1334939 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，因此被廣泛應用於個人數位助理（Pers〇nalDigital 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 不器，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 1334939 晶顯示器的一個面光源。 * 習知的側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，其繪示一種習知側光式背光模組的結構 剖面圖。此側光式背光模組1 〇〇至少包含有侧光源i丨〇和導 光板120所組成。側光源11〇係用以侧向發光至導光板12〇， 並藉由導光板120來導引正向出光，其中導光板丨2〇具有複 數個V-Cut結構121，其中每一此些ν-Cut結構121具有第 一反射面121a (與水平面的夾角約40度〜45度）和第二反射 面121b(與水平面的夾角約$10度），以反射光線來正向出 光。當側向發光入射角度0的範圍較小時（約<1〇度），側向 發光可利用第一反射面121a來進行一次反射出光。 然而’導光板120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丨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。此侧光式背光模組2〇〇的導光板22〇亦具有複數 個V-Cut結構221 ’其中每一此些ν-Cut結構221亦具有第 一反射面221a (與水平面的夾角約40度〜45度）和第二反射 面22 lb(與水平面的夾角約17度〜2〇度），以反射光線來正向 出光。當側光源210的側向發光角度0 ’的範圍較大時（約3〇 度），侧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。 (S ) 6 1334939 然而，未反射至第一反射面22q的羌線則無法形成正向 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】1334939 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, and low power consumption, so it 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. In addition, the integrated circuit (1C) industry and liquid crystal display manufacturing technology are advancing rapidly. 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 1334939 A surface light source for crystal displays. * The conventional edge-lit backlight module is introduced into the spontaneous light source by a light guide plate, and is reflected and refracted by an optical film of different optical purposes to form a surface light source with uniform brightness and then emitted from the light exit port. 1 is a cross-sectional view showing the structure of a conventional edge-lit backlight module. The edge-lit backlight module 1 〇〇 comprises at least a side light source i 丨〇 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 丨2〇 has a plurality of V-Cut structures 121, each of which is ν The -Cut structure 121 has a first reflecting surface 121a (about 40 degrees to 45 degrees from the horizontal plane) and a second reflecting surface 121b (about 10 degrees from 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 〇), the lateral illuminating light can be reflected once by the first reflecting surface 121a. However, the light guide plate 120 has a plurality of V-Cut structures 121 which are only suitable for the side light source 丨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 22 of the edge-lit backlight module 2 〇 also has a plurality of V-Cut structures 221 ′ each of the ν-Cut structures 221 also has a first reflecting surface 221a (about 40 degrees from the horizontal plane) ~45 degrees) and the second reflecting surface 22 lb (about 17 degrees ~ 2 degrees from the horizontal plane), to reflect light to the positive direction. When the range of the lateral light emission angle 0' of the side light source 210 is large (about 3 degrees), the lateral light emission can be reflected to the first reflection surface 221a' via the second reflection surface 221b to perform secondary reflection of light. (S) 6 1334939 However, the ridge line that is not reflected to the first reflecting surface 22q cannot form a positive light output, but emits light at an undesired angle, thereby causing improper light-emitting cost and reducing the light-emitting efficiency of the backlight module. [Summary of the Invention]
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: 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0 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，本發明之背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、光反射Therefore, an aspect of the present invention is to provide a light guide plate and an application thereof, which are applicable to various illumination line angles to guide light forward/light: Another aspect of the present invention is to provide a light guide plate and an application thereof. In order to reduce the reflection loss of the light in the light guide plate, the front light output can be improved. A further aspect of the present invention is to provide a light guide plate and an application thereof for uniformly emitting light of the light guide plate. According to an embodiment of the present invention, the backlight module of the present invention includes at least a light source and a light guide plate for light emitting laterally, 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 Light surface, light reflection
