201242752 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種微結構光學板的製造方法及其成 型裝置，特別是例如擴散板、導光板，或其它具有不同光 學效果的光學板，並且是具有高轉寫率的微結構光學板的 製造方法及其成型裝置。 【先前技術】 參閱圖1，在特開2001-113538之日本公開專利案中， 揭示一種在光學膜上成型微結構之技術，其是將一繞曲成 捲筒狀之光學膜基材1引取拉出，並在該基材1表面塗佈 一層紫外光硬化樹脂10,接續通過一表面具微結構圖案之 轉寫滾輪11壓印時同時用-光照設備12照光，並加上後續 之壓延膜貼步驟(圖未示)而形成一表面具突出微結構13之 多層光學膜。 其中，在轉寫滾輪11壓印並輸㈣光學職材丨的過 程中’必需讓已塗佈其上之紫外光硬化樹脂1G有一段光照 模製成型期。因此乃是利用該基# 1與其上之紫外光硬化 樹脂H)被f折輸送進入該轉寫滾輪u時，會弧覆貼 在該轉寫滾輪11的下半部輪面上，同時湘該紫外光硬化 樹月曰10 U該轉寫滚輪u表面微結構凹穴的模製階段進 行光照硬化的步驟’使該紫外光硬化樹脂Π)有充分的時間 硬化成型為微結構13。所述光學膜由於厚度極薄（小於03 爱）其撓曲性及成型性較佳，製備過程中即可充分地彎 r覆貼在滾輪輪面上’因此在製作表面上的微結構時較為 201242752 簡易。 然而在一般液晶顯示器（Liquid Crystal Display)的背光 模組（Back light module)中的光學板，例如光擴散板、導光 板’如果要在其表面形成微結構，由於已成型的光學板材 無法直接彎折以弧曲的型態充分覆貼於滾輪輪面上，因此 ’實際轉寫於光學板材表面的微結構形狀與預定形狀不同 而影響光學性質，此即轉寫率不足，故前述特開200^ 113538所公開之製造光學膜表面微結構的技術，不適用於 製作具有表面微結構的光學板。 【發明内容】 因此，本發明之目的，即在提供一種適用於製作具有 高轉寫率之表面微結構的光學板的製造方法，藉由適當調 控一模頭押出之熔融態樹脂原料接觸至一轉寫滾輪時的溫 度而可讓該炫融態樹脂原料維持較佳的高溫可撓曲性以 彎折覆貼於該轉寫滾輪之輪面上，並且搭配一高流動性的 光敏樹脂材料容易填滿該轉寫滾輪的轉寫微結構中的特性 ，提升轉寫率而可獲得本發明之微結構轉寫率高之微結構 光學板的製造方法。 於是，本發明一種具有高轉寫率的微結構光學板的製 造方法，配合一成型裝置來製造一微結構光學板，所述成 型裂置包含：-可押出㈣的樹脂原料的模頭、二個間隔 的壓製滾輪、一個位於所述壓製滾輪下游處的轉寫滾輪， 以及-光照設備，該轉寫滾輪之輪面上具有數個轉寫微結 構，相鄰的轉寫微結構之間共同界定一成型空間。誃具有 201242752 高轉寫率的微結構光學板的製造方法，包含： —押出步驟：將該模頭内的樹脂原料押出並通過所述 兩壓製滾輪之間，被壓製滾輪滚壓後的樹脂原料的表面平 坦’並與該轉寫滾輪接觸而弧·覆於該轉寫滾輪之輪面上並 受該轉寫滾輪滾壓帶動，其中，該樹脂原料與轉寫滾輪接 觸時的溫度控制在該樹脂原料之Tg°C〜Tg+l〇〇〇C(Tg表示 玻璃轉移溫度）範圍内； 一充填步驟：使一可受光照而硬化的光敏樹脂材料注 入所述成型空間，並使成型空間受該弧覆於該轉寫滾輪輪 面的樹脂原料所覆蓋；及 一光照成型步驟：使該光照設備發出的光線朝該轉寫 滚輪照射，並使充填於成型空間内的光敏樹脂材料受到光 照而硬化成型。 較佳地，本發明所述微結構光學板的成型裝置，還包 含一個位於該轉寫滾輪之-側的反射鏡。而該光照設備位 於該反射鏡的一側並與該轉寫滾輪的位置錯開，該光照設 備發出的光線可以被該反射鏡反射而朝該轉寫滾輪照射。 因此在本發明製造方法中的光照成型步驟，較佳地是由該 反射鏡將光照設備的光線反射而照射該轉寫滾輪。本發明 使該光照設備與轉寫滾輪的位置錯開，可以避免轉寫滾輪 上的光敏樹脂材料向下滴落而污染光照設備。 本發明的押出步驟係以押出機等設備將樹脂原料押出 ’並且經該模頭押成溶融狀樹脂原料，較佳料溫為170t 5 201242752 上述押出的樹脂原料是具有光學性質且可做為光學板 的樹脂，其種類並無限制，具體例為（甲基）丙烯酸系樹酯 、聚碳酸酯樹脂（PC樹脂）' 苯乙烯樹脂（PS樹脂）、甲基丙 烯酸甲酯-苯乙烯共聚合物（MS樹脂）、丙烯腈_苯乙烯共聚 合物（AS樹脂）、環狀烯烴聚合物（c〇c樹脂）、聚對苯二甲 酸乙二酯（PETG樹脂）等。 上述所謂的（甲基）丙烯酸酯系樹脂，表示丙烯酸酯 系樹脂及/或曱基丙烯酸酯系樹脂，是由（甲基）丙烯酸酯 系單體所形成的聚合物，例如聚甲基丙烯酸甲酯（ polymethyl methacerylate ,簡稱 PMMA)，上述（甲基）丙 烯酸酯系單體，是表示丙烯酸酯系單體及/或甲基丙烯酸酯 系單體，包括甲基丙烯酸甲酯、甲基丙烯酸乙酯、曱基丙 烯酸異丙酯、正-丙烯酸丁酯，丙烯酸甲酯、丙稀酸乙酯、 丙烯酸異丙酯等單體，其中以甲基丙烯酸甲酯單體及丙烯 酸甲酯單體為佳。 上述樹脂原料中可添加各種添加劑例如：光擴散劑、 螢光劑、紫外線吸收劑、抗氧化劑等。上述光擴散劑具體 例為無機微粒子及有機微粒子；無機微粒子例如：硫酸鋇 (BaS〇4)、二氧化鈦（Ti〇2)等微粒子；而有機微粒子例如： 聚苯乙稀樹脂、（曱基）丙烯酸系樹脂、有機石夕氧烧樹脂微粒 子等。 本發明該模頭内的熔融態樹脂原料的押出速度視所需 光學板的厚度來決定，樹脂原料押出後與轉寫滾輪接觸， 其中，樹脂原料與轉寫滾輪接觸時的溫度控制在樹脂原料 201242752 之Tgc ~Tg + 100°c (Tg表示玻璃轉移溫度）範圍内，較佳在 Tg C ~Tg+ 80 c範圍内，更佳在Tg°C ~Tg+ 60°c範圍内；如 此可讓樹脂原料維持較佳的高溫可撓曲性以彎折覆貼於該 轉寫滾輪之輪面上。 本發明之樹脂原料與轉寫滾輪接觸時的溫度控制方法 ，較佳係使模頭内之該樹脂原料押出後，經冷卻後再與該 轉寫滾輪接觸，使接觸時的溫度控制在該樹脂原料之Tg»c 〜Tg+ioo°c範圍内。當與轉寫滾輪接觸的樹脂原料溫度太 咼時，將使樹脂原料流動性大，過度軟化；當溫度太低使 樹脂原料提早變硬，兩者均不利於微結構的成型。上述冷 卻過程可在一般空氣中或冷卻空氣中或以冷風吹等環境下 實施。本發明之樹脂原料與轉寫滾輪接觸時的溫度係指樹 脂原料的平均溫度，平均溫度由接觸到轉寫滾輪時的樹脂 原料的中央處，及其樹脂原料兩側往内各距離四分之一處 ，共三點的平均值，其測定方式不限制，可使用紅外線感 溫器、光學感溫器、輻射感溫器或比色感溫器等儀器量測 0 本發明的轉寫滾輪具有數個轉寫微結構，在相鄰的轉 寫微結構之間共同界定前述成型空間，此成型空間即為所 欲成型的光學板的微結構形狀，上述成型空間係指相鄰兩 個轉寫微結構最高點兩者相連而成的空間，上述微結構形 狀不限制，可為三角形鏡（Prism iens)、半圓形鏡（lenticular lens)等形狀。 本發明被押出的樹脂原料在接觸轉寫滾輪時，因為樹 201242752 月曰原料尚未完全冷卻定型，故可以順著轉寫滾輪之形狀弧 覆於轉寫滾輪之輪面上並受轉寫滾輪所滾壓帶動。 本發明的押出步驟同時還具有整平效果，透過壓製滾 輪滾壓使樹脂原料表面平整，因此在後續的充填步驟中， 光敏樹脂材料可以均勻塗布在樹脂原料表面，有利於成型 出的微結構均勻性與一致性，並提高結構轉寫率。 本發明的樹脂原料經轉寫滾輪壓印時，受限於樹脂原 料本身的特性，例如黏性、流動性，加上樹脂原料呈現熔 融態的時間若太短就會提早冷卻定型，但時間若太長又不 適且壓製定型。因此，為了獲得高轉寫率之微結構，所述 轉寫滾輪的轉速較佳為^20公尺/分鐘，更佳為2〜1〇公尺/ 分鐘，最佳為3〜5公尺/分鐘之速度押出。 本發明可在與該轉寫滾輪相鄰的上游處配置有至少一 壓製滾輪’壓製滾輪係作為壓製光學板使轉寫滾輪順利轉 寫微結構於光學板上，轉寫滾輪與壓製滾輪之間的距離不 限制，可視光學板的厚度而調整。料，該轉寫滾輪的溫 度較佳為30C~100°C，而壓製滾輪溫度較佳為7〇〇c〜12(rc 除此之外還可配置至少—支鏡面滾輪位於該轉寫滾輪的 下游位f ’所述鏡面滾輪的結構形態與前述壓製滾輪相同 ’表面平坦而不具有任何微結構，該鏡面滾輪與轉寫滾輪 配合滾壓光學板，使微結構順利轉寫，其溫度為5〇它~1〇〇 °C。另外還可配置至少一支輸送滾輪及至少一支引取滾輪 來帶動光學板的移冑。上述滾輪的的材質不料4，可為金 屬、橡膠等材質》 ^ 201242752 前述樹脂原料經過轉寫與壓製滾輪時仍需在高溫的狀 態下並具備可撓曲性，才能以彎折弧曲的形態通過。因此 ’該等滚輪溫度如果太低，將使樹脂原料冷卻而容易於輸 送過程中產生裂縫，而滾輪溫度若太高，樹脂原料流動性 太高亦不利於微結構的成型。 本發明之光學板可包括光擴散板、導光板等，光學板 的厚度並不限制，較佳為〇」〜J 〇公釐（mm)。光學板的厚度 係指微結構最高點至光學板另一不具微結構面的垂直距離 。上述光學板的厚度可由該模頭内樹脂原料押出速度大小 、轉寫滾輪與壓製滾輪之間的距離及轉寫滾輪的轉速快慢 等方式來控制。 本發明之充填步驟中，由於所述光敏樹脂材料具有受 特定光源照射而硬化的特性，其流動性高的特性可充分注 入轉寫滾輪的成型空間内’ i且經光照射後硬化形成較接 近預定形狀的微結構。所述成型空間受該弧覆於轉寫滾輪 輪面的樹脂原料所覆蓋，係首先將上述可受光照而硬化的 光敏樹脂材料注人該成型空間内並順著轉寫滾輪的轉動而 移動；另外’上述押出的樹脂原料經轉寫滾輪後弧覆於其 輪面上’並經該轉寫滾輪帶動該樹㈣料㈣，將先前注 入在該成型空間的光敏樹脂材料封閉覆蓋。 再者，所述光敏樹脂材料注入成型空間的注入方式不 限制’可使用喷塗（Spray)、擠出（Extrude)等方式，光敏樹 脂材料注入速度宜適當調整，使其能均勾地注入該成型空 間。光敏樹脂材料注入的速度如果太快，將無法均勾地流 201242752 動於整個成型空間内；如果注入速度太慢，光敏樹脂材料 就無法配合整個製程速度而確實充填該成型空間。光敏樹 脂材料注入速度較佳地為50立方公分/分鐘.公尺~1200立 方公分/分鐘.公尺（單位時間及單位寬幅的注入量），上述 寬幅係指押出後的樹脂原料的寬度。 本發明的光敏樹脂材料必需兼具流動性佳及受光照射 易於硬化之特性，所述光敏樹脂材料也就是能夠受到光照 射而進行光交聯（Cross-linking)反應並硬化的材料，具體例 如：可以受到紫外光（UV光）照射而硬化的紫外光硬化膠、 可以受到紅外光（IR)照射而硬化的紅外光硬化膠，或是可以 受到鹵素光照射而硬化的鹵素光硬化膠。 在本發明實施例中，光敏樹脂材料是使用紫外光硬化 膠，其組成並不限定，其具體例包含：（a)壓克力系樹脂 (Acrylic resin)，其使用量為40重量％〜50重量％ ; (b)自由 基光起始劑（Free radical photo-initiator)，其使用量為5重 量％~15重量％，自由基光起始劑的具體例為Trimethyl Benzoyl Phosphine Oxide (ΤΡΟ) 、 2-Methyl-l-[4-(Methylthio)phenyl]-2-Morpholino Propan-l-one (Ciba Irgacure 907) 、Isothioxanthone (ITX) ’ 或此等之一組合； (c)反應性壓克力交聯樹脂（Reactive acrylic cross-linking resin)，其使用量為40重量％ ~50重量％，反應性壓克力交 聯樹脂的具體例為〇1-丁1^1116【11丫1〇1卩1'0卩&116丁61^3(^5^16(8尺-355) ' Dipentaerythritol Monohydroxy Pentaacrylate (SR-399) ' Ethoxylated Bisphenol A Diacrylate (SR-349)，或此等之一組 10 201242752 合。 在一般的場合，例如微結構為三角形鏡，具有集光作 用時，本發明的光敏樹脂材料，其折射率與樹脂原料折射 率的差異以不大於G.G5為較佳，更佳為不大^㈣3,最佳 為不大於0.01。在其他場合，例如微結構的目的是在分散 光線時，光敏樹脂材料的折射率與樹脂原料折射率可有較 大的差異。 本發明的光照成型步驟使該光敏樹脂材料受該光照設 備的光照射而硬化成型；上述使用的光照設備係指能提供 包括紫外光（UV)、紅外光（IR)或自素光等設備，其光線必需 配合所使用的光敏樹脂材料，因此當該光敏樹脂材料為紫 外光硬化膠時，該光照設備發出紫外光；當該光敏樹脂材 料為紅外光（或鹵素光）硬化膠，該光照設備發出紅外光（或 鹵素光）。