1274933 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種外部電極燈管之電極設置及其應用，且 特別是有關於一種將電極設置在外部電極燈管之彎管處，並將此 外部電極燈管應用於顯示螢幕之背光模組中以作為光源。 【先前技術】 由於液晶顯示器（Liquid Crystal Display，LCD)具有體積 薄、重量輕、耗電量少以及無輻射污染等特性，於近年來係曰漸 廣泛使用。其應用產品包括了小尺寸的攜帶式資訊產品如個人 數位助理（PDA)，一般尺寸的筆記型電腦或桌上型之液晶顯示螢 幕。大尺寸之應用產品如30吋〜4〇吋之液晶電視等亦逐漸受到重 視，而在市場上佔有一席之地。 液日日顯示勞幕(LCD)係由—顯示單元（display unit)、一^光模 組、一具有框架之殼體所組裝而成。顯示單元包括一顯示面板 (display panel)，可處理資料訊號之電路板和支撐用之薄膜封裝 以導光板及擴散膜（增亮用之光學 光效率，所使用 性要求較高，因 (Tape Carder Package，TCP)等。背光模組位於顯示單元下方，用 以提供均勻的光源給LCD之顯示單元。光源的提供方式又可分為 側光式背光模組或直下式背光模組。一般而言，2〇吋以下產品採 用的光源方式主要是則側邊的線光源(ccfl)或點光源(LED)，再 之光學膜）等膜片提高光的均勻性及發1274933 IX. Description of the Invention: Technical Field of the Invention The present invention relates to an electrode arrangement for an external electrode tube and an application thereof, and more particularly to an electrode disposed at an elbow of an external electrode tube, and The external electrode tube is applied to the backlight module of the display screen as a light source. [Prior Art] Liquid crystal displays (LCDs) have become more widely used in recent years due to their thinness, light weight, low power consumption, and no radiation pollution. Applications include small-sized portable information products such as personal digital assistants (PDAs), general-sized notebooks or desktop LCD screens. Large-size applications such as LCD TVs of 30吋~4〇吋 are gradually being taken seriously and have a place in the market. The liquid daily display screen (LCD) is assembled by a display unit, a light module, and a framed housing. The display unit includes a display panel, a circuit board for processing data signals, and a thin film package for supporting the light guide plate and the diffusion film (the optical light efficiency for brightening is high, and the use requirement is high because (Tape Carder) Package, TCP, etc. The backlight module is located below the display unit to provide a uniform light source to the display unit of the LCD. The way of providing the light source can be divided into an edge-lit backlight module or a direct-lit backlight module. The light source method adopted by the following products is mainly the side light source (ccfl) or point light source (LED), and then the optical film) and other diaphragms to improve the uniformity of light and hair.
其光源的平面化只需由擴散板(和膜）來完成即 由正下方直接射入， 1274933 可，而不需要導光板的導引，就整體組裝而言，直下式具有較少 的組裝零件。 直下式背光模組至少包括：一殼體、一反射板、光源、一 擴散板和多張擴散膜。直下式的線光源（如U形燈管）排列在殼 體内，利用擴散板和擴散膜將光源發出的光線打散均勻後轉變 為平面光源。而設置在殼體底面的反射板，例如一铭板，則可 將雜散光反射至顯像出光面，以提升整體光能效率。組裝後的 背光模組再與顯示單元組合，即可完成液晶顯示螢幕。 關於直下式背光模組的所使用的線光源，依外形可分為長型 燈管和彎曲外型燈管（如u型燈管），若依發光原理則可分為冷陰 極燈管（Cold Cathode Fluorescent Lamp，CCFL)與目前積極開發中 的外部陰極燈管（External Electrode Fluorescent Lamp，EEFL)。 傳統的背光模組中係以複數支燈管配合轉換器以縱向排列方 式設置於殼體内，但若將燈管加長以改成橫向排列方式，燈管數 和轉換器數目可大幅減少。以30忖等級的背光模組為例，縱向排 列需要20〜30支燈管，橫向排列只需要12〜16支燈管；若是吋 等級的背光模組，縱向排列需要32支燈管，橫向排列只需要2〇 支，就燈管和轉換器數目而言，可降低約3〇%的成本。燈管「長 管化」後，需要使用可降低管電壓的電路來維持燈管操 、 全性（管電壓太高時燈管甚至會喷出火花）；再 — 撐上仍有困擾，_同時支撐_和巾央可邮長m官變在支 =二旦支料位會產生漏電、溫降與輝度不均等現象。科，燈 官長官化的另一發展趨勢是採用彎曲外一 — 字形(稱為U形電極管)，以達到削減燈管的目、又的疋:燈管彎曲成11 除了冷陰極燈管（CCFL)外，目前積極開發中的 脚叫也逐漸嘗試_光模財以作為線光源。外糖極^ 1274933 係將電極形成於燈管外部，隔著燈管加一電壓使燈管發光，其電 極設置型態如美國專利案號6331064(Nishiyama et al·，Hitachi， Ltd.)所揭露，複數支燈管平行設置，每一隻燈管以多個電極環套 在外部，並以多條導線縱向串接該些電極環，接地電壓和高電壓 以穿插方式供給該些導線電壓。外部電極燈管的優點是製作方 便，組裝容易，但設置在直管中的多個電極會使發光面積降低， 影響燈管亮度和均勻度。 【發明内容】 有鑑於此，本發明的目的就是在提供一種外部電極燈管之 電極設置，應用於背光模組中作為光源時，可提升燈管之發光 面積。 根據本發明之目的，提出一種外部電極燈管（EEFL)，至少包 括：一第一直線部、一第二直線部和一第一彎管部，第一彎管部 係分別連接第一直線部該第二直線部之一端，且第一彎管部具有 一第一外部電極。 根據本發明之目的，再提出一種外部電極燈管之組裝結 構，至少包括複數支外部電極燈管，係以平行排列方式組裝於一 夾持機構(holding apparatus)。每一支外部電極燈管至少包括一第 一直線部、一第二直線部和一第一彎管部，第一彎管部係分別連 接第一直線部與第二直線部之一端，且第一彎管部具有一第一外 部電極。 根據本發明之目的，更提出一種背光模組，至少包括：一 殼體(housing)，具有一框架（frame); —擴散板，置於該框架處； 和一發光裝置，置於殼體一底面處用以作為背光模組之一光源。 