201122665 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明係關於一種背光裝置及其光學板，特別是關於一 種可運用於側光式之背光模組及其光學板。 【先前技術】 [0002] 背光模組（Backlight module)係廣泛應用於平面顯 示器領域，由於液晶本身不發光，必須透過背光模組提 供光源才能使液晶顯像，因而成為平面顯示器不可或缺 的關鍵零組件。一般而言，背光模組分為側光式（Edge Type )以及直下式（ Direct Type )兩種設計。直下式 背光模組係將冷陰極螢光燈管等光源置於模組正下方》 側光式背光模組則是將光源設在光學板側邊，其側邊入 射的光源設計，擁有輕量、薄型、窄框化、低耗電的特 色。側光式背光模組的主要光學元件包含光源反射罩、 光學板、稜鏡片、反射板，及位於棱鏡片上方之擴散片 等光學元件。其中’光學板為側光式背光模組的關鍵零 組件，其主要之功用是將光線由邊緣導向視線方向，故 得其名。為達到高亮度及亮度均勻之要求，光學板之光 學設計就顯的格外的重要，目的是希望藉由光學設計之 手段將集中於邊緣之光線藉由光學板均勻地導到整個視 線所及之處。 [〇〇〇3] 隨著液晶產品對螢幕面積需求的增加、同時必須達到薄 型化的需求，而如何結合側光式背光模組所能達到的薄 型設計’同時具有直下式背光模組適用於大螢幕的光源 分佈，成為一重要的課題，而光學板的設計則是解決此 098146090 表單編號A0101 第3頁/共16頁 0982078608-0 201122665 一課題的關鍵。其目標可歸納於以下兩點：1)在大型螢 幕產生良好的勻光效果，不會有明暗不均的問題；2)產 生足夠的亮度。 [0004] 因此，積極尋求液晶顯示器裡新穎的背光模組之光學板 ，可適用於大型液晶螢幕，並可解決晝面亮暗分佈不均 產生之問題，同時產生足夠的亮度，乃為業界一亟待解 決的議題。 【發明内容】 [0005] 因此，為解決上述問題，本發明提供一種背光模組，包 含有光學板及複數個光源。光學板具有入先面、與入光 面鄰接之底面，以及相對於底面之出光面。底面上設置 有複數個第一光學微結構。光源係設置於對應光學板之 入光面之一側，且光學板上進一步包含有膠體，設置於 入光面上，且一膠體包含有複數個光學折射微粒。 [0006] 因此，本發明之主要目的係提供一種背光模組，由於在 入光面上設置有包含光學折射微粒的膠體，可將光源的 入射光均句分佈至背光模組中，改善光學板光均齊度， 及降低光學板因設置光源所導致的螢火蟲區域（hot spot)狀況。 [0007] 本發明之另一目的在於提供一種光學板，適用於側光式 背光模組。光學板具有側面、與側面鄰接之底面，以及 相對於底面之表面。底面上設置有複數個第一光學微結 構。光學板上進一步包含有膠體，設置於侧面上，且膠 體包含有複數個光學折射微粒。 098146090 表單編號A0101 第4頁/共16頁 0982078608-0 201122665 【實施方式】 [0008] 由於本發明係揭露一種背光模組及其光學板，其中所 利用之光學原理與背光模組製程，已為相關技術領域具 ' 有通常知識者所能明瞭，故以下文中之說明，不再作完 整描述。同時，以下文中所對照之圖式，係表達與本發 明特徵有關之示意，並未亦不需要依據實際情形完整繪 製，合先敘明。 請參考第1A圖，第1A圖為本發明第一較佳實施例背光模 組爆炸示意圖。背光模組1包含有光學板11及複數個光源 〇 12。光學板11具有入光面111、與入光面111鄰接之底面 112，以及相對於底面112之出光面113。底面112上設置 有複數個第一光學微結構114。第一光學微結構114的型 態包括但不限於網點、V形溝、或U形溝等。複數個光源 12則設置於對應光學板11之入光面111的一側。光源12 可以是發光二極體或是小燈泡等。光學板11可為平面式 ，或為楔形。另外，背光模組1之中又可進一步包含有擴 散片13、增亮膜14，以增進背光模組1的發光效率與勻光 Ο 效果。 本發明所提供之背光模組1的特徵在於光學板11上進一步 包含有膠體115，並設置於入光面111上，此外，膠體 115之中可具有複數個光學折射微粒。又，依據本發明之 概念，設置於背光模組1之中的膠體115較佳為複數個（ 如第1A圖所示），且各膠體115係塗佈於光學板11的入光 面111上，且塗佈位置係與各光源12對應，或塗佈方式為 ' 各膠體115彼此間隔一預設距離。又，膠體115的材質係 可以墨水混入金屬微粒，或可為高分子材料，其高分子 098146090 表單編號A0101 第5頁/共16頁 0982078608-0 201122665 材料可為壓克力類樹脂、環氧類樹脂、氟類樹脂、石夕類 樹月曰1 ®曰^員樹知、pu類樹脂或前述樹脂之任意組合等 材質為佳。而該光學折射微粒之材質則可為聚酯類樹 脂、壓克力類樹脂、聚烯類樹脂、聚醯胺類樹脂、聚胺 脂類樹脂、無機粒子等材質或前述材質之任意組合為 佳。 此外，為保持光源12的入射光，射入光學板丨丨後能夠均 勻散佈，各膠體115的塗佈面積，以不小於其對應的各光 源12於该入光面π 1之照射面積為佳。此外，膠體j i 5 之總面積可與入光面111之面積相近。 另，請參考第1B圖，在另一種實施狀態中，膠體丨15亦可 以完整覆蓋光學板11的入光面ltl的方式設置；而又以將 膠體115與光學板Π利用雙層射出技術一體成形製作的方 式為更佳。 *月再參考第1C圖，第1C圖為本發明第一較佳實施例背光 模組的上視圖。在光學板11的出光面113靠近入光面lu 的一側1131之處，可進一步設置有複數個第二光學微結 構116，使光源12經膠體115射入光學板11之入光面lu 的入射光能夠更均勻地散佈至光學板11整體。 又，為比較光學板11之入光面111未設置膠體115以及有 設置膠體115兩者之差異，故檢視光均齊度之測量結果。 光學板11之入光面111分別在「未設置」及「有設置」膠 體115的情況下’測量其在出光面113上的不同位置3至】· 等10處的光度，測量結果以光度單位（燭光/平方公尺； cd/m2)表示’並根據測量結果分別計算出兩種測試條件 下的均勻度。 098146090 表單編號A0101 第6頁/共16頁 0982078608-0 201122665 表一：光均齊度測量結果 光度（cd/m2) 均勻度 (%) 位董 a b c d e f 9 h i j 未設置 2347.8 1845.16 2337.32 1893.68 2541.95 1806.32 2384.78 1972.02 2336.39 1789.17 70.39 有設置 2760.19 2460.86 2632.53 2614,49 2965,6 2767.19 2909.84 2810.38 2744.64 3026^9 81.30 [0009] 由上表之結果顯示，在未設置膠體115的情況下，光學板 11之入光面111發光的均勻度為70.39% ;而在有設置膠 體115的情況下，光學板11之入光面111的發光均勻度則 提高至81.30%，顯見設置膠體115確能提昇光學板11之 ^ 入光面111的發光均勻度，改善光學板光度亮暗分佈不均 的情形，並且能降低光學板因設置光源所導致的螢火蟲 區域（hot: spot)狀況。 本發明亦提供第二較佳實施例，為一種'光學板’適用於 側光式背光模組中。請參考第2圖’第2自為本發明第二 較佳實施例示意圖。光學板21具有至少一側面211、與〆 側面211鄰接之底面212，以及相對於底面辑12之表面213 。底面212上設置有複數個第一光学微結構214。第一光 Q 學微結構214的型態包括但木限於網點、V形溝、或u形溝 等。光學板21可為平面式，或為楔形。 特別說明的是，此光學板適用於一侧光式背光模組，而 當運用於侧光式背光模組時，其侧面211為入光面’而 表面213為出光面。 光學板21上進一步包含有膠體215，並設置於侧面211上 ’此外，膠體215之中可具有複數個光學折射微粒。又’ 依據本發明之概念，膠體215較佳為複數個（如第1A圖所 示），且各膠體215係塗佈於光學板21的侧面211上’或 098146090 表單編號A0101 第7頁/共16頁 0982078608Ό 201122665 塗佈方式為各膠體215彼此間隔一預設距離。又，膠體 215的材質係可以墨水混入金屬微粒，或可為高分子材料 ，其高分子材料可為壓克力類樹脂、環氧類樹脂、氟類 樹脂、砍類樹脂、聚醋類樹脂、P U類樹脂或前述樹脂之 任意組合等材質為佳。而光學折射微粒之材質則可為 聚酯類樹脂、壓克力類樹脂、聚烯類樹脂、聚醯胺類樹 脂、聚胺脂類樹脂、無機粒子等材質或前述材質之任意 組合為佳。 此外，在其它實施狀態中（圖未示），膠體亦可以完整覆 蓋光學板的入光面的方式設置；而又以將膠體與光學板 利用雙層射出技術一體成形製作的方式為更佳。 