1362529 九、發明說明： 【發明所屬之技術領域] 本發明係有關於一種用 光學膜片，尤指一種光學犋片二=豎紋干涉並控制視角之 發生之疊紋現象，並能改變肖除一般立體顯示技術中 持一定的光偏振態守恆，$ 、、泉垂直與水平配光視角且維 性。 ’·’持顯示器之高輝度與高對比 【先前抆術】 一般液晶顯示器，暴貝$ 真實物體的遠近與景深，近像為平面影像’無法感受 重視，3D立體影像的顯示二3D立體影像技術越來越受 要的視聽娛樂用途外，醫療中^可以用於許多場合，除了主 很早就使用類似的立體顯示的〜些病理與切片觀察技術 像技術也可用於一些較為珍走衡來觀察病理，此外立體影 展示。 ☆貝的藝術珍品或飾品的觀賞與 立體影像的技術有許多實 像是利用不同角度的攝影機柏^方式，早期之紅綠立體影 但是這種技術無法將顏色有j影像之視差的立體技術， 之立體圖，則利用電腦軟體來。而另一種ΐ機點 再經雙眼觀看融合成立體;t來綱明暗的隱=’ 像。還有利用柱狀透鏡陣列 (1__Γ丨⑽抓㈣之成像將不同視角觀看的連續立體影 像表現出來’可以造成影像縮、連續變圖、與前後深淺之 立體效果。還有利用視差屏障技術來造成左右眼視覺視差 5 1362529 的立體技術等，以及使用立體全像術來.拍攝及重建之立體 影像。最後還有利用偏振光(Polarization Light)反覆切換的 特性來拍攝之立體顯像技術，此技術使用液晶顯示器快速 切換影像的偏振態，也可以造成不同的景深與3D的效果。 請配合參閱第一圖所示’顯示傳統利用偏振光切換技 術之3D立體影像之架構圖，圖中之概念顯示需在兩片[CD 液，面板5中間放置一片光學膜片6來達成偏振保持，消 除豐紋，維持特定水平與垂直視角需求的示意架構圖。傳 、’先技藝中此類膜片製作目前是以全像干涉術 殊全像光學膜 >；為主，此膜片之Μ技藝有如錢專利】 US6998196號所揭露之此全像光學繞射元件(η〇ε)之膜片 製作方式與原理，此傳統全像母片製作方❹用雷射光將 干涉光之振幅、相位紀錄於鹵化銀底片或特定感光材料， =影.、定影、漂自等製程再重建繞射之光場，過程複雜 矜屮^ - I —圖，^中顯示此種3D立體技術需要兩張可 :的切換I/更Ϊ 7來搭配各自的LCD液晶面板5來做偏 來處理編二：I处理’而輪出晝面必須是先經過特定軟體1362529 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to an optical film, in particular to an optical slab, which has two vertical stripes and interferes with the control of the viewing angle, and can change the smear phenomenon. Generally, the stereoscopic display technology maintains a certain polarization state of light polarization, and the vertical and horizontal light distribution angles of the spring and the horizontal are dimensionality. '·' Holds the high brightness and high contrast of the display. [Previous 抆 】 General LCD display, violent shell $ real object's distance and depth of field, near image for flat image 'can not feel the importance, 3D stereoscopic image display 2 3D stereoscopic image technology More and more popular audiovisual entertainment purposes, medical can be used in many occasions, in addition to the main use of similar stereoscopic display of some of the pathology and slice observation technology like technology can also be used for some more precious to observe Pathology, in addition to stereoscopic display. ☆Bei's art treasures or jewelry viewing and stereoscopic image technology have many real images using different angles of the camera cymbal cymbal method, the early red and green stereoscopic shadow but this technology can not have the stereoscopic technology of j image parallax, The stereo image is made using computer software. Another kind of downtime point is to see the fusion body through the eyes; t to hide the dark hidden = 'image. There is also the use of a lenticular lens array (1__Γ丨(10) grabbing (4) imaging to display continuous stereoscopic images viewed from different viewing angles', which can cause image shrinkage, continuous deformation, and stereoscopic effects before and after. Also use parallax barrier technology to create The stereoscopic technology of the left and right eye visual parallax 5 1362529, and the stereoscopic image captured and reconstructed using stereo holography. Finally, the stereoscopic imaging technology is adopted to capture the characteristics of the polarization switching (Polarization Light). Using the LCD display to quickly switch the polarization state of the image can also result in different depth of field and 3D effects. Please refer to the architecture diagram showing the traditional 3D stereo image using polarization switching technology as shown in the first figure. It is necessary to place an optical film 6 in the middle of the two [CD