所述光照設備的光功率為100瓦/公分（ W/cm)~1000 瓦/公分。 另外，該光照没備後方亦可置一曲面反光罩，使該光 照叹備射出的光源更均勻。而該反射鏡的設計並不限制， 只要能將光照設備的光線均勻反射至該光敏樹脂材料，並 利用該光照設備的光照射而使該光敏樹脂材料硬化成型即 可，該反射鏡可為三角形結構、圓形結構、前低後高並且 兩側邊為傾斜0~30度之梯形結構，其中較佳為前低後高並 且兩側邊為傾斜〇~30度之梯形結構，可將燈管邊緣發出的 光往外延伸照射面積，使光線的收光面範圍較大且較均勻 11 201242752 本發明微結構光學板的轉寫率測定係取光學板具微結 構的一面寬約1公分的長條形樣品，置於光學顯微鏡下量 測光學板的微結構高度與轉寫滾輪的成型空間的高度比值 ，該轉寫率較佳在95%以上，更佳在97%以上，最佳在 99%以上。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 參閱圖2、3、4,本發明具有高轉寫率的微結構光學板 的製造方法之較佳實施例，是藉由一成型裝置3來製造一 個具有數個微結構212的微結構光學板2，本實施例的微結 構光學板2為一種光擴散板但不限於此，所述成型裝置3 包含：一個容裝一樹脂原料5的模頭31、一滾輪單元32、 一光敏樹脂材料填充瓶33、一光照設備34，以及一反射鏡 35。在此定義一個由上游指向下游的生產線進行方向4，在 本實施例中，左側為上游處，右側為下游處。 其中’該滾輪單元32包括二個位於該模頭31的下游 處且上下間隔的壓製滾輪322、322，、一個間隔地位於壓製 滾輪322、322,下游處的轉寫滾輪321、一個位於轉寫滾輪 321下游處的鏡面滾輪324，以及數個依序沿著生產線進行 方向4排列在鏡面滾輪324的下游處的輸送滾輪323。 該轉寫滾輪321之輪面上具有數個突出的轉寫微結構 326 ’相鄰二個轉寫微結構326之間都共同界定一成型空間 5 12 201242752 30。所述壓製滾輪322、322’及鏡面滾輪324為相同形態的 滾輪，其表面皆平坦、不具有任何微結構。 所述光敏樹脂材料填充瓶33設置在該轉寫滾輪321的 上方，其内部容裝一光敏樹脂材料6，本實施例所使用的材 料是可受到紫外光（UV光）照射而硬化的紫外光硬化膠。 該反射鏡35设置在該轉寫滾輪321的一側，具體而言 ，是設置在轉寫滾輪321下方，並鄰近該樹脂原料5弧覆 於轉寫滾輪321之輪面處，該反射鏡35之具體結構如圖3 所示’其一鄰近該光照設備34的表面351約呈梯形，其一 反光面3 5 2為刖低後南並且包括兩個位於側邊且傾斜角度 為0~30度之側反光面部353。所述反光面352前低後高是 指鄰近該光照設備34的一側較低，遠離該光照設備34的 一側較高。側反光面部353將光照射備34之燈管邊緣發出 的光反射如光線A所示，藉此形成較為往外延伸照射的光 照範圍。 該光照設備34位於該反射鏡35之一侧，用於提供紫 外光照射，並包括數個能發出紫外光的紫外光燈341，以及 個位於所述兔外光燈341的後方且弧曲的反光罩342，用 於使紫外光燈341射出的光源更均勻。 參閱圖2、4、5,本發明具有高轉寫率的微結構光學板 的製造方法，包含以下步驟： ()押出步驟71 ·將該模頭31内之樹脂原料5由模頭 - 開口押出，並且是以熔融態的板狀型態被押出， 此時，、料伽約$ 24〇c，其押出的速度約為珊公斤/小時 13 201242752 。本實施例之樹脂原料5為苯乙烯樹脂，其玻璃轉移溫度 (Tg)約為 105°C。 使被押出的樹脂原料5先在空氣中冷卻後，再通過所 述兩壓製滾輪322、322’之間，由於壓製滾輪322、322,具 有平坦表面’因此被壓製滾輪322、322’滾壓後的樹脂原料 5的表面平坦均勻。接著樹脂原料5於一接觸位置8接觸到 轉寫滾輪321後，會弧覆於該轉寫滾輪321之下方的輪面 上並受該轉寫滾輪321滾壓帶動朝生產線進行方向4移動 本實施例之上方壓製滾輪322的溫度為8〇t，並朝逆 時鐘方向轉動，下方壓製滾輪322’的溫度為8(rC，並朝順 時鐘方向轉動’該轉寫滾輪321的溫度為7〇t，並以4公 尺/分鐘的轉速朝逆時鐘方向轉動，而位於該轉寫滾輪321 之下游處的鏡面滾輪324的溫度為6〇。〇。 該樹脂原料5向下抵達、並接觸到轉寫滾輪321時的 平均溫度A 120 t。本實施例中，平均溫度的定義是由接 觸到轉寫滾輪321時的樹脂原料5的中央處，及該樹脂原 料5兩側往内各距離四分之一處，共三點的溫度值，以紅 外線感溫器測量後取其平均值而得。 ⑺充填步驟72 :該樹脂原料5被該模頭3ι押出及被注 入該下方壓製滾輪322,與轉寫料321間的同時，使該光 敏樹脂材料填充瓶33内的光敏樹脂材料6向下喷塗而流注 於該轉寫滾輪321相鄰的轉寫微結構如之間的成型空間 30’並使該成型空間3〇受該弧覆於轉寫滾輪321輪面的樹201242752 6. The invention relates to a method for manufacturing a microstructured optical plate and a molding device thereof, in particular, for example, a diffusion plate, a light guide plate, or other optical plates having different optical effects. Moreover, it is a method of manufacturing a microstructured optical plate having a high transfer rate and a molding apparatus therefor. [Prior Art] Referring to Fig. 1, in the Japanese Laid-Open Patent Publication No. 2001-113538, a technique for forming a microstructure on an optical film is disclosed, which is to take an optical film substrate 1 which is wound into a roll shape. Pulling out, and coating a surface of the substrate 1 with a layer of ultraviolet curing resin 10, followed by embossing through a surface of the transfer pattern roller 11 having a microstructure pattern, and simultaneously illuminating with the illumination device 12, and adding a subsequent calendered film A layering step (not shown) forms a multilayer optical film having a protruding microstructure 13 on its surface. Among them, in the process of embossing the transfer roller 11 and transferring (4) the optical member 丨, it is necessary to have the ultraviolet curing resin 1G coated thereon have a light molding period. Therefore, when the base #1 and the ultraviolet curing resin H) thereon are fed into the transfer roller u by f, the arc is applied to the lower half of the transfer roller 11, and The step of performing light hardening in the molding stage of the transfer surface of the micro-structured recess of the surface of the transfer roller u-cursing the surface of the micro-structured recess of the surface of the U-light-cured tree is sufficiently hardened to form the microstructure 13. The optical film is excellent in flexibility and formability because of its extremely thin thickness (less than 03 love), and can be sufficiently bent and applied to the wheel surface of the roller during the preparation process, so that when the microstructure on the surface is produced, 201242752 Easy. However, in an ordinary liquid crystal display (Back light module), an optical plate such as a light diffusing plate or a light guide plate may have a microstructure on its surface, since the formed optical plate cannot be directly bent. The shape of the curved curve is fully applied to the wheel surface of the roller, so that the shape of the microstructure actually transferred to the surface of the optical plate is different from the predetermined shape and affects the optical property, and thus the transfer rate is insufficient, so the above-mentioned special opening 200 ^ 113538 discloses a technique for fabricating the surface microstructure of an optical film that is not suitable for fabricating an optical plate having a surface microstructure. