speed of the liquid crystal panel is fixed, and by confirming the state (with or without bending) of the manufactured liquid helium display device, Set the transfer brightness of the polarizing film. More specifically, the transport speed of the liquid crystal panel can be set to be faster than the transport speed of the polarizing film. 1 to 8 % can be set to be faster by 1 to 7 %, preferably set to be fast 3 to It is preferable that the transport speed of the liquid crystal panel and the transport speed of the polarizing film are set in the control unit, for example, a built-in memory device, and the user or the like may input data in advance. Therefore, the control unit controls the transport speed of the liquid crystal panel and the transport speed of the polarizing film by using the input data. Then, the liquid crystal panel 2 to which the polarizing plate (i.e., the polarizing plate is bonded) is attached to the surface of the side of the "rotation inversion step" is rotated and reversed by the rotation reversing mechanism. Then, by performing the bonding step similar to the above-described bonding step, a polarizing film (i.e., a bonding polarizing plate) is bonded to the other surface of the liquid crystal panel 2. Thereby, the liquid crystal display 1 of the present embodiment is manufactured. Therefore, in the method of manufacturing a liquid crystal display device of the present invention, in the above-described secondary bonding step of bonding the polarizing film sheets on both surfaces of the liquid crystal 15 322817 201137461, the liquid crystal panel in the bonding step of at least one side can be used. The transport speed of 2 is set to be faster than the transport speed of the polarizing film, and it is easier to suppress the bending (warpage) of the liquid crystal panel 2, so that the transport speed of the liquid crystal panel 2 in the above-described bonding step is set to It is better than the transfer speed of the polarizing film. When the transport speed of the liquid crystal panel 2 is set to be faster than the transport speed of the polarizing film, the polarizing film is stretched when the bonding unit 31 is bonded to the liquid crystal panel 2 due to the difference in the transport speed. The polarizing film generates tension. Therefore, by adjusting the tension of at least one of the polarizing sheets bonded to both surfaces of the liquid crystal panel 2, it is possible to correct the respective characteristics (so-called device habits) of the manufacturing apparatus 10 used in the bonding step, and thus it is possible to suppress The bending (warping) of the liquid crystal panel 2. In short, since the polarizing film which generates the tension can adjust the degree of bending of the liquid crystal panel 2, the bending of the manufactured liquid crystal display device 1 can be suppressed. In other words, according to the method for manufacturing a liquid crystal display device of the present invention, since the transport speed of the liquid crystal panel 2 is faster than the transport speed of the polarizing film, the liquid crystal panel 2 can be attached to the liquid crystal panel 2 by the difference in the transport speed. The piece produces tension. Therefore, by adjusting the tension of at least one side of the polarizing film which is bonded to both surfaces of the liquid crystal panel 2, it is possible to correct the respective characteristics of the manufacturing apparatus 10 used in the bonding step f (so-called device habit), and thus it is possible to suppress the liquid crystal panel. 2 bending (warping). In short, since the bending of the liquid crystal display device 1 can be suppressed, the productivity of the final product or the product yield (reduction in the defective rate) can be increased. 16 322817 201137461 [Examples] A liquid crystal display device was manufactured by using a manufacturing apparatus having the structure described in Fig. 1, that is, a polarizing film was bonded to a liquid crystal panel. As the liquid crystal panel, a liquid crystal panel having a length of 718 mm, a width of 408 mm, and a thickness of 1.4 mm is sandwiched between a pair of glass substrates. As a polarizing film, a long-length thickness 80 made of TAC (triacetate cellulose) is bonded to both surfaces of a polarizing film having a thickness of 30 which is formed of PVA (polyvinyl alcohol). The polarizing film of the ym polarizer protective film (protective 貘). Then, an adhesive layer having a thickness of 25 #m is formed on both surfaces of the polarizer protective film, and a surface made of PET (polyethylene terephthalate) is attached to one side of the adhesive layer. A release film having a thickness of 38/ζιη. Further, a protective film sheet having a thickness of 50 " m formed of PET was bonded to the other side of the pressure-sensitive adhesive layer. In short, the polarizing plate is formed by laminating the adhesive film, the polarizing film, the adhesive layer, and the protective film in the order of the release film sheet. Next, the film laminated body composed of the polarizing plate and the peeling film was processed into a long-sized polarizing film flake film wound into a wheel shape by a slit having a width of 404 mm'. Next, in the winding portion of the polarizing film sheet conveying mechanism in the manufacturing apparatus having the configuration shown in Fig. 1, a polarizing film flake film having a growing size is provided, and the polarizing film flake film is taken out and half cut. The knife is half cut to 710 mm each. Thereafter, the peeling film was peeled off on the blade edge, and the cut polarizing film was bonded to the liquid crystal panel. At this time, the transport speed of the liquid crystal panel was set to 18. Om/min, and the transport speed of the polarizing film was set to 17 322817 201137461 17. lm/min. 3%。 In general, the transport speed of the liquid crystal panel is set to be faster than the transfer of the polarizing film about 5.3%. Then, the amount of warpage of the liquid crystal panel before bonding the polarizing film and the amount of bending of the liquid crystal panel after bonding the polarizing film were measured. That is, the liquid crystal panels were placed on a flat stone plate, and the maximum gap generated between the liquid crystal panel and the stone plate was measured with a feeler gauge. As a result, the amount of warpage of the liquid crystal panel before the polarizing film is bonded is 〇6匪, and it is attached. The amount of bending of the liquid crystal panel after the polarizing film is 0_0 mm. In short, the bending of the liquid crystal panel can be suppressed. [Comparative Example] The transport speed δ is further reduced to 18. 〇m/min (the same transfer speed is used).

