1344022 100年04.月22日按正替換頁 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。 【先前技術】 [0002] 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。 _ [0003] 請參見圖1，所示爲一種習知之背光模組100，其包括框 架11、反射板12、擴散板13、稜鏡片14及發光二極體15 。框架11包括一長方形底板111及從該底板Π1邊緣向其 同一側垂直延伸之四側壁Π3。底板111與四側壁Π3共 同形成一腔體115。發光二極體15包括出光部151與基部 153，基部153與電路板16相連並固定於底板111。擴散·， 板13與稜鏡片14依次設置於複數側壁Η 3頂部。反射板 12爲一小框體結構，其可配置於框架11内部。反射板12 《 之底部開設有與發光二極體15相對應之通孔（圖未標） ，發光二極體15之出光部151穿過相應通孔。發光二極體 15之基部153頂持該反射板12。 [0004] 工作時，發光二極體15産生之光線被反射板12反射進入 擴散板13 ’於擴散板13中被均句擴散後光線繼續進入稜 鏡片14，於稜鏡片14之作用下，出射光線發生一定程度 之聚集，使背光模組100於特定視角範圍内之亮度提高。 [0005] 然而’由於發光二極體15爲點光源’其到達擴散板13上 096125581 表單編號 A0101 第 4 頁/共 22 頁 1003141175-0 100年04月22日核正替换頁 1344022 各處之距離大小不相等，位於發光二極體1 5正上方之擴 散板13單位區域所接受光較多，位於發光極管15四周之 擴散板13單位區域所接受光較少，故容易於發光二極體 15正上方之區域形成亮區，而於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。爲此，通常需於 發光二極體15之正上方設置反射片17，以控制發光二極 體15正上方之出光量。發光部151上方增加設反射片17之 設計，可一定程度上減弱發光二極體15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】 [0006] 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。 [0007] —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Λ起。每一封閉式V型凸起由 四凸邊圍成矩形狀，且該複數封閉式V型凸起均以該光源 φ 容納部爲中心，其相應凸邊相互平行。該第二表面形成 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二表面之方向逐漸 縮小，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。 [0008] —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 ;該至少一具有出光部之點光源固定於該底板；該擴散 096125581 表單編號 Α0101 第 5 頁/共 22 頁 1003141175-0 -1344022 1〇0年04月22日按正替换頁 板設置於該複數側壁之頂部並蓋住該腔體；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，每一封閉式V 型凸起由四凸邊圍成矩形狀，且該複數封閉式V型凸起均 以該光源容納部爲中心，其相應凸邊相互平行；該第二 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二表面之 方向逐漸縮小，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。 、.1344022 100年04.22月22日正正页页6, invention description: [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. [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 is shown, which includes a frame 11, a reflector 12, a diffuser 13, a cymbal 14, and a light-emitting diode 15. The frame 11 includes a rectangular bottom plate 111 and four side walls 3 extending perpendicularly from the edge of the bottom plate 1 toward the same side thereof. The bottom plate 111 and the four side walls 3 together form a cavity 115. The light-emitting diode 15 includes a light-emitting portion 151 and a base portion 153 which is connected to the circuit board 16 and is fixed to the bottom plate 111. Diffusion·, the plate 13 and the cymbal 14 are sequentially disposed on the top of the plurality of side walls Η3. The reflecting plate 12 is a small frame structure which can be disposed inside the frame 11. The bottom of the reflector 12 is provided with a through hole corresponding to the LED 15 (not shown), and the light exiting portion 151 of the LED 15 passes through the corresponding through hole. The base 153 of the light-emitting diode 15 holds the reflector 12 thereon. [0004] In operation, the light generated by the light-emitting diode 15 is reflected by the reflecting plate 12 into the diffusing plate 13'. After being diffused in the diffusing plate 13, the light continues to enter the cymbal 14 and is emitted by the cymbal 14 The light is concentrated to a certain extent, so that the brightness of the backlight module 100 within a certain viewing angle range is increased. [0005] However, since the light-emitting diode 15 is a point light source, it reaches the diffusion plate 13 on the 096125581. Form No. A0101 Page 4 of 22 Page 3314141175-0 The date of the replacement of the page is 13404022 The unit is not equal in size, and the unit of the diffusing plate 13 located directly above the light-emitting diode 15 receives more light, and the unit