200839328 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種導光板及其應用，且特別是有關於 具有複數個導光結構的導光板。 【先前技術】 隨著資訊、通信產業不斷地推陳出新，帶動了液晶顯示 器（Liquid Crystal Display ; LCD)市場的蓬勃發展。液晶顯示 器具有高晝質、體積小、重量輕、低驅動電壓、與低消耗功 率等優點，因it匕被廣泛應用於個人數位助理（Personal Digital Assistant ; PDA)、行動電話、攝錄放影機、筆記型電腦、桌 上型顯示器、車用顯示器、及投影電視等消費性通訊或電子 產品。加上積體電路（Integrated Circuit ; 1C)產業與液晶顯示 器製造技術的突飛猛進，這些消費性通訊或電子產品亦朝向 輕、薄、短、小的趨勢發展。尤其是在電腦產品方面，除了 高性能、高速度之桌上型電腦外，攜帶方便的筆記型電腦更 是受到極大的注意與重視。 目前市場上常見之液晶顯示器大部分為背光型液晶顯 示器，這類的液晶顯示器一般主要係由前端之液晶顯示面板 以及後端之背光模組所組成。因此，背光模組為液晶顯示器 中相當關鍵之零組件之一。 背光模組可依照光源入射位置的不同分成側光式入光 (Edge Lighting)與直下式入光（Bottom Lighting)兩種，通常 係運用於各種資訊、通訊、消費產品之中，藉以提供上述液 5 200839328 晶顯示器的一個面光源。 習知的侧光式背光模組係藉由導光板導入自發性光 源，通過不同光學目的之光學膜片加以反射與折射，形成輝 度均勻的面光源後再由光出射口射出。 請參照第1圖，錢示-種習知側光式f光模組的結構 j面圖。此側光式背光模組100至少包含有側光源i 和導 光板120所組成。側光源11〇係用以側向發光至導光板12〇, 並藉由導光板120來導引正向出光，其中導光板12〇具有複 數個V-Cut結構121，其中每一此些v_Cut結構121具有第 一反射面121a (與水平面的夾角約度〜45度）和第二反射 面121b(與水平面的夾角約$ 1〇度），以反射光線來正向出 光。當侧向發光入射角度0的範圍較小時（約<1()度），側向 發光可利用第一反射面121 a來進行一次反射出光。 然而’導光板12〇具有複數個v_cut結構121僅適用於 側向發光角度0的範圍較小的側光源i 1〇，來進行正向出 光，而無法應於其他發光角度範圍。 請參照第2圖，其繪示另一種習知侧光式背光模組的結 構剖面圖。此側光式背光模組2〇〇的導光板220亦具有複數 個V-Cut結構221，其中每一此些\^价結構221亦具有第 一反射面221a (與水平面的夾角約4〇度〜45度）和第二反射 面22lb(與水平面的夾角約I?度〜20度），以反射光線來正向 出光。當側光源210的側向發光角度$，的範圍較大時（約3〇 度）’側向發光可經由第二反射面221b來反射至第一反射面 221a，以進行二次反射出光。 200839328 然而，未反射至第一反射面221a的光線則無法形成正向 出光’而由非所需的角度出光，因而造成不當的出光耗費， 降低背光模組的出光效率。 【發明内容】 因此本發明之一方面係在於提供一種導光板及其應 用，藉以適用於各種發光入線角度，以導引光線正向出光。200839328 IX. Description of the Invention: [Technical Field] The present invention relates to a light guide plate and an application thereof, and more particularly to a light guide plate having a plurality of light guiding structures. [Prior Art] With the continuous innovation of the information and communication industry, the market for liquid crystal displays (LCD) is booming. The liquid crystal display has the advantages of high quality, small size, light weight, low driving voltage, low power consumption, etc., and is widely used in personal digital assistants (PDAs), mobile phones, video recorders. Consumer communications or electronic products such as notebook computers, desktop displays, automotive displays, and projection televisions. Coupled with the rapid advancement of the integrated circuit (1C) industry and liquid crystal display manufacturing technology, these consumer communications or electronic products are also moving toward light, thin, short and small trends. Especially in computer products, in addition to high-performance, high-speed desktop computers, portable notebooks are highly valued and valued. Most of the liquid crystal displays currently on the market are backlit liquid crystal displays. These liquid crystal displays are generally composed of a liquid crystal display panel at the front end and a backlight module at the back end. Therefore, the backlight module is one of the most critical components in the liquid crystal display. The backlight module can be divided into two types: Edge Lighting and Bottom Lighting according to the incident position of the light source. It is usually used in various information, communication and consumer products to provide the above liquid. 5 200839328 A surface light source for crystal displays. Conventional edge-lit backlight modules are introduced into a spontaneous light source by a light guide plate, and are reflected and refracted by optical films of different optical purposes to form a uniform surface light source and then emitted from the light exit opening. Please refer to Fig. 1, which shows the structure of a conventional side-light f-light module. The edge-lit backlight module 100 includes at least a side light source i and a light guide plate 120. The side light source 11 is configured to laterally emit light to the light guide plate 12A, and guide the positive light output by the light guide plate 120. The light guide plate 12A has a plurality of V-Cut structures 121, wherein each of the v_Cut structures 121 has a first reflecting