TWI755197B - 光學膜、背光模組及光學膜的製造方法 - Google Patents
光學膜、背光模組及光學膜的製造方法 Download PDFInfo
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- TWI755197B TWI755197B TW109143755A TW109143755A TWI755197B TW I755197 B TWI755197 B TW I755197B TW 109143755 A TW109143755 A TW 109143755A TW 109143755 A TW109143755 A TW 109143755A TW I755197 B TWI755197 B TW I755197B
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- Prior art keywords
- optical film
- polymer
- quantum dot
- acrylic monomer
- inhibitor
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- 239000012788 optical film Substances 0.000 title claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000002096 quantum dot Substances 0.000 claims abstract description 86
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000000178 monomer Substances 0.000 claims abstract description 44
- 229920000642 polymer Polymers 0.000 claims abstract description 41
- 239000002245 particle Substances 0.000 claims abstract description 24
- 239000003112 inhibitor Substances 0.000 claims abstract description 22
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 239000010410 layer Substances 0.000 claims description 38
- -1 thiol compound Chemical class 0.000 claims description 29
- 239000003292 glue Substances 0.000 claims description 25
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallyl group Chemical group C1(=C(C(=CC=C1)O)O)O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 claims description 12
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- LTHJXDSHSVNJKG-UHFFFAOYSA-N 2-[2-[2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethoxy]ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOCCOCCOC(=O)C(C)=C LTHJXDSHSVNJKG-UHFFFAOYSA-N 0.000 claims description 3