of the diffusing plate 13 located around the light-emitting diode 15 receives less light, so it is easy to be used for the light-emitting diode. The area directly above the 15 forms a bright area, and the dark areas around the upper area form a dark area, which affects the light uniformity of the backlight module 100. For this reason, it is usually necessary to provide a reflection sheet 17 directly above the light-emitting diode 15 to control the amount of light emitted directly above the light-emitting diode 15. The design of the reflective sheet 17 is added to the upper portion of the light-emitting portion 151, so that the bright region directly above the light-emitting diode 15 can be weakened to some extent, but the backlight module 100 still has the disadvantage of uneven light emission. SUMMARY OF THE INVENTION [0006] 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 including a first surface and a second surface opposite the first surface. The first surface is formed with a plurality of closed V-shaped picks. Each of the closed V-shaped projections is surrounded by four convex edges, and the plurality of closed V-shaped projections are centered on the light source φ receiving portion, and the corresponding convex edges are parallel to each other. The second surface is formed with a plurality of micro-protrusions, each micro-protrusion includes at least three interconnected sides, a horizontal width of each side is gradually reduced in a direction away from the second surface, and the first surface and the second surface At least one surface of the surface is provided with a light source receiving portion. [0008] 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 and the bottom plate Forming a cavity; the at least one point source having the light exiting portion is fixed to the bottom plate; the diffusion 096125581 Form No. 1010101 Page 5 of 22 1003141175-0 -1344022 Pressing the page board by April 22 The optical plate includes at least one optical plate unit, and the optical plate unit includes a first surface and opposite to the first surface. a second surface, the first surface is formed with a plurality of closed V-shaped protrusions, each of the closed V-shaped protrusions is surrounded by four convex edges, and the plurality of closed V-shaped protrusions are respectively used by the light source receiving portion Centered, the respective convex edges are parallel to each other; the second surface is formed with a plurality of micro-protrusions, each micro-protrusion includes at least three mutually connected sides, and the horizontal width of each side gradually decreases away from the second surface And reducing, and at least one of the first surface and the second surface is provided with a light source receiving portion; the light emitting portion of the point light source is correspondingly disposed in the light source receiving portion. ,
[0009] 上述背光模組之光學板之光學板丨專元包括光源容納部、 形成於第一表面上之複數封閉式V型凸起與形成於第二表 面之複數微凸起。點光源之出光部容納於光源容納部， 當第二表面面向擴散板時，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。由於第二表面 之微凸起具有變化之表面結構，使得光線於光學板内傳 | 輸至微凸起時，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微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，由於光學板之第 一表面設置有封閉式V型凸起，部分原來於未設有封閉式 V型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，藉由封閉式V型凸起 096125581 表單編號A0101 第6頁/共22頁 1003141175-0 1344.022 - 100年04月22日核正替换頁 與微凸起之作用，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，因而採用該光學板之 背光模組不會因點光源至擴散板之距離過小而出現亮點 ，無需考慮點光源至擴散板之距離，故，採用該光學板 之背光模組具有厚度小之優點。 【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，所示爲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。四側壁213與底板211共同形成一腔體215。 