1338157 [0001] [0002] [0003] [0004] 096117738 099年12月20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—種用 於液晶顯示之背光模組及其光學板。 【先前技術】 由於液晶顯示器面板之液晶本身不具發光特性，因而為 達到顯示效果需給液晶顯示器面板提供一面光源裝置， 如背光模組。背光模組之作用是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 ’所示為一種習知背光模組1〇〇，其包括框架 101、反射板102、擴散板1Q4 '舊鏡片104及至少一發光 二極體105。框架101包括一，底板〗及複數從該底板 1 〇 11邊緣向其同一側垂直延伸之側壁1 〇 1 3。底板1 〇 11與 複數側壁1013共同形成一腔體1〇17 »發光二極體1〇5包 括出光部1051與基部1053 ’基部1053與電路板（未標示） 相連並固定於底板1011 ^掃散板1〇3與稜鏡片1〇4依次設 置於複數側壁1013頂部。反射板102為一小框體結構，其 可配置於框架101内部。反射板1 〇2之底部開設有與發光 二極體105相對應之通孔（未標示），發光二極體1〇5之 出光部1051穿過相應通孔。發光二極體1〇5之基部1〇53 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103中被均勻擴散後光線繼續進 入稜鏡片104 ’在棱鏡片104之作用下，出射光線發生一 定程度之聚集，使得背光模組在特定視角範圍内之亮度 表單編號A0101 第3頁/共21頁 0993453540-0 1338157 099年12月20日修正替換頁 提高 [0005] 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周圍 之擴散板103單位區域所接受光較少，故容易在發光二極 體1 0 5正上方之區域形成党區*而在其上方之周圍區域形 成暗區，影響背光模組100之出光均勻性。另，為達到較 好的光學均勻性，背光模組100中反射板102與擴散板 103之間通常需留有較大的混光空間，故背光模組100存 在厚度較大之缺點。 [0006] 通常，發光二極體105之上；5^設置_友射片106，以控 制發光二極體105正上方變4餐莱二^極體105與反 射片106之搭配設計，可在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仍然存在出光不均 之缺點。 【發明内容】 [0007] 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。 [0008] —種光學板，其包括至少一光學板單元，該光學板單元 包括出光面、與該出光面相對之底面及形成於該出光面 之散射層，該底面形成有複數球面凸起，且開設有光源 容納部。散射層數量為複數，呈間隔分佈，且分佈方式 為如下之一種：該散射層呈環狀，以光源容納部為中心 等間隙間隔分佈，且離光源容納部越遠之環狀散射層之 相應寬度越大；該散射層呈環狀，以光源容納部為中心 096117738 表單編號 A0101 第 4 頁/共 21 頁 0993453540-0 1338157 099年12月20日梭正替换頁 間隔分佈，該複數環狀之散射層之相應寬度相等，且離 光源容納部越遠，相鄰之環狀散射層之排佈越密：該散 射層呈點狀，以光源容納部為中心呈環狀分佈，該複數 點狀之散射層沿遠離光源容納部方向之間距相等，且離 光源容納部越遠，該複數點狀之散射層之面積越大，排 佈密度越小；該散射層呈點狀，以光源容納部為中心呈 環狀分佈，該複數點狀之散射層之面積相等，且離光源 容納部越遠，該複數點狀之散射層之排佈密度越大。 [0009] 一種背光模組，其包括框架、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Itr底核!形成二k體；該至少 •Λ : -%.、 ·.〆.:· .. 一具有出光部之側光式點光源固定於該底板；該光學板 設置於該腔體内，該光學板包括至少一光學板單元，該 光學板單元包括出光面及與該出光面相對之底面，該底 面形成有複數球面凸起，且開設有光源容納部；以及該 光學板還包括形成於該出光面之散射層；該側光式點光 源之出光部相應設置于該光源容納部内。散射層數量為 複數，呈間隔分佈，且分佈方式為如下之一種：該散射 層呈環狀，以光源容納部為中心等間隙間隔分佈，且離 光源容納部越遠之環狀散射層之相應寬度越大；該散射 層呈環狀，以光源容納部為中心間隔分佈，該複數環狀 之散射層之相應寬度相等，且離光源容納部越遠，相鄰 之環狀散射層之排佈越密；該散射層呈點狀，以光源容 納部為中心呈環狀分佈，該複數點狀之散射層沿遠離光 源容納部方向之間距相等，且離光源容納部越遠，該複 096117738 表單編號A0101 第5頁/共21頁 0993453540-0 1338157 099年12月20日修正替換頁 數點狀之散射層之面積越大，排佈密度越小；該散射層 呈點狀，以光源容納部為中心呈環狀分佈，該複數點狀 之散射層之面積相等，且離光源容納部越遠，該複數點 狀之散射層之排佈密度越大。 [0010] 上述背光模組之光學板包括光源容納部、形成于出光面 之散射層、以及形成于底面之複數球面凸起，側光式點 光源之出光部容納于光源容納部。從側光式點光源發出 之光線通過光源容納部之内側壁直接進入光學板内部。 由於光學板之底面設置有複數球面凸起，部分原先在未 φ 設有球面凸起之光學板内全反射之光線可被其調節後從 底面出射，反射後，此部進入散射 層並進一步散射，最後從故背光模 組之光學均勻性及光學利用率進一步提高。更進一步地 ，由於採用側光式點光源，側光式點光源所發射之光線 大部分於光學板内向四周傳播，在光學板之作用下，點 光源被轉變成面光源。故，採用該先f板之背光模組中 不需留有較大的混光空間，背光準組厚度較小。 魯 【實施方式】 [0011] 下面將結合附圖及實施例對本發明之背光模組及其光學 板作進一步詳細說明。 [0012] 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、一側光式點光源25及 一塊光學板20。框架21包括一塊長方形底板211及四個從 底板2 11邊緣向其同一側垂直延伸並相互連接之側壁213 。四側壁213與底板211共同形成一腔體217，用於收容 096117738 表單編號A0101 第6頁/共21頁 0993453540-0 1338.157 099年12月20日核正替換頁 側光式點光源25、反射板22及光學板20等元件。 [0013] 請同時參見圖3至圖5，光學板20呈矩形，其包括一出光 面202、一與出光面202相對之底面203。底面203中心開 設有光源容納部204。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設有散射層205。底面 203形成有位於光源容納部204周圍之複數球面凸起206 。本實施例中，該散射層205以光學板20之中心為中心而 呈圓環狀之分佈于該光源容納部204之周圍。複數圓環狀 之散射層205等間距分佈，且越遠離光源容納部204，圓 環狀之散射層205之徑向寬度越大，此設計有利於提高光 學板之出光均勻性。散射層2D5還可為多邊形。複數球面 凸起206呈矩形之陣列式排佈。每一球面ib起206之球面 半徑R之取值範圍為0. 01毫米至2毫米；每一球面凸起 206之深度之取值範圍為大於0, 01毫米且小於或等於其球 面半徑R。相鄰球面凸起206之間距P之取值範圍為：R/2 SPS4R。本實施例中，每一球面凸起206為半球面凸起 。可以理解，本實施例之光學板20上之球面凸起206之排 佈方式除陣列排佈外還可為陣列間隔排佈、隨機排佈或 相對於光學板單元之中心對稱分佈等。 [0014] 散射層205由擴散油墨固化而成，其包括透明樹脂2052和 均勻摻雜于透明樹脂2052中之散射粒子2054。透明樹脂 2052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2054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 酸甲酯顆粒和玻璃微珠等。 