200944840 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種複合式擴散板結構、背光模組與 液晶顯示器，尤指一種可提高亮度與可視角範圍之複合式 擴政板結構及使用該複合式擴散板結構之背光模組與液晶 顯示器。 、” 0 【先前技術】 液晶顯示器（LCD)之顯示器面板本身不具發光特性，必 須依賴背光模組(Back light module)所提供的光源來達到顯 示的功能’背光模組所提供之光線的亮度、效率、演色性 咼低’影響到顯示器的特性表現，故目前均以研發具有高 亮度、高品質的背光模組為發展重心。 为光模組為液晶顯示器面板(LCD panel)的關鍵零組件 之一，由於液晶本身不發光，背光模組之功能即在於供應 充足的党度與分佈均勻的光源’使其能正常顯示影像。背 © 光模組其主要由光源（包括冷陰極螢光管(CCFL))、熱陰極榮 光管（HCFL)、發光二極體(LED)等）、燈罩、反射板 (Reflector)、導光板(Light guide plate)、擴散板(Diffuser plate)、擴散片（Diffusion sheet 1-2 片）、增亮膜(Brightness enhancement film 1-2片）及外框、變壓器等組件組裝而成； 而在考量輕量化、薄型化、低耗電、高亮度及降低成本的 市場要求，為保持在未來市場的競爭力，開發與設計新型 的背光模組及射出成型的新製作技術，是努力的方向及重 200944840 要課題。 但是由於背光模組尺寸的需求越來越大，而傳統中小 尺寸的使用的侧光式（Side-light)背光模組逐漸被直下式 (Direct-light)的背光模組所取代，側光式的背光模組由於光 源是由導光板側邊打入，光線利用全反射(T〇tal reflecti〇n) 原理在導光板内部反覆的反射、散射來增加光程與均勻 度’再藉由光學設計的微結構來破壞全反射將光線均句的 打出導光板後，再經擴散膜增加擴散，並經增亮膜將光線 聚光到正向視肖後再折射崎提供給本身不發光的液晶面 板顯示影賴㈣純。彳絲式· _ f藏在導光板侧 邊，並由燈罩覆蓋，所以人眼不會直接相燈f，所以均 勻性皆較容易由導光板設計來控制，而燈f受限光 的厚度，所以亮度都較為不足，需加來 度，但是最後觀看的視角往往因為 變小’所以便不適合同時多人觀看。反 流的直下式的背光模組，因為所t LCD-TV ± Ο 導光板射出平整性與射出機的嘲數^寸越大k，以大型 作的難度越高，且整體的重量越*(輪大不易達成’製 已經不適用大尺寸電視的需求，心所以常見侧光導光板 輝度(Brightness)或亮度需求越高，面積越大所需要的 所以側光式的導光板因無法容下多^數相對要多很多’ 在的大面積且高輝度的需求。大^燈管，已不能滿足現 需要導光板的側光式背光模組，目 <的液晶電視不再使用 的直下式背光模組才能達到高輝声採用能使用多燈管 又、廣視角的電視需求。 200944840 、高亮度的 光源’基本原理係將常用的類似點或線型光源，透過簡潔 有效光機構轉化成南亮度且均一 I# AA 1 _200944840 IX. Description of the Invention: [Technical Field] The present invention relates to a composite diffuser structure, a backlight module and a liquid crystal display, and more particularly to a composite expansion board structure capable of improving brightness and viewing angle range The backlight module and the liquid crystal display using the composite diffuser structure. , 0 [Prior Art] The display panel of the liquid crystal display (LCD) itself does not have the illuminating property, and must rely on the light source provided by the backlight module to achieve the display function. The brightness of the light provided by the backlight module, The efficiency and color rendering are low, which affects the performance of the display. Therefore, the development of high-brightness and high-quality backlight modules is the focus of development. The optical module is the key component of the LCD panel. First, since the liquid crystal itself does not emit light, the function of the backlight module is to supply a sufficient degree of party and uniform light source to enable normal display of images. The back light module is mainly composed of a light source (including a cold cathode fluorescent tube ( CCFL)), hot cathode ray tube (HCFL), light emitting diode (LED), etc., lampshade, reflector, light guide plate, diffuser plate, diffusion sheet (Diffusion sheet) 1-2 pieces), brightness enhancement film (Brightness enhancement film 1-2 pieces) and components such as frame and transformer are assembled. Considering lightweight, thin, low power consumption and high brightness And to reduce the cost of the market, in order to maintain the competitiveness in the future market, the development and design of new backlight modules and injection molding new production technology, is the direction of the effort and focus on 200944840. But due to the size of the backlight module Increasingly large, the traditional medium and small size of the Side-light backlight module is gradually replaced by a direct-light backlight module. The side-lit backlight module is made up of a light source. The side of the light guide plate is driven in, and the light is reflected and scattered by the principle of total reflection (T〇tal reflecti〇n) inside the light guide plate to increase the optical path and uniformity. Then the optical structure is used to destroy the total reflection. After the light is spread out of the light guide plate, the diffusion film is used to increase the diffusion, and the light is concentrated by the brightness enhancement film to condense the light to the front view, and then the refracting is provided to the liquid crystal panel which does not emit light (4) pure. The type _ f is hidden on the side of the light guide plate and covered by the lamp cover, so the human eye does not directly touch the lamp f, so the uniformity is easier to control by the light guide plate design, and the lamp f limits the thickness of the light, so The degree is not enough, it needs to be added, but the viewing angle of the last viewing is often because it is smaller, so it is not suitable for many people to watch at the same time. The reverse direct backlight module, because the LCD-TV ± Ο light guide plate is flat Sex and the sneak shot of the injection machine, the larger the k, the higher the difficulty of the large-scale work, and the overall weight is more* (the wheel is not easy to achieve), the demand for large-size TV is not applicable, so the common side light guide plate brightness (Brightness) or the higher the brightness requirement, the larger the area is needed, so the side-light type light guide plate has a large area and high brightness requirement because it cannot accommodate many more. The large-light tube can no longer meet the side-lit backlight module that needs the light guide plate. The direct-lit backlight module that is no longer used in the liquid crystal TV can achieve high-glow sound, and can use multiple lamps and wide viewing angles. TV demand. 200944840, High-brightness light source' The basic principle is to convert the commonly used similar point or line light source into a southern brightness through a simple and effective optical mechanism and uniform I# AA 1 _
,"八-J tJ、J囬尤鄉_，丹經 擴散片的均光作用與稜鏡片的集光作用以提高光源的亮度 背光模組主要係提供液晶顯示面板_均句、 與均齊度。 ❹ 一般來說，光線自光源發出後經一擴散板射出，但由 擴散板射出之光的指向性較差’因此必須利用稜鏡片（prism sheet)來修正光的方向，其原理藉由設計之幾何結構使光線 折射與全反射來達到凝聚光線、提高正面輝度的目的，但 經由此方式所得到的背光源由於僅是將大視角光線往小角 度收敛來達成增党效果’所以視角會變小，使得顯示号在 觀看上會出現視角太小的問題，亦即使用者必須在顯示器 正面的一個小角度範圍觀看晝面，否則將無法清楚欣賞顯 示器所播放的影像’此即造成使用者相當程度的不便，因 ® 此目前也有新式利用多層膜干涉原理達成偏光轉換之增亮 膜(DBEF)來達成不壓縮視角而達全視角增亮的設計。使用 直下式背光模組的液晶電視由於背光模組中的多根燈管是 直接設置在背光模組的燈箱内，燈管發出的燈光是人眼會 直接直視的，所以若僅將燈管放入燈箱而未將光線作均勻 設計時就不能當成背光源使用，這樣會造成背光模纟且的均 勻不佳，出現明暗的輝度變化，造成所謂的燈管影像與燈 管不均勻現象（日本稱為MURA)，直下式背光模組的燈源設 200944840 ίG就:ί:ίί的曰光燈管-樣，看到有燈管的地方 以直吕、燈管中間暗帶區的輝度就降的很低’所 構式擴都f要紐板與多張擴散膜甚至用微結 這樣均勻的背光模組才不會造成液2 ==:本r的複合式擴散板由於可以將 燈箱、照明燈具、路提㈣賴組、廣告 需求。 a等的擴散板之需要均勻的照明使用 緣是，本發明人有感上述缺失之可改善，且吝 理之運用，而提出一種二 發明。 又十口理且有效改善上述缺失之本 【發明内容】 ©式擴提高亮度與可視角範圍之複合 結構之背:光模組與液 模組的光源輝度並提升先線4)=二，維持背光 ,,, _ 庚散進而#供液晶顯示器較 佳的輝度_性及較大的觀看視角。換言之 ^管或降低背光模組厚度的情況下 :月= MURA的問題。 ^ ^ ^ ^ 根據本發明之其中-種方案，提供一種複合式擴散板 200944840 結構，其包括：一透光本體單元及一印刷式微型結構# 擴散單元。其中，該透光本體單元係具有―透光主層、；^ 數顆形成於該透光主層内部之微型擴散顆粒（Μ=〇 diffusion particle)，使光線於透光本體單元内擴散。其0 透光本體單兀的兩側具有<人光面與—出光面。該印： 微型結構透鏡擴散單元係具有複數個透過印刷方式而成$ 於該透光本體單元入光面或出光面上之印刷式微型結構透 鏡擴散點（Printing microlens diffusion dot)。 根據本發明之其中一種方案’提供一種背光模組，其 包括：-反射，元、-發光單it及—複合式擴散板結構二 其中’ 3兹反射單元係具有一反射板、一由該反射板所圍成 之谷置空間、及一形成於該反射板的内表面之反射塗層。 該發光單元係具有複數個容置於該容置空間内之發光_ 件。 ^ Ο 此外，該複合式擴散板結構係設置於該發光單元的上 方，並且該複合式擴散板結構係包括：一透光本體單元及 一印刷式微型結構透鏡擴散單元。其中，該透光本體單元 係具有一透光主層、複數顆形成於該透光主層内部之微型 擴散顆粒（Micro diffusion particle)，使光線於透光本體單 元内擴散。其中該透光本體單元的兩侧具有一入光面與一 出光面。該印刷式微型結構透鏡擴散單元係具有複數個透 過印刷方式而成形於該透光本體單元入光面或出光面上之 印刷式微塑結構透鏡擴散點（Printing microleris diffusion dot)。 200944840 根據本發明之其中一種方案，提供一種液晶顯示器， 其包括：一液晶顯示面板及一背光模組，並且該背光模組 係設置於該液晶顯示面板的下端以提供該液晶顯示面板所 需的光源。 再者’該背光模組係包括：一反射單元、一發光單元 及一複合式擴散板結構。其中’該反射單元係具有一反射 板、一由該反射板所圍成之容置空間、及一形成於該反射 板的内表面之反射塗層。該發光單元係具有複數個容置於 該容置空間内之發光元件。 因此’本發明具有下列優點及功效產生： 1、k供·一具有複合功能的擴散板結構可同時具有 維持光源輝度及增加光線擴散散射而提升背光模組的均勻 性並消除MURA問題的功能，並能提供液晶螢幕較大的觀 看視角。 ...2、另'~~方面，複合式擴散板結構可與發光單元及反 〇 射單元相互配合而形成一背光模組（亦可增加數片擴散崩 或增亮膜），以提升背光模組所輸出視覺的均勻性品質。 3、此外，因為由複合式擴散板結構、發光單元及反 射單元所組合之#光模組可與液晶顯示面板相互配合以掠 供均勻的背光源，所以能本發明能提升液晶顯示面板所里 現之影像品質均勻性。 為了能更進-步瞭解本發明為達成預定目的所採取之 技術、手段及功效，請參閱以下有關本發說 附圖，相信本發明之目的、特徵與特點，當可由 11 200944840 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】 請參閱第一 A圖及第一 B圖所示，本發明第一實施例 係提供一種液晶顯示器，其包括:一液晶顯示面板L及一背 光模組B1 ’並且該背光模組B1係設置於該液晶顯示面板L ❹ 的下端以提供該液晶顯示面板L所需的光源。此外，該背 光模組B1係包括:一反射單元丨、一發光單元2、一複合式 擴散板結構m、及三片依序設置於該複合式擴散板結構D1 上方之一第一擴散膜6、一第二擴散臈7及一第三擴散膜8。 其中’該反射單元1係具有一反射板1〇、一由該反射 板10所圍成之容置空間11、及一形成於該反射板10的内 表面之反射塗層12’其中該反射塗層12常為一具有高反射 特性的膜片所構成’其通常被貼附於反射板1〇上，亦有直 ⑩ 接將高反射塗料塗佈於該反射板1〇上的設計，其中該反射 板10係可為呈現一具有杯狀(Cup-shaped)或任意形狀之半 開放式結構，且多為沖壓之鐵件或其他輕金屬件構成。