liquid, panel 5 to achieve polarization retention, eliminate the coarse grain, and maintain the schematic structure of the specific horizontal and vertical viewing angles. It is based on holographic interferometry, such as optical film >; the film is the same as the money patent] US6998196 The method and principle of fabricating the holographic optical diffraction element (η〇ε) disclosed by the conventional holographic mastering method, using laser light to record the amplitude and phase of the interference light on a silver halide negative film or a specific photosensitive Material, = shadow, fixing, drifting, etc. Re-reconstruction of the diffracted light field, the process is complicated 矜屮 ^ - I - map, ^ shows that this 3D stereo technology requires two: switch I / more Ϊ 7 Come with the respective LCD panel 5 to do the bias to deal with the second: I process 'and the wheel must be first through the specific software
立體影像。’Λ眼配Τ偏光眼鏡來觀賞就可產生真實的3D 輸入之換造成之3D立體影像技術主要原理是:當 製器—晶面祕⑽等輸 見曰留現象，極短時間的快速切換來控 鏡片後影像之偏振光狀態，此時搭配偏振 由左右眼的視的影像具有不同的偏振狀態，藉 顯示影像所^角目度與运近差異突顯出，進而造成3D立體 釋成為一 3乃 差見象，攻後兩眼影像經大腦融合並解 用與改良；=像:此類型的立體影像技術有許多的應 多台投影機居&、員似頭戴顯示器(HMD)之3D技術等，與 有幾個特色，第^立體電影等。而此類型的3D顯示器主要 二，輪出影信去二，使用—片或兩片LCD來輪出影像。第 輪出之顯示望身需經過特殊軟體來處理編碼且常需有雙 片或偏振目艮鏡支援。第三’此立體影像需要使用偏振 光學聪片^、 迷，立崎心3D立體影像技術的使用方式大致如下所 像時，此兩^像技術當使用到兩片重疊之LCD來輸出影 會被糢糊化且vLCD需緊密地重疊在一起，否則兩者影像將 但在此兩片破此曰受到晝面互相干擾而影響晝質清晰度，Stereoscopic image. The main principle of 3D stereoscopic image technology is to create a true 3D input. The main principle of the 3D stereoscopic image technology is: when the controller-crystal surface secret (10) is lost, the fast switching is very short. After controlling the polarization state of the image after the lens, the image with the polarization of the left and right eyes has different polarization states, and the difference between the angle of view and the approach of the image is highlighted, thereby causing the 3D stereoscopic release to become a 3 Poor image, after the attack, the two eyes are merged and solved and improved by the brain; = like: This type of stereoscopic image technology has many 3D technologies that should be used by multiple projectors, and like head-mounted displays (HMD). Etc., with a few features, the first ^ stereo movie and so on. The main type of 3D display is two, the second round of the video letter to the second, the use of - or two LCD to rotate the image. In the first round, the display is subject to special software to process the code and often requires two-piece or polarized eyepiece support. The third 'this stereoscopic image needs to use polarized optical Cong film ^, fans, Lisaki heart 3D stereoscopic image technology is used as follows, the two ^ image technology when using two overlapping LCD to output the image will be blurred And the vLCDs need to be closely overlapped, otherwise the two images will be affected by the interference between the two images.
的晝素(pixei 2噓合韋岔貼合一起使用時，由於兩片LCD 就會造成嚴）。構大小過於規律化，且兩者尺寸相近或相同 質受到干^重之光學干涉之疊紋(moire)現象，使得影像品 上為明亮相係、文的嚴重干擾’所產生的疊紋干涉條紋大致 之光線&段2的紋路’此條紋隨著觀察者的視角與所使用 而有改變Γ與兩緊貼之液晶面板的晝素的相對位置與方向 不合粒< 总有時產生的疊紋條紋當人的眼睛無法鑑別時就 勿铍發現其存在。 —_ΠΠ. 力又而， .^ 〇此1豐紋將會嚴童影響液晶顯示的晝面品 1362529 藝中避免的重要問題。所以-般在先前技 消除叠紋的_，加上一張特殊的光學膜片來 低#紋的影響，但使用全像式光學膜片來降 易普及製作而且價式膜ΐ的技術門捏較高，不 大時，就需要大面㈤二X且當使用的顯示器越來越 光干涉時的物 須有更大的平行擴束面積越大則雷射光就必 頭其體積也相當大，^^置+，晕涉到的光學專用擴束鏡 透知*之離軸像差也越大，故复均勺 H制’所以相對其成本極高與製侧難。 