201015163 x , ^^BZITW 28323twf.doc/n 九、發明說明： 【發明所屬的技術領域】 有關於—種光源裝置、以及具有此光源裝置 ::，組與液晶顯示器’且特別是有關於-種能防止導 源的光源裝置、以及具有此光源 装置的穿光模組與液晶顯不器。 ❹ 【先前技術】 隨著科技的進步’液晶顯示器在人類生活中變成一項 不可或缺的用品。液晶顯示器主要是由液晶面板（Li_ Crystal Display panel, LCD panel)及背光模組（BackUght module)所構成，其中液晶面板是由兩片透明基板及配置 於此二透明基板間的液晶層所構成，背光模組則是用以提 供液晶面板所需之光源，使液晶顯示器達到顯示的效果。 圖1為習知一種背光模組的示意圖。請參照圖1，習 知的背光模組100包含：導光板110、光源裝置12〇、反射 ❹ 片130、光學膜片140、第一框架ls()以及第二框架16〇。 導光板110具有入光面112、光反射面Π4及光出射面 116。光源裝置120包括反射罩122及至少一光源124,且 光源124配置於反射罩122内。光源裝置120組裝到導光 板110的一侧，且位於入光面112旁。反射片130設置於 反射罩122與導光板110的光反射面114之間。至少一光 學膜片140配置於導光板11〇上。第一框架150具有底板 152及垂直連接底板152的周緣的多個侧板154。第二框架 5 201015163 7l * — 一…^SZlTW28323twf.doc/n 160組裝至第一框架150上，以將導光板11〇與光源裝置 120固定於第一框架150與第二框架16〇之間。 凊繼續參照圖1，當背光模組1〇〇隨著使用時間的增 長，光源124所產生的熱將使得反射罩122的溫度升高， 反射罩122會因此而熱膨脹。如此一來，反射罩122的兩 编距離dl會變大。更詳細而言，原本反射罩122可良好地 夾持導光板110。然而，由於反射罩122的兩端距離dl變 ❹ 大，所以反射罩122失去夾持導光板110的作用。換言之， 導光板no將進入反射罩122内而撞擊光源124，使得光 源124因而破裂。 再承上述，如圖1所示，當反射罩122的兩端距離dl 過大而未夾緊導光板11〇與反射片130時，光源124所產 生的光線L即有機會從導光板110與反射片130之間進 入，而導致全部的光線L並非僅從導光板11〇的入光面ι12 ^射的情形，此時由背光模組出光之正面觀看時，在鄰近 光源裝置120的第二框架160與光學膜片140交接處會產 β S與第二框架約略平行之亮線，此即稱為漏光現象。當漏 ，現象產生時，背光模組100所形成的面光源較暗、或是 ;度分布將會不均勻。亦即，當使用此背光模組100作為 液晶顯示面板（未繪示）的照明光源時，影像的顯示品質 不良。 【發明内容】 有鑑於此，本發明提供一種光源裝置，可避免因導光 •«ZlTW28323twf.d〇c/n 201015163 板之移動而縣到光_現象，並能降低漏光。 本發明還提供一種背光模組，具有上述的光源裝置， 而能提昇絲的壽命，並提供均勻的面光源。 本發明又提供一種液晶顯示器，具有上述的背光模 組’而能提供具有良好顯示品質的影像。 基於上述，本發明提出一種光源裝置，適於組裝到一 導光板的一側。此光源裝置包括：一反射罩及至少一光源。 ❹ f射罩具有至少_折彎部。反射罩在職設置有折彎部之 ^具有-破孔。光軸置於反射罩内。當光絲置組裝到 導光板的—侧時’折彎部抵住導統的邊緣。 一，本發明再提出—種背光模組，包括：-導光板及至少 :光源裝置。導光板具有至少—人光面。光源裝置組裝到 導光板的入光面旁。此光源裝置包括：一反射罩及至少一 光，。反射罩具有至少_折彎部，此反射罩在對應設置有 折彎部之處具有-破孔。光源配置於該反射罩内。當光源 ❹=置|£裝至導光板的人光面料，折彎雜住導光板的邊 本發明又提出-種液晶顯示器，包括：一液晶顯示面 板及-背光模組。背光模組配置於液晶顯示面板下方，提 供液晶顯示面板所需的面光源。背光模組包括：一導光板 及至少-光源裝置。導光板具有至少一入光面。光源裝置 組襄到導光板的入光面旁。光源裝置包括：一反射罩及至 》-光源。反射罩具有至少—折彎部，反射罩在對應設置 有折彎部之處具有-破孔。光源配置於該反射罩内。當光 201015163 A /v^BZlTW 28323twf.doc/n 源裝置組裝至導光板入光面旁時，折彎部抵住導光板的邊 緣。 ，在本發明的-實施例中，上述的導光板具有至少一入 光面、-光反射面與-光出射面，且折彎部與光反射面設 置在同一侧。 在本發明的-實施例中，上述的折彎部往該反射罩的 内部延伸、且延伸的長度範圍是〇 4公釐〜〇 6公釐。 ❷ 〃在本發明的一實施例中，上述的光源包括冷陰極螢光 燈管或發光二極體陣列。 在本發明的一實施例中，上述的背光模組及液晶顯示 器更包括-反射片，設置於反射罩、與導光板的光反射面 之間。 在本發明的一實施例中，上述的背光模組及液晶顯示 器更包括第一框架，具有底板及垂直連接底板的周緣的多 個側板，其中導光板與光源裝置是配置於底板與側板之間。 〇在本發明的一實施例中，上述的背光模組及液晶顯示 © 器更包括一第二框架，組裝至第一框架上，用以將導光板 與光源裝置固定於第一框架與第二框架之間。 在本發明的一實施例中，上述的導光板包括平板型導 光板或楔形導光板。 在本發明的一實施例中，上述的背光模組及液晶顯示 器更包括至少一光學膜片，配置於導光板上。這些光學膜 片是選自於稜鏡片、擴散片、增光片及其組合其中之―。 在本發明的一實施例中，上述的液晶顯示器更包括一 201015163 ......—BZ1TW 28323twf.doc/n 刖框，將液晶顯示面板組裝到背光模組上。 本發明在光源裝置的反射罩上設置折彎部，因此，折 f部可抵住導光板的邊緣，使導光板不會進入反射罩内撞 擊到光源。再者，由於折彎部與導光板的光反射面設置在 同一側，所以折彎部可阻止部分光線進入反射罩與導光板 的光反射面之間，以降低漏光現象的發生。如此一來，採 用此光源裝置的背光模組，可增加光源的壽命，並且所提 φ 供的面光源的亮度及均勻度都大幅提升。使用上述背光模 組的液晶顯示器亦具有良好的耐用度及顯示效果。 為讓本發明的上述特徵和優點能更明顯易懂，下 文特舉較佳實施例，並配合所附圖式，作詳細說明如 下。 【實施方式】 圖2為本發明較佳實施例的一種背光模組的示意圖。 請參照圖2，此背光模組200包括：一導光板210及一光 ® 源裝置22〇。導光板210具有至少一入光面212。光源裝置 220組裝到導光板210的入光面212旁。光源裝置220包 括：一反射罩222及至少一光源224。反射罩222具有至 少一折彎部222a，此反射罩222在對應設置有折彎部222a 之處具有一破孔222b。光源224配置於反射罩222内。當 光源裝置220組裝至導光板210的入光面212旁時，折彎 部222a抵住導光板210的邊緣。 請再參照圖2，在本實施例中，利用在反射罩222上 9 jiiZ 1TW 28323twf.doc/n 201015163 製作破孔222b ’並將破孔222b處的部分反射罩222向上 彎折而形成折彎部222a。此折彎部222a可抵住導光板 210’因而可避免導光板210向反射罩222内移動而碰撞光 源224。值得注意的是，導光板210可以是平板型導光板 或楔形導光板。導光板210可具有至少一入光面212、一 光反射面214與一光出射面216 ’折彎部222a與光反射面 214設置在同一侧。因此’折彎部222a除了可以阻擋導光 ❹ 板210進入反射罩222内撞擊光源，還可以防止來自光源 224的光線L從導光板210光反射面214與導光板210下 方的反射罩222之間進入。如此一來，此背光模組200可 防止漏光現象的發生進而提供均勻的面光源。 為了使折彎部222a能有效地防止光線L從導光板210 光反射面214與導光板210下方的反射罩222之間進入， 但是又不會影響到光線L自入光面212進入導光板210， 折彎部222a可設定一較佳的延伸範圍’亦即，折—部222a 往反射罩222的内部延伸、且延伸的長度d2範圍較佳是 〇 0.4公釐〜0.6公釐。 請再參照圖2 ’光源224可以採用冷陰極螢光燈管或 發光二極體陣列’在此並不限定光源的種類。此光源224 可發出光線L ’此光線L在背光模組200中的行進路線大 致可說明如下。首先’光線L自導光板210的入光面212 進入導光板210。繼之，光線L往光反射面214的方向行 進’並在光反射面214產生反射，繼而改變行進方向轉往 光出射面216。