surface 121a (about 45 degrees from the horizontal plane) and a second reflecting surface 121b (about an angle of about 1 degree with the horizontal plane) to reflect light to emit light in the forward direction. When the range of the lateral illuminating incident angle 0 is small (about < 1 () degrees), the lateral illuminating light can be reflected once by the first reflecting surface 121 a. However, the light guide plate 12 has a plurality of v_cut structures 121 which are only suitable for the side light source i 1 较小 having a small range of the lateral light emission angle 0 for forward light emission, and cannot be applied to other light emission angle ranges. Referring to Figure 2, there is shown a cross-sectional view of another conventional edge-lit backlight module. The light guide plate 220 of the edge-lit backlight module 2 亦 also has a plurality of V-Cut structures 221, wherein each of the valence structures 221 also has a first reflective surface 221a (about 4 degrees from the horizontal plane) ~45 degrees) and the second reflecting surface 22lb (about 1 degree to 20 degrees from the horizontal plane), to reflect light to the positive direction. When the range of the lateral light-emitting angle $ of the side light source 210 is large (about 3 degrees), the lateral light emission can be reflected to the first reflective surface 221a via the second reflective surface 221b to perform secondary reflection of light. 200839328 However, the light that is not reflected to the first reflecting surface 221a cannot form a positive light exiting, and the light is emitted from an undesired angle, thereby causing improper light-emitting cost and reducing the light-emitting efficiency of the backlight module. SUMMARY OF THE INVENTION It is therefore an aspect of the present invention to provide a light guide plate and an application thereof, which are suitable for use in various illumination line angles to direct light from the forward direction.
本發明之又一方面係在於提供一種導光板及其應用，藉 以減少光線在導光板内的反射損耗，因而可提升正面出光 度。 、本發明之又一方面係在於提供一種導光板及其應用，藉 以均勻導光板的整體出光。 根據本發明之實施例’本發明之f光模組至少包含有光 源和導光板，光源係用以側向發光，導光板係用以導引光源 的發光來正向出光，其中導光板至少包含有出光面、 =複數”光結構面⑽彡成料純較面 =灿對於出絲，此㈣光結構係形成於歧射面上， :中母-此些導光結構具有相對的第—反射 面，而第-反射面具有第一斜面和* 彳弟-反射 水孚而从榮.^ ^ 弟一斜面，且第一斜面與 又：：:：係小於第二斜面與水平面的第二夾角。’、 又，根據本發明之實施例，上述每 相對的第-反射面和第二反射面4先結構具有 面和第二曲面，且第一曲面盘弟一反射面具有第-曲 曲面與水平面的第二夾角。 的弟—夹角係小於第二 7 200839328 因此’本發明之導光板及其應用可適用於各種發光入線 角度範圍，且可提高光線的正向出光效果，並可提升整體出 光的均勻性。 【實施方式】 請參照第3圖，其繪示依照本發明之第一實施例之背光 板組與液晶顯示模組的剖面示意圖。當本實施例之導光板應 用於一背光模組300時，背光模組300可設置於一液晶顯示 板組L的下方，用以作為液晶顯示器（Liquid Crystal Display; LCD)的側光式背光模組。背光模組300包含有殼體 31〇、光源320、導光板33〇、反射板34〇及光學膜片組35〇。 设體310係用以裝設光源32〇、導光板33〇、反射板34〇及 光學膜片組350。光源320係設置於殼體310之一侧，用以 側向發光至導光板330，並由導光板330來導引發光來正向 出光。反射板設置於導光板33〇的下方，用以反射發光。光 學膜片組350設置於導光板33〇的上方，以進行不同目的之 光學改善動作。 如第3圖所示，本實施例之殼體31()具有光出射口 311 和腔至312。光出射口 3丨丨係用以出光，在本實施例中，殼 體310可形成密閉結構之燈罩，用以避免光線從光出射口 311 以外的部分浪漏出去，其中殼體310係由不透光材質所製 成’例如·塑化材料、金屬材料或上述材料之組合。腔室312 係形成於導光板330的一側，用以容置光源32〇，腔室312 的内側側壁312a可塗佈有光反射材質，例如金、銀、鋁或上 200839328 述材質之組合，用以使一部分未射入導光板330的入射光可 再反射至導光板330之中。其中，本實施例之光源320例如 為·冷陰極燈管（Cold Cathode Fluorescent Lamp ; CCFL)熱 陰極燈管（Hot Cathode Fluorescent Lamp ; HCFL)或發光二極 體（Light Emitting Diode ; LED)。Another aspect of the present invention is to provide a light guide plate and an application thereof, which can reduce the reflection loss of light in the light guide plate, thereby improving the front light output. Another aspect of the present invention is to provide a light guide plate and an application thereof for uniformly emitting light of the entire light guide plate. According to an embodiment of the present invention, the optical module of the present invention includes at least a light source and a light guide plate, wherein the light source is used for lateral illumination, and the light guide plate is configured to guide the light source to emit light in a positive direction, wherein the light guide plate includes at least There is a light surface, = complex number of