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method for fabricating an optical sheet suitable for use in fabricating a surface microstructure having a high transfer rate by appropriately regulating the contact of a molten resin material extruded from a die to a The temperature at which the roller is transferred can maintain the high-temperature flexibility of the dazzling resin material to be bent and applied to the wheel surface of the transfer roller, and is easily matched with a high-flow photosensitive resin material. The method of manufacturing the microstructured optical plate having the high microstructure transfer rate of the present invention can be obtained by filling up the characteristics in the transfer microstructure of the transfer roller and increasing the transfer rate. Thus, the present invention provides a method for fabricating a microstructured optical plate having a high transfer rate, and a molding device for fabricating a microstructured optical plate comprising: - a die for extruding (four) resin material, a spaced pressing roller, a transfer roller located downstream of the pressing roller, and a lighting device having a plurality of transfer microstructures on the wheel surface of the transfer roller, and adjacent transfer microstructures are common Define a molding space.制造 A method for manufacturing a microstructured optical plate having a high transfer rate of 201242752, comprising: - an extruding step: extruding a resin material in the die and passing between the two pressing rollers, and a resin material rolled by the pressing roller The surface is flat and is in contact with the transfer roller and arced over the wheel surface of the transfer roller and is driven by the transfer roller. The temperature of the resin material in contact with the transfer roller is controlled by the The resin material has a Tg ° C ~ Tg + l 〇〇〇 C (Tg represents glass transition temperature); a filling step: injecting a light-hardenable photosensitive resin material into the molding space, and subjecting the molding space to The arc is covered by the resin material covering the wheel surface of the transfer roller; and an illumination forming step: irradiating the light emitted by the illumination device toward the transfer roller, and illuminating the photosensitive resin material filled in the molding space Hardened molding. Preferably, the molding apparatus for the microstructured optical plate of the present invention further comprises a mirror located on the side of the transfer roller. The illumination device is located on one side of the mirror and is offset from the position of the transfer roller, and the light emitted by the illumination device can be reflected by the mirror to be illuminated toward the transfer roller. Therefore, in the illumination forming step in the manufacturing method of the present invention, it is preferred that the mirror reflects the light of the illumination device to illuminate the transfer roller. The present invention shifts the position of the illumination device and the transfer roller, thereby preventing the photosensitive resin material on the transfer roller from dripping downward and contaminating the illumination device. The extruding step of the present invention is to extrude the resin material by means of an extruder or the like and to form a molten resin material through the die, preferably at a material temperature of 170t 5 201242752. The above-mentioned resin raw material is optical and can be used as an optical material. The resin of the plate is not limited in its kind, and specific examples thereof are (meth)acrylic resin, polycarbonate resin (PC resin), styrene resin (PS resin), methyl methacrylate-styrene copolymer. (MS resin), acrylonitrile-styrene copolymer (AS resin), cyclic olefin polymer (c〇c resin), polyethylene terephthalate (PETG resin), and the like. The above-mentioned (meth) acrylate-based resin means an acrylate-based resin and/or a methacrylate-based resin, and is a polymer formed of a (meth) acrylate-based monomer, for example, polymethyl methacrylate. Polymethyl methacerylate (PMMA), the above (meth) acrylate monomer, means acrylate monomer and / or methacrylate monomer, including methyl methacrylate, ethyl methacrylate A monomer such as isopropyl methacrylate, n-butyl acrylate, methyl acrylate, ethyl acrylate or isopropyl acrylate, wherein methyl methacrylate monomer and methyl acrylate monomer are preferred. Various additives such as a light diffusing agent, a fluorescent agent, an ultraviolet absorber, an antioxidant, and the like may be added to the above resin raw material. Specific examples of the light diffusing agent include inorganic fine particles and organic fine particles; inorganic fine particles such as fine particles such as barium sulfate (BaS〇4) and titanium dioxide (Ti〇2); and organic fine particles such as polystyrene resin and (fluorenyl)acrylic acid. Resin, organic stone oxide resin fine particles, and the like. The extrusion speed of the molten resin raw material in the die of the present invention is determined according to the thickness of the required optical plate, and the resin raw material is pushed out and contacted with the transfer roller, wherein the temperature of the resin raw material in contact with the transfer roller is controlled in the resin raw material. 