096117738 表單編號A0101 第7頁/共21頁 0993453540-0 -1338157 099年12月20日修正替 [0015] 請再參閱圖2，側光式點光源25優選為側光式發光二極體 ，其包括出光部2 5 1和一設於出光部2 5〗頂部之反射元件 253。出光部251容納於光學板20之光源容納部204内。 光學板20設置在腔體217内，其出光面202面向腔體217 之開口。光學板2 0底面203之下方設置有反射板22。 [0016] 側光式點光源25從出光部251發出之光線通過光源容納部 205之内側壁直接進入光學板20内部。由於光學板20之底 面設置有球面凸起206，部分原來在未設有球面凸起206 之光學板20内全反射傳播之光線可被其調節後從底面203 φ 出射，在框架101之輔助作用下，此部分光線多次折射後 進入散射層205進一步散射開口均勻出 +·*· 〆_/ ! 射。故背光模組200之光學.籍七蕭:％提高。更進 一步地，由於採用側光式點光源25，側光式點光源25所 發射之光線大部分於光學板20内向四周傳播，點光源被 轉變成面光源。故，背光模组200在採用較少之點光源數 量情況下，可進行降低燈箱高度之設計，從而背光模組 200可有效減少成本與降低厚度。 · [0017] 背光模組200還可包括一透明板（圖未示），用於封蓋腔 體217之開口，也可另增加一擴散板（圖未示）或/和一 棱鏡片（圖未示），用於提高該背光模組200在特定之視 角範圍内具有較高之均勻亮度。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。另，本實施例之反射板22可省略，尤其當 框架21為高反射材料製成，或在底板211及/或側壁213 内側塗覆高反射塗層時。另，本實施例中之光源容納部 096117738 表單編號Α0101 第8頁/共21頁 0993453540-0 1338157 099年12月20日核正替換頁 4還可設計為從底面203向光學板30内部凹陷之盲孔， 側光式點光源25之反射片253可設置於出光部251頂部之 光學板20上》 [0018] 請參男阁β . 元圖6，所示為本發明較佳實施例二之光學板3〇。光 予板30與較伎實施例一之光學板20相似，其區別在於光 3〇之散射層305為連續分佈，其完全覆蓋光學板30之 出光面302。 [〇〇9]明參見圖7 ’所示為本發明較佳實施例三之光學板4〇。光 籲 +板4〇與較佳實施例一之光學板2〇相似，其區別在於光 學板40之出光面402之複數方環狀之散射層405之相應寬 度相等，且離光源容納部404.越遠，方環以之散射層405 之排佈密度越大。 [〇〇2〇]可以理解，光學板4〇之複數方環形之散射層405也可等間 距分佈，離光源容納部4〇4越遠，方環形之散射層405之 寬度越大°另，散射層405也可為圓形或除矩形外之其他 φ 多邊形°上述光學板20之複數圓環形之散射層205也可等 向寬度，離光源容納部204越遠，相鄰之圓環形散射層 205之排佈密度越大。 [002U 請參見圖8，所示為本發明較佳實施例四之光學板50 〇光 學板50與較佳實施例一之光學板2〇相似，其不同在於光 學板50之散射層505呈複數相同大小之點狀，複數點狀之 散射層505以光源容納部504為中心成複數等間距之圓環 狀排佈’且越遠離光源容納部5〇4，複數點狀之散射層 505之環向間距越小。本實施例中之散射層505還可呈複 096117738 表單編號Α0101 第9頁/共21頁 0993453540-0 1338157 099年12月20日修正替换頁 數不同大小之點狀，複數點狀之散射層505以光源容納部 5 0 4為中心，且越遠離光源容納部5 0 4，複數點狀之散射 層5 0 5之面積越大且其環向間距越大。可以理解，本實施 例中點狀之散射層5 0 5為圓點狀，其也可為其他點狀，如 矩形點等。另，點狀之散射層505也可呈多邊環狀之排佈 〇 [0022] 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 學板單元組合而成，或者每一光學板單元開設複數光源 < 容納部。除矩形外，光學板20，30，40，50之形狀還可 為多邊形或圓形等。 ％ :顯#;、 [0023] 請參閱圖9，所示為本發明秦I#蘇例、五·之洗學板6 0，其 是由複數光學板單元62組成。每一光學板單元62與較佳 實施例一之光學板20之結構相同。 [0024] 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 < 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。 [0025] 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方式，本 發明之範圍並不以上述實施方式為限，舉凡熟悉本案技 藝之人士，於爰依本案發明精神所作之等效修飾或變化 ，皆應包含於以下之申請專利範圍内。 【圖式簡單說明】 096117738 表單編號A0101 第10頁/共21頁 0993453540-0 1338157 099年12月20日核正替换頁 [0026] 圖1係一種習知背光模組之剖示圖。 [0027] 圖2係本發明較佳實施例一背光模組之剖示圖。 [0028] 圖3係圖2所示背光模組之光學板之立體圖。 [0029] 圖4係圖3所示光學板沿IV-IV線之剖示圖。 [0030] 圖5係圖3所示光學板之另一視角之立體圖。 [0031] 圖6係本發明較佳實施例二光學板之剖示圖。 [0032] 圖7係本發明較佳實施例三光學板之散射層之分佈示意圖 〇 [0033] 圖8係本發明較佳實施例四彩拳板之散射層之分佈示意圖 〇 * [0034] 圖9係本發明較佳實施例五組合光學板之立體分解圖。 【主要元件符號說明】 [0035] (本發明）1338157 [0001] [0003] [0003] [0004] 096117738 December 20, 099 nuclear replacement page invention description: [Technical Field] The present invention relates to a backlight module and an optical plate thereof, particularly A backlight module for liquid crystal display and an optical plate thereof. [Prior Art] Since the liquid crystal of the liquid crystal display panel itself does not have a light-emitting property, it is necessary to provide a light source device such as a backlight module to the liquid crystal display panel in order to achieve the display 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 1A includes a frame 101, a reflector 102, a diffuser plate 1Q4', an old lens 104, and at least one light-emitting diode 105. The frame 101 includes a bottom plate and a plurality of side walls 1 〇 13 extending perpendicularly from the edge of the bottom plate 1 〇 11 to the same side thereof. The bottom plate 1 〇 11 and the plurality of side walls 1013 