面和複數料錢構。出光面_成於導光㈣正面，光反 射面係相對於出光面’此些導光結構係形成於敍射面上， 其中每-此些導光結構具有相對的第—反射面和第二反射 面’而第-反射面具有第一斜面和第二斜面，且第一斜面與 水平面的第-夹㈣小於第二斜面與水平面的第二爽角。 又’根據本發明之實施例，上述每—此些導光結構具有 二對的第-反射面和第二反射面’而第一反射面具有第一曲 曲=二曲面，且第一曲面與水平面的第-夾角係小於第二 曲面與水平面的第二夾角。 1334939 因此’本發明之導光板及其應用可遍用於各種發光入線 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 模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3〇〇可設置於一液晶顯示 模組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3〇〇包含有殼體 310、光源320、導光板330、反射板340及光學膜片組350。 殼體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32〇係設置於殼體31〇之一側，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330的下方，用以反射發光。光 學獏片組350設置於導光板330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31〇具有光出射口 311 和腔室312。光出射口 311係用以出光，在本實施例中，殼 體31〇可形成密閉結構之燈罩，用以避免光線從光出射口 311 以外的部分洩漏出去，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Face and plural money structure. The light-emitting surface is formed on the front surface of the light guide (four), and the light-reflecting surface is formed on the light-emitting surface with respect to the light-emitting surface, wherein each of the light-guiding structures has a relative first-reflecting surface and a second The reflecting surface ′ and the first reflecting surface have a first inclined surface and a second inclined surface, and the first clip (four) of the first inclined surface and the horizontal plane is smaller than the second refreshing angle of the second inclined surface and the horizontal plane. In addition, according to an embodiment of the present invention, each of the light guiding structures has two pairs of first reflecting surfaces and second reflecting surfaces ' and the first reflecting surface has a first curved shape=two curved surfaces, and the first curved surface is The first angle of the horizontal plane is smaller than the second angle of the second curved surface to the horizontal plane. 1334939 Therefore, the light guide plate of the present invention and its application can be widely used in various illumination line angle ranges' and can improve the positive light output effect of light, and can improve the uniformity of overall light output. [Embodiment] Please refer to FIG. 3, which is a cross-sectional view showing a backlight module 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 3 can be disposed under a liquid crystal display module L for use as a side light type of a liquid crystal display (LCD). Backlight module. The backlight module 3A includes a housing 310, a light source 320, a light guide plate 330, a reflection plate 340, and an optical film group 350. The housing 310 is provided with a light source 32A, a light guide plate 33, a reflection plate 34, and an optical film group 350. The light source 32 is disposed on one side of the casing 31 for laterally emitting light to the light guide plate 330, and is guided by the light guide plate 330 to emit light to be positively emitted. The reflector is disposed below the light guide plate 330 for reflecting the light. The optical cymbal set 350 is disposed above the light guide plate 330 for optical improvement actions for different purposes. As shown in Fig. 3, the casing 31 of the present embodiment has a light exit opening 311 and a chamber 312. The light exit opening 311 is used to emit light. In the embodiment, the housing 31 can form a lamp cover of a closed structure to prevent light from leaking out of the light exit opening 311. The housing 310 is opaque. The material is made, for example, a plasticized material, a metal material, or a combination of the above. The chamber 312 is formed on one side of the light guide plate 330 for accommodating the light source 32, and the inner side wall 312a of the chamber 312 can be coated with a light reflecting material such as gold, silver, aluminum or
CS 8 1334939CS 8 1334939
述材質之組合，用以使一部分未射入導羌板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)。 凊參照第4圖和第5圖’其繪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33〇係設置於 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 33〇包含有出光面331、光反射面332及複數個導光結構 333出光面331係位於導光板330的正面，且對應於殼體 310的光出射口 31卜以使光線發出。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 33i來形成正向出光（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 cut結構盆且有 相對的第-反射面333a和第二反射面⑽，而第一反射面 如a具有第一斜面333a，和第二斜面现”，且第一斜面 333a’與水平面的第一夾角0俜 η ι你小於第二斜面333a”與水平 面的第二夹角02。其中，第- 六τ罘一反射面333b與水平面的夾角 β 3約為3 8度~4 8唐，第-—名;，，，， ^ I第斜面333a，與水平面的第-夾角0 1係實質小於等於10度（$10度）， 及）而第二斜面333a”與水平 面的第二夾角02約為17度〜2〇度。 1334939 如第4圖和第5圖所示，本實;^例之反射板340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)、反射式增亮膜 (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，且其棱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 排列的長條狀棱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。 (: S ) 10 當本實施例之背光模組之光源32〇 .的發光入線角度 範圍較小（例如小於10度），且導光板330的出光方向與出光η 面331之法線方向的夾角係預設為正負5度（±5度）以内時（意 即預设為正向出光）。此時，光源32()的光線可利用第二 反射面333b來進行一次反射出光。 當光源320的發光入線角度θίη範圍較大（例如約3〇 度）’且導光板330的出光方向與出光面331之法線方向的夾 角係預設為正負5度（±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La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k在經第一斜面333&，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2.1mm， 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% 。 當光線L3係入射至第一反射面333a的第二斜面333 a” 時’光線L3可由第二斜面333 a”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320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 距離山和旬係隨著導光結構333與光源320之距離的增加 而縮小（即dpd2)，藉以避免導光板330在遠離光源32〇處的 1334939 進行一次反射出光。 當發光入線角度0 in範圍較大（例如約3〇度），且導光板 430的出光方向與出光面431之法線方向的夹角係預設為正 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430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0 in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側的情形，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， 馨 第二實施例之導光板530為楔形板結構，其中在接近光源320 處之導光板530的厚度較厚，而在遠離光源32〇處之導光板 53〇的厚度較薄。因此，本實施例之導光板530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。 4參照第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The combination of materials is used to cause a portion of the incident light that is not incident on the deflector 330 to be reflected back into the light guide plate 330. The light source 320 of the present embodiment is, for example, a Cold Cathode Fluorescent Lamp (CCFL) Hot Cathode Fluorescent Lamp (HCFL) or a Light Emitting Diode (LED). Referring to Figures 4 and 5, a schematic cross-sectional view of a light guide plate in accordance with a first embodiment of the present invention is shown. The light guide plate 33 of the present embodiment is disposed on one side of the light source 320 to guide 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 33A includes a light-emitting surface 331, a light-reflecting surface 332, and a plurality of light-guiding structures 333. The light-emitting surface 331 is located on the front surface of the light guide plate 330, and corresponds to the light exit opening 31 of the housing 310 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 and formed to form a positive light through the light emitting surface 33i. That is, the light exiting direction may be substantially perpendicular to the light exiting surface 331). Each of the light guiding structures 333 is, for example, a v-cut structure basin and has opposite first-reflecting surfaces 333a and second reflecting surfaces (10), and the first reflecting surface such as a has a first inclined surface 333a, and the second inclined surface is present. And the first angle 0 俜 ι of the first slope 333a' and the horizontal plane is smaller than the second angle 02 of the second slope 333a" and the horizontal plane. Wherein, the angle θ3 of the first-sixth 罘-reflecting surface 333b and the horizontal plane is about 38 degrees ～4 8 tang, the first-name;,,,, the first slanting surface 333a, and the first angle of the horizontal plane 0 1 Is substantially less than or equal to 10 degrees ($10 degrees), and) the second angle 333a" and the second angle 02 of the horizontal plane is about 17 degrees to 2 degrees. 1334939 as shown in Figures 4 and 5, the present; The reflecting plate 340 of the example preferably corresponds to the shape of the light reflecting surface 332, and is disposed closely below the light guiding plate 330, and the reflecting plate 340 is configured to totally reflect the light incident on the light reflecting surface 332. It is to be noted that the light reflecting surface 332 of the light guide plate 330 may also be coated with a material having high reflectivity, such as a metal material, to reflect incident light, thereby further replacing the reflecting plate 340. The optical film group 350 of the present embodiment is, for example, It is: a diffusion sheet, a ruthenium film, a brightness enhancement film (BEF), a reflective brightness enhancement film (Dual Brightness Enhancement Film; DBEF), a non-multilayer film reflective polarizer (Diffused Reflective Polarizer Film; DRPF) or the above Any combination of light guiding light Above the plate 330, the optical improvement operation for different purposes of the light output from the light guide plate 330 can be performed. Referring to FIGS. 6 and 7, FIG. 6 is a diagram showing the backlight according to the first embodiment of the present invention. FIG. 7 is a schematic top plan view of a partial backlight module according to a first embodiment of the