此 外’該反射塗層12係可為白色塗層或銀色塗層，銀色塗層 多為蒸鍍鋁、銀等高反射性材質，能提供高輝度需求，但 由於類似鏡面所以擴散散射能力很差，而白色塗層多為增 加散射之用途，較能將光線均勻擴散開，而該白色反射塗 層多為含高度密度擴散顆粒或經發泡的膜片所構成，原理 是利用折射專的差異造成光線的高度散射與反射達成均勻 12 200944840 散射反射的作甩。 再者，該發光单元2係具有複數個容置於該容置空間 11内之發光元件20，並且依據不同的需求’該等發光元件 20係可為複數個冷陰極燈管（Cold Cathode Fluofeseent Lamps ’ CCFL)、複數個發光二極體(LED)、熱陰極燈管 (HCFL)、或其它任意型式的可發光元件。此外，由第一 b 圖可知’該等發光元件20所投射出來的光線可直接向上方 投射或透過反射塗層12的反射與散射後再向上方投射，其 ❹ 中上述的白色塗層係用於使得反射後的光線產生較高的均 勻度(Uniformity)，而上述的銀色塗層係用於使得反射後的 光線產生較高的亮度(Brightness)。 另外’该複合式擴散板結構D1係設置於該發光單元2 的上方’其中s亥複合式擴散板結構d 1係包括:一透光本體 單元3及一印刷式微型結構透鏡擴散單元4。其中，該透光 本體單元3係具有一透光主層30及複數顆形成於該透光主 層30内部之微型擴散顆粒(Micro diffusion particle)31，顆 ❿ 粒一般為透光材料與本體30的折射率有差異，折射率差異 越大其擴散能力會越高，而微型擴散顆粒31的形狀一般為 圓球形，亦有長條型，橢圓形等特殊形狀或多種大小不同 或形狀不同或材質折射率不同的擴散顆粒混合而成，擴散 顆粒的形狀、大小、折射率、分佈密度都會影響擴散板的 擴散能力與穿透率。並且該透光主層3〇的上表面及下表面 "T再a又置具有與该透光主層共押出（Co-extrusion)之透光 副層（Sub-layer)(300、301)，而此透光副層常依製程需求而 13 200944840 有所設計，一般而言，透光副層的厚度都比透光主層小， 透光副層300、301的厚度約為透光主層3〇的5%〜30%，若 採多層共押出製程，亦可製作具有更多層透光副層3〇〇、3〇1 的擴散板。一般也可採無透光副層3〇〇、3〇1的設計而僅設 置透光主層30的擴散板。以共押出（c〇_extrusi〇n)製程而 吕，s玄透光副層300、301内主要會添加紫外光吸收劑，可 將大部分紫外光線吸收，以免液晶受燈管發出的紫外光線 長期J3、?、射而知壞或劣化，透光副層3〇〇與3〇1層一般都是 ❹可以再額外添加一些功能型輔助添加劑於其内部，如抗紫 外線、螢光增白劑、抗靜電劑等。而微型擴散顆粒31亦有 可以添加在此透光副層300與301中，亦有僅將微型擴散 顆粒31不添加於透光主層3〇内，而僅添加於透光副層3〇〇 與301中的設計，即透光主層3〇與透光副層3〇1、3〇3内 部均可以添加微型擴散顆粒31。若以單層押出製程而言， 因無没置透光副層300、301於透光主層30的上下表面， 此時會僅將紫外線吸收劑或微型擴散顆粒31添加在透光主 ❹層30之内’此時入光面3〇2與出光面3〇3將直接設置於於 透光主層30的表面上。 再者’擴散板若有設置透光副層3〇〇、301於透光主層 30的兩相對端時’此時入光面3〇2及一出光面3〇3即設置 於透光副層300、301之兩側表面。擴散板若無設置透光副 層300、301時，入光面3〇2及出光面3〇3就直接設置於透 光主層30的兩侧表面。而本發明的微結構透鏡5〇與印刷 式微型結構透鏡擴散點40就設置於入光面302與出光面 14 200944840 303上，並且該透光主層30的材質與透光副層300、301的 材質可為係選自聚碳酸脂(Polycarbonate ’ PC)、聚曱基丙烯 酸甲酯（Polymethylmethacrylate，PMMA)、聚苯乙稀 (Polystyrene，PS)，曱基丙烯酸曱酯聚苯乙烯 (Methylmethacrylate Styrenre ， MS)或聚丙稀 (Polypropylene ’ PP)的材料或其他高分子聚合熱塑性材料之 選擇或相互混合一定比例添加。然而，上述的材質只是用 ❼ 來舉例說明而已，其並非用以限定本發明。 另外，該等微型擴散顆粒31係以0.001%至50%之比例 添加於該透光主層30或透光副層300、301中，並且該等 微型擴散顆粒31之任一方向的光學折射率(Refract index) 與該透光主層30之光學折射率之差異在± 〇〇2〜±〇5之 間’通常折射率差異越大的擴散性越高。而針對具有高穿 透率特性的具表面微結構型的新式擴散板而言，為了維持 其尚穿透率的特性而常僅會少量添加擴散微型顆粒31的顆 粒於透光本體單元3内部的透光主層3〇或透光副層3〇〇、 © 301内。此外，該等微型擴散顆粒31係可為聚甲基丙烯酸 曱酯粒子(Polymethylmethacrylate，PMMA)、聚碳酸脂粒子 (Polycarbonate，PC)、聚本乙稀粒子(p〇iyStyrene，p|§)或聚 =稀(polypropylene，PP)或二氧化矽(Si〇2)，曱基丙烯酸曱 醋聚苯乙婦(Methylmethacrylate Styrenre，MS)或其他混合 之高分子聚合材料，並且該等透明微型擴散顆粒31之粒徑 係界於0.1至30微米（vm)之間，根據米氏(Mie)散射理論， 微型擴散顆粒31的顆粒大小變化會影響散射的型態與散射 15 200944840 配光角度。然而’上述微型擴散顆粒31的枋質只是用來舉 例說明而已’其並非用以限定本發明。 此外’該印刷式微型結構透鏡擴散單元4係具有複數 個透過網版印刷（Screen-printing)方式而成形於該透光本體 單元3的入光面302上之印刷式微型結構透鏡擴散點 (Printing microlens diffusion dot)40，並且該等印刷式微型結 構透鏡擴散點4 0的上表面可為非球形表面威類似些微凹凸 起伏的曲面所構成，印刷式微型結構透鏡擴散點40大小或 密度分佈的設計並可將其設計為圓形，方形’或多邊形等 基本組成單元的分佈型態，或多種不同形狀依一定比例混 合’實際網版印刷製程時其印刷式微型結構透鏡擴散點40 的大小也因印刷網版的網目的大小、密度不同而有些微差 異，網版印刷的製程、印刷油墨材料的黏度都會對形狀與 最後的光學特性有所影響。大致而言，此印刷式微型結構 透鏡擴散點40的大小分布約從i〇pm〜4mm，此印刷式微型 結構透鏡擴餘40的尺拉小與精準度會受限於網版張網 的網目（Mesh)大小，較穩定的網版印刷.製程义6〇聰〜imm 的網點尺寸較佳，印刷式微型結構透鏡擴散點4g分佈的高 度約為2μηι〜30μΐη，較佳的印刷高度以払丨 高度會受限於印刷時的油墨黏度，下墨量、刮工 刀速度、刮刀硬度、網布網目、網布材質、 機械參數。印刷式微型結構透鏡擴散點 刀為樹脂類混合物與擴散顆粒如二氧化矽、_ _ 要成 酸鋇、稀釋劑、輔助添加劑等，一般製二二氧化鈦、硫 衣桎會因不同類型油 16 200944840 墨的製程手段不同’印刷製程結束會經#或紫外光燥 固化而將所設計的印刷式微型擴散點4 0成形於擴散板^表 面上，即印刷式微塑結構透鏡擴散點40可依需東μ置於透 光本體單元3的入光面302或出光面3〇3上，如=更高擴 散性時可於入光面302與出光面303兩面皆設置印刷二微 型結構透鏡擴散點40。 a 再者，該等發光元件20上方的印刷式微型結構透鏡擴 ❹ 政點.40的排列後度較向’而離s亥專發光.元件2〇上方偏一 邊的印刷式微塑結構透鏡擴散點40的排列密度較低，但是 此知'性仍須根據整體機構没计與膜片的搭配而改變，擴散 點40亦可能出現呈現非單調遞增或單調遞減的大小分布或 密度分佈狀態。分布與尺寸大小有可能由大變小再變大， 或由小變大再變小的變化。這都因使用的膜片組配與背光 模組燈管間距與模組的厚度與反射片的擴散特性(B s D F)有 關，這些印刷式微型結構透鏡擴散點40的大小與間隔密度 差異都可藉由光學模擬(Optical simulation)來設計並分析而 © 調整之。若以一般的設計架構而言，一部分的印刷式微型 結構透鏡擴散點40係靠近該等發光元件20,另一部分的印 刷式微型結構透鏡擴散點40係遠離該等發光元件20,並且 靠近該等發光元件2〇的印刷式微型結構透鏡擴散點40的 密度比遠離該等發光元件20的印刷式微型結構透鏡擴散點 40的密度大，當然除了可用密度分佈調整外也可以設計成 印刷式微型結構透鏡擴散點40的直徑大小可依燈管的位置 而變化’印刷式微型結構透鏡擴散點40的密度與尺寸大小 17 200944840 的變化這都是可使用的光學設計調整手段。 再者，依實際的設計需求，上述三片依序設置於該複 合式擴散板結構D1上之一第一擴散膜6、一第二擴散膜7 及一第三擴散膜8可變換為「一第一擴散膜、一第二擴散 膜及'"""反射式偏光增免膜（Dual Brightness Enhancement Film，DBEF)」或「一第一擴散膜、一第二擴散膜及一具超 微細稜鏡結構之增亮膜（Brightness Enhancement Film， BEF)」。當然，依據不同的需求’亦可增加或減少擴散膜或 增亮膜或其他新型微結構光學膜片的數量。以目前降低成 本與輕薄(Slim)的設計趨勢而言，都會儘量將可用膜片數量 減少，目刖也有只用兩張下擴散膜的背光機種設計，但可 知膜片減少後燈管MURA與輝度不均問題會更嚴重，而以 本發明的設計可以降低使用的膜片數量並降低或消除 MURA問題。 因此，由第一 B圖的箭頭可知，透過該反射塗層12、 該等印刷式微型結構透鏡擴散點4〇及該等微型擴散顆粒31 ❹的配合，以使得該等發光元件20所產生的光線產生散射 (Scattering)’進而增加穿出該出光面3〇3之光線的擴散度及 均勻度。特別是:本發明透過該等成形於該透光主層3〇的入 光面302上之印刷式微型結構透鏡擴散點（printing microlens diffusion dot)40來均勻散射該等發光元件2〇所產 生的強烈的直射光線，使得該尊發光元件2〇所產生的光線 ，生散射反射，亦即使得該等發光元件2〇上方較亮區域的 凴度降低’此時此光線就能因印刷式微型結構透鏡擴散點 18 200944840 40的°又置而將光線反射到兩燈管之間的暗帶區域，這樣就 使得，發光元件2G旁_本較暗的區域的 亮度明顯增 加&種此散射燈管上方亮帶的強烈光線並使其光線反射 !_T =燈管之間暗帶區上方的效果就能降低明暗的差異， 就疋月匕降低MURA的主要原理。因此，本發明以解決源頭 的=式’採用該等印刷式微型結構透鏡擴散點4〇為進行光 均句化的第-修正手段，有效地來增加光線擴散度及均勻 度’ ^提供液晶顯示ϋ触的正向輝度及較大的觀看視 罾角。^祕如果先在進人擴散板㈣之前已經先經一次 印刷式微㈣構魏擴散點*散射反射的均自過程，就可 以使整體背光模組的均勻性明顯提升。而本發明利用印刷 式微型結構透鏡擴散點40的尺寸大小、形狀、厚度、與密 ^分佈來微調進人擴散板的光線後，首先此手段已經將燈 管上方的輝度降低並同時提升兩燈管之間暗帶的輝度，所 以就已經可以明顯減低明暗的MURA差距。可知印刷式微 变、结構透鏡擴散點40的主要功用是調整打入擴散板的透光 Ο 主層3〇與透光副層300、301之前的光線分佈位置的均勻 性。先前技藝的傳統直下式擴散板設計，多為使用添加擴 散顆粒=擴散板的方式或採用表面具微結構的擴散板設 計。先刚技藝無此印刷式微型結構透鏡擴散點4〇，就無法 在燈源光線進入擴散板内部之前來調整光線分佈位置的均 勻性，僅罪微結構只能調整光線的方向，不能明顯地改變 光線的位置分佈。使用傳統擴散板會使進入擴散板的光線 一開始就在燈光上方處很強很亮，而兩燈管中間的暗帶仍 19 200944840 •然很暗，所以MURA問題就报嚴重了。這是本發明的複合. 式擴散板與傳統擴散板最大的差異。若是將印刷式微型結 構透鏡擴散點40設置在出光面303時，此時亦有能將由燈 管發出之強光散射並柔化的效果，但因光路徑與光程距離 不同，一般而言，擴散效果會比設置在入光面處時稍微降 低一些，但是這樣印刷式微型結構透鏡擴散點40可設置於 入光面或出光面的設計可以較有彈性的搭配未來燈箱或背 ❹ 光模組機構的設計使用。在新式薄型化或減燈管節能型的 背光模組依機構大小考量與支撐鋼性考量，一般使用擴散 板的厚度約0.7〜3mm左右，光線在如此薄的厚度内要將光 線擴開是很困難的，所以傳統擴散板都用增加擴散板厚度 來增加擴散的次數與距離，而此時若一味的增加厚度或降 低穿透率，過度添加擴散顆粒的數量將會達飽和狀態，只 會讓最後的背光模組輝度下降更多，而MURA也無法消 除，過度增加擴散顆粒數量與增加板材的厚度都會使成本 費用增加，重量增加，厚度增加。而本發明使用厚度僅幾μιη ❹厚的印刷式微型結構透鏡擴散點4〇完全不會增加擴散板的 厚度與重量問題，並可以大幅地提升擴散板的擴散能力， 增加薄型化與減燈省能源背光模組機種的設計空間。 凊參閱第二Α圖及第二Β圖所示，其分別為本發明液 晶顯示器的第二實施例之侧視分解示意圖及側視組合示 圖。由上述圖中可知，本發明第二實施例與第一實施例最 大的差別在於:一複合式擴散板結構D2更進一步包括:一微 型結構透鏡擴散單元(Microlens diffusion unit)5，其具有複 20 200944840 數個成形於该透光副層301上的出光面303之微型結構透 鏡〇破型結構透鏡依光源使用不同亦可以由類似條枉 狀的維結構方向的排列改為類似二維矩陣陣列式排列的 透鏡結構，微型結構透鏡50若是採一維的條柱狀透鏡時則 較適合現在直下式背光模組光源如CCFL，jjCFL等的類似 線性光源，而微型結構透鏡5〇若採二維陣列式的透鏡陣列 設置時則較適合類似點光源如發光二極體(LED)光源的使 用。以本發明第二實施例而言，該等微型結構透鏡50的微 結構結構剖面輪廓係為高度約100um而週期約2〇〇um半圓 輪廓，此半圓形輪廓沿一定方向延伸即形成柱狀透鏡，一 般此種柱狀長條微結構的加工可用鑽石刀加工成型得之， 一般微型結構透鏡5〇的微結構尺寸深度約1〇〜4〇〇um，而 ❹ 結構的深寬比(Aspect ratio)都小於1。當然若加工路徑可變 化時其柱狀延伸的方向可以有不同方向的變化，此時就 可以製作出如河流般蜿蜒曲折延伸的柱狀透鏡，這種蜿蜒 曲折分佈的長條柱狀的微型結構透鏡5 〇的好處是具蜿蜒的 不規則可以消除規則性物體相疊而產生疊紋干涉的 視，問題，絲則與LCD面板疊合時常會有這樣的疊紋 問題發，。當然，依據不同的背光源與模組燈距、背光機 構厚，4 ⑸求’ Θ微型結構透鏡5G的輪|jj剖面之構成 曲，係可為半橢圓、菱形(prism)、非球面(Asph㈣或其它 任意的形狀’或各種結構混合構成的微結構體，不同^ 結構體的擴❹度與擴散能力不同，設計時搭配所適合的 模組性質、厚度、燈管數也會有較好的配合性與均勻性。 21 200944840 而微型結構透鏡50為長條狀的原因是⑽ 原:故!要較強的'維的擴散能力將其類似線: 源擴散成類似面光源，未來更可因光源的不同，其排列而 改f陣列(Α—形式。以本發明第三實施例而言，如背光 源=用LED光源時，此時微型結構透鏡％就會使用圓形、 Z 角型、多邊形等具二維方向擴散能力的擴散透 參 鏡’即微型結構透鏡5G就可改設置成二維陣列的結構體， 如凹凸半球型，凹凸金字塔型，凹凸圓錐型。此二維陣列 的結構體能將LED等類似軸對稱光源將其光線朝各方向均 勻擴散’這樣類似二維的微結構本體再搭上印刷式微型結 構透鏡擴散點40之構成的複合紐板將可以提供背光 模組使用。本發明之第四實施例，可同時採用類似LE〇點 光源與類⑽錢的CCFL㈤轉麵複合#光光源，此 日^微型結構透鏡50可為一維柱狀或二維陣列同時並存設置 並搭配-維或二維分佈的印刷式微型結構透鏡擴散點4 〇而 形成複合擴散板。 © 由第二B圖的光路徑箭頭可知，光線透過該反射塗層 12、該等印刷式微型結構透鏡擴散點4〇、該等微型擴散顆 粒31及遠微型結構透鏡5〇的配合，以使得該發光元件2〇 所產生的光線產生散射（scatter)，進而增加穿出該出光面 303之光線的擴散度及均勻度。特別是:本發明透過該等成 形於該透光本體單元3的入光面302上之印刷式微型結構 透鏡擴散點(Printing microlens diffusion dot)40 來散射反射 該等發光元件20所產生直接強烈向上射入的光線，使得該 22 200944840 等發光元件2〇所產生的光線產生散射，亦即使得該等發光 元件20上方較亮區域的亮度降低，並且使得該等發光元件 20旁側燈管之間較暗區域的亮度增加。因此，本發明以解 決源頭的方式’採用該等印刷式微型結構透鏡擴散點4〇為 進行第一次燈管直射光線的均勻化，有效地來增加光線擴 散度及均勻度，進而提供液晶顯示器較佳的正向輝度及較 大的觀看視角。 傷 請參閱第三A圖及第三B圖所示’其分別為本發明第 一種發光元件的部分排列上視示意圖、及本發明配合第一 種發光元件所使用之第一種具有不同網版之網點密度及尺 寸的網版之部分上視圖。由上述圖中可知，若本發明第一 實施例與第二實施例所使用的複數個發光元件2〇a係為冷 陰極燈皆（Cold Cathode Fluorescent Lamps，CCFL)，第一實 施例與第二實施例中的該等印刷式微型結構透鏡擴散點4〇 係可為複數個透過一網版S1而成形於一透光本體單元3的 入光面302上之網印式微型結構透鏡擴散層（Screen printing ❹ microlens diffusion layer)，其中網版si的網點N1具有不同 的密度及尺寸，常見情況是靠近該等發光元件2〇a之網點 N1的度或尺寸比遠離该等發光元件2〇a之網點Ni的密 度或尺寸大。換g之，該網點N1的密度大小與該等發光元 件20a設置的位置有關，當該等印刷式微型結構透鏡擴散 點40的油墨透過該網版si的網點N1而成形於該透光本體 單元3的入先面302時(如第一 B圖或第圖所示），愈 靠近該等發光元件20a之印刷式微型結構透鏡擴散點4〇的 23 200944840 密度或尺寸愈大(亦即愈靠近該等發光元件施的網點 密度或尺寸愈大）。 請參閱第四A圖及第四b圖所示，其分別為本發明第 一種發光元件的部分排列上視示意圖、及本發明配合第二 種發光元件所使用之第二種具有不同網點密度及尺寸的網 版之部分上視圖。由上述圖中可知，若本發明第三實施例 使用的複數個發光元件2〇b係為發光二極體，第三實施例 中的該等印刷式微型結構透鏡擴散點4 〇係可為複數個透過 一網版S2而成形於一透光本體單元3兩側之入光面3〇2上 的網印式彳政型結構透鏡擴散層（gcreen printing microlens diffusion layer)，其中網版S2的上的網點N2設計具有不同 的密度及尺寸大小，印刷製程後的網點N2大小與密度就會 決定印刷式微型結構透鏡擴散點40的大小與密度。靠近該 等發光元件20b之網點N2的密度與尺寸比遠離該等發光元 件20b之網點N2的密度大。換言之，該網點N2的密度與 尺寸大小與該等發光元件20b設置的位置有關，當印刷油 〇 墨透過網版S2上不同大小與密度的透墨網點N2印刷而於 入光面302上形成印刷式微型結構透鏡擴散點40(如第一 B 圖或第二B圖所示），愈靠近該等發光元件20b之印刷式微 型結構透鏡擴散點40的密度與尺寸愈大(亦即愈靠近該等 發光元件20b的網點N2密度與尺寸愈大）。 