200919025 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種背光模組及其應用’且特別是有 關於可改變光線進入導光板之行進路徑之背光模組及其在 顯示裝置上的應用。 【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 不器（Liquid Crystal Display ; LCD)市場的蓬勃發展。液晶 顯不器具有高畫質、體積小、重量輕、低驅動電壓及低消 耗功率等優點，因此被廣泛應用於個人數位助理（Pers〇nai 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 ; ic)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。 目剛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 不益中相當關鍵之零組件之一。背光模組可依照光源入射 位置的不同为成側光式入光（Edge Lighting)與直下式入光 (Bottom Lighting)兩種，通常係運用於各種資訊、通訊、 肩費產品之中，藉以提供上述液晶顯示器的一個面光源。 200919025 請參照第1A圖，第1A圖係依照習知技術一種側光式 背光模組的俯視示意圖。習知的側光式背光模组91 〇係藉 由導光板911導入側向光源912,並通過不同光學目的之光 學膜片（未續·示）加以反射與折射’形成輝度均勻的面光源後 射出。然而’當側光式背光模組910的側向光源912為複 數個點光源[例如發光二極體（Light Emitting Diode ; LED)] 時’由於在此些點光源之間具有光線未照線到的地方，因 而形成複數個三角形暗帶913,影響背光效果，並減少顯示 可視區（Viewable Area)901的面積。 請參照第.1B圖，第1B圖係依照習知技術另一種側光 式背光模組的局部側視示意圖。當背光模組92〇的側向光 源 922 例如為冷陰極燈管（c〇ld cathode FlU0rescent Lamp ; CCFL)時，由於光線係以特定角度入射於導光板921中，因 而至少需特定距離d來出光或反射光線，亦導致可視區的 面積受到限縮。200919025 IX. Description of the Invention: [Technical Field] The present invention relates to a backlight module and an application thereof, and particularly to a backlight module capable of changing a path of light entering a light guide plate and a display device thereof Applications. [Prior Art] With the continuous innovation of the information and communication industry, the market for Liquid Crystal Display (LCD) is booming. The LCD display has the advantages of high image 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 recording and playback. Consumer communications or electronic products such as video cameras, notebook computers, desktop displays, automotive displays, and projection televisions. Coupled with the rapid advancement of Integrated Circuit (IC) industry and LCD manufacturing technology, these consumer communications or electronic products are also moving toward light, thin, short and small trends. Especially in terms of computer products, in addition to high-performance, high-speed desktop computers, portable notebooks are highly valued and valued. Most of the liquid crystal displays commonly found 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 used for both Edge Lighting and Bottom Lighting according to the incident position of the light source. It is usually used in various information, communication and shoulder products. A surface light source of the above liquid crystal display. 200919025 Please refer to FIG. 1A. FIG. 1A is a schematic top view of a side-lit backlight module according to the prior art. The conventional edge-lit backlight module 91 is introduced into the side light source 912 through the light guide plate 911, and is reflected and refracted by optical films of different optical purposes (not shown) to form a uniform surface light source. Shoot out. However, when the lateral light source 912 of the edge-lit backlight module 910 is a plurality of point light sources (for example, Light Emitting Diodes (LEDs)], the light between the light sources is not illuminated. The place thus forms a plurality of triangular dark bands 913, which affects the backlight effect and reduces the area of the display viewable area 901. Please refer to FIG. 1B. FIG. 1B is a partial side elevational view of another edge-lit backlight module according to the prior art. When the lateral light source 922 of the backlight module 92 is, for example, a cold cathode fluorescent lamp (CCFL), since the light is incident on the light guide plate 921 at a specific angle, at least a specific distance d is required to emit light. Or reflecting light, which also causes the area of the visible area to be limited.
