JP2017187744A - K−Si−F系蛍光体および吸収染料を含む液晶表示装置 - Google Patents
K−Si−F系蛍光体および吸収染料を含む液晶表示装置 Download PDFInfo
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- JP2017187744A JP2017187744A JP2017020662A JP2017020662A JP2017187744A JP 2017187744 A JP2017187744 A JP 2017187744A JP 2017020662 A JP2017020662 A JP 2017020662A JP 2017020662 A JP2017020662 A JP 2017020662A JP 2017187744 A JP2017187744 A JP 2017187744A
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- liquid crystal
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- light
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Classifications
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Liquid Crystal (AREA)
- Luminescent Compositions (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Planar Illumination Modules (AREA)
Abstract
【解決手段】バックライトユニット20および液晶パネル10を含み、バックライトユニット20がK−Si−F系蛍光体を含む白色発光素子パッケージを含み、バックライトユニット20および/または液晶パネル10が当該構成中に1つ以上のコーティング層または1つ以上の粘着層を備え、前記1つ以上のコーティング層または1つ以上の粘着層が特定波長帯域の光を吸収する1種以上の吸収染料を含むことを特徴とする。
【選択図】図1
Description
バックライトユニットおよび液晶パネルを含む液晶表示装置において、
前記バックライトユニットは、K−Si−F系蛍光体を含む白色発光素子パッケージを含み、
前記バックライトユニットおよび/または液晶パネルが当該構成中に1つ以上のコーティング層または1つ以上の粘着層を備え、前記1つ以上のコーティング層または1つ以上の粘着層は特定波長帯域の光を吸収する1種以上の吸収染料を含む液晶表示装置
を提供する。
図1を参照すると、液晶パネル10は、上偏光板101、第1粘着層102、液晶セル103、第2粘着層104および下偏光板105を順次積層された形態で含み、バックライトユニット20は、二重輝度向上フィルム(dual brightness enhancement film;DBEF)211または上拡散シート221、水平プリズムシート202、垂直プリズムシート203、下拡散シート204、導光板205および反射板206からなる群より選択される2種以上を順次含むことができる。
アクリルバインダー樹脂(Soken社製、GS1000)25重量%と、メチルエチルケトン(MEK)75重量%とを混合して溶液を製造した後、これにTAP系の吸収染料(エスケイケミカル社製、SK−d593、主吸収波長帯域:560nm〜600nm)を前記溶液100重量部に対して0.05重量部の量で添加してコーティング層組成物を製造した。
下拡散シートの片面に吸収染料を含むコーティング層を形成せず、YAG蛍光体(Y3Al5O12:Ce)を含む白色発光素子パッケージを適用したバックライトユニット(製造社:LG電子、製品名:55UB8400)を使用することを除いては、前記実施例1と同一構造の液晶表示装置を製造した。
下拡散シートの片面に吸収染料を含むコーティング層を形成しないことを除いては、前記実施例1と同一構造の(すなわち、構造変更することなく市販のままの)液晶表示装置を製造した。
前記実施例1、ならびに比較例1および2で製造した液晶表示装置について、ラジオメーター(CS−2000;ミノルタ(Minolta)社)を用いて、スペクトルの変化および特性を測定し、その結果を表1および図6〜図8に示す。色域(color gamut)は色再現面積を示す。
101: 上偏光板
102: 第1粘着層
103: 液晶セル
104: 第2粘着層
105: 下偏光板
20: バックライトユニット
211: 二重輝度向上フィルム(DBEF)