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- XOALFFJGWSCQEO-UHFFFAOYSA-N tridecyl prop-2-enoate Chemical compound CCCCCCCCCCCCCOC(=O)C=C XOALFFJGWSCQEO-UHFFFAOYSA-N 0.000 claims description 3
- PJAKWOZHTFWTNF-UHFFFAOYSA-N (2-nonylphenyl) prop-2-enoate Chemical compound CCCCCCCCCC1=CC=CC=C1OC(=O)C=C PJAKWOZHTFWTNF-UHFFFAOYSA-N 0.000 claims description 2
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- IAIPQRSDDHNOSQ-UHFFFAOYSA-N butan-1-ol 3-sulfanylpropanoic acid Chemical compound SCCC(=O)O.SCCC(=O)O.SCCC(=O)O.C(O)CCC IAIPQRSDDHNOSQ-UHFFFAOYSA-N 0.000 claims 1
- 239000007858 starting material Substances 0.000 claims 1
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 claims 1
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Abstract
本發明公開一種光學膜、背光模組及光學膜的製造方法。本發明光學膜包括:量子點膠層以及設置於量子點膠層上的屏蔽層,量子點膠層包含第一聚合物以及分散於第一聚合物的複數個量子點,第一聚合物包括1至5 wt%的光起始劑、3至20 wt%的散射粒子、20至50 wt%的硫醇類化合物、5至30 wt%的單官能基壓克力單體、20至40 wt%的多官能基壓克力單體、1至5 wt%的有機矽接枝低聚物以及500至1500ppm的抑制劑。通過本發明的量子點膠層配方組成,可提供無須設置屏蔽層的光學膜,有效降低膜厚並維持高抗水氧效果。
Description
本發明涉及一種光學膜,特別是涉及一種可應用於背光模組、LED封裝的量子點光學膜。
近年來,隨著顯示技術的不斷進步,人們對顯示器的品質要求也越來越高。量子點(Quantum Dots)由於其特有的量子限域效應引起了研究者的廣泛關注。相較於傳統的有機發光材料,量子點的發光效能具有半峰寬窄、顆粒小、無散射損失和光譜隨尺寸可調控和光化學性能穩定等優勢。此外,量子點的光學、電學和傳輸性能可以通過合成過程得以調整,這些優點使得量子點具有十分重要的作用。近年來,具有量子點的高分子複合材料已使用於背光及顯示器等領域。
然而,量子點的發光效率極易受氧氣、水氣等影響。現有技術通常會設置樹脂膜於量子點膜正反面兩側,或再進一步設置阻隔膜,以提升光學膜阻絕水氣和氧氣的能力。然而,額外的層結構不僅增加額外的成本、生產時間,更無法降低整體成品厚度,無法應用於電視以外的顯示器上,限制了量子點技術在顯示器上的使用範圍。
故,如何通過量子點膜層配方的設計改良,以達到省略部分額外設置膜層,來克服上述的缺陷,已成為該項事業所欲解決的重要課題之一。
