201122658 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】 [〇〇〇2] 請參見圖1，所示為一種習知之直下式背光模組100，其 包括框架11、設置於該框架11内部之複數光源丨2及設置 於光源12上方之擴散板13。 [0003]使用時’由複數光源12產生之光線進入擴散板13後可被 ^ 擴散。然’於經擴散板13擴散後，光線從擴散板13之出 射角度變得較為雜亂，使得其於特定視角範圍内之亮度 不高；並且由於光源12朝其正上方傳輸之光線較多，擴 散板13常難以直接將來自光源12光線擴散均勻，使得從 擴散板13出射之光線容易產生光源殘影 ，即出現光強強 弱不同之區域。 [_从高背域組丨⑼於特定視肖範_之亮度以及避免 光源殘影之產生’徒而提高背光模組100出射光之均勻性 ϋ 通常於擴散板13上方還設置有一光學板1〇與一上擴散 片14如圖2所示，光學板10包括透明基板101及形成於 透月基板101上之稜鏡層1()3。稜鏡層1Q3上具有複數長 條形V形凸起1〇5。光學板1〇之長條騎形凸起可使出 射光線發生-疋程度之聚集，從而提高背光模組⑽於特 &視角範圍内之亮度。上擴散片14可對從光學板ι〇出射 之光線作進一步擴散。 [0005] 098144396 =:光學板中傳輸時 0982075912-0 201122658 會被吸收而造成光線損失；並且於光學板10與上擴散片 14之間有空氣層，其會增加光線於傳輸過程中之介面數 量，增加光線傳輸之介面損失，降低出光亮度。 【發明内容】 [0006] 鑒於上述狀況，有必要提供一種出光亮度較高的背光模 組及其光學板。 [0007] Ο 一種背光模組，其包括框架、光源及光學板。光源位於 該框架内，光學板位於該光源上方。光學板包括第一表 面及與該第一表面相對之第二表面。第一表面上形成有 複數微結構。微結構於第一表面上之輪廓線圍成一橢圓 形，以橢圓形之長軸與短軸分別為X軸及Υ轴建立Χ-Υ-Ζ三 維直角坐標系，則輪廓線上任一點之y座標值及X座標值 滿足如下關係： [0008] ❹ 1 + exp(- l + exp(- ’ [0009] 凸起於x-z面上之投影為一條脊線與x轴圍成之封閉圖形 ，其中該脊線上任意一點之z座標值及X座標值滿足如下 關係： [㈤ 10] 2 — ^xtan(90o-^) 098144396 表單編號A0101 第5頁/共25頁 0982075912-0 201122658 [0011] [0012] 其中^〜^^:^厂^及❷均為常數’其範 圍分別為-13. 549 < y < -9.549， -1 〇 < γ / 0 υ 〈 xc< 1. Ο ，62.754 < A〈 72.754，45.72〈 '< 28〇 2， 8.01 < w2〈 53.03，8.01 < w3< 53.03，45S〈（〈 175s，〇. l < s < 3，該第二表面為平面。201122658 VI. Description of the Invention: [Technical Field] The present invention relates to a backlight module and an optical plate thereof, and more particularly to a backlight module for liquid crystal display and an optical plate thereof. [Previous Technology] [〇〇〇2] Referring to FIG. 1 , a conventional direct type backlight module 100 includes a frame 11 , a plurality of light sources 设置 2 disposed inside the frame 11 , and a light source 12 disposed above the light source 12 . Diffusion plate 13. When used, the light generated by the complex light source 12 enters the diffusion plate 13 and can be diffused. However, after the diffusion through the diffusion plate 13, the angle of light exiting from the diffusion plate 13 becomes more disordered, so that the brightness is not high in a specific viewing angle range; and since the light source 12 transmits more light directly above it, diffusion It is often difficult for the plate 13 to directly diffuse the light from the light source 12 uniformly, so that the light emitted from the diffusing plate 13 is likely to cause residual light source, that is, a region where light intensity is different. [_From the high-back domain group (9) to the brightness of the specific viewing mode and avoiding the generation of the residual image of the light source, the uniformity of the light emitted from the backlight module 100 is improved. ϋ An optical plate 1 is usually disposed above the diffusion plate 13. As shown in FIG. 2, the optical plate 10 includes a transparent substrate 101 and a ruthenium layer 1 (3) formed on the moon-permeable substrate 101. The enamel layer 1Q3 has a plurality of elongated V-shaped projections 1〇5. The long strip-shaped protrusions of the optical plate 1 