200931121 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種用於消除疊紋干涉並控制視角之 光學膜片，尤指一種光學膜片能消除一般立體顯示技術中 發生之疊紋現象，並能改變光線垂直與水平配光視角且維 持一定的光偏振態守恆，以維持顯示器之高輝度與高對比 性。 【先前技術】 一般液晶顯示器，顯示之影像為平面影像，無法感受 真實物體的遠近與景深，近年來3D立體影像技術越來越受 重視，3D立體影像的顯示技術可以用於許多場合，除了主 要的視聽娛樂用途外，醫療中的一些病理與切片觀察技術 很早就使用類似的立體顯示技術來觀察病理，此外立體影 像技術也可用於一些較為珍貴的藝術珍品或飾品的觀賞與 展示。 立體影像的技術有許多實現方式，早期之紅綠立體影 像是利用不同角度的攝影機拍攝影像之視差的立體技術， 但是這種技術無法將顏色有效表現出來。而另一種隨機點 之立體圖，則利用電腦軟體處理來表現出明暗的隱藏圖， 再經雙眼觀看融合成立體圖像。還有利用柱狀透鏡陣列 (lenticular lens array)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 200931121 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(p〇〗arjzati〇n 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。200931121 IX. Description of the Invention: [Technical Field] The present invention relates to an optical film for eliminating moiré interference and controlling a viewing angle, and more particularly to an optical film capable of eliminating the occurrence of rubbing in a general stereoscopic display technology. Phenomenon, and can change the vertical and horizontal light distribution angle of the light and maintain a certain polarization of the light polarization to maintain the high brightness and high contrast of the display. [Prior Art] Generally, the liquid crystal display displays a flat image and cannot feel the distance and depth of the real object. In recent years, 3D stereoscopic image technology has been paid more and more attention. The display technology of 3D stereoscopic image can be used in many occasions except for the main In addition to audiovisual entertainment, some pathology and section observation techniques in medical use have long used similar stereoscopic display techniques to observe pathology. In addition, stereoscopic imaging technology can also be used for the viewing and display of some more precious art treasures or ornaments. There are many implementations of stereoscopic image technology. Early red-green stereoscopic images were stereoscopic techniques for capturing parallax of images using cameras of different angles, but this technique does not effectively represent colors. Another stereogram of a random point is processed by computer software to display a hidden image of light and dark, and then the fusion image is formed by both eyes. Also, the continuous stereoscopic image viewed from different viewing angles can be expressed by the imaging of a lenticular lens array, which can cause image shrinkage, continuous image transformation, and stereoscopic effects of front and back depth. There are also stereoscopic techniques that use parallax barrier technology to create left and right eye visual parallax 5 200931121, as well as stereoscopic images that are captured and reconstructed using stereo holography. Finally, there is a stereoscopic imaging technique that uses polarized light (p〇 arjzati〇n Light) to switch over. This technique uses a liquid crystal display to quickly switch the polarization state of the image, which can also result in different depth of field and 3D effects.
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lCD 液，面板5中間放置一片光學膜片6來達成偏振保持，消 除宜，’維持特定水平與垂直視角需求的示意架構圖。傳 統技勢中此類膜片製作目前是以全像干涉術所製作出之特 縣像H則為主，韻#之先前技藝有如美國專利號 ，6998196號所揭露之此全像光學繞射元件(HOE)之膜片 式二原理’此傳統全像母片製作方式多用雷射光將 Iff*之ί幅、相位紀錄於鹵化銀底片或特定感光材料， 叱影、漂白等製程再重建繞射之光場，過程複雜 明麥考第—圖’圖中顯示此種3D立體技術需要兩張可 卡硬體7來搭配各自的lcd液晶面板5來做偏 声刀、與顯示處理’而輪出晝面必須是先經過特定軟體 面二碼成為立體影像專用的疊合影像晝面，最後此晝 古駚旦再經人眼配帶偏光眼鏡來觀賞就可產生真實的3D 立體影像。 、光切換造成之3D立體影像技術主要原理是：當 =:像由空間光線調製器(slm)或液晶面板(LCD)等輪 、 用人眼視覺暫留現象，極短時間的快速切換來控 200931121 制SLM或液晶面板切換 鏡片後使左眼與右眼看到象旦之f振光狀態’此時搭配偏振 由左右眼的視覺角度具有不同的偏振狀態，藉 顯示影像所需的視差現象，差 1大顯出’進而造成犯立體 釋成為-3D立體影像。^盤取後兩眼影像經大腦融合並解 用與改良，早期有類 ^型的立體影像技術有許多的應 ❹ ❹ 多台投影機產生之立體電^不而器(_)之犯技術等，與 有幾個特色，第-，使用！：=而此類型的3D _示器主要 二，輸出影像本身^、心片或兩片LCD來輸出影像。第 輸出之顯示等硬體; 片或偏振眼_賞。 —&立4像$要使用偏振 f fn學膜片纟3D立體影像技術的使用方式大致如下所 =D立㈣像技術#_到兩片重疊之LC 斤 像時，此兩片LCD需緊密地重A 丕目，丨；i出衫 會被模糊化城此受到*面起’否則兩者影像將 ,^ L 又引互面互相干擾而影響晝質清晰声 但=兩片LCD疊合緊密貼合—起使用時，由於兩片^ 的旦素(plxei)結構大小過於規律化， 近 :顧嚴重之光學干涉之疊紋(―現象，使= 質f抒涉條㈣嚴重谓，所赵的干涉條紋t 上為明亮相間的紋路，此條紋隨著觀察者的視角與= 之光線波段與兩料之液晶面板的錄的相對位置與 而有改變，有時產生的疊紋條紋#人的眼睛別二 不會輕易被發現其存在。 ’、、、’i別時就 一般而言，此疊紋將會嚴重影響液晶顯示的晝面品 7 200931121 質’是必須加以消除避免的重要問題。所以一般在先前技 藝中在此兩片LCD中間就必須加上一張特殊的光學膜片來 消除疊紋的問題，習知技術中是使用全像式光學膜片來降 - 低叠紋的影響，但是製作全像式膜片的技術門檻較高，不 易普及製作而且價格非常昂貴，且當使用的顯示器越來越 大時’就需要大面積的光學膜片。此類全像膜片母片製作 必須藉由雷射光源來做為全像術(Holography)干涉時的物 〇 光與參考光源，所製作的光學膜片面積越大則雷射光就必 須有更大的平行擴束光學裝置，牽涉到的光學專用擴束鏡 頭其體積也相當大’而透鏡之離軸像差也越大，故其均勺 性越難控制’所以相對其成本極高與製作困難。 