本發明所要解決的技術問題在於,針對現有技術的不足提供一種僅由量子點膠層單層結構組成的光學膜,其膜厚僅為30至50μm。
為了解決上述的技術問題,本發明所採用的其中一技術方案是提供一種光學膜,其是由一量子點膠層所組成;更詳細來說,量子點膠層包含一第一聚合物以及分散於所述第一聚合物的複數個量子點,且以量子點膠層的總重為100重量百分比,所述第一聚合物包括:1至5 wt%的光起始劑、3至20 wt%的散射粒子、20至50 wt%的硫醇類化合物、5至30 wt%的單官能基壓克力單體、20至40 wt%的多官能基壓克力單體、1至5 wt%的有機矽接枝低聚物以及500至1500ppm的抑制劑。
於本發明的一具體實施例中,所述量子點膠層包括一第一表面以及一第二表面,且所述第一表面以及所述第二表面皆為裸露、未設置一屏蔽層。
於本發明的一具體實施例中,所述硫醇類化合物選自於由2, 2'-(乙二氧基)二乙硫醇、2, 2'-硫二乙硫醇、三羥甲基丙烷三(3-巰基丙酸酯)、聚乙二醇二硫醇、季戊四醇四(3-巰基丙酸酯)、乙二醇雙巰基乙酸酯以及2-巰基丙酸乙酯所組成的群組。
於本發明的一具體實施例中,所述單官能基壓克力單體是選自由甲基丙烯酸四氫糠酯、丙烯酸硬脂酯、甲基丙烯酸月桂酯、丙烯酸月桂酯、甲基丙烯酸異冰片酯、丙烯酸十三烷基酯、烷氧基化壬基酚丙烯酸酯、四乙二醇二甲基丙烯酸酯、聚乙二醇(600)二甲基丙烯酸酯、三丙二醇二丙烯酸酯以及乙氧基化(10)雙酚A二甲基丙烯酸酯所組成的群組。
於本發明的一具體實施例中,所述多官能基壓克力單體是選自三羥甲基丙烷三丙烯酸酯、三羥甲基丙烷三甲基丙烯酸酯、乙氧基化(20)三羥甲基丙烷三丙烯酸酯以及季戊四醇三丙烯酸酯所組成的群組。
於本發明的一具體實施例中,,所述有機矽接枝低聚物是選自於由矽氧烷丙烯酸酯以及矽氧烷環氧樹脂所組成的群組。
於本發明的一具體實施例中,所述抑制劑是選自由鄰苯三酚(PYR)、對苯二酚、鄰苯二酚、碘化鉀-碘混合物、受阻酚系抗氧化劑(Hindered phenol antioxidants)、鋁或鐵試劑鹽(N-亞硝基苯基羥胺鹽)(N-nitrosophenyl hydroxylamine ammonium salt, N-nitroso-N-phenylhydroxylamine aluminum salt)、3-丙烯基苯酚、三芳基膦和亞磷酸鹽(triaryl phosphines and phosphites)、膦酸(phosphonic acid)、烯基酚和試劑鹽的組合物(combination of an alkenyl-phenol and cupferronate salt)所組成的群組。
為了解決上述的技術問題,本發明所採用的另外一技術方案是提供一種光學膜的製造方法,其包括:將複數個量子點分散於一第一聚合物,並形成一量子點膠層,以量子點膠層的總重為100重量百分比,所述第一聚合物包括:1至5 wt%的光起始劑、3至20 wt%的散射粒子、20至50 wt%的硫醇類化合物、5至30 wt%的單官能基壓克力單體、20至40 wt%的多官能基壓克力單體、1至5 wt%的有機矽接枝低聚物以及500至1500ppm的抑制劑。
於本發明的一具體實施例中,光學膜的製造方法進一步包括:先將複數個量子點分散於所述單官能基壓克力單體,再加入所述抑制劑。
於本發明的一具體實施例中,光學膜的製造方法中,加入所述抑制劑後進一步包括:加入一硫醇類化合物,再加入多官能基壓克力單體混合,最後加入光起始劑、散射粒子以及壓克力低聚物。
為了解決上述的技術問題,本發明所採用的另外再一技術方案是提供一種背光模組,其包括:一導光單元、至少一發光單元以及一光學膜;其中,所述光學膜對應於所述入光側,並位於所述導光單元與至少一所述發光單元之間,所述光學膜是由一量子點膠層所組成,其包含一第一聚合物以及分散於所述第一聚合物的複數個量子點,所述第一聚合物包括:1至5 wt%的光起始劑、3至20 wt%的散射粒子、20至50 wt%的硫醇類化合物、5至30 wt%的單官能基壓克力單體、20至40 wt%的多官能基壓克力單體、1至5 wt%的有機矽接枝低聚物以及500至1500ppm的抑制劑。