together form a cavity 1 〇 17 » the light-emitting diode 1 〇 5 includes a light-emitting portion 1051 and a base portion 1053 'the base portion 1053 is connected to the circuit board (not shown) and fixed to the bottom plate 1011 The plates 1〇3 and the crotch sheets 1〇4 are sequentially disposed on the top of the plurality of side walls 1013. The reflecting plate 102 is a small frame structure which can be disposed inside the frame 101. A through hole (not shown) corresponding to the light emitting diode 105 is opened at the bottom of the reflecting plate 1 〇 2, and the light emitting portion 1051 of the light emitting diode 1 穿过 5 passes through the corresponding through hole. The base plate 1 〇 53 of the light-emitting diode 1 顶 5 holds the reflector 102. During operation, the light generated by the LEDs 105 is reflected by the reflector 102 into the diffuser 103. After being uniformly diffused in the diffuser 103, the light continues to enter the fins 104. Under the action of the prisms 104, the emitted light is somewhat affected. The aggregation of the backlight module in a specific viewing angle range Form No. A0101 Page 3 / Total 21 Page 0993453540-0 1338157 December 20, 2010 Correction Replacement Page Increase [0005] However, since the LEDs 105 are The point light sources are different in distance from each other on the diffusing plate 103. The unit area of the diffusing plate 103 located directly above the light emitting diode 105 receives more light, and the diffusing plate 103 is located around the light emitting diode 105. Since the light is received less, it is easy to form the party area* in the area directly above the light-emitting diode 105, and a dark area is formed in the surrounding area above the light-emitting diode, which affects the light uniformity of the backlight module 100. In addition, in order to achieve better optical uniformity, a large light mixing space is usually required between the reflecting plate 102 and the diffusing plate 103 in the backlight module 100, so that the backlight module 100 has a large thickness. [0006] Generally, the light-emitting diode 105 is placed on top of the light-emitting diode 105 to control the design of the light-emitting diode 105 directly above the four-pole body 105 and the reflective sheet 106. To some extent, the bright area directly above the light-emitting diode 105 is weakened. However, the backlight module 100 still has the disadvantage of uneven light output. SUMMARY OF THE INVENTION [0007] In view of the above circumstances, it is necessary to provide a backlight module having uniform light emission and an optical plate thereof. [0008] An optical plate comprising at least one optical plate unit, the optical plate unit comprising a light emitting surface, a bottom surface opposite to the light emitting surface, and a scattering layer formed on the light emitting surface, the bottom surface being formed with a plurality of spherical protrusions And a light source receiving portion is opened. The number of the scattering layers is plural, and is distributed in a spaced manner, and the distribution manner is one of the following: the scattering layer is annular, distributed at a gap interval centering on the light source accommodating portion, and the farther away from the light source accommodating portion is the corresponding annular scattering layer. The width is larger; the scattering layer is annular, centered on the light source housing 096117738 Form No. A0101 Page 4 of 21 0993453540-0 1338157 