个丨二如此，你八w價晚鐵的苗珩的叼司性住 ♦ 日§身士 、玄，FIR时 一 /、每身十 〇 功率明顯不足的問題下，直接會影響雷射曝光後的全 像膜片之表面結構體的成型率與分佈均勻性，就會大^ ，消除疊紋的效果與立體影像顯示的晝質，所“二 王像光學膜片大尺寸化，則未來使用此 、 寸就受到嚴重限制，而且全像類型之光;= ϋ 此全像光學膜片如果使用—般傳統顯示器ί 專用之下擴散片或上擴散片來取代時，會因也 使用隨機難做塗佈的製作方式 2散 :對稱視二 也有過大或過小的問題，使用此-般傳統之 8 200931121 嚴重造成畫素影像的模糊，輝度嚴重下降 像的顯示品質變差，且基本的聂 使3 d立體影 再者使用一般擴散膜 後因光線過度擴散其偏振狀態也廣散膜片 降，這都影響到3D立體影像的對比度與影像品下 輝度值。 * 口口貝和硯賞之 ❹ ❹ 因此，如何開發-種可以解決上述習知 點之光學膜片，能克服—般擴散片會使^的各種缺 持偏振，無法消除疊紋，光型為㈣_先天=無= 片也能克服傳統中大尺寸全像光學膜片 大面積化與價格非常昂貴的缺點，實為目前= 術中極為關鍵且極欲解決的課題。 正版衫像技 【發明内容】 於:= = :=’本發明之主要目的在 體，在A姑苴一/材 表面分別製作不同之結構 社構，i在料^面上製作一以部份弧型輪廊延伸之長條 ΐ槿，^ΐ表面上設置製作出微細之點狀凹凸的 ΐ形狀維度之條狀與凹凸點狀結構兩 所lw、表者之形狀曲率變化來改變 -己光角度分佈，可造成垂 t象的視角差異的光學特性二 膜片並Γ ΐ 有非對稱的配光特性。針對本發明之光學 、片，、上下表面之弧狀長條結構尺寸與點狀之凹凸結構尺 9 200931121 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（Spatial 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 豐LCD可能產生相近且近同調(coherent)之光程差（Optical 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 尔，提供一種用於消除疊紋干涉並控制視角之光學膜片， 其成形於基材的上下表面之不同微結構，其特徵在於··該 =材4以w *子之透光材質製成，上述成形於該基板的一 S之^構係為至少—種以弧形輪廓所延伸之長條微結 ’上述成形於該基板的另—表面之微結構係為 ❹Please refer to the first figure to show the architecture diagram of the traditional 3D stereo image using polarization switching technology. The concept in the figure shows that an optical film 6 needs to be placed between two pieces of lCD liquid and panel 5 to achieve polarization retention. Eliminate the appropriate architectural diagram that maintains the need for specific horizontal and vertical viewing angles. In the traditional technique, the production of such a diaphragm is currently based on the holographic interferometry. The previous technique of the genre is the holographic optical diffractive component disclosed in U.S. Patent No. 6,998,196. (HOE) diaphragm type two principle 'This traditional holographic master film production method uses laser light to record the thickness and phase of the Iff* on the silver halide film or the specific photosensitive material, and the process of shadowing, bleaching, etc. Light field, the process is complicated, Ming Mai Khao Di - Figure 'The picture shows that this 3D stereo technology requires two NIC hard bodies 7 to match the respective lcd LCD panel 5 for the partial oscillating knife, and the display processing' The surface must be a superimposed image surface that has been specially used for stereoscopic images through a specific software surface. Finally, this ancient 3D stereoscopic image can be produced by viewing the human eye with polarized glasses. The main principle of 3D stereoscopic image technology caused by light switching is: when =: like by spatial light modulator (slm) or liquid crystal panel (LCD), using human eye vision persistence phenomenon, very short time fast switching to control 200931121 After the SLM or the liquid crystal panel switches the lens, the left eye and the right eye see the f-vibration state of the image. At this time, the polarization is different from the visual angle of the left and right eyes, and the parallax phenomenon required for displaying the image is poor. It shows that 'there is a stereoscopic release into a -3D stereo image. ^ After the disk is taken, the two eyes are merged and solved and improved by the brain. There are many kinds of stereo image technology in the early stage. There are many applications for the stereoscopic image generated by multiple projectors. With a few features, the first -, use! := And this type of 3D _ display is mainly two, output image itself ^, heart piece or two pieces of LCD to output images. The display of the output is equal to the hardware; slice or polarization eye _ reward. —&立4像$To use the polarized f fn diaphragm 纟 3D stereoscopic image technology is roughly as follows = D vertical (four) image technology #_ to two overlapping LC jinogram, the two LCDs need to be tight The ground weight A is eye-catching, 丨; i-shirt will be blurred, the city will be *faced, otherwise the two images will be, ^ L and the mutual interference will affect each other and affect the enamel clear sound but = two LCD overlay Fitting - when used, because the size of the two pieces of plxei is too regular, near: the serious optical interference of the superficial ("phenomenon, make = quality f 条 ( (4) seriously said, Zhao The interference fringe t is a bright phase pattern which changes with the