201100869 六、發明說明： 【發明所屬之技術領域】 本發明是關於一種適合運用在顯示器或者照明設備上 ’同時兼具有擴散及增亮效果之複合式的增亮擴散膜。 【先前技術】 早期用於顯示器之光學膜在設計上，通常根據光學膜 的性質可區分為將光源均勻分散之擴散膜，以及將光源集 中的增亮膜，藉由多層的擴散膜及增亮膜的堆疊，來讓光 源均勻且增壳地投射在顯示面板上。近年來則是出現一種 兼具有增亮及擴散功能的複合式光學膜，此種複合式光學 膜的^^式有很多，以下僅舉1種已知的光學膜作說明。 參閱圖1、2，習知增亮擴散膜丨包含：一透光之基板 層11、一個結合在該基板層u之一入光面lu上的擴散抗 刮層12，以及一個結合與該基板層n之一出光面112上的 擴散增亮層13。其中該擴散抗刮層12包括一個基底121， 以及多數個分散在該基底121内的擴散粒子122，或可為高 低不平之結構，目的為避免刮傷及克服膜片間的吸附問題 ，而該擴散增亮層13具有數個亂排且高度不等的半球形微 透鏡⑶。利㈣微透鏡131的形狀進行聚錢微細顆粒狀 結構之分散擴散能力，可以讓增亮擴散膜丨同時具有增亮 及擴散的效果。 習知增亮擴散，膜1的設計雖然可以達到預期的效果， 但=須透過電鑄翻模之方式以製造凹面母模，再成型擴散 增亮層13,造成製造上的麻煩，同時亦增加材料成本。此 3 201100869 外，習知增亮擴散膜1雖然可藉由亂排及高度不同的微透 鏡131來達到擴散及增亮的目的，但是在相鄰的微透鏡131 之間有許多大小不一的縫隙132,當光線由基板層u的出 光面112送出並通過該擴散增亮層13時，光線在通過微透 鏡131及縫隙132時的效果不一致，會產生不一致的擴散 及透光星砂效果，而降低顯示器品味。根據發明人實際測 試’具有此結構的增亮擴散膜1的單張霧度比較差，且有 效聚光之透鏡密度相對降低，亦即，擴散聚光效果比較不 好。 此外，US 7,286,280 B2發明案提供一種使用在背光模 組之增亮膜，該增亮膜的特色是在膜的表面設置多數緊鄰 相接且直徑較大的半球形微透鏡，然後在數個相鄰之大直 徑微透鏡之間的縫隙間再充填一個個小直徑的微透鏡。前 述美國發明專利雖然已盡量消除縫隙，避免縫隙影響到光 源投射時的均勻度，但無論大、小直徑之微透鏡如何的密 集，仍然會有縫隙存在，故就光源處理的均勻度來說亦不 盡兀善。而與前述發明專利具有類似缺點的還有US2〇〇6- 0146562及US7,092，166等專利，不再逐一說明。 另外，US 7,068,433 B2發明專利揭露一種具有微結構 的聚焦螢幕控制裝置（FOCUSING SCREEN MASTER)，該裝 置具有多數蜂巢形（honeycomb)且緊密排列的微透鏡 (imcn)lens) ’利用微透鏡的高度不同以及高點位置的偏移， 來達到聚焦的目的，此種蜂巢形的微距鏡雖然適合運用在 聚焦螢幕的領域中，但各相鄰的微距鏡之間的縫隙如果沒 201100869 有經過適當的設計，其擴散效果仍不理想，故亦不適合直 接運用在例如顯示器之背光模組上。 【發明内容】 本發明之目的是提供一種高均勻度之擴散增亮結構， 同時利用構造的形狀設計配合，來搭配出適當之輝度增益 比’以達到不同使用需求之增亮擴散膜。 本發明之增亮擴散膜適合應用在顯示器或者照明設備201100869 VI. Description of the Invention: [Technical Field] The present invention relates to a compound brightening diffusion film which is suitable for use in a display or a lighting device and which has both a diffusion and a brightening effect. [Prior Art] The optical film used in the early stage of the display is generally designed to be a diffusion film that uniformly disperses the light source according to the properties of the optical film, and a brightness enhancement film that concentrates the light source, by a multilayer diffusion film and brightness enhancement. The stacking of the films allows the light source to be uniformly and shell-embedded onto the display panel. In recent years, there has been a composite optical film having both a brightening and a diffusing function. There are many types of such a composite optical film, and only one known optical film will be described below. Referring to FIGS. 1 and 2, the conventional brightness-enhancing diffusion film includes: a light-transmissive substrate layer 11, a diffusion scratch-resistant layer 12 bonded to a light-receiving surface lu of the substrate layer u, and a bonding and substrate layer n. The diffusion enhancing layer 13 on one of the light exiting faces 112. The diffusion scratch-resistant layer 12 includes a substrate 121, and a plurality of diffusion particles 122 dispersed in the substrate 121, or may be a rugged structure for the purpose of avoiding scratches and overcoming the problem of adsorption between the films. The diffusion enhancing layer 13 has a plurality of hemispherical microlenses (3) which are disorderly arranged and have different heights. The shape of the microlens 131 is such that the shape of the microlens 131 is dispersed and diffused, and the brightness of the diffusing film can be brightened and diffused at the same