此外，膠體215的設置方式及其製作方式、光學板21之表 面21 3上額外設置複數個第二光學微結構（請參考第1C圖 )等特徵，均與第一較佳實施例大致相同，在此不再重 複贅述。 以上，本發明已藉由各個實施例及其相關圖式而清楚載 明，可由熟習該項技術者據以實施。然而，本發明之各 個實施例在此僅為例示性而非為限制性，亦即，在不脫 離本發明實質精神及範圍之内，上述各個實施例的變化 例及修正例均為本發明所涵蓋。緣此，本發明係由後附 之申請專利範圍所加以界定。 【圖式簡單說明】 [0010] 第1A圖，為本發明第一較佳實施例背光模組爆炸示意圖 〇 [0011] 第1B圖，為本發明第一較佳實施例背光模組另一實施狀 098146090 表單編號A0101 第8頁/共16頁 0982078608-0 201122665 態示意圖。 [0012] 第1C圖，為本發明第一較佳實施例背光模組的上視圖。 [0013] 第2圖，為本發明第二較佳實施例示意圖。 【主要元件符號說明】 [0014] 背光模組1 [0015] 光學板 11、21 [0016] 入光面111BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a backlight device and an optical plate thereof, and more particularly to a backlight module and an optical plate that can be applied to a sidelight type. [Previous Technology] [0002] Backlight module is widely used in the field of flat panel display. Since the liquid crystal itself does not emit light, it is necessary to provide a light source through the backlight module to display the liquid crystal, thus becoming an indispensable key for the flat panel display. Components. In general, the backlight module is divided into two types: Edge Type and Direct Type. The direct-lit backlight module places the light source such as a cold cathode fluorescent tube directly under the module. The side-lit backlight module is a light source designed to have a light source disposed on the side of the optical plate and has a side light incident thereon. , thin, narrow frame, low power consumption features. The main optical components of the edge-lit backlight module include optical components such as a light source reflector, an optical plate, a cymbal, a reflector, and a diffusion sheet located above the prism sheet. Among them, the optical plate is the key component of the edge-lit backlight module, and its main function is to direct the light from the edge to the line of sight, hence its name. In order to achieve high brightness and uniform brightness, the optical design of the optical plate is particularly important. The objective is to use optical design to evenly direct the light at the edge through the optical plate to the entire line of sight. At the office. [〇〇〇3] With the increasing demand for screen area of liquid crystal products, and the need to achieve thinning, how to combine the thin design that can be achieved with the edge-lit backlight module' has a direct-lit backlight module for The distribution of the light source of the large screen has become an important issue, and the design of the optical board is the key to solving the problem of this 098146090 form number A0101 page 3 / page 16 0982078608-0 201122665. The objectives can be summarized in the following two points: 1) producing a good uniformization effect on a large screen without the problem of uneven brightness; 2) producing sufficient brightness. [0004] Therefore, actively seeking an optical plate of a novel backlight module in a liquid crystal display can be applied to a large-sized liquid crystal screen, and can solve the problem of uneven distribution of light and darkness of the facet, and at the same time generate sufficient brightness, which is an industry one. Urgent issues to be resolved. SUMMARY OF THE INVENTION [0005] Therefore, in order to solve the above problems, the present invention provides a backlight module including an optical plate and a plurality of light sources. The optical plate has a front surface, a bottom surface adjacent to the light incident surface, and a light exit surface opposite to the bottom surface. A plurality of first optical microstructures are disposed on the bottom surface. The light source is disposed on one side of the light incident surface of the corresponding optical plate, and the optical plate further comprises a colloid disposed on the light incident surface, and a colloid comprises a plurality