201018985 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種集光元件，尤指一種可應用於液晶顯 示器中之光學集光元件。 - 【先前技術】 - 一般而言，液晶顯示器（簡稱「LCD」)之主要結構包含 面板與背光模組兩大部分，其中，面板部分包括透明電極 ©板、液晶、配向膜、彩色濾光片、偏光片以及驅動積體電 路等，而背光模組的部分包含燈管、導光板以及各種光學 膜片等，背光模組的目的主要在於提供液晶顯示器所需之 光源。 為了提升液晶顯示器的亮度、減少熱量蓄積及降低光源 能量損耗，目前業界最常使用的方法為在背光模組中使用 各式各樣的集光元件，例如3M所發展的增亮糢（Brightness Enhancement Film，BEF)或稜鏡片（prism fUm)，其係在厚 φ 度僅25〜250 μηι的聚酯光學薄膜上利用高能UV光將特殊壓 克力樹脂硬化成微細稜鏡結構。而集光元件最主要的功能 在於藉由折射與内部全反射將自導光板（lightguide)或擴散 . 板發出至四面八方之散亂的光線收集，並集中至約±35度 的正視角（On-axis)方向，以提高LCD的輝度。 但目前集光元件在實際的使用上仍會遇到一些問題。例 如，如圖1所示之集光元件10,其基材丨丨上表面大都具有 聚光結構12若此聚光結構12的表面沒有進行任何的保護處 理，在後續的搬放運送過程中或是裁切過程時，便很容易 134326.doc 201018985 因操作不慎而產生到傷或磨損’如此便會使得集光元件的 光學效果受到影響。201018985 IX. Description of the Invention: [Technical Field] The present invention relates to a light collecting element, and more particularly to an optical light collecting element which can be applied to a liquid crystal display. - [Prior Art] - In general, the main structure of a liquid crystal display ("LCD") includes two parts: a panel and a backlight module. The panel portion includes a transparent electrode ©, a liquid crystal, an alignment film, and a color filter. The polarizing film and the driving integrated circuit, etc., and the backlight module comprises a lamp tube, a light guide plate and various optical films, etc. The purpose of the backlight module is mainly to provide a light source required for the liquid crystal display. In order to improve the brightness of the liquid crystal display, reduce the heat accumulation and reduce the energy loss of the light source, the most commonly used method in the industry is to use a variety of light collecting elements in the backlight module, such as the brightness enhancement mode developed by 3M (Brightness Enhancement) Film, BEF) or prism fUm, which is used to harden a special acrylic resin into a fine crucible structure on a polyester optical film having a thickness of only 25 to 250 μm. The most important function of the light collecting element is to collect the scattered light from the lightguide or the diffusing plate through the refraction and internal total reflection, and concentrate it to a positive angle of about ±35 degrees (On- Axis) direction to increase the brightness of the LCD. However, at present, the light collecting components still encounter some problems in actual use. For example, as shown in FIG. 1 , the light collecting element 10 has a concentrating structure 12 on the upper surface of the substrate, and if the surface of the concentrating structure 12 is not subjected to any protection treatment, during the subsequent transport or It is easy to cut the process. 134326.doc 201018985 Injury or wear due to careless operation. This will affect the optical effect of the light collecting element.
而目前業界一般的解決方法，可如圖2所示，在基材上 表面之聚光結構12貼上一層上保護臈14，且在基材下表面 貼上一層下保護膜13來防止到傷，惟這方法具有增加成本 和製程複雜的缺點。另外業界中亦有在聚光結構之另一側 塗佈一層具有凹凸起伏結構9的硬罩層（hard⑶如叩）“的 方式，或如圖3a所示，此方法雖可以保護基材下表面免被 聚光結構12所刮傷，但卻會造絲光結構本體被破壞5(參 圖3b) ’進而影響光學效果。 【發明内容】 有鑑於上述缺點，本發明提供—種集光元件，藉由控制 集光元件上下表面之摩擦係數於特定範圍内，不需貼附保 護膜即可達到防刮的效果，且可維持良好的輝度。 本發明之主要目的在於提供一種集光元件，其包含⑷基 材| (b)位於基材—侧之第-表面，此第-表面具有聚光結 構’及⑷位於基材另一侧之第二表面，其中該第一表面和 =表面間的最大靜摩擦係數，根據jIS K7125標準方法 量測，係介於約0.3至0.7之間。 【實施方式】 在本文中所使用之用語僅為描述所述之實施態樣，並非 用f限制本發明保護範圍。舉例言之，說明書中所使用的 用 g吾 厂一 ，ffA. JU . 示非文中另有明確之解釋，否則用語厂一」 係涵蓋單數及多數形式。 134326.doc 201018985 構在「本二1’柱狀結構係指多峰柱狀結構或單峰柱狀結 所形成之應狀結構」係指由至少兩個柱狀結構彼此重疊 所形成之聯集結構， 且 ^ # A^ 任何兩相鄰柱狀結構間之谷線之高 又糸為此一相鄰柱狀結 「^ 傅T间度較低者之咼度的30%至 95 /〇，早峰柱狀結構則沪ώ留 、J扣由早一個柱狀結構所構成且 僅具有皁一之峰之結構。 在本文巾#鏡柱狀結構」係由兩個傾斜表面所構 成，職斜表面可為曲面或平面，且該二傾斜表面於棱鏡 頂4相乂形成峰’且可各自與相鄰柱狀結構之另一傾斜表 面於底部相交形成谷。 在本文中’ 1形柱狀結構」係由兩個傾斜平面所構 成，此二傾斜平面頂部相交處係純化形成一曲面，且此二 傾斜平面可各自與相鄰柱狀結構之另—傾斜表面於底部相 交形成谷》 在本文中’「線性柱狀結構」係定義為柱狀結構的棱線 φ (ridge)呈直線延伸之柱狀結構。 在本文中’「曲線柱狀結構」係定義為柱狀結構的稜線 _ 1彎曲變化延伸之柱狀結構’該彎曲延伸稜線係形成適當 . 的表面曲率變化，該彎曲延伸稜線之表面曲率變化係以該 曲線柱狀結構高度為基準之〇_2%至100%，較佳係以該曲 線柱狀結構高度為基準之1%至20%。 在本文中，「鉛筆硬度」係指待測樣品表面為一平面， 以Mitsubishi鉛筆，根據JIS K-5400標準方法量測，所測得 之硬度。 134326.doc 201018985 本發明之集光元件，包含一基材；此基材具有第一表面 和第二表面，為避免背光模組於組裝時兩片集光元件相接 觸或在集光元件製造過程中產生堆疊，造成集光元件表面 磨傷，上述第一表面和第二表面間的最大靜摩擦係數，根 據JIS K7125標準方法量測，宜介於約〇3至〇·7之間。當摩 -擦係數小於0.3時’聚光結構容易塌陷，輝度降低，當摩 擦係數大於0.7時，聚光結構太剛硬（stiffiness)，容易刮傷 基材的第二表面或其它元件。 本發明所用之基材之材料可為任何本發明所屬技術領域 具有通常知識者所熟知者’例如玻璃或塑膠。上述塑膠基 材可由一或多個高分子樹脂層所構成。用以構成上述高分 子樹脂層之樹脂之種類並無特殊限制，其例如選自以下群 組：聚酯樹脂（polyester resin)，如聚對苯二曱酸乙二醋 (polyethylene terephthalate，PET)或聚萘二甲酸乙二酯 (polyethylene naphthalate, PEN)、聚丙烯酸酯樹脂 ❿ （Polyacrylate resin)，如聚甲基丙烯酸甲酯（p〇lymethyl methacrylate, PMMA)、聚烯烴樹脂（p〇iyolefin resin)，如 聚乙烯（PE)或聚丙烯（PP)、聚環烯烴樹脂（p〇iycyci〇olefin resin)、聚醯亞胺樹脂（polyimide resin)、聚碳酸g旨樹脂 (polycarbonate resin)、聚胺基曱酸酯樹脂（polyUrethane resin)、三醋酸纖維素（triacetyl cellulose, TAC)、聚乳酸 (Polylactic acid)及其組合’但不以此為限，其中，較佳係 選自聚酯樹脂、聚碳酸酯樹脂及其組合；更佳係聚對苯二 甲酸乙二酯。基材之厚度通常取決於所欲製得之光學產品 134326.doc 201018985 岛衣’ 一般為15微米至300微米。另外，為增加抗刮 性’根據JIS K5400標準方法量測，基材之第一表面和第 一表面不宜同時具有大於HB之鉛筆硬度，換言之，基材 至少一表面具有不大於HB之鉛筆硬度，較佳為基材之第 表面具有不大於HB之錯筆硬度。 本發明之集光元件之第一表面具有聚光結構，上述聚光 結構係用以提供集光元件所欲之光學性質，其形式並無特 ❹ 殊限制’可使用本發明所屬技術領域中具有通常知識者所 熟知之任何方式製備，例如：可與基材一起以一體成形方 式製備，例如以壓印（embossing)、射出（injection)等方式 製付’或使用市售的聚光膜層壓（laminati〇n)於基材上；或 以卷對卷式（ro11 t0 roll)連續生產技術於基材上塗佈膠液固 化’形成具有複數個可提供聚光效果的結構化表面，上述 聚光結構之厚度並無特殊限制，通常係介於約1微米至約 5〇微米之厚度，較佳為5微米至35微米，最佳為15微米至 參 25微米。—般而言，聚光結構的折射率越高，輝度增益效 果越好。 - 根據本發明之一較佳實施態樣，具有該聚光結構之第一 表面的形成方法，係以卷對卷式連續生產技術，於基材一 侧塗佈第一膠液後經固化而形成該聚光結構，且所形成之 具有聚光結構之第一表面，根據JIS K5400標準方法量測 ，具有不大於之鉛筆硬度。 本發明之集光元件之第二表面可為基材原膜之一表面， 或可由任何習知方式於基材上進行加工後製得，例如但不 134326.doc 201018985 限於於基材相對於聚光結構之另一側塗佈膠液固化而形成 一塗層；或以塗佈方式於基材相對於聚光結構之另一側先 塗佈一膠液，再以表面具凹凸結構之滾輪，以壓花方式於 膠液上形成一具有凹凸微結構之塗層。上述塗層之厚度並 • 無特殊限制，通常係介於約〇.5至約3〇微米之間，較佳介 . 於約1至約10微米之間。 為使塗層具有霧度，產生某些程度的光擴散作用，可視 φ 需要使上述膠液包含珠粒（beads)，其例如但不限於：玻璃 珠粒；金屬氧化物珠粒，例如但不限於二氧化鈦（Ή〇2)、 二氧化矽（Si02)、氧化鋅（Zn〇)、氧化鋁（Al2〇3)、氧化鍅 (zr〇2)或其混合物；或塑膠珠粒，例如但不限於丙烯酸酯 樹脂、苯乙烯樹脂、胺基曱酸酯樹脂、矽酮樹脂或其混合 物，較佳為丙烯酸酯樹脂或矽酮樹脂；或其組合。上述珠 粒之形狀並無特殊限制，例如可為球形、菱形、橢圓形、 米粒形、雙凸透鏡形（biconvex ienses)等，其平均粒徑， _ 係介於約1微米至約5 0微来之間，上述珠粒相對於塗層中 膠液固形份之量為每1〇〇重量份膠液固形份約〇1重量份至 - 約丨〇重量伤之珠粒。在基材之第一表面不存在任何結構之 情況下，以JIS K7136標準方法測量，塗層之霧度不小於 3°/〇，較佳為3%至70% » 根據本發明之一較佳實施態樣，集光元件之第二表面之 开’成方法係以卷對卷式連續生產技術，於基材一側塗佈不 含珠粒之第二膠液’後經固化而形成一平滑塗層，且根據 JIS K5400標準方法量測，具有2B〜HB之鉛筆硬度。 134326.doc •11· 201018985 根據本發明之另—較佳實施態樣，集光元件之第二表面 之形成方法係以卷對卷式連續生產技術，於基材一侧塗佈 3塑膠珠粒之第二勝液’固化而形成-非平滑塗層，且根 據JIS K5400標準方法量測，具有卜扭之錯筆硬度且以 JISK7136標準方法測f，塗層之霧度為4%至25%。 • 上述第一膠液和第二膠液可相同或不相同，各自包含至 少一種選自由紫外線固化樹脂、熱固性樹脂、熱塑性樹脂 ❿ 及其混合物所構成群組之樹脂，其中第一膠液較佳為紫外 線固化樹脂；第二膠液較佳為紫外線固化樹脂及熱固性樹 脂之混合物，並藉由加熱和紫外線雙固化（duai curing)方 式處理使开》成之塗層具有卓越的耐熱性和極小的體積收 縮率（shrinkage)。 第一膠液及/或第二膠液可視需要包含任何本發明所屬 技術領域中具有通常知識者已知之添加劑，其例如但不限 於滑劑（slip agent)、稀釋劑（diluent)、無機填料（in〇rganic ❹ flller)、硬化劑（curing agent)、抗靜電劑、整平劑、安定 劑、螢光增白劑或紫外線吸收劑。 - 為增加固化後的潤滑性，第一膠液及/或第二膠液可視 需要包含滑劑。適用於本發明之滑劑係由醯胺樹脂、丙烯 酸酯樹脂、環烷酯類（naphthenates)、矽酮樹脂及脂肪酵樹 月a組成的族群中選出’較佳為環烧酯類或石夕酮樹脂。市售 此類滑劑例子包含：Teg〇公司所生產’商品名為Rad 2300 〇 為避免膠液的分子量過高’黏度太大，以致於操作性變 134326.doc -12- 201018985 差，易於塗佈時有流平性不良等缺點，可視需要添加稀釋 劑，以調整膠液之黏度。另外，添加具烷氧基之稀釋劑可 調整膠液固化後之彈性係數（elastic modulus)使聚光元件之 表面結構具有較佳的柔韌性，因此可增加光學元件的耐磨 性。上述稀釋劑較佳為丙烯酸酯類單體，更佳為單官能基 的丙烯酸酯類單體，適用之稀釋劑例如，但不限於選自以 下群組：（曱基）丙烯酸酯、2-苯氧基乙基丙烯酸酯（2-Phenoxyl Ethyl acrylate)、乙氧基乙氧基乙基丙浠酸酯（2-(2-ethoxy ethoxy )Ethyl acrylate)、三經甲基丙烧三丙稀酸 醋（Trimethylolpropane Triacrylate)、聚乙二酵二丙烯酸醋 (polyethylene glycol diacrylate)、異丙苯基苯氧基乙基丙 烯酸醋（Cumyl Phenoxyl Ethyl Acrylate)、丙氧化新戊二醇 二丙稀酸醋（Propoxylated neopentyl glycol diacrylate)、乙 氧化三經曱基丙烧三丙稀酸醋（Ethoxylated Trimethylolpropane Triacrylate)、丙氧化三經曱基丙娱》三 丙烯酸 S旨（Propoxylated Trimethyloipropane Triacrylate)、 二季戊四醇六丙稀酸醋（Dipentaerythritol Hexaacrylate DPHA)及彼等之組合。市售此類單體例子包含：由Eternal 公司生產，商品名為EM2108®、EM210®、EM211®、 EM224®、EM231®者及由新中村公司所生產，商品名為A-LEN10 或 A-BPEFA 等。 此外，為避免因聚光結構塌陷現象影響光學性質，第一 膠液及/或第二膠液可視需要於膠液中添加無機填料，以 避免因聚光結構塌陷現象影響光學性質。此外，無機填料 134326.doc -13- 201018985 亦具有提升液晶顯示器面板之輝度（brightness)之功效。可 用於本發明之無機填料係為本發明所屬技術領域中具有通 常知識者所熟知者，其例如但不限於氧化鋅、二氧化矽、 鈦酸勰、氧化錯、氧化鋁、碳酸鈣、二氧化鈦、硫酸鈣、 - 硫酸鋇或其混合物，較佳為二氧化鈦、氧化錘、二氧化矽 - 、氧化鋅或其混合物。