time. Conventional brightening diffusion, although the design of the film 1 can achieve the desired effect, but = through the electroforming mold to create a concave master mold, and then the diffusion of the brightness enhancing layer 13, resulting in manufacturing trouble, but also increase the material cost . In addition, although the conventional brightening diffusion film 1 can achieve diffusion and brightening by arranging the microlenses 131 of different heights, there are many slits 132 of different sizes between the adjacent microlenses 131. When the light is sent from the light-emitting surface 112 of the substrate layer u and passes through the diffusion-enhancing layer 13, the effect of the light passing through the microlens 131 and the slit 132 is inconsistent, and inconsistent diffusion and transmissive star sand effect are generated, and the light is reduced. Display taste. According to the actual measurement by the inventors, the single-part haze of the brightness-increasing diffusing film 1 having such a structure is relatively poor, and the lens density of the effective collecting light is relatively lowered, that is, the diffusing and collecting effect is relatively poor. In addition, the US 7,286,280 B2 invention provides a brightness enhancing film for use in a backlight module. The brightness enhancing film is characterized in that a plurality of hemispherical microlenses which are adjacent to each other and have a large diameter are disposed on the surface of the film, and then in several phases. A small diameter microlens is refilled between the gaps between the adjacent large diameter microlenses. Although the aforementioned US invention patents have eliminated the gap as much as possible to avoid the influence of the gap on the uniformity of the light source projection, no matter how dense the large and small diameter microlenses are, there are still gaps, so the uniformity of the light source processing is also Not good enough. In addition to the aforementioned invention patents, there are patents such as US Pat. No. 6,0146,562 and US Pat. No. 7,092,166, which are not described one by one. In addition, the US Pat. No. 7,068,433 B2 discloses a FOCUSING SCREEN MASTER having a microstructure, which has a majority of honeycomb and closely arranged microlenses (imcn) lenses. And the offset of the high point position to achieve the purpose of focusing, although the honeycomb-shaped macro lens is suitable for use in the field of focusing the screen, the gap between the adjacent macro lenses is not properly determined if 201100869 The design, its diffusion effect is still not ideal, so it is not suitable for direct use on backlight modules such as displays. SUMMARY OF THE INVENTION It is an object of the present invention to provide a highly uniform diffusion brightening structure while utilizing the shape design fit of the structure to match the appropriate luminance gain ratio to achieve a different brightness enhancing diffusion film. The brightening diffusion film of the invention is suitable for use in a display or a lighting device
