201100873 六、發明說明： 【發明所屬之技術領域】 本發明係有關光_，尤其於液晶顯示界⑽ _id C神i Display)之背光系統或其它需要之具有複 數稜鏡柱結構的光學膜者。 【先前技術】 請參閱圖1所示。-般液晶顯示器之背光系統，包括冷陰 極燈管（CCFL)ll、導光板（LGPM2、下擴散片 diffuser)13、聚光片（prism sheet)14、上擴散片（丁叩 diffuser)15 及反射板(Refiect〇r)i6 所組成。 請參閱圖2所示。習知聚光片14係由複數個縱向平行排 列的三角形冬稜鏡柱(Prism rod)141及基材（Substrate)i42 所組成。稜鏡柱141結合於基材142的一側邊。每—菱鏡柱 141的高度、寬度相同，且稜鏡柱141的稜線高度不變，走向 為直線，稜線兩側的斜面相對稱。 請參閱圖3所示。聚光片14之光學路徑模式有三種： 1. 全反射回收（TRI Recycle): 光線143由稜鏡柱141内約在垂直稜鏡柱141底面之虛擬 垂直軸140的± 4°内射入時’受棱鏡斜面柱14ι的全反射現 象之影響，經兩次全反射後’回收至背後光源方向，繼續擴散 傳播利用； 2. 二次折射回收（2nd Reflection Recycle): 3 201100873 光線144經由兩組稜鏡桂“I的折射後，再回收至背後 光源方向’繼續擴散傳播利用；及 3.直接折射(Directed Refiective): 光線145經由棱鏡柱141的斜面折射出，此光路模式有集 中光線之作用；如圖3中所示，由梭鏡柱141的視角80·範 圍内折射出的光線才有利用價值。 請參閱圖4所示。上述具有複數縱肖平行規律排列的稜鏡 Ο 才主141的聚光片14，當其上方疊置-上擴散片15或另-聚光 片等上層材料膜時，會產生如下問題： 1.谷易發生光色散的現象。 . 2.容易發生疊紋的現象。 3.务、光片14與上層的上擴散片15之間會有祕的問題。 4’聚光片14與上擴散片15沾㈣區域151，在大視角觀察時 有白斑的現象。 〇 5.聚光# 14於沾㈣區域151的峰(Peak)直接與上擴散片15 等上層材料膜接觸容易刮傷上層材料膜。 美國專利第5,919,551號所揭示-觀化間距結構的光 學膜（Variable pitch structured 〇如如 fiw，包含至少 -個相鄰稜鏡柱之間具有第—種相距(恤此⑻的第一 . 組稜鏡柱’及第二組稜鏡柱；第—組稜鏡柱的峰間距不同於第 ^稜鏡㈣峰間距，以減少莫爾干涉條紋⑽re 201100873 interference patterns)的能見度。 【發明内容】 為了使光學膜具有新的結構，減少光學膜與其他材料膜 相疊時容易發生光色散及疊紋的現象’而提出本發明。 本發明的主要目的’在提供一種具有表面結構的光學 膜’可減少光辅與其他材觸相射發生光色散的現象。 本發明的另-目的，在提供一種具有表面結構的光學201100873 VI. Description of the Invention: [Technical Field] The present invention relates to a backlight system for light, especially for a liquid crystal display (10) _id C display, or other optical film having a multi-column structure. [Prior Art] Please refer to Figure 1. The backlight system of the general liquid crystal display includes a cold cathode fluorescent lamp (CCFL) 11, a light guide plate (LGPM2, a lower diffuser diffuser) 13, a prism sheet 14, an upper diffuser (diffuser) 15 and a reflection The plate (Refiect〇r) i6 is composed. Please refer to Figure 2. The conventional concentrating sheet 14 is composed of a plurality of longitudinally parallel triangular prism rods 141 and a substrate (Substrate) i42. The mast 141 is bonded to one side of the substrate 142. The height and width of each of the prism columns 141 are the same, and the height of the ridge line of the mast 141 is constant, the direction is a straight line, and the slopes on both sides of the ridge line are symmetrical. Please refer to Figure 3. There are three optical path modes of the concentrating sheet 14: 1. TRI Recycle: The ray 143 is incident on the inside of the mast 141 within ± 4° of the virtual vertical axis 140 on the bottom surface of the vertical mast 141. 'Because of the total reflection phenomenon of the prism inclined column 14ι, after two total reflections, 'recovered to the direction of the back light source, continue to spread and utilize; 2. 2nd Reflection Recycle: 3 201100873 Light 144 through two groups稜鏡桂 "I refracted, then recycled to the direction of the back light source" continues to spread and utilize; and 3. Directed Refiective: Light 145 is refracted through the slope of prism column 141, this light path mode has the effect of concentrated light As shown in Fig. 3, the light refracted by the angle of view 80· of the hook column 141 is of value. Please refer to Fig. 4. The above-mentioned 具有 主 141 with multiple vertical parallel parallels When the concentrating sheet 14 is superposed on the upper material film such as the upper diffusion sheet 15 or the other condensing sheet, the following problems occur: 1. The phenomenon of light dispersion occurs in the valley. 