照射功率明:不域:::的均勻性不佳與雷射 像膜片之表面結構體的s率;射 示器的尺寸就受到嚴=:===_ 作方式下其膜片的⑻ 而對…體影像視角分佈， 不對稱視角的需求就中：而要的特殊視角需求或 也有過大或過小的問題二:且使用一般擴散片的視角 ’碭’使用此—般傳統之擴散m片都; 8 529 嚴重造成晝素影像的模糊， :度r_3D立體影像的-度=;= 點之光學膜5何:::種::解決上述習知技術的各種缺 片也能克服傳，二二軸對稱的先天限制。此膜 大面積化與價袼非常“ Ί片的不易量產製造與 術中極為_且極欲解決的課題’。貫為目前3D立體影像技 【發明内容】 於:所述習知技術缺點’本發明之主要目的在 體，在ί::子^材之上下兩表面分別製作不同之結構 結構，弧型輪廓延伸之長條 結構，_上下㈣出微細之點狀凹凸的-. 、、，°構分別為長條狀與凹凸點狀結構兩 所需之非t異與上下表面兩者之形狀曲率變化來改變 配光角度分佈，可造成垂直與水平視角的差 全像視角差異的光學特性則可達成傳統 象^月吴片具有非對稱的配光特性。針對本發明之光學 、’、下表面之弧狀長條結構尺寸與點狀之凹凸結構尺 1362529 寸與3D立體影像使用.之兩片LCD的像素結構尺寸可能會 產生光學干涉（Interference)之空間頻率（Spadal Frequency) 作其干涉空間頻率的頻率迴避，來消除並降低眼睛會察覺 之各拍頻干涉之較低頻空間頻率下的疊紋干涉現象。故本 膜片之結構能有效破壞3D影像顯示技術中因使用兩片重 car LCD可能產生相近且近同調(c〇fa(erent)之光程差 Path Difference)，而能夠用來消除疊紋的問題，而利用弧 狀長條結構來調整水平與垂直視角的配光特性，且能維持 經過液晶後光線的特定偏振狀態，能避免漏光問題。 為了解決上述技術問題，根據本發明之其中一種方 案，提供-種用於消除疊紋干涉並控制視角之光學膜片， ^成形於基材的上下表面之不同微結構，其特徵在於：該 f材係以兩分子之透光材質製成，上述成形於該基板的-^之微結構料至少—軌弧形輪_延狀長條微結 $二=成形於該基板的另—表面之微結構 — 對片係控制光線㈣分雜 .的水本發明之光學膜片，能改變經LCD之光線 輝产視負、二視^ ’並可以造成非傳統擴散片之圓對稱之 =配立體影像用LCD顯示所需之特殊視 角要求，亚有效消除兩片LCD △ 象，.並能維持經過液a後并飧& 且、產生的厭重贫、，·見 Α 了 t公的偏振狀態，避免漏光問題。 技術為解本發明為達成預定目的所採取之 技術托及功效，請麥閱以下有關本發明之詳細說明與 10 1362529 附圖’相信本發明之目的、特徵與特點，當可由此得一深 入且具體之瞭解，然而所附圖式僅提供參考與說明用，並 非用來對本發明加以限制者。 【實施方式】 在本發明被詳細描述之前，要注意的是，在以下說明 内谷中’類似的元件是以相同的編號來表示，此外所附圖 示僅是示意，而非依照一定的比例繪圖。 再請配合參閱第二圖所示’其為本發明之光學膜片之 第一實施例，該光學膜片係控制光線視角分佈使其配光呈 現非軸對稱之分佈，並且該光學膜片的最大與最小之配光 視角角度差異介於2度〜37度之間。本光學膜片本體包含基 材’1 a及上表面結構2a與下表面結構3a，其中上表面結構 2a包含至少一種類之微結構弧形長條體2ia，而微結構弧形 長條體21a之表面形狀可由NURBS (非均勻有理B樣條） 曲面組成，或由傳統光學所述及的球面，與非球面曲線、 SPLINE (内插方式）曲線，或BEZIER (皮埃爾曲線）曲 、、泉方私式專組成之輪廓，如第二圖所示之曲線線條輪廓 21 la則由橢圓圓錐曲線之部分輪廓曲線所構成之橢圓非球 面曲線，其中微結構弧形長條體21a可為由曲線線條輪廓 hla構成之加工刀具路徑沿特定之直線方向來延展加工成 形製作。但為了更有效消除因長條結構本身固定週期下而 又與液晶面板產生之額外頻率之干涉條紋，亦可使用曲線 婉蜒(如呈現反賴似S龍動之㈣)的方式將曲線線條 丄观y29 輪廓2lla沿特定曲線(如呈現反複類似s型振動之軌跡)婉 蜒延展出如河流反覆婉蜒之非球面微結構凸條體來降低此 干以條、’文=發生現象。而此長條或蜿蜒狀之結構實際加工 方式可以藉由超精密加工刀具與電腦數值控制之加工機來 刻劃出此直條狀或s魏蜒狀之微結構弧形長條體仏，而 下表面結構3a則設置許多之點狀結構體3U。 再明參考第二圖所示，其為本發明之身二實施例，上 表面=構2b包含至少一種類之微結構弧形長條體21b，其 亦可A置相對於基材lb本體有一旋轉角度4b，即此微結構 孤形長條體21b之長條延伸方向不需要平行或垂直設置於 基材lb本體之上，設計此旋轉角度4b的優點是將可以用 來Μ调光學膜片配光的視角分佈與調整膜片本身空間頻率 的水平與垂直的分量比重，因為各種尺寸LCD液晶顯示器 的晝素大小都因製造的廠商不同而有些差異性，而配光之 視角則可藉由此旋轉角度4b來微調改變。此微結構弧形長 條體21b可為由曲線線條輪廓211b構成之加工刀具路徑沿 特定之直線方向來延展加工成形製作。 再請參閱第四圖所示，其為本發明第二實施例之光學 膜片之下表面所設置之點狀結構體31b，圖中顯示其下表面 結構3b設置許多凸起之點狀結構體31b，此點狀結構體31b 亦可改設置為囟狀結構體，或者使凹狀與凸狀點狀物同時 設置存在於下表面上。凹凸點狀物兩著差異主要在於凸狀 與凹狀點狀物以微透鏡成像理論而言’其透鏡等效的前後 焦距有差異性；其擴散光線所需的空間位置與擴散之距離 12 1362529 長短就有不同。此點狀結構體31b之製作方式則可以使用 蝕刻（Etching)或以精密刀具採用壓花方式或特定路徑切削 加工或以喷塗顆粒等傳統方式製作出。第四圖中顯示本實 ' 施中結構體本身類似部分隆起之小山丘或類似部分球形的 . 形狀，而點狀結構體31b的排列方式則為隨機的均勻分佈 ' 於下表面結構3b之上。 ' 請再參考第五圖所示為本發明之第三實施例，上表面 $ 結構2c包含至少一種類之微結構弧形長條體21c，其可為 由曲線線條輪廓211c構成之加工刀具路徑沿特定之直線方 南來延展加工成形製作，並且此微結構弧形長條體21c亦 可設置相對於基材lc本體有一旋轉角度4c。此微結構弧形· 長條體21c亦可以改設置成為完全相反之四狀之弧形長 條，凹狀與凸狀弧形長條差異在於兩者發散光線之前後近 軸焦點位置有所差異，這將會造成擴散角度與擴散距離的 些微不同。所述之微結構弧形長條體21c之形狀也可設置 成為完全相反之微結構弧形凹狀長條，或者可使用多種不 • 同形狀之弧形ώ狀與弧形凸狀長條結構同時並存設置，根 據光學重疊（Superposition)原理來製作更多樣化的配光曲線 - 需求，改變微結構透鏡的等效前焦點與後焦點與基材lc的 - 材料與成型膠類之折射率，都會影響光線經本光學膜片後 擴散的角度與擴散的距離。再者，第三實施例之光學膜片 之下表面結構3c設置許多凸起之點狀結構體31c。 本發明之光學膜片之基材（la，lb，lc)之本體材料，係以 高分子透光材質製成，該高分子透光材質係選自於由聚甲 13 1362529 基丙稀酸曱酯(polymethylmethacrylate，PMMA)、聚碳酸酯 樹脂（Polycarbonate，PC)、曱基丙烯酸曱酯聚苯乙烯 (Methylmethacrylate Styrene，MS)及聚笨乙烯(p〇iystyrene， ' PS)或飽和多元酯(PET)等組成材料群組中之任一種材料，而 . 本發明中的具消除疊紋及控制視角之光學膜片之製作方式 步驟為:經光學設計之結構由精密模具加工完成後再利用紫 外光(UV)固化成型等製程製作，其製作方式亦可以使用押 I 出（Extrusion)等製程製作，或使用熱壓(Emb〇ssing)或滾壓製 程(Rollerto Roller)來大量生產本發明之膜片。 上述實施例中，該長條微結構體(21a，21b，21c)之曲線 線條輪廓（211a，211b，211c)可由至少一種線條單元所組 成’當然亦可係由非球面線條、直線、NURBS曲線、SpLINE 曲線、BEZIER曲線及圓弧線條等不同線條相互搭配共同組 合，並將此曲線延伸成形，進而構成一種複合式非球面 (Compound Asphere Surface)。此非球面形狀之微結構弧形 .