上’並包含：一個基板層’以及一個位在該基板層之一出 光面上的光處理層，該光處理層包括多數緊鄰連接並大致 等同之正六角形的微透鏡，以及數條圍繞該微透鏡的底凹 溝八中°亥等微透鏡都具有一個大致位在幾何中心的頂點 兩兩相鄰且平行之底凹溝間具有一陣列間距（pitch，以下 鴒爯）而所述底凹溝之曲率半徑！·是陣列間距p的 3/25藉此可提高增亮擴散膜之霧度及輝度增益比。 士 您次一特徵在於：該等微透鏡具有一高度H， ^又Η與陣列間距Ρ的深寬比（Η/P)的值為20〜60% , 藉由控制不同的深寬比，可以提高增亮擴散膜之雙張輝度 ^比或者單張輝度增益比，使該增亮擴散膜適合運用在 顯不器或者照明設備上。 緊鄭明之有益功效在於：藉在基板層之出光面上設置 鏡’以及在該等微透鏡之間設 置底凹溝’同時限 明利用單-㈣ 4底凹，㈣曲率半徑，可以讓本發 、、°構即可同時達到增亮及 外，本發明鋅ώ、听命 饋苽元源之目的。此 9，衣比（Η/P)值的配合，亦可提高單張或雙 201100869 張輝度增益比，使該增亮擴散膜適合運用在例如顯示器以 及照明设備等等不同的場合。 【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較佳實施例的詳細說明令，將可清楚 的呈現。 在本發明被詳細描述之前，要注意的是，在以下的說 明内容中，類似的元件是以相同的編號來表示。 參閱圖3、4，本發明增亮擴散膜之實施例丨包含：一 基板層2，以及一個位在該基板層2之一出光面2ι上方的 光處理層3,其中該基板層2還具有—個供光線進人的入光 面22，又本發明實施例！的光處理層3包括：數個緊密排 列並自該出光面21往上突出的正六角形的微透鏡31，以及 圍繞該微透鏡31的數條第—底凹溝32、數條第二底凹溝 32’ ’以及數個第三底凹溝32”。每個六角形微透鏡31都具 有六個鄰近該等底凹溝32、32，、32，，中的其中之一的底邊 311，以及一個大致位在幾何中心的頂點312。 又本發明實施例1之該等第一底凹溝32是彼此平行地 位在正六角形之微透鏡3 1的相反側，每個第一底凹溝32 都具有一條中心線321，而兩兩相鄰之中心線321間的寬度 為陣列間距P(pitch) ’每個第一底凹溝32則是具有一個曲 率半徑r(radius of curvature)。而所述第二底凹溝32,亦彼此 平行，並與第一底凹溝32間形成120度的夾角，該等第三 底凹溝32”亦彼此平行地連接在相鄰的第一及第二底凹溝32 201100869 、32’間，並形成12〇度的爽角，該等第二底凹溝μ，之陣列 間距P以及第三底凹溝32”間的陣列間距？都和第一底凹溝 32的陣列間距P相同，此外，該等微透鏡31之頂點312到 出光面21間具有一高度η。 配合參閱表1，本發明實施例！之陣列間距ρ為Up ，微透鏡的高度η是17_8_，該等底凹溝m,、 32的曲率半徑r皆為3.〇//m。由測試結果得知，本發明實And 'including: a substrate layer' and a light processing layer on a light exiting surface of the substrate layer, the light processing layer comprising a plurality of microlenses adjacent to and substantially equivalent to a regular hexagon, and a plurality of surrounding the micro The microlenses of the bottom groove of the lens have a vertices substantially at the center of the geometric direction, and the adjacent bottom grooves have an array pitch (pitch) and the bottom groove Radius of curvature! • It is 3/25 of the array pitch p to increase the haze and luminance gain ratio of the brightening diffusion film. The second characteristic of you is that the microlenses have a height H, and the aspect ratio (Η/P) of the array spacing Ρ is 20~60%. By controlling different aspect ratios, Increasing the double-brightness ratio or the single-brightness gain ratio of the brightness-enhancing diffusion film makes the brightness-enhancing diffusion film suitable for use in a display device or a lighting device. The beneficial effect of the tight Zheng Ming is: by providing a mirror on the light-emitting surface of the substrate layer and providing a bottom groove between the micro-lenses, while limiting the use of a single-(four) 4 bottom concave, (4) radius of curvature, the hair can be made The structure of the zinc enamel and the source of the invention can be achieved at the same time. This 9, the ratio of clothing (P / P) can also increase the single or double 201100869 brightness ratio, making the brightness-enhancing diffusion film suitable for use in different applications such as displays and lighting equipment. 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 of the invention. Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals. Referring to Figures 3 and 4, an embodiment of the brightening diffusion film of the present invention comprises: a substrate layer 2, and a light processing layer 3 positioned above a light-emitting surface 2 of the substrate layer 2, wherein the substrate layer 2 further has - a light entrance surface 22 for light entering, and an embodiment of the invention! The light processing layer 3 includes: a plurality of regular hexagonal microlenses 31 closely arranged and protruding upward from the light emitting surface 21, and a plurality of first-bottom grooves 32 and a plurality of second depressions surrounding the microlens 31 a groove 32'' and a plurality of third bottom grooves 32". Each of the hexagonal microlenses 31 has six bottom edges 311 adjacent to one of the bottom grooves 32, 32, 32, And a vertex 312 substantially at the geometric center. Further, the first undercut grooves 32 of the embodiment 1 of the present invention are parallel to each other on the opposite side of the positive hexagonal microlens 31, and each of the first bottom grooves 32 Each has a center line 321 and the width between the adjacent center lines 321 is the array pitch P (each of the first bottom grooves 32 has a radius of curvature r. The second bottom grooves 32 are also parallel to each other and form an angle of 120 degrees with the first bottom grooves 32. The third bottom grooves 32" are also connected to each other in parallel with the first and second adjacent ones. The bottom groove 32 is between 201100869 and 32', and forms a refreshing angle of 12 degrees, and the second bottom groove μ, the array pitch P The array spacing between the third bottom trenches 32 ′ is the same as the array pitch P of the first bottom trenches 32. Further, the apexes 312 of the microlenses 31 have a height η between the light exiting surfaces 21 . In the embodiment of the present invention, the array pitch ρ is Up, the height η of the microlens is 17_8_, and the radius of curvature r of the bottom grooves m, 32 is 3. 〇 / / m. The present invention
施例1之單張霧度為96.11%，單張輝度增益比為29 6%， 而雙張輝度增益比為44.0%，由於該增亮擴散膜除了具有較 佳的霧度外，當兩張增亮擴散膜堆疊使用日夺，其測得之雙 張輝度增益比也高$ 44%。亦即，透過增加透鏡週圍之凹 溝及適當的控制微透鏡31之深寬比（微透鏡31之高度h除 以微透鏡31之陣列間距P)，可以獲得較佳之雙張組合輝度 及霧化效果，本發明實施例i之深寬比（H/p)為 41.4%(17.8/43)，該尺寸的限制，使得增亮擴散膜適合庫用 在對於霧度及雙_度增益比要求較高的赫器上。亦即 ’本發明實施例1與圖卜2的習知例比較，除了不必再設 置具有擴散粒子的擴散層外，用來表示擴散效果之單張霧 度，以及代表亮度之雙張輝度增纽都㈣知者佳，因此 ，該實關i不僅製造上較習知例簡單，亦具有較佳的擴 散效果及雙張輝度增益比。 201100869 表1 實驗編號 實施例 習知例 1 2 3 4 5 6 7 8 尺寸 陣列間距（Ρ)--μιη 43 43 43 43 43 43 30 60 50~60(亂數） 微透鏡高度(Η)--μηη 17.8 15.52 20.54 23.56 16.55 15.89 12.8 24 25~30(亂數） 曲率半徑 （Γ)--μπι 3 3 3 3 1.95 6.8 2 4.24 深寬比 （Η/Ρ)--% 41.4 36.1 47.8 54.8 38.5 37 42.7 40 測試 結果 單張輝度增益比（％) 29.6 25.5 31.3 32.7 30.1 26.1 28.1 28.5 31.9 單張霧度 （％) 96.11 95.76 96.02 95.85 96.33 95.93 96.32 95.4 91 雙張輝度增益比（％) 44 41 40 30.3 42.9 42.4 42.3 42.9 41.5 1. 輝度增益比測試標準：以TOPCON公司所生產，型號為 SR-3A的分光輝度計，進行TCO-03之測試。 2. 霧度測試：以NIPPON公司所生產，型號為NDH-5000的 霧度計，進行JIS K 7105之測試。 3. 微透鏡尺寸測量儀器：KEYENCE VK-9500。 參閱表1，本發明實施例2、3、4的構造都與實施例1 相同，且陣列間距P及曲率半徑r亦和實施例1相同，但改 變該等微透鏡31的高度Η，即本發明之實施例2之微透鏡 31的高度Η降低為15·52// m，實施例3的高度Η增加為 20.54 // m，實施例4的高度Η增加為23.56 // m。由表1的 測試結果得知，當微透鏡31之高度Η降低時，增亮擴散膜 之單張輝度增益比較低，反之，則單張輝度增益比會提高 ，故當本發明之增亮擴散膜欲運用在例如照明設備等等的 單張使用場合時，選擇高度Η較大的微透鏡31，可以產生 較佳的單張輝度增益比。 另一方面，本發明實施例2、3所揭示之微透鏡31的 高度Η，在單張霧度及雙張輝度增益比方面也有不錯的表現 201100869 ，故該實施例2、3沾肋-以 器的顯示螢幕上ΛΓ 寸範圍，亦適合運用在顯示 微透鏡31 由實施例4的試驗結果得知，當 Μ透鏡31的高度η女# π “ ^ 明顯祕柄 大於23.56心時，雙張輝度增益比會 發㈣ΓΓ但是單張輝度增益有顯著的提升。因此，本 ^ “列4的比例範圍比較適合運用在照明設備上。 另一方面，木路 Ο Ο 之增壳擴散膜若欲運用在顯示器時，該 ，// 1 #較佳深寬比介於34〜55〇/〇, 4較佳之組合實 &例乾圍’而深寬比介於37 5〜似為多張組合之最佳實施 例，與f知技術約略為半球型微透鏡（深寬比料49〜50%) 相比，具有較佳之多張堆疊輝度表現，例如Ρ=47μηι， 如22.9，’單張輝度4〇9%，深寬比幻％，皆可產生更 同的、-、σ構霧化月匕力避免眩光及提供更高的單張輝度增益比 以集中光線達到節能之目的。 