【發明内容】 因此本發明之—方面係在於提供一種背光模組及其應 用，藉以湘光偏折件來改變紐的行進路徑，以擴大光 線的照射範圍，以可減少f光模㈣三角暗帶情形，增 加可視區面積。 本發明之又一He -r-" ^ 面係在於提供一種背光模組及其應 用，藉以縮短光線在導# ^ s 等先板中出光或形成反射的距離，擴 大顯示可視區的面積。 β 本發明之又一卞 ^面係在於提供一種背光模组及其應 200919025 用’：:=光線的照射範圍，而達到不同的光學效果。 根據本發明之實施例，本發明之 =導導光板及光偏折件。導光板係設置於光源有 出光面及光反射面。出光面係形成 於導先㈣正面，歧射面制目對㈣光面。 设置於光源與導光板之間，Μ光偏折件與光源之間具ί 間隙，而光偏折件與導光板之間具有另—間隙，且光偏 折件的光折射率係不同於導光板的光折射率。 又，根據本發明之實施例，本發明之背光模組可應用 於液晶顯示裝置中。 因此，本發明之背光模組可藉由光偏折件來改變光線 的行進路徑’以達到不同的光學效果，並可減少背光模组 中的三角暗帶情形。 【實施方式】 請參照第2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。本實施例背光模組 100可組合一液晶顯示模組200，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100包含有殼體110、光源120、導光板130、反射板14〇、 光學膜片組150及至少一光偏折件16〇。殼體110係用以裝 設光源120、導光板130及反射板14〇。光源12〇係設置於 殼體110之一側，用以側向發光至導光板130，並由導光板 130來導引發光。反射板140設置於導光板130的下方，用 以反射發光。光學膜片組150設置於導光板13〇的上方， 200919025 、進行不同目的之光學改善動作。光偏折件160係設置於 光源120和導光板13〇之間，用以偏折光線進入導光板13〇 的方向。 如第2圖所示，本實施例之殼體】1〇具有光出射口 m 和腔室112。光出射口 ln係用以出光，在本實施例中，殼 體110可形成密閉結構之燈罩，用以避免光線從光出射口 hi以外的部分洩漏出去，其中殼體110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112係形成於導光板130的—側，用以容置光源12〇，腔 室Π2的内側側壁U2a可塗佈有光反射材質，例如金、銀、 紹或上述材質之組合’用以使—部分未射入導光板130的 入射光可再反射至導光板13〇之中H本實施例之光 源120例如為：冷陰極燈管（c〇ld Cath〇deSUMMARY OF THE INVENTION Therefore, an aspect of the present invention is to provide a backlight module and an application thereof, by which a light-reducing member of a light is used to change a traveling path of a New Zealand to expand a range of illumination of light, thereby reducing a dimming mode of the optical mode (four) In the case of banding, increase the area of the visible area. Another He-r-" surface of the present invention is to provide a backlight module and an application thereof, thereby shortening the distance of light emitted or reflecting in the first plate such as the guide #^s, and expanding the area of the visible area. Another aspect of the present invention is to provide a backlight module and its illumination range of 200919025 with '::= light, to achieve different optical effects. According to an embodiment of the present invention, the present invention is a light guide plate and a light deflecting member. The light guide plate is disposed on the light emitting surface and the light reflecting surface of the light source. The light-emitting surface is formed on the front side of the lead (4), and the astigmatism surface is made to the (four) smooth side. Between the light source and the light guide plate, there is a gap between the light deflecting member and the light source, and the light deflecting member and the light guide plate have another gap, and the light refractive index of the light deflecting member is different from the guide The refractive index of the light plate. Further, according to an embodiment of the present invention, the backlight module of the present invention can be applied to a liquid crystal display device. Therefore, the backlight module of the present invention can change the traveling path of the light by the light deflecting member to achieve different optical effects, and can reduce the triangular dark band situation in the backlight module. [Embodiment] Please refer to FIG. 2, 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. The backlight module 100 of the present embodiment can be combined with a liquid crystal display module 