1359,289 [0001] [0002] [0003] [0004] 100年11月15日核正替換頁發明說明： 【發明所屬之技術領域】 本發明涉及一種背光模組及其光學板，尤其涉及一種用 於液晶顯示之背光模組及其光學板。 【先前技術】 击於液晶顯示器面板之液晶本身不具發光特性，因而為 達到顯不效果需給液晶顯不器面板提供·-面光源裝·置， 如背光模組。背光模組之作用係向液晶顯示器面板供應 亮度充分且分佈均勻之面光源。 請參見圖1，所示為一種習知之背光模組100，其包括框 架101、反射板102、擴散板103、棱鏡片104及至少一發 光二極體105。框架1〇1包括一底板1011及複數從該底板 1011邊緣向其同一側垂直延伸之側壁1 01 3。底板1011與 複數侧壁1013共同形成一腔體1015。發光二極體105包 括出光部1051與基部1〇53 ’基部1〇53與電路板（未標示） 相連並固定於底板1011。擴散板103與稜鏡片104依次設 置於複數侧壁1013頂部。反射板1〇2為一小框體結構，其 可配置於框架101内部°反射板102之底部開設有與發光 二極體105相對應之通孔（圖未標），發光二極體105之 出光部1 0 51穿過相應通孔。發光二極體105之基部1053 頂持該反射板102 ° 工作時，發光二極體105產生之光線被反射板102反射進 入擴散板103，在擴散板1〇3中被均勻擴散後光線繼續進 入棱鏡片104，在棱鏡片1 之作用下，出射光線發生一 定程度之聚集，使得背光模紐在特定視角範圍内之亮度 096127508 表單編號A0101 第3頁/共28頁 1003419852-0 1359289 [0005] [0006] [0007] [0008] 096127508 100年11月15日核正替換'頁 提高。 然，由於發光二極體105為點光源，其到達擴散板103上 各處之距離大小不相等，位於發光二極體105正上方之擴 散板103單位區域所接受光較多，位於發光極管105四周 之擴散板103單位區域所接受光較少，因此易在發光二極 體105正上方之區域形成亮區，而在其上方之四周區域形 成暗區，影響背光模組10 0之出光均勻性。為此，通常需 在發光二極體105之上方設置反射片106，以控制發光二 極體105正上方之出光量。發光二極體105與反射片106 之搭配設計，可一定程度上減弱發光二極體105正上方之 亮區，惟，背光模組100仍存在出光不均之缺點。 【發明内容】 鑒於上述狀況，有必要提供一種出光均勻之背光模組及 其光學板。 一種光學板，其包括至少一光學板單元，該光學板單元 包括第一表面及與該第一表面相對之第二表面，該第一 表面形成有複數封閉式V型凸起，該第二表面形成有一散 射層，且該第一表面和第二表面中至少一表面開設有至 少一光源容納部，該散射層包括複數凸起，每一凸起呈 一封閉的環狀，且以該至少一光源容納部為中心環繞， 環繞同一光源容納部的複數凸起間隔設置，以在該第二 表面上形成相對該光源容納部對稱且封閉式幾何形狀。 一種光學板，其包括至少一光學板單元，該光學板單元 包括第一表面及與該第一表面相對之第二表面，該第一 表面形成有複數封閉式V型凸起，該第二表面形成有一散 表單编號A0101 第4頁/共28頁 1003419852-0 1359289 I f 100年.11月15日修正替換頁 射層，且該第一表面和第二表面中至少一表面開設有至 少一光源容納部，該.散射層包括複數球面凸起，該複數 球面凸起為沿著圓環形執道間隔分佈，且越遠離光源容 納孔，該球面凸起之直徑越大面積也越大或者為相同大 小之球面凸起沿著圓環形執道間隔分佈，且越遠離光源 容納孔，該球面凸起之排佈密度越大的形態。 [0009] 一種背光模組，其包括框架、擴散板、至少一側光式點 光源及光學板；該框架包括底板及複數從該底板邊緣延 t 伸之相互連接之側壁，該複數側壁與該底板形成一腔體 z ;至少一具有出光部之點光源固定於底板；該擴散板封 蓋該腔體；該光學板設置於該腔體内，其包括至少一光 學板單元，該光學板單元包括第一表面及與該第一表面 相對之第二表面，該第一表面形成有複數封閉式V型凸起 ，該第二表面形成有形成有一散射層，且該第一表面和 第二表面中至少一表面開設有至少一光源容納部，該散 射層包括複數凸起，每一凸起呈一封閉的環狀，且以該 至少一光源容納部為中心環繞，環繞同一光源容納部的 複數凸起間隔設置，以在該第二表面上形成相對該光源 容納部對稱且封閉式幾何形狀。 [0010] 一種背光模組，其包括框架、擴散板、至少一側光式點 光源及光學板；該框架包括底板及複數從該底板邊緣延 伸之相互連接之側壁，該複數側壁與該底板形成一腔體 ;至少一具有出光部之點光源固定於底板；該擴散板封 蓋該腔體；該光學板設置於該腔體内，其包括至少一光 學板單元，該光學板單元包括第一表面及與該第一表面 096127508 . 表單編號A0101 第5頁/共28頁 1003419852-0 1359289 __ 100年11月15日核正替換頁 相對之第二表面，該第一表面形成有複數封閉式V型凸起 ，該第二表面形成有形成有一散射層，且該第一表面和 第二表面中至少一表面開設有至少一光源容納部，該散 射層包括複數球面凸起，該複數球面凸起為沿著圓環形 軌道間隔分佈，且越遠離光源容納礼，該球面凸起之直 徑越大面積也越大或者為相同大小之球面凸起沿著圓環 形執道間隔分佈，且越遠離光源容納孔，該球面凸起之 排佈密度越大的形態。 [0011] 上述背光模組之光學板之光學板單元包括光源容納部與 出光面上之複數封閉式V型凸起以及底面上之散射層，點 光源之出光部容納在光源容納部，從點光源發出之光線 藉由光源容納部之内側壁直接進入光學板内部。由於封 閉式V型凸起具有變化之表面結構，使得光線在光學板内 傳輸至封閉式V型&起時，部分原來在未設置上述光學板 之背光模組内全反射傳播之光線可被封閉式V型凸起調節 後朝向擴散板方向折射出射，從而增加出射光線。進一 步地，由於光學板之底面設置有散射層，部分原來在未 設有散射層之光學板内全反射傳播之光線可被其調節後 從底面出射，在框架之輔助作用下，此部分光線多次折 射後朝向擴散板出射。因此背光模組之光學利用率也將 進一步提高。更進一步地，點光源所發射之光線大部分 於光學板内向四周傳播，點光源被轉變成面光源，從而 縮小了混光距離，即縮小了擴散板與光學板之間之距離 ，因此採用該光學板之背光模組具有厚度小之優點。 【實施方式】 096127508 表單编號A0101 第6頁/共28頁 1003419852-0 [0012] [0012] 1359289 I t 1100年.11月15日 下面將結合附圖及實施例對本發明之背光模組及其光學 板作進一步之詳細說明。 [0013] 請參見圖2 ’所示為本發明較佳實施例一之背光模組200 ，其包括一框架21、一反射板22、一擴散板23、一側光 式點光源25及一光學板20。框架21包括一長方形底板 211及從底板211邊緣向其同一側垂直延伸並相互連接之 四側壁213。該四側壁213與底板211共同形成一腔體217 。擴散板23疊放於複數側壁213之頂部，用於蓋住腔體 217。腔體21 7用於收容點光源25、反射板22及光學板20 等元件。從點光源205發出之光線於腔體217内充分混合 後可經過擴散板23出射。 [0014] 請同時參見圖3至圖5，光學板20為矩形透明板，其包括 一出光面202、一與該出光面202相對之底面203。底面 2 0 3中央開設有光源容納部2 0 4。本實施例中，該光源容 納部204為從底面203貫穿至出光面202之通孔。出光面 202形成有複數以光源容納部2〇4為中心之封閉式ν型凸起 0 20 5，且其相應凸邊相互平行。底面203形成有一散射層 206。 [0015] 本實施例中，該封閉狀V型凸起2〇5為矩形狀，其包括沿X 軸方向或沿Υ軸方向延伸形成之相互連接之四長條狀V型 凸邊。該封閉式V5S}凸起205 —相對侧面之夾角0之較佳 取值範圍為60至120度。相鄰兩封閉式ν型凸起2〇5之相 對應凸邊之間距優選為0.025毫米至2毫米》另，需要說 明如下：封閉式V型凸起205之形狀並不限於矩形環狀， 亦可為其他多邊環狀’如正六邊形封閉式V型凸起。該封 096127508 表單編號Α0101 第7頁/共28頁 1003419852-0 1359289 100年.11月15日核正替換‘頁 閉式V型凸起205亦可不以光源容納部204為中心，但需使 該光源容納部204被該封閉式v型凸起205所包圍。 [0016] 該散射層206包括複數等水準寬度之圓環狀凸起2061，該 複數圓環狀凸2061起以光源容納部2〇4為中心等間距設置 °該散射層206係由擴散油墨固化而成，其包括透明樹脂 和均勻摻雜在透明樹脂中之散射粒子β透明樹脂為擴散 油墨中之清漆固化而成，優選丙烯酸樹脂清漆。散射粒 子以一定比例摻入擴散油墨中，其可選自以下之一種或 多種粒子：二氧化矽顆粒、聚曱基丙烯酸甲酯顆粒和玻 螭微珠等》 [0017] 請再參閱圖2 ’側光式點光源25優選為發光二極體，其包 括一基部253，一固定於基部253上方之出光部251與一 設置於出光部251頂端之反射片255 »點光源25藉由電路 板26連接於底板211。光學板2〇設置在腔體217内，其出 光面202面向擴散板23。點光源25之出光部251容納於光 學板20之光源容納部2〇4内》反射板22開設一對應于點光 源25之通孔（未標示）。該反射板22設置在光學板20底 面203之下方’點光源25之出光部251穿過該反射板22上 之通孔。 [0018] 點光源25從出光部251發出之光線藉由光源容納部204之 内側壁直接進入光學板20内部。藉由改變封閉式V型凸起 205之形狀及夾角0，可使光線在光學板2〇内傳輸至封閉 式V型凸起205時，部分原來在未設有光學板20之背光模 組内全反射傳播之光線可被封閉式V型凸起205調節後沿 特定之方向折射出射，例如將部分光線調節至靠近垂直 096127508 表單编號Α0101 第8頁/共28頁 1003419852-0 1359289 I « 100年.11月15日修正S«頁 '擴散板23方向之正面方向出射’從而增加正面出射之光 線，避免在相鄰之點光源25之間之上方產生暗區，提高 背光模組200之出光均勻性。