擴散板23設置於四側壁213頂部並蓋住該腔體215。腔體 21 5可收容點光源25、反射板22及光學板20等元件。從 φ 點光源25發出之光線於腔内21 5充分混合後可經過擴散板 23出射。 [0012] 請同時參見圖3至圖5，光學板20爲矩形透明板，其包括 一出光面2012、一與該出光面2012相對之底面2013。底 面2013中央開設有光源容納部2014，本實施例中，光源 容納部2014爲從底面2013貫穿至出光面2012之通孔。出 光面2012形成有位於光源容納部2014四周之微凸起2015 。底面2013形成複數封閉式V型凸起2016，每一封閉式V 型凸起2016由四凸邊圍成矩形狀，且複數封閉式V型凸起 096125581 表單編號 A0101 第 7 頁/共 22 頁 1003141175-0 1344022 100年04月22日核正替換頁 2016均以光源容納部2014爲中心，其相應凸邊相互平行 〇 [0013] 本實施例中，微凸起2015呈規則陣列排佈，相鄰兩微凸 起2015之間距優選0. 025毫米至2毫米。爲達到較好之光 學效果，本實施例中微凸起2015爲正四稜錐狀凸起，且 微凸起2015之其中兩相對側面所成之夾角α優選60度至 120度。複數封閉式V型凸起2016可間隔排佈，也可爲緊 密連接排佈。故，相鄰封閉式V型凸起2016相應凸邊之間 距可優選0. 025毫米至2毫米。另，每一封閉式V型凸起 φ 201 6之頂角/3之較佳取值範圍爲60至120度。光學板20 之厚度優選0. 5毫米至5毫米，槽叙;知技術之導光板 ，具有重量較輕之優點。 [0014] 可以理解，微凸起2015之形狀並不限於四稜錐狀凸起， 也可爲三面錐狀凸起、多面錐台狀凸起等，即微凸起 2015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2012之方向逐漸縮小。 [0015] 請再參閱圖2，側光式點光源25優選爲側光式發光二極體 ，其包括一基部253與一固定於基部253上方之出光部 251。點光源25藉由電路板26固定於底板211。光學板20 設置於腔體215内，其出光面2012面向擴散板23。點光 'CS O C ib ΛγΤ Ο C 1 ^ ύΜ Α-Κ >!·*. ίΆ. Χη Ο Π 'IS Δμ ΑΓΓ Ο Π 1 ^ rin ✓//Jx Li Ο |Χ| 7L» 口Γ 厶 d 上廿次门于似 C υ 〜7L» 你丁、廿、Τ*Π 口Γ 乙 υ 1 1 r 1 。反射板22開設有與點光源25對應之通孔221。該反射板 22設置於光學板20之底面2013之下方，點光源25之出光 部251穿過相應通孔221。 096125581 表單編號Α0101 第8頁/共22頁 1003141175-0 1344022 [0016][0009] The optical plate unit of the optical plate of the backlight module includes a light source receiving portion, a plurality of closed V-shaped protrusions formed on the first surface, and a plurality of micro protrusions formed on the second surface. The light exiting portion of the point source is housed in the light source receiving portion, and when the second surface faces the diffusing plate, the light emitted from the point source directly enters the inside of the optical plate through the inner side wall of the light source receiving portion. Since the micro-protrusions of the second surface have a varying surface structure, when the light is transmitted to the micro-protrusions in the optical plate, part of the light that is originally totally reflected in the optical plate not provided with the micro-protrusions can be slightly After the protrusion is adjusted, it is refracted toward the diffusing plate, thereby increasing the outgoing light. Further, since the first surface of the optical plate is provided with a closed V-shaped protrusion, a part of the light originally transmitted by the total reflection in the optical plate not provided with the closed V-shaped protrusion can be adjusted and then emitted from the first surface. Then, this part of the light 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 closed V-shaped protrusion 096125581 Form No. A0101 Page 6 / Total 22 pages 1003141175-0 1344.022 - April 22, 100 Nuclear replacement page and micro-bump As a result, the optical utilization of the backlight module will be further improved. Furthermore, since the edge light source is used, the point light source is converted into a surface light source by the action of the optical plate, so that the backlight module using the optical plate does not appear bright because the distance from the point source to the diffusion plate is too small. There is no need to consider the distance from the point source to the diffusion plate, so the backlight module using the optical plate has the advantage of small thickness. Embodiments [0010] 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. [0011] 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 diffuser panel 23, a side light point source 25, and a 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 211 toward the same side and connected to each other. The four side walls 213 and the bottom plate 211 together form a