1344017 100年〇4月15日按正替换頁 發明說明： 【發明所屬之技術領域】 [0001] 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】 [0002] [0003] 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101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1013。底板1011與 複數側壁101 3共同形成一腔體107。發光二極體105包括 出光部1051與基部1 053，基部1053與電路板（未標示）相 連並固定於底板1011。擴散板103與棱鏡片104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102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105之出 光部1051穿過相應通孔。發光二極體105之基部1 053頂 持該反射板102。 [0004] 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100在特定視角範圍内之亮 096117743 表單編號A0101 第3頁/共18頁 1003130914-0 1344017 100年〇4月15日按正替换苜 度提高。1344017 100 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光Optical plate. [Prior Art] [0002] 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 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 1013 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 101 3 together form a cavity 107. The light-emitting diode 105 includes a light-emitting portion 1051 and a base portion 053, and the base portion 1053 is connected to a circuit board (not shown) and fixed to the bottom plate 1011. The diffusion plate 103 and the prism sheet 104 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 102, and the light emitting portion 1051 of the light emitting diode 105 passes through the corresponding through hole. The base 1 053 of the light-emitting diode 105 holds the reflector 102. [0004] In operation, the light generated by the LEDs 105 is reflected by the reflector 102 into the diffuser 103, and the light is uniformly diffused in the diffuser 103 to continue into the die 104. Under the action of the prisms 104, the light is emitted. A certain degree of aggregation occurs, causing the backlight module 100 to illuminate within a certain viewing angle range. 096117743 Form No. A0101 Page 3/18 pages 1003130914-0 1344017 100 years/April 15th is increased by the positive replacement degree.
背光模組均之缺點‘ :ν. ί ' i · ·<» ：*>·· ·. ·； 有必要提供一種出光均勻之背光模組及 [0005] 然而，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，因此容易在發光 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100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 【發明内容】 [0006] 鑒於上述狀況 其光學板。 [0007] 一種光學板，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，該底面開設有至少一光源容納部。該散射層 為圓環狀或網點狀，並以光源容納部為中心間隔分佈。 [0008] 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，該複數側壁與該底板形成一腔體；該至少 一具有出光部之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、與該出光面相對之底面及形成於該出 光面之散射層，該底面開設有至少一光源容納部；該點 096117743 表單編號 Α0101 第 4 頁/共 18 頁 1003130914-0 1344017 100年04月15日按正替换頁 光源之出光部相應設置於該光源容納部内。該散射層為 圓環狀或網點狀，旅以光源容納部為中心間隔分佈。 [〇〇〇9]上述背光模組之光學板包括光源容納部以及行成於出光 面之散射層。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。由於光學板出光面上形成有散射層，部分原來 於未形成有散射層之光學板内全反射之光線可進入散射 層後進行散射，最後從腔體開口均勻出射，因此背光模 組之光學利用率可得到提高。由於採用側光式點光源， 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，因而背光模組避免因燈箱高度過 低而於點光源上方出現亮點。因此，背光模組可降低燈 箱之高度，而且採用此具有散射層之導光板之背光模組 可省略習知擴散板之使用，從而背光模組可以有效減少 成本與降低厚度。 【實施方式】 [0010] 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。 [0011] 請參見圖2，所示為本發明較佳實施例一之背光模組2〇〇 ’其包括-框架2卜-反射板22 ' 一側光式點光源以及 -光學板20。框架21包括_長方形底板2ιι及從底板2ιι 邊緣向其同一侧垂直延伸並相互連接之四側壁213。四側 壁213與底板211共同形成-腔體217，用於收容點光源 25、反射板22及光學板20等元件。 096117743 請參見圖3 ’光學板20為與框架21之底板213相搭配之矩 表單編號Α0101 第5頁/共18頁 1003130914-0 [0012] 1344017 100年04月15日接正替换苜 形板，其包括一出光面202、一與出光面20 2相對之底面 203 ’以及一覆蓋出光面202之均勻厚度之散射層205。 底面203中央開設有一光源容納部204。光源容納部204 為從底面203向内凹陷之盲孔。 _3] 散射層205由擴散油墨固化而成，其包括透明樹脂2052和 均勻摻雜在透明樹脂2 0 5 2中之散射粒子2 0 5 4 »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、聚甲基丙烯 酸甲酯顆粒和玻璃微珠等。 [0014]請再參閱圖2，側光式點光舉脅發光二極體 ’其包括一基部253，一固,出光部 251與一反射片255。點光源25通過電路板（圖未示）固 定於底板211 »光學板20設置在腔體217内，其出光面 202面向腔體217開口》點光源25之出光部251容納於光 學板2 0之光源容納部2 〇 4内。反射片2 5 5設置在散射層 204對應點光源25正上方之位置，用於覆蓋點光源25之頂 部。反射片255之面積等於或略大於出光部251之投影面 積。反射板2 2開設有一對應於點光源2 5之出光部2 51之通 孔（未標示）。反射板22設置在光學板2〇底面2〇3之下方 ，點光源25之出光部251穿過該通孔（未標示）。 [0015]The shortcomings of the backlight module are: ν. ί ' i · · <» :*>······ It is necessary to provide a backlight module with uniform light emission and [0005] However, due to the light-emitting diode 105 For the point light source, the distances reaching the diffusion plate 103 are not equal. The unit area of the diffusion plate 103 located directly above the light-emitting diode 105 receives more light, and the diffusion plate 103 is located around the light-emitting diode 105. Since less light is received, it is easy to form a bright area in a region directly above the light emitting diode 105, and a dark area is formed in a peripheral area above the light emitting diode 105, which affects the light uniformity of the backlight module 100. For this reason, it is generally 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, but the optical sheet is considered in view of the above situation. 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 having at least one light source receiving portion. The scattering layer has an annular shape or a dot shape and is spaced apart around the light source housing portion. [0008] 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 forming a cavity with the bottom plate The at least one point light source having the light exiting portion is fixed to the bottom plate; the optical plate is disposed in the cavity, the optical plate includes at least one optical plate unit, and the optical plate unit includes a light emitting surface and a bottom surface opposite to the light emitting surface And a scattering layer formed on the light-emitting surface, the bottom surface is provided with at least one light source receiving portion; the point 096117743 Form No. 1010101, 4th page, a total of 18 pages, 1003130914-0 1344017, April 15, 100, according to the replacement of the light source of the page light source The portion is correspondingly disposed in the light source housing. The scattering layer is annular or dot-like, and the brigade is distributed at a center of the light source housing. [〇〇〇9] The optical plate of the above backlight module includes a light source housing portion and a scattering layer formed on the light exiting surface. The light exit portion of the point source is housed in the light source housing portion, and the light emitted from the point source directly enters the inside of the optical plate through the inner side wall of the light source housing portion. Since a scattering layer is formed on the light-emitting surface of the optical plate, part of the light that is totally reflected in the optical plate in which the scattering layer is not formed can enter the scattering layer, scatter, and finally uniformly emerge from the cavity opening, thereby optically utilizing the backlight module. The rate can be improved. Due to the use of the edge-light point source, most of the light emitted by the point source propagates around the optical plate, and the point source is converted into a surface source. Therefore, the backlight module avoids bright spots above the point source due to the low height of the light box. Therefore, the backlight module can reduce the height of the light box, and the backlight module using the light guide plate with the scattering layer can omit the use of the conventional diffusion plate, so that the backlight module can effectively reduce the cost and the thickness. [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, there is shown a backlight module 2'' of a preferred embodiment of the present invention, which includes a frame 2-reflector 22' side light point source and an optical plate 20. The frame 21 includes a rectangular bottom plate 2 ι and four side walls 213 extending perpendicularly from the edge of the bottom plate 2 ιι to the same side and connected to each other. The four side walls 213 and the bottom plate 211 together form a cavity 217 for accommodating elements such as the point light source 25, the reflection plate 22, and the optical plate 20. 