221: 上拡散シート
202: 水平プリズムシート
203: 垂直プリズムシート
204: 下拡散シート
205: 導光板
206: 反射板
221−1: 第1ビード
221−2: 拡散コーティング層
221−3: 拡散シート基材
221−4: ビードコーティング層
221−5: 第2ビード
202−1: プリズムパターン層
202−2: プリズムシート基材
202−3: 背面コーティング層
202−4: 第3ビード
206−1: 第4ビード
206−2: 前面コーティング層
206−3: 反射板基材
300: 白色発光素子パッケージ
310、320: リードフレーム
330: 発光素子
340: ワイヤ
350: 樹脂層
360: 外装材
370: K−Si−F系蛍光体
a、b、c: 光
Claims (16)
- バックライトユニットおよび液晶パネルを含む液晶表示装置において、
前記バックライトユニットがK−Si−F系蛍光体を含む白色発光素子パッケージを含み、
前記バックライトユニットおよび/または液晶パネルが当該構成中に1つ以上のコーティング層または1つ以上の粘着層を備え、前記1つ以上のコーティング層または1つ以上の粘着層が特定波長帯域の光を吸収する1種以上の吸収染料を含む、液晶表示装置。 - 前記液晶パネルが上偏光板、第1粘着層、液晶セル、第2粘着層および下偏光板を順次含み、
前記第1粘着層および/または第2粘着層が、特定波長帯域の光を吸収する1種以上の吸収染料を含む、請求項1に記載の液晶表示装置。 - 前記バックライトユニットが二重輝度向上フィルム(DBEF)もしくは上拡散シート、プリズムシート、下拡散シート、導光板および反射板からなる群より選択される2種以上を順次含み、
前記二重輝度向上フィルムもしくは上拡散シートの片面または両面、前記プリズムシートの片面または両面、前記下拡散シートの片面または両面、前記導光板の片面または両面、および前記反射板の片面のうち1つ以上の位置にコーティング層を有し、
前記コーティング層が特定波長帯域の光を吸収する1種以上の吸収染料を含む、請求項1に記載の液晶表示装置。 - 前記吸収染料がRGB以外の主吸収波長帯域を有する、請求項1に記載の液晶表示装置。
- 前記吸収染料が、380nm〜430nm、480nm〜510nmまたは560nm〜600nmの主吸収波長帯域を有する、請求項1に記載の液晶表示装置。
- 前記吸収染料が、ヒドロキシベンゾトリアゾール(HB)系、トリスレゾルシノールトリアジンクロモフォア(TRTC)系、ヒドロキシフェニルベンゾトリアゾールクロモフォア(HBC)系、ピロールメチン(PM)系、ローダミン(RH)系、ボロンジピロメテン(BODIBY)系、テトラアザポルフィリン(TAP)系、スクアリン(SQ)系およびシアニン(CY)系の染料からなる群より選択される、請求項1に記載の液晶表示装置。
- 前記吸収染料が、ヒドロキシベンゾトリアゾール系、シアニン系、ピロールメチン系、およびテトラアザポルフィリン系の染料からなる群より選択される、請求項6に記載の液晶表示装置。
- 前記吸収染料が、ヒドロキシベンゾトリアゾール系、シアニン系、およびテトラアザポルフィリン系の染料の組み合わせである、請求項7に記載の液晶表示装置。
- 前記吸収染料が、コーティング層または粘着層の総重量を基準に0.01重量%〜10重量%の量で含まれる、請求項1に記載の液晶表示装置。
- 前記コーティング層が1μm〜100μmの厚さを有するか、または前記粘着層が2μm〜100μmの厚さを有する、請求項1に記載の液晶表示装置。
- 前記白色発光素子パッケージが、K−Si−F系蛍光体を含む樹脂層と、前記K−Si−F系蛍光体を励起させる近紫外線または青色光を発光する発光素子とを含む、請求項1に記載の液晶表示装置。
- 前記樹脂層が、前記発光素子上にモールド成形により形成され、光透過性樹脂および前記光透過性樹脂中に分散されたK−Si−F系蛍光体を含む、請求項11に記載の液晶表示装置。
- 前記光透過性樹脂が、エポキシ樹脂、シリコーン樹脂、ポリイミド樹脂、ユリア樹脂およびアクリル樹脂からなる群より選択される1種以上である、請求項12に記載の液晶表示装置。
- 前記樹脂層が、光透過性樹脂100重量部に対して0.01重量部〜20重量部の量でK−Si−F系蛍光体を含む、請求項12に記載の液晶表示装置。
- 前記K−Si−F系蛍光体がK2SiF6:Mn赤色蛍光体である、請求項11に記載の液晶表示装置。
- 前記発光素子が350nm〜460nmの波長帯域の青色光を発光し、
前記白色発光素子パッケージが420nm〜700nmの波長帯域の白色光を発光する、請求項15に記載の液晶表示装置。
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