cavity 215. The diffuser plate 23 is disposed on the top of the four side walls 213 and covers the cavity 215. The cavity 21 5 can accommodate components such as the point source 25, the reflector 22, and the optical plate 20. The light emitted from the φ point light source 25 is sufficiently mixed in the cavity 21 5 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 2012 and a bottom surface 2013 opposite to the light emitting surface 2012. In the center of the bottom surface 2013, a light source housing portion 2014 is opened. In the present embodiment, the light source housing portion 2014 is a through hole penetrating from the bottom surface 2013 to the light exit surface 2012. The light exit surface 2012 is formed with micro bumps 2015 located around the light source housing portion 2014. The bottom surface 2013 forms a plurality of closed V-shaped projections 2016, each closed V-shaped projection 2016 is surrounded by four convex edges, and a plurality of closed V-shaped projections 096125581 Form No. A0101 Page 7 of 22 1003141175 -0 1344022 On April 22, 100, the nuclear replacement page 2016 is centered on the light source housing portion 2014, and the corresponding convex edges are parallel to each other. [0013] In this embodiment, the micro protrusions 2015 are arranged in a regular array, adjacent to each other. 025毫米至2毫米。 The distance between the two micro-protrusions 2015 is preferably 0. 025 mm to 2 mm. In order to achieve a better optical effect, in the embodiment, the micro-protrusions 2015 are positive quadrangular pyramid-shaped protrusions, and the angle α formed by two opposite sides of the micro-protrusions 2015 is preferably 60 degrees to 120 degrees. The plurality of closed V-shaped projections 2016 can be arranged at intervals or in a tightly connected arrangement. 025毫米至2毫米。 Therefore, the adjacent closed V-shaped protrusions 2016 corresponding rim spacing may preferably be 0. 025 mm to 2 mm. Further, the apex angle /3 of each of the closed V-shaped projections φ 201 6 preferably ranges from 60 to 120 degrees. The thickness of the optical plate 20 is preferably 0.5 mm to 5 mm, and the light guide plate of the prior art has the advantages of light weight. [0014] It can be understood that the shape of the micro-protrusions 2015 is not limited to a quadrangular pyramid-shaped protrusion, but may also be a three-sided pyramid-shaped protrusion, a multi-faceted frustum-shaped protrusion, or the like, that is, the structure of the micro-protrusion 2015 may be summarized as including At least three mutually connected sides, the horizontal width of each side is gradually reduced in a direction away from the light exit surface 2012. Referring to FIG. 2 again, the edge-light point source 25 is preferably an edge-lit LED comprising a base 253 and a light exit portion 251 fixed above the base 253. The point source 25 is fixed to the bottom plate 211 by the circuit board 26. The optical plate 20 is disposed in the cavity 215, and its light emitting surface 2012 faces the diffusion plate 23. Spot light 'CS OC ib ΛγΤ Ο C 1 ^ ύΜ Α-Κ >!·*. Ά. Χη Ο Π 'IS Δμ ΑΓΓ Ο Π 1 ^ rin ✓//Jx Li Ο |Χ| 7L» 口Γ 厶d The upper door is like C υ ~7L» You Ding, 廿, Τ*Π 口Γ υ 1 1 r 1 . The reflection plate 22 is provided with a through hole 221 corresponding to the point light source 25. The reflector 22 is disposed below the bottom surface 2013 of the optical plate 20, and the light exit portion 251 of the point source 25 passes through the corresponding through hole 221. 096125581 Form No. Α0101 Page 8 of 22 1003141175-0 1344022 [0016]