light structure surface (10) 彡 pure material surface = 灿 for the wire, this (four) light structure is formed on the surface of the face, : the mother - these light guide structures have a relative first reflection Face, and the first-reflecting surface has a first slope and a 彳----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- In addition, according to an embodiment of the present invention, each of the opposite first and second reflecting surfaces 4 has a surface and a second curved surface, and the first curved surface has a first curved surface and a curved surface. The second angle of the horizontal plane. The younger-angle is smaller than the second 7 200839328 Therefore, the light guide plate of the present invention and the application thereof can be applied to various illumination line angle ranges, and can improve the positive light output effect of the light, and can improve the overall Uniformity of light output. Please refer to FIG. 3, which is a cross-sectional view of a backlight panel and a liquid crystal display module according to a first embodiment of the present invention. When the light guide plate of the embodiment is applied to a backlight module 300, the backlight module is used. 300 can be disposed under a liquid crystal display panel group L for use as an edge-lit backlight module of a liquid crystal display (LCD). The backlight module 300 includes a housing 31, a light source 320, and a light guide plate 33. The substrate 310 is provided with a light source 32A, a light guide plate 33, a reflector 34, and an optical film set 350. The light source 320 is disposed on the housing 310. One side is used for laterally emitting light to the light guide plate 330, and is guided by the light guide plate 330 to emit light in the forward direction. The reflective plate is disposed below the light guide plate 33〇 for reflecting light. The optical film set 350 is disposed. The optical improvement operation for different purposes is performed above the light guide plate 33A. As shown in Fig. 3, the housing 31() of the present embodiment has a light exit opening 311 and a cavity to 312. The light exit opening 3 For light extraction, in the present embodiment, the housing 310 can form a seal The lampshade is configured to prevent light from leaking out of a portion other than the light exit opening 311, wherein the casing 310 is made of an opaque material such as a plasticized material, a metal material or a combination of the above materials. The 312 is formed on one side of the light guide plate 330 for accommodating the light source 32A. The inner side wall 312a of the chamber 312 can be coated with a light reflecting material such as gold, silver, aluminum or a combination of the materials of 200839328 for The incident light that is not incident on the light guide plate 330 can be reflected into the light guide plate 330. The light source 320 of the embodiment is, for example, a Cold Cathode Fluorescent Lamp (CCFL) hot cathode lamp (Hot). Cathode Fluorescent Lamp ; HCFL) or Light Emitting Diode (LED).
明參,¾弟4圖和弟5圖’其I會示依照本發明之第一實施 例之導光板的剖面示意圖。本實施例之導光板330係設置於 光源320的一側，以導引出光，導光板33〇例如係利用射出 成型的方式來製成平板形結構，其材質例如為丙烯。導光板 330包含有出光面331、光反射面332及複數個導光結構 3 3 3。出光面3 31係位於導光板3 3 0的正面，且對應於殼體 31〇的光出射口 311，以使光線發出。光反射面332係位於導 光板330的底面，且相對於出光面331。此些導光結構333 係利用射出成型或微切削成型的方式，來形成於光反射面 332上，藉以反射導引由光源32〇所發出的光可經由出光面 331來^成正向出光（意即出光方向可實質垂直於出光面 331)。每一此些導光結構333例如係呈v_at結構，豆呈有 相對的第-反射面333a和第二反射面娜，而第4射面 333a具有第一斜面333a，和第二斜面33^，，，且第一斜面 ⑽，與水平面的第—夾角^係小於第二斜© 333a”與水平 面的第二夾角θ2。其中，第二反射面伽與水平面的夾角 Θ 3約為38度〜48度，第一斜面333 ,鱼 〆办 與水十面的第一夾角 1係κ質小於等於1〇度（幺1〇度）， 而^ 一 . 又（一u度）而弟二斜面333a，，與水平 的第一夾角I約為17度〜20度。 200839328 如第4圖和第5圖所示，本實施例之反射板34〇較佳可 對應於光反射面332的形狀’以密合地設置於導光板330的 下方，反射板340，用以使入射至光反射面332的光線形成 全反射。值得注意的是，導光板330的光反射面332亦可塗 佈具有高反射率的材料’例如金屬材料’以反射入射光線’ 藉以進一步取代設置反射板340。 本實施例之光學膜片組350例如為：擴散片、稜鏡片、 增亮膜（Brightness Enhancement Film ; BEF)、反射式增焭膜 (Dual Brightness Enhancement Film ; DBEF)、非多層膜式反 射偏光片（Diffused Reflective Polarizer Film ; DRPF)或上述 之任意組合，其設置於導光板330的上方，用以使由導光板 330的出光可再進行不同目的之光學改善動作。 