can cause the occurrence of light rays to be concentrated, thereby improving the brightness of the backlight module (10) in the range of the viewing angle of the backlight. The upper diffusion sheet 14 can further diffuse light emitted from the optical plate. [0005] 098144396 =: When the optical plate is transported, 0982075912-0 201122658 will be absorbed to cause light loss; and there is an air layer between the optical plate 10 and the upper diffusion sheet 14, which will increase the number of interfaces in the transmission process. Increase the interface loss of light transmission and reduce the brightness of light. SUMMARY OF THE INVENTION [0006] In view of the above circumstances, it is necessary to provide a backlight module having a high light-emitting luminance and an optical plate thereof. [0007] A backlight module includes a frame, a light source, and an optical plate. The light source is located within the frame and the optical plate is positioned above the light source. The optical plate includes a first surface and a second surface opposite the first surface. A plurality of microstructures are formed on the first surface. The contour of the microstructure on the first surface encloses an ellipse, and the long axis and the minor axis of the ellipse form a Χ-Υ-Ζ three-dimensional rectangular coordinate system for the X axis and the Υ axis respectively, and any point on the contour line y The coordinate value and the X coordinate value satisfy the following relationship: [0008] ❹ 1 + exp(- l + exp(- ' [0009] The projection of the protrusion on the xz plane is a closed pattern surrounded by a ridge line and an x-axis, wherein The z coordinate value and the X coordinate value of any point on the ridge line satisfy the following relationship: [(5) 10] 2 — ^xtan(90o-^) 098144396 Form No. A0101 Page 5 of 25 0982075912-0 201122658 [0011] [0012 ] ^^^^:^厂^ and ❷ are constants', respectively, whose range is -13. 549 < y < -9.549, -1 〇< γ / 0 υ 〈 xc< 1. Ο , 62.754 < A < 72.754, 45.72 < '< 28〇2, 8.01 < w2< 53.03, 8.01 <w3< 53.03, 45S < ( 175s, 〇. l < s < 3, the second surface is a plane .
一種光學板，其包括第一表面及與該第一表面相對之第 二表面。第一表面上形成有複數微結構。微結構於第一 表面上之輪廓線圍成一橢圓形，以橢圓形之長軸與短軸 分別為X軸及Y軸建立X—γ—Ζ^維直角坐標系，則輪廓線上 任一點之y座標值及X座標值滿足如下關係： [0013] y = Sx 1 + e^>(- (χ· •f) ·χ(ΐ_- 1 + exp( [0014] 該凸起於X-Z面上^敏影為一條脊線與^轴圍成之封閉圖An optical plate comprising a first surface and a second surface opposite the first surface. A plurality of microstructures are formed on the first surface. The outline of the microstructure on the first surface is surrounded by an ellipse, and the long axis and the short axis of the ellipse are respectively defined as an X-γ-Ζ^-dimensional rectangular coordinate system for the X-axis and the Y-axis, respectively, and any point on the contour line The y coordinate value and the X coordinate value satisfy the following relationship: [0013] y = Sx 1 + e^>(- (χ· •f) ·χ(ΐ_- 1 + exp( [0014] The protrusion is on the XZ plane ^敏影 is a closed diagram of a ridge line and ^ axis