100年CM月22日核正替换頁 點光源2 5從出光部2 51發出之光線藉由光源容納部201 4 之内侧壁直接進入光學板20内部。由於微凸起2015具有 變化之表面結構，使得光線於光學板20内傳輸至微凸起 2015時，部分原來於未設有微凸起2015之光學板20内全 反射傳播之光線可被微凸起201 5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，避免於相 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20之底面2013設置 有封閉式V型凸起2016，部分原來於未設有封閉式V型凸 起2016之光學板20内全反射傳播之光線可被其調節後從 底面201 3出射，於反射板22之輔助作用下，此部分光線 經多次折射後朝向擴散板23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25，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。如此，點光源2 5 出射至擴散板23之光線不會因爲點光源25至擴散板23之 距離過小而無法較好分散開來。故，點光源25正上方之 區域將避免因點光源25至擴散板23之距離過小而出現亮 點，故，可無需考慮點光源25至擴散板23之距離，從而 ，減小背光模組200之厚度。 [0017] 可以理解，點光源25之發光部251上方還可設置反射片27 。該反射片27可使得點光源25直接正面出射至擴散板23 之光線被反射片27減弱，故可避免於點光源25之正上方 之出現亮點，進一步提高背光模組200之出光均勻性。可 096125581 表單編號A0101 第9頁/共22頁 1003141175-0 -Ϊ344022 10〇年04月22日核正替換頁 [0018] [0019] [0020] [0021] 以理解’還可於點光源25之發光部251上直接設置反射片 或反射層以替代反射片27，同樣可達到較佳之光學效果 可以理解’爲使得該背光模組2〇〇於特定之視角範圍内具 有較高之亮度’於擴散板23之上方還可設置一棱鏡片24 ;爲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-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爲高反 射材料製成或底板211塗覆高反射塗層時。 請參閱圖6，本發明較佳實施例二提供一稜光學板30。該 光學板30與較佳實施例一之光學板20相似，其不同在於 :開設於光學板30之底面30丨3之光源容納部3014爲盲孔 。且盲孔底部可直接塗覆高反射塗層，如此，光學板30 應用於背光模組時，點光源之發光部可直接設置於光源 谷納部3 0 14 ’無需額外設置反射片即可達到較佳之光學 效果。 請參閱圖7 ’本發明較佳實施例三提供一種光學板40。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 .形成於光學板40之出光面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夹角均被圓角化，分別形 成圓角R1和R2。該R1和R2之圓角之取值範圍優選爲大於 0小於或等於1.1毫米。被圓角化之微凸起可使出射光束 之出射角度之變化趨於緩和，使採用光學板40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 096125581 表箪編號A0101 第10頁/共22頁 1003141175-0 1344.022 100年04月22日梭正替换頁 > 一 _ _ 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。 [0022] 請參閱圖8，本發明較佳實施例四提供一種光學板50。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之封閉式V型凸起之頂角被圓角化並形成圓角 R3。該R3之圓角之取值範圍優選爲大於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之背光模組之 φ 出光均勻性提高。可以理解，也可單獨或同時於相鄰封 閉式V型凸起形成之底部夾角進行上述圓角化設計。 [0023] 請參閱圖9，本發明較佳實施例五提供一種光學板80。該 光學板80與較佳實施例一之光學板20相似，其不同在於 :光學板80爲圓形，光學板80之底面8013形成複數圓環 形之封閉式V型凸起8016，複數封閉式V型凸起8016對應 圓環之圓心位於光學板80之中心。可以理解，封閉式V型 凸起可由三條凸邊圍成三角形，也可由五條以上之凸邊 籲 @成多邊形。 [0024] 請參閱圖10，本發明較佳實施例六提供一種組合光學板 90。該組合光學板90包括四光學板單元901。光學板單元 901與較佳實施例一之光學板20具有相同之結構。四光學 板單元901相互緊密排佈，形成一大之矩形組合光學板。 每一光學板單元901包括一出光面9012、一與該出光面 9012相對之底面9013。底面9013開設有一光源容納部 9014，該光源容納部9014爲從底面9013貫穿至出光面 9012之通孔。出光面901 2形成有位於該複數光源容納部 096125581 表單編號A0101 第11頁/共22頁 1003141175-0 1344022 100年04月22日核正替换頁 9014四周之微凸起（圖未示）。底面9013形成複數矩形 狀封閉式V型凸起9016。 [0025] 可以理解，光學板單元上之微凸起之排佈方式包括陣列 排佈、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，其中中心對稱排佈有利於光線於各個 方向上均勻分散。 [0026] 可以理解，本發明光學板之微凸起和封閉式V型凸起可互 換設置於出光面和底面，即於背光模組中，設置有微凸 起之表面可面向擴散板設置，設置有封閉式V型凸起之表 · 面也可面向擴散板設置。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）相對 之出光面（或底面）定義爲第二表面，那麽，第一表面 形成有複數封閉式V型凸起，第二表面形成有微凸起。惟 ，當光源容納部爲盲孔時，盲孔所在之表面只能作爲底 面。 [0027] 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，上述光學板或單個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 數點光源。 [0028] 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】 096125581 表單編號A0101 第12頁/共22頁 1003141175-0 100年04月22日核正替換頁 1344022 [0029] 圖1係一種習知之背光模組之剖視圖。 [0030] 圖2係本發明較佳實施例一之背光模組之剖視圖。 [0031] 圖3係圖2所示背光模組之光學板之立體圖。 [0032] 圖4係圖3所示光學板另一視角之立體圖。 [0033] 圖5係圖3所示光學板沿V-V線之剖視圖。 [0034] 圖6係本發明較佳實施例二之光學板之剖視圖。 [0035] 圖7係本發明較佳實施例三之光學板之剖視圖。