請參照第6圖和第7圖，第6圖係繪示依照本發明之第 一實施例之背光模組的立體示意圖，第7圖係繪示依照本發 明之第一實施例之局部背光模組的俯視示意圖。值得注意的 是，當光學膜片組350例如為長條狀稜鏡片時，由於導光板 330的導光結構333可進一步提升平行於導光結構333之方 向上的聚光效果，因此，光學膜片組350可為單一長條狀稜 鏡片，且其稜鏡結構係實質垂直於導光板330的導光結構 333，即可大幅提升聚光效果，而無需設置兩個呈垂直交錯 排列的長條狀稜鏡片來加強聚光效果，因而可節省長條狀稜 鏡片的設置。另外，當長條狀稜鏡片的稜鏡結構係垂直於導 光板330的導光結構333時，長條狀稜鏡片可充許略往兩側 偏移±45度，而不致影響聚光效果。 200839328 ^當本實施例之背光模組之光源320的發光入線角度0in 範圍較小（例如小於10度），且導光板330的出光方向與又出光Π 面331之法線方向的夾角係預設為正負5度（±5度）以内時（意 即預設為正向出光）。此時，錢32〇的光線⑹可利用第二 反射面333b來進行一次反射出光。 • f光源320的發光入線角度0in範圍較大（例如約％ 度V且導光板330的出光方向與出光面331之法線方向的爽 _ 角係預設為正負5度（±5度）以内時。此時，光源32〇的發光 可利用第一反射面333a來進行二次反射出光或形成全反射 繼續行進。當光線L係入射至第一反射面333a的第一斜面 333a’時，光線L2可藉由第一斜面333a，來形成全反射，而繼 續行進至導光板330的後端來正向出光，因而可均勻導光板 330的整體發光。另外，光線b在經第一斜面Μ%，反射後 的行進路徑中可相對減少全反射的次數，因而可減少光強度 的損耗。例如當導光板330的長度為195mm，厚度為21mm， 鲁且發光入線角度0&為38度時，由經光學模擬可知，其行進 路徑中的全反射的次數較習知相同條件的導光板少3〇% 。 菖光線L3係入射至弟一反射面3 3 3 a的第二斜面3 3 3 a” 時，光線La可由第二斜面333a”來反射至第二反射面333b， 以形成二次反射的正向出光。 值得注意的是，由於當光線愈遠離光源32〇時，光強度 則愈弱，因此在本實施例中，每二此些導光結構333的間隔 距離山和心係隨著導光結構333與光源320之距離的增加 而縮小（即山>心），藉以避免導光板330在遠離光源32〇處的 200839328 出光強度不足，使整體導光板330的出光強度更為均勻。 因此，本實施例之背光模組300及其導光板33〇可適用 於各種發光入線角度Θ in範圍，以導引光線正向出光（例如出 光方向與出光面331之法線方向的夾角係預設為正負5度以 内），增加正向出光效率，並可減少光線在導光板33〇内的反 射損耗，提升導光板330的出光效率和均勻性，進而可改善 習知導光板出光不均勻的情形。 明參妝第8圖，其繪示依照本發明之第二實施例之導光 板的剖面示意圖。以下僅就本實施例與第一實施例之相異處 進行說明，關於相似處在此不再贅述。相較於第一實施例， 第二實施例之導光板430至少包含有出光面431、光反射面 432和複數個導光結構433，每一此些導光結構具有相 對的第一反射面433a和第二反射面433 b，而第一反射面433a 具有第一曲面433a，和第二斜面433a，，，且第一曲面433a，與 水平面的第一夾角Θ 4係小於第二曲面433a，，與水平面的第二 夾角Θ5。其中，第二反射面433b與水平面的夾角約為 38度〜48度’第一曲面433a’的切線方向與水平面的夾角變 化係實質介於〇度至10度之間，而第二曲面433a，，的切線方 向$水平面的夾角變化係實質介於17度至2〇度之間。值得 注意的是，此時，第一曲面433a，的曲度（曲率半徑）可以相同 或不同於第二曲面433a”的曲度（曲率半徑)。 。發光入線角度0 h範圍較小（例如小於1 q度），且導光 板430的出光方向與出光面431之法線方向的夾角係預設為 正負5度（士5度）以内時，光線㈤可利用第二反射面433b來 12 200839328 進行一次反射出光。 當發光入線角度<9 ^範圍較大（例如約30度），且導光板 430的出光方向與出光面431之法線方向的失角係預設為正 負5度（±5度）以内時，入射至第一曲面433a，的光線L5可形 成全反射，而繼續行進至導光板43〇的後端來出光。入射至 第二曲面433a”的光線L6可第二曲面433a”來反射至第二反 射面433b，以形成二次反射的正向出光。 因此，第二實施例之導光板430可適用於各種發光入線 角度θίη範圍，以導引光線正向出光，並可減少光線在導光 板430内的反射損耗，增加出光的利用率和出光效率。另外， 可改善習知導光板出光集中於一侧的情形，以均勻化整體導 光板的出光。 請參照第9圖，其繪示依照本發明之第三實施例之導光 板的剖面示意圖。以下僅就本實施例與第一實施例之相異處 進行說明，關於相似處在此不再贅述。相較於第一實施例， 第三實施例之導光板530為楔形板結構，其中在接近光源32〇 處之導光板530的厚度較厚，而在遠離光源32〇處之導光板 530的厚度較薄。因此，本實施例之導光板53〇可進一步提 升導光板530在遠離光源320處的出光強度，因而可均勻整 體導光板530的出光強度，避免習知導光板出光不均勻的情 形。 請參照第10圖，其繪示依照本發明之第四實施例之導 光板的剖面示意圖。以下僅就本實施例與第一實施例之相異 處進行說明，關於相似處在此不再贅述。相較於第一實施 13 200839328 例，第四實施例之導光板63()的出光面63i設有複數個突出 、=構631a’藉以使由光反射面632之導光結構所導引的 光線可進-步修正方向’以增加聚光效果，提高正面輝度， 並可取代稜鏡片的設置，以減少構件成本。其中此些突出結 構631a例如為.稜形（其頂角角度例如為⑽度〜I%度）或半 ° 另外田此些犬出結構631 a例如複數個為長條狀稜形 :構時此些長條狀稜形結構較佳係垂直於導光板33()的導 光結構333，即可大幅提升聚光效果。 由上述本發明的實施例可知，本發明之導光板及其應用 :適用於各種發光入線角度範圍，且可提高光線的正向出光 效果。另外，本發明之導光板可提升整體出光均勻性，避免 出光輝度集中於導光板之一側的情形。 雖然本發明已以實施例揭露如上，然其並非用以限定本 發明/任何熟習此技藝者，在不脫離本發明之精神和範圍 内S可作各種之更動與潤飾，因此本發明之保護範圍當視 後附之申請專利範圍所界定者為準。 【圖式簡單說明】 為讓本發明之上述和其他目的、特徵、優點與實施例能 更明顯易僅，所附圖式之詳細說明如下： 第1圖係繪示一種習知側光式背光模組的結構剖面圖。 第2圖係繪示另一種習知側光式背光模組的結構剖面 圖。 第3圖係繪示依照本發明之第一實施例之背光模組與液 14 200839328 晶顯示模組的剖面示意圖。 之第一實施例之導光板的剖面 第4圖係繪示依照本發明 示意圖。 示意=圖係繪示依照本發明之第—實施例之導光板的剖面The light guide plate of the first embodiment of the present invention is shown in Fig. 1, which shows a cross-sectional view of the light guide plate according to the first embodiment of the present invention. The light guide plate 330 of the present embodiment is disposed on one side of the light source 320 to guide the light, and the light guide plate 33 is formed into a flat plate structure by, for example, injection molding, and the material thereof is, for example, propylene. The light guide plate 330 includes a light-emitting surface 331, a light-reflecting surface 332, and a plurality of light-guiding structures 333. The light-emitting surface 31 is located on the front surface of the light guide plate 330, and corresponds to the light exit opening 311 of the casing 31〇 to emit light. The light reflecting surface 332 is located on the bottom surface of the light guide plate 330 and is opposite to the light emitting surface 