On December 20, 2008, the shuttle is replacing the page spacing distribution, the plural ring The corresponding widths of the scattering layers are equal, and the further away from the light source accommodating portion, the denser the arrangement of the adjacent annular scattering layers: the scattering layer has a dot shape and is annularly distributed around the light source accommodating portion, the plurality of dots The distance between the scattering layer and the direction away from the light source receiving portion is equal, and the further away from the light source receiving portion, the larger the area of the plurality of dot-shaped scattering layers is, the smaller the arrangement density is; the scattering layer is in a dot shape to the light source receiving portion The center is annularly distributed, and the area of the plurality of point-like scattering layers is equal, and the further away from the light source receiving portion, the denser the density of the plurality of point-like scattering layers. [0009] A backlight module includes a frame, 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 Itr bottom core! a k-body; the at least • Λ: -%., ·.〆.:·.. an edge light source having a light exiting portion is fixed to the bottom plate; the optical plate is disposed in the cavity, the optical plate includes at least An optical plate unit comprising a light emitting surface and a bottom surface opposite to the light emitting surface, the bottom surface being formed with a plurality of spherical protrusions and having a light source receiving portion; and the optical plate further comprising a scattering formed on the light emitting surface a light-emitting portion of the edge-light point light source is disposed in the light source housing portion. The number of the scattering layers is plural, and is distributed in a spaced manner, and the distribution manner is one of the following: the scattering layer is annular, distributed at a gap interval centering on the light source accommodating portion, and the farther away from the light source accommodating portion is the corresponding annular scattering layer. The width of the scattering layer is annular, and is distributed at a center of the light source receiving portion. The corresponding widths of the plurality of annular scattering layers are equal, and the further away from the light source receiving portion, the arrangement of adjacent annular scattering layers The denser; the scattering layer is in the form of a dot, and is distributed in a ring shape centering on the light source accommodating portion. The plurality of point-like scattering layers are equidistant from each other in a direction away from the light source accommodating portion, and the further away from the light source accommodating portion, the 096117738 form No. A0101 Page 5 of 21 0993453540-0 1338157 On December 20, 099, the larger the area of the scattering layer, the smaller the arrangement density, the smaller the arrangement density; the scattering layer is in the shape of a light source. The center is annularly distributed, and the area of the plurality of point-like scattering layers is equal, and the further away from the light source receiving portion, the denser the density of the plurality of point-like scattering layers. [0010] The optical plate of the backlight module includes a light source housing portion, a scattering layer formed on the light exit surface, and a plurality of spherical protrusions formed on the