長條體(2la，2lb，21〇之寬度週期大小可從數十微米（㈣到 鲁近百微米皆可，:本發明案中的弧狀長條結構體(2ia, 2ib，21c) 之結構見度因精密加工刀具的尺寸限制與眼睛的解析度考 •量經計算評估約可設計在8〜9〇微米左右，實施例之較佳設 、計值約在20〜60微米左右’而結構深度則可設計在3〜20微 米左右，本案之實施例三之結構較佳值約設計在3 Μ·5 微米之間’弧狀長條結構體(2la，21b, 21c)之結構深度與寬 度比值約為0.03〜2.5之間，而下表面結構以％，3c)設置之 點狀結構體(31a，31b，31c)其深度約在uo微米之間。須知 1362529 此上下表面設置之結構設計尺寸與形狀會隨兩LCD.之晝素 大小與視角需求等相對條件改變而所有變異。 因此’有關於本發明所製作能消除疊紋與改變視角之 光學膜片的上下表面結構設計方式，係以非球面方程式搭 配光學設計程式來優化表面上的非球面微結構形狀，利用 結構形狀曲率半徑變化與非球面係數變化與膜片基材與結 構體之光學折射率差異來控制擴散出光的角度比例與大 小。因為上表面結構(2a，2b，2c)設置之結構形狀為長條之弧 狀柱狀體’非一般傳統透鏡對光軸(Optical Axis)旋轉轴對稱 的形狀，所以本發明之膜片其水平與垂直之視角分佈將會 有明顯差異性。並於本光學膜片的下表面結構(3a, 3b，3e) δ又置點狀結構體(31a，31b，31c)，其結構可為凸起亦可為凹 陷狀，凹或凸的結構與其大小與深度將會影響出光的視角 大小。一般而言，此點狀結構曲率半徑越小或深度越深時， 其擴散角度越大，此具凹凸狀之點狀結構體(31a，31b，31幻 之深度大小約為1〜20 μηι，較佳值約為3〜9 μηι。 一般而言，若以日本Nipp〇n Densh〇ku社所製作販賣之 GC5000L擴散度儀器測量本發明之光學膜片所有的中方向 角度（類似地球經緯度之經度角之經度方向）後，測量其正負 90枣方向内之i己光曲線’比較其最大與最小的φ方向角产 之半功率全視角（FWHM)，其17^¥11%視角差異值應會大於 2度，但太大之FWHM視角差異也會造成輝度過度下降盥 畫質變模糊的問題，本發明之實施例中的最佳設計值約6.5 度到18.5度之間’可以維持較佳的擴散度又不至於破壞過When the pixei 2 is used together, it will be caused by two LCDs. The size of the structure is too regular, and the two are similar in size or the same quality is subjected to the moire phenomenon of the optical interference of the dry weight, so that the image is a bright phase, and the interference interference fringe generated by the text is severely disturbed. Approximate light & section 2's texture 'this stripe changes with the observer's viewing angle and use, and the relative position and orientation of the two liquid crystal panels are not granulated. < Stripe stripes When a person's eyes cannot be identified, they should not be found. —_ΠΠ. Force and then, .^ 〇 1 1 1 1 1 1 严 严 严 严 1 1 1 1 1 1 1 1 1 1 1 362 362 362 362 362 362 1 362 1 So - in the previous technique to eliminate the crease, plus a special optical film to reduce the impact of the pattern, but the use of holographic optical film to reduce the popularity of the production and the price of the membrane technology Higher, less large, you need large face (five) two X and when the display used more and more light interference, the larger the parallel expansion area, the larger the laser light will be. ^^Set+, the optical special beam-expanding mirror that is fainted is known to have a larger off-axis aberration, so the complex average spoon H system' is relatively high in cost and difficult to manufacture. The illumination power is clear: the uniformity of the non-domain::: is not good with the s ratio of the surface structure of the laser image film; the size of the emitter is severely corrected::===_ The diaphragm of the method is (8) For the perspective distribution of the image, the demand for the asymmetric perspective is in the middle: the special perspective needs are also too large or too small. Second, and the angle of the general diffuser is used, '砀' uses this traditional diffusion of m slices. 8 529 Seriously causing blurring of the image of the alizarin, : degree of r_3D stereo image - degree =; = optical film of the point 5::: species:: solving the various missing pieces of the above-mentioned conventional technology can also overcome the transmission, two Innate confinement of biaxial symmetry. The large area and price of this film are very "difficult to mass-produce and produce the film and the problem that is extremely difficult to solve in the process". The current 3D stereoscopic image technology [invention content]: the above-mentioned technical disadvantages The main purpose of the invention