331. The light guiding structures 333 are formed on the light reflecting surface 332 by means of injection molding or micro-cutting, so that the light emitted by the light source 32 can be reflected by the light emitting surface 331 to be positively emitted. That is, the light exiting direction may be substantially perpendicular to the light exiting surface 331). Each of the light guiding structures 333 has a v_at structure, for example, the beans have opposite first reflecting surfaces 333a and second reflecting surfaces, and the fourth emitting surface 333a has a first inclined surface 333a and a second inclined surface 33^. And the first inclined surface (10), the first angle with the horizontal plane is smaller than the second angle θ2 of the second oblique © 333a" and the horizontal plane, wherein the angle Θ 3 of the second reflecting surface gamma and the horizontal plane is about 38 degrees 〜 48 Degree, the first slope 333, the first angle of the fish and the water is ten, the κ mass is less than or equal to 1 degree (幺1〇), and ^一. (一u degrees) and the second slope 333a, The first angle I with the horizontal is about 17 degrees to 20 degrees. 200839328 As shown in FIGS. 4 and 5, the reflecting plate 34 of the present embodiment preferably corresponds to the shape of the light reflecting surface 332. The light reflecting plate 340 is disposed under the light guide plate 330 to form a total reflection of the light incident on the light reflecting surface 332. It is noted that the light reflecting surface 332 of the light guiding plate 330 can also be coated with high reflectivity. The material 'for example, a metal material' to reflect incident light' is further substituted for the reflector 340. For example, the optical film set 350 is, for example, a diffusion sheet, a ruthenium sheet, a brightness enhancement film (BEF), a reflective brightness enhancement film (Dual Brightness Enhancement Film; DBEF), and a non-multilayer film reflection polarizer (Diffused). Reflective Polarizer Film; DRPF) or any combination of the above, disposed above the light guide plate 330 for optically improving the light emitted by the light guide plate 330 for different purposes. Referring to Figures 6 and 7, 6 is a schematic perspective view of a backlight module according to a first embodiment of the present invention, and FIG. 7 is a schematic top view of a partial backlight module according to a first embodiment of the present invention. When the optical film set 350 is, for example, a long strip, since the light guiding structure 333 of the light guiding plate 330 can further enhance the light collecting effect in the direction parallel to the light guiding structure 333, the optical film set 350 can be A single strip-shaped cymbal, and the 稜鏡 structure is substantially perpendicular to the light guiding structure 333 of the light guide plate 330, thereby greatly enhancing the concentrating effect without setting two vertical staggered The long strips are used to enhance the concentrating effect, thereby saving the arrangement of the long strips. In addition, when the ridge structure of the strips is perpendicular to the light guiding structure 333 of the light guide 330, the strips are elongated. The cymbal sheet can be offset slightly to the sides by ±45 degrees without affecting the concentrating effect. 200839328 ^When the light source 320 of the backlight module of the embodiment has a small light-input angle range of 0in (for example, less than 10 degrees), Moreover, the angle between the light-emitting direction of the light guide plate 330 and the normal direction of the light-emitting surface 331 is preset to be within plus or minus 5 degrees (±5 degrees) (ie, the light is preset to be forward). At this time, the light (6) of the money 32 可 can be reflected by the second reflecting surface 333b. • The range of the illuminating line angle of the f light source 320 is large (for example, about 