2. Prone to occurrence of embossing Phenomenon. There is a problem between the light sheet 14 and the upper upper diffusion sheet 15. The 4' concentrating sheet 14 and the upper diffusion sheet 15 are immersed in the (4) region 151, and there is a phenomenon of white spots when viewed from a large viewing angle. 〇5.聚光# The peak of the smear (4) region 151 is directly in contact with the upper material film such as the upper diffusion sheet 15 to easily scratch the upper material film. The optical film of the spacer structure is disclosed in U.S. Patent No. 5,919,551. For example, fiw, including at least one adjacent column, has the first type of spacing (the first group of the group (8) and the second group of columns; the peak spacing of the first group of columns is different In the fourth (four) peak spacing, to reduce the visibility of the moire interference fringes (10) re 201100873 interference patterns. [Summary of the invention] In order to make the optical film have a new structure, it is easy to occur when the optical film overlaps with other material films. And the present invention. The main object of the present invention is to provide an optical film having a surface structure which can reduce the phenomenon of light dispersion caused by photo-assisted and other materials. Provided Kinds of optical surface structure having
膜，可減少光學膜與其讀簡相疊時發生疊紋的現象。 本發明的另-目的，在提供一種具有表面結構的光學 膜’可減少光學膜與其他材料膜相疊時產生邮的問題。 本發明的又一目的’在提供一種具有表面結構的光學The film can reduce the occurrence of moiré when the optical film overlaps with its reading. Another object of the present invention is to provide an optical film having a surface structure which can reduce the problem of mail generation when an optical film is overlapped with other material films. A further object of the invention is to provide an optical having a surface structure
膜，可減少光學膜其他材料臈相疊時的沾_域，在大角度 觀察時產生白斑的現象。 X 膜 本發明的又一目的，在提供一種具有表面結構的光學 了減/、光學膜刮傷上層材料膜纟 含聚織增觸㈣mr增加包 他材===?;’係_少光學膜與其 該基材的—表面包含有複數縱二 等相鄰的峰之間分別且有穴 于刀1、有峄，忒 間距;爾分別具二;角= 特徽在於等谷分別具有谷底角，·其 、 该麵控制元件的峰的高度呈週期性的變化；可 5 201100873 有效減少兩相疊光學膜的光色散現象，並可減少疊紋發生的 機會。 本發明的其他目的、功效’請參關式及實施例，詳細說明如 下。 【實施方式】 明參閱圖5所示。本發明具有表面結構的光學膜，係用 以減少光學麟其他材料翻㈣發生光色散及 疊紋的現象 〇 者。本發明帛一實施例之具有表面結構的光學膜30，包括： 基材31，可供光線穿射通過。基材31的一表面包含有複數 ，縱向接近平行排列的光控制元件，例如棱鏡柱32、33、34、 • 35 ’各倾鏡柱32、33、3m別具有兩個斜面形成-個 獨立的峰(peak)32卜33卜341、351;相鄰的兩個峰321、33卜 341、351之間的兩斜面分別形成獨立的谷(VaUey)36、3?、 38 ’每個峰321、33卜34卜351分別具有峰高322、332、342、 ❹ 352 ’相鄰的谷36、37、38之間分別具有谷間距36卜37卜 本實施例光學膜30的特徵在於：每個峰32卜33卜如、 351的峰頂角（j^hedrai arigle)與每個谷％、37、38的谷底 角均相等；複數個峰32卜33卜34卜351的峰高微、微、_ 342 352的局度呈週期性的變化，例如呈弦波式變化，如圖中 連接各峰的虛線所示者；且複數個谷36、37、38之間的谷間 距36卜371隨峰高的變化呈等比變化。 树關絲膜3〇 __鏡_峰高之關高度差在 6 201100873 5um (微米）至lum之間；最高的峰高的高度為最低的峰高的 鬲度的1.2倍至1.05倍之間；每一次峰高的高度變化週期約 包含40〜400個峰；峰頂角的夾角範圍為7〇度至11〇度之間。 本實施例光學膜30的相鄰兩稜鏡柱的谷間距約在52um至48⑽ 之間。本實施例的峰頂角可為圓弧角，如圖8所示光學膜 的各光控制元件52的峰521呈圓弧狀者。 