請參閱第五圖所示，複數個印刷式微塑結構透鏡擴散 點40a亦可能出現呈現非單一遞增增或遞減的大小分布或 密度分佈狀態，有可能由大變小再變大，或由小變大再變 24 200944840 配與背光模組燈管間距與模組的 擴散特性有關，這些印刷式微塑結 tin40a的大小與間隔排列密度差異都可藉由光 來設計並分析而調整優化之。t然除了可用密度調 ❹ ❹ 整外也可⑽計成娜的直徑大小依奸的位置而變化， 可用的光學設計的調整手段，再者本發明的印刷式 i ’構透鏡擴散點，除將印㈣式微型結構透鏡擴散點4如 設置於入光面302外，更可以根據設計的需求將印刷式微 1結構透鏡擴散點40a設置在出光面3〇3 i，這樣一樣能 達到反射散射擴散的效果，其整體均勻擴散的效果也是需 搭配微型結構透鏡50a的形狀與大小，以光學模擬得其結 果。或者如第五圖所示可以將擴散板透光本體單元3的入 光面302與出光面303的雙面表面以印刷製程製作印刷式 微犁結構透鏡擴散點40a。整體而言，本發明的複合擴散板 其微.型結構透鏡50a的結構可依據背光源種類的需求設 置’可為半球、非球面、橢圓、拋物面、雙曲面、或蔓形 等任意形狀組合之一維長條柱狀透鏡或採二維排列設置的 陣列透鏡陣列，印刷之微型結構透鏡擴散點4〇a可以設置 與微型結構透鏡50a於相同側或不同侧，即微型結構透鏡 擴散點4〇a與微型結構透鏡50a可以同時存在於擴散板的透 光本體單元3的入光面302或出光面303，這樣的光學設計 一樣可以達到本發明擴散的效果，差異在於先反射與後反 射的順序與光程路線不同，會造成整體光線配光會有所差 異，但都可以達成高度擴散的效果。 25 200944840 請參閱第六A圖至第六c圖所示，第六A圖係為習知 只具有，光本體單元3a之複合式擴散板結構Da的示意 圖’第六B圖係為本發明具有透光本體單元3及印刷式微 型結構透鏡擴散單it 4之複合式擴散板結構叫的示意圖， 第六C圖，_本發明具有透光本體單元3、印刷式微型結構 透鏡擴散單το 4及微型結構透_散單元5之複合式擴散 板結構D2的不意圖。 參 ❹ 清參閱第七圖所示，其係為第六A圖至第六c圖的亮 度比較圖，®中為餘目前市面量產新式的32 4的背光模 組之其中77 4戸、截面輝度分佈，此模組約使用12根燈管， 與傳統的f2賴組使用16根燈管而言，已明顯減少燈管 數目達成節能的效果’但相對的減少燈管數目會使燈管盥 燈管的間距變大，所以MURA問題會變的报嚴重，此架構 仍使用3張擴散膜片，而移除掉任—張擴散㈣都會使 MURA問題出現，此為本發明所比對之前案。第七圖的輝 度分佈圖中起伏的輝度曲_示此圖約有擷取涵蓋 管的範is，測量輝度的儀n為T0PCC)N対的麵 輝度計，以視角1度的量測條件來測量此量產的μ ^ 背光模組，此結果突顯使用前案與本發明案之擴散 分布與輝度均勻性的差異。第六六B、_^ = 的實驗架構都是使用-張擴散板且並未加任;可:: 僅單純比較擴散板之間的差異。由圓中可，欢膜片， 散板結構D2的亮度均勻度及輝度皆優於㈤ 结構D1的亮度均钱及輝度，並且該複合 26 200944840 勺声Ί㈣度又優於5亥複合式擴散板結構Da的亮度均 使用此㈣性已極佳的複合式擴散板， 加3張擴伽切光模組中使用擴散板的後還需要額外增 之單-僅^亮膜來提升均勾性。使用本發明 擴气板伟用用一張擴散膜已經可以達成傳統 擴=，用3張擴散膜時—樣的均句的效果。但由 輝度仍不達背光模組之輝度需求，而增加擴 散膜於本發明的複合式擴度广可以再增加1張擴 紐板上，或其他增紐。而近年 ❹ 紅管的職與LCD面㈣透光㈣錄效率提升血液曰 率增加等因素大幅提升，所以未來輝度需求將^ =越不重要，而均勻性需求會因模組的節能耗電需求盘 旱又變薄的需求而越來越重要。而本發明主要的精神就？ ，決此均勻性需求未來會越來越重要且越來越難達成^ ，。故本發明可以有效降低使用過多張膜片的成本 持極佳的輝度均勻性’因能降低使用的膜片數量並使、 模組的紕裝手續更為精簡並提升組裝時的良率。 然而，上述該等印刷式微型結構透鏡擴散點4〇&的形 狀、尺寸及排列方式只是用來舉例而已，其並非用以限^ 本發明。 综上所述，本發明具有下列諸優點： 1、提供一具有複合功能的擴散板結構，可同時具有 維持光源輝度及提升光線擴散而提升背光模組的均勻ς並 消除MURA問題的功能，並能提供液晶螢幕較大的觀看視 27 200944840 角。 2、另一方面’複合式擴散板結構可 if目互配合而形成-背光模組(亦可增力。S二 曰儿膜）’ M提升背光模組所輸出視覺的均句 、丨 0 3、此外，因為由複合式擴散板結構、發糸二-芬^ 與液晶顯示面板相== 影像品質彳財制能提歧晶_岐所呈現之 詳細說明=逑惟的具體實施例之 以限制本發明，太=明之特破並不侷限於此，並非用 園為準，凡合於之，有範圍應以下述之申請專利範 之實施例，；應請專利範圍之精神與其類似變化 藝者在本發“:本發明之範.中，任何熟悉該項技 蓋在以下本案之專=圍可輕易思及之變化或修飾皆可涵 Ο 【圖式簡單說明】 A圖Ϊ ί本發明液晶顯示器的第-實施例之侧視分解 不葸圖； 顯示器的第一實施例之侧視組合 第一Β圖係為本發明液晶 示圖； 第-A巧為本發明液晶顯示器的第二實施例之侧視分解 不意圖； ^ 园係為本發明液晶顯示器的第二實施例之侧視組合 28 200944840 示圖； 第三A圖係為本發明第一種發光元件的部分排列上視示意 圖； 第三B圖係為本發明配合第一種發光元件所使用之第一種 具有不同網點密度及尺寸的網版之部分上視圖； 第四A圖係為本發明第二種發光元件的部分排列上視示意 圖； 第四B圖係為本發明配合第二種發光元件所使用之第二種 ® 具有不同網點密度及尺寸的網版之部分上視圖； 第五圖係為本發明具有不同形狀、尺寸、密度之印刷式微 型結構透鏡擴散點及微型結構透鏡之部分侧視示意 圖， 第六A圖係為習知只具有透光本體單元之複合式擴散板結 構的示意圖； 第六B圖係為本發明具有透光本體單元及印刷式微型結構 透鏡擴散單元之複合式擴散板結構的示意圖； ❹ 第六C圖係為本發明具有透光本體單元、印刷式微型結構 透鏡擴散單元及微型結構透鏡擴散單元之複合式擴 散板結構的示意圖；以及 第七圖係為第六A圖至第六C圖的亮度比較圖。 【主要元件符號說明】 複合式擴散板結構 Da 透光本體單元 3 a 29 200944840, "eight-J tJ, J back to the township _, the uniform light effect of the diffuse film and the light collecting effect of the enamel film to improve the brightness of the light source. The backlight module mainly provides the liquid crystal display panel _ uniform sentence, and uniform degree. ❹ Generally, light is emitted from a light source through a diffuser, but the directivity of the light emitted by the diffuser is poor. Therefore, the prism sheet must be used to correct the direction of the light. The principle is based on the geometry of the design. The structure makes the light refract and the total reflection to achieve the purpose of condensing light and improving the front luminance. However, the backlight obtained by this method has a small angle of view, because the large-view light converges to a small angle to achieve a party effect. The display number will have a small viewing angle when viewing, that is, the user must view the face at a small angle on the front of the display, otherwise the image played by the display will not be clearly visible. Inconvenience, because of this, there is also a new design that uses a multilayer film interference principle to achieve a polarized light conversion brightness enhancement film (DBEF) to achieve a non-compressed viewing angle and a full-angle brightening design. The LCD TV using the direct-lit backlight module has a plurality of lamps in the backlight module disposed directly in the light box of the backlight module, and the light emitted by the lamp is directly viewed by the human eye, so if only the lamp is placed When entering the light box without evenly designing the light, it can not be used as a backlight. This will cause the backlight to be evenly uneven, and the brightness of the light and dark will change, resulting in so-called tube image and tube unevenness. For MURA), the light source of the direct-lit backlight module is set to 200944840 ίG: ί: ίί 曰 灯 - - - , , 看到 看到 看到 看到 看到 看到 看到 看到 看到 看到 看到 看到 看到 看到 看到 看到 看到 看到 看到 看到 看到 看到 ί 看到 ί ί ί ί ί ί ί ί ί Very low 'construction expansion' f to the new board and multiple diffusion films even with a micro-junction such a uniform backlight module will not cause liquid 2 ==: this r composite diffuser because of the light box, lighting fixtures , Luti (four) Lai group, advertising needs. The diffusing plate of a and the like requires uniform illumination. The inventors of the present invention have been made to have a second invention by feeling that the above-mentioned defects can be improved and the use of the above-mentioned deficiencies. The ten-way and effective improvement of the above-mentioned defects [invention] The expansion of the composite structure to improve the brightness and the viewing angle range: the light source brightness of the light module and the liquid module and enhance the front line 4) = 2, maintain Backlight,,, _ Geng San and then # for LCD display better brightness _ sex and a larger viewing angle. In other words ^ tube or reduce the thickness of the backlight module: month = MURA problem. ^ ^ ^ ^ According to one of the aspects of the present invention, a composite diffuser 200944840 structure is provided, comprising: a light transmissive body unit and a printed microstructure # diffusion unit. The light-transmitting body unit has a light-transmitting main layer, and a plurality of micro-diffusion particles (Μ=〇 diffusion particles) formed inside the light-transmitting main layer, so that the light diffuses in the light-transmitting body unit. Its 0 light-transmissive body has two sides on both sides <Human Glossy and - Glossy. The printing: the micro-structure lens diffusion unit has a plurality of printing microlens diffusion dots formed by printing on the light-incident or light-emitting surface of the light-transmitting body unit. According to one aspect of the present invention, a backlight module is provided, which includes: a reflective, a meta-, a light-emitting single-it, and a composite diffuser structure. The three-dimensional reflective unit has a reflective plate and a reflection A valley space surrounded by the plate and a reflective coating formed on the inner surface of the reflector. The illuminating unit has a plurality of illuminating elements housed in the accommodating space. Further, the composite diffuser structure is disposed above the light emitting unit, and the composite diffuser structure comprises: a light transmitting body unit and a printed microstructure lens diffusing unit. The light-transmitting body unit has a light-transmissive main layer and a plurality of micro-diffusion particles formed inside the light-transmitting main layer to diffuse the light in the light-transmitting body unit. The light-transmitting body unit has a light-incident surface and a light-emitting surface on both sides. The printed micro-structure lens diffusion unit has a plurality of printing micro-distribution lens diffusion dots formed on the light-incident or light-emitting surface of the light-transmitting body unit by a printing method. According to one aspect of the present invention, a liquid crystal display includes: a liquid crystal display panel and a backlight module, and the backlight module is disposed at a lower end of the liquid crystal display panel to provide the liquid crystal display panel. light source. Furthermore, the backlight module comprises: a reflecting unit, a light emitting unit and a composite diffuser structure. Wherein the reflecting unit has a reflecting plate, an accommodating space surrounded by the reflecting plate, and a reflective coating formed on the inner surface of the reflecting plate. The illuminating unit has a plurality of illuminating elements housed in the accommodating space. Therefore, the present invention has the following advantages and effects: 1. The k-battery structure having a composite function can simultaneously have the function of maintaining the brightness of the light source and increasing the diffusion and scattering of the light to improve the uniformity of the backlight module and eliminate the MURA problem. And can provide a larger viewing angle of the LCD screen. . . . 