The light source emitted from the light exit portion 2 51 is directly entered into the optical plate 20 by the inner side wall of the light source housing portion 201 4 . Since the micro-protrusions 2015 have a varying surface structure, when the light is transmitted to the micro-protrusions 2015 in the optical plate 20, some of the light that is originally totally reflected in the optical plate 20 not provided with the micro-protrusions 2015 can be slightly convex. After adjusting, the light is refracted in a specific direction, for example, the partial light is adjusted to be emitted in the front direction of the direction perpendicular to the vertical diffusion plate 23, thereby increasing the light emitted from the front surface and avoiding darkness between the adjacent point light sources 25. The area improves the light uniformity of the backlight module 200. Further, since the bottom surface 2013 of the optical plate 20 is provided with the closed V-shaped projection 2016, part of the light originally transmitted by the total reflection in the optical plate 20 not provided with the closed V-shaped projection 2016 can be adjusted from the bottom surface. 201 3 is emitted, and under the auxiliary action of the reflecting plate 22, the portion of the light is refracted a plurality of times and then emitted toward the diffusing plate 23. Therefore, the optical utilization of the backlight module 200 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 20, and the point source is converted into a surface source. Thus, the light emitted from the point light source 25 to the diffusing plate 23 is not so dispersed because the distance between the point source 25 and the diffusing plate 23 is too small. Therefore, the area directly above the point light source 25 will avoid the bright point due to the distance between the point source 25 and the diffuser 23 being too small, so that the distance between the point source 25 and the diffuser 23 can be eliminated, thereby reducing the backlight module 200. thickness. [0017] It can be understood that the reflection sheet 27 may be disposed above the light emitting portion 251 of the point light source 25. The reflection sheet 27 can make the light emitted from the front surface of the point source 25 directly to the diffusion plate 23 weakened by the reflection sheet 27, so that bright spots appearing directly above the point source 25 can be avoided, and the uniformity of light emission of the backlight module 200 can be further improved. 096125581 Form No. A0101 Page 9 / Total 22 Page 1003141175-0 - Ϊ 344022 04 04 04 04 04 04 04 04 04 04 04 04 核 核 核 [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ The light-emitting portion 251 is directly provided with a reflective sheet or a reflective layer instead of the reflective sheet 27, and the same optical effect can be achieved. It can be understood that the backlight module 2 has a higher brightness in a specific viewing angle range. A prism sheet 24 may be disposed above the plate 23; in order to uniformly mix the light beam in 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 the bottom plate 211 is coated with a highly reflective coating. Referring to FIG. 6, a preferred embodiment of the present invention provides a prismatic optical plate 30. The optical plate 30 is similar to the optical plate 20 of the first embodiment except that the light source housing portion 3014 formed on the bottom surface 30 of the optical plate 30 is a blind hole. The bottom of the blind hole can be directly coated with a highly reflective coating. Thus, when the optical plate 30 is applied to the backlight module, the light-emitting portion of the point source can be directly disposed in the light source valley portion 3 0 14 ' without the need for an additional reflective sheet. Better optical effect. Referring to FIG. 7, a preferred embodiment 3 of the present invention provides an optical plate 40. The optical plate 40 is similar to the optical plate 2A of the first embodiment except that the angle between the opposite sides of the micro-protrusions formed on the light-emitting surface