096117743 Please refer to FIG. 3 'The optical plate 20 is the same as the bottom plate 213 of the frame 21. Form number Α0101 Page 5 / Total 18 pages 1003130914-0 [0012] 1344017 On April 15, 100, the replacement of the slab is replaced. It includes a light exiting surface 202, a bottom surface 203' opposite the light exiting surface 202, and a scattering layer 205 covering a uniform thickness of the light emitting surface 202. A light source receiving portion 204 is defined in the center of the bottom surface 203. The light source housing portion 204 is a blind hole that is recessed inward from the bottom surface 203. _3] The scattering layer 205 is formed by solidifying a diffusion ink, which comprises a transparent resin 2052 and scattering particles uniformly doped in the transparent resin 205. The transparent resin 2052 is cured by varnish in the diffusion ink. An acrylic resin varnish is preferred. 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. Referring to FIG. 2 again, the edge-light point light-emitting diodes 'include a base portion 253, a solid portion, a light-emitting portion 251 and a reflection sheet 255. The point light source 25 is fixed to the bottom plate 211 through a circuit board (not shown). The optical plate 20 is disposed in the cavity 217, and the light exiting surface 202 faces the cavity 217. The light exiting portion 251 of the point light source 25 is received in the optical plate 20 The light source housing portion 2 is inside the crucible 4. The reflection sheet 2 5 5 is disposed at a position directly above the point source 15 of the scattering layer 204 for covering the top of the point source 25. The area of the reflection sheet 255 is equal to or slightly larger than the projection area of the light exit portion 251. The reflecting plate 2 2 has a through hole (not shown) corresponding to the light exiting portion 2 51 of the point light source 25. The reflecting plate 22 is disposed below the bottom surface 2〇3 of the optical plate 2, and the light exiting portion 251 of the point light source 25 passes through the through hole (not shown). [0015]
點光源25從出光部251發出之光線通過光源容納部2〇4之 内侧壁直接進入光學板20内部。由於光學板20出光面202 上形成有散射層205，部分原來在未形成有散射層205之 光學板内全反射傳播之光線可進入散射層後進行散射， 096117743 表單編號A0101 笫6頁/共18頁 1003130914-0 1344017 100年04月15日按正替 最後從腔體開口 21 7均勻出射，因此背光模組之光學利用 率將提高。進一步地，由於採用側光式點光源2 5，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，因而背光模組200避免因燈箱高度 過低而於點光源上方出現亮點。因此，背光模組200可降 低燈箱之高度，而且採用此具有散射層205之導光板20之 背光模組200可省略擴散板之使用，從而背光模組200可 以有效減少成本與降低厚度。 [0016] 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，也可另外增加一擴散板（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。另外需要強調：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。另外，本實施例中 之光源容納部204可設計為貫穿出光面202與底面203之 通孔，與該光源容納部204相搭配，點光源25之反射片 255可直接設置於出光部251之頂部。本實施例中之反射 片2 5 5並非點光源2 5之必要元件，側光式點光源2 5可採用 其他減少從其頂部出射光束之其他設計，如於其頂部塗 覆反射層等。 [0017] 請參見圖4，所示為本發明較佳實施例二之背光模組300 。背光模組300與較佳實施例一之背光模組200相似，其 區別僅在於光學板30與光學板20不同。該光學板30之散 096117743 表單編號A0101 第7頁/共18頁 1003130914-0 1344017 100年04月15日修正替換苜 射層305為不連續分佈。本實施例中，散射層305為網點 狀不規則排佈。 [0018] 請參見圖5，所示為本發明較佳實施例三之背光模組400 。背光模組400與較佳實施例一之背光模組200相似，其 區別僅在於光學板40與光學板20不同。該光學板40之光 源容納部404為從底面403貫穿至出光面402之通孔。 [0019] 上述實施例中，光學板20、30、40都為一整體結構。本The light emitted from the light-emitting 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 2〇4. Since the scattering layer 205 is formed on the light-emitting surface 202 of the optical plate 20, a portion of the light that has been totally reflected and propagated in the optical plate in which the scattering layer 205 is not formed may enter the scattering layer and be scattered, 096117743 Form No. A0101 笫6/18 Page 1003130914-0 1344017 On April 15th, 100th, the final output from the cavity opening 21 7 is finally discharged, so the optical utilization of the backlight module will be improved. Further, since the side light source point light source 25 is used, most of the light emitted by the point light source 25 propagates around the optical plate 20, and the point light source is converted into a surface light source, so that the backlight module 200 avoids the light box height being too low. A bright spot appears above the point source. Therefore, the backlight module 200 can reduce the height of the light box, and the backlight module 200 using the light guide