present invention. It is noted that when the optical film set 350 is, for example, a long strip, due to The light guiding structure 333 of the light guide plate 330 can further enhance the light collecting effect in the direction parallel to the light guiding structure 333. Therefore, the optical film set 350 can be a single elongated strip, and the prism structure is substantially perpendicular to the guide. The light guiding structure 333 of the light plate 330 can greatly enhance the concentrating effect, and it is not necessary to provide two long prismatic prisms arranged in a vertical staggered manner to enhance the concentrating effect, thereby saving the arrangement of the long strips. When the 稜鏡 structure of the long strip is perpendicular to the light guiding structure 333 of the light guide plate 330, the long strips can be slightly offset by ±45 degrees to the sides without affecting the concentrating effect. S) 10 when this embodiment The light source entrance angle range of the light source 32 背光 of the backlight module is small (for example, less than 10 degrees), and the angle between the light exiting direction of the light guide plate 330 and the normal direction of the light exiting surface 331 is preset to be plus or minus 5 degrees (±5). In the case of the light source 32 (), the light of the light source 32 () can be reflected once by the second reflecting surface 333b. When the light source 320 has a large range of the light incident angle θίη (for example) When 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). At this time, the light emission of the light source 32A can be secondarily reflected by the first reflecting surface 333a or the total reflection can be continued to travel. When the light ray is incident on the first inclined surface 333a' of the first reflective surface 333a, the light ray 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. The overall illumination of the light guide plate 330 can be uniform. In addition, the light ray k can relatively reduce the number of total reflections in the traveling path after the reflection by the first slope 333 & amp, thereby reducing the loss of light intensity. For example, when the length of the light guide plate 330 is 195 mm, the thickness is 2.1 mm, and the light entrance angle is 0; when it is 38 degrees, the number of total reflections in the travel path is better than that of the known light guide plate by optical simulation. When the light L3 is incident on the second inclined surface 333 a" of the first reflecting surface 333a, the light ray L3 may be reflected by the second inclined surface 333 a" to the second reflecting surface 333b to form a positive secondary reflection. It is worth noting that, as the light is farther away from the light source 320, the light intensity is weaker. Therefore, in this embodiment, the distance between each of the two light guiding structures 333 is from the mountain and the ray system. The distance between the 333 and the light source 320 is reduced (ie, dpd2), so as to prevent the light guide plate 330 from reflecting light once at 1334939 away from the light source 32. When the light entrance angle is in the range of 0 in (for example, about 3 degrees), When 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 L5 incident on the first curved surface 433a can be shaped to be totally reflected. And continuing to travel to the light guide plate 430 The light L6 incident on the second curved surface 433a, can be reflected by the second curved surface 433a" 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 of 0 in range to guide the light to emit light in the forward direction, and reduce the reflection loss of the light in the light guide plate 430, thereby increasing the utilization rate of the light and the light output. effectiveness. In addition, it is possible to improve the situation where the light of the conventional light guide plate is concentrated on one side to uniformize the light output of the entire light guide plate. Referring to Figure 9, there is shown a cross-sectional view of a light guide plate in accordance with a third embodiment of the present invention. In the following, only the differences between the embodiment and the first embodiment will be described, and the similarities will not be described herein. Compared with the first embodiment, the light guide plate 530 of the second embodiment is a wedge plate structure, wherein the thickness of the light guide plate 530 near the light source 320 is thicker, and the light guide plate 53 is away from the light source 32〇. Thinner thickness. Therefore, the light guide plate 530 of the present embodiment can further enhance the light intensity of the light guide plate 530 away from the light source 320, thereby uniformly illuminating the light intensity of the light guide plate 530, and avoiding the situation that the light guide plate emits light unevenly. 4 is a cross-sectional view showing 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 are not described herein again. Compared to the first implementation