上述無機填料具有約1 〇奈米至約 350奈米之粒徑大小’較佳為介於約5〇奈米至約ι5〇奈米之 間。 〇 , 為了提尚分子與分子間的交聯度（crosslinking)，第一膠 液及/或第一膠液可視需要添加硬化劑’其例如但不限於 異氰酸醋（isocyanate)、二異氰酸醋（diisocyanate)或聚異氰 酸酯（polyisocyanate) 適用於本發明之紫外線固.化樹脂之實例例如包括丙歸酸 Si類樹脂（acrylate resins) ’上述丙烯酸酯類樹脂之種類例 如但不限於甲基丙浠酸醋樹脂（methacrylate resin)、丙稀 ❹ 酸胺基甲酸酯（urethane acrylate)樹脂、聚酯丙烯酸醋 (polyester acrylate)樹脂、環氧丙稀酸醋（epoxy acrylate)樹 . 脂或其混合物，較佳為曱基丙稀酸醋樹脂。 可用於本發明之熱固性樹脂，其平均分子量一般介於約 1〇4至約2xl06之間，較佳介於約2xl04至約3xl05之間，更 佳介於約4xl04至約105之間。本發明之熱固性樹脂可選自 含有羧基（-COOH)及/或羥基（-OH)之聚酯樹脂、環氧樹脂 、聚（甲基）丙烯酸酯樹脂、聚醯胺樹脂、氟素樹脂、聚醯 亞胺樹脂、聚胺基曱酸酯樹脂、醇酸樹脂（alkyd resin)及 134326.doc • 14· 201018985 其混合物所組成之群組，較佳為含有羧基及/或羥基之聚（ 甲基）丙稀酸酯樹脂。 可用於本發明之熱塑性樹脂可選自聚酯樹脂丨聚曱基丙 烯酸酯樹脂，如聚甲基丙烯酸甲酯（PMMA);及彼等之混 合物所組成之群組。 ' 當使用熱固性樹脂或熱塑性樹脂時，可視需要添加溶 劑。可用於本發明之溶劑，係熟悉此項技術之人士所熟知 Φ 者，其例如可為苯類、酯類或酮類或其混合物。苯類溶劑 之非限制性實例包括，苯、鄰二甲苯、間二甲苯、對二曱 笨 '二曱基苯或苯乙烯或其混合物。酯類溶劑之非限制性 實例如包括，乙酸乙酯、乙酸丁酯、碳酸二乙酯、曱酸乙 西曰、乙酸甲酯、乙酸乙氧基乙酯、乙酸乙氧基丙酯或單甲 基醚丙二醇酯或其混合物。酮類溶劑之非限制性實例包括 丙酮、甲基乙基嗣或曱基異丁基酮或其混合物。 根據本發明之一具體實施例，用於形成上述第一表面之 ❿ 聚光結構之第一膠液為丙烤酸酯類樹脂，其包含聚合單 體、交聯劑（crosslinking agent)和光起始劑。適當之聚合 單體例如包括環氧二丙烯酸酯（epoxy diacrylate)、鹵化環 氧二丙稀酸酯（halogenated epoxy diacrylate)、甲基丙稀酸 甲酯（methyl methacrylate)、丙烯酸異冰片酯（is〇b〇rnyl acrylate)、2_ 本乳基乙基丙稀酸 g旨（2_phenoxy ethyl acrylate)、丙烯醯胺（acrylamide)、苯乙烯（styrene)、齒化 苯乙稀（halogenated styrene)、丙烯酸（acrylic acid)、（曱 基）丙烯腈（(meth)acrylonitrile)、芴衍生物二丙烯酸酯 134326.doc 15 201018985 (fluorene derivative diacrylate)、丙浠酸聯苯基環氧乙 g 旨 (biphenylepoxyethyl acrylate)、聯苯氧基乙基丙浠酸酯 (Polyethylene glycol o-phenylphenyl ether acrylate)、函化 丙婦酸聯苯基環氧乙醋（halogenated biphenylepoxyethyl acrylate)、烧氧化環氧二丙烯酸酯（alkoxylated epoxy diacrylate)、i化烧氧化環氧二丙稀酸酯（halogenated alkoxylated epoxy diacrylate)、脂肪族胺基甲酸酯二丙稀 酸醋（aliphatic urethane diacrylate)、脂肪族胺基曱酸酯六 丙稀酸醋（aliphatic urethane hexaacrylate)、芳香族胺基曱 酸醋六丙稀酸醋（aromatic urethane hexaacrylate)、雙盼 A 環氧二丙稀酸S旨（bisphenol-A epoxy diacrylate)、紛搭清漆 環氧丙烯酸醋（novolac epoxy acrylate)、聚醋丙嫦酸醋 (polyester acrylate)、聚酯二丙稀酸酯（polyester diacrylate)、丙稀酸酯封端的胺基甲酸酯寡聚物（acrylate-capped urethane oligomer) 、 或 彼等之 混合物 。較佳 之聚合 單體係鹵化環氧二丙烯酸酯、甲基丙烯酸甲酯、2-苯氧基 乙基丙烯酸酯、芴衍生物二丙烯酸酯、聯苯氧基乙基丙烯 酸酯、脂肪族胺基甲酸酯二丙烯酸酯、脂肪族胺基甲酸酯 六丙烯酸酯、或芳香族胺基甲酸酯六丙烯酸酯。 市售聚合單體之實例包括：由Sartomer公司生產，商品 名為 SR454®、SR494®、SR9020®、SR9021® 或 SR9041® 者 ;由Eternal公司生產，商品名為EM210®、EM2108®者； 由 UCB公司生產，商品名為 Ebecryl 600®、Ebecryl 830®、 Ebecryl 3605®或Ebecryl 6700®者；及由新中村公司所生產 134326.doc -16- 201018985 ，商品名為A-LEN10或A-BPEFA等。 適用之交聯劑可為單體或寡聚物，例如為具有一或多個 官能基之丙烯酸酯，較佳係為具多官能基者，以提高玻璃 轉化溫度。上述具有一或多個官能基之丙烯酸酯之種類係 * 為本發明所屬技術領域中具有通常知識者所熟知者，例如 - 但不限於：（甲基）丙烯酸酯；胺基甲酸酯丙烯酸酯 (urethane acrylate)，如脂肪族胺基甲酸S旨丙浠酸醋 (aliphatic urethane acrylate)、脂肪族胺基曱酸醋六丙稀酸 酯（aliphatic urethane hexaacrylate)或芳香族胺基甲酸酯六 丙烯酸g旨（aromatic urethane hexaacrylate);聚醋丙稀酸酉旨 (polyester acrylate)，如聚醋二丙浠酸 S旨（polyester diacrylate);環氧丙稀酸S旨（epoxy acrylate)，如雙酌1 A環氧 二丙稀酸醋（bisphenol-A epoxy diacrylate)、2-經基-3-苯氧 丙基丙烯酸酯；酚醛環氧丙烯酸酯（novolac epoxy acrylate);較佳為（甲基）丙歸酸酯，其可具有二或多個官 n 能基，較佳係為具多官能基者。 適用於本發明之（甲基）丙烯酸酯之實例，例如但不限 於：三丙二醇二（甲基）丙烯酸S旨（tripropylene glycol di(meth)acrylate)、1,4- 丁 二醇二（甲基）丙稀酸酯（1，4-butanediol di(meth)acrylate)、1，6-己二醇二（曱基）丙稀酸 醋（l，6-hexanediol di(meth)acrylate)、聚乙二醇二（甲基）丙 烯酸醋（polyethyleneglycol di(meth)acrylate)、浠丙基化二 (曱基）丙稀酸環己醋 （allylated cyclohexyl di(meth)acrylate)、二（曱基）丙稀酸異氰脲酸酯 134326.doc -17- 201018985 (isocyanurate di(meth)acrylate)、乙氧基化三經甲基丙炫三 (甲基）丙稀酸醋（ethoxylated trimethylol propane tri(meth)acrylate)、丙氧基化甘油三（甲基）丙稀酸醋 (propoxylated glycerol tri(meth)acrylate)、三經甲基丙烧三 (甲基）丙浠酸醋（trimethylol propane tri(meth)acrylate)、三 (丙烯氧乙基）異氰酸脲醋（tris(acryloxyethyl) isocyanurate) 或彼等之混合物。 可用於本發明之市售丙稀酸酯包括：由Sartomer公司生 產，商品名為 SR454®、SR494®、SR9020®、SR9021® 或 SR9041®者；由Eternal公司生產，商品名為624-100®者、 6161-100®者；及由UCB公司生產，商品名為Ebecryl 600® 、Ebecryl 830®、Ebecryl 3605® 或 Ebecryl 6700®者等。 適用於本發明之光起始劑並無特殊限制，係經光照射後 會產生自由基，而透過自由基之傳遞引發聚合反應者。其 例如可選自二苯甲酮（benzophenone)、二苯乙醇嗣 (benzoin)、二苯乙二酮（benzil)、2,2-二甲氧基-1,2-二苯基 乙-1-酮（2,2-dimethoxy-l，2-diphenylethan-l-one)、1-經基 環己基苯基酮（1-hydroxy cyclohexyl phenyl ketone)、 2,4,6-三甲基苯曱醯基二苯基膦氧彳匕物（2,4,6-trimethylbenzoyl diphenyl phosphine oxide; TPO)及其組合 所構成群組，較佳係二苯甲酮。 上述的聚光結構形式為本發明所屬技術領域中具有通常 知識者所熟知者，其例如但不限於：規則或不規則的柱狀 結構、圓錐狀結構、立體角結構、橘瓣形塊狀結構、透鏡 134326.doc -18- 201018985 狀結構及膠囊狀社娃+ > s 狀、、，σ構或其組合等，較佳為規則的柱狀結構 。該等柱狀結構可為線性⑽㈣、曲線（serpentine)或折線 (g、g)較佳為線性，且相鄰之兩線性柱狀結構可平行 4不平#該等柱狀結構之峰高度可不沿延伸方向變化或 伸方向變化。上述柱狀結構之♦高度沿延伸方向變化 係和X柱狀、構中至少有部分位置之高度係隨機或規則性 二構主軸位置變化，其變化幅度至少為標稱高度（或平 ❹ 句门度）之百刀之二，較佳其變化幅度為該標稱高度之百 分之五至百分之五十之間。 本發明所使用之柱狀結構可等高或不等高、等寬或不等 寬，其高度取決於所欲得光學產品之需求，一般係介於約 1微米至約崎米之間之範圍，較佳介於約5微米至約35微 米之間之範圍，更佳係介於約15微米至約30微米之間之範 圍。At present, the general solution in the industry can be as shown in FIG. 2, a protective layer 14 is attached to the concentrating structure 12 on the upper surface of the substrate, and a protective film 13 is applied on the lower surface of the substrate to prevent injury. However, this method has the disadvantage of increasing cost and complicated process. In addition, in the industry, a hard cover layer (hard (3) such as ruthenium) having a undulating structure 9 is coated on the other side of the concentrating structure, or as shown in FIG. 3a, the method can protect the lower surface of the substrate. It is not scratched by the concentrating structure 12, but the body of the ray-forming structure is destroyed 5 (refer to FIG. 3b)', thereby affecting the optical effect. [Invention] In view of the above disadvantages, the present invention provides a concentrating element, By controlling the friction coefficient of the upper and lower surfaces of the light collecting element within a specific range, the anti-scratch effect can be achieved without attaching a protective film, and a good luminance can be maintained. The main object of the present invention is to provide a light collecting element including (4) a substrate | (b) a first surface on the substrate-side, the first surface having a concentrating structure' and (4) a second surface on the other side of the substrate, wherein the first surface and the surface are the largest The coefficient of static friction, measured according to the standard method of JIS K7125, is between about 0.3 and 0.7. [Embodiment] The terms used herein are merely illustrative of the described embodiments, and do not limit the scope of the invention. Example In other words, the use of gu factory one, ffA. JU. used in the specification indicates that there is a clear explanation in the text, otherwise the term "one language" covers both singular and plural forms. 134326.doc 201018985 The "2nd columnar structure refers to a multi-peak columnar structure or a unimodal columnar junction formed by a conformal structure" means a union formed by overlapping at least two columnar structures. Structure, and ^ # A^ The height of the valley line between any two adjacent columnar structures is 30% to 95 /〇 of the width of the adjacent columnar junction "^^ The early peak columnar structure is composed of a columnar structure and has a structure of only a peak of soap. In this paper, the "mirror columnar structure" is composed of two inclined surfaces, and the inclined surface is It may be a curved surface or a plane, and the two inclined surfaces form a peak at the prism top 4 and may each form a valley with another inclined surface of the adjacent columnar structure at the bottom. In this paper, the '1-shaped columnar structure' is composed of two inclined planes, and the intersection of the tops of the two inclined planes is purified to form a curved surface, and the two inclined planes can respectively be separated from the other inclined surfaces of the adjacent columnar structures. Forming a valley at the bottom intersecting In this paper, ''linear columnar structure'' is defined as a columnar structure in which the ridgeline φ (ridge) of the columnar structure extends in a straight line. In the present context, 'the curved columnar structure' is defined as the ridge line of the columnar structure _ 1 the columnar structure of the curved extension extending. The curved ridge line is formed to form a suitable surface curvature change, and the surface curvature of the curved extended ridge line is changed. 