此外，如圖2所示的背光模組200還可包 jbZITW 28323twf.doc/n 201015163 括一反射片230,設置於反射罩222、與導光板210的光反 射面214之間，進而能夠更加有效地回收自光反射面 出射的部分光線L。 在光反射面214產生反射的光線L會繼續往光出射面 216行進、且穿透光出射面216後離開導光板210。特別是， 穿透光出射面216的光線L可再經過光學膜片240而均句 化，亦即，背光模組200還可包括至少一光學膜片24〇， 配置於導光板210上。這些光學膜片240例如是選自於稜 鏡片、擴散片、增光片及其組合其中之一。 請繼續參照圖2’背光模組200還可包括第一框架 250，具有底板252及垂直連接底板252的周緣的多個侧板 254，其中導光板210與光源裝置220是配置於底板252 與多個側板254之間。再者，背光模組200還可包括第二 框架260，組裝至第一框架250上，用以將導光板21〇與 光源裝置220固定於第一框架250與第二框架260之間。 由於背光模組200的反射罩222設計有折彎部222a ® 的緣故’即使溫度升高造成反射罩222的熱膨脹、外力碰 撞或其他因素，使反射罩222無法有效地夾持導光板21〇 時，折彎部222a仍可以發揮阻擋導光板21〇進入反射罩 222的功用，使導光板210不會撞擊到光源224。另外，折 彎部222a因與導光板210的光反射面214設置在同一侧， 所以可阻擋光源224發出的部分光線L自導光板21〇與導 光板210下方的反射片230 (或反射罩222)之間進入。， 而可減少漏光現象’提昇光線L的使用率。亦即，此背光 11 201015163BZlTW28323twfd〇c/n 模組200可產生均勻以及良好亮度的面光源。 圖3為本發明較佳實施例的另一種背光模組的示意 圖。請參照圖3，此背光模組2〇2與圖2所示的背光模組 200類似，相同的元件標示以相同的符號，並且不予以重 述。在背光模組202中，光源裝置220的反射罩222也具 有折彎部222a的設計。值得注意的是，光源裝置22〇可以 同時配置在導光板210的相對兩側，此時折彎部222a也對 ❹ 應地同時配置在導光板210的相對兩侧，亦即，此時為雙 面入光式的背光模組202。然而，導光板210具有4個侧 面（亦即入光面212)，也可以在每一個側面（亦即入光 面212)都設置有光源裝置22〇，端看所需的亮度而定。 需說明的是’上述具有折彎部222a設計的光源裝置 220並不限定於使用在上述背光模組2〇〇、2〇2中，也可任 意使用於需要安裝光源裝置220的導光元件（未繪示）旁， 由於光源裝置220組裝到導光元件的入光面212旁時，折 彎部222a可抵住導光元件的邊緣，如此一來，可避免導光 ® 元件撞擊光源裝置22〇中的光源224。以下將進一步說明 折彎部222a的多種設計。 圖4A為本發明較佳實施例的一種光源裝置的折彎部 的立體示意圖。圖4B為本發明較佳實施例又一種光源裝 置的折彎部的立體示意圖。請同時參照圖2與圖4A，此折 彎部222a是在反射罩222上挖一個破孔222b後，將部分 反射罩222向上彎折而直接形成折彎部222a。 另外’也可設置有多個折彎部222a，如圖4B所示。 12 201015163 7 '«ZlTW28323twf.doc/n 亦即’在反射罩222上製作多個破孔222b，並且將多個部 分反射罩彎折向上’而形成多個折彎部222a並列的設計。 具有多個折彎部222a構造的光源裝置220可實施於光源 224採用發光二極體陣列時。發光二極體陣列是由多顆發 光二極體（未繪示）所排列而成，將多個折彎部222a與發 光二極體對應設置，不但可有效地防止導光板21〇碰撞發 光二極體，也可防止發光二極體所發出的光線L從導光板 ❹ 210與導光板21〇下方的反射罩222之間進入，而避免漏 光現象。再者’如圖2B的折彎部222a的設計，由於反射 罩222上對應未設置有折彎部222a的區域沒有破孔 222b，所以使反射罩222具有較佳的強度。 圖5為本發明較佳實施例的一種液晶顯示器示意圖。 請參照圖5，此液晶顯示器3〇〇包括一液晶顯示面板31〇 及一背光模組320’背光模組320配置於液晶顯示面板31〇 下方’用以提供液晶顯示面板31〇所需的面光源。 此背光模組320可以採用上述的背光模組2〇〇、202， 〇 相同的元件標示以相同的符號，在此不予以重述。只要光 源裝置220的反射罩222具有折彎部222a的設計，即符合 本發明的精神。值得注意的是’液晶顯示器3〇〇還包括一 前框330 ’將液晶顯示面板310組裝到背光模組320上。 由於背光模组320因折彎部222a的設計，而可保護光源 224免於受到導光板210碰撞’使光源具有較長的使用壽 命；再者也可減少漏光現象，而提供具有良好亮度及均勻 的面光源。所以此液晶顯tf器300具有更好的顯示品質。 综上所述，本發明之光源裝置、背光模組及液晶顯示 13 BZlTW28323twf.d〇c/n 201015163 器，具有下列優點： 光源裝置的反射罩具有折彎部，而能抵住導光板的邊 5 °使導歧不會因温度、外力或其侧素造成移動而撞 擊光源。由於折弯部與導光板的光反射面設置在同一侧， 所以亦能阻止部分光線進入導光板與導光板下方的反射罩 之間^而能，低漏光現象的產生。具有此光源裝置的背光 、二供冗度及均勻度都大幅提升的面光源。具有此背 ❹ 光模組的液晶顯示器有良好的顯示品質。 〜雖然本發明已以較佳實施例揭露如上，然其並非用以 限定本發明，任何所屬技術領域中具有通常知識者，在不 脫離本發明的精神和範圍内，當可作些許的更動與潤飾， 因此本發明的保護範圍當視後附的申請專利範圍所界定 為準。 【圖式簡單說明】 圖1為習知一種背光模組的示意圖。 圖2為本發明較佳實施例的一種背光模組的示意圖。 圖3為本發明較佳實施例的另一種背光模組的示意 圖。 圖4A為本發明較佳實施例的—種光源裝置的折 的立體示意圖。 圖4B為本發明較佳實施例又一種光源裝置 的立體示意圖。 " 圖5為本發明較佳實施例的一種液晶顯示器示意圖。 14 201015163 oZITW 28323twf.doc/n 【主要元件符號說明】 100、200、202、320 :背光模組 110、210 :導光板 112、212 :入光面 114、214 :光反射面 116、216 ·•光出射面 120、220 :光源裝置 122、222 :反射罩 v 124、224 :光源 130、230 :反射片 140、240 :光學膜片 150、250 :第一框架 152、252 :底板 154、254 :側板 160、260 :第二框架 222a :折彎部 〇 222b :破孔 300 :液晶顯示器 310 .液晶顯不面板 330 :前框 dl :反射罩兩端距離 d2 :折彎部延伸長度 L :光線 15201015163 x , ^^BZITW 28323twf.doc/n IX. Description of the invention: [Technical field of the invention] Related to a light source device, and having the light source device::, group and liquid crystal display 'and especially related to A light source device capable of preventing a source, and a light transmissive module and a liquid crystal display having the light source device. ❹ [Prior Art] With the advancement of technology, liquid crystal displays have become an indispensable item in human life. The liquid crystal display is mainly composed of a liquid crystal panel (Li-Crystal Display Panel) and a backlight module (BackUght module), wherein the liquid crystal panel is composed of two transparent substrates and a liquid crystal layer disposed between the