of the optical plate 40 and the bottom angle formed by the adjacent micro-protrusions are formed. They are all rounded to form rounded corners R1 and R2, respectively. The rounded corners of R1 and R2 preferably have a value range of greater than 0 and less than or equal to 1.1 mm. The rounded micro-protrusions tend to moderate the change in the exit angle of the outgoing beam, which improves the uniformity of light emitted by the backlight module using the optical plate 40. It can be understood that the rounded corners can also be formed separately. 096125581 Form No. A0101 Page 10/Total 22 pages 1003141175-0 1344.022 April 22, 2005 Shuttle replacement page > One _ _ on the opposite side of the micro-protrusion The included angle and the bottom angle formed by the adjacent microprotrusions. Referring to FIG. 8, a preferred embodiment 4 of the present invention provides an optical plate 50. The optical plate 50 is similar to the optical plate 20 of the preferred embodiment 1 except that the apex angle of the closed V-shaped projection of the optical plate 50 is rounded and rounded R3. The value of the rounded corner of R3 is preferably greater than 0 and less than or equal to 1. 1 mm. The rounded V-shaped projections tend to alleviate the change in the exit angle of the outgoing beam, which improves the uniformity of light output of the backlight module using the optical plate 50. It will be appreciated that the fillet design described above can also be made either separately or simultaneously at the bottom corner of the adjacent closed V-shaped projection. Referring to FIG. 9, a preferred embodiment 5 of the present invention provides an optical plate 80. The optical plate 80 is similar to the optical plate 20 of the first embodiment except that the optical plate 80 is circular, and the bottom surface 8013 of the optical plate 80 forms a plurality of closed V-shaped projections 8016, which are closed. The V-shaped projection 8016 is located at the center of the optical plate 80 corresponding to the center of the ring. It can be understood that the closed V-shaped protrusion can be surrounded by three convex edges into a triangle, or five or more convex edges can be called a polygon. Referring to FIG. 10, a preferred embodiment of the present invention provides a combined optical plate 90. The combined optical plate 90 includes a four optical plate unit 901. The optical plate unit 901 has the same structure as the optical plate 20 of the preferred embodiment 1. The four optical plate units 901 are closely arranged to each other to form a large rectangular combined optical plate. Each of the optical plate units 901 includes a light emitting surface 9012 and a bottom surface 9013 opposite to the light emitting surface 9012. The bottom surface 9013 defines a light source receiving portion 9014. The light source receiving portion 9014 is a through hole penetrating from the bottom surface 9013 to the light emitting surface 9012. The light-emitting surface 901 2 is formed in the complex light source housing portion 096125581 Form No. A0101 Page 11 / Total 22 pages 1003141175-0 1344022 On April 22, 100, the micro-protrusions around the 9014 are replaced (not shown). The bottom surface 9013 forms a plurality of rectangular closed V-shaped projections 9016. [0025] It can be understood that the arrangement of the micro-protrusions on the optical plate unit includes array arrangement, array spacing arrangement, random arrangement or symmetric distribution with respect to the center of the optical plate unit, etc., wherein the central symmetric arrangement facilitates The light is evenly dispersed