observer's angle of view and the relative light position of the light band and the liquid crystal panel of the two materials, sometimes resulting in a streak stripe #人The eyes of the eyes will not be easily found. ',,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Therefore, in the prior art, a special special must be added between the two LCDs. Optical film to eliminate the problem of moiré. In the prior art, the holographic optical film is used to reduce the effect of low-stacking, but the technical threshold for making the holographic diaphragm is high, it is not easy to popularize and the price is very high. Expensive, and when the display used is getting larger and larger, 'a large area of optical film is needed. This type of holographic film master must be made by laser light source as a matter of Holography interference. For the light and reference light source, the larger the area of the optical film produced, the larger the laser beam must have a larger parallel beam expanding optical device, and the optical special beam expanding lens involved is also quite large, and the off-axis image of the lens The difference is also greater, so the more difficult it is to control the 'so it is relatively high cost and difficult to make. 丨 二 二, you are the price of the night of the nursery of the 铁 性 ♦ 日 § § 、 、 At the time of FIR, if the power of each of the ten 〇 is obviously insufficient, it will directly affect the forming rate and distribution uniformity of the surface structure of the holographic film after laser exposure, which will greatly eliminate the embossing. The effect and the enamel of the stereoscopic image display, “The size of the two kings is larger, so the future use of this film is severely limited, and the holographic type of light;= ϋ This holographic optical film uses a conventional diffuser or When the upper diffuser is replaced, it will also be used because it is also difficult to do the coating. The symmetrical view 2 is also too large or too small. Using this traditional 8 200931121 seriously causes the blur of the pixel image and the brightness is severe. The display quality of the falling image is deteriorated, and the basic Nie makes the 3D stereoscopic image. After using the general diffusion film, the polarization state is also widely spread due to excessive light diffusion, which affects the contrast and image quality of the 3D stereoscopic image. The lower luminance value. * The mouth and the 砚 ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ ❹ 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学The light type is (4) _ congenital = no = film can also overcome the shortcomings of the traditional large-size holographic optical film large-area and very expensive, which is currently the key problem in the operation and extremely difficult to solve.Genuine shirt image technology [invention content] in: = = := 'The main purpose of the invention is to make a different structure structure on the surface of the A 苴 / / / material, i made a part on the material surface The strip-shaped porch extends the long strips, and the surface of the ΐ 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 制作 ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ The angular distribution, which can cause the difference in viewing angle of the vertical image, is that the two diaphragms have an asymmetric light distribution characteristic. For the optical, sheet, and upper and lower surfaces of the present invention, the arc-shaped strip structure size and the point-like uneven structure ruler 9 may cause optical interference in the pixel structure size of the two LCDs used in the 200931121 inch and 3D stereo images. The spatial frequency is used as the frequency avoidance of the interference spatial frequency to eliminate and reduce the phenomenon of the moiré interference at the lower frequency spatial frequencies of the beat frequency interference that the eye perceives. Therefore, the structure of the diaphragm can effectively destroy the 3D image display technology, and the use of two heavy-duty LCDs may produce similar and near-coherent optical path differences, which can be used to eliminate the problem of moiré. 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 after passing through the liquid crystal can be maintained, thereby avoiding the light leakage problem. In order to solve the above technical problems, according to one of the inventions, an optical film for eliminating moiré interference and controlling a viewing angle is provided, which is formed on different microstructures of upper and lower surfaces of a substrate, characterized in that The material 4 is made of a light-transmitting material of w*, and the above-mentioned structure formed on the substrate is at least a strip-shaped micro-junction extending in an arc-shaped profile, and the other is formed on the substrate. The microstructure of the surface is ❹