two transparent substrates. The backlight module is used to provide a light source required for the liquid crystal panel, so that the liquid crystal display can achieve the display effect. FIG. 1 is a schematic diagram of a conventional backlight module. Referring to FIG. 1, a conventional backlight module 100 includes a light guide plate 110, a light source device 12, a reflective film 130, an optical film 140, a first frame ls (), and a second frame 16A. The light guide plate 110 has a light incident surface 112, a light reflecting surface Π4, and a light emitting surface 116. The light source device 120 includes a reflector cover 122 and at least one light source 124, and the light source 124 is disposed in the reflector cover 122. The light source device 120 is assembled to one side of the light guide plate 110 and is located beside the light incident surface 112. The reflection sheet 130 is disposed between the reflection cover 122 and the light reflecting surface 114 of the light guide plate 110. At least one optical film 140 is disposed on the light guide plate 11A. The first frame 150 has a bottom plate 152 and a plurality of side plates 154 that vertically connect the circumference of the bottom plate 152. The second frame 5 201015163 7l * - a ...^SZlTW28323twf.doc/n 160 is assembled to the first frame 150 to fix the light guide plate 11 and the light source device 120 between the first frame 150 and the second frame 16A. Continuing to refer to FIG. 1, when the backlight module 1 is increased in use time, the heat generated by the light source 124 causes the temperature of the reflector 122 to rise, and the reflector 122 is thus thermally expanded. As a result, the two-part distance d1 of the reflector 122 becomes large. In more detail, the original reflector 122 can hold the light guide plate 110 well. However, since the distance dl between both ends of the reflection cover 122 becomes large, the reflection cover 122 loses the function of sandwiching the light guide plate 110. In other words, the light guide plate no will enter the reflector 122 and strike the light source 124, causing the light source 124 to rupture. Further, as shown in FIG. 1, when the distance dl between the two ends of the reflector 122 is too large to clamp the light guide plate 11 and the reflection sheet 130, the light L generated by the light source 124 has a chance to be reflected from the light guide plate 110. The film 130 enters between, and causes all the light rays L not to be emitted only from the light-incident surface of the light guide plate 11〇. At this time, when viewed from the front side of the backlight module, the second frame adjacent to the light source device 120 is viewed. The intersection of 160 and the optical film 140 produces a bright line which is approximately parallel to the second frame, which is called a light leakage phenomenon. When a leak occurs, the surface light source formed by the backlight module 100 is dark, or the degree distribution is uneven. That is, when the backlight module 100 is used as an illumination source of a liquid crystal display panel (not shown), the display quality of the image is poor. SUMMARY OF THE INVENTION In view of the above, the present invention provides a light source device that can avoid light leakage due to the movement of the light guide plate ««ZlTW28323twf.d〇c/n 201015163, and can reduce light leakage. The invention also provides a backlight module having the above-mentioned light source device, which can improve the life of the wire and provide a uniform surface light source. The present invention further provides a liquid crystal