bottom surface, and the light exit portion of the side light type light source is housed in the light source housing portion. Light emitted from the edge-light point source directly enters the interior of the optical plate through the inner side wall of the light source housing. Since the bottom surface of the optical plate is provided with a plurality of spherical protrusions, a part of the light originally totally reflected in the optical plate having no spherical protrusions can be adjusted and then emitted from the bottom surface. After reflection, the portion enters the scattering layer and further scatters. Finally, the optical uniformity and optical utilization of the backlight module are further improved. Further, due to the use of the edge-light point source, most of the light emitted by the edge-light point source propagates around the optical plate, and the point source is converted into a surface source by the action of the optical plate. Therefore, the backlight module adopting the first f-plate does not need to have a large mixed light space, and the thickness of the backlight alignment group is small. [Embodiment] Hereinafter, a backlight module and an optical plate thereof according to the present invention will be further described in detail with reference to the accompanying drawings and embodiments. Referring to FIG. 2, a backlight module 200 according to a preferred embodiment of the present invention includes a frame 21, a reflector 22, a side light point source 25, and an optical plate 20. The frame 21 includes a rectangular bottom plate 211 and four side walls 213 extending perpendicularly from the edge of the bottom plate 2 11 toward the same side and connected to each other. The four side walls 213 and the bottom plate 211 together form a cavity 217 for receiving 096117738 Form No. A0101 Page 6 / Total 21 Page 0993453540-0 1338.157 December 20, 099 Nuclear replacement page side light point light source 25, reflector 22 and components such as the optical plate 20. [0013] Referring to FIG. 3 to FIG. 5 simultaneously, the optical plate 20 has a rectangular shape, and includes a light emitting surface 202 and a bottom surface 203 opposite to the light emitting surface 202. A light source housing portion 204 is opened in the center of the bottom surface 203. The light source housing portion 204 is a through hole penetrating from the bottom surface 203 to the light exit surface 202. The light exiting surface 202 is provided with a scattering layer 205. The bottom surface 203 is formed with a plurality of spherical projections 206 located around the light source housing portion 204. In the present embodiment, the scattering layer 205 is distributed around the center of the optical plate 20 in an annular shape around the light source housing portion 204. The plurality of annular scattering layers 205 are equally spaced, and the further away from the light source receiving portion 204, the larger the radial width of the circular scattering layer 205, which is advantageous for improving the light uniformity of the optical plate. The scattering layer 2D5 may also be a polygon. The plurality of spherical projections 206 are arranged in a rectangular array. The radius R of each spherical surface ib is in the range of 0.01 mm to 2 mm; the depth of each spherical protrusion 206 ranges from greater than 0, 01 mm and less than or equal to its spherical radius R. The distance P between adjacent spherical protrusions 206 ranges from R/2 SPS4R. In this embodiment, each