TWI269101B - Method for aligning polarizer and rubbing axes in liquid crystal display - Google Patents

Method for aligning polarizer and rubbing axes in liquid crystal display Download PDF

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TWI269101B
TWI269101B TW093127435A TW93127435A TWI269101B TW I269101 B TWI269101 B TW I269101B TW 093127435 A TW093127435 A TW 093127435A TW 93127435 A TW93127435 A TW 93127435A TW I269101 B TWI269101 B TW I269101B
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axis
liquid crystal
polarizer
rubbing
alignment
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TW200528817A (en
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Kyung-Ha Lee
Kwi-Hyun Kim
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Boe Hydis Technology Co Ltd
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    • 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
    • G02F1/133528—Polarisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2055—Carbonaceous material
    • B01D39/2058—Carbonaceous material the material being particulate
    • B01D39/2062—Bonded, e.g. activated carbon blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0618—Non-woven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1241—Particle diameter
    • 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
    • G02F1/133528—Polarisers
    • G02F1/133531—Polarisers characterised by the arrangement of polariser or analyser axes
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134372—Electrodes characterised by their geometrical arrangement for fringe field switching [FFS] where the common electrode is not patterned

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
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Description

1269101 五、發明說明（1) 【本發明所屬之技術領域】 本發明係有關一種液晶顯示器，特別是有關一種為了 去除在一邊緣電場驅動模式液晶顯示器之低度灰階與黑暗 狀態下’由於施加一乾場至一面板所引起的殘像與配向餘 痕（rubbing mura)之非對稱地配列偏光軸與配向軸之方 法。 【先前技術】 第1圖係一示意圖，顯示出一傳統的邊緣電場驅動模 式液晶顯示器（FFS-LCD )，第2圖係顯示出一第1圖所示 之傳統的邊緣電場驅動模式液晶顯示器（FFS —LCD)的 光軸示意圖。 如第1圖所示，在一傳統的超!^!^中，一被覆於第〜 ΙΤ0 (氧化錫銦）電極1〇2之上的第二IT〇電極1〇4形狀乃 製作成為梳型，而液晶係配列於角度為〇度的位置。因 此，由於-電場所引起的液晶乃被扭轉使得液晶的上 下侧彼此反向相對，藉此防止由於介電各向異性 、 (dielectric anisotropy )所引起的黃色或藍色的色度 =具有上述構造的傳統FFS_LCD，由 :疊區,很廣’如果傳統的.LCD運作 纟 後，例如絕緣膜等即會形成劣化，即υ μ 極已被研究出來。有终多不同形狀與構造的 在一正常之傳統FFS的黑色模式（black m〇de)中 !2691〇i —-- 五、發明說明（2) 當電壓不施加於傳統的FFS 0 態’且一L255灰階（白色） 施加的電場被配列於一電場 (〜LC )。 依照此種動作原理，由 如液晶中的不純物、電場間 素’都會在低度灰階狀態產 品質劣化的現象。 【本發明之内容】 因此，本發明即為了要 缺點者，而本發明的一目的 緣電場驅動模式液晶顯示器 向軸之方法，藉由扭轉一偏 向光軸’其可去除由於在低 面板之電場所引起之殘像與 為了達成上述之目的， 驅動模式液晶顯示器配列偏 包括下列步驟：配列偏光光 軸，使得一第一預定角度形 間；以及配列偏光光經過液 軸，使得一第二預定角度形 間〇 ^，乃維持於一L0 (暗與黑） 乃被解析，因為液晶係依照所 方向（+LC)或一垂直方向 於長時間施加電場的原因，例 的絕緣層、與液晶配向膜等因 生殘像與餘痕（mura)等晝像 解決發生在上述先前技術中之 即在提供一種非對稱地配列邊 (FFS-LCD)之偏光軸與與配 光板的偏光軸以及上下板的配 度灰階與黑暗狀態下，施加於 配向餘痕（mura)。 本發明乃提供一種在邊緣電場 光轴與配向軸之方法，此方法 所入射的下板之偏光軸與配向 成在下板偏光軸與配向軸之 晶通過的上板之偏光軸與配向 成在上板的偏光軸與配向軸之