is to make different structural structures on the lower surface of the ί:: sub-material, the long-shaped structure of the arc-shaped contour extension, _ up and down (four) out of the fine point-like irregularities -.,,, ° The optical characteristics of the difference between the vertical and horizontal viewing angles of the omni-directional viewing angle can be changed by changing the shape curvature of the two strips and the concave-convex structure. It can be achieved that the traditional image has asymmetrical light distribution characteristics. For the optical, 'the lower surface of the arc-shaped strip structure size and the point-like concave and convex structure ruler 1362529 inch and 3D stereo image use. The pixel structure size of the LCD may generate the spatial frequency of the interference (Spadal Frequency) as the frequency avoidance of the interference spatial frequency to eliminate and reduce the beat frequency interference perceived by the eye. The phenomenon of the moiré interference at the frequency of the space. Therefore, the structure of the diaphragm can effectively destroy the 3D image display technology. The use of two heavy-duty car LCDs may produce similar and near-coherence (c〇fa (erent) optical path difference Path Difference ), and can be used to eliminate the problem of moiré, and the arc-shaped strip structure is used to adjust the light distribution characteristics of the horizontal and vertical viewing angles, and the specific polarization state of the light passing through the liquid crystal can be maintained, thereby avoiding the light leakage problem. Technical Problem According to one aspect of the present invention, there is provided an optical film for eliminating moiré interference and controlling a viewing angle, and a different microstructure formed on upper and lower surfaces of a substrate, characterized in that the f material is Two molecules of light-transmitting material, the microstructure material formed on the substrate is at least - a curved arc wheel - a long strip micro-junction $ two = microstructure formed on the other surface of the substrate - The film control light (four) is divided into water. The optical film of the invention can change the light ray of the LCD through the negative light, the second view ^ ' and can cause the circular symmetry of the non-conventional diffuser = with the stereoscopic image LCD display Required The special viewing angle requires that the sub-effectively eliminates two LCD △ images, and can maintain the enthalpy of the liquid after passing through the liquid a, and the resulting polarization is poor, and the polarization state of the public is avoided to avoid light leakage. In order to solve the technical support and effect of the present invention in order to achieve the intended purpose, please refer to the following detailed description of the present invention and 10 1362529 the drawing 'believes the purpose, features and characteristics of the present invention, and can obtain an in-depth and specific The present invention is to be understood as being limited and not limited by the scope of the invention. [Embodiment] Before the present invention is described in detail, it is noted that in the following description The same reference numerals are used to indicate the same, and the accompanying drawings are merely schematic and not drawn to scale. Referring again to the first embodiment