本發明的其中一有益效果在於,本發明所提供的光學膜、背光模組及其製造方法,其能通過“一量子點膠層,其包含一第一聚合物以及分散於所述第一聚合物的複數個量子點”以及“所述第一聚合物包括:1至5 wt%的光起始劑、3至20 wt%的散射粒子、20至50 wt%的硫醇類化合物、5至30 wt%的單官能基壓克力單體、20至40 wt%的多官能基壓克力單體、1至5 wt%的有機矽接枝低聚物以及500至1500ppm的抑制劑”的技術方案,以提供可省略雙面或一面貼附屏蔽層,也就是說,只需要量子點膠層即可維持高抗水氧效果。
為使能更進一步瞭解本發明的特徵及技術內容,請參閱以下有關本發明的詳細說明與圖式,然而所提供的圖式僅用於提供參考與說明,並非用來對本發明加以限制。
以下是通過特定的具體實施例來說明本發明所公開有關“光學膜、背光模組以及光學膜的製造方法”的實施方式,本領域技術人員可由本說明書所公開的內容瞭解本發明的優點與效果。本發明可通過其他不同的具體實施例加以施行或應用,本說明書中的各項細節也可基於不同觀點與應用,在不背離本發明的構思下進行各種修改與變更。另外,本發明的附圖僅為簡單示意說明,並非依實際尺寸的描繪,事先聲明。以下的實施方式將進一步詳細說明本發明的相關技術內容,但所公開的內容並非用以限制本發明的保護範圍。另外,本文中所使用的術語“或”,應視實際情況可能包括相關聯的列出項目中的任一個或者多個的組合。
參閱圖1所示,本發明第一實施例提供一種光學膜M,其是由一量子點膠層10所組成。更詳細來說,量子點膠層10包含第一聚合物101以及分散於第一聚合物的複數個量子點102。進一步來說,量子點膠層10具有第一表面10A以及第二表面10B,第一表面10A以及第二表面10B皆是裸露並未被覆蓋。詳細來說,光學膜M,也就是量子點膠層10的厚度約為30至50μm。
進一步針對量子點膠層的組成配比說明,量子點膠層包含第一聚合物以及分散於第一聚合物的複數個量子點,詳細來說,量子點膠層包括0.1至5wt%的量子點無機材料,以量子點膠層的總重為100重量百分比,第一聚合物包括:1至5 wt%的光起始劑、3至20 wt%的散射粒子、20至50 wt%的硫醇類化合物、5至30 wt%的單官能基壓克力單體、20至40 wt%的多官能基壓克力單體、1至5 wt%的有機矽接枝低聚物以及500至1500ppm的抑制劑。須特別注意的是,以量子點膠層的總重為100重量百分比,光起始劑、散射粒子、硫醇類化合物、單官能基壓克力單體、多官能基壓克力單體以及有機矽接枝低聚物混合總重為100重量百分比,最後再加入500至1500ppm的抑制劑。
光起始劑可以選自於由1-羥基環己基苯基酮、苯甲酰異丙醇、三溴甲基苯碸及二苯基(2,4,6-三甲基苯甲酰基)氧化膦所構成的群組,該散射粒子為0.5至20μm且經表面處理的壓克力或二氧化矽或聚苯乙烯微珠。然而,若光起始劑的含量低於1wt%則難以固化,含量超過5wt%則會影響膠才整體性質的揮發性。
散射粒子為0.5至10μm且經表面處理的微珠,微珠材料可以是壓克力、二氧化矽、二氧化鍺、二氧化鈦、二氧化鋯、三氧化二鋁或聚苯乙烯。散射粒子的折射率約為1.39至1.45。散射粒子提供較佳的量子點發出的光產生散射,使量子點膠層所產生的光更加均勻,若散射粒子含量低於3wt%則霧度不足,超過20wt%則過多,導致整體材料樹脂含量不足,影響分散性並增加加工困難度。