in all directions. [0026] It can be understood that the micro-protrusion and the closed V-shaped protrusion 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 module, the surface provided with the micro-protrusion may be disposed facing the diffusion plate. The surface/face with the closed V-shaped projection can also be placed facing the diffuser. Assuming that the bottom surface (or light-emitting surface) of the optical plate of the present invention is defined as a first surface, and the light-emitting surface (or bottom surface) opposite to the bottom surface (· or the light-emitting surface) is defined as a second surface, then the first surface is formed with a plurality of closed surfaces. The V-shaped projection has a second surface formed with a microprotrusion. However, when the light source receiving portion is a blind hole, the surface on which the blind hole is located can only serve as a bottom surface. [0027] In order to improve the brightness of the backlight module or to form white light by using different colors of light emitting diodes | mixed light, the light source receiving portion of the optical plate or the single optical plate unit may be plural, so that the optical plate or the optical plate unit It can accommodate multiple point sources. [0028] 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. [Simple description of the drawing] 096125581 Form No. A0101 Page 12 of 22 1003141175-0 April 22, 2005 Nuclear replacement page 1344022 [0029] 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 perspective view of another view of the optical plate shown in FIG. 3. 5 is a cross-sectional view of the optical plate shown in FIG. 3 taken along line V-V. 6 is a cross-sectional view of an optical plate according to a second preferred embodiment of the present invention. 7 is a cross-sectional view of an optical plate according to a third preferred embodiment of the present invention.
[0036] 圖8係本發明較佳實施例四之光學板之剖視圖。 [0037] 圖9係本發明較佳實施例五之光學板之立體圖。 [0038] 圖10係本發明較佳實施例六之光學板之立體圖。 【主要元件符號說明】 [0039] (本發明） [0040] [0041] [0042] [0043] [0044] [0045] [0046] [0047]8 is a cross-sectional view of an optical plate according to a fourth preferred embodiment of the present invention. 9 is a perspective view of an optical plate according to a fifth embodiment of the present invention. 10 is a perspective view of an optical plate according to a preferred embodiment of the present invention. [Main Component Symbol Description] [0039] [0046] [0046] [0046] [0047]
光學板：20、30、40、50、80、90 出光面：2012、9012 底面：2013、3013、8013、9013 光源容納部：2014、3014、9014 微凸起：2015 封閉式V型凸起：2016、8016、9016 光學板單元：901 背光模組：200 096125581 表單編號A0101 第13頁/共22頁 1003141175-0 [0047] 1344022 100年04月22日核正替换頁 [0048] 框架：21 [0049] 底板：211 [0050] 側壁：213 [0051] 腔體：215 [0052] 反射板：22 [0053] 通孔：221 [0054] 反射側壁：223 [0055] 擴散板：23 [0056] 稜鏡片：24 [0057] 點光源：2 5 [0058] 出光部：2 51 [0059] 基部：253 [0060] 反射片：27Optical plate: 20, 30, 40, 50, 80, 90 Light-emitting surface: 2012, 9012 Bottom surface: 2013, 3013, 8013, 9013 Light source housing: 2014, 3014, 9014 Micro-bump: 2015 Closed V-shaped bump: 2016, 8016, 9016 Optical board unit: 901 Backlight module: 200 096125581 Form number A0101 Page 13/Total 22 pages 1003141175-0 [0047] 1344022 100 April 2004 Nuclear replacement page [0048] Frame: 21 [ 0049] Base plate: 211 [0050] Side wall: 213 [0051] Cavity: 215 [0052] Reflector: 22 [0053] Through hole: 221 [0054] Reflecting sidewall: 223 [0055] Diffusion plate: 23 [0056] Lens: 24 [0057] Point source: 2 5 [0058] Light exit: 2 51 [0059] Base: 253 [0060] Reflector: 27
096125581 表單編號A0101 第14頁/共22頁 1003141175-0096125581 Form No. A0101 Page 14 of 22 1003141175-0