1345077 099年12月20日梭正替換頁 六、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。 [0002] [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， 爲達到顯示效果’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。 [0003] 請一併參見圖1與圖2 ’所示爲一種習知之背光模組1 〇 〇， '' ；' ", 其包括一框架1 〇 1、一反射板0名、，擴.¾板1 〇3、一稜 鏡片104及至少一側光式發光二板體1:05 _。框架101包括 一長方形底板1011及四個從該底板1011邊緣向其同一側 垂直延伸之側壁1 〇 13。底板1 〇 11與四個側壁1 〇 13共同形 成一腔體108。發光二極體,1〇5設置於底板1011，其包括 一發光部ι〇5ΐ。擴散板iof與棱声>{ 依次設置於複數 1 * ' λ 侧壁1013頂部。反射板102爲<^小框禮'結構，其可配置於 框架101内部。該反射板102之底部開設有與發光二極體 105相對應之通孔1〇21 ·，且發光二極體105之發光部1051 穿過相應通孔1021向擴散板103發射光束。 [0004] 工作時，發光二極體105産生之光線進入擴散板103被均 勻擴散後，其繼續進入棱鏡片104，於棱鏡片104之作用 下使出射光線發生一定程度之聚集作用，以提高背光模 組1〇0於特定視角範圍内之亮度。 [0005] 096115956 然而，由於發光二極體105爲點光源，其到達擴散板103 表單煸號Α0101 第4頁/共22頁 0993454762-0 1345,077 [0006] [0007] [0008]1345077 December 20, 099, the replacement of the page, the invention: [Technical Field] [0001] 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 Its optical board. [0002] [Prior Art] Since the liquid crystal of the liquid crystal display panel itself has no illuminating property, in order to achieve the display effect, it is necessary to provide a liquid crystal display panel with a light source device such as a backlight module. The backlight module functions to supply a surface light source with sufficient brightness and uniform distribution to the liquid crystal display panel. [0003] Please refer to FIG. 1 and FIG. 2 together as a conventional backlight module 1 〇〇, ''; ' ", which includes a frame 1 〇 1, a reflector 0, expansion. 3⁄4 plate 1 〇3, one cymbal 104 and at least one side light-emitting two-plate body 1:05 _. The frame 101 includes a rectangular bottom plate 1011 and four side walls 1 〇 13 extending perpendicularly from the edge of the bottom plate 1011 toward the same side thereof. The bottom plate 1 〇 11 and the four side walls 1 〇 13 together form a cavity 108. The light-emitting diode, 1〇5, is disposed on the bottom plate 1011 and includes a light-emitting portion ι〇5ΐ. The diffusion plate iof and the edge sound > { are sequentially disposed on the top of the plurality of 1 * ' λ side walls 1013. The reflecting plate 102 is a <^small frame" structure which can be disposed inside the frame 101. The bottom of the reflector 102 is provided with a through hole 1 〇 21 corresponding to the illuminating diode 105, and the illuminating portion 1051 of the illuminating diode 105 passes through the corresponding through hole 1021 to emit a light beam to the diffusing plate 103. [0004] When the light generated by the light-emitting diode 105 is uniformly diffused into the diffusion plate 103, it continues to enter the prism sheet 104, and the emitted light is concentrated to a certain extent under the action of the prism sheet 104 to improve the backlight. The brightness of the module 1〇0 within a specific viewing angle range. [0005] 096115956 However, since the light-emitting diode 105 is a point light source, it reaches the diffusion plate 103. Form number Α0101 Page 4/Total 22 pages 0993454762-0 1345,077 [0006] [0007] [0008]
I 099年12月20日梭正脊換頁I 上各處之距離大小不相等，位於發光二極體1〇5正上方之 擴散板103單位區域所接受光較多，位於發光極管1〇5周 圍之擴散板103單位區域所接受光較少，故容易於發光二 極體105正上方形成亮區，而於發光極管1〇5周圍之擴散 板103區域形成暗區，影響背光模組1〇〇之出光均勻性。 爲此’通常於發光—極體1 〇 5上或於擴散板1 〇 3與發光二 極體105對應之區域設置反射片107，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1〇7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仍然存在出光不均之不足。 【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 表面形成有複數微凸起，每一微凸起包括至少三個相互 連接之側面，每一侧面之水平:寬度沿遠離該第一表面之 方向逐漸縮小，該光學板之微凸起之兩相對侧面之夾角 與相鄰微凸起形成之底部夾角之至少其中之一被圓角化 處理，該第二表面形成複數球面凸起，且該第一表面和 第二表面其中至少一表面開設有光源容納部。 一種背光模組’其包括一框架、一擴散板、至少一侧光 式點光源及一光學板，框架包括一底板及複數從該底板 邊緣向遠離底板之方向延伸之側壁，複數側壁相互連接 並與底板形成一腔體’該至少一點光源設於該底板，且 096115956 表單編號Α0101 第5頁/共22頁 0993454762-0 1345077 099年12月20日梭正替换頁 點光源包括出光部，擴散板設置於複數侧壁頂部，該光 學板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 複數微凸起，每一微凸起包括至少三個相互連接之側面 ，每一側面之水平寬度沿遠離該第一表面之方向逐漸縮 小，該第二表面形成複數球面凸起，且該第一表面和第 二表面其中至少一表面開設有光源容納部，該點光源之 出光部相應設置於該光源容納部内。 [0009] 上述背光模組之光學板之光學板單元包括光源容納部與 第一表面上之複數微凸起以及第二表面形成複數球面凸 起，點光源之出光部容納於光^'源:=容^部'·;-當>第二表面面On December 20, 099, the distance between the various parts of the shuttle ridge is different. The diffuser plate 103 located directly above the light-emitting diode 1〇5 receives more light, and is located in the light-emitting diode 1〇5. The surrounding area of the diffusion plate 103 receives less light, so that a bright area is formed directly above the light-emitting diode 105, and a dark area is formed in the area of the diffusion plate 103 around the light-emitting diode 1〇5, which affects the backlight module 1 The uniformity of light output. To this end, a reflection sheet 107 is provided on the light-emitting body 1 〇 5 or in a region corresponding to the light-emitting diode 105 of the diffusion plate 1 〇 3 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 1〇7 can weaken the bright area directly above the light-emitting diode 105 to some extent. However, the backlight module 100 still has insufficient light unevenness. 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 to the first surface, the first surface being formed with a plurality of microprotrusions, each microprotrusion comprising at least Three interconnected sides, the level of each side: the width gradually decreases away from the first surface, and the angle between the opposite sides of the micro-protrusions of the optical plate and the bottom angle formed by the adjacent micro-protrusions One of the two surfaces is rounded, the second surface forms a plurality of spherical protrusions, and at least one of the first surface and the second surface is provided with a light source receiving portion. A backlight module includes a frame, a diffusing plate, at least one side light point light source and an optical plate. The frame comprises a bottom plate and a plurality of side walls extending from the edge of the bottom plate away from the bottom plate, and the plurality of side walls are connected to each other Forming a cavity with the bottom plate. The at least one light source is disposed on the bottom plate, and 096115956 Form No. 1010101 Page 5 / Total 22 Pages 0993454762-0 1345077 December 20, 2008 The shuttle is replacing the point source including the light exiting portion, the diffusing plate And disposed on the top of the plurality of sidewalls, the optical panel includes at least one optical panel unit, the optical panel unit includes a first surface and a second surface opposite to the first surface, the first surface is formed with a plurality of microprotrusions, each The microprotrusion includes at least three interconnected sides, the horizontal width of each side is gradually reduced in a direction away from the first surface, the second surface forms a plurality of spherical protrusions, and the first surface and the second surface are at least A light source receiving portion is disposed on a surface, and the light emitting portion of the point light source is disposed in the light source receiving portion. [0009] The optical plate unit of the optical plate of the backlight module includes a light source receiving portion and a plurality of micro protrusions on the first surface and a second surface forming a plurality of spherical protrusions, and the light exit portion of the point light source is received in the light source: =容^部'·;-When> second surface