仍/閱表1本發明岫述實施例是在探討微透鏡31之 高度Η對於輝度增纽及霧度的影響，而本發明實施例5、 6則是探討曲率半徑r的適當性，即由實施例5的實驗結得 知田曲率半考工r降低到1.95 // m時，增亮擴散膜的各項試 驗數據都很理想，故該項尺寸規格之增亮擴散膜適合運用 在顯示器或照明設備上，而由實施例6的試驗結果得知， 當率半徑r增加到6.8/zm時，其單張霧度及雙張輝度增益 比都有不錯的表現，但是單張輝度增益比略差，故具有該 尺寸規格之增亮擴散膜適合運用在顯示器上。 仍參閱表1 ，本發明的實施例7、8的結構亦和實施例 1相同，其中實施例7之陣列間距p為3〇//m、微透鏡31 9 201100869 的高度Η為12.8"m，曲率半徑r為2 〇鋒。由試驗 得知，具有前述比例關係的增亮擴散媒，其單張霧度及\ :輝度增益比的比較都不差。相同道理，本發明實施例8 =同時提高陣列間距P、高度H及曲率半徑『後，該增亮擴 散膜之單張霧度及雙張輝度增益比亦有不錯的表現故具 有前述尺寸範圍之增亮擴散膜亦適合運用在顯示器的產品 上0 由以上說明可知，本發明藉數個正六角形的微透鏡31 ’以及在相鄰的微透鏡31之間設置下凹之底凹溝 、32”，並且限定該等底凹溝32、32，、32”的曲率半徑r的 設計，不僅未見於習知增亮擴散膜，前述設計更可讓該增 亮擴散料必特別使用例如擴散粒子料的擴散結構，; 可產生更兩的霧度及擴散效果。此外，本發明亦可藉由微 透鏡31之高度η的選擇，來提高雙張輝度增益比或者翠張 輝度增益比。亦即，當本發明使用在例如顯示器上時，可 選擇具有較佳雙張輝度增益比的比例組合，而當本發明運 用在照明設備時’料選擇具妹佳單張輝度增益比的比 例範圍，故本發明該增亮擴散膜的設計不僅新穎，更可在 不必刻意設計擴散結構的情況下，以選擇不同比例範圍的 方式’來讓該增亮擴散膜適合應用在不同的產品上。 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，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 10 201100869 【圖式簡單說明】 圖1是一種習知增亮擴散膜的剖視示意圖； 圖2是該習知增亮擴散膜之一局部俯視圖； 圖3是本發明增亮擴散膜之實施例1的局部俯視圖； 及 圖4是沿圖3中4-4線所取的剖視圖。The single-sheet haze of Example 1 is 96.11%, the single-brightness gain ratio is 29 6%, and the double-thickness gain ratio is 44.0%. Since the brightness-enhancing diffusion film has better haze, when two brightenings The diffusion film stack uses a daily gain, and the measured double luminance gain ratio is also $44% higher. That is, by increasing the groove around the lens and appropriately controlling the aspect ratio of the microlens 31 (the height h of the microlens 31 divided by the array pitch P of the microlens 31), a better double combined luminance and fogging can be obtained. The effect, the aspect ratio (H/p) of the embodiment i of the invention is 41.4% (17.8/43), and the limitation of the size makes the brightness-enhancing diffusion film suitable for use in the haze and the double-degree gain ratio requirement. High on the device. That is, the first embodiment of the present invention is compared with the conventional example of FIG. 2, except that it is not necessary to provide a diffusion layer having diffusion particles, a single haze for expressing the diffusion effect, and a double luminance enhancement for representing the brightness. (4) It is better to know, so the actual implementation is not only simpler in manufacturing, but also has better diffusion effect and double luminance gain ratio. 201100869 Table 1 Experimental number example Conventional example 1 2 3 4 5 6 7 8 Size array spacing (Ρ)--μιη 43 43 43 43 43 43 30 60 50~60 (random number) Microlens height (Η)-- Μηη 17.8 15.52 20.54 23.56 16.55 15.89 12.8 24 25~30 (random number) Curvature radius (Γ)--μπι 3 3 3 3 1.95 6.8 2 4.24 Aspect ratio (Η/Ρ)--% 41.4 36.1 47.8 54.8 38.5 37 42.7 40 Test results Single luminance gain ratio (%) 29.6 25.5 31.3 32.7 30.1 26.1 28.1 28.5 31.9 Single haze (%) 96.11 95.76 96.02 95.85 96.33 95.93 96.32 95.4 91 Double luminance gain ratio (%) 44 41 40 30.3 42.9 42.4 42.3 42.9 41.5 1. Brightness gain ratio test standard: TCO-03 test is carried out by a spectrophotometer manufactured by TOPCON, model SR-3A. 2. Haze test: JIS K 7105 was tested by a haze meter manufactured by NIPPON Corporation under the model number NDH-5000. 