display having the above-described backlight module' to provide an image with good display quality. Based on the above, the present invention proposes a light source device adapted to be assembled to one side of a light guide plate. The light source device comprises: a reflector and at least one light source. The ❹ f shot mask has at least a bend. The reflector is provided with a bend at the job. The optical axis is placed inside the reflector. When the filament is assembled to the side of the light guide plate, the bent portion abuts against the edge of the guide. The invention further provides a backlight module, comprising: a light guide plate and at least: a light source device. The light guide plate has at least a human face. The light source device is assembled to the light incident surface of the light guide plate. The light source device comprises: a reflector and at least one light. The reflector has at least a bent portion, and the reflector has a broken hole at a position corresponding to the bent portion. The light source is disposed in the reflector. When the light source is set to the human light fabric of the light guide plate, the side of the light guide plate is bent and folded. The present invention further proposes a liquid crystal display comprising: a liquid crystal display panel and a backlight module. The backlight module is disposed under the liquid crystal display panel to provide a surface light source required for the liquid crystal display panel. The backlight module comprises: a light guide plate and at least a light source device. The light guide plate has at least one light incident surface. The light source device group is placed next to the light incident surface of the light guide plate. The light source device comprises: a reflector and a light source. The reflector has at least a bent portion, and the reflector has a broken hole at a position corresponding to the bent portion. The light source is disposed in the reflector. When the light source 201015163 A /v^BZlTW 28323twf.doc/n source device is assembled to the light incident surface of the light guide plate, the bent portion abuts against the edge of the light guide plate. In the embodiment of the invention, the light guide plate has at least one light incident surface, a light reflecting surface, and a light emitting surface, and the bent portion and the light reflecting surface are disposed on the same side. In an embodiment of the invention, the bent portion extends toward the inside of the reflector and extends for a length ranging from 公 4 mm to 6 mm. In one embodiment of the invention, the light source comprises a cold cathode fluorescent lamp or an array of light emitting diodes. In an embodiment of the invention, the backlight module and the liquid crystal display further comprise a reflective sheet disposed between the reflective cover and the light reflecting surface of the light guide plate. In an embodiment of the present invention, the backlight module and the liquid crystal display further include a first frame having a bottom plate and a plurality of side plates vertically connecting the periphery of the bottom plate, wherein the light guide plate and the light source device are disposed between the bottom plate and the side plate . In an embodiment of the invention, the backlight module and the liquid crystal display device further include a second frame assembled to the first frame for fixing the light guide plate and the light source device to the first frame and the second frame. Between the frames. In an embodiment of the invention, the light guide plate comprises a flat plate type light guide plate or a wedge type light guide plate. In an embodiment of the invention, the backlight module and the liquid crystal display further comprise at least one optical film disposed on the light guide plate. These optical films are selected from the group consisting of a ruthenium sheet, a diffusion sheet, a brightness enhancement sheet, and combinations thereof. In an embodiment of the invention, the liquid crystal display further includes a 201015163 ......