|HSI 向擴散板時，從點光源發出之光線藉由光源5容納部之内 側壁直接進入光學板内部。由於第二表面之球面凸起具 有變化之表面結構，使光線於光學板内傳輸至球面凸起 時，部分原來於未設有球面凸起之光學板内全反射傳播 之光線可被球面凸起調節後朝高减散板方向折射出射， 1 * ί 從而增加出射光線。進一步地：、由於光學板之第一表面 設置有微凸起，部分原來於未設有微凸起之光學板内全 反射傳播之光線可被其調節後從第一表面出射，然後此 部分光線可藉由多次折射後朝向擴散板出射。故背光模 組之光學利用率也將進一步提高。同理，當第一表面面 向擴散板時，藉由微凸起與球面凸起之作用，背光模組 之光學利用率也將進一步提高。更進一步地，由於採用 側光式點光源，於光學板之作用下，點光源被轉變成面 光源。採用該光學板之背光模組具有厚度小之優點。 096115956 表單編號Α0101 第6頁/共22頁 0993454762-0 1345077 [0010] [0011] [0012] [0013] [0014] 096115956 099年12月20日核正替换頁 【實施方式】 下面將結合附圖和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。 請一併參閱圖3、圖4和圖5，本發明較佳實施例一提供一 光學板20。該光學板20呈四方形，其包括複數光學板單 元21，該複數光學板單元21爲陣列緊密排佈。每一光學 板單元21包括一底面213及一與該底面213相對之出光面 215。底面213中央開設有光源容納部211。本實施例中 ，該光源容納部211爲從底面21 3貫穿至出光面21 5之通 孔。底面21 3形成有複數位於光源容納部211四周之微凸 起214。出光面21 5形成複數位於光源容納部211四周之 球面凸起216。本實施例中〆¥—光學板單元21之複數微 ',* .之: ； 凸起214與複數球面凸起21 6於相應之表面上呈矩形排佈 ，且該光源容納部211位於該矩形中心。 爲達到較好之光學效果，相鄰兩微凸起214之間距優選 • " - is 0. 025毫米至2毫米。本實施例中，徵凸起214爲正四棱 錐狀凸起，且微凸起214之其中:兩相對側面所成之夾角Θ 優選60度至120度。球面凸起216之球面半徑優選0. 01毫 米至2毫米，每一球面凸起216之高度優選0.01毫米至2 毫米。光學板20之厚度優選0. 5毫米至5毫米。 可以理解，微凸起214之形狀並不限於四棱錐狀凸起，也 可爲三面錐狀凸起、多面錐台狀凸起等，即微凸起214之 結構可概括爲包括至少三個相互連接之側面，每一側面 之水平寬度沿遠離出光面215之方向逐漸縮小。 請一併參閱圖6與圖7，本發明較佳實施例二提供一背光 表單編號Α0101 第7頁/共22頁 0993454762-0 1345077 099年12月20日梭· 模組200 ’該背光模組200包括一框架201、一反射板202 、一擴散板203、複數側光式點光源205以及本發明較佳 實施例一所述之光學板20。框架201包括一長方形底板 2011及四個從該底板2011邊緣向其同一側垂直延伸之側 壁2013 ’四個側壁2013相互連接並與底板2011形成一腔 體2 0 8。擴散板2 0 3設置於複數侧壁2 013頂部。複數點光 源205設置於底板2011，且每一點光源205具有一發光部 2051。反射板202具有與點光源205對應之複數通孔2021 。反射板202與光學板20依次設置於底板2011與擴散板 203之間且光學板20之光學板單元21之出光面215面向擴 散板2 0 3。點光源2 0 5之發:穿:增反射板2 〇 2 之通孔2021並位於光學板。該點光 源205優選發光二極體。從IT先賞2(Γ5#ϋ光線於腔體 208内充分混合後可經過擴散板203出射。 [0015] 點光源205從出光部2051弩出之光線藉由光源容納部2 J j 之内側壁直接進入光學板2色内脊。、由於篆面凸起216具有 變化之表面結構’使得光崞功t系，拳择20内傳輸至球面凸 起216時，部分原來於未設有球面凸起216之光學板2〇内 全反射傳播之光線可被球面凸起216調節後沿特定之方向 折射出射，例如將部分光線折射至靠近垂直擴散板203方 向之正面方向出射’從而增加正面出射之光線，避免於 相鄰之點光源2 0 5之間之上方産生暗區，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213 設置有微凸起214 ’部分原來於未设有微凸起214之光學 板20内全反射傳播之光線可被其調郎後從底面213出射， 096115956 表單編號A0101 第8頁/共22頁 0993454762-0 1345077 099年12月20日修正替換英 於反射板202之輔助作用下，此部分光線多次折射後朝向 擴散板203出射。故背光模組200之光學利用率也將進一 步提高。更進一步地，由於採用側光式點光源205，點光 源205所發射之光線大部分於光學板20内向四周傳播，故 點光源205被轉變成面光源。點光源205正上方之區域將 避免出現亮點’此設計爲縮小擴散板203與光學板20之間 之距離成爲可能’從而，減小背光模組200之厚度。 [0016] 可以理解，點光源205之發光部2051上方還可設置反射片 207。該反射片207可使得點光源205直接正面出射至擴 散板203之光線被反射片.207減弱，故可避免於點光源 205之正上方之出現亮點，提高%光模組200之出 Γ Λ 光均勻性。可以理解’還可於點:光源2Ί)5之發光部2051上 1 Κ人 直接設置反射片或反射層以替代反射片207,同樣可達到 較佳之光學效果° [0017] 可以理解’爲使得該背光模雄200於特定之視覺範圍内具 有較高之亮度’還可於擴蘇板名031 土設置一稜鏡片204。 另，本實施例之反射板202$#略，尤其當框架201爲高 反射材料製成或底板2011塗覆高反射塗層時》 [0018] 請一併參閱圖8、圖9與圖10，本發明較佳實施例三提供 一種光學板。該光學板30與較佳實施例一之光學板20 相似，其不同在於.光學板30爲一光學板單元。該光學 板單元包括一底面313及一與底面313相對之出光面315 。底面313開a又有光源谷納部311，該光源容納部311爲 從底面313貫穿至出光面315之通孔，且該光源容納部 096115956 311開設於底面31 3之中心。底面313形成有複數位於光 表單编號A0101 第9頁/共22頁 0993454762-0 1345077 099年12月20日按正替換頁 源容納部311四周之微凸起314，該複數微凸起314於底 面313呈陣列排佈。出光面315形成有複數球面凸起316 ，該複數球面凸起31 6於出光面31 5呈陣列排佈。 [0019] 請參閱圖11，本發明較佳實施例四提供一種光學板40。 該光學板40與較佳實施例三之光學板30相似，其不同在 於：開設於光學板40之底面413之光源容納部411爲盲孔 。並且，盲孔底部可直接塗覆高反射層，這樣，光學板 40應用於背光模組時，點光源之發光部可直接設置於光 源容納部411，無需額外設置反射片即可達到較佳之光學 效果。When the HSI is directed to the diffusion plate, the light emitted from the point source directly enters the inside of the optical plate through the inner side wall of the housing portion of the light source 5. Since the spherical protrusion of the second surface has a varying surface structure, when the light is transmitted to the spherical protrusion in the optical plate, part of the light which is originally totally reflected in the optical plate not provided with the spherical protrusion can be convexly convex. After adjustment, it refracts toward the high-diffusion plate, and 1 * ί increases the outgoing light. Further, since the first surface of the optical plate is provided with micro-protrusions, a part of the light which is originally totally reflected in the optical plate not provided with the micro-protrusions can be adjusted and then emitted from the first surface, and then the portion of the light is emitted. It can be emitted toward the diffusion plate by multiple refractions. Therefore, the optical utilization of the backlight module will be further improved. Similarly, when the first surface faces the diffusion plate, the optical utilization of the backlight module is further improved by the action of the micro protrusions and the spherical protrusions. Further, due to the use of the edge-light point source, the point source is converted into a surface source by the action of the optical plate. The backlight module using the optical plate has the advantage of a small thickness. 