(S 13 1334939 例第四實施例之導光板630的出年面631設有複數個突出 結構631a，藉以使由光反射面632之導光結構633所導引的 光線可進一步修正方向，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9〇度〜135度）或半 圓形。另外，當此些突出結構631a例如複數個為長條狀稜形 結構時，此些長條狀稜形結構較佳係垂直於導光板33〇的導 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 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。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’ g可作各種之更動與濁飾，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 更明顯易懂，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 1334939 晶顯示模組的剖面示意圖。 第4圖係繪示依照本發明 杏 W ^之第一實施例之導光板的剖面 示意圖。 第5圖係繪示依照本發明 ^ .. . , ^ , t 十况乃之卓一實施例之導光板的剖面 示意圖。 第6圖翁示依照本發明之第—實施例之背純組的立 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。 第8圖係繪示依照本發明之第二實施例之導光板的剖面 示意圖。 第9圖係繪示依照本發明之第三實施例之導光板的剖面 示意圖。 第10圖係繪示依照本發明之第四實施例之導光板的剖 面示意圖。(S 13 1334939 The fourth surface of the light guide plate 630 of the fourth embodiment is provided with a plurality of protruding structures 631a, so that the light guided by the light guiding structure 633 of the light reflecting surface 632 can be further corrected to increase the direction to increase The concentrating effect improves the front luminance and can replace the arrangement of the cymbal to reduce the component cost. The protruding structures 631a are, for example, prismatic (the apex angle is, for example, 9 〜 to 135 deg) or semicircular In addition, when the protruding structures 631a are, for example, a plurality of elongated prismatic structures, the elongated prismatic structures are preferably perpendicular to the light guiding structure 333 of the light guide plate 33〇, thereby greatly enhancing the concentrating light. According to the embodiment of the present invention, 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. In addition, the light guide plate of the present invention can improve the overall light output uniformity. Sexuality, avoiding the situation where the light intensity is concentrated on one side of the light guide plate. Although the invention has been disclosed above by way of example, it is not intended to limit the invention, and anyone skilled in the art does not The spirit and scope of the invention may be varied and varied, and the scope of the invention is defined by the scope of the appended claims. Other objects, features, advantages and embodiments will be more apparent and understood. Detailed description of the drawings is as follows: Figure 1 is a cross-sectional view showing a structure of a conventional edge-lit backlight module. FIG. 3 is a cross-sectional view showing a backlight module and a liquid 14 1334939 crystal display module according to a first embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 5 is a cross-sectional view showing a light guide plate according to a first embodiment of the present invention. FIG. 5 is a cross-sectional view showing a light guide plate according to an embodiment of the present invention. 6 is a perspective view of a back-purity group according to a first embodiment of the present invention. FIG. 7 is a top plan view showing a partial backlight module according to a first embodiment of the present invention. Second embodiment of the present invention A schematic cross-sectional view of the light panel. FIG. 9 based on the light guide plate schematic cross-sectional view of the embodiment in accordance with the third embodiment of the present invention is shown. FIG. 10 illustrates a system in accordance with the cross-sectional schematic view of a fourth embodiment of the light guide plate of the embodiment of the present invention.
【主要元件符號說明】 0、Θ’、0 in:發光入射角度 Θ,、05:第一夾角 θ2、06:第二夾角 Θ 3 ' Θ 6 :夾角 L :液晶顯示模組 山、d2 :間隔距離 L!、L2、L3、L4、L5、L6 :光線 100 :背光模組 110 :側光源 120 :導光板 121 : V-Cut結構 15[Description of main component symbols] 0, Θ', 0 in: illuminating incident angle Θ, 05: first angle θ2, 06: second angle Θ 3 ' Θ 6 : angle L: liquid crystal display module mountain, d2: interval Distance L!, L2, L3, L4, L5, L6: Light 100: Backlight module 110: Side light source 120: Light guide plate 121: V-Cut structure 15