進一步地，由於光學板2〇之 底面設置有散射層206，部分原來在未設有散射層206之 光學板20内全反射傳播之光線可被其調節後從底面2〇3出 射，在反射板22之輔助作用下，此部分光線多次折射後 朝向擴散板23出射。因此背光模組2〇〇之光學利用率也將 進一步提高。更進一步地，由於採用侧光式點光源25， 點光源25所發射之光線大部分於光學板2〇内向四周傳播 ’因此點光源被轉變成面光源，從而縮小了混光距離， 即縮小了擴散板23與光學板20之間之距離，減小背光模 組2 00之厚度。 [0019] 可以理解：為使得該背光模組200在特定之視角範圍内具 有較高之亮度，在擴散板23之上方還可設置一棱鏡片24 ;為使光束於腔體内均勻混光和提高光線利用率，該反 射板22可進一步包括複數反射側壁223。此外，本實施例 中之反射片255並非點光源25之必要元件，側光式點光源 25可採用其他減少從其頂部出射光束之設計，如於其頂 部塗覆反射層等。 [0020] 另外，當框架21為高反射材料製成或於底板211之表面塗 覆有高反射塗層，以及於該光學板20之底面203及散射層 206表面塗覆有高反射塗層時，本實施例背光模組200之 反射板22可省略。 [0〇21] 請參見圖6，所示為本發明較佳實施例二之光學板3〇 »該 光學板30與較佳實施例一之光學板20相似，其不同在於 096127508 表單編號A0101 第9頁/共28頁 1003419852-0 1359289 100年.11月IS日梭正替 光學板30之出光面302形成有複數以光源容納部304為中 心之圓形封閉式V型凸起305。 [0022] 請參見圖7 ’所示為本發明較佳實施例三之光學板4〇。該 光學板40與較佳實施例一之光學板2〇相似，其不同在於 光學板40之光源容納部404為從底面403向光學板40内部 凹陷之盲孔°採用光學板40之背光模組可搭配一未設反 射疋件之側光式點光源，或者該反射元件可分開設置於 盲孔之頂部。 [0023] 凊參見圖8，所示為本發明較佳實施例四之光學板5〇。該 光學板50與較佳實施例一之光學板20相似，其不同在於 光學板50之相鄰兩封閉式V型凸起緊密連接，且該封閉式 V型凸起505之頂角以及相鄰兩封閉式v型凸起5〇5形成之 底部夾角均被圓角化，分別形成圓角R1和R2。該R1和R2 之圓角之取值範圍優選為大於0且小於或等於1. 1毫米。 被圓角化之封閉式V型凸起505可使出射光束之出射角度 之變化趨於緩和，使採用光學板50之冑光模組之出光均 勻性提高。 [0024] 上述實施例中，光學板20，30，40，50都為一整體結構 °本發明之大尺寸之光學板可由複數上述整體結構之光 學板單70組合而成，或者於每一光學板單元開設複數光 源容納部而成°光學板20，30，40，50之形狀除了為矩 形外，還可為多邊形或圓形等。 本發明之光學板單元或組合光學板可設置複數光源容納 部，配合該複數光源容納部，可採用不同顏色之側光式 096127508 表單編號A0101 第10買/共28頁 1003419852-0 [0025] 1359289 100年.11月15日修正替換頁 發光二極體製成白光混光背光模組，或者採用相同顏色 之側光式發光二極體製成特定顏色之背光模組。 [0026] 需要重點指出的是：本發明光學板也可於底面上形成複 數封閉式V型凸起，於出光面相應形成一散射層。因此， 如果將光學板形成有複數封閉式V型凸起之表面定義為第 一表面，形成有散射層之表面定義為第二表面，則當光 源容納部為通孔時，本發明光學板之第一表面或第二表 面均可作為出光面；當光源容納部為盲孔時，本發明光 學板之第一表面和第二表面中設置盲孔之一表面作為底 面，第一表面和第二表面中之另一表面作為出光面。 [0027] 上述實施例中光學板20，30，40，50之散射層在底面上 之分佈還可以有以下變換設計以進一步提高光學板之光 學均勻性。 [0028] 如圖9所示，該散射層包括複數圓環狀凸起6061，該複數 圓環狀凸起6061均以光源容納部604為中心等間距設置， 且越遠離光源容納部604，該圓環狀凸起之徑向寬度越大 〇 [0029] 如圖10所示，該散射層包括複數矩形封閉式凸起7061， 該複數矩形封閉式凸起7061以光源容納部704為中心設置 ，且相鄰矩形封閉式凸起7061之間距相等，但越遠離光 源容納部604，該矩形封閉式凸起7061之凸邊之寬度越大 〇 [0030] 如圖11所示.，該散射層包括複數圓環狀凸起8061，該複 數圓環狀凸起8061之徑向寬度相等，且均以光源容納部 096127508 表單編號A0101 第11頁/共28頁 1003419852-0 1359289 100年.11月15日修正替換頁 804為中心間隔設置，但越遠離光源容納部804，相鄰圓 環狀凸起8061之間距越小。 [0031] 如圖12所示，該散射層包括複數矩形封閉式凸起9061， 該複數矩形封閉式凸起9061均以光源容納部904為中心間 隔設置，且該複數矩形封閉式凸起9061之相應凸邊之寬 度相等，但越遠離光源容納部904，相鄰矩形封閉式凸起 9061之間距越小。 [0032] 如圖13所示，該散射層包括複數球面凸起1061，該複數 球面凸起1061以光源容納部1 004為中心沿著圓環形執道 間隔設置，且越遠離光源容納部1 004，球面凸起1061之 直徑越大面積也越大。 .1359, 289 [0001] [0002] [0003] [0004] [November 15, 100] Nuclear replacement page Description of the Invention: [Technical Field] The present invention relates to a backlight module and an optical plate thereof, and more particularly to A backlight module for liquid crystal display and an optical plate thereof. [Prior Art] The liquid crystal hitting the liquid crystal display panel itself has no illuminating property, so that it is necessary to provide a liquid crystal display panel, such as a backlight module, in order to achieve a remarkable effect. The function of the backlight module is to supply a surface light source with sufficient brightness and uniform distribution to the liquid crystal display panel. Referring to FIG. 1, a conventional backlight module 100 includes a frame 101, a reflector 102, a diffuser 103, a prism sheet 104, and at least one light-emitting diode 105. The frame 101 includes a bottom plate 1011 and a plurality of side walls 1011 extending perpendicularly from the edge of the bottom plate 1011 toward the same side thereof. The bottom plate 1011 and the plurality of side walls 1013 together form a cavity 1015. The light-emitting diode 105 includes a light-emitting portion 1051 and a base portion 〇53' base portion 〇53 connected to a circuit board (not shown) and fixed to the bottom plate 1011. The diffusion plate 103 and the cymbal 104 are sequentially disposed on top of the plurality of side walls 1013. The reflecting plate 1〇2 is a small frame structure, which can be disposed inside the frame 101. The bottom of the reflecting plate 102 is provided with a through hole corresponding to the light emitting diode 105 (not labeled), and the light emitting diode 105 is The light exiting portion 1 0 51 passes through the corresponding through hole. When the base 1053 of the LED 105 is held by the reflector 102°, the light generated by the LED 105 is reflected by the reflector 102 into the diffusion plate 103, and the light is continuously diffused after being uniformly