發光裝置至少包括：複數支外部電極燈管，係以平行排列方式組 1274933 裝於一爽持機構(holding apparatus)，每一支外部電極燈管至少包 括一第一直線部、一第二直線部和一第一彎管部，第一彎管部係 分別連接第一直線部與第二直線部之一端，且第一彎管部具有一 第一外部電極。 根據本發明之目的，又提出一種顯示元件，至少包括一顯 示面板和一背光模組，其中背光模組係與顯示面板電性連接，並 k供顯示面板一亮度。背光模組至少包括一殼體(housing)，具有 一框架（frame); —擴散板，置於框架處；和一發光裝置，置於殼 體一底面處用以作為背光模組之一光源，發光裝置至少包括複數 支外部電極燈管，係以平行排列方式組裝於一夾持機構(holding apparatus)處，每一支外部電極燈管至少包括：一第一直線部、一 第二直線部和一第一彎管部，第一彎管部係分別連接第一直線部 與第二直線部之一端，且第一彎管部具有一第一外部電極。 其中，外部電極燈管例如是U形外部電極燈管或其他具有至 少一彎部形狀之外部電極燈管。 為讓本發明之上述目的、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】 本發明係提出一種外部電極燈管（External Electrode Fluorescent Lamp，EEFL)，可形成一燈管組以應用於背光模組 (Back Light Unit，BLU)中作為線光源，其中每一燈管至少包括 ’ ^弟' 直線部、一第，一直線部和-—第^一彎管部，第' ^彎管部係 分別連接第一直線部與第二直線部之一端，且一外部電極係形 成於第一彎管部處。本發明之外部電極燈管可增加直線部的可 發光面積，提高外部電極燈管之總發光效率。 1274933 以下係以實施例做本發明之詳細說明，然而，實施例並不 會限縮本發明欲保護之範圍。本發明之技術並不限於實施例中 所敘述之模式。 請參照第1A圖，其繪示依照本發明一較佳實施例之外部 電極燈管與炎持結構之示意圖。此結構可應用於一背光模組中以 提供線光源。燈管組合結構1〇包括複數支U型外部電極燈管， 以平行排列方式組裝於一夾持結構(h〇lding apparatus)i。每一支U 型外部電極燈管12，如第1B圖所示，包括一第一直線部122、一 第二直線部124,和-彎管部126，其中彎管部126連接第一直線 部122與第一直線部124。第—直線部122遠離彎管部⑶之一端 係具有-第-外部電極132,第二直線部124遠離彎管冑126之一 端係具有-第二外部電極134，f管部126處則具有—第三外部電 另外，失持結構如第1A圖中的第-夾持部20和第二夾持部 22係分別夾持複數支u型外部電極燈㈣之兩端。第2a圖為第 1A中第-夾持部之放大示意圖。在第一實施例中第一夾持部2〇 係主要以帛-^電》2G1(例如銅片）設置在以絕緣材料形成的第 基座202 i ’ 6又置方法如在第_導電片2〇1上形成螺絲孔位 203,利用螺絲鎖固方式將第―導電片2〇1定位於第一基座搬 處。第-導電片2〇1(如第2B圖所示）上係形成有複數個第一固定 部2〇5和第二固定部施，在形狀、位置與數目上均與該些燈管 12之第一外部電㈣2和第二外部電極134對應地接合。若 結構Π)中有4支U型外部電極燈管12，則第—導電片加上呈 有4個弟一固定部2〇5和4個第二固定部寫。形狀上除了第2八、 2B圖中所示固定部2G5具有1上開口以與燈管直線部尾端做彈 性卡合，^便減和更，也可使料他蚊;^彈 1274933 明並:特別限制於此。再者，熟習此技藝者當可理解第〆導電片 2〇ι"又置在第~基座202上之方法亦可使用如焊接或其他定位方 式。 第3A圖為第1A圖中第二失持部之放大示意圖。在第一實施 例中，第二失持部22亦以一第二導電片叫例如銅片）設置在以 絕緣材料形成的第二基座222上，設置方法亦可在第二導電片221 上形成螺絲孔位223，利用螺絲鎖固方式完成定位。第二導電片 221(如第3B圖所不）上係形成有複數個第三固定部226，在形狀、 位置與數目上均與該些燈管12之彎管部⑶的第三外部電極別 對應^接合。若燈f結構1G中有4支u型外部電極燈管12，則 第一‘電片221上具有4個第三固定部226。第三固定部226的形 狀上除了具有一朝右側開口以與燈管彎管部126做彈性卡合，以 方便組裝和更換燈管12外，也可使用其他狀方式，本發明並不 特別限制於此。再者，熟習此技藝者當可理解第二導電片加設 置在第一基座222上之方法亦可使用如焊接或其他定位方式。 另外，高低壓端之迴路設計可與夾持結構結合。在燈管和夾 持結構組裝完畢後，令第-夾持部2G的第一導電片2()1為高壓 側，第二夾持部22的第二導電片221為低壓側。 導電“和第二導電片221，使第一外部電極132、== P電極134和第三外部電極136導通，可使u型燈管12之第一直 線部122和第二直線部124發光。 除了上述較佳實施例所舉例之U型外部電極燈管外，熟習此 技藝者當可思及本發明之技術特徵亦可應用在任一具有彎管部之 外部電極燈管，例如帛4圖所示之左右兩側均具 燈 或是其他雜讀管。 ' 第4圖繪示本發明另一實施例之外部電極燈管之示意圖。外 1274933 極燈官32包括一第一直線部322、一第二直線部324、一第 弓e部326和一第二彎管部327。其中，第一彎管部326係分別 連接第一直線部322與第二直線部324之一端，且第一彎管部326 h 具有一第一外部電極332 ;第二彎管部327，分別連接第一直線部 322與第一直線部324之另一端，且第二彎管部327具有一第二外 口 I5電極334。應用於背光模組時，可如第ία圖所示，將多支燈管 32平打排列並以一夾持結構支持並完成導電（例如應用如第2A、 3A圖所不之導電片和固定部並與一電路線連接，使第一外部電極 332為接地電極，第二外部電極334為高壓電極）。當一電壓跨接 在第一外部電極332和第二外部電極334時，可使燈管32之第一 直線部322和第二直線部324發光。 本發明提出之外部電極燈管係將一電極形成於燈管折彎 处/、傳統將電極形成於燈管中央之一或多處相較，本發明可 增加燈官可利用之發光面積，提升燈管之發光效率。 另外’本發明之外部電極燈管組合作為顯示元件中背光模 組之光源時’可將該燈管組合設置於背光模組之殼體底部，擴散 板（其上還可放置多張擴散膜）則位於光源上方並設置在殼體的框 架處，背光模組之殼體底面可設置一反射板以將雜散光反射至顯 鲁 像出光面，提升整體光能效率。 綜上所述，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圍當視後附之申請專利範圍所界定 者為準。 11 1274933 【圖式簡單說明】 第1A圖繪示依照本發明—較佳實施例之外部 夾持結構之示意圖。 第1B圖為第1A圖中單支外部電極燈管之示意圖。 第2A圖為第1At第一夹持部之放大示意圖。 第2B圖為第2A圖中第—導電片之示意圖。 第3A圖為第1A圖中第二夾持部之放大示意圖。 第3B圖為第3A圖中第二導電片之示意圖。 第4圖繪不本發明另_實施例之外部電極燈管之示意圖 【主要元件符號說明】 10 ： 燈管組合結構 12 ： U型外部電極燈管 122 ： 燈管 12之第 一直線部 124 燈管 12之第 二直線部 126 燈管 12 管部 132 燈管 12之第 一外部電 134 燈管 12之第 二外部電 136 燈管 12之第 三外部電 20 ： 第一夾持部 201 第一 導電片 202 第一 基座 203 螺絲孔位 205 第一 固定部 206 第二 固定部 22 ： 第二夾持部 12 1274933 221 :第二導電片 222 :第二基座 223 :螺絲孔位 226 :第三固定部 32 :外部電極燈管 322 :燈管32之第一直線部 324 :燈管32之第二直線部 326 :燈管32之第一彎管部 327 :燈管32之第二彎管部 332 :燈管32之第一外部電極 334 :燈管32之第二外部電極The planarization of the light source is only required to be completed by the diffuser (and film), ie directly from directly below, 1274933 can be used without the guidance of the light guide plate, and the direct assembly has fewer assembled parts in terms of overall assembly. . The direct type backlight module comprises at least: a casing, a reflector, a light source, a diffusion plate and a plurality of diffusion