〇_2% to 100% based on the height of the curved columnar structure, preferably from 1% to 20% based on the height of the curved columnar structure. In the present context, "pencil hardness" means that the surface of the sample to be tested is a flat surface, and the hardness is measured by a Mitsubishi pencil according to the standard method of JIS K-5400. 134326.doc 201018985 The light collecting component of the present invention comprises a substrate; the substrate has a first surface and a second surface, in order to avoid contact of the two light collecting elements in the assembly of the backlight module or in the manufacturing process of the light collecting element The stack is generated to cause surface abrasion of the light collecting element, and the maximum static friction coefficient between the first surface and the second surface is measured according to the standard method of JIS K7125, preferably between about 〇3 and 〇7. When the friction coefficient is less than 0.3, the concentrating structure is liable to collapse and the luminance is lowered. When the friction coefficient is more than 0.7, the condensing structure is too stiff and easily scratches the second surface or other components of the substrate. The material of the substrate used in the present invention may be any one of ordinary skill in the art to which the present invention pertains, such as glass or plastic. The above plastic substrate may be composed of one or more polymer resin layers. The kind of the resin for constituting the above polymer resin layer is not particularly limited, and is, for example, selected from the group consisting of a polyester resin such as polyethylene terephthalate (PET) or Polyethylene naphthalate (PEN), polyacrylate resin, such as polymethyl methacrylate (PMMA), polyolefin resin (p〇iyolefin resin), Such as polyethylene (PE) or polypropylene (PP), polycyclic olefin resin, polyimide resin, polycarbonate resin, polyamine ruthenium Polyurethane resin, triacetyl cellulose (TAC), polylactic acid (Polylactic acid) and combinations thereof' are not limited thereto, and are preferably selected from the group consisting of polyester resins and polycarbonates. Resin and combinations thereof; more preferably polyethylene terephthalate. The thickness of the substrate generally depends on the optical product to be produced 134326.doc 201018985 Islandwear' is typically 15 microns to 300 microns. In addition, in order to increase the scratch resistance, the first surface and the first surface of the substrate are not suitable to have a pencil hardness greater than HB at the same time according to the JIS K5400 standard method. In other words, at least one surface of the substrate has a pencil hardness of not more than HB. Preferably, the first surface of the substrate has a erroneous pen hardness of no more than HB. The first surface of the light collecting element of the present invention has a light collecting structure for providing the desired optical properties of the light collecting element, and the form thereof is not particularly limited, and the present invention has the technical field of the present invention. It is usually prepared by any means known to the skilled person, for example, by integral molding with a substrate, for example, by embossing, injection, or the like, or by using a commercially available concentrating film laminate. (laminati〇n) on a substrate; or in a roll-to-roll (ro11 t0 roll) continuous production technique on a substrate to apply a glue cure to form a structured surface having a plurality of concentrating effects, the above-mentioned poly The thickness of the light structure is not particularly limited and is usually from about 1 μm to about 5 μm, preferably from 5 μm to 35 μm, most preferably from 15 μm to 25 μm. In general, the higher the refractive index of the concentrating structure, the better the luminance gain effect. - According to a preferred embodiment of the present invention, the first surface of the concentrating structure is formed by a roll-to-roll continuous production technique, and the first glue is applied to one side of the substrate and then cured. The concentrating structure is formed, and the first surface having the condensing structure is formed, and has a pencil hardness of not more than that measured according to the JIS K5400 standard method. The second surface of the light collecting member of the present invention may be one surface of the original film of the substrate, or may be processed by processing on a substrate in any conventional manner, for example, but not 134326.doc 201018985 is limited to the substrate relative to the poly The other side of the light structure is cured to form a coating layer; or a coating method is applied to the substrate on the other side of the concentrating structure to apply a glue, and then the surface has a concave-convex structure of the roller, A coating having a concave-convex microstructure is formed on the glue by embossing. The thickness of the above coating layer is not particularly limited and is usually between about 〇5 and about 3 Å, preferably between about 1 and about 10 μm. In order to impart a degree of light diffusion to the coating, it is desirable to have the above-mentioned glue contain beads, such as, but not limited to, glass beads; metal oxide beads, for example, but not Limited to titanium dioxide (Ή〇2), cerium oxide (SiO 2 ), zinc oxide (Zn 〇 ), aluminum oxide (Al 2 〇 3), cerium oxide (zr 〇 2) or a mixture thereof; or plastic beads, such as but not limited to The acrylate resin, the styrene resin, the amino phthalate resin, the fluorenone resin or a mixture thereof is preferably an acrylate resin or an fluorenone resin; or a combination thereof. The shape of the beads is not particularly limited, and may be, for example, a spherical shape, a rhombus shape, an elliptical shape, a rice grain shape, a biconvex shape, or the like, and the average particle diameter thereof is from about 1 micrometer to about 50 micrometers. The amount of the above-mentioned beads relative to the solid content of the glue in the coating is about 1 part by weight per 1 part by weight of the solid portion of the glue to about - about 丨〇 weight-injured beads. In the case where there is no structure on the first surface of the substrate, the haze of the coating is not less than 3°/〇, preferably from 3% to 70%, as measured by the standard method of JIS K7136. In an embodiment, the second surface of the light collecting element is formed by a roll-to-roll continuous production technique, and a second glue containing no beads is coated on one side of the substrate to form a smoothing. The coating was measured and measured according to JIS K5400 standard method, and had a pencil hardness of 2B to HB. 134326.doc •11· 201018985 According to another preferred embodiment of the present invention, the second surface of the light collecting element is formed by a roll-to-roll continuous production technique, and 3 plastic beads are coated on one side of the substrate. The second winning liquid 'cured to form a non-smooth coating, and measured according to the JIS K5400 standard method, has the wrong pen hardness and is measured by the JIS K7136 standard method, the haze of the coating is 4% to 25% . • The first glue and the second glue may be the same or different, each