具體來說,硫醇類化合物是選自於由2, 2'-(乙二氧基)二乙硫醇、2, 2'-硫二乙硫醇、三羥甲基丙烷三(3-巰基丙酸酯)、聚乙二醇二硫醇、季戊四醇四(3-巰基丙酸酯)、乙二醇雙巰基乙酸酯以及2-巰基丙酸乙酯所組成的群組。硫醇類化合物是包含巰基官能團(-SH)的非芳香化合物,提供了與量子點具有較佳結合性的官能基,使得量子點具有較佳的分散性,硫醇類化合物的含量相較於現有技術的配比較高,使得聚合度較高,而含量若低於20wt%則不具備效果,含量超過50wt%則造成膠材過軟、容易彎折。
單官能基壓克力單體是選自由甲基丙烯酸四氫糠酯、丙烯酸硬脂酯、甲基丙烯酸月桂酯、丙烯酸月桂酯、甲基丙烯酸異冰片酯、丙烯酸十三烷基酯、烷氧基化壬基酚丙烯酸酯、四乙二醇二甲基丙烯酸酯、聚乙二醇(600)二甲基丙烯酸酯、三丙二醇二丙烯酸酯以及乙氧基化(10)雙酚A二甲基丙烯酸酯所組成的群組。單官能基壓克力單體過少對量子點的分散性不佳,而過多則導致聚合效率低下,且耐候性不佳。
多官能基壓克力單體是選自三羥甲基丙烷三丙烯酸酯、三羥甲基丙烷三甲基丙烯酸酯、乙氧基化(20)三羥甲基丙烷三丙烯酸酯以及季戊四醇三丙烯酸酯所組成的群組。多官能基壓克力單體若添加過量則容易造成膠材過脆,容易破損。
有機矽接枝低聚物是選自由矽氧烷丙烯酸酯以及矽氧烷環氧樹脂所組成的群組,有機矽接枝低聚物可增加聚合物的耐候性,更可提高聚合物的機械強度。詳細來說,一般現有技術的光學膜若省略屏蔽層,不僅會降地耐水氧的效果,也會造成機械強度不足的缺陷。1至5wt%的有機矽接枝低聚物可提高量子點膠層的機械強度,若超過該含量則會影響分散性、加工性,且提高成本。
抑制劑是選自由 鄰苯三酚(PYR)、對苯二酚、鄰苯二酚、碘化鉀-碘混合物、受阻酚系抗氧化劑(Hindered phenol antioxidants)、鋁或鐵試劑鹽(N-亞硝基苯基羥胺鹽)( N-nitrosophenyl hydroxylamine ammonium salt, N-nitroso-N-phenylhydroxylamine aluminum salt)、3-丙烯基苯酚、三芳基膦和亞磷酸鹽(triaryl phosphines and phosphites)、膦酸(phosphonic acid)、烯基酚和試劑鹽的組合物(combination of an alkenyl-phenol and cupferronate salt)所組成的群組。抑制劑可有效減緩反應速率,避免成分中的配方相互影響,舉例來說,硫醇類化合物與多官能基壓克力單體易於室溫下產生自反應,在製備的時候加入抑制劑提供較佳的加工性,也具有較穩定的保存性。然而,若添加量低於500ppm無法達到抑制效果,超過1500ppm時,則會影響光固化效率。
進一步來說,複數顆量子點(Quantum Dots,QDs) ,量子點包括紅色量子點、綠色量子點、藍色量子點及其混合。舉例而言,可以是紅色量子點與綠色量子點的混合。這些量子點之間具有不同或相同的粒徑。另外,每一量子點例如可包含核心與外殼,外殼包覆核心。在一或多個實施方式中,量子點的核心/外殼的材料可包含硒化鎘 (CdSe)/ 硫化鋅 (ZnS)、磷化銦(InP)/硫化鋅(ZnS)、硒化鉛(PbSe)/硫化鉛(PbS)、硒化鎘(CdSe)/硫化鎘(CdS)、碲化鎘(CdTe)/硫化鎘(CdS)或碲化鎘(CdTe)/硫化鋅(ZnS),然而本發明不以此為限。
更進一步地,量子點的核心與外殼皆可為二六族(Group II-VI)、二五族(Group II-V)、三六族(Group III-VI)、三五族(Group III-V)、四六族(Group IV-VI)、二四六族(Group II-IV-VI)或二四五族(Group II-IV-V)複合材料,其中用語「族」指代元素週期表的族。