096115956 Form No. 101 0101 Page 6 / Total 22 Pages 0993454762-0 1345077 [0010] [0012] [0014] 096115956 December 20, 2010, the replacement page [Embodiment] The backlight module and the optical plate of the present invention are further described in detail in the embodiments. Referring to Figures 3, 4 and 5 together, a preferred embodiment of the present invention provides an optical plate 20. The optical plate 20 has a square shape and includes a plurality of optical plate units 21 which are closely arranged in an array. Each of the optical plate units 21 includes a bottom surface 213 and a light emitting surface 215 opposite to the bottom surface 213. A light source housing portion 211 is opened in the center of the bottom surface 213. In the present embodiment, the light source housing portion 211 is a through hole penetrating from the bottom surface 21 3 to the light exit surface 21 5 . The bottom surface 21 3 is formed with a plurality of micro protrusions 214 located around the light source housing portion 211. The light-emitting surface 21 5 forms a plurality of spherical protrusions 216 located around the light source housing portion 211. In the present embodiment, the plurality of micro-', *.; protrusions 214 and the plurality of spherical protrusions 216 are arranged in a rectangular shape on the corresponding surface, and the light source accommodating portion 211 is located in the rectangle center. In order to achieve a better optical effect, the distance between adjacent two microprotrusions 214 is preferably " - is 0. 025 mm to 2 mm. In this embodiment, the trap 214 is a regular quadrangular pyramid-shaped projection, and the angle Θ between the two opposite sides of the micro-bump 214 is preferably 60 to 120 degrees. The spherical radius of the spherical projection 216 is preferably 0.01 mm to 2 mm, and the height of each spherical projection 216 is preferably 0.01 mm to 2 mm. 5毫米至五毫米。 The thickness of the optical plate 20 is preferably 0. 5 mm to 5 mm. It can be understood that the shape of the micro protrusions 214 is not limited to the quadrangular pyramid-shaped protrusions, and may be a three-sided pyramid-shaped protrusion, a multi-faceted frustum-like protrusion or the like, that is, the structure of the micro protrusions 214 may be summarized as including at least three mutual On the side of the connection, the horizontal width of each side is gradually reduced in a direction away from the light exit surface 215. Referring to FIG. 6 and FIG. 7 together, a preferred embodiment of the present invention provides a backlight form number Α 0101, page 7 / total 22 pages 0993454762-0 1345077 December 20, 2008 shuttle module 200 'the backlight module 200 includes a frame 201, a reflecting plate 202, a diffusing plate 203, a plurality of side-light point sources 205, and an optical plate 20 according to a preferred embodiment of the present invention. The frame 201 includes a rectangular bottom plate 2011 and four side walls 2013 that extend vertically from the edge of the bottom plate 2011 toward the same side. The four side walls 2013 are interconnected and form a cavity 208 with the bottom plate 2011. The diffuser plate 2 0 3 is disposed on the top of the plurality of side walls 2 013. The plurality of point light sources 205 are disposed on the bottom plate 2011, and each of the point light sources 205 has a light emitting portion 