201242752 Tgc ~ Tg + 100 °c (Tg represents glass transition temperature), preferably in the range of Tg C ~ Tg + 80 c, more preferably in the range of Tg ° C ~ Tg + 60 ° c; Maintaining a good high temperature flexibility is applied to the wheel surface of the transfer roller by bending. The method for controlling the temperature of the resin material of the present invention in contact with the transfer roller is preferably such that after the resin material in the die is extruded, it is cooled and then brought into contact with the transfer roller, so that the temperature at the time of contact is controlled in the resin. The raw material has a range of Tg»c~Tg+ioo°c. When the temperature of the resin raw material in contact with the transfer roller is too high, the resin raw material is made to be fluid and excessively softened; when the temperature is too low, the resin raw material is hardened early, and both are disadvantageous for the formation of the microstructure. The above cooling process can be carried out in general air or in cooling air or in a cold air blowing environment. The temperature at which the resin raw material of the present invention is in contact with the transfer roller refers to the average temperature of the resin raw material, and the average temperature is from the center of the resin raw material when the transfer roller is contacted, and the distance between the two sides of the resin material is four quarters. One place, the average value of three points, the measurement method is not limited, and can be measured by an instrument such as an infrared temperature sensor, an optical temperature sensor, a radiation temperature sensor or a colorimetric temperature sensor. The transfer roller of the present invention has a plurality of transfer microstructures, which define the aforementioned molding space together between adjacent transfer microstructures, which is the microstructure shape of the optical plate to be formed, and the molding space refers to two adjacent transfer The space in which the highest point of the microstructure is connected, the shape of the microstructure is not limited, and may be a shape of a prism, a lenticular lens or the like. When the resin raw material of the invention is contacted with the transfer roller, since the raw material of the tree 201242752 is not completely cooled and shaped, the shape of the transfer roller can be arc-covered on the surface of the transfer roller and is transferred by the transfer roller. Rolling. The extruding step of the present invention also has a leveling effect, and the surface of the resin raw material is flattened by rolling the pressing roller. Therefore, in the subsequent filling step, the photosensitive resin material can be uniformly coated on the surface of the resin raw material, which is favorable for forming the microstructure uniform. Sex and consistency, and improve the structure transfer rate. When the resin raw material of the present invention is embossed by the transfer roller, it is limited by the characteristics of the resin raw material itself, such as viscosity, fluidity, and if the time when the resin material is in a molten state is too short, it will be cooled and set early, but if time is Too long and uncomfortable and pressure type. Therefore, in order to obtain a microstructure with a high transfer rate, the rotation speed of the transfer roller is preferably ^20 m/min, more preferably 2 to 1 m/min, and most preferably 3 to 5 m/ The speed of minutes is pushed out. In the present invention, at least one pressing roller 'pressing roller system is disposed upstream of the transfer roller as a pressing optical plate, so that the transfer roller can be smoothly transferred to the micro-structure on the optical plate, and between the transfer roller and the pressing roller The distance is not limited and is adjusted by the thickness of the optical plate. The temperature of the transfer roller is preferably 30C~100°C, and the temperature of the pressing roller is preferably 7〇〇c~12 (rc can be configured at least) the mirror roller is located at the transfer roller. The structure of the mirror roller in the downstream position f' is the same as that of the pressing roller described above. The surface is flat without any microstructure. The mirror roller and the transfer roller cooperate with the rolling optical plate to smoothly transfer the microstructure, and the temperature is 5 〇 It~1〇〇°C. It can also be equipped with at least one conveying roller and at least one take-up roller to drive the movement of the optical plate. The material of the above roller is not material, it can be metal, rubber and other materials. ^ 201242752 When the resin raw material is transferred and pressed, it still needs to be flexible at a high temperature to pass through the curved shape. Therefore, if the temperature of the roller is too low, the resin raw material is cooled. It is easy to generate cracks during the transportation process, and if the roller temperature is too high, the fluidity of the resin material is too high, which is not conducive to the formation of the microstructure. The optical plate of the present invention may include a light diffusing plate, a light guide plate, etc., an optical plate. The thickness is not limited, and is preferably 〇" to J 〇 mm (mm). The thickness of the optical plate refers to the vertical distance from the highest point of the microstructure to the other non-microstructured surface of the optical plate. The thickness of the above optical plate can be obtained by the mode The filling speed of the resin