St:::::膜片係控制顯分佈使其 整體而言，本發明之光學獏片，能改 視角’並可以造成非傳統擴“ 象*处m除μ 重疊時產生的嚴重晶妨祖 象並此維持經過液晶後光線的 重宜、、文現 為了能他二 狀怨’避免漏光問題。 5月乡閱M下有關本發明之詳細說明與 200931121 附圖，相信本發明之目的..、特徵與特點， 並 非用來對本發明加以限制者。 ’ 【實施方式】 ❹ 〇 在本發明被詳細描述之前，要注音 内輯是以相同的編號 不僅疋示思，而非依照一定的比例繪圖。 附圖 再請配合㈣第二圖所*，其為本翻之 該光學膜片係控制光線視角分佈使其配二 分佈，並且該光學膜片的最大與最小之匕 =角度差異介於2度〜37度之間。本光學膜片本體包2 材h及上衣面結構2a與下表面結構3a， 土 至少-種社㈣魏形長賴加而赌構= t p 21a之表面形狀可由NURBS (非均勻有理B / =成’或由傳統光學所述及的球面，與非球面曲線、 NE (内插方式）曲線，或BEZffiR (皮埃爾曲線 ;方=寺組成之輪廓’如第二圖所示之曲線線 面曲甘錐曲線之部分輪廓曲線所構成之«非i 瓜形長條體仏可為由曲線線條輪廓 心製作。但為了更有效消_長條結構本身固定週期下: 又舆液晶面板產生之額外頻率之干涉條紋，亦吏 碗挺(如呈現反複類似S型振動之軌跡）的方式將曲線線條 11 200931121 輪廊211a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蜿挺之非球面微結構凸條體來降低此 干涉條紋之發生現象。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型蜿蜒狀之微結構弧形長條體21a，而 下表面結構3a則設置許多之點狀結構體31a。 再請參考第三圖所示，其為本發明之第二實施例，上 ❹表面結構2b包含至少一種類之微結構弧形長條體2ib，其 亦可设置相對於基材lb本體有一旋轉角度4b，即此微結構 弧形長條體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 來破5周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3lb 亦可改設置為凹狀結構體，或者使凹狀與凸狀點狀物同時 設置存在於下表面上。凹凸點狀物兩者差異主要在於凸狀 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 200931121 長短就有不同。此點狀結構體3ib之 ㈣(Etching)或以精密刀具採用壓花方、使用 加工或以喷塗顆粒等傳統方式製作出。第削 施中結構體本身類似部分隆起之小山丘或_^2未實 形狀矣而點狀結構體3lb的排列方式則為隨。ς =的 於下表面結構3b之上。 风日〕吟勺分佈 ❹ 社媸：再勺參！弟|五圖所示為本發明之第三實施例，上参S 、、·口構2c匕3至>、一種類之微結構弧形長條又面 由曲線線條輪廓2llc構成之加工刀具路徑^特定之直2 製作，並且此微結構弧形長條體2ic亦 了 1相對於基#le本體有_旋轉角度和。此微 長條體…亦可以改設置成為完全相 之 形長條差異在於兩者發散光線 異，這將會造成擴散角度與擴散距離的 些4不R。所述之微結構弧形長條體21e之形狀也可設置 成為完全相反之微結構卿凹狀長條，或者可使用多種不 同瓜狀之弧开v凹狀與弧形凸狀長條結構同時並存設置，根 據光學重疊(S—siticm)原理來製作好樣化的配光曲線 需求’改變微結構透鏡的等效前焦點與後焦點與基材ic的 材料與成型勝類之折射率，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 200931121 基丙烯酸甲酯(polymethylmethacrylate，PMMA)、聚碳酸酯 樹脂（Polycarbonate，PC)、甲基丙烯酸曱酯聚苯乙烯 (Methylmethacrylate Styrene，MS)及聚苯乙烯(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 ❹出（Extmsion)等製程製作’或使用熱壓(Emb〇ssing)或滾壓製 程(Roller to 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(2ia, 21b, 21c)之曲線 線條輪廓(211 a, 21 lb，211 c)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(21a，21b，21c)之寬度週期大小可從數十微米（μΐη)到 近百微米皆可，本發明案中的弧狀長條結構體(21a，21b，21c) 之結構寬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8〜90微米左右，實施例之較佳設 δ十值約在20〜60微米左右，而結構深度則可設計在3〜2〇微 米左右，本案之實施例三之結構較佳值約設計在3 5〜1〇5 微米之間，弧狀長條結構體(21a，21b，21c)之結構深度與寬 度比值約為〇.〇3〜2.5之間，而下表面結構(3a，3b，3c)設置之 點狀結構體(31a, 31b, 31c)其深度約在uo微米之間。須知 14 200931121 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 〇 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(0ptical Axis)旋轉軸對稱 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，3c) 設置點狀結構體(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，31c) ❹之深度大小約為1〜20 μ®，較佳值約為3〜9μιη。 一般而§，若以日本Nipp0n Denshoku社所製作販賣之 GC5000L擴散度㈣測量本翻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孕方向内之配料線，比較其最大與最小的^方向角度 之半功率全視角(厕腿），其歸·視角差異值應會大於 2度’但太大之FWHM視肖差異也會糾輝度過度下降與 晝質變模__，本發明之實關巾的最佳設計值約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 15 200931121 二，振f造成對比下降的問題。而值得一提的是本發明之 具’肖除疊紋奐改變視角之光學膜片之實際成品使用於兩 LCD面板之間時，兩上下結構面之方向可以任意調換使 •用’即本光學膜片上表面結構(2a, 2b, 2c)與下表面結構(3a， • %’t3:)置放於兩LCD面板中間使用時並無特定方向性，無 /頁才a疋上表面或下表面之結構方向何者須朝向觀察者。 清參閲第六圖所示，圖示為兩不同視角之配光曲線 ❹圖’說明本發明製作出的光學膜片之成品以日本Nippon Denshoku社所製作販賣之GC5000L擴散度儀所量測得的配 光曲線測量圖’該儀器測量方式是以近似平行之光源打入 待測之膜片結構後測量其各角度下的光學強度(Intensity)分 佈曲線。其中A曲線為本發明第二實施例製作出之光學膜 片，使用GC5000L擴散度儀器所量得的水平視角配光曲線 圖，而B曲線為本發明所量得的垂直視角配光曲線圖。第 六圖中水平軸之座標數值代表各視角之角度數值，垂直軸 之座標數值代表各視角角度下的相對光強度值。圖中顯示 本發明之光學膜片可使垂直方向與水平方向的半高全寬角 度(Full Width Half Maximum，FWHM)視角分佈有一定差 異，故有其視角具有不對稱的光學特性，即視角角度具異 向性(Anisotropic)，其擴散特性與配光曲線分佈和一般擴散 膜片完全不同。 請參考附件一所示，其顯示一 3D立體顯示器其内部設 置有兩重疊之LCD液晶面板，此時兩片LCD面板之間不 加任何光學膜片或擴散膜片，當點亮此3D顯示器後給予全 16 200931121 白晝面讯號，並拍攝此時面板上的影像，由附件—可見此 =相同LCD φ板上的晝素鶴干涉造成之疊紋現象，圖 的^垂直方向與水平方向的疊紋干涉紋路嚴重影響畫面 立附件二所示，其為加上一般傳統擴散膜後的 Ο ❹ 重，仍嚴重干擾^視覺效果’顯示疊故干涉仍然嚴 除疊紋問題。息面品質，顯示傳統擴散膜片無法有效消 清參考附件：Τ Μ — 膜片後，拍攝’其顯示使用前案之傳統全像光學 但仍有些微疊料^果’其疊紋問題已獲得明顯控制’ 請i考附件2產生之亮暗相間的紋路。 