2. In the other aspect, the composite diffuser structure can be combined with the light-emitting unit and the anti-projection unit to form a backlight module (a plurality of diffusion collapse or brightness enhancement films can also be added) to enhance the backlight module. Output visual uniformity quality. 3. In addition, since the #光模块 combined by the composite diffuser structure, the light emitting unit and the reflecting unit can cooperate with the liquid crystal display panel to graze a uniform backlight, the present invention can improve the liquid crystal display panel. The current image quality uniformity. In order to further understand the techniques, means and functions of the present invention for achieving the intended purpose, please refer to the following drawings relating to the present invention, and it is believed that the objects, features and features of the present invention can be entered as 11 200944840 and It is to be understood that the appended claims are not intended to The first embodiment of the present invention provides a liquid crystal display comprising: a liquid crystal display panel L and a backlight module B1 ′ and the backlight module B1 is disposed at a lower end of the liquid crystal display panel L 以 to provide a light source required for the liquid crystal display panel L. In addition, the backlight module B1 includes: a reflective unit, a light-emitting unit 2, a composite diffuser structure m, and three first diffusion films 6 disposed one above the composite diffuser structure D1. a second diffusion 臈7 and a third diffusion film 8. The reflecting unit 1 has a reflecting plate 1 , an accommodating space 11 surrounded by the reflecting plate 10 , and a reflective coating 12 ′ formed on the inner surface of the reflecting plate 10 . The layer 12 is often formed of a film having high reflection characteristics, which is usually attached to the reflector 1 , and there is also a design in which a highly reflective coating is applied to the reflector 1 , wherein The reflector 10 can be constructed as a semi-open structure having a cup-shaped or arbitrarily shaped shape, and is mostly formed of stamped iron or other light metal members. In addition, the reflective coating 12 can be a white coating or a silver coating. The silver coating is mostly a highly reflective material such as aluminum, silver, etc., which can provide high brightness requirements, but has poor diffusion and scattering ability due to a mirror-like surface. The white coating is mostly used for increasing the scattering, and the light is evenly diffused, and the white reflective coating is mostly composed of a high-density diffusion particle or a foamed film. The principle is to utilize the difference of the refraction. Causes high scattering and reflection of light to achieve uniformity 12 200944840 Scattering reflections. In addition, the light-emitting unit 2 has a plurality of light-emitting elements 20 accommodated in the accommodating space 11, and the light-emitting elements 20 can be a plurality of cold cathode lamps (Cold Cathode Fluofeseent Lamps) according to different requirements. 'CCFL', a plurality of light-emitting diodes (LEDs), hot cathode lamps (HCFLs), or any other type of illuminable element. In addition, as can be seen from the first b diagram, the light projected by the light-emitting elements 20 can be directly projected upward or transmitted through the reflection and scattering of the reflective coating 12, and then projected upward, and the above-mentioned white coating is used for the above-mentioned white coating. In order to make the reflected light produce a higher uniformity (Uniformity), the above silver coating is used to make the reflected light produce a higher brightness (Brightness). Further, the composite diffuser structure D1 is disposed above the light-emitting unit 2, wherein the composite diffuser structure d1 includes a light-transmitting body unit 3 and a printed micro-structure lens diffusing unit 4. The light-transmitting body unit 3 has a light-transmissive main layer 30 and a plurality of micro-diffusion particles 31 formed inside the light-transmitting main layer 30. The ruthenium particles are generally a light-transmitting material and a body 30. The refractive index is different, and the larger the refractive index difference, the higher the diffusion ability, and the micro-diffusion particles 31 are generally spherical in shape, and have a long shape, an elliptical shape or the like, or a plurality of different sizes or shapes or materials. Diffusion particles with different refractive indices are mixed. The shape, size, refractive index and distribution density of the diffusion particles affect the diffusion capacity and transmittance of the diffusion plate. And the upper surface and the lower surface of the light-transmissive main layer 3〇 are further provided with a sub-layer (300, 301) having a co-extrusion with the light-transmitting main layer. The light-transmissive sub-layer is often designed according to the process requirements. In general, the thickness of the transparent sub-layer is smaller than that of the transparent main layer, and the thickness of the transparent sub-layers 300 and 301 is about the main light transmission. The layer 3〇 is 5%~30%. If a multi-layer co-extrusion process is adopted, a diffusion plate having more layers of light-transmissive sub-layers 3〇〇 and 3〇1 can be produced. In general, it is also possible to design the diffusing plate of the light-transmitting main layer 30 by designing the light-free sub-layers 3〇〇 and 3〇1. In the process of co-extrusion (c〇_extrusi〇n), Lu, s Xuan transparent sub-layer 300, 301 will mainly add ultraviolet light absorber, which can absorb most of the ultraviolet light, so as to avoid the ultraviolet light emitted by the liquid crystal tube. Long-term J3, ?, shot and know bad or degraded, the light-transmissive sub-layer 3 〇〇 and 3 〇 1 layer are generally ❹ can add some functional auxiliary additives inside, such as anti-UV, fluorescent brightener , antistatic agents, etc. The micro-diffusion particles 31 may also be added to the light-transmissive sub-layers 300 and 301, and only the micro-diffusion particles 31 may be added to the light-transmissive main layer 3, but only to the light-transmissive sub-layer 3〇〇. The micro-diffusion particles 31 may be added to the interior of the 301, that is, the light-transmitting main layer 3A and the light-transmitting sub-layers 3A1, 3〇3. In the single-layer extrusion process, since no light-transmissive sub-layers 300, 301 are disposed on the upper and lower surfaces of the light-transmissive main layer 30, only the ultraviolet absorber or the micro-diffusion particles 31 are added to the light-transmitting main layer. Within 30, the light entrance surface 3〇2 and the light exit surface 3〇3 will be directly disposed on the surface of the light transmitting main layer 30. Furthermore, if the diffusing plate is provided with the light-transmitting sub-layers 3, 301 at the opposite ends of the light-transmitting main layer 30, the light-incident surface 3〇2 and the light-emitting surface 3〇3 are disposed on the light-transmitting pair. Both sides of the layers 300, 301. When the diffusing sub-layers 300 and 301 are not provided, the light-incident surface 3〇2 and the light-emitting surface 3〇3 are directly provided on both side surfaces of the