of the optical film of the present invention, the optical film system controls the distribution of the light viewing angle so that the light distribution exhibits a non-axisymmetric distribution, and the optical film is The difference between the maximum and minimum viewing angles is between 2 and 37 degrees. The optical film body comprises a substrate '1 a and an upper surface structure 2a and a lower surface structure 3a, wherein the upper surface structure 2a comprises at least one type of microstructured curved elongated body 2ia, and the microstructured curved elongated body 21a The surface shape may consist of a NURBS (non-uniform rational B-spline) surface, or a spherical surface as described by conventional optics, with an aspheric curve, SPLINE (interpolation) curve, or BEZIER (Pierre Curve), The outline of the private composition of the spring side, such as the curve line outline 21 la shown in the second figure, is an elliptical aspheric curve composed of a partial contour curve of the elliptical conic curve, wherein the microstructured curved strip body 21a can be The machining tool path formed by the curved line contour hla is stretched and formed in a specific linear direction. However, in order to more effectively eliminate the interference fringes due to the additional frequency generated by the liquid crystal panel during the fixed period of the strip structure itself, the curve 婉蜒 can also be used (such as the appearance of the swaying (S)). Viewing the y29 contour 2lla along a specific curve (such as the trajectory of repeated s-type vibrations), the aspherical microstructured ribs such as rivers are extended to reduce the dryness and the phenomenon. The actual processing method of the long strip or braided structure can be characterized by the ultra-precision machining tool and the computer numerically controlled processing machine to draw the straight strip or sigma-like microstructure curved strip body. The lower surface structure 3a is provided with a plurality of dot structures 3U. Referring again to the second figure, which is the second embodiment of the present invention, the upper surface = 2b includes at least one type of microstructured curved elongated body 21b, which may also be disposed A with respect to the substrate lb body. The rotation angle 4b, that is, the extending direction of the strip of the microstructured elongated strip 21b does not need to be disposed in parallel or perpendicularly on the body of the substrate lb. The advantage of designing the rotation angle 4b is that it can be used to adjust the optical film. The distribution of the viewing angle of the light distribution and the horizontal and vertical component specific gravity of the spatial frequency of the diaphragm itself, because the size of the LCD of various sizes of LCD liquid crystals is different due to the manufacturer, and the viewing angle of the light distribution can be This rotation angle 4b is used to fine tune the change. The microstructured arcuate elongated body 21b can be formed by extending the machining tool path formed by the curved line contour 211b in a specific linear direction. Referring to FIG. 4 again, the dot structure 31b provided on the lower surface of the optical film of the second embodiment of the present invention is shown in the figure, wherein the lower surface structure 3b is provided with a plurality of raised dot structures. 