-BZ1TW 28323 twf.doc/n frame, and the liquid crystal display panel is assembled to the backlight module. According to the present invention, the bent portion is provided on the reflection cover of the light source device, so that the folded portion can abut against the edge of the light guide plate, so that the light guide plate does not enter the reflection cover and collide with the light source. Moreover, since the bent portion and the light reflecting surface of the light guide plate are disposed on the same side, the bent portion can block part of the light from entering between the reflector and the light reflecting surface of the light guide plate to reduce the occurrence of light leakage. In this way, the backlight module of the light source device can increase the life of the light source, and the brightness and uniformity of the surface light source provided by the φ are greatly improved. The liquid crystal display using the above backlight module also has good durability and display effect. The above described features and advantages of the present invention will become more apparent from the following description. Embodiments FIG. 2 is a schematic diagram of a backlight module according to a preferred embodiment of the present invention. Referring to FIG. 2, the backlight module 200 includes a light guide plate 210 and a light source device 22A. The light guide plate 210 has at least one light incident surface 212. The light source device 220 is assembled beside the light incident surface 212 of the light guide plate 210. The light source device 220 includes a reflector 222 and at least one light source 224. The reflector 222 has at least one bent portion 222a, and the reflector 222 has a hole 222b at a position corresponding to the bent portion 222a. The light source 224 is disposed within the reflector 222. When the light source device 220 is assembled to the light incident surface 212 of the light guide plate 210, the bent portion 222a abuts against the edge of the light guide plate 210. Referring to FIG. 2 again, in the embodiment, the hole 222b' is formed on the reflector 222 by 9 jiiZ 1TW 28323 twf.doc/n 201015163, and the partial reflection cover 222 at the hole 222b is bent upward to form a bend. Part 222a. The bent portion 222a can abut the light guide plate 210' and thus can prevent the light guide plate 210 from moving into the reflective cover 222 to collide with the light source 224. It should be noted that the light guide plate 210 may be a flat light guide plate or a wedge light guide plate. The light guide plate 210 may have at least one light incident surface 212, a light reflecting surface 214 and a light exit surface 216'. The bent portion 222a and the light reflecting surface 214 are disposed on the same side. Therefore, the 'bending portion 222a can prevent the light guiding plate 210 from entering the reflecting cover 222 and impinging on the light source, and can prevent the light L from the light source 224 from being between the light reflecting surface 214 of the light guiding plate 210 and the reflecting cover 222 under the light guiding plate 210. enter. In this way, the backlight module 200 