除了將液晶面板之搬送速度及偏光膜片 曲量二0.6mm 在貼合偏光臈片後的液晶面板之響曲量In addition to the transport speed of the liquid crystal panel and the amount of polarizing film curvature of 0.6 mm, the amount of sound of the liquid crystal panel after bonding the polarizing film

曲量與在貼合偏光膜片後的液晶面 在貼合偏光膜片前的液晶面板之彎 已形成偏光板）’也可在進行貼合步驟 亦即，也可作成在液晶面板上貼 322817 201137461 合偏光膜片後，再於偏光膜片上貼合保護膜片之構成。 [產業上之可利用性] 依據本發明之液晶顯示裝置的製造方法，由於可以抑 制所製造之液晶顯示裝置的彎曲，因而可以增加最終製品 的生產性或產品產率（減少不良率）。此外，本發明之液晶 顯示裝置的製造方法可廣泛地應用在製造筆記型個人電腦 或行動電話等檇帶機械，甚至大型電視等之各種產業中。 【圖式簡單說明】 第1圖係說明本發明之液晶顯示裝置的製造方法中之 一個例子，表示製造裝置的概略結構之正面圖。 【主要元件符號說明】 1 液晶顯示裝置 2 液晶面板 3a 偏光膜片胚膜 3b 剝離膜片 10 製造裝置 21 偏光膜片搬送機構 21a 捲出部 21b 捲入部 21c 刀尖 21d 輥筒群 30 面板搬送機構 31 貼合部 31a 軋輥 19 322817The curvature of the liquid crystal panel after the polarizing film is bonded to the liquid crystal panel before the polarizing film is bonded to form a polarizing plate) can also be performed in the bonding step, that is, the liquid crystal panel can be attached to 322817. 201137461 After the polarizing film is combined, the protective film is laminated on the polarizing film. [Industrial Applicability] According to the method for producing a liquid crystal display device of the present invention, since the bending of the liquid crystal display device to be produced can be suppressed, the productivity of the final product or the product yield (reduction in the defect rate) can be increased. Further, the method of manufacturing a liquid crystal display device of the present invention can be widely applied to various industries such as a notebook computer such as a notebook computer or a mobile phone, and even a large television. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front view showing a schematic configuration of a manufacturing apparatus, showing an example of a method of manufacturing a liquid crystal display device of the present invention. [Description of main component symbols] 1 Liquid crystal display device 2 Liquid crystal panel 3a Polarizing film blank film 3b Release film 10 Manufacturing apparatus 21 Polarizing film conveying mechanism 21a Winding portion 21b Winding portion 21c Tool nose 21d Roller group 30 Panel transport Mechanism 31 fitting portion 31a roll 19 322817

Claims (1)

201137461 七、申請專利範圍： 1. 一種液晶顯示裝置之製造方法，係分別對液晶面板的兩 面進行：一面切斷長尺寸之偏光膜片一面將該偏光膜片 貼合於液晶面板之貼合步驟的液晶顯示裝置之製造方 法，其 至少一邊的上述貼合步驟中之液晶面板之搬送速 度設定成比偏光膜片之搬送速度快速。 2. 如申請專利範圍第1項所述之液晶顯示裝置之製造方 法，其中，將兩面之上述貼合步驟的液晶面板之搬送速 度設定成比偏光膜片之搬送速度快速。 3. 如申請專利範圍第1或2項所述之液晶顯示裝置之製造 方法，其中，液晶面板之搬送速度設定成比偏光膜片之 搬送速度快0. 1至8 %。 4. 如申請專利範圍第1至3項中任一項所述之液晶顯示裝 置之製造方法，其中，在上述偏光膜片上貼合保護膜片。 322817201137461 VII. Patent application scope: 1. A method for manufacturing a liquid crystal display device, which is performed on both sides of a liquid crystal panel: a step of attaching the polarizing film to the liquid crystal panel while cutting the long-length polarizing film In the method of manufacturing a liquid crystal display device, the transport speed of the liquid crystal panel in at least one of the bonding steps is set to be faster than the transport speed of the polarizing film. 2. The method of manufacturing a liquid crystal display device according to claim 1, wherein the transport speed of the liquid crystal panel in the bonding step on both sides is set to be faster than the transport speed of the polarizing film. The method of manufacturing the liquid crystal display device according to the first or second aspect of the invention, wherein the transport speed of the liquid crystal panel is set to be 0.1 to 8% faster than the transport speed of the polarizing film. 4. The method of manufacturing a liquid crystal display device according to any one of claims 1 to 3, wherein the protective film sheet is bonded to the polarizing film. 322817
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