plate 20 having the scattering layer 205 can omit the use of the diffusion plate, so that the backlight module 200 can effectively reduce the cost and the thickness. [0016] The backlight module 200 may further include a transparent plate (not shown) for covering the opening of the cavity 217, or may additionally add a diffusion plate (not shown) or/and a prism sheet (not shown). The display module 200 is configured to improve the uniform brightness of the backlight module 200 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, it is emphasized that 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 204 of the embodiment can be designed to penetrate the through hole of the light emitting surface 202 and the bottom surface 203, and the light source accommodating portion 204 can be directly disposed on the top of the light emitting portion 251. . The reflective sheet 2 5 5 in this embodiment is not an essential component of the point source 25, and the side-light point source 25 may employ other designs that reduce the beam exiting from the top, such as a reflective layer applied to the top thereof. Referring to FIG. 4, a backlight module 300 according to a second embodiment of the present invention is shown. The backlight module 300 is similar to the backlight module 200 of the preferred embodiment, except that the optical plate 30 is different from the optical plate 20. The scattering of the optical plate 30 096117743 Form No. A0101 Page 7 of 18 1003130914-0 1344017 The correction of the replacement layer 305 is a discontinuous distribution on April 15, 100. In this embodiment, the scattering layer 305 is arranged in a dot-like irregular arrangement. Referring to FIG. 5, a backlight module 400 according to a third embodiment of the present invention is shown. The backlight module 400 is similar to the backlight module 200 of the preferred embodiment, except that the optical plate 40 is different from the optical plate 20. The light source accommodating portion 404 of the optical plate 40 is a through hole penetrating from the bottom surface 403 to the light exit surface 402. [0019] In the above embodiment, the optical plates 20, 30, 40 are all of a unitary structure. this
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，或者每個光學板單元開設複數光源容納 部。光學板20、30、40之形狀除了為矩形外，還可為多 邊形或圓形等。 _ If: [0020] 本發明之光學板單元或組昝紫擊策‘可設if1薇數光源容納 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。The large-sized optical plate of the invention may be composed of a plurality of optical plate units of the above-described overall structure, or each of the optical plate units may be provided with a plurality of light source accommodating portions. The shape of the optical plates 20, 30, 40 may be polygonal or circular, etc., in addition to being rectangular. _ If: [0020] The optical plate unit or the group of the present invention can be provided with an if1 wei number light source accommodating portion, and the plurality of light source illuminating portions can be used to make white light. A mixed-light backlight module, or a side-lit light-emitting diode of the same color to form a backlight module of a specific color.
[0021] 上述實施例中光學板20、30、40之散射層205、305、 405之分佈還可以有以下變換設計。 [0022] 如圖6所示，散射層605在出光面602之分佈為：以光源容 納孔604為圓心，複數圓環狀之散射層605間隔分佈，且 越遠離光源容納孔604，圓環狀之散射層605之徑向厚度 越大，此設計有利於提高光學板之出光均勻性。 [0023] 如圖7所示，散射層705在出光面702之分佈為：以光源容 納孔704為圓心，複數徑向厚度相同之圓環狀之散射層 705間隔分佈，且越遠離光源容納孔704，圓環狀之散射 096117743 表單編號 A0101 第 8 頁/共 18 頁 1003130914-0 100年04月15日核正替換頁 層705之排佈密度越大，此設計.有利於提高光學板之出光 均勻性。 [0024] 如圖8所示，散射層805在出光面802之分佈為：以光源容 納孔804為圓心，複數網點狀之散射層805沿著圓環形軌 道間隔分佈，且越遠離光源容納孔804，網點狀之散射層 805之直徑越大面積也越大，此設計有利於提高光學板之 出光均勻性。 [0025] 如圖9所示，散射層905在出光面902之分佈為：以光源容 納孔904為圓心，複數相同大小之網點狀之散射層905沿 著圓環形軌道間隔分佈，且越遠離光源容納孔904，網點 狀之散射層905之排佈密度越大，此設計有利於提高光學 板之出光均勻性。 [0026] 綜上所述，本發明確已符合發明專利要件，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，於援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】 [0027] 圖1係一種習知背光模組之結構示意圖》 [0028] 圖2係本發明較佳實施例一之背光模組之剖面示意圖。 [0029] 圖3係圖2所示背光模組之光學板之立體圖。 [0030] 圖4係本發明較佳實施例二之背光模組之剖面示意圖。 [0031] 圖5係本發明較佳實施例三之背光模組之剖面示意圖。 [0032] 圖6至圖9係本發明之光學板之散射層之各種分佈示意圖 3 表單編號A0101 第9頁/共18頁 1003130914-0 1344017 100年04月15日核正替换頁 [0033] [0034] [0035] [0036] [0037] [0038] [0039] [0040] [0041] [0042] [0043] [0044] [0045] [0046] [00471 [0048] [0049] 【主要元件符號說明】 背光模組：200、300、400 光學板：20、30、40 框架：21 反射板：22 側光式點光源：25 出光面：202、402、602、702、802、90 2 底面：203、4 03 :Λ:寫.德、 • V ' ''r· ·'·- 光源容納部：204、404、6:1(3¾、_4^||p04 散射層：205、305、605、705、805、905 底板：211 側壁：213 腔體：217 透明樹脂：20 52 散射粒子：2054 出光部：2 51 基部：253 反射片：2 5 5[0021] The distribution of the scattering layers 205, 305, 405 of the optical plates 20, 30, 40 in the above embodiment may also have the following transformation design. [0022] As shown in FIG. 6, the distribution of the scattering layer 605 on the light-emitting surface 602 is as follows: the light source receiving hole 604 is centered, and the plurality of annular scattering layers 605 are spaced apart from each other, and are further away from the light source receiving hole 604, and are annular. The larger the radial thickness of the scattering layer 605, the better the uniformity of the light output of the optical plate. [0023] As shown in FIG. 7, the distribution of the scattering layer 705 on the light-emitting surface 702 is such that the light-source receiving hole 704 is centered, and the plurality of annular scattering layers 705 having the same radial thickness are spaced apart, and the distance is further away from the light-receiving hole. 704, circular scattering 096117743 Form No. A0101 Page 8 of 18 1003130914-0 100 April 15th The replacement density of the replacement layer 705 is larger, this design is beneficial to improve the light output of the optical plate Uniformity. As shown in FIG. 8 , the distribution of the scattering layer 805 on the light-emitting surface 802 is as follows: the light source receiving hole 804 is centered, and the plurality of dot-like scattering layers 805 are spaced along the circular orbit, and the farther away from the light source receiving hole. 804, the larger the diameter of the dot-like scattering layer 805 is, the larger the area is. This design is beneficial to improve the light uniformity of the optical plate. [0025] As shown in FIG. 9, the distribution of the scattering layer 905 on the light-emitting surface 902 is as follows: the light source receiving holes 904 are centered, and a plurality of dot-like scattering layers 905 of the same size are distributed along the circular orbit, and the farther away The arrangement of the light source receiving holes 904 and the dot-like scattering layer 905 is larger, and this design is advantageous for improving the light uniformity of the optical plate. In summary, the present invention has indeed met the requirements of the invention patent, and has filed 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 [0027] FIG. 1 is a schematic cross-sectional view of a conventional backlight module according to 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 a backlight module according to a second embodiment of the present invention. 5 is a cross-sectional view of a backlight module in accordance with a third embodiment of the present invention. 6 to FIG. 9 are schematic diagrams showing various distributions of scattering layers of the optical plate of the present invention. Form No. A0101 Page 9 of 18 1003130914-0 1344017 Correction page of April 15, 2014 [0033] [ [0035] [0037] [0038] [0038] [0044] [0044] [0044] [0046] [0046] [0049] [0049] [Main component symbols Description] Backlight module: 200, 300, 400 Optical plate: 20, 30, 40 Frame: 21 Reflector: 22 Side light point light source: 25 Light exit surface: 202, 402, 602, 702, 802, 90 2 Bottom surface: 203, 4 03 : Λ: write. De, • V ' ''r· ·'·- Light source housing: 204, 404, 6:1 (33⁄4, _4^||p04 scattering layer: 205, 305, 605, 705, 805, 905 bottom plate: 211 side wall: 213 cavity: 217 transparent resin: 20 52 scattering particles: 2054 light-emitting part: 2 51 base: 253 reflection sheet: 2 5 5
096117743 表單編號A0101 第10頁/共18頁 1003130914-0096117743 Form No. A0101 Page 10 of 18 1003130914-0