of optical refractive particles. [0006] Therefore, the main object of the present invention is to provide a backlight module. Since a colloid containing optical refraction particles is disposed on the light incident surface, the incident light of the light source can be distributed to the backlight module to improve the optical plate. The uniformity of light, and the reduction of the hot spot condition of the optical plate due to the setting of the light source. Another object of the present invention is to provide an optical panel suitable for use in an edge-lit backlight module. The optical plate has a side surface, a bottom surface adjacent to the side surface, and a surface opposite to the bottom surface. A plurality of first optical microstructures are disposed on the bottom surface. The optical plate further comprises a colloid disposed on the side, and the colloid comprises a plurality of optically refractive particles. 098146090 Form No. A0101 Page 4 / Page 16 0982078608-0 201122665 [Embodiment] [0008] The present invention discloses a backlight module and an optical plate thereof, wherein the optical principle and backlight module process used therein have been The relevant technical field is known to those having ordinary knowledge, and therefore, the description below will not be completely described. At the same time, the drawings in the following texts are indicative of the features related to the features of the present invention, and are not required to be completely drawn according to the actual situation. Please refer to FIG. 1A. FIG. 1A is a schematic view showing the explosion of the backlight module according to the first preferred embodiment of the present invention. The backlight module 1 includes an optical plate 11 and a plurality of light sources 〇12. The optical plate 11 has a light incident surface 111, a bottom surface 112 adjacent to the light incident surface 111, and a light exit surface 113 opposite to the bottom surface 112. A plurality of first optical microstructures 114 are disposed on the bottom surface 112. The type of first optical microstructure 114 includes, but is not limited to, dots, V-grooves, or U-shaped grooves, and the like. A plurality of light sources 12 are disposed on one side of the light incident surface 111 of the corresponding optical plate 11. The light source 12 may be a light emitting diode or a small light bulb or the like. The optical plate 11 may be planar or wedge shaped. In addition, the backlight module 1 further includes a diffusion sheet 13 and a brightness enhancement film 14 to enhance the luminous efficiency and the uniform light effect of the backlight module 1. The backlight module 1 of the present invention is characterized in that the optical plate 11 further comprises a colloid 115 and is disposed on the light incident surface 111. Further, the colloid 115 may have a plurality of optical refraction particles. Moreover, in accordance with the concept of the present invention, the colloids 115 disposed in the backlight module 1 are preferably plural (as shown in FIG. 1A), and each colloid 115 is applied to the light incident surface 111 of the optical plate 11. And the coating position corresponds to each light source 12, or the coating method is 'the respective colloids 115 are spaced apart from each other by a predetermined distance. Further, the material of the colloid 115 may be ink mixed with metal particles, or may be a polymer material, and the polymer 098146090 Form No. A0101 Page 5 / Total 16 pages 0982078608-0 201122665 The material may be an acrylic resin or an epoxy resin. A material such as a resin, a fluorine-based resin, a stone sapling tree, a pu-based resin, or any combination of the above resins is preferred. The material