spherical protrusion 206 is a hemispherical protrusion. It can be understood that the arrangement of the spherical protrusions 206 on the optical plate 20 of the present embodiment may be arranged in an array, randomly arranged, or symmetrically distributed with respect to the center of the optical plate unit, in addition to the array arrangement. [0014] The scattering layer 205 is formed by curing a diffusion ink, which includes a transparent resin 2052 and scattering particles 2054 uniformly doped in the transparent resin 2052. The transparent resin 2052 is formed by curing a varnish in the diffusion ink, and is preferably an acrylic resin varnish. The scattering particles 2054 are incorporated into the diffusion ink in a ratio selected from one or more of the following particles: cerium oxide particles, polymethyl methacrylate particles, and glass beads. 096117738 Form No. A0101 Page 7 of 21 0993453540-0 -1338157 December 20, 2010 Correction [0015] Referring again to Figure 2, the edge-lit point source 25 is preferably an edge-lit LED. The light exit portion 251 and a reflective element 253 disposed at the top of the light exit portion 25 are included. The light exit portion 251 is housed in the light source housing portion 204 of the optical plate 20. The optical plate 20 is disposed within the cavity 217 with its light exit surface 202 facing the opening of the cavity 217. A reflector 22 is disposed below the bottom surface 203 of the optical plate 20. [0016] The light emitted from the light exit portion 251 of the edge light point source 25 directly enters the inside of the optical plate 20 through the inner side wall of the light source housing portion 205. Since the bottom surface of the optical plate 20 is provided with a spherical protrusion 206, a part of the light that has been totally reflected and propagated in the optical plate 20 not provided with the spherical protrusion 206 can be adjusted and then emitted from the bottom surface 203 φ to assist the frame 101. Next, the portion of the light is refracted multiple times and then enters the scattering layer 205 to further scatter the opening uniformly to emit +·*· 〆_/! Therefore, the optics of the backlight module 200. Jiqiu: % increase. Further, since the edge light source 25 is used, most of the light emitted by the edge light source 25 propagates around the optical plate 20, and the point source is converted into a surface light source. Therefore, the backlight module 200 can reduce the height of the light box when a small number of point sources are used, so that the backlight module 200 can effectively reduce the cost and thickness. [0017] The backlight module 200 may further include a transparent plate (not shown) for covering the opening of the cavity 217, or a diffusion plate (not shown) or/and a prism sheet (Fig. Not shown), for improving the backlight module 200 to have a higher uniform brightness within a specific viewing angle range. In order to uniformly mix the light beam within the cavity and improve light utilization, the reflector 22 may further include a plurality of reflective sidewalls 223. Further, the reflecting plate 22 of the present embodiment can be omitted, especially when the frame 21 is made of a highly reflective material or a highly reflective coating is applied inside the bottom plate 211 and/or the side wall 213. In addition, the light source accommodating portion 096117738 in the present embodiment, the form number Α0101, the eighth page/the total 21 page, 0993453540-0, 