當光學膜30與其他的光學膜互相堆叠時，由於光學膜3〇 〇 的稜鏡柱32、33、34、35的峰高322、332、342、352的高度 及谷間距36卜371呈週期性的變化，使由光學膜3〇的上方射 出的光線呈不規則的變化，較不會產生光色散及疊紋的現象； 且由於光學膜30的稜鏡柱32、33、34、35的峰高322、332、 342、352的高度呈週期性的變化，呈: 光學膜40的上端堆疊另一光學膜時， 觸少數凸出的光控制元件的峰，如圖5中稜鏡柱32的峰321， 而不會接觸較凹陷的稜鏡柱34、35的峰如、351 ;因此可大 幅減少光學膜30與其上端的光學關接觸面積，可有效減少 與上層光學膜之間的沾枯問題，並可減少沾祕域在大自㈣The film can reduce the smear field when other materials of the optical film are stacked, and white spots appear when viewed at a large angle. X-films Another object of the present invention is to provide an optical reduction with an surface structure, an optical film scratching of an upper material film, a poly-woven contact, a (4) mr increase, and a material ===?; The surface of the substrate comprises a plurality of longitudinally adjacent peaks and a hole between the knives 1, the ridges and the ridges, respectively; the erection has two; the angle = the special emblem is that the valleys respectively have a valley angle, The height of the peak of the surface control element changes periodically; 5 201100873 effectively reduces the light dispersion of the two-phase laminated optical film and reduces the chance of occurrence of moiré. Other objects and effects of the present invention will be described in detail in the following description. [Embodiment] See Fig. 5 for details. The optical film having the surface structure of the present invention is used to reduce the occurrence of light dispersion and moiré in other materials of the optical lining. The optical film 30 having a surface structure according to an embodiment of the present invention comprises: a substrate 31 through which light can pass therethrough. A surface of the substrate 31 comprises a plurality of light control elements arranged in a longitudinally close to the parallel direction. For example, the prism columns 32, 33, 34, 35' each of the tilting mirror columns 32, 33, 3m have two inclined faces formed independently. Peak 32 32 33 341, 351; the two slopes between the adjacent two peaks 321 , 33 341 , 351 form independent valleys (VaUey) 36, 3?, 38 'each peak 321 33 Bu 34 351 respectively have peak heights 322, 332, 342, ❹ 352 'The valleys 36, 37, 38 adjacent to each other have valley spacing 36, respectively. The optical film 30 of the present embodiment is characterized by: each peak The peak angle (j^hedrai arigle) of 32, 33, and 351 is equal to the valley angle of each valley, 37, and 38; the peaks of multiple peaks 32, 33, 34, and 351 are slightly higher, micro, and _ The degree of 342 352 changes periodically, for example, as a sinusoidal change, as shown by the dotted line connecting the peaks in the figure; and the valley spacing between the plurality of valleys 36, 37, and 38 is 736. The change is proportional. The tree height of the tree is 3 __ mirror _ peak height difference between 6 201100873 5um (micron) to lum; the highest peak height is between 1.2 times and 1.05 times the lowest peak height The height change period of each peak height includes about 40 to 400 peaks; the angle of the peak angle ranges from 7 to 11 degrees. The valley spacing of adjacent columns of the optical film 30 of this embodiment is between about 52 um and 48 (10). The peak angle of the present embodiment may be an arcuate angle, and as shown in Fig. 8, the peaks 521 of the respective light control elements 