2051. The reflection plate 202 has a plurality of through holes 2021 corresponding to the point light source 205. The reflecting plate 202 and the optical plate 20 are sequentially disposed between the bottom plate 2011 and the diffusing plate 203, and the light emitting surface 215 of the optical plate unit 21 of the optical plate 20 faces the diffusing plate 203. Point light source 2 0 5: Wear: the through hole 2021 of the reflection plate 2 〇 2 is located on the optical plate. The point source 205 is preferably a light emitting diode. From the IT first prize 2 (Γ5#ϋ light is sufficiently mixed in the cavity 208 and can be emitted through the diffusion plate 203. [0015] The light emitted from the light exit portion 2051 by the point light source 205 is passed through the inner side wall of the light source housing portion 2 J j Directly enter the inner ridge of the optical plate 2, because the surface protrusion 216 has a varying surface structure 'such that the optical work t system, when the ball is transferred to the spherical protrusion 216 within the boxing 20, part of the original is not provided with a spherical protrusion The light transmitted by the total reflection in the optical plate 2 of 216 can be adjusted by the spherical protrusion 216 and then refracted in a specific direction, for example, refracting part of the light to the front direction of the direction perpendicular to the vertical diffusion plate 203, thereby increasing the light emitted from the front side. In order to avoid the dark area above the adjacent point light source 200, the light uniformity of the backlight module 200 is improved. Further, since the bottom surface 213 of the optical plate 2 is provided with the micro protrusion 214' The light transmitted by the total reflection in the optical plate 20, which is not provided with the micro-bumps 214, can be illuminated from the bottom surface 213, 096115956 Form No. A0101 Page 8 of 22 Page 0993454762-0 1345077 Revised December 20, 099 Replace the English reflection Under the auxiliary action of the plate 202, the portion of the light is refracted multiple times and then emitted toward the diffusion plate 203. Therefore, the optical utilization of the backlight module 200 is further improved. Further, since the edge light source 205 is used, the point source 205 Most of the emitted light propagates around the optical plate 20, so that the point source 205 is converted into a surface source. The area directly above the point source 205 will avoid bright spots. This design is to reduce the gap between the diffusion plate 203 and the optical plate 20. The distance is made possible to reduce the thickness of the backlight module 200. [0016] It can be understood that a reflective sheet 207 may be disposed above the light emitting portion 2051 of the point light source 205. The reflective sheet 207 may cause the point source 205 to directly exit to the front surface of the light source 205. The light of the plate 203 is weakened by the reflection sheet 207, so that the bright spots appearing directly above the point light source 205 can be avoided, and the uniformity of the % Λ light of the % light module 200 can be improved. It can be understood that 'the point can be: the light source 2 Ί) The light-emitting portion 2051 of the light-emitting portion 2051 directly sets a reflection sheet or a reflective layer instead of the reflection sheet 207, and the same optical effect can be achieved. [0017] It can be understood that the backlight pattern is 200 Within the visual field has a higher brightness' to further expand the name of Sue plate 031 Prism sheet 204 provided with a soil. In addition, the reflective plate 202$# of the present embodiment is omitted, especially when the frame 201 is made of a highly reflective material or the