diffused in the diffusion plate 1〇3. The prism sheet 104, under the action of the prism sheet 1, the emitted light is concentrated to a certain extent, so that the brightness of the backlight module in a specific viewing angle range is 096127508. Form No. A0101 Page 3 / Total 28 Page 1003419852-0 1359289 [0005] [ 0006] [0007] [0008] 096127508 November 15, 100 nuclear replacement 'page improvement. However, since the light-emitting diode 105 is a point light source, the distances reaching the diffusing plate 103 are not equal, and the diffusing plate 103 located directly above the light-emitting diode 105 receives more light, and is located in the light-emitting diode. The 105-difference diffusion plate 103 unit area receives less light, so it is easy to form a bright area in the area directly above the light-emitting diode 105, and a dark area is formed in the upper area of the light-emitting diode 105, which affects the uniform light output of the backlight module 100. Sex. For this reason, it is usually necessary to provide a reflection sheet 106 above the light-emitting diode 105 to control the amount of light emitted directly above the light-emitting diode 105. The design of the light-emitting diode 105 and the reflective sheet 106 can weaken the bright area directly above the light-emitting diode 105 to some extent. However, the backlight module 100 still has the disadvantage of uneven light emission. SUMMARY OF THE INVENTION In view of the above circumstances, it is necessary to provide a backlight module having uniform light emission and an optical plate thereof. An optical plate comprising at least one optical plate unit, the optical plate unit comprising a first surface and a second surface opposite the first surface, the first surface being formed with a plurality of closed V-shaped protrusions, the second surface Forming a scattering layer, and at least one surface of the first surface and the second surface is provided with at least one light source receiving portion, the scattering layer includes a plurality of protrusions, each of the protrusions has a closed annular shape, and the at least one The light source receiving portion is centered around, and a plurality of protrusions surrounding the same light source receiving portion are spaced apart to form a symmetric and closed geometry on the second surface with respect to the light source receiving portion. An optical plate comprising at least one optical plate unit, the optical plate unit comprising a first surface and a second surface opposite the first surface, the first surface being formed with a plurality of closed V-shaped protrusions, the second surface Formed with a form number A0101 page 4 / 28 pages 1003419852-0 1359289 I f 100 years. November 15 modified replacement page shot layer, and at least one of the first surface and the second surface is provided with at least one a light source receiving portion, the scattering layer includes a plurality of spherical protrusions, and the plurality of spherical protrusions are distributed along the circumference of the circular path, and the farther away from the light source receiving hole, the larger the diameter of the spherical protrusion is, or the larger the area The spherical protrusions of the same size are distributed along the circular orbital path, and the farther away from the light source receiving hole, the larger the arrangement density of the spherical protrusions. [0009] A backlight module includes a frame, a diffusing plate, at least one side light point source, and an optical plate; the frame includes a bottom plate and a plurality of interconnecting sidewalls extending from an edge of the bottom plate, the plurality of sidewalls and the bottom plate Forming a cavity z; at least one point source having a light exiting portion is fixed to the bottom plate; the diffusing plate covers the cavity; the optical plate is disposed in the cavity, and includes at least one optical plate unit, the optical plate unit includes a first surface and a second surface opposite to the first surface, the first surface is formed with a plurality of closed V-shaped protrusions, the second surface is formed with a scattering layer formed therein, and the first surface and the second surface are At least one surface is provided with at