52 of the optical film are arcuate. When the optical film 30 and the other optical films are stacked on each other, the heights of the peak heights 322, 332, 342, and 352 of the optical films 3, 32, 33, 34, and 352 and the valley pitch are 371. The change of the property causes the light emitted from above the optical film 3 to be irregularly changed, and the phenomenon of light dispersion and moiré is less generated; and due to the masts 32, 33, 34, 35 of the optical film 30 The heights of the peak heights 322, 332, 342, and 352 are periodically changed. When the upper end of the optical film 40 is stacked with another optical film, a peak of a few protruding light control elements is touched, as shown in FIG. The peak 321 does not contact the peaks of the more concave masts 34, 35 such as 351; therefore, the optical contact area between the optical film 30 and the upper end thereof can be greatly reduced, and the adhesion to the upper optical film can be effectively reduced. Problems, and can reduce the secret domain in the big self (four)
43、44、45 ;各個稜鏡柱 呈如弦波式變化的設計，當 ί ’另一光學膜的底邊只接 201100873 42 43、44、45分別具有兩個斜面形成一個獨立的峰似側、 仞、451 ;相鄰的兩個峰似、伽、侦、451之間的兩斜面 为別形成獨立的谷46、47、你；每個峰42卜43卜44卜451 的峰頂角均相等。本發明第二實施例的纖4〇盎前述第一 實施例的光學膜30相同，每個峰仞、431、侦、451的高产 呈週期性的變化，如财連接各峰的虛線所示者；但本實施: 的峰42卜43卜44卜451的高度呈如鐘擺狀週期性的變化，43, 44, 45; each mast is designed like a sinusoidal change, when ί 'the bottom edge of another optical film is only connected to 201100873 42 43 , 44 , 45 respectively have two slopes to form an independent peak like side , 仞, 451; the two slopes between the two adjacent peaks, gamma, Detect, and 451 are independent valleys 46, 47, and you; the peak angles of each peak 42 b 43 44 44 451 equal. The optical fiber 30 of the second embodiment of the present invention is the same as the optical film 30 of the first embodiment, and the high yield of each peak, 431, Detect, and 451 is periodically changed, as shown by the dotted line of each peak of the financial connection. However, this implementation: The height of the peak 42 b 43 44 44 451 changes periodically like a pendulum.
即母個峰42卜43卜44卜451的兩斜面之中分線似、4犯、 42 452 έ Mi置不同成鐘擺狀週期性的左右傾斜，谷、 47、48的夾角也隨位置不同而改變。 如圖6、7所示，每一個峰421、43 W4卜451的兩斜面 之中分線422、432、442、452呈鐘擺狀週期性左右傾斜的狀 態，係如-擺長為最高的峰的高度Lr的鐘擺，其一端以特定中 心C為軸，其另—端週期性的向左右兩側懸擺而呈傾斜的狀 態’故每個峰與最高的峰的高度差^，隨射分線422、432、 、452虹鐘擺狀週期性左右傾斜，而產生週期性的變化。 母個峰與最高的峰的高度差hd的值可由下式獲得： hd = Lr(l-cos θ), 其中，L·為最高的峰的高度值；θ為峰的偏擺角度。 本實施例光學削0的任_她崎 大於0.5度至Μ5度之間；每—鶴㈣^ I產吳不 15度至H ;每—姆祕^^端則度不大於 母人蜂间的间度變化週期約包含4(Μ〇〇 201100873 本實施例的 個峰’峰頂角的炎角範圍為70度至no度之間 峰頂角可為圓弧角。 本實施例的光學膜40的峰421、431、441、451的高产 呈如鐘擺狀週期性的變化，每個峰421、431、zui 1 ' 441、451 的兩That is, the two peaks of the mother peak 42 Bu 43 Bu 44 451 are divided into four lines, four crimes, 42 452 έ Mi are placed in different pendulum periodic left and right inclinations, and the angles of valleys, 47, 48 are also different depending on the position. change. As shown in FIGS. 6 and 7, the split lines 422, 432, 442, and 452 of the two slopes of each of the peaks 421, 43 W4 and 451 are in a pendulum-like periodic state, and are inclined to the highest peak. The pendulum of the height Lr has one end with a specific center C as its axis, and the other end periodically