of the optical refractive particles may be a polyester resin, an acrylic resin, a polyolefin resin, a polyamide resin, a polyurethane resin, an inorganic particle or the like, or any combination of the foregoing materials. . In addition, in order to maintain the incident light of the light source 12, it can be evenly dispersed after being incident on the optical plate, and the coating area of each colloid 115 is preferably not less than the irradiation area of the corresponding light source 12 on the light incident surface π 1 . . In addition, the total area of the colloid j i 5 may be close to the area of the light incident surface 111. In addition, please refer to FIG. 1B. In another implementation state, the colloidal crucible 15 can also be disposed in such a manner as to completely cover the light-incident surface ltl of the optical plate 11; and the colloid 115 and the optical plate can be integrated by the double-layer injection technology. The method of forming is better. * Referring again to FIG. 1C, FIG. 1C is a top view of the backlight module of the first preferred embodiment of the present invention. A plurality of second optical microstructures 116 may be further disposed at a side 1131 of the light-emitting surface 113 of the optical plate 11 adjacent to the light-incident surface lu, so that the light source 12 is incident on the light-incident surface of the optical plate 11 via the colloid 115. The incident light can be more uniformly spread to the entire optical plate 11. Further, in order to compare the difference between the colloid 115 and the colloid 115 in the light incident surface 111 of the optical plate 11, the measurement results of the uniformity of the light are examined. The light incident surface 111 of the optical plate 11 is 'measured at the different positions 3 to 】 on the light-emitting surface 113 in the case of "not provided" and "provided" colloid 115, and the measurement results are in units of luminosity. (Candle/square meter; cd/m2) means 'and the uniformity under the two test conditions is calculated according to the measurement results. 098146090 Form No. A0101 Page 6 of 16 0982078608-0 201122665 Table 1: Photometric uniformity measurement luminosity (cd/m2) Uniformity (%) Bit Dong abcdef 9 hij Not set 2347.8 1845.16 2337.32 1893.68 2541.95 1806.32 2384.78 1972.02 2336.39 1789.17 70.39 There are settings 2760.19 2460.86 2632.53 2614, 49 2965, 6 2767.19 2909.84 2810.38 2744.64 3026^9 81.30 [0009] As a result of the above table, in the case where the colloid 115 is not provided, the light incident surface 111 of the optical plate 11 emits light. The uniformity is 70.39%; and in the case where the colloid 115 is provided, the uniformity of illumination of the light incident surface 111 of the optical plate 11 is increased to 81.30%, and it is apparent that the setting of the colloid 115 can enhance the optical surface of the optical plate 11. The uniformity of illumination of 111 improves the uneven distribution of light and darkness of the optical plate, and can reduce the hot: spot condition of the optical plate due to the setting of the light source. The present invention also provides a second preferred embodiment for an 'optical plate' for use in an edge-lit backlight module. Please refer to Fig. 2', which is a schematic view of a second preferred embodiment of the present invention. The optical plate 21 has at least one side surface 211, a bottom surface 212 adjacent to the side surface 211, and a surface 213 opposite to the bottom surface 12. A plurality of first optical microstructures 214 are disposed on the bottom surface 212. The type of the first optical Q microstructure 214 includes but the wood is limited to dots, V-grooves, or u-shaped grooves. The optical