200 for use as an edge-lit backlight module of a liquid crystal display (LCD). The backlight module 100 includes a housing 110, a light source 120, a light guide plate 130, a reflective plate 14A, an optical film set 150, and at least one light deflecting member 16A. The housing 110 is used to mount the light source 120, the light guide plate 130, and the reflection plate 14A. The light source 12 is disposed on one side of the housing 110 for laterally emitting light to the light guide plate 130, and is guided by the light guide plate 130 to emit light. The reflection plate 140 is disposed below the light guide plate 130 to reflect light. The optical film group 150 is disposed above the light guide plate 13A, and the optical improvement operation for different purposes is performed in 200919025. The light deflecting member 160 is disposed between the light source 120 and the light guide plate 13A for deflecting light into the direction of the light guide plate 13A. As shown in Fig. 2, the housing of this embodiment has a light exit opening m and a chamber 112. The light exit port ln is used for light emission. In the embodiment, the housing 110 can form a lamp cover with a closed structure to prevent light from leaking out of the light exit port hi. The housing 110 is made of an opaque material. It is made, for example, a plasticized material, a metallic material or a combination of the above. The chamber 112 is formed on the side of the light guide plate 130 for accommodating the light source 12A. The inner side wall U2a of the chamber Π2 may be coated with a light reflecting material such as gold, silver, or a combination of the above materials. The incident light that is not incident on the light guide plate 130 can be reflected back into the light guide plate 13A. The light source 120 of the embodiment is, for example, a cold cathode lamp (c〇ld Cath〇de).
Lamp ； CCFL) ^ ^ ^ f (H〇t Cathode Fluorescent Lamp ； HCFL)或發光二極體（Light Emiuing Di〇de ; led)。 如第2圖所示，請參照第2圖至第4圖，第3圖係繪 示依照本發明之第一實施例之背光模組的局部俯視示意 圖，第4圖係緣示依照本發明之第一實施例之背光模組的 俯視不意圖。本實施例之導光板13〇係設置於光源的 -側’以導引出光’導光板13〇例如係利用射出成型的方 式來製成平板形結構或楔形板結構，其材質例如為聚甲基 丙烯酸甲月旨（PMMA)。導光板13〇包含有出及光二 射面132。出光面131係位於導光板13〇的正面，且對應於 殼體110的光出射口 1U ’以使光線發出。出光面⑶的表 面可選擇設有複數個突出結構（未㈣），例如稜形或半圓 200919025 形藉以it #修正光線的方向，而增加聚光效果。光反 射面13^位於導光板m的底面，且相對於出光面⑶。 如第2圖所7F，本實施例之導光板130可設有導光結 構（未緣不）於光反射面132 ±，藉以反射導引由光源⑽ 所發出的光線可由出光面131來射出，較佳為正向射出(正 向出光）。導光板130的導光結構例如係呈連續性的v形結 構’亦’ V_Cut結構（例如係利用射出成型或微切削成型 的方式來开y成）、霧面結構（例如係利用喷吵處理來形成）、 散射點結構（例如係利用網板印刷或-體成型來形成），藉以 導引由光偏折件16G進人導光板13G的光線可充分地由出 光面13 1來射出。 值付注意的是，導光板130之出光面131亦可具有霧 面處理或散射點設計，藉以均勻化導光板13〇的出光，減 少出光不均（Mura)的現象。 再者，當導光板130為楔形板結構時，導光板13〇可 選擇未設置導光結構，而係藉由導光板13〇的楔形板結構 來形成具有斜面角度的光反射面132,以反射光線由出光面 13 1射出。 如第2圖所示，本實施例之反射板14〇較佳可對應於 光反射面132的形狀，以密合地設置於導光板13〇的下方， 用以使入射至光反射面132的光線形成全反射。值得注意 的是，導光板130的光反射面132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140。 如第2圖所示，本實施例之光學膜片組15〇例如為： 200919025 擴散片、稜鏡片、逆稜鏡片（Turning Prism Sheet)、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130的上方，用以使由導光板13〇 的出光可再進行不同目的之光學改善動作。