5% of the V and the light illuminating direction of the light guiding plate 330 and the normal direction of the light emitting surface 331 are preset to be within plus or minus 5 degrees (±5 degrees). At this time, the light of the light source 32A can be used to perform secondary reflection of light or form total reflection by the first reflecting surface 333a. When the light L is incident on the first inclined surface 333a' of the first reflecting surface 333a, the light is incident. L2 can form total reflection by the first inclined surface 333a, and continue to travel to the rear end of the light guide plate 330 to emit light in the forward direction, thereby uniformly emitting the overall light of the light guide plate 330. In addition, the light b is traversed by the first slope Μ% In the traveling path after reflection, the number of total reflections can be relatively reduced, thereby reducing the loss of light intensity. For example, when the length of the light guide plate 330 is 195 mm, the thickness is 21 mm, and the light entrance angle is 0 degrees, the angle is 0 degrees, According to optical simulation, the total number of reflections in the path of travel is 3% less than that of the light guide plate of the same condition. The ray L3 is incident on the second slope 3 3 3 a of the reflection surface 3 3 3 a. When the light La can be etched by the second slope 333 a" is reflected to the second reflecting surface 333b to form a secondary reflected forward light. It is worth noting that since the light intensity is weaker as the light is farther away from the light source 32, in this embodiment, each The spacing of the light guiding structures 333 is reduced by the distance between the light guiding structure 333 and the light source 320 (ie, the mountain), so as to avoid the light guide plate 330 from being far away from the light source 32. The light intensity is insufficient to make the light intensity of the entire light guide plate 330 more uniform. Therefore, the backlight module 300 and the light guide plate 33 of the embodiment can be applied to various light-input angles Θ in range to guide the light to be forwardly emitted. (For example, the angle between the light-emitting direction and the normal direction of the light-emitting surface 331 is preset to be within plus or minus 5 degrees), the forward light-emitting efficiency is increased, and the reflection loss of the light in the light guide plate 33〇 is reduced, and the light-emitting of the light guide plate 330 is improved. Efficiency and uniformity, which can improve the light unevenness of the conventional light guide plate. Fig. 8 is a cross-sectional view showing the light guide plate according to the second embodiment of the present invention. The difference between the example and the first embodiment is described, and the details are not described herein again. Compared with the first embodiment, the light guide plate 430 of the second embodiment includes at least the light-emitting surface 431, the light-reflecting surface 432, and a plurality of light guiding structures 433, each of the light guiding structures having a first reflective surface 433a and a second reflective surface 433b, and the first reflective surface 433a has a first curved surface 433a, and a second inclined surface 433a, The first curved surface 433a, the first angle Θ 4 with the horizontal plane is smaller than the second curved surface 433a, and the second angle Θ5 with the horizontal plane. The angle between the second reflective surface 433b and the horizontal plane is about 38 degrees to 48 degrees. The angle between the tangential direction of a curved surface 433a' and the horizontal plane is substantially between 10 degrees and 10 degrees, and the variation of the angle between the tangential direction and the horizontal plane of the second curved surface 433a, 433a is substantially between 17 degrees and 2 degrees. between. It