material in the head, the distance between the transfer roller and the pressing roller, and the rotation speed of the transfer roller are controlled. In the filling step of the present invention, the photosensitive resin material is hardened by irradiation with a specific light source. The characteristics of the high fluidity can be sufficiently injected into the molding space of the transfer roller and hardened by light to form a microstructure closer to a predetermined shape. The molding space is covered by the arc on the transfer wheel surface. The resin material is covered by first injecting the above-mentioned light-hardenable photosensitive resin material into the molding space and moving along the rotation of the transfer roller; in addition, the above-mentioned extruded resin material is spirally covered by the transfer roller. On the wheel surface thereof, the tree (four) material (4) is driven by the transfer roller to cover and cover the photosensitive resin material previously injected into the molding space. The injection method of the sensitive resin material into the molding space is not limited to 'Spray, Extrude, etc., and the injection speed of the photosensitive resin material should be appropriately adjusted so that it can be uniformly injected into the molding space. If the material injection speed is too fast, it will not be able to flow uniformly into the entire molding space. If the injection speed is too slow, the photosensitive resin material cannot fill the molding space with the entire process speed. The injection speed of the photosensitive resin material is relatively high. The preferred range is 50 cubic centimeters per minute. meters to 1200 cubic centimeters per minute. meters (injection amount per unit time and unit width), and the above wide width refers to the width of the resin material after extrusion. The material must have both good fluidity and easy hardening by light irradiation, that is, a material capable of undergoing a light-crossing reaction and hardening by light irradiation, for example, can be subjected to ultraviolet light ( UV light) hardened ultraviolet light hardening glue, infrared light hardening glue that can be hardened by infrared light (IR) irradiation Or a halogen light-curing adhesive that can be hardened by halogen light. In the embodiment of the present invention, the photosensitive resin material is an ultraviolet light-curing adhesive, and the composition thereof is not limited. Specific examples thereof include: (a) Acrylic resin, which is used in an amount of 40% by weight to 50%. (b) Free radical photo-initiator, which is used in an amount of 5% by weight to 15% by weight, and a specific example of a radical photoinitiator is Trimethyl Benzoyl Phosphine Oxide (ΤΡΟ), 2-Methyl-l-[4-(Methylthio)phenyl]-2-Morpholino Propan-l-one (Ciba Irgacure 907), Isothioxanthone (ITX) ' or one of these combinations; (c) Reactive Acrylic Reactive acrylic cross-linking resin, which is used in an amount of 40% by weight to 50% by weight, and a specific example of a reactive acrylic cross-linked resin is 〇1-丁1^1116 [11丫1〇1卩1 '0卩&116丁61^3(^5^16(8 feet-355) 'Dipentaerythritol Monohydroxy Pentaacrylate (SR-399) ' Ethoxylated Bisphenol A Diacrylate (SR-349), or one of these groups 10 201242752 In a general case, for example, when the microstructure is a triangular mirror and has a collecting effect, the photosensitive tree of the present invention The difference between the refractive index of the material and the refractive index of the resin material is preferably not more than G.G5, more preferably not (4) 3, and most preferably not more than 0.01. In other cases, for example, the purpose of the microstructure is to disperse light. When the refractive index of the photosensitive resin material is different from the refractive index of the resin material, the light-forming step of the present invention causes the photosensitive resin material to be hardened by light irradiation of the illumination device; Providing equipment including ultraviolet light (UV), infrared light (IR) or self-supplement light, the light must be matched with the photosensitive resin material used, so when the photosensitive resin material is ultraviolet light hardening glue, the light emitting device emits ultraviolet light When the photosensitive resin material is an infrared (or halogen) hardening glue, the illumination device emits infrared light (or halogen light). The optical power of the illumination device is 100 watts/cm (W/cm) to 1000 watts/ In addition, the surface of the light can be placed behind a curved reflector, so that the light sighs more uniform light source. The design of the mirror is not limited, as long as the lighting device can The light is uniformly reflected to the photosensitive resin material, and the photosensitive resin material is hardened by light irradiation of the illumination device, and the mirror may have a triangular structure, a circular structure, a front low rear height, and both sides are inclined. The trapezoidal structure of 0~30 degrees, wherein the front side is low and the rear side is high, and the side edges are inclined structures of ~30 degrees, which can extend the illumination area of the light emitted from the edge of the lamp tube to make the light receiving surface range. Larger and more uniform 11 201242752 The transfer rate of the microstructured optical plate of the present invention is determined by taking a long strip of about 1 cm wide on the side of the microstructure of the optical plate, and measuring the microstructure of the optical plate under an optical microscope. The height ratio of the height to the molding space of the transfer roller is preferably 95% or more, more preferably 97% or more, and most preferably 99% or more. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. Referring to Figures 2, 3 and 4, a preferred embodiment of the method of fabricating a microstructured optical plate having a high transfer rate of the present invention is to fabricate a microstructured optical plate having a plurality of microstructures 212 by a molding apparatus 3. 2, the microstructured optical plate 2 of the present embodiment is a light diffusing plate, but is not limited thereto. The forming device 3 comprises: a die 31 for accommodating a resin material 5, a roller unit 32, and a photosensitive resin material filling. A bottle 33, an illumination device 34, and a mirror 35. Here, a direction 4 is defined by a production line directed downstream from the upstream. In the present embodiment, the left side is the upstream side and the right side is the downstream side. Wherein the roller unit 32 includes two pressing rollers 322, 322 located downstream of the die 31 and spaced apart from each other, a transfer roller 321 spaced apart at the downstream of the pressing rollers 322, 322, and a transfer bearing 321 A mirror roller 324 downstream of the roller 321 and a plurality of transport rollers 323 arranged in the direction 4 in the downstream direction of the mirror roller 324 are sequentially arranged along the production line. The transfer roller 321 has a plurality of protruding transfer microstructures 326 on the wheel surface. The adjacent two transfer microstructures 326 collectively define a molding space 5 12 201242752 30. The pressing rollers 322, 322' and the mirror roller 324 are rollers of the same shape, and the surfaces thereof are all flat and do not have any microstructure. The photosensitive resin material filling bottle 33 is disposed above the transfer roller 321 and houses a photosensitive resin material 6 therein. The material used in this embodiment is ultraviolet light which can be hardened by ultraviolet light (UV light) irradiation. Hardened glue. The mirror 35 is disposed on one side of the transfer roller 321 , specifically, under the transfer roller 321 , and is adjacent to the tread of the transfer roller 321 adjacent to the resin material 5 , the mirror 35 The specific structure is as shown in FIG. 3 'the surface 351 adjacent to the illumination device 34 is approximately trapezoidal, and one of the reflective surfaces 35 2 is low and rear and includes two sides at an angle of 0 to 30 degrees. The side reflective surface 353. The front side of the reflecting surface 352 is low and the height is that the side adjacent to the lighting device 34 is lower, and the side away from the lighting device 34 is higher. The side reflecting surface portion 353 reflects the light emitted from the edge of the tube of the light irradiation unit 34 as indicated by the light A, thereby forming a light irradiation range in which the radiation is extended outward. The illumination device 34 is located on one side of the mirror 35 for providing ultraviolet light illumination, and includes a plurality of ultraviolet lamps 341 capable of emitting ultraviolet light, and an arc located behind the rabbit exterior light 341. The reflector 342 is used to make the light source emitted from the ultraviolet lamp 341 more uniform. Referring to Figures 2, 4 and 5, a method of manufacturing a microstructured optical plate having a high transfer rate of the present invention comprises the following steps: () an ejecting step 71 - ejecting the resin material 5 in the die 31 from the die-opening And it is extruded in a molten plate form. At this time, the material is about $24〇c, and the speed of its extrusion is about kg/h 13 201242752. The resin material 5 of the present embodiment is a styrene resin having a glass transition temperature (Tg) of about 105 °C. After the extruded resin material 5 is first cooled in the air, it passes between the two pressing rollers 322, 322', and has a flat surface due to the pressing rollers 322, 322, so that the pressed rollers 322, 322' are rolled. The surface of the resin material 5 is flat and uniform. Then, after contacting the transfer roller 321 at a contact position 8, the resin material 5 is arc-covered on the wheel surface below the transfer roller 321 and is rolled by the transfer roller 321 to move in the direction 4 toward the production line. For example, the temperature of the upper pressing roller 322 is 8 〇t, and is rotated in the counterclockwise direction, and the temperature of the lower pressing roller 322' is 8 (rC, and is rotated in the clockwise direction). The temperature of the writing roller 321 is 7 〇t. And rotating at a speed of 4 meters/minute in the counterclockwise direction, and the temperature of the mirror roller 324 located downstream of the transfer roller 321 is 6 〇. The resin material 