comprising at least one resin selected from the group consisting of ultraviolet curable resins, thermosetting resins, thermoplastic resins, and mixtures thereof, wherein the first glue is preferably It is an ultraviolet curing resin; the second glue is preferably a mixture of an ultraviolet curing resin and a thermosetting resin, and is treated by heating and ultraviolet double curing to provide excellent heat resistance and minimal coating. Volume shrinkage. The first glue and/or the second glue may optionally comprise any additives known to those of ordinary skill in the art, such as, but not limited to, slip agents, diluents, inorganic fillers (for example, but not limited to, slip agents, diluents) In〇rganic ❹ flller), curing agent, antistatic agent, leveling agent, stabilizer, fluorescent whitening agent or ultraviolet absorber. - To increase the lubricity after curing, the first glue and/or the second glue may optionally contain a slip agent. The slip agent suitable for use in the present invention is selected from the group consisting of a guanamine resin, an acrylate resin, a naphthenates, an anthrone resin, and a fatty yeast tree a, preferably a ring-burning ester or a stone eve. Ketone resin. Examples of such commercially available slip agents include: Teg〇 produced by the company's trade name Rad 2300 〇 To avoid excessive molecular weight of the glue, the viscosity is too large, so that the operability is 134326.doc -12- 201018985 Poor, easy to coat When the cloth has the disadvantages of poor leveling, it is necessary to add a thinner to adjust the viscosity of the glue. In addition, the addition of the alkoxy-containing diluent adjusts the elastic modulus of the glue to cure, so that the surface structure of the concentrating element has better flexibility, thereby increasing the wear resistance of the optical element. The above diluent is preferably an acrylate monomer, more preferably a monofunctional acrylate monomer, and a suitable diluent such as, but not limited to, selected from the group consisting of (indenyl) acrylate, 2-benzene 2-Phenoxyl Ethyl acrylate, 2-(2-ethoxy ethoxy) Ethyl acrylate, trimethyl methacrylate triacetate (Trimethylolpropane Triacrylate), polyethylene glycol diacrylate, Cumyl Phenoxyl Ethyl Acrylate, propoxylated neopentyl propylene glycol (Propoxylated neopentyl) Glycol diacrylate), Ethoxylated Trimethylolpropane Triacrylate, Propoxylated Trimethyloipropane Triacrylate, Dipentaerythritol Hexaacetate (Propoxylated Trimethyloipropane Triacrylate) Dipentaerythritol Hexaacrylate DPHA) and combinations thereof. Examples of commercially available monomers include those manufactured by Eternal under the trade names EM2108®, EM210®, EM211®, EM224®, EM231® and manufactured by Shin-Nakamura, under the trade name A-LEN10 or A-BPEFA. Wait. In addition, in order to avoid the optical properties caused by the collapse phenomenon of the concentrating structure, the first glue and/or the second glue may be added with an inorganic filler in the glue to avoid affecting the optical properties due to the collapse phenomenon of the concentrating structure. In addition, the inorganic filler 134326.doc -13- 201018985 also has the effect of improving the brightness of the liquid crystal display panel. The inorganic fillers useful in the present invention are well known to those of ordinary skill in the art to which the present invention pertains, such as, but not limited to, zinc oxide, cerium oxide, barium titanate, oxidized, alumina, calcium carbonate, titanium dioxide, Calcium sulfate, - barium sulfate or a mixture thereof, preferably titanium dioxide, oxidized hammer, ceria-, zinc oxide or a mixture thereof. The above inorganic filler has a particle size of from about 1 〇 to about 350 nm, preferably from about 5 〇 to about 〇5 纳米. 〇, in order to improve the cross-linking between molecules, the first glue and/or the first glue may be added with a hardener as needed, such as, but not limited to, isocyanate, diisocyanate. Diisocyanate or polyisocyanate Examples of the ultraviolet-curable resin suitable for use in the present invention include, for example, acrylate resins. The type of the above acrylate-based resin is, for example but not limited to, methyl acrylate. Methacrylate resin, urethane acrylate resin, polyester acrylate resin, epoxy acrylate tree, lipid or mixture thereof Preferably, it is a mercapto acrylate resin. The thermosetting resins useful in the present invention generally have an average molecular weight of from about 1 〇 4 to about 2 x 10 6 , preferably from about 2 x 10 4 to about 3 x 105, more preferably from about 4 x 10 4 to about 105. The thermosetting resin of the present invention may be selected from a polyester resin containing a carboxyl group (-COOH) and/or a hydroxyl group (-OH), an epoxy resin, a poly(meth)acrylate resin, a polyamide resin, a fluororesin, and a poly An imine resin, a polyamine phthalate resin, an alkyd resin, and 134326.doc • 14· 201018985 A group consisting of a mixture thereof, preferably a poly(methyl group) having a carboxyl group and/or a hydroxyl group. ) acrylate resin. The thermoplastic resin usable in the present invention may be selected from the group consisting of polyester resin phthalocyanurate resins such as polymethyl methacrylate (PMMA); and mixtures thereof. When using a thermosetting resin or a thermoplastic resin, a solvent may be added as needed. Solvents useful in the present invention are those well known to those skilled in the art and may be, for example, benzenes, esters or ketones or mixtures thereof. Non-limiting examples of the benzene-based solvent include benzene, o-xylene, m-xylene, p-quinone-dinonylbenzene or styrene or a mixture thereof. Non-limiting examples of ester solvents include, for example, ethyl acetate, butyl acetate, diethyl carbonate, ethenic acid, methyl acetate, ethoxyethyl acetate, ethoxypropyl acetate or monomethyl Ethyl ether propylene glycol ester or a mixture thereof. Non-limiting examples of ketone solvents include acetone, methyl ethyl hydrazine or decyl isobutyl ketone or mixtures thereof. According to a specific embodiment of the present invention, the first glue for forming the 聚 concentrating structure of the first surface is a propane acrylate resin comprising a polymerizable monomer, a crosslinking agent, and a light start. Agent. Suitable polymeric monomers include, for example, epoxy diacrylate, halogenated epoxy diacrylate, methyl methacrylate, isobornyl acrylate (is〇) B〇rnyl acrylate), 2_ 2_phenoxy ethyl acrylate, acrylamide, styrene, halogenated styrene, acrylic acid , (meth)acrylonitrile (meth) acrylonitrile, hydrazine derivative diacrylate 134326.doc 15 201018985 (fluorene derivative diacrylate), biphenylepoxyethyl acrylate, biphenyl Polyethylene glycol o-phenylphenyl ether acrylate, halogenated biphenylepoxyethyl acrylate, alkoxylated epoxy diacrylate, i Halogenated alkoxylated epoxy diacrylate, aliphatic urethane aliacetic urethane Diacrylate), aliphatic urethane hexaacrylate, aromatic urethane hexaacrylate, double expectant A epoxy diacrylate (bisphenol-A epoxy diacrylate), varnished with novolac epoxy acrylate, polyester acrylate, polyester diacrylate, acrylate-terminated An acrylate-capped urethane oligomer, or a mixture thereof. Preferred polymerized single system halogenated epoxy diacrylate, methyl methacrylate, 2-phenoxyethyl acrylate, hydrazine derivative diacrylate, biphenyloxyethyl acrylate, aliphatic amine group A An acid ester diacrylate, an aliphatic urethane hexaacrylate, or an aromatic urethane hexaacrylate. Examples of commercially available polymerized monomers include those manufactured