干涉與控财變視2,其為僅加上本發日狀具、;肖除4紋 件四顯示本發明之t光學膜片的模組視覺拍攝效果’附 而疊紋的胁效果ir膜片的確能有效消除疊紋的問題， 至於實際㈣之全像光賴片更為優秀。 碼的犯顯示軟體t影像的觀察必須搭配經影像處理編 效果，I法於圖m、又顯不輸出之硬體及偏光眼鏡來觀察 是無法達成，但是以傳統擴散膜的設計原理 像的景深與立體與控制，所以無法將3D立體影 模糊和過度擴散造表現出來’且會有影像1 光，降低對比愈佥hi保持偏振狀態，將造成LCD漏 惟，以上;C題： 詳細說明與圖式，惟^翻最佳之—的具體貫把例之 本發明之特徵並不侷限於此，ϋ非用 200931121 以限制本發明，本發明之所有範圍應以下述之申請專利範 圍為準，凡合於本發明申請專利範圍之精神與其類似變化 之實施例，皆應包含於本發明之範疇中，任何熟悉該項技 藝者在本發明之領域内，可輕易思及之變化或修飾皆可涵 . 蓋在以下本案之專利範圍。 【圖式簡單說明】 φ 第一圖係習知之3D立體顯示技術之關係架構圖。 第二圖係本發明之第一實施例之立體結構圖。 第三圖係本發明之第二實施例之正面立體結構圖。 第四圖係本發明之第二實施例之反面立體結構圖。 第五圖係本發明之第三實施例之立體結構圖。 第六圖係為一曲線圖，說明本發明之第二實施例中膜片所 測得之視角配光曲線圖。 附件一係為不加任何擴散膜片的3D立體顯示器實際拍攝 之視覺效果。 ® 附件二係為加上一般傳統擴散膜片的3D立體顯示器實際 拍攝之視覺效果。 附件三係為加上傳統全像光學膜片的3D立體顯示器實際 拍攝之視覺效果。 附件四係為加上本發明光學膜片的3D立體顯示器實際拍 攝之視覺效果。 【主要元件符號說明】 18 200931121The St::::: diaphragm system controls the apparent distribution. As a whole, the optical cymbal of the present invention can change the viewing angle 'and can cause non-traditional expansion. In this way, the light of the liquid after the liquid crystal is maintained, and the text is now in order to be able to blame him for avoiding the problem of light leakage. The detailed description of the present invention and the 200931121 drawing are taken from May. The features and characteristics are not intended to limit the invention. 'Embodiment ❹ 之前 〇 Before the present invention is described in detail, the phonetic internal series is not limited to a certain scale, but not drawn according to a certain scale. Please refer to the figure (4) in the second figure, which is based on the control of the optical viewing angle distribution of the optical film system to match the distribution of the optical film, and the maximum and minimum 匕 = angle difference of the optical film is between 2 Between ~37 degrees. The optical film body package 2 material h and the upper surface structure 2a and the lower surface structure 3a, the soil at least - the species (four) Wei-shaped long Laijia and gambling = tp 21a surface shape can be NURBS ( Non-uniform rational B / = into ' or by traditional light Learn the spherical surface, the aspheric curve, the NE (interpolation) curve, or the BEZffiR (the Pierre curve; the contour of the square = temple) as shown in the second figure. The part of the contour curve consists of a non-i-shaped melon-shaped strip body that can be made from the curved line contour. However, in order to be more effective, the strip structure itself has a fixed period: and the interference fringe of the extra frequency generated by the liquid crystal panel is Also, the bowl is quite flat (such as showing a trajectory similar to the S-type vibration). The curve line 11 200931121 The porch 211a is extended along a specific curve (such as a trajectory resembling an s-type vibration). Spherical microstructured ribs reduce the occurrence of this interference fringe. The actual processing of the strip or braid can be characterized by ultra-precision machining tools and computer numerically controlled processing machines. The microstructured arc-shaped elongated body 21a of the shape or the s-shaped shape, and the lower surface structure 3a is provided with a plurality of the dot-shaped structural bodies 31a. Referring to the third figure, it is the second embodiment of the present invention. Upper jaw surface knot 2b comprises at least one type of microstructured curved strip 2ib, which may also be provided with a rotation angle 4b with respect to the substrate lb body, that is, the strip extending direction of the microstructured elongated strip 21b does not need to be parallel or vertical It is disposed on the substrate lb body. The advantage of designing the rotation angle 4b is that it can be used to break the viewing angle distribution of the optical film for 5 weeks and adjust the horizontal and vertical component specific gravity of the spatial frequency of the diaphragm itself, because of various sizes. The size of the LCD liquid crystal display is somewhat different depending on the manufacturer, and the viewing angle of the light distribution can be finely changed by the rotation angle 4b. The microstructured curved strip 21b can be curved by the curved line contour. The machining tool path formed by 211b is stretched and formed in a specific linear direction. Referring to the fourth figure, which is a dot structure 31b provided on the lower surface of the optical film of the second embodiment of the present invention, the figure shows a structure in which the lower surface structure 3b is provided with a plurality of raised dot structures. 