films. Straight-line light sources (such as U-shaped tubes) are arranged in the casing, and the light emitted by the light source is evenly dispersed by the diffusion plate and the diffusion film to be converted into a planar light source. A reflector disposed on the bottom surface of the housing, such as a nameplate, reflects stray light to the illuminating surface to enhance overall light energy efficiency. The assembled backlight module is combined with the display unit to complete the liquid crystal display screen. The line light source used in the direct type backlight module can be divided into a long type tube and a curved outer type tube (such as a u-type tube) according to the shape, and can be classified into a cold cathode tube according to the principle of illumination (Cold) Cathode Fluorescent Lamp (CCFL) and the currently active External Electrode Fluorescent Lamp (EEFL). In the conventional backlight module, a plurality of lamps and a converter are arranged in a longitudinal arrangement in the casing. However, if the lamps are lengthened to be arranged in a lateral arrangement, the number of lamps and the number of converters can be greatly reduced. Taking a 30-inch backlight module as an example, 20 to 30 lamps are required for vertical alignment, and 12 to 16 lamps are required for lateral alignment. For backlight modules of 吋 grade, 32 lamps are arranged vertically, and are arranged horizontally. It only requires 2 〇, which can reduce the cost by about 3% in terms of the number of lamps and converters. After the tube is "long tube", it is necessary to use a circuit that can reduce the tube voltage to maintain the lamp operation and integrity (the tube will even emit a spark when the tube voltage is too high); again, there is still trouble in the support, _ Support _ and towel can be postal length m official change in the branch = two denier material level will produce leakage, temperature drop and uneven brightness. Another development trend of the chief officer of the lamp officer is to use a curved outer-letter shape (called a U-shaped electrode tube) to achieve the purpose of reducing the lamp tube. The lamp is bent into 11 in addition to the cold cathode lamp tube ( Outside CCFL), the current active development of the foot is also gradually tried _ light model money as a line source. The external sugar electrode 1274933 is formed by forming an electrode on the outside of the lamp tube, and applying a voltage across the lamp tube to cause the lamp to emit light. The electrode arrangement type is disclosed in U.S. Patent No. 6,331,064 (Nishiyama et al., Hitachi, Ltd.). The plurality of lamps are arranged in parallel, each of the tubes is sleeved with a plurality of electrode rings, and the electrode rings are longitudinally connected in series by a plurality of wires, and the ground voltage and the high voltage are supplied to the wire voltages in a staggered manner. The advantage of the external electrode tube is that it is easy to manufacture and easy to assemble, but the multiple electrodes disposed in the straight tube will reduce the light-emitting area and affect the brightness and uniformity of the tube. SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide an electrode arrangement for an external electrode tube, which can be used as a light source in a backlight module to increase the light-emitting area of the lamp. According to an object of the present invention, an external electrode tube (EEFL) is provided, comprising: a first straight portion, a second straight portion, and a first curved portion, wherein the first curved portion is connected to the first straight portion, respectively. One end of the two straight portions, and the first curved portion has a first