by Sartomer under the trade names SR454®, SR494®, SR9020®, SR9021® or SR9041®; manufactured by Eternal under the trade names EM210®, EM2108®; by UCB Produced by the company under the trade names Ebecryl 600®, Ebecryl 830®, Ebecryl 3605® or Ebecryl 6700®; and produced by Xinzhongcun Company 134326.doc -16- 201018985, trade name A-LEN10 or A-BPEFA. Suitable crosslinking agents can be monomers or oligomers, such as acrylates having one or more functional groups, preferably polyfunctional groups, to increase the glass transition temperature. The above-described types of acrylates having one or more functional groups are known to those of ordinary skill in the art to which the present invention pertains, for example, but not limited to: (meth) acrylates; urethane acrylates (urethane acrylate), such as aliphatic urethane acrylate, aliphatic urethane hexaacrylate or aromatic urethane hexaacrylate g (aromatic urethane hexaacrylate); polyester acrylate, such as polyester diacrylate; epoxy acrylate, such as double s Abisphenol-A epoxy diacrylate, 2-carbyl-3-phenoxypropyl acrylate; novolac epoxy acrylate; preferably (meth) propyl An acid ester which may have two or more pendant n-energy groups, preferably one having a polyfunctional group. Examples of (meth) acrylates suitable for use in the present invention, such as, but not limited to, tripropylene glycol di(meth)acrylate, 1,4-butanediol di(meth)acrylate 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, poly(ethylene) Polyethyleneglycol di(meth)acrylate,allylated cyclohexyl di(meth)acrylate, bis(indenyl)acrylic acid Isocyanurate 134326.doc -17- 201018985 (isocyanurate di(meth)acrylate), ethoxylated trimethylol propane tri(meth)acrylate , propoxylated glycerol tri(meth)acrylate, trimethylol propane tri(meth)acrylate, A mixture of tris(acryloxyethyl)isocyanurate or a mixture thereof. Commercially available acrylates useful in the present invention include those manufactured by Sartomer under the tradenames SR454®, SR494®, SR9020®, SR9021® or SR9041®; manufactured by Eternal under the tradename 624-100® , 6161-100®; and manufactured by UCB under the trade names Ebecryl 600®, Ebecryl 830®, Ebecryl 3605® or Ebecryl 6700®. The photoinitiator to be used in the present invention is not particularly limited, and a radical is generated by light irradiation, and a polymerization reaction is initiated by the transfer of a radical. It may, for example, be selected from the group consisting of benzophenone, benzoin, benzil, 2,2-dimethoxy-1,2-diphenylethyl-1- Ketone (2,2-dimethoxy-l,2-diphenylethan-l-one), 1-hydroxy cyclohexyl phenyl ketone, 2,4,6-trimethylphenyl fluorenyl A group consisting of 2,4,6-trimethylbenzoyl diphenyl phosphine oxide (TPO) and combinations thereof is preferably benzophenone. The above-mentioned concentrating structure forms are well known to those skilled in the art to which the present invention pertains, for example but not limited to: regular or irregular columnar structures, conical structures, solid angle structures, orange-shaped block structures Lens 134326.doc -18- 201018985 Shaped structure and capsule-like body gamma + > s shape, σ structure or a combination thereof, etc., preferably a regular columnar structure. The columnar structures may be linear (10) (four), curved (serpentine) or broken lines (g, g) preferably linear, and the adjacent two linear columnar structures may be parallel 4 uneven #the peak height of the columnar structures may not The direction of extension changes or the direction of extension changes. The height of the columnar structure ♦ the height along the extension direction and the X-column, the height of at least some of the positions of the structure is a random or regular two-axis spindle position change, and the variation range is at least the nominal height (or the flat sentence) The second measure of the degree is preferably between 5% and 50% of the nominal height. The columnar structures used in the present invention may be of equal height or unequal height, equal width or unequal width, the height of which depends on the desired optical product, and is generally in the range of from about 1 micron to about s. Preferably, it is in the range of between about 5 microns and about 35 microns, more preferably in the range of between about 15 microns and about 30 microns.
本發明之聚光結構之柱狀結構包含至少一單峰柱狀結 構’本發明聚光結構之柱狀結構可為弧形柱狀結構、㈣ 柱狀結構或其混合。為兼具高輝度和抗到性，弧形柱狀結 構頂部之曲率半徑不大於4微米’較佳介於❶」微米至增 米之間’各個柱狀結構之曲率半徑，彼此可相同或不相 同。上述柱狀結構較佳係為對稱柱狀結構，使用對稱柱狀 結構不但可簡化加工方法且較易控制集光效果。本發明所 使用之稜鏡柱狀結構或㈣柱狀結構之頂角角度可彼此相 同或不㈣’其係介於約40。至約12〇。之間，較佳介於約 60°至約120。之間。 134326.doc •19· 201018985 種=明之聚光結構包含兩種(例如以χιΑχ2表示)或兩 等柱狀：::ΓX2,X3,…表示)之不同的柱狀結構時，該 狀、4為多峰柱狀結構或單峰柱狀結構4可以任何 ^之順序排列，亦即，可為—隨機結構，其排列方式例 但不限於：X丨X丨吻㈣、χ丨XAX丨X2等；亦可為一重複 構’其排列方式例如但不限於：X1X2X邮…、 術㈣㈣成之重複排The columnar structure of the concentrating structure of the present invention comprises at least one unimodal columnar structure. The columnar structure of the concentrating structure of the present invention may be an arcuate columnar structure, (4) a columnar structure or a mixture thereof. In order to have both high luminance and resistance, the radius of curvature of the top of the curved columnar structure is not more than 4 micrometers, preferably between 微米 and micrometers, and the radius of curvature of each columnar structure may be the same or different from each other. . The above columnar structure is preferably a symmetric columnar structure, and the use of the symmetric columnar structure not only simplifies the processing method but also facilitates the control of the light collecting effect. The apex angle of the columnar structure or the (iv) columnar structure used in the present invention may be the same or not (four)' of the system of about 40. To about 12 baht. Preferably, it is between about 60° and about 120. between. 134326.doc •19· 201018985 species = Ming concentrating structure contains two (for example, χιΑχ2) or two columnar:: ΓX2, X3, ...) different columnar structure, the shape, 4 is The multi-peak columnar structure or the unimodal columnar structure 4 may be arranged in any order, that is, may be a random structure, and the arrangement thereof is not limited to: X丨X丨 kiss (four), χ丨XAX丨X2, and the like; It can also be a repeating structure, such as but not limited to: X1X2X mail..., surgery (four) (four) into a repeating row
根據本發明之一較佳實施態樣，聚光結構包含複數個稜 鏡柱狀結構，該等柱狀結構為線性柱狀結構且互相平行， 如圖4所不。圖4之實施態樣中聚光結構41之柱狀結構為等 尚、等寬且具有相同之頂角角度之單峰稜鏡柱狀結構411。 根據本發明之另-較佳實施態樣，聚光結構包含複數個 柱狀結構，該等柱狀結構為線性柱狀結構，且部分柱狀結 構之峰高度沿延伸方向變化，如圖5所示。該聚光結構之 柱狀結構為等高、等寬且具有相同之頂角角度之單峰稜鏡 柱狀結構。且該等柱狀結構包含由峰高度沿延伸方向變化 之單峰線性柱狀結構340(Xl)及峰高度不沿延伸方向變化之 單峰線性柱狀結構330(Χ2)所構成’該等柱狀結構以相互交 替之重複結構排列（ΧιΧ2χιΧ2)。 根據本發明之再一較佳實施態樣，聚光結構包含複數個 柱狀結構’該等柱狀結構為線性柱狀結構，至少兩個以上 的柱狀結構彼此互不平行，藉此降低光學干涉現象。上述 互不平行之柱狀結構可為互不平行之稜鏡柱狀結構、互不 134326.doc -20· 201018985 平行之弧形柱狀結構，互不平行之稜鏡柱狀結構及弧形柱 狀結構或彼等之組合。上述不平行之柱狀結構於微結構層 中可呈已相交或未相交之形式。圖6為一具有互不平行之 稜鏡柱狀結構之微結構層之示意圖（俯視圖）。如圖6所示， 本發明光學膜之微結構層可包含互不平行之柱狀結構⑽ 如：已相交之不平行柱狀結構61、未相交之不平行柱狀結 構62)及相互平行之柱狀結構63。