least one light source receiving portion, the scattering layer includes a plurality of protrusions, each of the protrusions has a closed annular shape, and is surrounded by the at least one light source receiving portion, and surrounds the plurality of convex portions of the same light source receiving portion A spacing is provided to form a symmetrical and closed geometry on the second surface relative to the light source receiving portion. [0010] A backlight module includes a frame, a diffusion plate, at least one side light point source, and an optical plate; the frame includes a bottom plate and a plurality of interconnecting sidewalls extending from an edge of the bottom plate, the plurality of sidewalls forming the sidewall and the bottom plate a cavity; at least one point source having a light exiting portion is fixed to the bottom plate; the diffuser plate covers the cavity; the optical plate is disposed in the cavity, and includes at least one optical plate unit, the optical plate unit includes the first The surface and the first surface 096127508. Form No. A0101 Page 5 / 28 pages 1003419852-0 1359289 __ November 15th, 100th of the replacement of the second surface opposite the page, the first surface is formed with a plurality of closed V a type of protrusion, the second surface is formed with a scattering layer, and at least one surface of the first surface and the second surface is provided with at least one light source receiving portion, the scattering layer includes a plurality of spherical protrusions, and the plurality of spherical protrusions In order to be distributed along the circular orbital track, and the farther away from the light source, the larger the diameter of the spherical protrusion is, the larger the area is, or the spherical protrusion of the same size is spaced along the circular path. The distribution, and the farther away from the light source accommodating hole, the larger the arrangement density of the spherical protrusion. [0011] The optical plate unit of the optical plate of the backlight module includes a plurality of closed V-shaped protrusions on the light-emitting receiving portion and the light-emitting surface, and a scattering layer on the bottom surface, and the light-emitting portion of the point light source is accommodated in the light source receiving portion, from the point The light emitted by the light source directly enters the inside of the optical plate through the inner side wall of the light source receiving portion. Since the closed V-shaped projection has a varying surface structure, the light is transmitted through the optical plate to the closed V-type & the part of the original light that is totally reflected in the backlight module without the optical plate can be The closed V-shaped projection is refracted toward the diffuser plate to increase the outgoing light. Further, since the bottom surface of the optical plate is provided with a scattering layer, a part of the light that has been totally reflected and propagated in the optical plate not provided with the scattering layer can be adjusted and then emitted from the bottom surface, and the part of the light is assisted by the frame. After the secondary refraction, it is emitted toward the diffusion plate. Therefore, the optical utilization of the backlight module will be further improved. Further, most of the light emitted by the point source propagates around the optical plate, and the point source is converted into a surface light source, thereby reducing the light mixing distance, that is, reducing the distance between the diffusion plate and the optical plate, so The backlight module of the optical plate has the advantage of small thickness. [Embodiment] 096127508 Form No. A0101 Page 6 / Total 28 Page 1003419852-0 [0012] 1359289 I t 1100. November 15 The backlight module of the present invention will be described below with reference to the accompanying drawings and embodiments. The optical plate is further described in detail. 