形，其中該脊線上任意—點之z座標值及X座標值滿足如 下關係： [0015] z = y X tan(90°a shape in which the z coordinate value and the X coordinate value of the arbitrary-point on the ridge line satisfy the following relationship: [0015] z = y X tan (90°)
其中，51〇、八、\111213及0均為常數，其範 圍分別為一13. 549 < y〇< -9.549， -1.0 < xc< 1.( ，62. 754 < A < 72. 754，45. 72 < w/ 280. 2， 098144396 表單編號A0101 第6頁/共25頁 0982075912-0 [0016] 201122658 8.01 < w< 53. 03 '8. 01 < w< 53.03^452 < ( < L ο 175e，0.1 < S < 3,該第二表面為平面。 [0017] [0018] Ο [0019] [0020] 〇 [0021] 上述光學板可使入射其中之光線發生折射、反射及繞射 ，進而發生特定之擴散，形成一均勻之出光面。第一表 面上之凸起結構還可收斂出射光線之出光角度，增強出 光亮度。 【實施方式】 下面將結合附圖及實施方式對本發明之背光模組及其光 學板作進一步之詳細說明。 請參見圖3，所示為本發明較佳實施方式之光學板20，其 具有第一表面201及與第一表面201相對之第二表面203 。其中，第一表面201上形成有複數陣列排佈之複數微結 構2011。本實施方式中，微結構2011為從第一表面201 上向外延伸之凸起，第二表面203為平面。 光學板20由透明材料製成。該透明材料為聚曱基丙烯酸 曱酯、聚碳酸酯、聚苯乙烯、苯乙烯-曱基丙烯酸曱酯共 聚物中之一種或一種以上之混合物。 請參閱圖4至圖7，微結構2011由底面2012及二側面2013 圍成，二侧面2013相交於微結構2011之頂部形成一條脊 線2014。底面2012大致為橢圓形，其為微結構2011於第 一表面201上之兩條輪廓線2015圍成，底面2012具有一 長轴2016及一短軸2017。以長轴2016為X軸，短軸2017 為Y軸，長轴2016與短軸之交點為原點建立三維直角坐標 系，Z軸之方向指向微結構2011之延伸方向，則微結構 098144396 表單編號A0101 第7頁/共25頁 0982075912-0 201122658 2011自身相對於χ-ζ平面及Y-Z平面均為對稱圖形。於上 述三維直角坐標系内，輪廓線201 5之軌跡可用如下方程 描述： [0022] [0023] [0024] [0025] y〇 + ^4χ χ 1 + β3φ( W3 上述方程式中，y為輪廓線2015上任一點於γ軸上之座標 值，X為該點於X轴上之座標值。其餘為常數，其中，χ及 各常數之優選範圍如下：-]3.540<5^<-9.549，_213.5 < χ < 213.5，-1.〇〈女。< 1. 〇，62.754 < A < 72· 754，45. 72 < w/ 280. 2，8. 01 < w < 53. 03 ’ 8. 01 < w3< 53· 03，0· 1〈 s〈 3。 由於微結構2011關於χ-ζ軸對稱，故脊線卷〇丨4於平面 内延伸，脊線2014於Χ-Ζ平面上之投影即為自身，微結構 2011被任意平行γ-ζ平面之平面所截之截面為三角形（圖 5)，將該三角形之頂角記為0，則對於微結構2〇11脊線 2014上任意一點之ζ軸座標值2與其γ轴座標值7有如下關 係： g z = yx tan(90° —) •x(i- xtan(90°- Θ l + exp(- w3 098144396 表單編號A0101 第8頁/共25頁 0982075912-0 201122658 [0026] [0027] [0028]Ο [0029] [0030] Ο [0031] [0032] 上式即為脊線20 1 4上任意一點之Ζ座標與X座標之關係， 即脊線2014於Χ-Ζ平面投影之曲線軌跡（圖6)。 其中，上式中X及各常數之優選範圍如下：-13. 549 < y〇< -9.549，-213·5 < X < 213.5，-1.0 < X < C 1.0,62.754 < A < 72.754,45.72 < w】< 280.2, 8.01 < w.< 53.03*8.01 < w < 53.03»45Ω < ( < L ο 175s ，0. 1 < S < 3。 微結構2011之頂部至少部分平面化，或者弧形化，以增 強光學板20之整體強度。此時，脊線2014於X-Z平面上 之投影滿足上述脊線2014之轨跡方程。 光學板20上之微結構2011可採用與透明材料形成於第一 表面201，亦可於母模刻設相應之凹槽，藉由注塑一體成 型〇 使用時，光學板20之第二表面203靠近光源作為入光面， 而第一表面201遠離光源作為出光面，光源發出之光從第 二表面203進入後，於微結構2011内發生特定之折射、繞 射與全反射，收斂光線之出光角度，使出光亮度增加。 當然，微結構2011於Y-Z兩端之脊線2014相對於X軸之傾 斜角度亦可不相同，使微結構2011相對於Y-Z平面呈非對 稱形狀。 微結構2011之結構不限於凸起，其亦可為相同形狀、自 第一表面201向光學板20内部延伸之凹槽。此時，微結構 2011於第一表面201上之輪廓線與其為凸起時相同，微結 構2011之脊線2014將位於第一表面201下方，Z軸指向第 098144396 表單編號A0101 第9頁/共25頁 0982075912-0 201122658 二表面203。微結構2011為凹槽時，光學板20之效果與 微結構2011為凸起時效果基本相同。 [0033] 請參見圖8，所示為本發明較佳實施例之背光模組200， 其包括上述光學板20、框架21及光源22，該光源22位於 該框架21内，該光學板20位於該光源22上方。 [0034] 框架21可由具有高反射率之金屬或塑膠製成，或塗附有 高反射率塗層之金屬或塑膠製成。 [0035] 光源22可為複數線光源或複數點光源，本實施方式中為 複數線光源，該複數線光源緊密排佈，優選該複數線光 源為複數冷陰極螢光燈。 [0036] 上述背光模組200中之光學板20之第二表面203面向光源 22作為入光面而第一表面201遠離光源22作為出光面。複 數冷陰極螢光燈緊密排佈，其發出之光線射入光學板20 之後發生特定之折射、散射、反射與繞射等光學作用， 進而可使從光學板20出射之光線發生特定之擴散，從而 形成亮度較均勻之出射面。其中，第一表面201上之微結 構2011結構可收斂光之出射角度，使出射光於特定範圍 内之亮度增加。由此可見，上述背光模組200可提高背光 模組之出光均勻性，增強出光亮度。當然，當光源22為 複數點光源時，將該複數點光源緊密排佈成陣列，可同 樣達到使用複數線光源之效果，優選該複數點光源為複 數發光二極體。 [0037] 為進一步驗證光學板20之效果，於背光模組100及背光模 組200之出光面上各取九測試點於相同之光源下做出光亮 098144396 表單編號A0101 第10頁/共25頁 0982075912- 201122658 度對比測試，測試結果如下表。 [0038]表1對比剛試表（亮度單位：cd/m2) [0039] 2 3 4 〇 〇 [0040] [0041] 098144396 5 6 7 8 測試點序號ι 背光模組100 背光模組200 亮度提高百 出光亮度 出光亮度 分比 1775.〇〇 2027.20 14. 2% 1652.60 1904.20 15. 2% 1592.80 1926.80 20. 9% 1771.20 2054.60 16. 0% 1623,8〇 ---—-: 1919.00 18. 2% 1497.80 2082.00 39. 0% 1624.20 2220.40 36. 7% 1570.〇〇 2009.60 28. 0% 1566.20 2198,20 40. 3% 度都比背光棋組100之出光亮度犬，亮度提高至少14%， 效果明顯。 田光原2之間之間距較大時，可羅發明之背光模組200 "〇與光源22之間增設-擴散板，從而可進-步 將光線擴散均句’提升整體背光模組之出 光均勻性。 综上所述纟發明確已符合發明專利之要件，遂依法提 出專利申請。惟’以上所述者僅為本發明之較佳實施方 式’自不m限制本案之*請專利範圍。舉凡熟悉本 案技藝之人士援依本發明之精神所作之等效修飾或變化 ，皆應涵蓋於以下申請專利範圍内。 表單煸號A0101 第11頁/共25頁 0982075912-0 201122658 【圖式簡單說明】 [0042] 圖1係一種習知之背光模組之剖面示意圖。 [0043] 圖2係圖1所示背光模組之光學板之立體圖。 [0044] 圖3係本發明較佳實施方式光學板之立體示意圖。 [0045] 圖4係圖3所示光學板之凸起之立體示意圖。 [0046] 圖5係圖3所示光學板之凸起於Y-Z平面上之截面圖。 [0047] 圖6係圖3所示光學板之凸起於X-Z平面上之投影圖。 [0048] 圖7係圖3所示光學板之凸起於X-Y平面上之截面圖。 〇 [0049] 圖8係採用圖3所示光學板之背光模組之示意圖。 【主要元件符號說明】 [0050] 背光模組 100、200 [0051] 光學板 10、20 [0052] 基板 101 [0053] 稜鏡層 103 rWherein, 51〇, 八, \111213, and 0 are constants, and the ranges are respectively 13. 549 <y〇< -9.549, -1.0 <xc< 1.( , 62. 754 < A < 72. 754,45. 72 < w/ 280. 2, 098144396 Form No. A0101 Page 6 of 25 0982075912-0 [0016] 201122658 8.01 <w< 53. 03 '8. 01 <w< 53.03 ^452 < ( < L ο 175e, 0.1 < S < 3, the second surface is a plane. [0018] [0020] [0021] The above optical plate can be incident thereon The light is refracted, reflected and diffracted, and then a specific diffusion occurs to form a uniform light-emitting surface. The convex structure on the first surface can also converge the light-emitting angle of the outgoing light to enhance the brightness. [Embodiment] The backlight module and the optical plate of the present invention are further described in detail with reference to the accompanying drawings and embodiments. Referring to FIG. 3, there is shown an optical plate 20 according to a preferred embodiment of the present invention having a first surface 201 and A surface 201 is opposite to the second surface 203. The first surface 201 is formed with a plurality of micro-structures 201 arranged in a plurality of arrays. 1. In the present embodiment, the microstructures 2011 are protrusions extending outward from the first surface 201, and the second surface 203 is planar. The optical plate 20 is made of a transparent material. The transparent material is polydecyl methacrylate. , a mixture of one or more of polycarbonate, polystyrene, styrene-mercapto methacrylate copolymer. Referring to Figures 4 to 7, the microstructure 2011 is surrounded by the bottom surface 2012 and the two sides 2013, The side surface 2013 intersects at the top of the microstructure 2011 to form a ridge line 2014. The bottom surface 2012 is substantially elliptical, which is surrounded by two contour lines 2015 of the microstructure 2011 on the first surface 201, and the bottom surface 2012 has a long axis 2016 and A short axis 2017. The long axis 