plate 21 may be planar or wedge shaped. Specifically, the optical plate is suitable for the one-side optical backlight module, and when applied to the edge-lit backlight module, the side surface 211 is the light-incident surface and the surface 213 is the light-emitting surface. The optical plate 21 further includes a colloid 215 and is disposed on the side surface 211. Further, the colloid 215 may have a plurality of optical refractive particles therein. Further, in accordance with the concept of the present invention, the colloids 215 are preferably plural (as shown in FIG. 1A), and each colloid 215 is applied to the side 211 of the optical plate 21' or 098146090. Form No. A0101 Page 7 / Total Page 16 0982078608Ό 201122665 The coating method is such that the colloids 215 are spaced apart from each other by a predetermined distance. Further, the material of the colloid 215 may be ink mixed with metal particles or may be a polymer material, and the polymer material may be an acrylic resin, an epoxy resin, a fluorine resin, a chopped resin, a polyester resin, or the like. A material such as a PU resin or any combination of the above resins is preferred. The material of the optical refractive particles may preferably be a polyester resin, an acrylic resin, a polyolefin resin, a polyamide resin, a polyurethane resin, an inorganic particle or the like, or any combination of the above materials. Further, in other embodiments (not shown), the colloid may be provided in such a manner as to completely cover the light-incident surface of the optical plate, and it is more preferable to integrally form the colloid and the optical plate by double-layer injection technology. In addition, the manner in which the colloid 215 is disposed, the manner in which it is fabricated, and the plurality of second optical microstructures (see FIG. 1C) are additionally provided on the surface 21 of the optical plate 21, and are substantially the same as the first preferred embodiment. The details are not repeated here. The present invention has been clearly described by the various embodiments and the associated drawings, and may be implemented by those skilled in the art. However, the various embodiments of the present invention are intended to be illustrative and not restrictive, that is, the variations and modifications of the various embodiments described above are all in accordance with the present invention. Covered. Accordingly, the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS [0010] FIG. 1A is an exploded view of a backlight module according to a first preferred embodiment of the present invention. FIG. 1B is another embodiment of a backlight module according to a first preferred embodiment of the present invention. Shape 098146090 Form No. A0101 Page 8 / Total 16 Page 0992078608-0 201122665 State diagram. 1C is a top view of a backlight module according to a first preferred embodiment of the present invention. 2 is a schematic view of a second preferred embodiment of the present invention. [Description of Main Component Symbols] [0014] Backlight Module 1 [0015] Optical Plates 11, 21 [0016] Light Entry Surface 111
[0017] 側面 211 [0018] 底面 112、212 [0019] 出光面11 3 [0020] 表面 21 3 [0021] 靠近入光面的一侧1131 [0022] 第一光學微結構114、214 [0023] 膠體 115、215 [0024] 第二光學微結構116 [0025] 光源 1 2 [0026] 擴散片13 [0027] 增亮膜14 0982078608-0 098146090 表單編號A0101 第9頁/共16頁Side surface 211 [0018] bottom surface 112, 212 [0019] light emitting surface 11 3 [0020] surface 21 3 [0021] side 1131 near the light incident surface [0022] first optical microstructures 114, 214 [0023] Colloid 115, 215 [0024] Second Optical Microstructure 116 [0025] Light Source 1 2 [0026] Diffusion Sheet 13 [0027] Brightness Enhancement Film 14 0982078608-0 098146090 Form No. A0101 Page 9 of 16