2 is a backlight module 200 according to a preferred embodiment of the present invention, which includes a frame 21, a reflector 22, a diffuser 23, a side light source 25, and an optical device. Board 20. The frame 21 includes a rectangular bottom plate 211 and four side walls 213 extending perpendicularly from the edge of the bottom plate 211 toward the same side and connected to each other. The four side walls 213 and the bottom plate 211 together form a cavity 217. A diffuser plate 23 is stacked on top of the plurality of side walls 213 for covering the cavity 217. The cavity 21 7 is for accommodating elements such as the point light source 25, the reflection plate 22, and the optical plate 20. The light emitted from the point light source 205 is sufficiently mixed in the cavity 217 to be emitted through the diffusion plate 23. 3 to FIG. 5, the optical plate 20 is a rectangular transparent plate, and includes a light emitting surface 202 and a bottom surface 203 opposite to the light emitting surface 202. A light source housing portion 2 0 4 is opened in the center of the bottom surface 2 0 3 . In the embodiment, the light source accommodating portion 204 is a through hole penetrating from the bottom surface 203 to the light exit surface 202. The light-emitting surface 202 is formed with a plurality of closed type v-shaped protrusions 0 20 5 centered on the light source housing portion 2〇4, and their respective convex sides are parallel to each other. The bottom surface 203 is formed with a scattering layer 206. [0015] In the embodiment, the closed V-shaped projections 2〇5 are rectangular in shape, and include four elongated V-shaped flanges which are formed to extend in the X-axis direction or in the z-axis direction. Preferably, the closed V5S} protrusion 205 - the angle 0 of the opposite side ranges from 60 to 120 degrees. The distance between the corresponding convex edges of the adjacent two closed type v-shaped protrusions 2〇5 is preferably 0.025 mm to 2 mm. In addition, it should be noted that the shape of the closed V-shaped protrusion 205 is not limited to a rectangular ring shape. It can be other polygonal rings such as regular hexagonal closed V-shaped projections. The seal 096127508 Form No. 101 0101 Page 7 / 28 pages 1003419852-0 1359289 100 years. November 15th, the replacement of the 'closed V-shaped protrusion 205 may not be centered on the light source receiving portion 204, but the light source is required The receiving portion 204 is surrounded by the closed v-shaped projection 205. [0016] The scattering layer 206 includes a plurality of annular protrusions 2061 of a horizontal width, and the plurality of annular protrusions 2061 are equally spaced around the light source receiving portion 2〇4. The scattering layer 206 is cured by diffusion ink. The transparent resin and the scattering particles β-transparent resin uniformly doped in the transparent resin are cured by varnish in the diffusion ink, preferably an acrylic resin varnish. The scattering particles are incorporated into the diffusion ink in a certain ratio, which may be selected from one or more of the following particles: cerium oxide particles, polymethyl methacrylate particles, and glass beads, etc. [0017] Please refer to FIG. 2 ' The edge light source 25 is preferably a light emitting diode, and includes a base portion 253, a light exit portion 251 fixed above the base portion 253, and a reflective sheet 255 disposed at the top end of the light exit portion 251. The point light source 25 is provided by the circuit board 26. Connected to the bottom plate 211. The optical plate 2 is disposed in the cavity 217 with its light exit surface 202 facing the diffuser plate 23. The light exiting portion 251 of the point light source 25 is housed in the light source housing portion 2A4 of the optical plate 20. The reflecting plate 22 defines a through hole (not shown) corresponding to the point light source 25. The reflector 22 is disposed below the bottom surface 203 of the optical plate 20. The light exit portion 251 of the point source 25 passes through the through hole in the reflector 22. [0018] The light emitted from the light exit portion 251 by the point light source 25 directly enters the inside of the optical plate 20 through the inner side wall of the light source accommodating portion 204. By changing the shape and the angle 0 of the closed V-shaped projection 205, the light can be transmitted to the closed V-shaped projection 205 in the optical plate 2, and the portion is originally in the backlight module without the optical plate 20. The total reflected light