其中核心的材質可為硫化鋅(ZnS)、硒化鋅(ZnSe)、碲化鋅 (ZnTe)、硫化鎘(CdS)、硒化鎘(CdSe)、碲化鎘(CdTe)、硫化汞 (HgS)、硒化汞(HgSe)、HgTe(碲化汞)、氮化鋁(AlN)、磷化鋁(AlP)、砷化鋁(AlAs)、銻化鋁(AlSb)、氮化鎵(GaN)、磷化鎵(GaP)、砷化鎵(GaAs)、銻化鎵(GaSb)、硒化鎵 (GaSe)、氮化銦(InN)、磷化銦(InP)、砷化銦(InAs)、銻化銦(InSb)、氮化鉈(TlN)、磷化鉈(TlP)、砷化鉈(TlAs)、銻化鉈(TlSb)、硫化鉛(PbS)、硒化鉛(PbSe)、碲化鉛(PbTe)或上述之任意組合。
而外殼的材質可為氧化鋅 (ZnO)、硫化鋅(ZnS)、硒化鋅(ZnSe)、碲化鋅 (ZnTe)、氧化鎘 (CdO)、硫化鎘(CdS)、硒化鎘(CdSe)、碲化鎘(CdTe)、氧化鎂 (MgO)、硫化鎂 (MgS)、硒化鎂(MgSe)、 碲化鎂(MgTe)、氧化汞 (HgO)、硫化汞 (HgS)、硒化汞 (HgSe)、 碲化汞(HgTe)、氮化鋁 (AlN)、磷化鋁 (AlP)、砷化鋁(AlAs)、銻化鋁(AlSb)、氮化鎵(GaN)、磷化鎵(GaP)、砷化鎵(GaAs)、銻化鎵(GaSb)、氮化銦(InN)、磷化銦(InP)、砷化銦(InAs)、銻化銦(InSb)、氮化鉈(TlN)、磷化鉈(TlP)、砷化鉈(TlAs)、銻化鉈(TlSb)、硫化鉛(PbS)、硒化鉛(PbSe)、碲化鉛(PbTe)或上述之任意組合。
參閱圖2,本發明另外提供一種光學膜的製造方法,其包括:S100將多個量子點分散於第一聚合物,經過固化以形成量子點膠層。
第一聚合物以及量子點的組成如前所述。而更具體來說,如圖3所示,S100的分散步驟是包括:S101先將複數個量子點分散於單官能基壓克力單體,再加入抑制劑。以及S102加入硫醇類化合物,再加入多官能基壓克力單體混合,最後加入光起始劑、散射粒子以及有機矽接枝低聚物。
也就是說,將複數個量子點分散於第一聚合物並非分散於完全混合的第一聚合物,而是依序將量子點預先分散於特定組成,再進一步加入其他成分,充分混合經過混煉後再進行固化步驟。
除了前述步驟之外,本發明的光學膜的製造方法還包括:進行一裁切程序,以將光學膜裁切成至少一個所需的大小;以及,進行一收捲程序,以將剩餘的光學膜收捲成卷,以便使用或收納。
參閱圖6所示,本發明還提供一種背光模組S,其包括:導光單元30、至少一發光單元40以及光學膜M,導光單元30具有一入光側30A,至少一發光單元40位於相對於入光側30A,且包括複數個發光元件,光學膜M相對於入光側30A,光學膜M位於導光單元30與至少一發光單元40之間,詳細來說,導光單元30具有相對的入光側30A以及出光側30B,光學膜M設置於入光側30A,更具體來說光學光單元M為本發明前述的光學膜。然而,上述所舉的例子只是其中一可行的實施例而並非用以限定本發明。
[實施例]
如表1所示,實施例1至2以及比較例1是依據以下配方以及比例製備為量子點膠膜,並進一步經過成品性質測試。詳細來說,以下配比是以量子點膠層的總重為100重量百分比,光起始劑、散射粒子、硫醇類化合物、單官能基壓克力單體、多官能基壓克力單體以及有機矽接枝低聚物混合總重為100重量百分比,另外再計抑制劑。
具體來說,詳細步驟是先將複數個量子點分散於單官能基壓克力單體,形成一量子點-單官能基壓克力溶液,依序再於量子點-單官能基壓克力溶液中加入抑制劑,均勻混合後加入硫醇類化合物,再加入多官能基壓克力單體混合,最後加入光起始劑、散射粒子以及有機矽接枝低聚物,均勻混合後得到一量子點膠層材料。
將前述量子點膠層材料塗佈於一載體層,經過烘乾處理,已形成本發明的量子點膠層。
表1
配比 | 實施例1 | 實施例2 | 比較例1 |
光起始劑 | 3 wt% | 3 wt% | 3 wt% |
散射粒子 | 10 wt% | 10 wt% | 10 wt% |
硫醇類化合物 | 20 wt% | 20 wt% | 0 wt% |
單官能基壓克力單體 | 25 wt% | 25 wt% | 50 wt% |