3. Microlens size measuring instrument: KEYENCE VK-9500. Referring to Table 1, the configurations of the second, third, and fourth embodiments of the present invention are the same as those of the first embodiment, and the array pitch P and the radius of curvature r are the same as those of the first embodiment, but the height 该 of the microlenses 31 is changed. The height Η of the microlens 31 of the second embodiment of the invention is reduced to 15.52 // m, the height Η of the embodiment 3 is increased to 20.54 // m, and the height 实施 of the embodiment 4 is increased to 23.56 // m. It is known from the test results of Table 1 that when the height Η of the microlens 31 is lowered, the brightness gain of the brightness enhancement diffusion film is relatively low, and vice versa, the single luminance gain ratio is increased, so that the brightness diffusion of the present invention When the film is to be used in a single use case such as a lighting device or the like, the microlens 31 having a larger height is selected to produce a better single-brightness gain ratio. On the other hand, the height Η of the microlens 31 disclosed in Embodiments 2 and 3 of the present invention also has a good performance 201100869 in terms of single haze and double luminance gain ratio, so the embodiment 2 and 3 are ribbed- The display of the screen is also suitable for use in the display microlens 31. It is known from the test results of the embodiment 4 that when the height of the Μ lens 31 is η female # π " ^ obviously the handle is larger than 23.56, the double luminance The gain ratio will be sent (four), but the single luminance gain is significantly improved. Therefore, the proportional range of column 4 is more suitable for use in lighting equipment. On the other hand, if the shell-forming diffusion film of the wood road Ο 欲 is to be used in the display, the / / 1 # preferably has an aspect ratio of 34 to 55 〇 / 〇, 4 preferred combinations of real & 'While the aspect ratio is between 37 5 and the preferred embodiment of multiple combinations, compared with the roughly known hemispherical microlens (49 to 50% aspect ratio), there are better multiple stacks. Luminance performance, such as Ρ=47μηι, such as 22.9, 'single luminance of 4〇9%, aspect ratio illusion%, can produce more, -, σ-structured atomization force to avoid glare and provide higher single The luminance gain ratio of the luminance is achieved by concentrating light. Still / Reading Table 1 The present invention is to investigate the effect of the height Η of the microlens 31 on the luminance increase and the haze, while the embodiments 5 and 6 of the present invention investigate the appropriateness of the radius of curvature r, that is, In the experimental example of Example 5, it is found that the test data of the brightness-enhancing diffusion film is ideal when the radius of curvature of the field is reduced to 1.95 // m, so the brightness-enhancing diffusion film of this size is suitable for use in a display or On the illuminating device, it is known from the test result of the embodiment 6 that when the rate radius r is increased to 6.8/zm, the single haze and the double luminance gain ratio have a good performance, but