Lamp; CCFL) ^ ^ ^ f (H〇t Cathode Fluorescent Lamp; HCFL) or Light Emuing Di〇de (LED). As shown in FIG. 2, please refer to FIG. 2 to FIG. 4, FIG. 3 is a partial top plan view of a backlight module according to a first embodiment of the present invention, and FIG. 4 is a schematic diagram according to the present invention. The top view of the backlight module of the first embodiment is not intended. The light guide plate 13 of the embodiment is disposed on the side of the light source to guide the light. The light guide plate 13 is formed into a flat plate structure or a wedge plate structure by, for example, injection molding, and the material thereof is, for example, polymethyl. Acrylic Amethyst (PMMA). The light guide plate 13A includes a light emitting surface 132. The light exiting surface 131 is located on the front surface of the light guide plate 13A and corresponds to the light exit opening 1U' of the housing 110 to emit light. The surface of the light-emitting surface (3) may be provided with a plurality of protruding structures (not (four)), such as a prismatic or semi-circular shape. The shape of the light is increased by the use of the ## correction light direction. The light reflecting surface 13 is located on the bottom surface of the light guiding plate m with respect to the light emitting surface (3). As shown in FIG. 2F, the light guide plate 130 of the present embodiment can be provided with a light guiding structure (not edged) on the light reflecting surface 132±, whereby the light emitted by the light source (10) can be emitted by the light emitting surface 131. It is preferably a forward shot (positive exit). The light guiding structure of the light guide plate 130 is, for example, a continuous v-shaped structure 'also' V_Cut structure (for example, by means of injection molding or micro-cutting), and a matte structure (for example, using a blasting process) The formation of the scattering point structure (for example, by screen printing or body molding), whereby the light entering the light guide plate 13G by the light deflecting member 16G can be sufficiently emitted from the light emitting surface 13 1 . It is noted that the light-emitting surface 131 of the light guide plate 130 may also have a matte treatment or a scattering point design to uniformize the light output of the light guide plate 13 to reduce the phenomenon of light emission (Mura). Moreover, when the light guide plate 130 has a wedge plate structure, the light guide plate 13 can be selected to have no light guiding structure, and the light reflecting surface 132 having a slope angle is formed by the wedge plate structure of the light guide plate 13 to reflect The light is emitted from the light exit surface 13 1 . As shown in FIG. 2, the reflecting plate 14 of the present embodiment preferably corresponds to the shape of the light reflecting surface 132 so as to be closely disposed below the light guiding plate 13A for incident on the light reflecting surface 132. The light forms a total reflection. It should be noted that the light reflecting surface 132 of the light guide plate 130 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 140. As shown in FIG. 2, the optical film group 15 of the present embodiment is, for example, 200919025, a diffusion sheet, a ruthenium sheet, a Turning Prism Sheet, and a brightness enhancement film (BEF). A Bright Brightness Enhancement Film (DBEF), a Diffused Reflective Polarizer Film (DRPF), or any combination of the above is disposed above the light guide plate 130 for being immersed by the light guide plate 13 The light can be used for optical improvement of different purposes.