bottom plate 2011 is coated with a highly reflective coating. [0018] Please refer to FIG. 8, FIG. 9 and FIG. 10 together. A preferred embodiment of the present invention provides an optical plate. The optical plate 30 is similar to the optical plate 20 of the preferred embodiment 1 except that the optical plate 30 is an optical plate unit. The optical plate unit includes a bottom surface 313 and a light exit surface 315 opposite to the bottom surface 313. The bottom surface 313 is opened and has a light source mura portion 311. The light source accommodating portion 311 is a through hole penetrating from the bottom surface 313 to the light exit surface 315, and the light source accommodating portion 096115956 311 is opened at the center of the bottom surface 313. The bottom surface 313 is formed with a plurality of micro protrusions 314 which are located on the periphery of the page source receiving portion 311, which are located on the light form number A0101, page 9 / page 22, 0993454762-0 1345077, December 20, 099. The bottom surfaces 313 are arranged in an array. The light-emitting surface 315 is formed with a plurality of spherical protrusions 316, and the plurality of spherical protrusions 316 are arranged in an array on the light-emitting surface 315. Referring to FIG. 11, a preferred embodiment 4 of the present invention provides an optical plate 40. The optical plate 40 is similar to the optical plate 30 of the third embodiment except that the light source housing portion 411 formed on the bottom surface 413 of the optical plate 40 is a blind hole. Moreover, the bottom of the blind hole can be directly coated with the high-reflection layer, so that when the optical plate 40 is applied to the backlight module, the light-emitting portion of the point light source can be directly disposed in the light source receiving portion 411, and the optical device can be better without additional reflective film. effect.
[0020] 請參閱圖1 2，本發明較佳 該光學板50與較佳實施例三费板，其不同在 於：形成於光學板50之底面513之微凸起之兩相對側面之 夾角以及相鄰微凸起形成之底部夾角均被圓角化，分別 形成圓角R1和R2。該R1和1?2之圓(声之取值i範圍優選爲大 ' - έ - ·*·'s. . 於0且小於或等於1. 1毫米P被#•舞化％微凸起可使出射 光束之出射角度之變化趨於採用光學板50之背 光模組之出光均勻性提高。可以理解，圓角也可單獨形 成可於微凸起之兩相對側面之夾角以及相鄰微凸起形成 之底部夾角。 [0021] 請參閱圖13，本發明較佳實施例六提供一種光學板60。 該光學板60與較佳實施例三之光學板30相似，其不同在 於：光學板60之出光面615上之複數球面凸起616爲隨機 排佈，該隨機排佈便於球面凸起616之製備。 096115956 表單編號A0101 第10頁/共22頁 0993454762-0 1345.077 099年12月20日修正替換頁 [0022] 請參閱圖14，本發明較佳實施例七提供一種光學板70。 該光學板7 0與較佳實施例三之光學板3 0相似，其不同在 於：光學板70爲一正八邊形。 [0023] 請參閱圖15，本發明較佳實施例八提供一種光學板80。 該光學板80與較佳實施例三之光學板30相似，其不同在 於：光學板80爲圓形，光學板80之出光面815上之複數球 面凸起81 6大小不一，且球面凸起81 6與光源容納部811 距離越遠，球面凸起81 6之球面半徑越大。這樣，距離光 源容納部811較遠部分區域之球面凸起816可調節相對較 多之光線，進一步增加採用光學板80之背光模組之均勻 性。可以理解，於複數球面凸起之球面半徑相同之情況 下，藉由調整距離光源容納'部較遠部分區域之球面凸起 與距離光源容納部較近部分區域之球面凸起之相對密度 ，以使距離光源容納部較遠之部分區域出射相對較多之 光線，進一步增加背光模組之均勻性。 [0024] 可以理解，本發明之光學板也可以係三角形、五邊形、 六邊形或者其他形狀，甚至還可爲楔形。複數球面凸起 可爲緊密排佈、間隔排佈或以光源容納部爲中心對稱排 佈，其中中心對稱排佈有利於光線於各個方向上均勻分 散。 [0025] 可以理解，本發明光學板之球面凸起和微凸起可互換設 置於出光面和底面，也即於背光模組中，設置有球面凸 起之表面可面向擴散板設置，設置有微凸起之表面也可 面向擴散板設置。综上所述，假設本發明光學板之底面 (或出光面）定義爲第一表面，與該底面（或出光面） 096115956 表單編號A0101 第11頁/共22頁 0993454762-0 1345077 099年12月20日核正替換頁 相對之出光面（或底面）定義爲第二表面，那麼，第一 表面形成有複數微凸起，第二表面形成有複數球面凸起 〇 [0026] 可以理解，爲提高上述背光模組之亮度或用不同顏色之 發光二極體混光形成白光，上述光學板或光學板單元之 光源容納部可爲複數，以使光學板或光學板單元可對應 容納複數光源。 [0027] 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iil範内。 /· ，-‘ 【圖式簡單說明】 [0028] 圖1係習知技術之背光模組之剖面示意圖。 [0029] 圖2係圖1局部II所示之放大圖。 [0030] 圖3係本發明較佳實施例一之光學板之立體圖。 [0031] 圖4係圖3所示光學板之另一視覺之-立體圖。 [0032] 圖5係圖3所示光學板沿V-V線之剖面示意圖。 [0033] 圖6係本發明較佳實施例二之背光模組之剖面示意圖。 [0034] 圖7係圖6局部VII所示之放大圖。 [0035] 圖8係本發明較佳實施例三之光學板之立體圖。 [0036] 圖9係圖8所示光學板之另一視覺之立體圖。 [0037] 圖10係圖8所示光學板沿X-X線之剖面示意圖。 096115956 表單編號A0101 第12頁/共22頁 0993454762-0 1345077 099年12月20日核正替換頁 [0038] 圖11係本發明較佳實施例四之光學板之剖面示意圖。 [0039] 圖12係本發明較佳實施例五之光學板之剖面示意圖。 [0040] 圖13係本發明較佳實施例六之光學板之俯視圖。 [0041] 圖14係本發明較佳實施例七之光學板之俯視圖。 [0042] 圖15係本發明較佳實施例八之光學板之俯視圖。 