31b, the dot structure 3lb may be modified to be a concave structure, or the concave and convex dots may be simultaneously disposed on the lower surface. The difference between the bumps and the dots is mainly due to the fact that the convex and concave dots are in the microlens imaging theory, and the equivalent front and back focal lengths of the lenses are different, and the distance between the spatial position and the diffusion required for the diffused light is 12 200931121 The length is different. Etching of the point structure 3ib is performed by conventional methods such as embossing, machining, or spraying particles with precision tools. In the first embodiment, the structure itself is similar to a partially raised hill or _^2 is not a solid shape, and the arrangement of the dot structure 3lb is followed. ς = is above the lower surface structure 3b. Windy day] distribution of spoons ❹ Community: again spoon! The fifth figure shows a third embodiment of the present invention, the upper reference S, the mouth structure 2c匕3 to >, one type of microstructured curved strip and the processing tool composed of the curved line contour 2llc The path ^ is made in a straight line 2, and the microstructured arcuate strip 2ic also has a _rotation angle sum with respect to the base #le body. This micro strip can also be set to be completely phased. The difference between the strips is that the divergence of the two is different, which will cause the diffusion angle and the diffusion distance to be 4 not R. The shape of the microstructured arcuate strip 21e may also be set to be a completely opposite micro-structured concave strip, or a plurality of different melon-shaped arc-opening v-concave and curved convex strip-shaped structures may be used simultaneously. Coexisting settings, according to the principle of optical overlap (S-siticm) to make a good definition of the light distribution curve 'change the equivalent front focus of the microstructure lens and the back focus and the substrate ic material and the refractive index of the forming class, will Affects the angle of diffusion of light through the optical film and the distance of diffusion. 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. The polymer light-transmitting material is selected from the group consisting of polymethyl 13 200931121-based methyl acrylate ( Polymethylmethacrylate, PMMA), Polycarbonate (PC), Methylmethacrylate Styrene (MS), Polystyrene (PS) or Saturated Polyester (PET) Any one of the materials in the group, and the optical film having the anti-aliasing and control angle of view in the present invention is prepared by the optically designed structure being processed by the precision mold and then cured by ultraviolet light (UV) curing. The process can be produced by using a process such as Extmsion or by using an Embssing or Roller to Roller to mass produce the film of the present invention. In the above embodiment, the curved line profile (211 a, 21 lb, 211 c) of the elongated microstructure (2ia, 21b, 21c) may be composed of at least one line unit. Of course, it may be an aspherical line or a straight line. Different lines such as NURBS curve, SPLINE curve, BEZIER curve and arc line are combined with each other, and the curve is extended to form a Compound Asphere Surface. The aspherical shape of the curved arcuate strips (21a, 21b, 21c) may have a width period ranging from several tens of micrometers (μΐη) to nearly one hundred micrometers, and the arcuate elongated structure in the present invention ( The structural width of 21a, 21b, 21c) is estimated to be about 8 to 90 microns due to the size limitation of the precision machining tool and the resolution of the eye. The preferred embodiment has a delta value of about 20 to 60 microns. The left and right, and the depth of the structure can be designed to be about 3~2〇 microns. The structure of the third embodiment of the present invention is preferably designed to be between 3 5~1〇5 microns, and the arc-shaped strip structure (21a, 21b, 21c) has a structure depth to width ratio of about 〇.3 to 2.5, and the lower surface structure (3a, 3b, 3c) has