According to a preferred embodiment of the present invention, the concentrating structure comprises a plurality of prismatic columns, the columnar structures being linear columnar structures and parallel to each other, as shown in Fig. 4. In the embodiment of Fig. 4, the columnar structure of the concentrating structure 41 is a monolithic columnar structure 411 which is equal, equidistant, and has the same apex angle. According to another preferred embodiment of the present invention, the concentrating structure comprises a plurality of columnar structures, the columnar structures are linear columnar structures, and the peak heights of the partial columnar structures vary along the extending direction, as shown in FIG. Show. The columnar structure of the concentrating structure is a single-peak 柱 columnar structure of equal height, equal width, and the same apex angle. And the columnar structures comprise a unimodal linear columnar structure 340 (Xl) whose peak height varies along the extending direction and a unimodal linear columnar structure 330 (Χ2) whose peak height does not vary along the extending direction. The structures are arranged in alternating repeating structures (ΧιΧ2χιΧ2). According to still another preferred embodiment of the present invention, the concentrating structure comprises a plurality of columnar structures. The columnar structures are linear columnar structures, and at least two of the columnar structures are not parallel to each other, thereby reducing optical Interference phenomenon. The above-mentioned mutually non-parallel columnar structures may be mutually non-parallel columnar structures, mutually parallel argon-shaped columnar structures, mutually non-parallel columnar structures and curved columns. Structure or a combination of them. The above non-parallel columnar structures may be in the form of intersected or unintersected in the microstructured layer. Fig. 6 is a schematic view (top view) of a microstructure layer having a columnar structure which is not parallel to each other. As shown in FIG. 6, the microstructure layer of the optical film of the present invention may comprise columnar structures (10) which are not parallel to each other, such as: intersecting non-parallel columnar structures 61, unintersected non-parallel columnar structures 62) and parallel to each other. Columnar structure 63.
圖7係本發明集光元件之一實施態樣之示意圖。如圖7所 :，本發明集光元件包含—基材m及位於基材一侧之第 一表面，豸第-表面具有複數個稜鏡柱狀結構702 ;及位 於基材另一側之第二蛊面夕冷 乐一衣面之塗層703,其中兩個集光元件 的接觸區域為704。 本發明之集光元件根據JIS K7136標準方法，測量全光 線透過率不低於嶋，較佳為高於嶋，更佳為9()%或_ 以上。根據一較佳具體實施例’本發明所製得之集光元件 ’其第-表面及第二表面皆有抗靜電處理，其表面阻抗皆 低於ίο13歐姆/米平方（Ω/α)，較佳為1〇8〜i〇l2歐姆 (Ω/口）。 々 本發明之集光元件具有至少丨.49的高折射率，較佳 ㈣❹於約i_5至1>6之間’可提供良好之光學增益值； 且因塗層中不含㈣’不會污染環境。本發明之集光元件 可使用於燈源裝置中，例如廣告燈箱、平面顯示器或LED :明設備等’尤其是可使用於液晶顯示器之背光模… 發明之集光元件可防止在運送或操作過程中被刮傷，也 134326.doc -21- 201018985 不易沾附灰塵，且透明度 处月度间，故本發明之集光 貼覆保護膜即可達到保今 用 心^成 作用，省卻黏、撕保護膜的製 ^使背光模組組裝時的便利性大為提高，亦可減 少成本。 以下實施例將針對本發明集光元件以及其製備方法提供 進一步之說明。 實施例 勝液A-F之製備 根據以下描述之方式製備膠液A-F，各配方之組成係如 表1所列。 首先’將各組份以表1所列之重量比例混合，再於50°C之 溫度下，以轉速l，000 rpin攪拌，形成一膠態可聚合組合物。 膠 A B c D E F a 50 0 0 50 0 10 b 0 50 50 0 13.7 0 c 30 30 10 0 0 0 d 14 14 0 44 0 0 e 0 0 34 0 0 8.8 f 5 5 5 5 1.2 1.2 g 1 1 1 1 1 0 — 0 h 0 0 0 0 0 15 i 0 0 0 0 13.4 0 j 0 0 0 0 3.5 0 k 0 0 0 0 68.2 64.2 1 0 0 0 0 0 0.8 134326.doc •22- 201018985 (a) :交聯劑（長興公司所生產，624-100®) (b) :交聯劑（長興公司所生產，6161_1〇〇®) (c) :單體（新中村公司所生產，a_LEni〇) (d) :稀釋劑（長興公司所生產，EM210®) • (e):稀釋劑（長興公司所生產，EM211®) . ⑴：光起始劑（Ciba公司所生產，1184) (g):滑劑（Tego公司所生產，Rad 2300) 參 （h):熱固性樹脂（長興公司所生產，7365_S_3〇) ⑴：熱固性樹脂（長興公司所生產，ETERFLON4267-P-50) (j) :硬化劑（長興公司所生產，N612) (k) :溶劑（乙酸乙酯，李長榮化學所生產） (l) :珠粒（積水化成公司所生產，ssx_1〇2) 實施例1 將膠態可聚合組合物膠液D塗佈於一聚苯二曱酸乙二酯 φ (PET)基材上（型號U34®，TORAY公司所生產），以形成一 平滑塗層，接著，於常溫下，以uv光能量射線照射該塗 . 層，使之固化。得到具有厚度為5微米之塗層之光學膜。 . 之後，於基材另一面，將膠態可聚合組合物膠液A塗佈於 上述基材上，以形成塗層，然後利用滚輪壓花方式於塗層 上形成一稜鏡柱狀花紋。同時以uv光能量射線照射該塗 層，使之固化》得到具有稜鏡高度為25微米之塗層之光學 膜。 實施例2 134326.doc •23- 201018985 將膠態可聚合組合物勝液D塗佈於一聚苯二曱酸乙_ t (PET)基材上（型號U34®，T0RAY公司所生產），以形成一曰 平滑塗層，然後利用表面具凹凸結構之滾輪以壓花方式於 塗層上形成一表面凹凸起伏結構。同時以uv光能量射線 ‘照射該塗層，使之固化。得到具有厚度為5微米之塗層之 . 光學膜。之後，於基材另一面，將膠態可聚合組合物膠液 A塗佈於上述基材上，以形成塗層，然後利用滚輪壓花方 ❹ 式於塗層上形成一稜鏡柱狀花紋。同時以UV光能量射線 照射該塗層，使之固化。得到具有稜鏡高度為25微米之塗 層之光學膜。 實施例3 將膠態可聚合組合物膠液D塗佈於一聚苯二甲酸乙二醋 (PET)基材上（型號U34®，T0RAY公司所生產），以形成一 平滑塗層，同時以UV光能量射線照射該塗層，使之固化 。得到具有厚度為5微米之塗層之光學臈。之後，於基材 ❿ 另一面，將膠態可聚合組合物膠液B塗佈於上述基材上， 以形成塗層，然後利用滾輪壓花方式於塗層上形成一稜鏡 • 柱狀花紋。同時以UV光能量射線照射該塗層，使之固化 。付到具有棱鏡尚度為25微米之塗層之光學膜。 實施例4 將膠態可聚合組合物膠液F塗佈於一聚苯二曱酸乙二酯 (PET)基材上（型號U34®，T0RAY公司所生產），以形成一 表面凹凸起伏塗層，接著，經10(rc乾燥丨分鐘後，再以 uv光能量射線照射該塗層，使之固化。得到具有厚度為5 134326.doc -24 - 201018985 微米之塗層之光學膜°之後’於基材另一面，將膠態可聚 合組合物膠液c塗佈於上述基材上，以形成塗層，然後利 用滾輪壓花方式於塗層上形成一稜鏡柱狀花紋。同時以 UV光能量射線照射該塗層’使之固化。得到具有稜鏡高 ， 度為25微米之塗層之光學膜。 * 實施例5 將膠態可聚合組合物膠液D塗佈於一聚苯二曱酸乙二醋 ❹ （PET)基材上（型號U34® ’ TORAY公司所生產），以形成一 表面凹凸起伏塗層，同時於常溫下，以uv光能量射線照 射該塗層，使之固化。得到具有厚度為5微米之塗層之光 學膜。之後，於基材另一面，將膠態可聚合組合物膠液c 塗佈於上述基材上，以形成塗層，然後利用滾輪壓花方式 於塗層上形成一稜鏡柱狀花紋。同時以uv光能量射線照 射該塗層，使之固化。得到具有稜鏡高度為25微米之塗層 之光學膜。 φ 實施例6 將膠態可聚合組合物膠液E塗佈於一聚苯二曱酸乙二酯 , (PET)基材上（型號U34®，T0RAY公司所生產），以形成一 • 平滑塗層，經100°c乾燥1分鐘後，再以uv光能量射線照 射該塗層，使之固化，得到具有厚度為5微米之塗層之光 學膜。之後，於基材另一面，將膠態可聚合組合物膠液A 塗佈於上述基材上，以形成塗層，然後利用滾輪壓花方式 於塗層上形成一稜鏡柱狀花紋。同時以uv光能量射線照 射該塗層，使之固化。得到具有棱鏡高度為乃微米之塗層 134326.doc -25- 201018985 之光學膜。 實施例7 將膠態可聚合組合物膠液D塗佈於一聚苯二甲酸乙二酯 (PET)基材上（型號U34®，TORAY公司所生產），以形成一 > 表面平滑塗層，同時於常溫下，以uv光能量射線照射該 •塗層’使之固化。得到具有厚度為5微米之塗層之光學膜 。之後，於基材另一面，將膠態可聚合組合物膠液A塗佈 φ 於上述基材上，以形成塗層，然後利用滚輪壓花方式於塗 層上形成一弧形柱狀花紋。同時以UV光能量射線照射該 塗層，使之固化。得到具有稜鏡高度為25微米頂部之曲率 半徑為3微米之塗層之光學膜。 比較例1 將膠態可聚合組合物膠液A塗佈於一聚苯二甲酸乙二酯 (PET)基材上（型號U34®，TORAY公司所生產），以形成塗 層，然後利用滾輪壓花方式於塗層上形成一稜鏡柱狀花紋 ❹ 。同時以UV光能量射線照射該塗層，使之固化。得到具 有棱鏡兩度為2 5微米之塗層之光學膜。 比較例2 將膠態可聚合組合物膠液F塗佈於一聚苯二曱酸乙二酯 (PET)基材上（型號U34®，TORAY公司所生產），以形成一 表面凹凸起伏塗層，經1 〇〇°C乾燥1分鐘後，再以uv光能 量射線照射該塗層，使之固化。得到具有厚度為5微米之 塗層之光學膜。之後，於基材另一面，將膠態可聚合組合 物膠液Λ塗佈於上述基材上’以形成塗層’然後利用滾輪 134326.doc • 26 - 201018985 壓花方式於塗層上形成一棱鏡柱狀花紋》同時以uv光能 量射線照射該塗層，使之固化。得到具有稜鏡高度為25微 米之塗層之光學膜。 測試方法： “ 錯筆硬度試驗：利用鉛筆硬度試驗機【Elc〇meter 3〇86, , SCRATCH BOY】，以 Mitsubishi錯筆用 Jis K_54〇〇方法測試 待測樣品之第一及第二表面之錯筆硬度，其中第一表面先 ❿ 以相同的膠液填平固化後再做測試，測試所得結果如下列 表2所示。 最大靜摩擦係數測試：利用摩擦係數試驗機【 TOYOSEIKI公司，系抱合力試驗機】以JIS Κ7125方法， 待測樣品大小63 mmX63 mm ’以試驗行程15〇 mm，試驗 速度100 mm/minute，荷重20N，量測待測樣品第一表面與 第二表面間的最大靜摩擦係數（μ3)，測試所得結果如下列 表2所示。 ❷ 耐刮試驗：利用線性耐磨試驗機[TABER 5750]於350公 克之重量平台（面積長寬20 mmx2〇 mm)上貼黏置待測樣品 ^ 膜片（長寬2〇 mmx20 _)’以其第一表面之聚光結構直接 ㈣試第二表面之重壓耐刮能力，以試驗行程〇·5 inch，1〇 cycle/min之速度進行10 cycleat刮測試，再觀察試驗後聚 光結構外觀以及第二表面是否有被刮傷，測試所得結果如 下列表2所示。 134326.doc -27- 201018985 表2 第一表面 塗層/第二 表面塗層 第一 表面 結構 第二 表面 結構 第一表 面錯筆 硬度 第二表 面鉛筆 硬度 最大靜 摩擦係 數（μβ) 財刮 試驗 實施例1 膠液Α/膠液D 稜鏡 柱狀 平滑 Η ΗΒ 0.46 無到傷 實施例2 膠液Α/膠液D 棱鏡 柱狀 凹凸 起伏 Η ΗΒ 0.41 無到傷 實施例3 膠液Β/膠液D 稜鏡 柱狀 平滑 Η ΗΒ 0.44 無刮傷 實施例4 膠液C/膠液F 稜鏡 柱狀 凹凸 起伏 ΗΒ Η 0.33 無刮傷 實施例5 膠液C/膠液D 棱鏡 柱狀 平滑 ΗΒ ΗΒ 0.31 無刮傷 實施例6 膠液Α/膠液Ε 稜鏡 柱狀 平滑 Η 2Β 0.31 無刮傷 實施例7 膠液Α/膠液D 弧形 柱狀 平滑 Η ΗΒ 0.37 無刮傷 比較例1 膠液Α/無 棱鏡 柱狀 平滑 Η ΗΒ 0.75 有到傷 比較例2 膠液Α/膠液F 棱鏡 柱狀 凹凸 起伏 Η Η 0.45 有刮傷 ® 1.由表2中實施例1,2,3,4,5,6及7之結果可知，本發明集 光元件之最大靜摩擦係數μβ皆小於0.7，且第一或第二表 - 面至少有一表面鉛筆硬度不大於ΗΒ時，聚光結構不會刮 - 傷；實施例1，2,3,6及7為第二表面鉛筆硬度不大於ΗΒ，實 施例4為第一表面鉛筆硬度不大於ΗΒ，實施例5為第一及 第二表面鉛筆硬度皆不大於ΗΒ，特別是，第二表面結構 可為平滑或是凹凸起伏（參閱表2中實施例1與實施例2)，或 是可改變第一表面之聚光結構之膠液組成（參閱表2中實施 134326.doc •28- 201018985 例1與實施例3)，或是聚光結構可為稜鏡柱狀或弧形柱狀 結構（參閱表2中實施例1與實施例7)，或是第一表面錯筆硬 度不大於HB的情況下第二表面塗層之膠液可加入珠粒（參 閱膠液F以及表2中之實施例4)。 2.由表2可知，實施例1，3,5,6,7及比較例1之第二表面結 J 構皆為平滑’且第二表面之鉛筆硬度不大於HB，因比較 例1最大靜摩擦係數（μ3)不小於〇·7，造成聚光結構有到傷 現象。 參 3·由表2可知’實施例2,4及比較例2之第二表面結構皆為 凹凸起伏，特別是，比較例1之最大靜摩擦係數（μ〇小於 〇.7，因聚光元件之第一及第二表面之鉛筆硬度皆大於 ΗΒ，造成聚光結構有刮傷現象。 以上實施例係用於對本發明作進一步說明，唯非用以限 制本發明之範圍。任何熟悉此項技藝之人士可輕易達成之 修飾及改變均包括於本案說明書揭示内容及所附申請專利 φ 範圍之範圍内。 【圖式簡單說明】 - 圖1為習知技術的集光元件簡單示意圖。 圖2為習知技術的包含保護膜之集光元件簡單示意圖。 圖3a與3b為習知技術的包含保護膜之集光元件簡單示意 圖。 、 圖4為本發明光學集光元件之一實施態樣之示意圖。 圖5為本發明光學集光元件之一實施態樣之示意圖。 圖6為本發明光學集光元件之-實施態樣之示意圖。 