2016 is the X axis, the short axis 2017 is the Y axis, and the intersection of the long axis 2016 and the short axis establishes a three-dimensional Cartesian coordinate system for the origin, and the direction of the Z axis points to the extension direction of the microstructure 2011. Microstructure 098144396 Form No. A0101 Page 7 / Total 25 Page 0992075912-0 201122658 2011 itself is symmetric with respect to both the χ-ζ plane and the YZ plane. In the above three-dimensional Cartesian coordinate system, the trajectory of the contour line 201 5 can be as follows description [0025] [0025] [0025] y〇+^4χ χ 1 + β3φ (W3 In the above equation, y is the coordinate value of any point on the contour line 2015 on the γ-axis, and X is the point on the X-axis. The coordinate value. The rest are constants, wherein the preferred range of χ and each constant is as follows: -] 3.540 <5^<-9.549, _213.5 < χ < 213.5, -1. < 1. 〇, 62.754 < A < 72· 754, 45. 72 < w/ 280. 2, 8. 01 < w < 53. 03 ' 8. 01 <w3< 53· 03, 0· 1< s< 3. Since the microstructure 2011 is symmetric about the χ-ζ axis, the ridge line coil 4 extends in a plane, the projection of the ridge line 2014 on the Χ-Ζ plane is itself, and the microstructure 2011 is arbitrarily parallel to the plane of the γ-ζ plane. The cross section is a triangle (Fig. 5), and the apex angle of the triangle is 0. The ordinate coordinate value 2 of any point on the ridge line 2014 of the microstructure 2〇11 has the following relationship with the γ axis coordinate value 7: Gz = yx tan(90° —) • x(i- xtan(90°- Θ l + exp(- w3 098144396 Form No. A0101 Page 8 of 25 0982075912-0 201122658 [0026] [0028] [0030] [0032] The above formula is the relationship between the coordinates of the Ζ coordinate and the X coordinate of any point on the ridge 20 1 4, that is, the curved trajectory of the ridge line 2014 on the Χ-Ζ plane projection (Fig. 6) wherein, the preferred range of X and each constant in the above formula is as follows: -13. 549 <y〇< -9.549, -213·5 < X < 213.5, -1.0 < X < C 1.0 , < 72.754, 45.72 < S < 3. At least the top of the microstructure 2011 Planarization, or arcing, to enhance the overall strength of the optical plate 20. At this time, the projection of the ridge line 2014 on the XZ plane satisfies the trajectory equation of the ridge line 2014. The microstructure 2011 on the optical plate 20 can be used with The transparent material is formed on the first surface 201, and the corresponding groove can be engraved in the female mold. When the injection molding is integrally formed, the second surface 203 of the optical plate 20 is adjacent to the light source as the light incident surface, and the first surface 201 Along from the light source as the light exiting surface, after the light emitted by the light source enters from the second surface 203, specific refraction, diffraction and total reflection occur in the microstructure 2011, and the light exiting angle of the light converges to increase the brightness of the light. Of