31b, the dot structure 31b may be modified to be a beak-like structure, or the concave and convex dots may be simultaneously provided on the lower surface. The difference between the bumps and the dots is mainly due to the fact that the convex and concave dots have different front and back focal lengths of the lens in terms of microlens imaging theory; the spatial position and diffusion distance required for diffusing light is 12 1362529 The length is different. The formation of the dot structure 31b can be carried out by etching or by a conventional tool using an embossing method or a specific path cutting process or by spraying particles. The fourth figure shows that the structure itself is similar to a partially raised hill or a similar partial spherical shape, and the point structure 31b is arranged in a random uniform distribution on the lower surface structure 3b. . Referring to the fifth embodiment, a third embodiment of the present invention, the upper surface structure 2c includes at least one type of microstructured curved elongated body 21c, which may be a machining tool path formed by a curved line contour 211c. The forming and forming is performed along a specific straight line, and the microstructured elongated strip 21c may also be provided with a rotation angle 4c with respect to the body of the substrate lc. The microstructured arc-shaped stripe 21c can also be modified to be a completely opposite-shaped arc-shaped strip. The difference between the concave and convex arc-shaped strips is that the position of the paraxial focus is different before the two diverges the light. This will cause the diffusion angle to be slightly different from the diffusion distance. The shape of the microstructured curved elongated body 21c may also be set to be a completely opposite curved curved concave strip, or a plurality of curved and curved convex strips of the same shape may be used. At the same time coexisting settings, according to the principle of optical superposition (Superposition) to make a more diverse distribution curve - the demand, change the equivalent front focus and back focus of the microstructure lens and the substrate lc - the refractive index of the material and molding It will affect the angle of diffusion and the distance of diffusion of light after passing through the optical film. Further, the optical film lower surface structure 3c of the third embodiment is provided with a plurality of convex dot-like structures 31c. The bulk material of the substrate (la, lb, lc) of the optical film of the present invention is made of a polymer transparent material selected from the group consisting of polymethyl 13 1362529 bismuth acrylate Polymethylmethacrylate (PMMA), Polycarbonate (PC), Methylmethacrylate Styrene (MS) and Polystyrene ('PS) or Saturated Polyester (PET) And any one of the materials in the group of materials, and the optical film having the anti-aliasing and control angle of view in the invention is prepared by the optically designed structure being processed by the precision mold and then using ultraviolet light ( UV) Curing and other processes can be produced by using a process such as Extrusion, or using a thermoforming (Emb〇ssing) or Rollerto Roller to mass produce the film of the present invention. In the above embodiment, the curved line contours (211a, 211b, 211c) of the elongated microstructures (21a, 21b, 21c) may be composed of at least one line unit. Of