light-transmitting main layer 30. The microstructure lens 5〇 and the printed micro-structure lens diffusion point 40 of the present invention are disposed on the light-incident surface 302 and the light-emitting surface 14 200944840 303, and the material of the light-transmitting main layer 30 and the light-transmitting sub-layer 300, 301 The material may be selected from the group consisting of polycarbonate (Polycarbonate 'PC), polymethylmethacrylate (PMMA), polystyrene (PS), and methacrylic acid acrylate polystyrene (Methylmethacrylate Styrenre, The choice of MS or polypropylene (PP) or other polymeric thermoplastic materials is added in a certain proportion. However, the above materials are merely exemplified by ❼, which is not intended to limit the present invention. In addition, the micro-diffusion particles 31 are 0. A ratio of 001% to 50% is added to the light-transmitting main layer 30 or the light-transmitting sub-layers 300, 301, and an optical refractive index (Refract index) of the micro-diffusion particles 31 in either direction and the light-transmitting main layer The difference in optical refractive index of 30 is between ± 〇〇 2 and ± 〇 5 'the higher the difference in refractive index, the higher the diffusivity. For a new type of diffusing plate having a surface microstructure type having high transmittance characteristics, in order to maintain its characteristic of still penetration, a small amount of particles of the diffusion microparticles 31 are often added to the inside of the light transmitting body unit 3. The light-transmissive main layer 3〇 or the light-transmitting sub-layer 3〇〇, © 301. In addition, the micro-diffusion particles 31 may be polymethylmethacrylate (PMMA), polycarbonate (PC), polyethylene particles (p〇iyStyrene, p|§) or poly = polypropylene (PP) or cerium oxide (Si〇2), Methylmethacrylate Styrenre (MS) or other mixed polymeric materials, and the transparent micro-diffusion particles 31 The particle size system is at 0. Between 1 and 30 micrometers (vm), according to the Mie scattering theory, the particle size variation of the micro-diffusion particles 31 affects the scattering pattern and the scattering angle. However, the enamel of the above-described micro-diffusion particles 31 is for illustrative purposes only and is not intended to limit the invention. In addition, the printed micro-structure lens diffusion unit 4 has a plurality of screen-printing methods for forming a printed micro-structure lens diffusion point formed on the light-incident surface 302 of the light-transmitting body unit 3 (Printing) Microlens diffusion dot) 40, and the upper surface of the printed microstructure lens diffusion point 40 may be a non-spherical surface similar to some micro-convex undulating curved surface, the design of the printed microstructure lens diffusion point 40 size or density distribution It can also be designed as a circular, square, or polygonal distribution of basic constituent elements, or a plurality of different shapes mixed in a certain proportion. The size of the printed micro-structure lens diffusion point 40 is also due to the actual screen printing process. The size and density of the screens of the printing screens are different and slightly different. The process of screen printing and the viscosity of the printing ink materials have an influence on the shape and the final optical characteristics. Generally speaking, the size distribution of the printed micro-structure lens diffusion point 40 is about i〇pm~4mm, and the size and precision of the printed micro-structure lens expansion 40 are limited by the mesh of the screen net. (Mesh) size, more stable screen printing. The processing method 6 〇 聪 ~ imm dot size is better, the printed micro-structure lens diffusion point 4g distribution height is about 2μηι ~ 30μ ΐ η, the preferred printing height 払丨 height will be limited by the ink viscosity during printing, the next Ink volume, scraper speed, blade hardness, mesh mesh, mesh material, mechanical parameters. Printed micro-structured lens diffusion point knives are resin-based mixtures and diffusion particles such as cerium oxide, _ _ to be acid bismuth, thinner, auxiliary additives, etc., generally made of titanium dioxide, sulfur enamel will be different types of oil 16 200944840 ink The process of the printing process is different. The printing micro-diffusion point 40 is formed on the surface of the diffusion plate by the end of the printing process, or the ultraviolet diffusion curing is performed, that is, the printing micro-structure lens diffusion point 40 can be on demand. The light-incident surface 302 or the light-emitting surface 3〇3 of the light-transmitting main unit 3 is disposed. When the diffusion is higher, the two micro-structure lens diffusion points 40 can be disposed on both the light-incident surface 302 and the light-emitting surface 303. a further, the printed microstructure lens above the light-emitting elements 20 is expanded. The arrangement of 40 is more directional than the s. The density of the printed micro-structured lens diffusion dots 40 on the upper side of the element 2 is lower, but the known property still needs to be changed according to the overall mechanism and the diaphragm, and the diffusion point 40 may appear non-monotonous. Incremental or monotonically decreasing size distribution or density distribution state. The distribution and size may vary from large to small, or from small to large. This is due to the use of the diaphragm assembly and the backlight module lamp spacing and the thickness of the module and the diffusion characteristics of the reflector (B s DF), the difference in the size and spacing density of these printed micro-structure lens diffusion points 40 It can be designed and analyzed by optical simulation and adjusted. In the general design architecture, a portion of the printed microstructure lens diffusion point 40 is adjacent to the light-emitting elements 20, and another portion of the printed microstructure lens diffusion point 40 is remote from the light-emitting elements 20, and is adjacent to the The density of the printed micro-structure lens diffusion dots 40 of the light-emitting elements 2〇 is greater than the density of the printed micro-structure lens diffusion points 40 away from the light-emitting elements 20, and of course, it can be designed as a printed micro-structure in addition to the density distribution adjustment. The diameter of the lens diffusion point 40 can vary depending on the position of the tube. The density and size of the printed micro-structure lens diffusion point 40 is a variation of the size 17 200944840. These are all optical design adjustments that can be used. Furthermore, according to the actual design requirements, the first three diffusion films 6, the second diffusion film 7, and the third diffusion film 8 are sequentially arranged on the composite diffusion plate structure D1. a first diffusion film, a second diffusion film, and a '"""Dual Brightness Enhancement Film (DBEF) or a first diffusion film, a second diffusion film, and a super Brightness Enhancement Film (BEF). Of course, depending on the requirements, the number of diffusing films or brightness enhancing films or other novel microstructured optical films can also be increased or decreased. In terms of current cost reduction and Slim design trends, the number of available diaphragms will be reduced as much as possible, and there are also backlight models designed with only two lower diffusion films, but it is known that the lamps are reduced in MURA and brightness. The problem of unevenness can be more severe, and the design of the present invention can reduce the number of diaphragms used and reduce or eliminate MURA problems. Therefore, it can be seen from the arrows of the first B diagram that the reflective coating 12, the printed microstructure lens diffusion dots 4〇, and the micro-diffusion particles 31 ❹ are matched to cause the light-emitting elements 20 to be generated. The light scatters (Scattering), which in turn increases the diffusivity and uniformity of the light that exits the illuminating surface 3〇3. In particular, the present invention uniformly scatters the light-emitting elements 2〇 by the printing microlens diffusion dots 40 formed on the light-incident surface 302 of the light-transmitting main layer 3〇. The strong direct light causes the light generated by the light-emitting element 2 to be scatter-reflected, that is, the brightness of the brighter region above the light-emitting element 2 is lowered. At this time, the light can be printed by the microstructure. The lens diffusion point 18 is further set to reflect the light to the dark band area between the two lamps, so that the brightness of the darker region of the light-emitting element 2G is significantly increased & The strong light above the bright band and its light reflection!