course, the microstructure 2011 The slanting angles of the ridges 2014 at the ends of the YZ may be different from the X-axis, so that the microstructures 2011 have an asymmetrical shape with respect to the YZ plane. The structure of the microstructures 2011 is not limited to the protrusions, but may be the same shape, The first surface 201 extends toward the inside of the optical plate 20. At this time, the outline of the microstructure 2011 on the first surface 201 is the same as when it is convex, and the ridge line 2014 of the microstructure 2011 will be located in the first table. Below 201, Z-axis pointing to the first sheet number A0101 098 144 396 Page 9/25 Total 201 122 658 0982075912-0 second surface 203. When the microstructure 2011 is a groove, the effect of the optical plate 20 is substantially the same as when the microstructure 2011 is convex. [0033] Referring to FIG. 8, a backlight module 200 according to a preferred embodiment of the present invention includes the optical board 20, a frame 21, and a light source 22. The light source 22 is located in the frame 21, and the optical board 20 is located. Above the light source 22. [0034] The frame 21 may be made of metal or plastic having high reflectivity or metal or plastic coated with a high reflectivity coating. The light source 22 may be a plurality of line sources or a plurality of point sources. In this embodiment, the plurality of line sources are arranged closely. Preferably, the plurality of line sources are a plurality of cold cathode fluorescent lamps. [0036] The second surface 203 of the optical plate 20 in the backlight module 200 faces the light source 22 as a light incident surface and the first surface 201 away from the light source 22 as a light exit surface. The plurality of cold cathode fluorescent lamps are arranged closely, and the emitted light is incident on the optical plate 20 to cause specific optical effects such as refraction, scattering, reflection, and diffraction, and the light emitted from the optical plate 20 is specifically diffused. Thereby, an exit surface with a relatively uniform brightness is formed. Wherein, the structure of the microstructure 118 on the first surface 201 can converge the exit angle of the light, so that the brightness of the emitted light in a specific range is increased. It can be seen that the backlight module 200 can improve the light uniformity of the backlight module and enhance the brightness of the light. Of course, when the light source 22 is a plurality of point light sources, the plurality of point light sources are closely arranged in an array, and the effect of using the plurality of line sources can be achieved. Preferably, the plurality of point sources are complex light-emitting diodes. [0037] In order to further verify the effect of the optical plate 20, nine test points are taken on the light-emitting surface of the backlight module 100 and the backlight module 200 to make a light under the same light source. 