JP4760275B2 - 液晶表示装置 - Google Patents
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- JP4760275B2 JP4760275B2 JP2005289336A JP2005289336A JP4760275B2 JP 4760275 B2 JP4760275 B2 JP 4760275B2 JP 2005289336 A JP2005289336 A JP 2005289336A JP 2005289336 A JP2005289336 A JP 2005289336A JP 4760275 B2 JP4760275 B2 JP 4760275B2
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Images
Classifications
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- G02B5/20—Filters
- G02B5/28—Interference filters
- G02B5/285—Interference filters comprising deposited thin solid films
- G02B5/286—Interference filters comprising deposited thin solid films having four or fewer layers, e.g. for achieving a colour effect
-
- 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
-
- 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
- G02F1/133509—Filters, e.g. light shielding masks
-
- 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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
- G02F1/133521—Interference filters
-
- 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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- 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
- G02F2203/00—Function characteristic
- G02F2203/05—Function characteristic wavelength dependent
- G02F2203/055—Function characteristic wavelength dependent wavelength filtering
Description
図1は本発明の第1の実施の形態による液晶表示装置10の一構成例を示す概略図である。図示する液晶表示装置10は、例えば大型液晶テレビ用に構成され、液晶パネル(液晶セル)11と、この液晶パネル11の背面側(図1において下方側)に配置されたバックライトユニット12とを有している。液晶パネル11とバックライトユニット12との間には、拡散板13、プリズムシート14、拡散シート15、偏光分離素子16等が適宜組み合わされて配置されている。
Δxy=√{(x0−x1)2+(y0−y1)2}
ここで、x0,y0は正面方向(φ=0°)における色度座標、x1,y1は角度φにおける色度座標をそれぞれ示している。なお、実験にはELDIM社製視野角測定器「EZ−CONTRAST」を用いた。
そして、このような特性を有する広色域光源を備えた液晶表示装置の液晶パネル前面に上記構成の光学フィルタ4を設けることで、曲線3で示したように、従来の光源に比べて視角φに対するΔxyの変化量を抑えられることが確認された。
なお、視角φ=80°における色差Δxyは、従来の低NTSC比光源で0.023、広色域光源で0.032、本発明の光学フィルタ4を備えた広色域光源で0.021であった。
バックライトユニット12から出射したRGB各色の光はともに同一レベルであるとする(図7A)。バックライトユニット12から出射した光は、液晶パネル11を透過するまでの間に拡散板13、プリズムシート14、拡散シート15、偏光分離素子16、偏光板3a,3b、カラーフィルタ17等によって輝度(強度)が低下する。
また、これら各種光学シートあるいは液晶層1の屈折率異方性等を原因として、パネル正面方向に出射する光とパネル斜め方向に出射する光との間で発光スペクトルが異なる。バックライトにLED等の広色域光源が用いられている場合、パネル斜め方向に出射する可視光は、B及びGに比べてRの方が輝度が高い(図7B)。光学フィルタ4は、斜め方向から出射する可視光のうちR成分の透過率を選択的に抑えて、RGB各色の輝度の均一性を高める働きをする(図7C)。
この光学フィルタは、入射角0°で波長400〜650nmの可視光の透過率が70%以上であり、入射角60°で波長600nm以上の可視光の透過率が波長450〜550nmの可視光の平均透過率の約70%に設計されている。実験の結果、正面方向と斜め方向での色差は良好であり、斜め方向から見たときの画面の赤色化も見られなかった。
図9は本発明の第2の実施の形態による液晶表示装置用光学フィルムとしての光学フィルタ4’の構成例を示している。本実施の形態の光学フィルタ4’は、透過率90%以上の透明プラスチックフィルム(例えばPETフィルム)製の透明支持体5の両面に高屈折率材料層6と低屈折率材料層7を順にそれぞれ積層した誘電体多層膜で構成されている。
図11は、本発明の第3の実施の形態による液晶表示装置20を示している。なお、図において上述の第1の実施の形態と対応する部分については同一の符号を付し、その詳細な説明は省略する。
図12は、本発明の第4の実施の形態による液晶表示装置30を示している。なお、図において上述の第3の実施の形態と対応する部分については同一の符号を付し、その詳細な説明は省略する。
・顔料微粒子:TiO2微粒子 100重量部
(石原産業社製、平均粒径約20nm、屈折率2.48)
・結合剤:SO3Na基含有ウレタンアクリレート 9.2重量部
(数平均分子量:350、SO3Na濃度:1×10-1mol/g)
・分散剤:ポリオキシエチレンリン酸エステル 7.5重量部
・有機溶媒:メチルイソブチルケトン(MIBK) 4800重量部
・紫外性(UV)硬化性樹脂:ジペンタエリスリトールヘキサアクリレートとジペンタエリスリトールペンタアクリレートとの混合物 22重量部
(日本化薬社製、商品名DPHA)
・結合剤:末端カルボキシル基をもつパーフルオロブテニルビニルエーテルの重合体 100重量部
・有機溶媒:含フッ素アルコール(C6F13C2H4OH)とパーフルオロブチルアミンとの混合溶媒(混合比95:5) 1666重量部
上述の塗料A,Bを用いて以下のようにして光学フィルムのサンプルを作製した。