slanting to the left and right sides and is inclined. Therefore, the height difference between each peak and the highest peak ^, with the shot The lines 422, 432, and 452 are periodically tilted left and right to produce periodic changes. The height difference hd of the mother peak and the highest peak is obtained by the following equation: hd = Lr(l-cos θ), where L· is the height value of the highest peak; θ is the yaw angle of the peak. In this embodiment, the optical cut 0 is greater than 0.5 degrees to Μ 5 degrees; each - crane (four) ^ I produces Wu not 15 degrees to H; each - 姆 ^ ^ ^ end is not greater than the female bee The interval of the degree of variation includes about 4 (Μ〇〇201100873, the peak of the peak of the embodiment), and the range of the apex angle of the peak is from 70 degrees to no. The peak angle of the peak may be an arc angle. The optical film 40 of this embodiment. The high yields of the peaks 421, 431, 441, and 451 are periodically changed like a pendulum, and each of the peaks 421, 431, zui 1 ' 441, 451
斜面之中分線422、432、442、452會隨位置不同成鐘擺狀週 期性的左右傾斜，谷46、47、48的夾角也隨位置不同而改變， 因此當光學膜4G與其他的光軸互姆料，财會產生光 色散及疊紋的現象；結於光學膜4Q的稜鏡柱42、θ43 45的峰高422、432、442、452的高度呈週期性的變化，呈如 鐘擺狀週期性的變化，當光學膜40的上端堆疊另一光學膜 時’另-光學膜的底邊只翻少數凸出的光控制元件的學， 如圖6中稜鍊柱42的峰421，而不會接觸較凹陷的棱鏡柱4心 45的峰441、451 ;因此可大幅減少光學膜4〇與其上端的光 學膜的接觸面積’可有效減少與上層光學膜之間的沾枯.問 題，並可減少祕區域在大肖度贿時有自㈣現象，並可 減少稜鏡㈣峰與上層光箱直接接_觸上層光學膜的 機率’有助於增加產品製造的良率。 本發明兩相鄰稜鏡柱之間的峰的高度呈週期性的變化及 谷間距呈相對應的變化，及各光控制元件的峰為圓弧狀之 «•又十均有別於上述美國專利所揭示之光學膜。本發明使光學膜 峰的高度呈週期性的變化及谷間距呈相對應的變化的結構，可 有效減少兩相疊光學膜的光色散現象，並可減少疊紋發生的機 會’且利用光學膜的複數稜鏡柱上端的峰的高度呈週期性的變 9 201100873 化’可減少光學膜支撐於上層材料膜的下表面時產生的沾粘的 問題’及減少光學膜及上層材料膜之間的沾粘區域，在大視角 觀察時有白斑的現象，亦減少峰刮傷上層材料膜的機會，有助 於增加包含光學膜及上層材料膜等之電子產品的製造良率。各 稜鏡柱的峰頂角為圓弧狀之設計，更能減少峰刮傷上層材料膜 的機會。 以上所記載，僅為利用本發明技術内容之實施例，任何熟 悉本項技$*者運肖本發所為之修飾、變彳&，冑屬本發明主張 之專利範圍’而不限於貫施例所揭示者。 201100873 【圖式簡單說明】 圖1為已知顯示器的背光系統示意圖。 圖2為已知聚光片的示意圖。 圖3為已知聚光片的各種光線折射模式的不意圖。 圖4為已知聚光片支撐上層材料膜的示意圖。 圖5為本發明第一實施例的光學膜的剖面示意圖。 圖6為本發明第二實施例的光學膜的剖面示意圖。 圖7為說明本發明第二實施例的峰的兩斜面之中分線呈鐘擺 狀週期性左右傾斜的狀態的示意圖。 圖8為本發明第三實施例的光學膜的剖面示意圖。 【主要元件符號說明】 11冷極燈管 13下擴散片 140垂直軸 142基材 146稜鏡峰 31、41、51 基材 12導光板 14聚光片 141棱鏡柱 143、144、145 光線 30、40、50光學膜 32、33、34、35、42、43、44、45、52 稜鏡柱 321、 331、341、351、421、431、441、451、521 峰 322、 332、342、352 峰高 36、37、38、46、47、48 谷 36卜371谷間距 422、432、442、452中分線 11The split line 422, 432, 442, 452 will be tilted left and right in a pendulum shape with different positions, and the angles of the valleys 46, 47, 48 also change with position, so when the optical film 4G and other optical axes Mutual ray, the phenomenon of light dispersion and crease of the money; the heights of the peaks 422, 432, 442, and 452 of the mast 42 and θ43 45 of the optical film 4Q are periodically changed, and are like a pendulum Periodically, when the upper end of the optical film 40 is stacked with another optical film, the bottom edge of the optical film is only turned over by a few convex light control elements, as shown by the peak 421 of the rib chain 42 in FIG. The peaks 441 and 451 of the core 45 of the concave prism column 4 are not touched; therefore, the contact area of the optical film 4〇 with the optical film at the upper end thereof can be greatly reduced, which can effectively reduce the problem of