JP7095853B2 - 色変換フィルム、これを含むバックライトユニット及びディスプレイ装置 - Google Patents
色変換フィルム、これを含むバックライトユニット及びディスプレイ装置 Download PDFInfo
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- JP7095853B2 JP7095853B2 JP2020551552A JP2020551552A JP7095853B2 JP 7095853 B2 JP7095853 B2 JP 7095853B2 JP 2020551552 A JP2020551552 A JP 2020551552A JP 2020551552 A JP2020551552 A JP 2020551552A JP 7095853 B2 JP7095853 B2 JP 7095853B2
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Images
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- 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
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- G02F1/1333—Constructional arrangements; Manufacturing methods
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Description
20:色変換機能層
下記構造式の緑色蛍光体と赤色蛍光体とをモル比50:1で溶媒のキシレン(Xylene)に溶かして、第1溶液を製造した。
実施例1と同一な緑色、赤色蛍光体をモル比50:1で溶媒のキシレン(Xylene)に溶かして、第1溶液を製造した。熱可塑性樹脂(PMMA)を溶媒のキシレンに溶かして、第2溶液を製造した。上記熱可塑性樹脂100重量部に対し、上記緑色及び赤色蛍光体の含量が0.45重量部、TiO2粒子が10重量部になるように、上記第1溶液と第2溶液とを均質に混合した。この溶液をPET基材にコーティングした後に乾燥して、色変換層を製造した。このとき、TiO2粒子は、上記第1または第2溶液のうちいずれか一つに追加して混合するか、TiO2粒子を含む第4溶液を製造するか、第1または第2溶液の混合時にTiO2粒子を投入することができる。
実施例1と同一な緑色、赤色蛍光体をモル比50:1で溶媒のキシレン(Xylene)に溶かして、第1溶液を製造した。熱可塑性樹脂(PMMA)を溶媒のキシレンに溶かして、第2溶液を製造した。パウダー状の相変化素材((Poly(ethylene glycol), PEG)を溶媒のキシレンに溶かして、第3溶液を製造した。上記熱可塑性樹脂100重量部に対し、上記緑色及び赤色蛍光体の含量が0.45重量部、上記相変化素材の含量がそれぞれ70重量部、TiO2粒子が10重量部になるように、上記第1溶液と第2溶液、第3溶液を均質に混合した。この溶液をPET基材にコーティングした後に乾燥して、色変換フィルムを製造した。
上記マイクロカプセル相変化素材を使用しないこと以外には、実施例1と同様に進行して、相変化素材を使用していない色変換フィルムを製造した。
実施例1と比較例2によって製造された色変換フィルムの発光スペクトルを分光放射輝度計(TOPCON社のSR series)で測定した。具体的に、製造された色変換フィルムをLED青色バックライト(最大発光波長450nm)と導光板とを含むバックライトユニットの導光板の一面に積層し、色変換フィルム上にプリズムシートとDBEFフィルムとを積層した後、フィルムの輝度スペクトルを測定し、その結果を図6に示す。また、色変換フィルムの輝度(brightness)及び量子効率(QY)を測定した結果を、下記表1に示す。図6と表1によれば、相変化素材を色変換フィルムに投入しても、光特性が大きく低下しないことが確認できる。
Claims (12)
- 色変換フィルムを含むバックライトユニットを備えるディスプレイ装置であって、
前記色変換フィルムは、
基材フィルム;及び
前記基材フィルム上に備えられた色変換機能層を含み、
前記色変換機能層は、シェル及びコアを含むマイクロカプセル相変化素材を含み、
前記コアは、有機単量体、高分子及び無機塩水和物からなる群より選択される少なくとも一つである相変化素材を含み、
前記色変換機能層は、有機蛍光染料を含み、
前記有機蛍光染料は、ボディピー系、アクリジン系、キサンテン系、アリールメタン系、クマリン系、多環芳香族炭化水素系、多環ヘテロ芳香族系、ペリレン系、ピロール系及びピレン系誘導体のうちいずれか一つ以上を含むものである、
ディスプレイ装置。 - 前記マイクロカプセル相変化素材は、30℃~80℃で相変化が起きるものである、請求項1に記載のディスプレイ装置。
- 前記シェルは、尿素-ホルムアルデヒド、メラミン-ホルムアルデヒド、ポリウレタン樹脂、ポリウレア樹脂、エポキシ樹脂、ゼラチン及びポリアクリル樹脂からなる群より選択される少なくとも一つである、請求項1または2に記載のディスプレイ装置。
- 前記有機単量体は、パラフィン系化合物、脂肪酸系化合物、アルコール系化合物及びカーボネート系化合物からなる群より選択される少なくとも一つである、請求項1から3のいずれか一項に記載のディスプレイ装置。
- 前記高分子は、ポリエチレングリコール(poly(ethylene glycol))、ポリプロピレンオキシド(poly(propylene oxide), PPO)及びポリテトラヒドロフラン(polytetrahydrofuran, PTHF)を含む群より選択される少なくとも一つである、請求項1から4のいずれか一項に記載のディスプレイ装置。
- 前記無機塩水和物は、LiNO3・3H2O、Na2SO4・10H2O、NaCH3COO・3H2O、CaBr2・6H2O、Na2HPO4・12H2O、Zn(NO3)2・nH2O、Na2S2O3・5H2O及びCd(NO3)2・4H2Oを含む群より選択される少なくとも一つである、請求項1から5のいずれか一項に記載のディスプレイ装置。
- 前記色変換機能層は、前記マイクロカプセル相変化素材を含む色変換層を含むものである、請求項1から6のいずれか一項に記載のディスプレイ装置。
- 前記色変換機能層は、色変換層及び相変換層を含み、
前記相変換層は、前記マイクロカプセル相変化素材を含むものである、請求項1から6のいずれか一項に記載のディスプレイ装置。 - 前記色変換機能層上に保護フィルムをさらに含む、請求項1から8のいずれか一項に記載のディスプレイ装置。
- 色変換フィルムを含むバックライトユニットを備えるディスプレイ装置の製造方法であって、
前記製造方法は、
基材フィルムを準備するステップ;及び
前記基材フィルム上にシェル及びコアを含むマイクロカプセル相変化素材を含む色変換機能層を形成するステップを含み、
前記コアは、有機単量体、高分子及び無機塩水和物からなる群より選択される少なくとも一つである相変化素材を含み、
前記色変換機能層は、有機蛍光染料を含み、
前記有機蛍光染料は、ボディピー系、アクリジン系、キサンテン系、アリールメタン系、クマリン系、多環芳香族炭化水素系、多環ヘテロ芳香族系、ペリレン系、ピロール系及びピレン系誘導体のうちいずれか一つ以上を含むものである、
ディスプレイ装置の製造方法。 - 前記色変換機能層を形成するステップは、
樹脂、溶媒、マイクロカプセル相変化素材及び有機蛍光染料が混合された樹脂溶液を準備するステップ;
前記樹脂溶液を前記基材フィルム上にコーティングして、マイクロカプセル相変化素材を含んだ色変換機能層を形成するステップ;及び
前記基材フィルム上に形成された前記マイクロカプセル相変化素材を含んだ色変換機能層を乾燥するステップを含む、請求項10に記載のディスプレイ装置の製造方法。 - 前記色変換機能層を形成するステップは、
前記基材フィルム上に色変換層を形成するステップ;及び
前記色変換層上に前記マイクロカプセル相変化素材を含む相変換層を形成するステップを含む、請求項10または11に記載のディスプレイ装置の製造方法。
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