1338157, the reversing page 4 of December 20, 2010 can also be designed to be recessed from the bottom surface 203 toward the inside of the optical plate 30. The blind hole, the reflective sheet 253 of the edge light source 25 can be disposed on the optical plate 20 at the top of the light exit portion 251. [0018] Please refer to the male cabinet β. Figure 6, which is a preferred embodiment of the present invention. The optical plate is 3 turns. The light-emitting plate 30 is similar to the optical plate 20 of the first embodiment except that the scattering layer 305 of the light is continuously distributed, which completely covers the light-emitting surface 302 of the optical plate 30. [0099] Referring to Figure 7', there is shown an optical plate 4 of a preferred embodiment of the present invention. The light-receiving plate 4 is similar to the optical plate 2A of the first embodiment, except that the respective widths of the plurality of annular scattering layers 405 of the light-emitting surface 402 of the optical plate 40 are equal, and are separated from the light source receiving portion 404. The farther away, the greater the density of the scattering layer 405 of the square ring. [〇〇2〇] It can be understood that the plurality of square-shaped scattering layers 405 of the optical plate 4 can also be equally spaced, and the further away from the light source housing portion 4〇4, the wider the width of the square-shaped scattering layer 405. The scattering layer 405 may also be circular or other φ polygons other than the rectangle. The plurality of circular scattering layers 205 of the optical plate 20 may also have an equal width, the further away from the light source receiving portion 204, the adjacent circular ring. The arrangement density of the scattering layer 205 is larger. [002U] Referring to FIG. 8, an optical plate 50 and an optical plate 50 of a preferred embodiment of the present invention are similar to the optical plate 2 of the first embodiment, except that the scattering layer 505 of the optical plate 50 is plural. In the same size, the plurality of dot-shaped scattering layers 505 are arranged in a plurality of equally spaced annular rows around the light source accommodating portion 504 and are further away from the light source accommodating portion 5 〇 4, and a plurality of point-like scattering layers 505 are looped. The smaller the spacing is. The scattering layer 505 in this embodiment can also be reproduced as 096117738 Form No. 1010101 Page 9/Total 21 Page 0993453540-0 1338157 December 20, 2010 Correction of the number of dots of different sizes, a plurality of dot-like scattering layers 505 The light source accommodating portion 504 is centered, and the further away from the light source accommodating portion 504, the larger the area of the plurality of dot-shaped scattering layers 505 and the larger the circumferential pitch. It can be understood that the point-like scattering layer 505 in the present embodiment has a dot shape, and may be other dot shapes such as a rectangular dot or the like. In addition, the dot-shaped scattering layer 505 may also be arranged in a polygonal ring shape. [0022] 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 plate units of the above-described overall structure, or a plurality of light sources < accommodating portions may be provided for each of the optical plate units. In addition to the rectangular shape, the optical plates 20, 30, 40, 50 may be in the shape of a polygon or a circle or the like. %: 