a dot structure (31a, 31b, 31c) having a depth of about uo micron. between. Notice 14 200931121 The size and shape of the structure design of the upper and lower surfaces will vary with the relative conditions of the two LCD's pixel size and viewing angle requirements. Therefore, there is a method for designing the upper and lower surface structures of the optical film which can eliminate the moiré and change the viewing angle, and the aspherical equation is matched with the optical design program to optimize the aspheric microstructure on the surface, and the structural shape is utilized. The change in the radius of curvature and the change in the aspherical coefficient and the difference in optical refractive index between the diaphragm substrate and the structure control the angular ratio of the diffused light to be large and small. Since the upper surface structure (2a, 2b, 2c) is provided in the shape of a long arc-shaped columnar body, and the non-general lens is rotationally axisymmetric to the optical axis (0ptical Axis), the diaphragm of the present invention is horizontal. There will be significant differences from the vertical viewing angle distribution. And a dot structure (31a, 31b, 31c) is disposed on the lower surface structure (3a, 3b, 3c) of the optical film, and the structure may be a protrusion or a concave shape, a concave or convex structure and a size thereof Depth will affect the viewing angle of the light. In general, the smaller the radius of curvature or the deeper the depth of the point structure, the larger the diffusion angle, and the depth of the point-like structure (31a, 31b, 31c) having an uneven shape is about 1 to 20 μ. ®, preferably from about 3 to 9 μm. In general, §, if the GC5000L diffusion degree (4) produced by Japan Nipp0n Denshoku Co., Ltd. is used to measure all the median angles of the optical film (similar to the longitude angle of the longitude and longitude of the Earth's latitude and longitude), measure the positive and negative 90 pregnancy directions. The ingredient line, comparing the maximum and minimum angles of the half direction of the power angle (the toilet leg), the difference between the angle of view and the angle of view should be greater than 2 degrees 'but too large FWHM difference will also reduce the degree of correction昼 变 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ It is worth mentioning that when the actual finished product of the optical film with the change angle of view of the present invention is used between two LCD panels, the directions of the two upper and lower structural faces can be arbitrarily changed to enable the use of the optical The upper surface structure (2a, 2b, 2c) and the lower surface structure (3a, • %'t3:) are placed in the middle of the two LCD panels without specific directionality, and no/page is a top or bottom surface. The structural direction of the surface must be directed toward the observer. As shown in the sixth figure, the light distribution curve of the two different viewing angles is shown in the figure. The finished product of the optical film produced by the present invention is measured by the GC5000L diffusometer manufactured by Nippon Denshoku Co., Ltd., Japan. The measurement curve of the light distribution curve's measuring method is to measure the optical intensity (Intensity) distribution curve at various angles after the film structure to be tested is driven into an approximately parallel light source. The A curve is the optical film produced by the second embodiment of the present invention, and the horizontal viewing angle light distribution curve measured by the GC5000L diffusivity instrument is used, and the B curve is the vertical viewing angle light distribution curve measured by the invention. The coordinate values of the horizontal axis in Fig. 6 represent the angle values of the respective viewing angles, and the coordinate values of the vertical axis represent the relative light intensity values at the respective viewing angles. The optical film of the present invention is shown in the present invention. The viewing angle of the Full Width Half Maximum (FWHM) of the vertical direction and the horizontal direction is different, so that the viewing angle has an asymmetrical optical characteristic, that is, the viewing angle is