134326.doc •29- 201018985 圖7為本發明光學集光元件之一實施態樣之示意圖 【主要元件符號說明】 5 本體被破壞之聚光結構 8 保護膜 8a 擴散層 • 9 凹凸起伏結構 10 集光元件 11 基材 〇 12 及 41 聚光結構 13 及 14 保護膜 411 稜鏡柱狀結構 330及 Χι 單峰線性柱狀結構 340及 X2 單峰線性柱狀結構 61 已相交之不平行柱狀結構 62 未相交之不平行柱狀結構 ⑩ 63 平行之柱狀結構 701 基材 702 基材第一表面 703 基材第二表面 704 接觸區域 134326.doc -30-Figure 7 is a schematic illustration of one embodiment of the light collecting element of the present invention. As shown in FIG. 7, the light collecting element of the present invention comprises a substrate m and a first surface on one side of the substrate, the first surface has a plurality of columnar structures 702; and the other side of the substrate The coating 703 of the second face is cold, and the contact area of the two light collecting elements is 704. The light collecting element of the present invention measures the total light transmittance to not less than 嶋 according to the standard method of JIS K7136, preferably higher than 嶋, more preferably 9 ()% or more. According to a preferred embodiment, the light collecting element produced by the present invention has antistatic treatment on both the first surface and the second surface, and the surface impedance thereof is lower than ίο13 ohm/m square (Ω/α). Good for 1〇8~i〇l2 ohms (Ω/□). The light collecting member of the present invention has a high refractive index of at least 丨49, preferably (d) between about i_5 and 1>6, which provides a good optical gain value; and because the coating does not contain (iv) 'will not contaminate surroundings. The light collecting element of the present invention can be used in a light source device, such as an advertising light box, a flat panel display or an LED: a bright device, etc., in particular, a backlight module that can be used for a liquid crystal display... The light collecting element of the invention can be prevented from being transported or operated Was scratched, also 134326.doc -21- 201018985 is not easy to stain dust, and the transparency is between months, so the light-collecting protective film of the present invention can achieve the effect of protecting the present, eliminating the sticky and tearing protective film The system makes the convenience of assembling the backlight module greatly improved, and the cost can also be reduced. The following examples will provide further explanations for the light collecting elements of the present invention and methods for their preparation. EXAMPLES Preparation of Win Liquid A-F The glue A-F was prepared in the manner described below, and the composition of each formulation is as listed in Table 1. First, the components were mixed in the weight ratios listed in Table 1, and further stirred at a temperature of 50 ° C at a rotation speed of 1,000 rpin to form a colloidal polymerizable composition. Glue AB c DEF a 50 0 0 50 0 10 b 0 50 50 0 13.7 0 c 30 30 10 0 0 d 14 14 0 44 0 0 e 0 0 34 0 0 8.8 f 5 5 5 5 1.2 1.2 g 1 1 1 1 1 0 — 0 h 0 0 0 0 0 15 i 0 0 0 0 13.4 0 j 0 0 0 0 3.5 0 k 0 0 0 0 68.2 64.2 1 0 0 0 0 0 0.8 134326.doc •22- 201018985 (a) : Crosslinking agent (produced by Changxing Co., Ltd., 624-100®) (b): Crosslinking agent (produced by Changxing Co., Ltd., 6161_1〇〇®) (c): Monomer (produced by Shin-Nakamura Co., Ltd., a_LEni〇) ( d): thinner (produced by Changxing Company, EM210®) • (e): thinner (produced by Changxing Company, EM211®). (1): Photoinitiator (produced by Ciba, 1184) (g): slippery Agent (produced by Tego, Rad 2300) Reference (h): Thermosetting resin (produced by Changxing Co., Ltd., 7365_S_3〇) (1): Thermosetting resin (produced by Changxing Co., Ltd., ETERFLON 4267-P-50) (j): Hardener (Changxing Produced by the company, N612) (k): Solvent (ethyl acetate, produced by Lee Changrong Chemical Institute) (l): Beads (produced by Sekisui Chemicals Co., Ltd., ssx_1〇2) Example 1 Colloidal polymerizable composition adhesive Liquid D is coated on a polyethylene terephthalate φ On a (PET) substrate (Model U34®, manufactured by TORAY Corporation) to form a smooth coating, the coating was then irradiated with UV light at room temperature to cure it. An optical film having a coating having a thickness of 5 μm was obtained. Thereafter, on the other side of the substrate, a colloidal polymerizable composition glue A is applied onto the substrate to form a coating, and then a columnar pattern is formed on the coating by means of a roller embossing. At the same time, the coating was irradiated with uv light energy rays to cure it to obtain an optical film having a coating having a crucible height of 25 μm. Example 2 134326.doc •23- 201018985 The colloidal polymerizable composition Winer D was coated on a poly(phthalic acid) B-t (PET) substrate (Model U34®, manufactured by T0RAY) to A smooth coating is formed, and then a surface relief structure is formed on the coating by embossing using a roller having a concave-convex structure on the surface. At the same time, the coating is irradiated with uv light energy rays to solidify it. An optical film having a coating having a thickness of 5 μm was obtained. Thereafter, on the other side of the substrate, a colloidal polymerizable composition glue A is applied onto the substrate to form a coating, and then a roller-like embossing pattern is used to form a columnar pattern on the coating. . The coating is simultaneously irradiated with UV light energy rays to cure. An optical film having a coating having a crucible height of 25 μm was obtained. Example 3 A colloidal polymerizable composition glue D was coated on a polyethylene terephthalate (PET) substrate (Model U34®, manufactured by T0RAY) to form a smooth coating while The UV light energy ray illuminates the coating to cure it. An optical crucible having a coating having a thickness of 5 microns was obtained. Thereafter, on the other side of the substrate 将, a colloidal polymerizable composition glue B is applied onto the substrate to form a coating layer, and then a roll embossing method is used to form a ruthenium on the coating layer. . At the same time, the coating is irradiated with UV light energy rays to be cured. An optical film having a coating having a prism of 25 micrometers was applied. Example 4 A colloidal polymerizable composition glue F was applied to a polyethylene terephthalate (PET) substrate (Model U34®, manufactured by T0RAY Co., Ltd.) to form a surface relief coating. Then, after 10 minutes of rc drying, the coating is irradiated with uv light energy rays to cure it. After obtaining an optical film having a thickness of 5 134326.doc -24 - 201018985 micron, On the other side of the substrate, a colloidal polymerizable composition glue c is applied onto the substrate to form a coating layer, and then a roller-like embossing method is used to form a columnar pattern on the coating layer. The energy ray illuminates the coating to cure it. An optical film having a coating having a height of 25 microns is obtained. * Example 5 Coating a colloidal polymerizable composition glue D onto a polyphenylene hydride On a PET substrate (model U34® 'TORAY'), a surface relief coating was formed, and the coating was cured by UV light at room temperature. Obtaining an optical film having a coating having a thickness of 5 μm. Coating the colloidal polymerizable composition glue c onto the substrate to form a coating, and then forming a columnar pattern on the coating by means of roller embossing, and irradiating with uv light energy rays. The coating was allowed to cure to obtain an optical film having a coating having a height of 25 μm. φ Example 6 The colloidal polymerizable composition glue E was applied to a polyethylene terephthalate, (PET) substrate (model U34®, manufactured by T0RAY) to form a smooth coating. After drying at 100 ° C for 1 minute, the coating was irradiated with UV light rays to cure it. An optical film having a coating having a thickness of 5 μm. Thereafter, on the other side of the substrate, a colloidal polymerizable composition glue A is applied onto the substrate to form a coating, which is then embossed by a roller. A columnar pattern is formed on the coating layer, and the coating is irradiated with uv light energy rays to cure it. An optical film having a coating height of 135326.doc -25-201018985 having a prism height is obtained. Coating the colloidal polymerizable composition glue D onto poly(polyphthalic acid) On a diester (PET) substrate (model U34®, manufactured by TORAY) to form a smooth surface coating, and at the same temperature, the coating is cured by UV light rays at room temperature. An optical film having a coating having a thickness of 5 μm. Thereafter, on the