L 如第3圖和第4圖所示，本實施例的光偏折件16〇係 δ又置於光源120與導光板130之間’光偏折件16〇例如係 以射出成型的方式來形成長形條狀，藉以使光源12〇的發 光可充分射入光偏折件160中，其中光偏折件16〇與光源 120之間具有一間隙，而光偏折件j 6〇與導光板1 %之間具 有另一間隙，亦即光偏折件160的兩側具有空氣介質（光折 射率為1)。其中，導光板13〇的光折射率〜係不同於光偏 折件160的光折射率nz，以改變光線進入導光板13〇的行 進路枚纟本實施例中，光源】2〇㈣如為複數個點光源(例 如為發光二極體），其排列設置於導光板13〇的一側，導光 板130的光折射率⑴例如為14。此時，光偏折件⑽的 =折射率n2可例如小於導光板i3〇的光折射率〜，較佳為 質"於1與1·4之間’且接近】（例如^)。因此，當光源 120的光線入射至導光板】 守兀衩時，先線可在進入導光板130 後進一步朝兩側橫向偏移， U向擴大先線在導光板130中 的”?、射乾圍，進而減少此歧點光 一元/原之間的三角暗帶情形， 二°^光偏折件160的兩側具有 率的介質(空氣)’因而光線在進入光偏折件⑽ 的方向係相互平行’亦即光線可藉由光偏折件⑽來 10 200919025 進行平行偏移，而纽變光相行進方向。 Π2亦可大於 光板130中 值得注意的是’光偏折件16G的光折射率 導光板130的光折射率〜，藉以集中光線在導 的照射範圍，而達到不同的光學效果。 折件⑽之-側，其鄰接於殼體ug的光出射/二二 使光源120之發光可由入光 …具有例如：v二=t? S板13°’入光 办、、>W#(V-Cut)、s形波浪結構哎袅 :;_1(未緣示)’藉以提升光線的入射效率和光麵合 因此，當本實施例之背光模組1〇〇提供背光源時，由 先源⑽所發出的光線可藉由光㈣件160來改變光線在 導光板130中的人射情形，並可擴大光線在導光板別中 的照射範圍，因而可減少背光模组1〇〇的三角暗帶情形， 而增加顯示可視區的面積。 一 H …、第5圖，其繪示依照本發明之第二實施例之背 光模’，且的局。p剖面示意圖。以下僅就本實施例與第一實施 n P1之相異處進行說明，*其彳目似處則在此不再贅述。相 ^實把例，第一實施例之光源120b例如為冷陰極燈 s ,此時光源120b的光線可在進入導光板13〇後進一步 朝縱向偏移’ 而縮短光線在導光板13()中出光或形成反 射的距離dl’亦即擴大顯示可視區的面積。因此，導光板 130可藉由光偏折件16〇來擴大可視區面積。 一凊參照第6圖，其繪示依照本發明之第三實施例之背 光模組的局部剖面示意圖。以下僅就本實施例與第一實施 200919025 丨門之相異處進仃說明，而其相似處則在此不再贅述。相 第1¼例’第二實施例之背光模組工⑼包含有至少 光源120c和一光偏折件16〇〇,其分別設置於導光板"ο =兩側。此時’此些光偏折件l6Qe可分別導引光線由導光 二：兩側來進入導光板130中’藉以增加背光模組100 、、里，而可適用於大尺寸之背光模組 100，並可夢由光 偏折件16〇C來改變光線在導光板130中的入射情开 电請參照第7A圖和第⑺圖，其緣示依照本發明之第四 二：：：背光模組的局部俯視示意圖。以下僅就本實施， ⑯例間之相異處進行說明，而其相似處則在此耳 述。相較於第-實施例，第四實施例之背光模组⑽ 设有複數個光偏折件I6Gd，此些光偏折件16_光折射率 〜、、係相互不同，且不同於導光板13()的光折射率 」例如.1,1、1,2及，藉以漸進地改變光線的行進路 仅而擴大或集中光線在導光板13〇中的照射範圍。值得 注意的是，此時，此些光偏折件咖相互之間可選擇未具 有間隙（如第7A圖所示）或具有間隙（如第7B圖所示），以漸 進地改變光線的行進路徑。 由上述本發明的實施例可知，本發明之背光模組及其 應用可藉由光偏折件來改變光線的行進路徑，以擴大或集 $光線在導光板中的照射，相不_光學效果（例如、 減少三角暗帶情形）。 · 本發Γ本發明已以實施例揭露如上，然其並非用以限定 2明，任何熟習此技藝者，在不脫離本發明之精神和範 圍内，當可作各種之更動與潤飾，因此本發明之保護範 200919025 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1A圖係依照習知技術_種側光式背光模組的俯視 不意圖。 第圖係依照習知技術另—種側光式背光模 部側視示意圖。 句 第2圖係繪示依照本發明 ^ y . ,b , _ 如乃艾第一實施例之背光模组與 液晶顯示模組的局部剖面示意圖。 、 施例之背光模組的 第3圖係續示依照本發明之第一實 局部俯視示意圖。 第4圖係繪示依照本發明 ^ . . , π、a 个啜月之第一實施例之背光模組的 俯視示意圖。 第5圖係繪示依照本發明 & A 3之第一貫施例之背光模組的 局部剖面示意圖。 第6圖係繪示依照本發明 a , 73之卓二實施例之背光模組的 局部剖面示意圖。 第7A圖和第7B圖係繪示佑昭士改^ 3不诋照本發明之第四實施例之 牙光模組的局部俯視示意圖。 主要元件符號說明】 d ' cU :距離 110 :殼體 ηι ' η2 ' η3 ' π4 '光折射率 1〇〇 :背光模組 13 200919025 111 ： 112a 120、 130 : 132 : 140 ： 160、 200 ： 901 ： 910 ： 912 ： 920 ： 922 : 光出射口 112 : :内側側壁 120b、120c :光源 導光板 131 ： 光反射面L, as shown in FIG. 3 and FIG. 4, the light deflecting member 16 of the present embodiment is further disposed between the light source 120 and the light guide plate 130. The light deflecting member 16 is, for example, injection molded. Forming an elongated strip shape, so that the light of the light source 12 可 can be sufficiently injected into the light deflecting member 160, wherein the light deflecting member 16 〇 has a gap between the light source 120 and the light deflecting member j 6 〇 and the guide There is another gap between the light plates of 1%, that is, the air deflecting member 160 has air media (having a refractive index of 1) on both sides. The light refractive index of the light guide plate 13〇 is different from the light refractive index nz of the light deflecting member 160 to change the traveling path of the light entering the light guide plate 13〇. In the embodiment, the light source is 2〇(4). A plurality of point light sources (for example, light-emitting diodes) are arranged on one side of the light guide plate 13A, and the light refractive index (1) of the light guide plate 130 is, for example, 14. At this time, the =refractive index n2 of the light deflecting member (10) may be, for example, smaller than the refractive index 〜 of the light guide plate i3, preferably between < 1 and 1·4 and close to (e.g., ^). Therefore, when the light of the light source 120 