different. Anisotropic, its diffusion characteristics are completely different from those of the general diffusion film. Please refer to Appendix I, which shows a 3D stereo display with two overlapping LCD liquid crystal panels. No optical film or diffusion film is added between the two LCD panels. When the 3D display is lit, Give the full 16 200931121 white 昼 surface signal, and shoot the image on the panel at this time, from the attachment - this = the same pattern on the same LCD φ board caused by the interference of the 昼 plain crane interference, the vertical and horizontal stack of the figure The grain interference pattern seriously affects the screen as shown in Attachment 2, which is the weight of the conventional diffusion film, which still seriously interferes with the visual effect. The quality of the surface shows that the traditional diffusion film can not effectively clear the reference accessories: Τ Μ — After the film, the film 'the traditional holographic optical image showing the use case before, but still some micro-stacks ^ fruit' has been obtained Obvious control 'Please check the bright and dark lines created by Attachment 2. Interference and control of financial change 2, which is only added to the hairpin, and the fourth image of the optical film of the present invention shows the visual effect of the module of the t-optical film of the present invention. The film can effectively eliminate the problem of the embossing. As for the actual (4) hologram, the film is better. The code of the code shows that the observation of the soft t image must be matched with the image processing effect. The I method is not possible to achieve the observation of the hardware and polarized glasses of the figure m and the output, but the depth of field is the design principle of the traditional diffusion film. With stereo and control, it is impossible to make 3D stereoscopic blur and excessive diffusion to create 'and there will be image 1 light, reduce the contrast and keep the polarization state, which will cause LCD leakage, above; C title: Detailed description and diagram The present invention is not limited thereto, and is not intended to limit the invention, and all the scope of the invention should be determined by the following claims. The spirit of the scope of the present invention and its similar variations are intended to be included in the scope of the present invention, and any person skilled in the art can easily recognize changes or modifications in the field of the present invention. Cover the scope of the patent in this case below. [Simple description of the diagram] φ The first diagram is a relational architecture diagram of the conventional 3D stereoscopic display technology. The second drawing is a perspective structural view of the first embodiment of the present invention. The third drawing is a front perspective view of a second embodiment of the present invention. The fourth drawing is a reverse perspective view of a second embodiment of the present invention. The fifth drawing is a perspective structural view of a third embodiment of the present invention. Fig. 6 is a graph showing a viewing angle distribution curve measured by a diaphragm in the second embodiment of the present invention. Attachment 1 is the visual effect of the actual shooting of a 3D stereoscopic display without any diffusion diaphragm. ® Annex 2 is the actual visual effect of a 3D stereoscopic display with a conventional diffuse diaphragm. Attachment 3 is the visual effect of the actual shooting of a 3D stereoscopic display with a conventional holographic optical film. Annex 4 is the visual effect of the actual shooting of the 3D stereoscopic display incorporating the optical film of the present invention. [Main component symbol description] 18 200931121
[習知] LCD液晶面板 光學膜片 顯示卡硬體 [本發明] 基材 上表面結構 微結構弧形長條體 曲線線條輪廊 下表面結構 點狀結構體 旋轉角度 A曲線 B曲線 5 6 7[Invention] LCD liquid crystal panel Optical film Display card hardware [Invention] Substrate Upper surface structure Microstructure curved strip body Curve line wheel corridor Lower surface structure Point structure Rotating angle A curve B curve 5 6 7
la, lb, lc 2a, 2b，2c 21a, 21b, 21c 211a, 211b, 211c 3a, 3b, 3c 31a, 31b, 31c 4b, 4c A B 19La, lb, lc 2a, 2b, 2c 21a, 21b, 21c 211a, 211b, 211c 3a, 3b, 3c 31a, 31b, 31c 4b, 4c A B 19