実施例2〜6における各サンプルの屈折率材料層の膜厚、積層数、積層形態を表1にまとめて示す。実施例2では、低屈折率材料層のみを形成した(この場合、PET基材が高屈折率材料層(屈折率1.65程度)に相当)。実施例3〜5では、(2層目の)低屈折率材料層の上に更に高屈折率材料層および低屈折率材料層を形成した。
Claims (2)
- 液晶パネルと、
NTSC比90%以上の光源を有し、前記液晶パネルの背面側に配置されたバックライトユニットと、
第1の屈折率材料層と前記第1の屈折率材料層よりも低い屈折率を有する第2の屈折率材料層とが交互に複数積層された誘電体多層膜と、前記誘電体多層膜を支持する透明プラスチックフィルム製の透明支持体とを有し、前記液晶パネルの前面側に配置された光学フィルタとを具備し、
前記光学フィルタは、前記バックライトユニットから出射する波長600nm以上の可視光について、前記液晶パネルから正面方向に出射する場合よりも斜め方向に出射する場合の透過率を低下させ、前記バックライトユニットから出射する波長400〜450nmの可視光について、当該光学フィルタへ入射角0°で入射する場合よりも入射角10°以上30°以下で入射する場合の透過率の平均値を高める液晶表示装置。 - 請求項1に記載の液晶表示装置であって、
前記光学フィルタは、入射角60°で入射する可視光について、波長600nmから650nmの可視光の透過率の平均値が、波長600nm未満の可視光の透過率の平均値よりも低い液晶表示装置。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005289336A JP4760275B2 (ja) | 2005-05-23 | 2005-09-30 | 液晶表示装置 |
TW095118296A TW200708860A (en) | 2005-05-23 | 2006-05-23 | Optical element, liquid crystal panel, and liquid crystal display device |
CN200680000788XA CN101019049B (zh) | 2005-05-23 | 2006-05-23 | 光学元件、液晶显示面板、以及液晶显示器 |
US11/659,914 US8223295B2 (en) | 2005-05-23 | 2006-05-23 | Optical element, liquid crystal panel, and liquid crystal display |
KR1020077003107A KR101220479B1 (ko) | 2005-05-23 | 2006-05-23 | 광학 필터, 액정 패널 및 액정 표시 장치 |
EP06746750A EP1884806A4 (en) | 2005-05-23 | 2006-05-23 | OPTICAL ELEMENT, LIQUID CRYSTAL PANEL, AND LIQUID CRYSTAL DISPLAY DEVICE |
PCT/JP2006/310266 WO2006126549A1 (ja) | 2005-05-23 | 2006-05-23 | 光学素子、液晶パネル及び液晶表示装置 |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005149380 | 2005-05-23 | ||
JP2005149380 | 2005-05-23 | ||
JP2005289336A JP4760275B2 (ja) | 2005-05-23 | 2005-09-30 | 液晶表示装置 |
Publications (3)
Publication Number | Publication Date |
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JP2007004104A JP2007004104A (ja) | 2007-01-11 |
JP2007004104A5 JP2007004104A5 (ja) | 2007-03-01 |
JP4760275B2 true JP4760275B2 (ja) | 2011-08-31 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2005289336A Expired - Fee Related JP4760275B2 (ja) | 2005-05-23 | 2005-09-30 | 液晶表示装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8223295B2 (ja) |
EP (1) | EP1884806A4 (ja) |
JP (1) | JP4760275B2 (ja) |
KR (1) | KR101220479B1 (ja) |
CN (1) | CN101019049B (ja) |
TW (1) | TW200708860A (ja) |
WO (1) | WO2006126549A1 (ja) |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW200821703A (en) * | 2006-11-10 | 2008-05-16 | Delta Electronics Inc | Optical system and liquid crystal display apparatus thereof |
KR100852273B1 (ko) * | 2007-04-13 | 2008-08-14 | 신홍우 | 백라이트 유니트와 이를 이용한 액정표시모듈 |
US8208097B2 (en) * | 2007-08-08 | 2012-06-26 | Samsung Corning Precision Materials Co., Ltd. | Color compensation multi-layered member for display apparatus, optical filter for display apparatus having the same and display apparatus having the same |
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WO2006126549A1 (ja) | 2006-11-30 |
CN101019049A (zh) | 2007-08-15 |
EP1884806A1 (en) | 2008-02-06 |
CN101019049B (zh) | 2012-05-02 |
TWI354166B (ja) | 2011-12-11 |
US8223295B2 (en) | 2012-07-17 |
WO2006126549B1 (ja) | 2007-02-15 |
JP2007004104A (ja) | 2007-01-11 |
TW200708860A (en) | 2007-03-01 |
KR20080009257A (ko) | 2008-01-28 |
US20070247567A1 (en) | 2007-10-25 |
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