is incident on the light guide plate, the first line can be laterally shifted toward the two sides after entering the light guide plate 130, and the U-direction expands the front line in the light guide plate 130. Encircling, thereby reducing the triangular dark band between the first and the original light, the medium (air) of the two sides of the light deflecting member 160 has a rate of light (the direction of the light entering the light deflecting member (10) Parallel to each other', that is, the light can be parallelly offset by the light deflecting member (10) 10 200919025, and the light shifting direction of the light is changed. The Π2 can also be larger than the light refracting of the light deflecting member 16G. Rate the light refractive index of the light guide plate 130, thereby concentrating the light in the illumination range of the guide to achieve different optical effects. The side of the fold member (10), the light exiting the housing ug/two makes the light source 120 emit light It can be light-in...having, for example, v==t? S plate 13° 'light into the light,> >W# (V-Cut), s-shaped wave structure 哎袅:; _1 (not shown) to enhance light The incident efficiency and the light surface are combined. Therefore, when the backlight module 1 of the embodiment provides a backlight, The light emitted by the source (10) can change the human radiation situation of the light in the light guide plate 130 by the light (four) member 160, and can expand the illumination range of the light in the light guide plate, thereby reducing the triangle of the backlight module In the case of the dark band, the area of the display visible area is increased. One H ..., FIG. 5 is a schematic view showing the backlight mode of the second embodiment of the present invention, and is only a schematic view of the present embodiment. The difference from the first embodiment n P1 is explained, and the details of the first embodiment are not repeated here. For example, the light source 120b of the first embodiment is, for example, a cold cathode lamp s, and the light source 120b at this time. The light can be further shifted toward the longitudinal direction after entering the light guide plate 13 ′ to shorten the distance dl′ of the light emitted or reflected in the light guide plate 13 (ie, the area of the visible area is enlarged. Therefore, the light guide plate 130 can be borrowed The area of the visible area is enlarged by the light deflecting member 16A. Referring to Figure 6, a partial cross-sectional view of the backlight module according to the third embodiment of the present invention is shown. The following is only the first embodiment and the first embodiment. 200919025 Tips for the difference between the two The similarity is not repeated here. The backlight module (9) of the second embodiment includes at least a light source 120c and a light deflecting member 16, which are respectively disposed on the light guide plate. ο = both sides. At this time, the light deflecting members l6Qe can respectively guide the light from the light guide 2: the two sides enter the light guide plate 130, thereby increasing the backlight module 100, and the inner size, and can be applied to a large size. The backlight module 100 can be changed by the light deflecting member 16C to change the incident light of the light in the light guide plate 130. Referring to FIG. 7A and FIG. 7 , the fourth embodiment of the present invention is as