5 arrives downward and contacts the turn. The average temperature A 120 t when the roller 321 is written. In the present embodiment, the average temperature is defined by the center of the resin material 5 when the transfer roller 321 is touched, and the distance between the sides of the resin material 5 is four minutes. In one place, the temperature value of three points is obtained by measuring the average value of the infrared thermometer. (7) Filling step 72: the resin material 5 is pushed out by the die 3 ι and injected into the lower pressing roller 322, and Transducing material 321 while making the photosensitive tree The photosensitive resin material 6 in the material filling bottle 33 is sprayed downward to be injected into the molding space 30' between the adjacent transfer microstructures of the transfer roller 321, and the molding space 3 is covered by the arc. Transfer the tree of the wheel 321 wheel
S 14 201242752 月曰原料5所覆蓋。該光敏樹脂材料6之喷塗速度為600立 方公分/分鐘·公尺。 隨著轉寫滾輪321的轉動，光敏樹脂材料6會注入於 該樹月曰原料5及該轉寫滾輪3 21的表面之間。且該樹脂原 料5在前述各製造條件的配合下，以適當的溫度及可撓曲 度穩定地弧彎貼覆於轉寫滾輪321下半圓並被持續輸送。 (3)光照成型步驟73 :藉由該光照設備34提供光照射， 光照設備34發出的光線被該反射鏡35反射而朝該轉寫滾 輪321照射，使該被充填於成型空間3〇内的光敏樹脂材料 6受到光照而硬化成型。 因此，當樹脂原料5被轉動的壓製滾輪322、322，及轉 寫滾輪321帶動而輸送時，樹脂原料5被壓製成板狀，但 由於樹脂原料5無法充分流動並將所述成型空間3〇完全填 滿，使該成型空間30中形成空隙3〇1(圖4)。然而，所述同 時喷塗於轉寫滾輪321表面的光敏樹脂材料6在經轉寫滾 輪321的滾壓過程中，會受到樹脂原料5的擠壓，並配合 該光敏樹脂材_ 6㈣於樹脂原料5具有較佳的流動性， 因此容易流動並填補空隙謝，進而充分流人填滿所述成型 空間30。 透過上述步驟，該微結構光學板2就成型完畢，並且 該光敏樹脂材料6經光照射硬化後成為所述微結構212的 邰刀成型後的微結構光學板2受到輸送滾輪323的帶 動而繼續往該生產線進行方向4傳送，所述輸送滾輪323 的溫度為室溫，該微結構光學板2被輸送滾輪323輸送帶 15 201242752 動的同時會逐漸地冷卻。 本實施例之微結構212高度為300微米（//〇1)，相鄰微 結構212之最高點間的距離（一般稱為phch)為35〇微米。 本實施例製成的微結構光學板厚度約為〇 7公釐（mm)。 需要說明的是，當較高溫的樹脂原料5接觸溫度較低 的壓製滾輪322、322’及轉寫滾輪321時，自然就會逐漸硬 化，而光敏樹脂材料6必需在該等滾輪轉動滾壓的過程中 ，由該光照设備34提供UV光照射而硬化^在本實施例中 ，光照設備34的UV光功率為240瓦/公分。 本發明光敏樹脂材料6必需選用具有良好流動性的材 料’以利於流動填補該等成型空間3〇中的空隙3〇1，而且 因為各個滾輪具有一定的轉速，所以光敏樹脂材料6還要 能夠配合生產作業而快速硬化，由於其配合光照就可以快 速硬化，因此該光敏樹脂材料6的使用不會影響到製程速 度’使本發明具有與一般生產線相同的生產速度。 值得一提的是，步驟71在押出樹脂原料5的同時還具 有整平效果，透過壓製滾輪322、322,滾壓使樹脂原料5表 面平整，因此在步驟72中，光敏樹脂材料6可以均勻地塗 布在樹脂原料5表面，有利於成型出的微結構均勻性與一 致性，並提高微結構轉寫率。另外，本發明額外設置該反 射鏡35將光照設備34的光線朝上反射，目的在於使光照 設備34與轉寫滚輪321的位置錯開，使光照設備34不位 於該轉寫滾輪321的正下方，避免轉寫滾輪321上的光敏 樹脂材料6向下滴而污染該光照設備34,因為一旦光照設 16 201242752 備34污染’-方面較難以清潔方面會減弱其出光效能 ，進而影響光敏樹脂材料6的固化製程，降低轉寫率。 綜上所述’藉由適當調控模頭31押出之樹脂原料5接 觸至轉寫滾輪321時的溫度，而可讓樹脂原料5維持較佳 的高溫可挽曲性以彎折覆貼於轉寫㈣321之輪面上，搭 配該押出步驟使樹脂補5表面平整並使光敏樹脂材料6 能均勻塗布’而且高流動性的光敏樹脂材# 6容易填滿所 述成型空間3G，並設置反射鏡35使光照設備34不被污染 ’其目的都是用於提高微結構轉寫率，轉寫率可以提升到 95%以上’而可獲得本發明之微結構轉寫率高之微結構光學 板2。 本發明之製造方法簡單、易於施行，而且是在不改變 光學板原始生產流程的情況下進行，因此能應用於現有的 製程設備與生產流程，對產業利用有相當大的助益。 惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發㈣請專利 範圍及發明說明内容所作之簡單的等效變化與㈣，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一種已知光學膜被製造時的示意圖； 圖2疋冑置不意圖，顯示本發明具有高轉寫率的微 結構光學板的製造方法之-較佳實施例，主要是配合本發 明之-個微結構光學板的成型I置來製造該微結構光學板 17 201242752 圖3是一立體圖，主要顯示該較佳實施例的一光照設 備與一反射鏡； 圖4是圖2的局部放大圖；及 圖5是該製造方法之較佳實施例的步驟流程圖。 18 201242752 【主要元件符號說明】 2 .... ……微結構光學板 34....... ••光照設備 212 · ……微結構 341 ·.··. ••紫外光燈 3 .... ……成型裝置 342 ·..·· ••反光罩 30… ……成型空間 35....... ••反射鏡 301 · ……空隙 351 ••表面 31··· ……模頭 352 ...·· ••反光面 32... ......滾輪單元 353 ···.. ••側反光面部 321 · ......轉寫滾輪 4 ........ ••生產線進行方向 322、 322’壓製滾輪 5 ........ …树知原料 323 · ……輸送滾輪 6 ........ ••光敏樹脂材料 324 · ……鏡面滾輪 71〜73·· ••步驟 326 · ……轉寫微結構 8 ........ ••接觸位置 33·.. ......光敏树爿a材料填 A........ ••光線 充瓶 19S 14 201242752 The monthly raw materials are covered by 5. The photosensitive resin material 6 was sprayed at a rate of 600 cubic centimeters per minute per meter. As the transfer roller 321 rotates, the photosensitive resin material 6 is injected between the tree base material 5 and the surface of the transfer roller 321. Further, the resin material 5 is stably attached to the lower semicircle of the transfer roller 321 by an appropriate temperature and flexibility under the cooperation of the above respective manufacturing conditions, and is continuously conveyed. (3) Illumination forming step 73: the illumination device 34 provides light illumination, and the light emitted by the illumination device 34 is reflected by the mirror 35 to be irradiated toward the transfer roller 321, so that the light is filled in the molding space 3〇. The photosensitive resin material 6 is hardened by exposure to light. Therefore, when the resin raw material 5 is conveyed by the rotating pressing rollers 322 and 322 and the transfer roller 321, the resin raw material 5 is pressed into a plate shape, but the resin material 5 cannot flow sufficiently and the molding space is 3〇. Completely filled, a void 3〇1 is formed in the molding space 30 (Fig. 4). However, the photosensitive resin material 6 simultaneously sprayed on the surface of the transfer roller 321 is pressed by the resin material 5 during the rolling process by the transfer roller 321, and is mixed with the photosensitive resin material _ 6 (four) in the resin material. 