outer electrode. In accordance with the purpose of the present invention, an assembly structure of an external electrode tube is further provided, comprising at least a plurality of external electrode tubes assembled in a parallel arrangement to a holding apparatus. Each of the external electrode tubes includes at least a first straight portion, a second straight portion and a first curved portion, and the first curved portion connects one end of the first straight portion and the second straight portion, respectively, and the first bend The tube portion has a first outer electrode. According to the purpose of the present invention, a backlight module is further provided, comprising at least: a housing having a frame; a diffusion plate disposed at the frame; and a light emitting device disposed in the housing The bottom surface is used as a light source of the backlight module. The illuminating device comprises at least: a plurality of external electrode tubes, which are mounted in a parallel arrangement group 1274493 in a holding apparatus, each of the external electrode tubes comprising at least a first straight portion, a second straight portion and a first elbow portion, the first elbow portion is connected to one end of the first straight portion and the second straight portion, respectively, and the first bent portion has a first outer electrode. According to another aspect of the present invention, a display device includes at least one display panel and a backlight module, wherein the backlight module is electrically connected to the display panel, and k is used for brightness of the display panel. The backlight module includes at least a housing having a frame, a diffusion plate disposed at the frame, and a light emitting device disposed at a bottom surface of the housing for use as a light source of the backlight module. The illuminating device comprises at least a plurality of external electrode tubes assembled in a parallel arrangement at a holding apparatus, each of the external electrode tubes comprising at least: a first straight portion, a second straight portion and a The first curved portion is connected to one end of the first straight portion and the second straight portion, and the first curved portion has a first external electrode. The external electrode tube is, for example, a U-shaped external electrode tube or other external electrode tube having at least one curved shape. The above described objects, features, and advantages of the invention will be apparent from the description and appended claims appended claims [Embodiment] The present invention provides an External Electrode Fluorescent Lamp (EEFL), which can form a lamp group for use as a line source in a Back Light Unit (BLU), wherein each lamp The tube includes at least a '^ brother' straight portion, a first portion, a straight line portion, and a first elbow portion, and the '^ elbow portion connects one end of the first straight portion and the second straight portion, respectively, and an external electrode system Formed at the first curved portion. The external electrode tube of the present invention can increase the illuminable area of the straight portion and improve the total luminous efficiency of the external electrode tube. The following is a detailed description of the invention, but the examples are not intended to limit the scope of the invention. The technique of the present invention is not limited to the modes described in the embodiments. Please refer to FIG. 1A, which is a schematic diagram of an external electrode tube and an inflammatory structure according to a preferred embodiment of the present invention. This structure can be applied to a backlight module to provide a line source. The lamp