【本發明之實施方式】 以下 參照附圖說明本發明 之較佳具體實施例 在以
第8頁 1269101 五、發明說明（3) 下的敘述與附圖中，相同的參考數字代表相同的元件，因 此，相同或近似的元件將予以省略。 第3圖係本發明之實施形態的FFS-LCD的平面圖；第4 圖係第3圖所示之FFS-LCD的偏光軸示意圖；第5圖係依照 本發明之一實施狀態的在黑暗狀態的下板液晶配列形狀示 意圖。 上极興下扳的配向與偏光 依照 當設計目前的FFS單元時 軸係設計成彼此一致，而可形成黑色與白色。然而 μ % 本發明，在一般的暗的狀態，由於少量誤差的電場係施加 至畫素電極3 0 4 ’如第3圖所示’偏光與配向軸乃不對稱地 配列，藉此使得暗色更暗而相當程度地減少了在灰階狀態 的殘像與餘痕（mur a )的可見性。基本上，藉由考慮光係 通，液晶顯示器中、、下板的偏光軸—配向線—上板的偏光 軸"之路徑，本發明即非對稱性地配列偏光軸與配向軸。 在第3圖中，符號302代表一共用電極。 偏光光似入射方、下板，巾其偏光軸與配向軸係配列成 與配向，之間形成一 α。之角度，而偏光光經過 液曰a再通過之上板的偏光軸與配向軸，係配列成在上 偏光軸與配向軸之間的角度為卢。。於是，偏来鈾斑阶& 軸在FFS-ΤΓί)中#韭m π 疋偏先轴與配向 二Si 封稱地配列成一形成在上板與下板之 間的偏光軸之間的角度為9〇。±丨α〜 、 光所入射之下板的偏光軸與配向軸，係、以产、，扁= :而偏光光經過液晶再予通過之上 ：：：轉 係扭轉一沒。之角度。因μ#九釉〇配向軸， 口此，減低了配向餘痕（mura )的
1269101 五、發明說明（4) I[見L偏光ί i:::，向線的上部所產生的液晶之雜 α。與厂較佳的為t = J此非對稱性地配列。此處’ 如第5圖所示 / nr杯Γ^在黑0曰的狀態（Vd〜0V )中，亦即， 電極上面）之液晶配列的里 之電壓約為0。然而二:、日曰狀L下電场 壓，下板部之鄰近的液曰乃 鳇由於微細的漏電流/電 ^及日日乃被扭轉一 γ。的角唐。一私士、 在上板與下板之間的傯氺畆沾fe命θ 1 η I成 j扪偏先軸的角度即從9 0。改變為 90。 ± I α — /? | 。 η 〔發明之效果〕 因此，依照本發明，可去除在傳統的液晶顯示器中長 時間施加電壓日寺’於解析一白色、灰色等的螢幕以後，在 低度灰階（<Ll〇〇 )中，由於殘像與餘痕之可視性所引起 的問4 :而且’依照本發明，其將從來的對稱性單元的設 計概念變更為非對稱性FFS單元的設計概念，豆可去除由 於在低度灰階中有高可視性的配向歪斜所引起之線條圖樣 餘痕，並改善產品的品質。 而且，依照本發明，考慮目前生產的單元設計對比液 晶的變動性，由於偏光軸與配向軸係非對稱性地配列，配 向線餘痕即可改善’低度灰階中長時間可見到的殘留殘像 也可去除’黑暗狀態的配向部的光洩漏現象乃可改善而提 南其對比率’可提供適合醫療用監視器與TV等使用之高品 質黑色與白色之低階影像，且得到一由於當執行一偏$ ^ (polarizer)貼付（attachment)程度所發生的光軸誤
1269101 五、發明說明（5) 差的工程餘裕5故其品質可得提南。 需陳明者，以上所述者乃是本發明較佳具體的實施 例，若依本發明之構想所作之改變，其產生之功能作用， 仍未超出說明書與圖示所涵蓋之精神時，均應在本發明之 範圍内，合予陳明。
1269101 圖式簡單說明 第1圖係從來之FFS-LCD的示意圖。 第2圖係第1圖之FFS-LCD的偏光軸的示意圖。 第3圖係本發明之實施形態的FFS-LCD的平面圖。 第4圖係第3圖所示之FFS-LCD的偏光軸示意圖。 第5圖係依照本發明之一實施狀態的在黑暗狀態的下 板液晶配列形狀示意圖。 【圖式中元件名稱與符號對照】 102 :第一1丁0 (氧化錫銦）電極 104 :第二ΙΤ0電極 3 0 2 :共用電極 3 0 4 :晝素電極

Claims (1)

1269101 六、申請專利範圍 配向1軸：=邊：：：：：模式液晶顯示器配列偏光軸與 /奢此方法包括下列步驟·· —第偏光光所入射的下板之偏光軸與配向軸，使得 疋角度形成在下板偏光軸與配向軸之間丨以及 X ) τγ* » 輪’使得〜爲光光經過液晶通過的上板之偏光軸與配向 間。 第一預定角度形成在上板的偏光軸與配向軸之 與第二 κ清專利範圍第1項之方法’其中第一預定角度 3〜預定角度係小於90。。 轴係配請專利範圍第1項之方法，其中偏光軸與配向 的偏光i成為不相對稱’使得形成在下板的偏光軸與上板 角度I由之間的角度為90。土 I第一預定角度一第二預定
第13頁
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KR100577799B1 (ko) 2006-05-11
CN1658038A (zh) 2005-08-24
US20050179835A1 (en) 2005-08-18
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US7161649B2 (en) 2007-01-09
CN101354491A (zh) 2009-01-28

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