can prevent the occurrence of light leakage and provide a uniform surface light source. In order to enable the bent portion 222a to effectively prevent the light L from entering between the light reflecting surface 214 of the light guide plate 210 and the reflective cover 222 under the light guide plate 210, the light L is not affected to enter the light guide plate 210 from the light incident surface 212. The bent portion 222a can be set to a preferred extent. That is, the folded portion 222a extends toward the inside of the reflector 222, and the length d2 of the extension is preferably in the range of 〇0.4 mm to 0.6 mm. Referring again to Fig. 2, the light source 224 may be a cold cathode fluorescent lamp or a light emitting diode array. The type of the light source is not limited herein. The light source 224 can emit light L'. The traveling path of the light L in the backlight module 200 can be roughly as follows. First, the light ray L enters the light guide plate 210 from the light incident surface 212 of the light guide plate 210. Then, the light ray L goes in the direction of the light reflecting surface 214 and reflects on the light reflecting surface 214, and then changes the traveling direction to the light exiting surface 216. In addition, the backlight module 200 shown in FIG. 2 can also include a reflective sheet 230 disposed between the reflective cover 222 and the light reflecting surface 214 of the light guide plate 210, thereby being more effective. Part of the light L emitted from the light reflecting surface is recovered. The light L that is reflected by the light reflecting surface 214 continues to travel toward the light exit surface 216 and penetrates the light exit surface 216 and exits the light guide plate 210. In particular, the light ray L that passes through the light exit surface 216 can be further divided by the optical film 240. That is, the backlight module 200 can further include at least one optical film 24 〇 disposed on the light guide plate 210. These optical films 240 are, for example, one selected from the group consisting of prism lenses, diffusion sheets, brightness enhancement sheets, and combinations thereof. The backlight module 200 may further include a first frame 250 having a bottom plate 252 and a plurality of side plates 254 perpendicularly connecting the periphery of the bottom plate 252. The light guide plate 210 and the light source device 220 are disposed on the bottom plate 252 and Between the side plates 254. Furthermore, the backlight module 200 can further include a second frame 260 assembled to the first frame 250 for fixing the light guide plate 21 and the light source device 220 between the first frame 250 and the second frame 260. Since the reflective cover 222 of the backlight module 200 is designed with the bent portion 222a ® , even if the temperature rises, the thermal expansion of the reflective cover 222 , external force collision or other factors cause the reflective cover 222 to effectively hold the light guide plate 21 . The bent portion 222a can still function to block the light guide plate 21 from entering the reflector 222, so that the light guide plate 210 does not hit the light source 224. In addition, since the bent portion 222a is disposed on the same side as the light reflecting surface 214 of the light guide plate 210, part of the light L emitted from the light source 224 can be blocked from the light guide plate 21 and the reflective sheet 230 (or the reflective cover 222) under the light guide plate 210. ) Enter between. , which can reduce the light leakage phenomenon to increase the usage rate of light L. That is, the backlight 11 201015163BZlTW28323twfd〇c/n module 200 can produce a uniform and good brightness surface light source. 