显#;, [0023] Please refer to Fig. 9, which shows the Qin I# Su, 5. Washing board 60 of the present invention, which is composed of a plurality of optical plate units 62. Each of the optical plate units 62 has the same structure as the optical plate 20 of the preferred embodiment 1. [0024] 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 the white light mixing backlight module formed by the side light type of the different colors may be used. Or use a side-lit light-emitting diode of the same color to make a backlight module of a specific color. [0025] In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art will be equivalently modified or changed in accordance with the spirit of the invention. All should be included in the scope of the following patent application. [Simple description of the drawing] 096117738 Form No. A0101 Page 10 of 21 0993453540-0 1338157 December 20, 2010, the replacement page [0026] FIG. 1 is a 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. 4 is a cross-sectional view of the optical plate shown in FIG. 3 taken along line IV-IV. [0029] FIG. 5 is a perspective view of another perspective view of the optical plate shown in FIG. 3. 6 is a cross-sectional view of an optical plate according to a preferred embodiment of the present invention. 7 is a schematic view showing a distribution of a scattering layer of a three-dimensional optical plate according to a preferred embodiment of the present invention. [0033] FIG. 8 is a schematic view showing a distribution of a scattering layer of a four-color box in accordance with a preferred embodiment of the present invention. [0034] 9 is a perspective exploded view of a combined optical plate of a preferred embodiment of the present invention. [Description of Main Component Symbols] [0035] (Invention)
[0036] 背光模組：20 0 [0037] 反射元件：253 [0038] 框架：21 [0039] 光學板：20 [0040] 底板：2 11 [0041] 出光面：202 [0042] 側壁：213 096117738 表單編號A0101 第11頁/共21頁 0993453540-0 099年12月20日修正替換頁 [0043] 底面：203 [0044] 反射板：22 [0045] 光源容納部：204 [0046] 反射側壁：223 [0047] 散射層：205 [0048] 側光式點光源：25 [0049] 球面凸起：2 0 6 [0050] 出光部：2 5 1 [0051] 腔體：217 [0052] (習知） [0053] 背光模組：100 [0054] 擴散板：103 [0055] 框架：101 [0056] 棱鏡片：104 [0057] 底板：1 0 11 [0058] 發光二極體：105 [0059] 側壁：1013 [0060] 出光部：1051 [0061] 腔體：1017[0036] Backlight module: 20 0 [0037] Reflecting element: 253 [0038] Frame: 21 [0039] Optical plate: 20 [0040] Base plate: 2 11 [0041] Light-emitting surface: 202 [0042] Side wall: 213 096117738 Form No. A0101 Page 11 / Total 21 Page 0993453540-0 December 20, 2010 Correction Replacement Page [0043] Bottom Surface: 203 [0044] Reflector: 22 [0045] Light Source Housing: 204 [0046] Reflecting Sidewall: 223 [0047] Scattering layer: 205 [0048] Side-light point source: 25 [0049] Spherical protrusion: 2 0 6 [0050] Light-emitting portion: 2 5 1 [0051] Cavity: 217 [0052] (Generally known) [0053] Backlight module: 100 [0054] Diffuser plate: 103 [0055] Frame: 101 [0056] Prism plate: 104 [0057] Base plate: 1 0 11 [0058] Light-emitting diode: 105 [0059] Side wall: 1013 [0060] Light exit part: 1051 [0061] Cavity: 1017
••痒,1· :’· f ' \ \.y- . ;. r f .，二乂...• Itchy, 1· :’· f ' \ \.y- . ;. r f ., two...
096117738 表單編號A0101 第12頁/共21頁 0993453540-0 1338157 [0062] 基部： [0063] 反射板 [0064] 反射片 1053 ：102 ：106 099年12月20日核正替換頁096117738 Form No. A0101 Page 12 of 21 0993453540-0 1338157 [0062] Base: [0063] Reflector [0064] Reflector 1053 : 102 : 106 December 20, 099 Nuclear Replacement Page
096117738 表單編號A0101 第13頁/共21頁 0993453540-0096117738 Form No. A0101 Page 13 of 21 0993453540-0