【主要元件符號說明】 [0043] (本發明） [0044] 光學板：20、30、40、 50、60 ' 70、80. [0045] 光學板單元：21 [0046] 光源容納部：211、311 、4 IT、811 [0047] 底面：213、313、413 ' 513 [0048] 微凸起：214、314 [0049] 出光面：215、315、615、815 [0050] 球面凸起：216、316、 616 、 816 [0051] 背光模組：200 [0052] 框架：201 [0053] 底板：2011 [0054] 側壁：2013 [0055] 反射板：202 [0056] 通孔：2021 表單編號A0101 第13頁/共22頁 096115956 0993454762-0 1345077 099年12月20日梭正替换頁 [0057] 擴散板：203 [0058] 稜鏡片：204 [0059] 點光源：2 0 5 [0060] 發光部：2051 [0061] 反射片：207 [0062] 腔體：208Referring to FIG. 12, the optical plate 50 of the present invention is different from the preferred embodiment of the third embodiment. The difference is that the angles and phases of the opposite sides of the microprotrusions formed on the bottom surface 513 of the optical plate 50 are different. The bottom corners formed by the adjacent microprotrusions are rounded to form rounded corners R1 and R2, respectively. The circle of R1 and 1?2 (the range of the value of sound i is preferably large '- έ - ·*·'s. . at 0 and less than or equal to 1. 1 mm P is #•舞化% micro-bumping The variation of the exit angle of the outgoing beam tends to increase the uniformity of the light emitted by the backlight module of the optical plate 50. It can be understood that the rounded corners can also form an angle between the opposite sides of the microprotrusion and the adjacent microprotrusions. The bottom corner is formed. [0021] Referring to Figure 13, a preferred embodiment of the present invention provides an optical plate 60. The optical plate 60 is similar to the optical plate 30 of the preferred embodiment 3, except that the optical plate 60 is The plurality of spherical protrusions 616 on the light-emitting surface 615 are randomly arranged, and the random arrangement facilitates the preparation of the spherical protrusions 616. 096115956 Form No. A0101 Page 10 of 22 0993454762-0 1345.077 Correction replacement on December 20, 099 Referring to FIG. 14, a preferred embodiment of the present invention provides an optical plate 70. The optical plate 70 is similar to the optical plate 30 of the preferred embodiment 3, except that the optical plate 70 is a positive eight. [0023] Referring to FIG. 15, a preferred embodiment of the present invention provides a light. The optical plate 80 is similar to the optical plate 30 of the third embodiment except that the optical plate 80 is circular, and the plurality of spherical protrusions 81 6 on the light exit surface 815 of the optical plate 80 are different in size, and The farther the spherical protrusion 81 6 is from the light source accommodating portion 811, the larger the spherical radius of the spherical protrusion 81 6 is. Thus, the spherical protrusion 816 from the farther portion of the light source accommodating portion 811 can adjust relatively more light, further Increasing the uniformity of the backlight module using the optical plate 80. It can be understood that, in the case where the spherical radius of the plurality of spherical protrusions is the same, the spherical protrusion and the distance light source housing portion are accommodated by adjusting the distance from the light source to accommodate the farther portion of the portion The relative density of the spherical protrusions in the near partial region is such that a relatively large portion of the light from the light source receiving portion emits a relatively large amount of light, further increasing the uniformity of the backlight module. [0024] It can be understood that the optical plate of the present invention It can also be triangular, pentagonal, hexagonal or other shapes, or even wedge-shaped. The complex spherical protrusions can be arranged closely, spaced apart or centered on the light source housing. It is said that the central arrangement is symmetrical, and the light is uniformly dispersed in all directions. [0025] It