assembly structure 1 includes a plurality of U-shaped external electrode lamps assembled in a parallel arrangement to a clamping device i. Each U-shaped outer electrode tube 12, as shown in FIG. 1B, includes a first straight portion 122, a second straight portion 124, and a curved portion 126, wherein the curved portion 126 connects the first straight portion 122 with The first straight portion 124. The first straight portion 122 has a -first external electrode 132 away from one end of the curved portion (3), and the second straight portion 124 has a second external electrode 134 away from the end of the curved tube 126, and the tube portion 126 has a - In addition, the first holding portion 20 and the second holding portion 22 in the lost holding structure respectively hold the both ends of the plurality of U-shaped external electrode lamps (4). Fig. 2a is an enlarged schematic view of the first clamping portion in the first embodiment. In the first embodiment, the first clamping portion 2 is mainly disposed on the first base 202 i '6 formed of an insulating material, such as a copper sheet, and is further disposed in the first conductive sheet. A screw hole 203 is formed in the second crucible 1, and the first conductive sheet 2〇1 is positioned by the screw to fix the first base. The first conductive sheet 2〇1 (shown in FIG. 2B) is formed with a plurality of first fixing portions 2〇5 and a second fixing portion, which are in shape, position and number with the lamps 12 The first external electric (four) 2 and the second outer electrode 134 are correspondingly joined. If there are four U-shaped external electrode tubes 12 in the structure ,), the first conductive sheet is provided with four brother-fixed portions 2〇5 and four second fixed portions. In addition to the shape shown in Figures 2, 2B, the fixing portion 2G5 has an upper opening to elastically engage with the tail end of the straight portion of the tube, and the weight is reduced, and the mosquito can also be used for the mosquito; : Specially limited to this. Moreover, those skilled in the art can understand that the second conductive sheet 2〇ι" is also placed on the pedestal 202, such as soldering or other positioning methods. Fig. 3A is an enlarged schematic view of the second missing portion in Fig. 1A. In the first embodiment, the second misalignment portion 22 is also disposed on the second pedestal 222 formed of an insulating material by a second conductive sheet, such as a copper sheet. The mounting method may also be performed on the second conductive sheet 221 . The screw hole position 223 is formed, and the positioning is completed by the screw locking method. The second conductive sheet 221 (not shown in FIG. 3B) is formed with a plurality of third fixing portions 226, which are different in shape, position and number from the third external electrodes of the curved tube portions (3) of the lamps 12 Corresponding to ^ joint. If there are four u-type external electrode tubes 12 in the lamp f structure 1G, the first 'electrode 221 has four third fixing portions 226. The shape of the third fixing portion 226 has a right opening to be elastically engaged with the tube bending portion 126 to facilitate assembly and replacement of the tube 12, and other forms may be used, and the invention is not particularly limited. herein. Moreover, those skilled in the art can understand that the second conductive sheet is applied to the first base 222, such as welding or other positioning means. In addition, the circuit design of the high and low voltage ends can be combined with the clamping structure. After the lamp tube and the holding structure are assembled, the first conductive sheet 2 () 1 of the first holding portion 2G is made to