follows: :: A partial top view of the backlight module. In the following, only the present embodiment will be described, and the differences between the 16 cases will be explained, and the similarities will be described here. Compared with the first embodiment, the backlight module (10) of the fourth embodiment is provided with a plurality of light deflecting members I6Gd, and the light deflecting members 16_ have different refractive indices, and are different from each other, and are different from the light guide plate. The refractive index of 13() is, for example, .1, 1, 1, and 2, by which the traveling path of the light is gradually changed to expand or concentrate the irradiation range of the light in the light guide plate 13A. It should be noted that at this time, the light deflecting members may choose to have no gap (as shown in FIG. 7A) or have a gap (as shown in FIG. 7B) to gradually change the traveling of the light. path. According to the embodiment of the present invention, the backlight module of the present invention and the application thereof can change the traveling path of the light by the light deflecting member to expand or collect the illumination of the light in the light guide plate, which is not optical effect. (for example, reducing the triangular dark band situation). The present invention has been disclosed in the above embodiments by way of example only, and is not intended to be limited by the scope of the invention. DETAILED DESCRIPTION OF THE INVENTION The present invention as well as the other objects, features, advantages and embodiments of the present invention will become more apparent from the scope of the appended claims. The description is as follows: - Figure 1A is a schematic view of a side-lit backlight module according to the prior art. The figure is a side view of a side-lit backlight module in accordance with conventional techniques. Figure 2 is a partial cross-sectional view showing a backlight module and a liquid crystal display module according to a first embodiment of the present invention. Figure 3 of the backlight module of the embodiment is a schematic view of a first partial top view in accordance with the present invention. Figure 4 is a top plan view showing a backlight module according to a first embodiment of the present invention. Figure 5 is a partial cross-sectional view showing a backlight module according to a first embodiment of the present invention. Figure 6 is a partial cross-sectional view showing a backlight module in accordance with a second embodiment of the present invention. 7A and 7B are partial top plan views showing the tooth-light module of the fourth embodiment of the present invention. Explanation of main component symbols] d ' cU : distance 110 : case ηι ' η2 ' η3 ' π4 'light refractive index 1 〇〇: backlight module 13 200919025 111 : 112a 120, 130 : 132 : 140 : 160 , 200 : 901 : 910 : 912 : 920 : 922 : Light exit port 112 : : Inner side wall 120b , 120c : Light source light guide plate 131 : Light reflecting surface
反射板 15 0 I 160c、160d :光偏折件 161 : 液晶顯示模組 可視區 背光模組 911 側向光源 913 背光模組 921 側向光源 腔室 出光面 光學膜片組 入光面 :導光板 :三角形暗帶 :導光板 14Reflector 15 0 I 160c, 160d: Light deflecting member 161 : Liquid crystal display module visible area backlight module 911 Lateral light source 913 Backlight module 921 Lateral light source chamber light emitting surface Optical film set into the light surface: Light guide plate : Triangle Dark Belt: Light Guide 14