can be refracted by the closed V-shaped projection 205 and refracted in a specific direction, for example, the partial light is adjusted to be close to the vertical 096127508. Form No. 101 0101 Page 8 / Total 28 Page 1003419852-0 1359289 I « 100 On November 15th, the S« page 'reflection in the direction of the front of the diffuser plate 23' is corrected to increase the light emitted from the front side, avoiding dark areas above the adjacent point light sources 25, and improving the light output of the backlight module 200. Uniformity. Further, since the bottom surface of the optical plate 2 is provided with a scattering layer 206, a portion of the light that has been totally reflected and propagated in the optical plate 20 not provided with the scattering layer 206 can be adjusted and then emitted from the bottom surface 2〇3, in the reflecting plate. Under the auxiliary action of 22, this part of the light is refracted multiple times and then emitted toward the diffusion plate 23. Therefore, the optical utilization of the backlight module 2 will be further improved. Further, since the edge light source 25 is used, most of the light emitted by the point source 25 propagates around the optical plate 2', so that the point source is converted into a surface source, thereby reducing the light mixing distance, that is, shrinking. The distance between the diffusion plate 23 and the optical plate 20 reduces the thickness of the backlight module 200. [0019] It can be understood that in order to make the backlight module 200 have a high brightness in a specific viewing angle range, a prism sheet 24 may be disposed above the diffusion plate 23; in order to uniformly mix the light beam in the cavity and To increase light utilization, the reflector 22 can further include a plurality of reflective sidewalls 223. In addition, the reflective sheet 255 in this embodiment is not an essential component of the point source 25, and the edge-lit point source 25 may be of other design that reduces the emission of light from its top, such as a reflective layer applied to its top. [0020] In addition, when the frame 21 is made of a highly reflective material or coated with a highly reflective coating on the surface of the bottom plate 211, and the surface of the bottom surface 203 and the scattering layer 206 of the optical plate 20 is coated with a highly reflective coating. The reflector 22 of the backlight module 200 of this embodiment can be omitted. [0〇21] Referring to FIG. 6, there is shown an optical plate 3 of the preferred embodiment of the present invention. The optical plate 30 is similar to the optical plate 20 of the preferred embodiment, and the difference is 096127508 Form No. A0101. 9 pages/total 28 pages 1003419852-0 1359289 100 years. In November, the IS-Japan shuttle is formed with a plurality of circular closed V-shaped projections 305 centered on the light source housing portion 304. [0022] Referring to FIG. 7 ′, an optical plate 4〇 according to a third embodiment of the present invention is shown. The optical plate 40 is similar to the optical plate 2A of the first embodiment except that the light source receiving portion 404 of the optical plate 40 is a blind hole that is recessed from the bottom surface 403 toward the inside of the optical plate 40. The backlight module of the optical plate 40 is used. It can be combined with an edge-light point source without a reflective element, or the reflective element can be placed separately on top of the blind hole. [0023] Referring to FIG. 8, there is shown an optical plate 5 of a preferred embodiment of the present invention. The optical plate 50 is similar to the optical plate 20 of the first embodiment except that adjacent two closed V-shaped projections of the optical plate 50 are closely connected, and the apex angle of the closed V-shaped projection 505 and adjacent The bottom corners formed by the two closed v-shaped projections 5〇5 are rounded to form rounded corners R1 and R2, respectively. 1毫米。 