other side of the substrate, a colloidal polymerizable composition glue A is applied onto the substrate to form a coating, and then embossing by means of a roller An arcuate columnar pattern was formed on the coating layer, and the coating layer was irradiated with UV light energy rays to be cured, and an optical film having a coating having a radius of curvature of 3 μm at a top of 25 μm was obtained. Example 1 A colloidal polymerizable composition glue A was applied to a polyethylene terephthalate (PET) substrate (Model U34®, manufactured by TORAY) to form a coating, which was then embossed with a roller. The method forms a columnar pattern on the coating. The coating is simultaneously irradiated with UV light energy rays to cure. An optical film having a coating having a prism of two degrees 25 microns was obtained. Comparative Example 2 A colloidal polymerizable composition glue F was applied to a polyethylene terephthalate (PET) substrate (Model U34®, manufactured by TORAY Corporation) to form a surface relief coating. After drying at 1 ° C for 1 minute, the coating was irradiated with uv light energy rays to cure. An optical film having a coating having a thickness of 5 μm was obtained. Thereafter, on the other side of the substrate, a colloidal polymerizable composition is applied to the substrate to form a coating, and then an embossing method is used to form a coating on the coating by a roller 134326.doc • 26 - 201018985 The prism column pattern simultaneously irradiates the coating with uv light energy rays to cure it. An optical film having a coating having a crucible height of 25 μm was obtained. Test method: “Wrong pen hardness test: using the pencil hardness tester [Elc〇meter 3〇86, , SCRATCH BOY], using the Jisubishi wrong pen to test the first and second surfaces of the sample to be tested with the Jis K_54〇〇 method The hardness of the pen, in which the first surface is first filled with the same glue and then tested, the test results are shown in the following Table 2. Maximum static friction coefficient test: using friction coefficient test machine [TOYOSEIKI company, system of cohesion testing machine 】 With the JIS Κ7125 method, the sample size to be tested is 63 mm×63 mm′ with a test stroke of 15 mm, a test speed of 100 mm/minute, and a load of 20 N. The maximum static friction coefficient between the first surface and the second surface of the sample to be tested is measured (μ3). The results of the test are shown in the following Table 2. 耐 Scratch resistance test: Paste the sample to be tested on a 350 gram weight platform (area length and width 20 mmx2 〇mm) using a linear abrasion tester [TABER 5750] The film (length and width 2〇mmx20 _)' with its first surface concentrating structure directly (four) test the second surface of the heavy pressure scratch resistance, with a test stroke 〇 · 5 inch, 1 〇 cycle / min speed 10 cy The cleat scratch test, and then observe the appearance of the concentrating structure after the test and whether the second surface is scratched. The test results are shown in the following Table 2. 134326.doc -27- 201018985 Table 2 First surface coating / second surface coating Layer first surface structure second surface structure first surface stagger hardness second surface pencil hardness maximum static friction coefficient (μβ) Scratch test example 1 glue Α/glue D 稜鏡 columnar smooth Η ΗΒ 0.46 no damage Example 2 Glue 胶/胶液 D Prism columnar undulation Η ΗΒ 0.41 No damage Example 3 Glue Β/Glue D 稜鏡 Columnar smooth Η 4 0.44 No scratching Example 4 Glue C/Glue Liquid F 稜鏡 columnar undulation ΗΒ Η 0.33 No scratches Example 5 Glue C / Glue D Prism columnar smooth ΗΒ 1 0.31 No scratches Example 6 Glue 胶 / glue Ε 稜鏡 columnar smooth Η 2Β0.31 No scratches Example 7 Glue Α/Glue D Curved columnar smooth Η ΗΒ 0.37 No scratches Comparative example 1 Glue Α/Non-prism columnar smooth Η 5 0.75 Having a wound Comparative Example 2 Glue Α / glue F prism columnar undulation Η 0.45 Scratch® 1. It can be seen from the results of Examples 1, 2, 3, 4, 5, 6 and 7 in Table 2 that the maximum static friction coefficient μβ of the light collecting element of the present invention is less than 0.7, and the first or the first The second surface - the surface has at least one surface pencil hardness not greater than ΗΒ, the concentrating structure does not scratch-injury; the examples 1, 2, 3, 6 and 7 are the second surface pencil hardness is not greater than ΗΒ, the embodiment 4 is the first The hardness of the surface pencil is not more than ΗΒ. In the fifth embodiment, the pencil hardness of the first surface and the second surface is not more than ΗΒ. In particular, the second surface structure may be smooth or undulating (refer to Embodiment 1 and Embodiment 2 in Table 2). ), or the composition of the glue that can change the concentrating structure of the first surface (see Table 2 for implementation 134326.doc • 28-201018985 Example 1 and Example 3), or the concentrating structure can be columnar or The arc-shaped columnar structure (refer to Example 1 and Example 7 in Table 2), or the first surface misaligned pen hardness is not greater than HB, the second surface coating glue can be added to the beads (see glue F) And Example 4) in Table 2. 2. It can be seen from Table 2 that the second surface junctions of Examples 1, 3, 5, 6, and 7 and Comparative Example 1 are smooth 'and the pencil hardness of the second surface is not greater than HB, because the maximum static friction of Comparative Example 1 The coefficient (μ3) is not less than 〇·7, causing damage to the concentrating structure. As can be seen from Table 2, the second surface structures of Examples 2, 4 and Comparative Example 2 are irregularities, in particular, the maximum static friction coefficient of Comparative Example 1 (μ〇 is less than 〇.7, due to the concentrating element) The pencil hardness of the first and second surfaces is greater than ΗΒ, causing scratches on the concentrating structure. The above embodiments are intended to further illustrate the present invention, but are not intended to limit the scope of the present invention. Modifications and changes that can be easily made by a person are included in the scope of the disclosure of the present specification and the scope of the attached patent φ. [Simplified Schematic] - Figure 1 is a simplified schematic diagram of a conventional light collecting element. BRIEF DESCRIPTION OF THE DRAWINGS Figures 3a and 3b are simplified schematic views of a light collecting element comprising a protective film according to the prior art. Fig. 4 is a schematic view showing an embodiment of an optical light collecting element of the present invention. Fig. 5 is a schematic view showing an embodiment of an optical light collecting element of the present invention. Fig. 6 is a schematic view showing an embodiment of an optical light collecting element of the present invention. 134326.doc • 29- 201018985 Fig. 7 is a light of the present invention Schematic diagram of one embodiment of the light collecting element [Description of main components] 5 concentrating structure of the body being destroyed 8 Protective film 8a Diffusion layer • 9 undulating structure 10 Light collecting element 11 Substrate 〇 12 and 41 concentrating structure 13 and 14 protective film 411 稜鏡 columnar structure 330 and Χι unimodal linear columnar structure 340 and X2 unimodal linear columnar structure 61 intersected non-parallel columnar structure 62 non-intersecting non-parallel columnar structure 10 63 parallel Columnar structure 701 substrate 702 substrate first surface 703 substrate second surface 704 contact area 134326.doc -30-