course, the aspherical lines, straight lines, NURBS curves may also be used. Different lines such as SpLINE curve, BEZIER curve and arc line are combined with each other, and the curve is extended to form a Compound Asphere Surface. The microstructure of the aspherical shape is curved. The strip body (2 la, 2 lb, 21 〇 width period can be from tens of micrometers ((4) to Lu nearly 100 micrometers): the arc-shaped strip structure in the present invention The structure of the body (2ia, 2ib, 21c) is limited by the size limit of the precision machining tool and the resolution of the eye. The calculation can be designed to be about 8~9〇 microns. The structure depth can be about 3~20 microns, and the structure depth of the third embodiment is about 3 Μ·5 microns. , 21b, 21c) has a structure depth to width ratio of between about 0.03 and 2.5, and the lower surface structure of the dot structure (31a, 31b, 31c) disposed at %, 3c) has a depth of between about uo micron. Note 1362529 The size and shape of the structure design of the upper and lower surfaces will vary with the relative conditions of the two LCDs, such as the size of the element and the viewing angle. Therefore, the optical film produced by the present invention can eliminate the moiré and change the viewing angle. The upper and lower surface structure of the sheet is designed in an aspherical manner. The optical design program is used to optimize the aspherical microstructure of the surface, and the angular proportion and size of the diffused light are controlled by the change of the radius of curvature of the structural shape and the change of the aspherical coefficient and the optical refractive index difference between the film substrate and the structure. Since the upper surface structure (2a, 2b, 2c) is provided with a structural shape of a long arc-shaped columnar body, a non-conventional conventional lens has an axisymmetric shape to the optical axis (Optical Axis), so the film of the present invention has a horizontal level. There will be a significant difference from the vertical viewing angle distribution, and the lower surface structure (3a, 3b, 3e) of the optical film is further provided with a dot structure (31a, 31b, 31c), and the structure thereof may be a convex It can also be a concave, concave or convex structure and its size and depth will affect the angle of view of the light. Generally, the smaller the radius of curvature or the deeper the depth of the point structure, the larger the diffusion angle. The shape of the dot-like structure (31a, 31b, 31) is about 1 to 20 μηι, preferably about 3 to 9 μηι. In general, it is sold under the Japanese Nipp〇n Densh〇ku Society. GC5000L diffusometer After measuring all the median angles of the optical film of the present invention (similar to the longitude direction of the longitude angle of the earth latitude and longitude), the i-light curve in the positive and negative 90-day direction is measured, and the maximum and minimum φ direction angles are compared. The power full viewing angle (FWHM), the 17^¥11% viewing angle difference value should be greater than 2 degrees, but the too large FWHM viewing angle difference will also cause the luminance to be excessively reduced, and the image quality becomes blurred, in the embodiment of the present invention. The optimum design value is between 6.5 degrees and 18.5 degrees' to maintain a good diffusion without destroying