should be noted that, at this time, the curvature (curvature radius) of the first curved surface 433a may be the same or different from the curvature (curvature radius) of the second curved surface 433a". The range of the illumination entry angle 0 h is small (for example, smaller than 1 q degree), and the angle between the light-emitting direction of the light guide plate 430 and the normal direction of the light-emitting surface 431 is preset to be within plus or minus 5 degrees (± 5 degrees), the light (5) can be performed by using the second reflective surface 433b to 12 200839328 When the illuminating line angle <9^ is large (for example, about 30 degrees), the angle of deviation between the light-emitting direction of the light guide plate 430 and the normal direction of the light-emitting surface 431 is preset to be plus or minus 5 degrees (±5). When inside, the light L5 incident on the first curved surface 433a may form total reflection, and continue to travel to the rear end of the light guide plate 43 to emit light. The light L6 incident to the second curved surface 433a" may be the second curved surface 433a" The light is reflected to the second reflective surface 433b to form a secondary reflected forward light. Therefore, the light guide plate 430 of the second embodiment can be applied to various illumination line angles θίη range to guide the light to emit light in the forward direction and can be reduced. Light is on the light guide plate 430 The reflection loss increases the light utilization efficiency and the light extraction efficiency. In addition, the light emission from the conventional light guide plate is concentrated on one side to uniformize the light output of the entire light guide plate. Referring to FIG. 9, it is shown in accordance with the present invention. The cross-sectional view of the light guide plate of the third embodiment is described below. Only the differences between the present embodiment and the first embodiment will be described, and the similarities are not described herein again. Compared with the first embodiment, the third embodiment The light guide plate 530 is a wedge plate structure in which the thickness of the light guide plate 530 near the light source 32 is thick, and the thickness of the light guide plate 530 away from the light source 32 is thin. Therefore, the light guide plate of the embodiment 53〇 can further improve the light intensity of the light guide plate 530 away from the light source 320, so that the light intensity of the whole light guide plate 530 can be uniform, and the uneven light emission of the light guide plate can be avoided. Referring to FIG. 10, A cross-sectional view of a light guide plate according to a fourth embodiment of the present invention. Only the differences between the present embodiment and the first embodiment will be described below, and the similarities will not be described herein. Embodiment 13 200839328, the light-emitting surface 63i of the light guide plate 63 () of the fourth embodiment is provided with a plurality of protrusions, 631a', so that the light guided by the light-guiding structure of the light-reflecting surface 632 can be corrected step by step. The direction 'to increase the concentrating effect, to improve the frontal brightness, and to replace the setting of the cymbal to reduce the component cost. The protruding structures 631a are, for example, prismatic (the apex angle is, for example, (10) degrees to 1%) Or a half-degree of the dog-like structure 631 a, for example, a plurality of elongated prisms: when the structure is such that the elongated prism-shaped structure is preferably perpendicular to the light guiding structure 333 of the light guide plate 33) The concentrating effect is greatly improved. According to the embodiment of the present invention, the light guide plate of the present invention and the application thereof are applicable to various