can be understood that the spherical protrusions and micro protrusions of the optical plate of the present invention are interchangeably disposed on the light emitting surface and the bottom surface, that is, in the backlight. In the module, the surface provided with the spherical protrusion may be disposed facing the diffusion plate, and the surface provided with the micro protrusion may also be disposed facing the diffusion plate. In summary, it is assumed that the bottom surface (or the light exit surface) of the optical plate of the present invention is defined as The first surface, and the bottom surface (or illuminating surface) 096115956 Form No. A0101 Page 11 / Total 22 Pages 0993454762-0 1345077 December 20, 099 The replacement surface of the nuclear replacement surface (or the bottom surface) is defined as the second surface Then, the first surface is formed with a plurality of micro-protrusions, and the second surface is formed with a plurality of spherical protrusions. [0026] It can be understood that white light is formed to increase the brightness of the backlight module or to mix light with different colors of the LEDs. The light source housing portion of the optical plate or the optical plate unit may be plural, so that the optical plate or the optical plate unit can accommodate a plurality of light sources correspondingly. [0027] 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 application. BRIEF DESCRIPTION OF THE DRAWINGS [0028] FIG. 1 is a schematic cross-sectional view of a conventional backlight module. 2 is an enlarged view of a portion II of FIG. 1. 3 is a perspective view of an optical plate according to a preferred embodiment of the present invention. 4 is another visual perspective view of the optical plate shown in FIG. 3. 5 is a schematic cross-sectional view of the optical plate shown in FIG. 3 taken along line V-V. 6 is a cross-sectional view of a backlight module according to a second embodiment of the present invention. 7 is an enlarged view of a portion VII of FIG. 6. 8 is a perspective view of an optical plate according to a third embodiment of the present invention. [0036] FIG. 9 is another perspective view of the optical plate of FIG. 8. 10 is a schematic cross-sectional view of the optical plate shown in FIG. 8 taken along line X-X. [0037] FIG. 096115956 Form No. A0101 Page 12 of 22 0993454762-0 1345077 December 20, 2010, NUCLEAR REPLACEMENT PAGE [0038] Figure 11 is a cross-sectional view of an optical plate in accordance with a preferred embodiment of the present invention. 12 is a schematic cross-sectional view showing an optical plate according to a fifth embodiment of the present invention. 13 is a plan view of an optical plate according to a preferred embodiment of the present invention. 14 is a plan view of an optical plate according to a seventh embodiment of the present invention. 15 is a plan view of an optical plate according to a preferred embodiment of the present invention. [Main component symbol description] [0043] Optical plate: 20, 30, 40, 50, 60' 70, 80. [0045] Optical plate unit: 21 [0046] Light source housing: 211, 311, 4 IT, 811 [0047] bottom surface: 213, 313, 413 ' 513 [0048] micro-bumps: 214, 314 [0049] light-emitting surface: 215, 315, 615, 815 [0050] spherical protrusion: 216, 316, 616, 816 [0051] backlight module: 200 [0052] frame: 201 [0053] bottom plate: 2011 [0054] side wall: 2013 [0055] reflector: 202 [0056] through hole: 2021 form number A0101 13th Page / Total 22 pages 096115956 0993454762-0 1345077 December 20, 099 Shuttle replacement page [0057] Diffusion plate: 203 [0058] Bracts: 204 [0059] Point light source: 2 0 5 [0060] Light-emitting part: 2051 [0061] Reflector: 207 [0062] Cavity: 208
096115956 表單編號A0101 第14頁/共22頁 0993454762-0096115956 Form No. A0101 Page 14 of 22 0993454762-0