the single luminance gain ratio is slightly lower. Poor, so the brightness-enhancing diffusion film of this size is suitable for use on a display. Referring still to Table 1, the structures of Embodiments 7 and 8 of the present invention are also the same as those of Embodiment 1, wherein the array pitch p of Example 7 is 3 〇//m, and the height 微 of the microlens 31 9 201100869 is 12.8 "m The radius of curvature r is 2 〇 front. It has been experimentally found that the brightening diffusing medium having the aforementioned proportional relationship is not inferior in the single haze and the \: luminance gain ratio. By the same token, in the eighth embodiment of the present invention, the array pitch P, the height H, and the radius of curvature are increased at the same time. After that, the single haze and the double luminance gain ratio of the brightness enhancing diffusion film also have a good performance, so that the foregoing size range is The brightness-enhancing diffusion film is also suitable for use in a product of a display. From the above description, the present invention utilizes a plurality of regular hexagonal microlenses 31' and a concave bottom groove 32 between adjacent microlenses 31. And defining the radius of curvature r of the bottom recesses 32, 32, 32" is not only not seen in conventional brightening diffusing films, but the foregoing design allows the brightening diffusing material to specifically use a diffusing structure such as a diffusing particulate material. ,; can produce more haze and diffusion effects. Furthermore, the present invention can also increase the double luminance gain ratio or the luminance gain ratio by the selection of the height η of the microlens 31. That is, when the present invention is used, for example, on a display, a combination of ratios having a preferred double-brightness gain ratio can be selected, and when the present invention is applied to a lighting device, the ratio of the ratio of the brightness ratio of the single-brightness gain is selected. Therefore, the design of the brightness-enhancing diffusion film of the invention is not only novel, but also allows the brightness-enhancing diffusion film to be applied to different products in a manner of selecting different ratio ranges without deliberately designing the diffusion structure. 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 changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view showing a conventional brightening diffusion film; FIG. 2 is a partial top view of the conventional brightness enhancing diffusion film; FIG. 3 is a partial top view of Embodiment 1 of the brightness enhancing diffusion film of the present invention. And Figure 4 is a cross-sectional view taken along line 4-4 of Figure 3.
11 201100869 【主要元件符號說明】 2 基板層 32 21 出光面 321 22 入光面 32, 3 光處理層 32” 31 微透鏡 P 311 底邊 r 312 頂點 Η 第一底凹溝 中心線 第二底凹溝 第三底凹溝 陣列間距 曲率半徑 高度 1211 201100869 [Description of main component symbols] 2 Substrate layer 32 21 Light-emitting surface 321 22 Light-in surface 32, 3 Light-treated layer 32" 31 Microlens P 311 Bottom edge r 312 Vertex Η First bottom groove center line Second bottom concave Ditch third bottom groove array spacing radius of curvature height 12