多官能基壓克力單體 | 35 wt% | 35 wt% | 35 wt% |
有機矽接枝低聚物 | 5 wt% | 5 wt% | 0 wt% |
量子點顆粒粉末 | 2 wt% | 2 wt% | 2 wt% |
抑制劑 | 1000 ppm | 1000 ppm | 0 |
厚度 | 30 μm | 50 μm | 30 μm |
抗水氧效果 | 65℃ 95%相對濕度,1000小時亮度損失0% 色座標x,y偏移量0.0020 | 65℃ 95%相對濕度,1000小時亮度損失0% 色座標x,y偏移量0.0020 | 65℃ 95%相對濕度,1000小時亮度損失12% 色座標x,y偏移量0.0150 |
光穿透性 | 92% | 90% | 87% |
折射率 | 1.55 | 1.55 | 1.49 |
機械性質 | 可對折 | 可對折 | 不可對折 最大彎折角度<70 |
收縮性 | 29 ppm/℃ | 29 ppm/℃ | 34 ppm/℃ |
輝度 | 650Cd/m 2 | 695 Cd/m 2 | 510 Cd/m 2 |
[實施例的有益效果]
本發明的其中一有益效果在於,本發明所提供的光學膜、背光模組及光學膜的製造方法,其能通過“一量子點膠層,其包含一第一聚合物以及分散於所述第一聚合物的複數個量子點”以及“所述第一聚合物包括:1至5 wt%的光起始劑、3至20 wt%的散射粒子、20至50 wt%的硫醇類化合物、5至30 wt%的單官能基壓克力單體、20至40 wt%的多官能基壓克力單體;1至5 wt%的有機矽接枝低聚物、以及500至1500ppm的抑制劑”的技術方案,以提供可省略屏蔽層的光學膜,也就是說,只需要單層量子點膠層,即可具有優異的抗水氧效果,並同時保有適度的機械強度及收縮性。
更進一步來說,硫醇類化合物提供了巰基官能團(-SH)的非芳香化合物,與量子點具有較佳結合性,使得量子點具有較佳的分散性,硫醇類化合物的含量相較於現有技術的配比較高,使得聚合度較高。
而一般現有技術的光學膜若省略屏蔽層,不僅會降地耐水氧的效果,也會造成機械強度不足的缺陷,本發明所選用的有機矽接枝低聚物是選自由矽氧烷丙烯酸酯以及矽氧烷環氧樹脂所組成的群組,可增加聚合物的機械強度,有效達到省略屏蔽層並維持相同光學膜特性,更降低光學膜的厚度約為30至50μm,且具有較佳的光學性質可適用於藍光背光模組,應用於薄規格領域手機產品。
再者,本發明的配方製程在混合時也須特別留意相互影響的問題,因此,經過各種實驗,本發明更選用了特定的抑制劑,可有效減緩反應速率,避免硫醇類化合物與多官能基壓克力單體在室溫下產生自反應,提供較佳的加工性,也具有較穩定的保存性。
以上所公開的內容僅為本發明的優選可行實施例,並非因此侷限本發明的申請專利範圍,所以凡是運用本發明說明書及圖式內容所做的等效技術變化,均包含於本發明的申請專利範圍內。
M:光學膜
S:背光模組
10:量子點膠層
10A:第一表面
10B:第二表面
101:第一聚合物
102:量子點
30:導光單元
30A:入光側
30B:出光側
40:發光單元
401:發光元件
圖1為本發明一具體實施例的光學膜的剖面示意圖。
圖2為本發明一具體實施例的光學膜的製造方法的流程。
圖3為本發明另一具體實施例的光學膜的製造方法的流程。
圖4為本發明一實施例的背光模組的剖面示意圖。
M:光學膜、光學膜
10:量子點膠層
10A:第一表面
10B:第二表面
101:第一聚合物
102:量子點
Claims (10)
- 一種光學膜,其是由一量子點膠層所組成,所述量子點膠層包含一第一聚合物以及分散於所述第一聚合物的複數個量子點;其中,所述第一聚合物包括:1至5wt%的光起始劑;3至20wt%的散射粒子;20至50wt%的硫醇類化合物;5至30wt%的單官能基壓克力單體;20至40wt%的多官能基壓克力單體;1至5wt%的有機矽接枝低聚物;以及500至1500ppm的抑制劑。