_T = The effect above the dark zone between the lamps can reduce the difference between light and dark, and the main principle of MURA is reduced. Therefore, the present invention solves the problem of using the printed micro-structure lens diffusion point 4〇 as the first correction means for performing light-sequence, effectively increasing the light diffusion degree and uniformity. The positive luminance of the touch and the larger viewing angle. ^ Secret If you first pass the printed micro (four) structure of the diffusion point * scattering reflection before entering the diffusion plate (four), the uniformity of the overall backlight module can be significantly improved. However, the present invention utilizes the size, shape, thickness, and density distribution of the printed micro-structure lens diffusion point 40 to finely adjust the light entering the diffusion plate. First, the method has lowered the brightness above the lamp and simultaneously raised the two lamps. The brightness of the dark band between the tubes, so it can already significantly reduce the MURA gap between light and dark. It can be seen that the main function of the printed micro-deformation and structural lens diffusion point 40 is to adjust the uniformity of the light distribution position before the light-transmissive Ο main layer 3 打 and the light-transmissive sub-layers 300, 301 which are driven into the diffusion plate. Conventional direct-diffusion diffuser designs of the prior art are mostly designed using the addition of diffusing particles = diffuser plates or by using diffused plates with microstructures on the surface. Firstly, without the printing micro-structure lens diffusion point 4〇, it is impossible to adjust the uniformity of the light distribution position before the light source light enters the inside of the diffusion plate. Only the sin micro structure can only adjust the direction of the light, and cannot change obviously. The positional distribution of the light. The use of a conventional diffuser will cause the light entering the diffuser to be strong and bright at the beginning of the light, and the dark band between the two tubes is still 19 200944840 • Very dark, so the MURA problem is reported to be serious. This is a composite of the invention. The biggest difference between a diffuser and a conventional diffuser. If the printed micro-structure lens diffusion point 40 is disposed on the light-emitting surface 303, there is also an effect of scattering and softening the strong light emitted by the lamp. However, due to the difference between the light path and the optical path length, in general, The diffusion effect will be slightly lower than when it is placed on the light entrance surface, but the design of the printed microstructure lens diffusion point 40 can be set on the light entrance surface or the light exit surface to be more flexible to match the future light box or the back light module. The design of the organization is used. In the new thin-film or energy-saving backlight module, depending on the size of the mechanism and the supporting steel considerations, the thickness of the diffusion plate is generally about 0. 7~3mm or so, it is very difficult to spread the light in such a thin thickness. Therefore, the conventional diffusing plate increases the thickness of the diffusing plate to increase the number and distance of diffusion, and at this time, if the thickness is increased or decreased. The penetration rate, the amount of excessively added diffusion particles will reach saturation, only the final backlight module brightness will drop more, and MURA can not be eliminated, excessively increasing the number of diffusion particles and increasing the thickness of the plate will increase the cost. , weight increases, thickness increases. However, the present invention uses a printed micro-structure lens diffusion point of only a few μm thick to reduce the thickness and weight of the diffusion plate, and can greatly improve the diffusion capacity of the diffusion plate, and increase the thinning and the reduction of the lamp. Design space for energy backlight module models. Referring to the second and second drawings, which are respectively a side exploded view and a side view combination of the second embodiment of the liquid crystal display of the present invention. As can be seen from the above figures, the greatest difference between the second embodiment of the present invention and the first embodiment is that a composite diffuser structure D2 further includes: a microlens diffusion unit 5 having a complex 20 200944840 The micro-structured lens-breaking structure lens of the light-emitting surface 303 formed on the light-transmitting sub-layer 301 can also be changed from the arrangement of the dimensional structure of the strip-like shape to a two-dimensional matrix array according to the use of the light source. Arranged lens structure, if the micro-structure lens 50 is a one-dimensional strip lens, it is more suitable for a linear light source such as CCFL, jjCFL, etc., and the micro-structure lens 5 When the lens array is arranged, it is more suitable for the use of a point source such as a light emitting diode (LED) light source. In the second embodiment of the present invention, the microstructure of the microstructure lens 50 has a profile of about 100 um and a period of about 2 〇〇um semicircular profile. The semicircular profile extends in a certain direction to form a columnar shape. Lens, generally the processing of such columnar strip microstructures can be formed by diamond knives. Generally, the microstructure of the micro-structured lens has a microstructure depth of about 1 〇 to 4 〇〇 um, and the aspect ratio of the ❹ structure (Aspect) Ratio) are all less than 1. Of course, if the direction of the columnar extension can be changed in different directions when the processing path can be changed, a cylindrical lens extending in a meandering manner like a river can be produced, and the long and narrow columnar shape is distributed. The advantage of the micro-structured lens 5 是 is that the irregularities can eliminate the overlap of regular objects and create the phenomenon of moiré interference. The problem is that the silk often overlaps with the LCD panel. Of course, according to the different backlight and module lamp distance, the backlight mechanism is thick, 4 (5) seeking '' Θ micro-structure lens 5G wheel | jj profile of the composition, can be semi-elliptical, diamond (prism), aspheric (Asph (four) Or any other shape or a mixture of various structures, different degrees of expansion and diffusion capacity of different structures, the design of the module, the thickness, the number of lamps will be better Coordination and uniformity 21 200944840 The reason why the microstructure lens 50 is strip-shaped is (10) original: therefore! The stronger 'dimensional diffusion capacity' will be similar to the line: the source diffuses into a similar surface light source, and the future is more The difference in light source is arranged in an array of Α-form. In the third embodiment of the present invention, such as backlight = LED light source, the microstructure lens at this time uses a circular, Z-angle type, A diffusion lens that has a two-dimensional diffusion capability such as a polygon, that is, a microstructure