contamination with the upper optical film, and It can reduce the phenomenon of self-(4) in the secret area of the secret area, and can reduce the probability that the 稜鏡(四) peak and the upper light box are directly connected to the upper optical film' to help increase the yield of product manufacturing. The height of the peak between the two adjacent masts of the present invention changes periodically and the valley spacing changes correspondingly, and the peaks of the light control elements are arc-shaped. The optical film disclosed in the patent. The invention makes the structure of the peak of the optical film change periodically and the valley spacing is correspondingly changed, which can effectively reduce the light dispersion phenomenon of the two-phase laminated optical film, and can reduce the chance of occurrence of the moiré, and utilize the optical film. The height of the peak at the upper end of the complex column is periodically changed. 9 201100873 The 'reducing the problem of sticking when the optical film is supported on the lower surface of the upper material film' and reducing the film between the optical film and the upper material film The sticky area has white spots when viewed from a large viewing angle, and also reduces the chance of the peak scratching the upper material film, which helps to increase the manufacturing yield of the electronic product including the optical film and the upper material film. The peak angle of each mast is arc-shaped, which reduces the chance of the peak scratching the film of the upper material. The above description is only for the embodiments that utilize the technical content of the present invention, and any patents that are familiar with the present invention are modified, modified, and claimed, and are not limited to the embodiments. Revealer. 201100873 [Simplified Schematic] FIG. 1 is a schematic diagram of a backlight system of a known display. 2 is a schematic view of a known concentrating sheet. Fig. 3 is a schematic illustration of various light refraction patterns of known concentrating sheets. Figure 4 is a schematic illustration of a known concentrating sheet supporting an upper material film. Figure 5 is a cross-sectional view showing an optical film according to a first embodiment of the present invention. Figure 6 is a cross-sectional view showing an optical film according to a second embodiment of the present invention. Fig. 7 is a schematic view showing a state in which the dividing lines of the peaks of the peaks of the second embodiment of the present invention are periodically tilted left and right in a pendulum shape. Figure 8 is a cross-sectional view showing an optical film according to a third embodiment of the present invention. [Main component symbol description] 11 cold lamp tube 13 lower diffuser 140 vertical axis 142 substrate 146 peak 31, 41, 51 substrate 12 light guide plate 14 concentrating sheet 141 prism column 143, 144, 145 light 30, 40, 50 optical film 32, 33, 34, 35, 42, 43, 44, 45, 52 masts 321, 331, 341, 351, 421, 431, 441, 451, 521 peaks 322, 332, 342, 352 Peak height 36, 37, 38, 46, 47, 48 valley 36 371 valley spacing 422, 432, 442, 452 in the line 11