5 has better fluidity, so it is easy to flow and fill the gap, and then fully fill the molding space 30. Through the above steps, the microstructured optical plate 2 is formed, and the photosensitive resin material 6 is cured by light irradiation, and the microstructured optical plate 2 after the boring of the microstructure 212 is driven by the conveying roller 323 to continue. The production line is transported in the direction 4, the temperature of the transport roller 323 is room temperature, and the microstructured optical plate 2 is gradually cooled by the transport roller 323 conveyor belt 15 201242752. The microstructure 212 of this embodiment has a height of 300 microns (//1) and the distance between the highest points of adjacent microstructures 212 (generally referred to as phch) is 35 microns. The microstructured optical plate produced in this example has a thickness of about 7 mm. It should be noted that when the higher temperature resin raw material 5 is in contact with the lower temperature pressing rollers 322, 322' and the transfer roller 321, the natural resin material 6 is gradually hardened, and the photosensitive resin material 6 must be rolled and rolled on the rollers. During the process, the illumination device 34 provides UV light illumination to harden. In this embodiment, the illumination device 34 has a UV light power of 240 watts/cm. The photosensitive resin material 6 of the present invention must use a material having good fluidity to facilitate filling the gaps 3〇1 in the molding spaces 3, and because the respective rollers have a certain rotation speed, the photosensitive resin material 6 can also be matched. The production process is rapidly hardened, and since it can be hardened quickly by the combination of light, the use of the photosensitive resin material 6 does not affect the process speed 'to make the invention have the same production speed as the general production line. It is worth mentioning that step 71 has a leveling effect while ejecting the resin material 5, and the surface of the resin material 5 is flattened by the pressing rollers 322, 322, so that in step 72, the photosensitive resin material 6 can be uniformly Coating on the surface of the resin material 5 facilitates the uniformity and consistency of the microstructure formed and improves the microstructure transfer rate. In addition, the present invention additionally provides the mirror 35 to reflect the light of the illumination device 34 upward, in order to shift the position of the illumination device 34 and the transfer roller 321 so that the illumination device 34 is not located directly below the transfer roller 321, The photosensitive resin material 6 on the transfer roller 321 is prevented from dropping downward to contaminate the illumination device 34, because once the illumination is set, the light-emitting efficiency is weakened, which affects the photosensitive resin material 6. Curing process, reducing the transfer rate. In summary, by appropriately controlling the temperature at which the resin material 5 extruded from the die 31 contacts the transfer roller 321, the resin material 5 can be maintained at a high temperature for flexibility to be bent over the transfer. (4) The wheel surface of 321 is matched with the extruding step to make the surface of the resin patch 5 flat and the photosensitive resin material 6 can be uniformly coated' and the high-flow photosensitive resin material #6 easily fills the molding space 3G, and the mirror 35 is provided. The illumination device 34 is not contaminated. The purpose of the illumination device 34 is to increase the microstructure transfer rate, and the transfer rate can be increased to 95% or more. The microstructured optical plate 2 having the high microstructure transfer rate of the present invention can be obtained. The manufacturing method of the present invention is simple and easy to implement, and is carried out without changing the original production process of the optical plate, so that it can be applied to existing process equipment and production processes, and is of considerable benefit to industrial utilization. However, the above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent change of the patent scope and the description of the invention according to the present invention (4) All remain within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a known optical film when it is manufactured; FIG. 2 is a schematic view showing a method of manufacturing a microstructured optical plate having a high transfer rate according to the present invention - a preferred embodiment The micro-structured optical plate 17 is mainly manufactured in accordance with the molding I of the micro-structured optical plate of the present invention. 201242752 FIG. 3 is a perspective view mainly showing an illumination device and a mirror of the preferred embodiment; 2 is a partial enlarged view of FIG. 2; and FIG. 5 is a flow chart of the steps of the preferred embodiment of the manufacturing method. 18 201242752 [Description of main component symbols] 2 .... ...... microstructured optical plate 34....... ••illumination device 212 · ......microstructure 341 ·.··.••UV lamp 3 . .........Molding device 342 ·····•• Reflector 30.........Molding space 35.......••Mirror 301 · ......Void 351 ••Surface 31··· ...... Die 352 ...·· ••Reflective surface 32.........Roller unit 353 ···.. ••Side reflective surface 321 ·......Transfer roller 4 ... ..... ••Production line direction 322, 322'press roller 5 ..............tree material 323 ·...feed roller 6 ........ ••photosensitive resin material 324 · Mirror wheel 71~73··••Step 326 · ......Transfer microstructure 8 ........ ••Contact position 33·........photosensitive tree 爿a material filling A........ ••Light filling bottle 19