The range of the R1 and R2 is preferably greater than 0 and less than or equal to 1.1 mm. The rounded V-shaped projection 505 can reduce the variation in the exit angle of the outgoing beam, and the uniformity of the light output from the calender module using the optical plate 50 is improved. [0024] In the above embodiment, the optical plates 20, 30, 40, 50 are all of a unitary structure. The large-sized optical plate of the present invention may be composed of a plurality of optical plates 30 of the above-mentioned overall structure, or for each optical The plate unit is provided with a plurality of light source accommodating portions. The shape of the optical plates 20, 30, 40, 50 may be polygonal or circular, in addition to being rectangular. The optical plate unit or the combined optical plate of the present invention may be provided with a plurality of light source accommodating portions, and the plurality of light source accommodating portions may be used, and different colors of the side light type 096127508 may be used. Form No. A0101 No. 10 Buy/Total 28 pages 1003419852-0 [0025] 1359289 100 years. On November 15th, the replacement page light-emitting diode is made into a white light-mixing backlight module, or the side-light-emitting diode of the same color is used to make a backlight module of a specific color. It should be noted that the optical plate of the present invention can also form a plurality of closed V-shaped protrusions on the bottom surface, and a scattering layer is formed on the light-emitting surface. Therefore, if the surface on which the optical plate is formed with a plurality of closed V-shaped projections is defined as the first surface, and the surface on which the scattering layer is formed is defined as the second surface, when the light source housing portion is a through hole, the optical sheet of the present invention The first surface or the second surface may serve as a light-emitting surface; when the light source receiving portion is a blind hole, one of the first surface and the second surface of the optical plate of the present invention is provided with a surface of the blind hole as the bottom surface, the first surface and the second surface The other surface in the surface acts as a light exiting surface. [0027] The distribution of the scattering layers of the optical plates 20, 30, 40, 50 on the bottom surface in the above embodiment may also have the following transformation design to further improve the optical uniformity of the optical plates. [0028] As shown in FIG. 9, the scattering layer includes a plurality of annular protrusions 6061. The plurality of annular protrusions 6061 are equally spaced around the light source receiving portion 604, and are further away from the light source receiving portion 604. The radial width of the annular protrusion is larger. [0029] As shown in FIG. 10, the scattering layer includes a plurality of rectangular closed protrusions 7061, and the plurality of rectangular closed protrusions 7061 are centered on the light source receiving portion 704. The distance between adjacent rectangular closed protrusions 7061 is equal, but the farther away from the light source receiving portion 604, the greater the width of the convex edge of the rectangular closed protrusion 7061 is as shown in FIG. 11. The scattering layer includes a plurality of annular protrusions 8061, the plurality of annular protrusions 8061 having the same radial width, and each of the light source receiving portions 096127508 Form No. A0101 Page 11 / Total 28 Page 1003419852-0 1359289 100 years. November 15 The correction replacement page 804 is set to be centered, but the further away from the light source housing portion 804, the smaller the distance between adjacent annular projections 8061. [0031] As shown in FIG. 12, the scattering layer includes a plurality of rectangular closed protrusions 9061, each of which is disposed with the light source receiving portion 904 as a center, and the plurality of rectangular closed protrusions 9061 The widths of the corresponding flanges are equal, but the further away from the light source receiving portion 904, the smaller the distance between adjacent rectangular closed protrusions 9061. [0032] As shown in FIG. 13 , the scattering layer includes a plurality of spherical protrusions 1061 which are disposed along the circumference of the light source accommodating portion 1 004 and are spaced apart from the light source housing portion 1 . 004, the larger the diameter of the spherical protrusion 1061, the larger the area. .