illuminating line angle ranges, and can improve the positive light output effect of light. In addition, the light guide plate of the present invention can improve the overall light uniformity and avoid the situation where the light intensity is concentrated on one side of the light guide plate. Although the present invention has been disclosed in the above embodiments, it is not intended to limit the scope of the present invention, and various modifications and refinements may be made without departing from the spirit and scope of the invention. This is subject to the definition of the scope of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, advantages and embodiments of the present invention will become more apparent and obvious. The detailed description of the drawings is as follows: Figure 1 shows a conventional side-lit backlight A structural section view of the module. Figure 2 is a cross-sectional view showing the structure of another conventional edge-lit backlight module. 3 is a cross-sectional view showing a backlight module and a liquid 14 200839328 crystal display module according to a first embodiment of the present invention. Cross section of the light guide plate of the first embodiment Fig. 4 is a schematic view showing the present invention. Illustrated=FIG. is a cross section of a light guide plate according to a first embodiment of the present invention.
第6圖係 體不意圖 、曰 示依照本發明之第一實施例之背光 模組的立 第7圖係繪示依照本發明 的俯視示意圖。 (局口p月先 第8圖係繪示依照本發之杏 示意圖。 之弟一貝靶例之導光板的剖面 示意圖 模組 =9圖係㈣依照本發明之第三實施狀導光板的剖面 =1G圖錄示依照本發明之第四實施例之導光板的剖 田不思圖。 【主要元件符號說明】 0、0 ’ ' 0 in :發光入射角度 Θ 1、0 5 :第一夾角 Θ 3、0 6 :夾角 di、da :間隔距離 0 2、0 6 ··第二夾角 L :液晶顯示模組 L，、L2、L3、L4、l5 wo :背光模組 120 ·導光板 L6 :光線 110 :側光源 121 : V-Cut 結構 15 200839328 121a :第一反射面 200 :背光模組 220 :導光板 221a :第一反射面 300 :背光模組 311 :光出射口 312a :内側側壁 330 :導光板 332 :光反射面 333a :第一反射面 333a” ··第二斜面 340 :反射板 430 :導光板 432 :光反射面 433a ··第一反射面 433a” ··第二斜面 530 :導光板 631 :出光面 121b :第二反射面 210 :側光源 221 ·· V-Cut 結構 221b :第二反射面 310 :殼體 312 :腔室 320 :光源 331 :出光面 333 ·•導光結構 333a’ ··第一斜面 333b :第二反射面 350 :光學膜片組 431 :出光面 433 :導光結構 433a，：第一斜面 433b ··第二反射面 630 :導光板 631a :突出結構 16Figure 6 is a schematic plan view of a backlight module in accordance with a first embodiment of the present invention. (After the port, the first figure shows the outline of the light guide plate according to the present invention. The cross-sectional view of the light guide plate of the first one of the target case module = 9 (4) The profile of the light guide plate according to the third embodiment of the present invention The =1G map shows the cross-sectional view of the light guide plate according to the fourth embodiment of the present invention. [Main component symbol description] 0, 0 ' ' 0 in : illuminating incident angle Θ 1, 0 5 : first angle Θ 3, 0 6 : angle di, da: separation distance 0 2, 0 6 · · second angle L: liquid crystal display module L, L2, L3, L4, l5 wo: backlight module 120 · light guide L6: light 110: side light source 121: V-Cut structure 15 200839328 121a: first reflective surface 200: backlight module 220: light guide plate 221a: first reflective surface 300: backlight module 311: light exit port 312a: inner side wall 330: guide Light plate 332: light reflecting surface 333a: first reflecting surface 333a" · second inclined surface 340: reflecting plate 430: light guiding plate 432: light reflecting surface 433a · · first reflecting surface 433a" · second inclined surface 530: light guide plate 631: light-emitting surface 121b: second reflection surface 210: side light source 221 ·· V-Cut structure 221b: second reflection surface 310: housing 312: The chamber 320: the light source 331: the light-emitting surface 333 · the light-guiding structure 333a' · the first slope 333b: the second reflection surface 350: the optical film group 431: the light-emitting surface 433: the light-guiding structure 433a, the first slope 433b · Second reflective surface 630: Light guide plate 631a: protruding structure 16