098144396 Form No. A0101 Page 10 of 25 0982075912-201122658 Degree comparison test, the test results are shown in the following table. [0038] Table 1 comparison test table (luminance unit: cd / m2) [0039] 2 3 4 〇〇 [0040] [0041] 098144396 5 6 7 8 test point number ι backlight module 100 backlight module 200 brightness improvement The brightness of the luminosity brightness is 1775.〇〇2027.20 14. 2% 1652.60 1904.20 15. 2% 1592.80 1926.80 20. 9% 1771.20 2054.60 16. 0% 1623,8〇-----: 1919.00 18. 2% 1497.80 2082.00 39. 0% 1624.20 2220.40 36. 7% 1570.〇〇2009.60 28. 0% 1566.20 2198,20 40. 3% degrees are better than the backlight brightness of the backlit chess set 100, the brightness is improved by at least 14%, the effect is obvious. When there is a large distance between Tianguangyuan 2, the backlight module 200 can be invented and a diffuser plate is added between the light source and the light source 22, so that the light can be diffused and the light of the whole backlight module can be improved. Uniformity. In summary, the invention has indeed met the requirements of the invention patent and has filed a patent application in accordance with the law. However, the above description is only a preferred embodiment of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims. Form nickname A0101 Page 11 of 25 0982075912-0 201122658 [Simple Description of the Drawings] [0042] FIG. 1 is a schematic cross-sectional view of a conventional backlight module. 2 is a perspective view of an optical plate of the backlight module shown in FIG. 1. 3 is a perspective view of an optical plate according to a preferred embodiment of the present invention. 4 is a perspective view showing the protrusion of the optical plate shown in FIG. 3. 5 is a cross-sectional view of the protrusion of the optical plate shown in FIG. 3 on the Y-Z plane. 6 is a projection view of the protrusion of the optical plate shown in FIG. 3 on the X-Z plane. 7 is a cross-sectional view of the protrusion of the optical plate shown in FIG. 3 on the X-Y plane. 8 is a schematic view of a backlight module using the optical plate shown in FIG. 3. [Main component symbol description] [0050] backlight module 100, 200 [0051] optical plate 10, 20 [0052] substrate 101 [0053] 稜鏡 layer 103 r
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[0054] 長條形V形凸起105 [0055] 框架 11、21 [0056] 光源 12、22 [0057] 擴散板13 [0058] 第一表面 2 0 1 [0059] 微結構 2011 0982075912-0 098144396 表單編號A0101 第12頁/共25頁 201122658 [0060] [0061] [0062] [0063] [0064] [0065] Ο 底面2012 脊線2014 輪廓線2015 長軸2016 短軸2017 第二表面203 Ο 098144396[0054] elongated V-shaped projections 105 [0055] Frames 11, 21 [0056] Light source 12, 22 [0057] Diffusion plate 13 [0058] First surface 2 0 1 [0059] Microstructure 2011 0982075912-0 098144396 Form No. A0101 Page 12 / Total 25 Pages 201122658 [0060] [0065] [0065] 底面 Underside 2012 Ridgeline 2014 Outline 2015 Long Axis 2016 Short Axis 2017 Second Surface 203 Ο 098144396
表單編號Α0101 第13頁/共25頁 0982075912-0Form No. Α0101 Page 13 of 25 0982075912-0