3 is a schematic view of another backlight module in accordance with a preferred embodiment of the present invention. Referring to FIG. 3, the backlight module 2〇2 is similar to the backlight module 200 shown in FIG. 2, and the same components are denoted by the same reference numerals and will not be described again. In the backlight module 202, the reflection cover 222 of the light source device 220 also has a design of a bent portion 222a. It should be noted that the light source devices 22 can be disposed on opposite sides of the light guide plate 210 at the same time. At this time, the bent portions 222a are also disposed on opposite sides of the light guide plate 210 at the same time, that is, double-sided at this time. The light-emitting backlight module 202. However, the light guide plate 210 has four side faces (i.e., the light incident face 212), and each of the side faces (i.e., the light incident face 212) may be provided with a light source device 22, depending on the desired brightness. It is to be noted that the light source device 220 having the design of the bent portion 222a is not limited to use in the backlight modules 2A and 2B, and may be used arbitrarily for the light guiding device to which the light source device 220 is to be mounted ( When the light source device 220 is assembled beside the light incident surface 212 of the light guiding element, the bent portion 222a can abut against the edge of the light guiding element, thereby preventing the light guiding device from colliding with the light source device 22 Light source 224 in the crucible. Various designs of the bent portion 222a will be further explained below. Fig. 4A is a perspective view showing a bent portion of a light source device according to a preferred embodiment of the present invention. 4B is a perspective view of a bent portion of a light source device according to a preferred embodiment of the present invention. Referring to Fig. 2 and Fig. 4A at the same time, the bent portion 222a is formed by digging a hole 222b in the reflector 222, and bending the partial reflector 222 upward to directly form the bent portion 222a. Further, a plurality of bent portions 222a may be provided as shown in Fig. 4B. 12 201015163 7 '«ZlTW28323twf.doc/n That is, a plurality of broken holes 222b are formed in the reflecting cover 222, and a plurality of partial reflecting covers are bent upward to form a plurality of bent portions 222a arranged side by side. The light source device 220 having a plurality of bent portions 222a can be implemented when the light source 224 is an array of light emitting diodes. The light-emitting diode array is arranged by a plurality of light-emitting diodes (not shown), and the plurality of bent portions 222a are arranged corresponding to the light-emitting diodes, so as to effectively prevent the light guide plate 21 from colliding with the light-emitting diodes. The polar body can also prevent the light L emitted from the light-emitting diode from entering between the light guide plate 210 and the reflector 222 below the light guide plate 21 to avoid light leakage. Further, as shown in the design of the bent portion 222a of Fig. 2B, since the region of the reflection cover 222 corresponding to the portion where the bent portion 222a is not provided is not provided with the hole 222b, the reflection cover 222 has a preferable strength. FIG. 5 is a schematic diagram of a liquid crystal display according to a preferred embodiment of the present invention. Referring