- 如請求項1所述的光學膜,其中,所述量子點膠層包括一第一表面以及一第二表面,且所述第一表面以及所述第二表面皆為裸露、未設置一屏蔽層。
- 如請求項1所述的光學膜,其中,所述硫醇類化合物選自於由2,2'-(乙二氧基)二乙硫醇、2,2'-硫二乙硫醇、三羥甲基丙烷三(3-巰基丙酸酯)、聚乙二醇二硫醇、季戊四醇四(3-巰基丙酸酯)、乙二醇雙巰基乙酸酯以及2-巰基丙酸乙酯所組成的群組。
- 如請求項1所述的光學膜,其中,所述單官能基壓克力單體是選自由甲基丙烯酸四氫糠酯、丙烯酸硬脂酯、甲基丙烯酸月桂酯、丙烯酸月桂酯、甲基丙烯酸異冰片酯、丙烯酸十三烷基酯、烷氧基化壬基酚丙烯酸酯、四乙二醇二甲基丙烯酸酯、聚乙二醇(600)二甲基丙烯酸酯、三丙二醇二丙烯酸酯以及乙氧基化(10)雙酚A二甲基丙烯酸酯所組成的群組;且所述多官能基壓克力單體是選自三羥甲基丙烷三丙烯酸酯、 三羥甲基丙烷三甲基丙烯酸酯、乙氧基化(20)三羥甲基丙烷三丙烯酸酯以及季戊四醇三丙烯酸酯所組成的群組。
- 如請求項1所述的光學膜,其中,所述有機矽接枝低聚物是選自於由矽氧烷丙烯酸酯以及矽氧烷環氧樹脂所組成的群組。
- 如請求項1所述的光學膜,其中,所述抑制劑是選自由鄰苯三酚(PYR)、對苯二酚、鄰苯二酚、碘化鉀-碘混合物、受阻酚系抗氧化劑(Hindered phenol antioxidants)、鋁或鐵試劑鹽(N-亞硝基苯基羥胺鹽)(N-nitrosophenyl hydroxylamine ammonium salt,N-nitroso-N-phenylhydroxylamine aluminum salt)、3-丙烯基苯酚、三芳基膦和亞磷酸鹽(triaryl phosphines and phosphites)、膦酸(phosphonic acid)、烯基酚和試劑鹽的組合物(combination of an alkenyl-phenol and cupferronate salt)所組成的群組。
- 一種光學膜的製造方法,包括:將複數個量子點分散於一第一聚合物中,所述第一聚合物包括:1至5wt%的光起始劑;3至20wt%的散射粒子;20至50wt%的硫醇類化合物;5至30wt%的單官能基壓克力單體;20至40wt%的多官能基壓克力單體;1至5wt%的有機矽接枝低聚物;以及500至1500ppm的抑制劑。
- 如請求項7所述的光學膜的製造方法,進一步包括:先將複數個量子點分散於所述單官能基壓克力單體,再加入所述抑制劑。
- 如請求項8所述的光學膜的製造方法,加入所述抑制劑後進一步包括:加入所述硫醇類化合物,再加入所述多官能基壓克力單體混合,最後加入所述光起始劑、所述散射粒子以及所述有機矽接枝低聚物。
- 一種背光模組,其包括:一導光單元,其具有一入光側;至少一發光單元,其對應於所述入光側;以及一光學膜,其對應於所述入光側,並位於所述導光單元與至少一所述發光單元之間,所述光學膜是由一量子點膠層所組成,其包含一第一聚合物以及分散於所述第一聚合物的複數個量子點;其中,所述第一聚合物包括:1至5wt%的光起始劑;3至20wt%的散射粒子;20至50wt%的硫醇類化合物;5至30wt%的單官能基壓克力單體;20至40wt%的多官能基壓克力單體;1至5wt%的有機矽接枝低聚物;以及500至1500ppm的抑制劑。
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CN202011483000.3A CN114621687A (zh) | 2020-12-11 | 2020-12-16 | 光学膜、背光模块及光学膜的制造方法 |
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