lens 5G, can be modified into a two-dimensional array structure, such as a concave and convex hemisphere type, a concave-convex pyramid type, and a concavo-convex shape. Physical fitness, etc. An axisymmetric light source uniformly diffuses its light in all directions. Thus, a composite new plate having a two-dimensional microstructured body and then a printed microstructure lens diffusion point 40 can provide a backlight module. In the fourth embodiment, a CCFL (five) rotating surface composite light source similar to the LE point point light source and the class (10) money can be simultaneously used, and the micro structure lens 50 can be simultaneously arranged in a one-dimensional column or two-dimensional array and matched with -dimensional or The two-dimensionally distributed printed microstructure lens has a diffusion point of 4 〇 to form a composite diffuser. © The light path arrow of the second B diagram shows that light passes through the reflective coating 12 and the printed microstructure lens diffusion points. The micro-diffusion particles 31 and the distal micro-structured lens 5 are matched to cause the light generated by the light-emitting element 2 to scatter, thereby increasing the diffusion and uniformity of the light passing through the light-emitting surface 303. In particular, the present invention disperses through the printing microlens diffusion dot 40 formed on the light incident surface 302 of the transparent body unit 3 Reflecting the light rays directly incident upwardly from the light-emitting elements 20, causing the light generated by the light-emitting elements 2, such as 22 200944840, to scatter, that is, reducing the brightness of the brighter regions above the light-emitting elements 20, and The brightness of the darker region between the side lamps of the light-emitting elements 20 is increased. Therefore, the present invention solves the source mode by using the printed micro-structure lens diffusion points 4〇 for the first-time direct light of the tube. Homogenization, effectively increasing the light diffusivity and uniformity, thereby providing a better forward luminance and a larger viewing angle of the liquid crystal display. Please refer to the third and third B drawings for the damage. BRIEF DESCRIPTION OF THE DRAWINGS A partial top view of a first type of light-emitting element of the invention, and a partial top view of a screen of the first type of dot density and size having different screens used in conjunction with the first type of light-emitting element of the present invention. As can be seen from the above figures, the plurality of light-emitting elements 2a used in the first embodiment and the second embodiment of the present invention are Cold Cathode Fluorescent Lamps (CCFL), the first embodiment and the second embodiment. The printed micro-structure lens diffusion dots 4 in the embodiment may be a plurality of screen-printed micro-structure lens diffusion layers formed on the light-incident surface 302 of a transparent body unit 3 through a screen S1 ( Screen printing ❹ microlens diffusion layer), wherein the halftone dots N1 of the screen si have different densities and sizes, and it is common that the dots or sizes of the dots N1 close to the light-emitting elements 2〇a are farther away from the light-emitting elements 2〇a. The density or size of the dot Ni is large. In other words, the density of the dot N1 is related to the position of the light-emitting elements 20a. When the ink of the printed micro-structure lens diffusion dots 40 passes through the halftone N1 of the screen si, the light-transmitting body unit is formed. When the front face 302 of 3 (as shown in the first B or the figure), the closer to the printed micro-structure lens diffusion point 4 of the light-emitting elements 20a, the greater the density or size (i.e., the closer) The higher the dot density or size of the light-emitting elements is). Please refer to FIG. 4A and FIG. 4b, which are respectively a partial arrangement diagram of the first type of light-emitting element of the present invention, and a second type of dot density used by the second light-emitting element of the present invention. And a partial view of the size of the screen. As can be seen from the above figures, if the plurality of light-emitting elements 2〇b used in the third embodiment of the present invention are light-emitting diodes, the printed-type microstructure lens diffusion points 4 in the third embodiment may be plural a geffen printing microlens diffusion layer formed on a light incident surface 3〇2 on both sides of a transparent body unit 3 through a screen S2, wherein the screen is S2 The dot N2 design has different densities and sizes, and the size and density of the dots N2 after the printing process determine the size and density of the printed microstructure lens diffusion dots 40. The density and size of the dots N2 near the light-emitting elements 20b are larger than the density of the dots N2 away from the light-emitting elements 20b. In other words, the density and size of the dot N2 are related to the positions of the light-emitting elements 20b, and the printing ink is printed on the light-incident surface 302 by printing through the ink-permeable dots N2 of different sizes and densities on the screen S2. The microstructured lens diffusion point 40 (as shown in the first B or second B), the closer the density and size of the printed micro-structure lens diffusion point 40 to the light-emitting elements 20b (i.e., the closer to the The density and size of the halftone dot N2 of the light-emitting element 20b are larger. Referring to the fifth figure, a plurality of printed micro-plastic structure lens diffusion points 40a may also exhibit a non-singular incremental increase or decrease in size distribution or density distribution state, which may be changed from large to small, or from small to small. Large and variable 24 200944840 With the backlight module lamp spacing and module diffusion characteristics, the difference between the size and spacing density of these printed micro-plastic tin40a can be adjusted and optimized by light design and analysis. In addition to the available density ❹ ❹ ❹ ❹ ❹ 10 10 10 10 10 10 10 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜 娜The printed (four) type micro-structure lens diffusion point 4 is disposed outside the light-incident surface 302, and the printed micro-structure lens diffusion point 40a can be disposed on the light-emitting surface 3〇3 i according to the design requirement, so that the reflection scattering diffusion can be achieved. The effect of the uniform diffusion of the whole is also required to match the shape and size of the microstructure lens 50a, and the result is obtained by optical simulation. Alternatively, as shown in Fig. 5, the diffusing plate can be made to illuminate the double-sided surface of the light-incident surface 302 of the main body unit 3 and the light-emitting surface 303 by a printing process to produce a printed micro-plow lens diffusion point 40a. Overall, the composite diffuser of the present invention is micro. The structure of the type structure lens 50a can be set according to the requirements of the backlight type, and can be a hemispherical, aspherical, elliptical, parabolic, hyperbolic, or vine-shaped arbitrary shape combination of one-dimensional long cylindrical lens or two-dimensional arrangement. The array lens array, the printed microstructure lens diffusion point 4〇a may be disposed on the same side or on the different side of the microstructure lens 50a, that is, the microstructure lens diffusion point 4〇a and the microstructure lens 50a may exist simultaneously on the diffusion plate. The light-incident surface 302 or the light-emitting surface 303 of the light-transmitting body unit 3 can achieve the diffusion effect of the present invention in the same optical design. The difference is that the order of the first reflection and the back reflection is different from the optical path, which will cause the overall light distribution. There are differences, but both can achieve a highly diffused effect. 