[0033] 如圖14所示，該散射層1106包括複數相同大小之球面凸 起1161，該複數球面凸起11 61均以光源容納部11 04為中 心沿著圓環形軌道間隔設置，且越遠離光源容納部1104 ，球面凸起之排佈密度越大。 [0034] 綜上所述，本發明符合發明專利要件，爰依法提出專利 申請。惟，以上所述者僅為本發明之較佳實施例，舉凡 熟悉本案技藝之人士，在爰依本發明精神所作之等效修 飾或變化，皆應涵蓋於以下之申請專利範圍内。 【圖式簡單說明】 [0035] 圖1係一種現有之背光模組之剖面示意圖。 [0036] 圖2係本發明較佳實施例一之背光模組之剖面示意圖。 [0037] 圖3係圖2所示背光模組之光學板之立體圖。 096127508 表單编號A0101 第12頁/共28頁 1003419852-0 1359289 100年11.月15日修正替換頁 [0038] 圖4係圖3所示光學板沿IV - IV線之剖面示意圖。 [0039] 圖5係圖3所示光學板另一視角之立體圖。 [0040] 圖6係本發明較佳實施例二之光學板之立體圖。 [0041] 圖7係本發明較佳實施例三之光學板之剖面示意圖。 [0042] 圖8係本發明較佳實施例四之光學板之剖面示意圖。 [0043] 圖9至圖14為本發明光學板之散射層之分佈示意圖。 [0044] 【主要元件符號說明】 (本發明） [0045] 光學板：20、30、40、50 [0046] 出光面：202、302 [0047] 底面：203、403 [0048] 光源容納部：204、304、404、604、704、804、904、 1004 、 1104 [0049] 散射層：206 [0050] 圓環狀凸起：2061、6061、8061 [0051] 矩形封閉式凸起：7061、9061 [0052] 球面凸起：1061、1161 [0053] 封閉式V型凸起：205、305、505 [0054] 背光模組：200 [0055] 框架：21 096127508 表單編號A0101 第13頁/共28頁 1003419852-0 1359289 [0056] 底板：211 [0057] 側壁：213 [0058] 腔體：217 [0059] 反射板：22 [0060] 反射側壁：223 [0061] 擴散板：23 [0062] 棱鏡片：24 [0063] 點光源：25 [0064] 發光部：251 [0065] 基部：253 [0066] 基部：253 [0067] 反射片：255 [0068] (習知） [0069] 背光模組：100 [0070] 框架：101 [0071] 底板：1011 [0072] 侧壁：1013 [0073] 腔體：1015 [0074] 反射板：102 096127508 表單编號A0101 第14頁/共28頁 100年.11月15日按正替換頁 1003419852-0 1359289 [0075] [0076] [0077] [0078] [0079] [0080] 擴散板：103 棱鏡片：104 發光二極體：105 出光部：10 51 基部：1053 反射片：106 096127508 表單編號A0101 第15頁/共28頁 100年.11月15日梭正替换頁 1003419852-0[0033] As shown in FIG. 14, the scattering layer 1106 includes a plurality of spherical protrusions 1161 of the same size, and the plurality of spherical protrusions 11 61 are disposed along the circular orbital centering on the light source housing portion 104, and the more Along from the light source housing portion 1104, the arrangement density of the spherical protrusions is larger. [0034] In summary, the present invention complies with the requirements of the invention patent, and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS [0035] FIG. 1 is a schematic cross-sectional view of a conventional backlight module. 2 is a cross-sectional view of a backlight module in accordance with a preferred embodiment of the present invention. 3 is a perspective view of an optical plate of the backlight module shown in FIG. 2. 096127508 Form No. A0101 Page 12 of 28 1003419852-0 1359289 100 Year 11. Month 15 Correction Replacement Page [0038] FIG. 4 is a cross-sectional view of the optical plate of FIG. 3 taken along line IV-IV. 5 is a perspective view of another view of the optical plate shown in FIG. 3. 6 is a perspective view of an optical plate according to a second preferred embodiment of the present invention. 7 is a schematic cross-sectional view of an optical plate according to a third embodiment of the present invention. 8 is a schematic cross-sectional view of an optical plate according to a fourth embodiment of the present invention. 9 to FIG. 14 are schematic diagrams showing the distribution of scattering layers of an optical plate of the present invention. [Main component symbol description] (Invention) [0045] Optical plate: 20, 30, 40, 50 [0046] Light-emitting surface: 202, 302 [0047] Bottom surface: 203, 403 [0048] Light source housing: 204, 304, 404, 604, 704, 804, 904, 1004, 1104 [0049] Scattering layer: 206 [0050] Annular protrusions: 2061, 6061, 8061 [0051] Rectangular closed protrusions: 7061, 9061 [0052] Spherical protrusions: 1061, 1161 [0053] Closed V-shaped protrusions: 205, 305, 505 [0054] Backlight module: 200 [0055] Frame: 21 096127508 Form number A0101 Page 13 of 28 1003419852-0 1359289 [0056] Base plate: 211 [0057] Side wall: 213 [0058] Cavity: 217 [0059] Reflector: 22 [0060] Reflecting sidewall: 223 [0061] Diffuser: 23 [0062] Prism: [0063] Point light source: 25 [0064] Light-emitting portion: 251 [0065] Base portion: 253 [0066] Base portion: 253 [0067] Reflecting sheet: 255 [0068] (Generally known) [0069] Backlight module: 100 [ 0070] Frame: 101 [0071] Base plate: 1011 [0072] Side wall: 1013 [0073] Cavity: 1015 [0074] Reflector: 102 096127508 Form No. A0101 No. 14 / Total 28 pages 100 years. November 15th, according to the replacement page 1003419852-0 1359289 [0075] [0078] [0080] [0080] diffuser: 103 prism sheet: 104 light emitting diode: 105 Light exit: 10 51 Base: 1053 Reflector: 106 096127508 Form number A0101 Page 15 / Total 28 pages 100 years. November 15 shuttle replacement page 1003419852-0