to FIG. 5, the liquid crystal display panel 3 includes a liquid crystal display panel 31 and a backlight module 320. The backlight module 320 is disposed under the liquid crystal display panel 31 to provide a surface required for the liquid crystal display panel 31. light source. The backlight module 320 can adopt the above-mentioned backlight modules 2, 202, and the same components are denoted by the same reference numerals and will not be described again. As long as the reflecting cover 222 of the light source device 220 has the design of the bent portion 222a, it is in accordance with the spirit of the present invention. It is to be noted that the 'liquid crystal display 3' further includes a front frame 330' to assemble the liquid crystal display panel 310 onto the backlight module 320. Since the backlight module 320 is protected from the light guide plate 210 due to the design of the bent portion 222a, the light source has a long service life; the light leakage phenomenon can be reduced, and the brightness and uniformity are provided. Surface light source. Therefore, the liquid crystal display device 300 has better display quality. In summary, the light source device, the backlight module and the liquid crystal display 13 BZlTW28323twf.d〇c/n 201015163 of the present invention have the following advantages: The reflector of the light source device has a bent portion and can withstand the edge of the light guide plate 5 ° causes the guide to not hit the light source due to temperature, external force or its side effects. Since the bent portion and the light reflecting surface of the light guide plate are disposed on the same side, part of the light can be prevented from entering between the light guide plate and the reflector under the light guide plate, and the light leakage phenomenon is generated. A backlight having the light source device and a surface light source with greatly improved redundancy and uniformity. The liquid crystal display having the back light module has good display quality. The present invention has been described above by way of a preferred embodiment, and is not intended to limit the scope of the present invention, and may be modified by a person skilled in the art without departing from the spirit and scope of the invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a conventional backlight module. 2 is a schematic diagram of a backlight module according to a preferred embodiment of the present invention. 3 is a schematic view of another backlight module in accordance with a preferred embodiment of the present invention. 4A is a perspective view showing a folding of a light source device according to a preferred embodiment of the present invention. 4B is a perspective view of still another light source device according to a preferred embodiment of the present invention. " Figure 5 is a schematic view of a liquid crystal display according to a preferred embodiment of the present invention. 14 201015163 oZITW 28323twf.doc/n [Description of main component symbols] 100, 200, 202, 320: backlight module 110, 210: light guide plates 112, 212: light incident surface 114, 214: light reflecting surface 116, 216 ·• Light exit surfaces 120, 220: light source devices 122, 222: reflectors v 124, 224: light sources 130, 230: reflective sheets 140, 240: optical films 150, 250: first frames 152, 252: bottom plates 154, 254: Side plates 160, 260: second frame 222a: bent portion 〇 222b: broken hole 300: liquid crystal display 310. liquid crystal display panel 330: front frame dl: distance between the ends of the reflection cover d2: bending portion extension length L: light 15