25 200944840 Please refer to the sixth A to sixth c diagrams. The sixth A diagram is a schematic diagram of a composite diffuser structure Da having only the optical body unit 3a. The sixth B diagram is a A schematic diagram of a composite diffuser structure of a light-transmitting body unit 3 and a printed micro-structure lens diffusion unit 4, and a sixth C-picture, the invention has a light-transmitting body unit 3, a printed micro-structure lens diffusion unit το 4 and The intention of the composite diffuser structure D2 of the micro-structure transmissive unit 5 is not intended. Refer to the seventh figure, which is the brightness comparison chart of the sixth A to the sixth c. The о is the 77 4 戸, cross section of the new 32 4 backlight module currently available in the market. Brightness distribution, this module uses about 12 lamps. Compared with the traditional f2 ray group, 16 lamps have significantly reduced the number of lamps to achieve energy saving effect. However, the relative reduction in the number of lamps will cause the lamps to collapse. The spacing of the lamps becomes larger, so the MURA problem will become more serious. This architecture still uses three diffusion diaphragms, and the removal of any-diffusion (four) will cause the MURA problem to appear. This is the comparison of the previous case of the present invention. . The luminance curve of the undulation in the luminance profile of the seventh graph shows that the graph is about the range of the tube, and the meter n for measuring the luminance is the surface luminance meter of T0PCC)N対, measured by the angle of view of 1 degree. The mass-produced μ^ backlight module was measured, and this result highlights the difference in diffusion distribution and luminance uniformity between the use case and the present invention. The experimental framework of the sixth six B, _^ = is to use the - diffusion plate and does not add; can:: Only simply compare the differences between the diffusers. The uniformity and brightness of the brightness of the circle D2, the slab, and the diffuser D2 are better than (5) the brightness and brightness of the structure D1, and the composite 26 200944840 scoop 四 (four) degree is better than the 5 hai composite diffuser The brightness of the structure Da is the same as that of the composite diffuser which has been excellent in (4). After adding the diffuser plate in the 3-expansion-cutting light-cutting module, an additional single-only bright film is needed to improve the uniformity. By using the diffuser of the present invention, it is possible to achieve the conventional expansion method, and the effect of the uniform sentence when using three diffusion films. However, the luminance is still not up to the luminance requirement of the backlight module, and the addition of the diffusion film to the composite expansion of the present invention can be further increased by one additional expansion plate, or other additions. In recent years, the role of the red tube and the LCD surface (four) light transmission (four) recording efficiency to increase the blood rate increase and other factors have greatly increased, so the future luminance demand will be ^ = less important, and the uniformity demand will be due to the module's energy consumption requirements The need for drought and thinning is becoming more and more important. And the main spirit of the invention? Therefore, the need for uniformity will become more and more important in the future and it will become more and more difficult to achieve ^. Therefore, the present invention can effectively reduce the cost of using a plurality of sheets of film and maintain excellent brightness uniformity. </ RTI> The number of membranes used can be reduced, and the assembly procedure of the module can be simplified and the yield during assembly can be improved. However, the shapes, sizes, and arrangements of the above-described printed micro-structure lens diffusion points 4 〇 & are merely exemplary and are not intended to limit the invention. In summary, the present invention has the following advantages: 1. Providing a diffusing plate structure having a composite function, which can simultaneously maintain the brightness of the light source and enhance the diffusion of light, thereby improving the uniformity of the backlight module and eliminating the MURA problem, and Can provide a larger viewing angle of LCD screen 27 200944840. 2. On the other hand, the 'composite diffuser structure can be formed by mutual cooperation. - Backlight module (can also increase the force. S 曰 曰 film) 'M enhances the output of the backlight module. 均0 3 In addition, because of the detailed description of the composite diffuser structure, the hairpin, the liquid crystal display panel, and the liquid crystal display panel, the image quality is reduced. The present invention is not limited to this, and is not limited to the use of the garden. Wherever it is, there should be a scope of application of the following patent application; the spirit of the patent scope should be similar to that of the artist. The present invention ": the invention of the invention. Any change or modification that can be easily conceived in the following cases can be covered. [A brief description of the drawings] A side view of the first embodiment of the liquid crystal display of the present invention The first side view of the first embodiment of the display is a liquid crystal view of the present invention; the first embodiment is a side view of the second embodiment of the liquid crystal display of the present invention; A side view combination of a second embodiment of the liquid crystal display of the present invention 28 200944840; a third diagram is a partial arrangement of the first type of light-emitting elements of the present invention; A top view of a portion of a first type of screen having different dot densities and sizes used in a light-emitting element; a fourth diagram is a schematic view of a partial arrangement of a second type of light-emitting element of the present invention; A second top view of a screen having different dot densities and sizes used in conjunction with the second type of light-emitting element; the fifth figure is a printed micro-structure lens having different shapes, sizes, and densities according to the present invention. A schematic side view of a portion of a scatter and a micro-structured lens, and a sixth schematic view of a composite diffuser structure having only a light-transmissive body unit; and a sixth embodiment of the present invention having a light-transmitting body unit and printing A schematic diagram of a composite diffuser structure of a micro-structured lens diffusing unit; 第六 a sixth C-picture is a composite diffuser structure having a light-transmitting body unit, a printed micro-structure lens diffusing unit, and a micro-structure lens diffusing unit A schematic diagram; and a seventh diagram is a luminance comparison diagram of the sixth to sixth C diagrams. [Main component symbol description] Composite diffuser structure Da Transmissive body unit 3 a 29 200944840
❿ 液晶顯不面板 L 背光模組 B 1 、B 2 反射單元 1 反射板 10 容置空間 11 反射塗層 12 發光單元 2 發光元件 2 0 、2 0 a、2 0 b 複合式擴散板結構 D 1 、D 2 透光本體單元 3 透光主層 3 0 透光副層 3 0 0 透光副層 3 0 1 入光面 3 0 2 出光面 3 0 3 微型擴散顆粒 3 1 印刷式微型結構透鏡擴散單元 4 印刷式微型結構透鏡擴散點 40 、4 0 a 微型結構透鏡擴散單元 5 微型結構透鏡 5 0 、5 0 a 第一擴散膜 6 第二擴散膜 7 第三擴散膜 8 網版 S 1 、S 2 30 200944840液晶 LCD display panel L backlight module B 1 , B 2 reflection unit 1 reflector 10 accommodating space 11 reflective coating 12 illuminating unit 2 illuminating element 2 0 , 2 0 a, 2 0 b composite diffuser structure D 1 , D 2 transparent body unit 3 transparent main layer 3 0 transparent sub-layer 3 0 0 transparent sub-layer 3 0 1 light-in surface 3 0 2 light-emitting surface 3 0 3 micro-diffusion particles 3 1 printed micro-structure lens diffusion Unit 4 Printed Microstructured Lens Diffusion Point 40, 40 a Microstructured Lens Diffusion Unit 5 Microstructured Lens 5 0 , 5 0 a First Diffusion Membrane 6 Second Diffusion Membrane 7 Third Diffusion Membrane 8 Screen S 1 , S 2 30 200944840