be on the high pressure side, and the second conductive sheet 221 of the second holding portion 22 is made to be on the low pressure side. Conductive "and the second conductive sheet 221, the first outer electrode 132, the == P electrode 134 and the third outer electrode 136 are turned on, so that the first straight portion 122 and the second straight portion 124 of the u-shaped bulb 12 can emit light. In addition to the U-shaped external electrode tube exemplified in the above preferred embodiment, those skilled in the art can also apply the technical features of the present invention to any external electrode tube having an elbow portion, as shown in FIG. The left and right sides have lamps or other miscellaneous tubes. ' Fig. 4 is a schematic view showing an external electrode tube according to another embodiment of the present invention. The outer 1274933 pole lamp 32 includes a first straight portion 322 and a second portion. The straight portion 324, the first bow portion 326, and the second curved portion 327. The first curved portion 326 connects one end of the first straight portion 322 and the second straight portion 324, respectively, and the first curved portion 326 h has a first outer electrode 332; the second elbow portion 327 is connected to the other end of the first straight portion 322 and the first straight portion 324, respectively, and the second curved portion 327 has a second outer port I5 electrode 334. In the case of the backlight module, as shown in the figure ία, the plurality of tubes 32 are flattened. The column is supported and completed by a clamping structure (for example, the conductive sheet and the fixing portion as shown in FIGS. 2A and 3A are applied and connected to a circuit line, so that the first external electrode 332 is a ground electrode, and the second external electrode 334 is used. When a voltage is connected across the first external electrode 332 and the second external electrode 334, the first straight portion 322 and the second straight portion 324 of the bulb 32 can be illuminated. The external electrode tube proposed by the present invention The invention is characterized in that an electrode is formed at a bend of the lamp tube/the conventional electrode is formed at one or more places in the center of the lamp tube, and the invention can increase the light-emitting area available to the lamp official and improve the luminous efficiency of the lamp tube. When the external electrode tube assembly of the present invention is used as a light source of a backlight module in a display element, the lamp tube assembly can be disposed at the bottom of the housing of the backlight module, and the diffusion plate (on which a plurality of diffusion films can be placed) is located Above the light source and disposed at the frame of the casing, a reflector plate may be disposed on the bottom surface of the casing of the backlight module to reflect stray light to the illuminating surface of the illuminating image, thereby improving the overall light energy efficiency. In summary, although the present invention has been Take The preferred embodiments are disclosed above, but are not intended to limit the invention, and those skilled in the art can make various modifications and retouchings without departing from the spirit and scope of the present invention. The following is a definition of the scope of the patent application. 11 1274933 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a schematic view showing an external clamping structure in accordance with the preferred embodiment of the present invention. FIG. 1B is a diagram of FIG. 2A is an enlarged schematic view of the first clamping portion of the first Att. FIG. 2B is a schematic view of the first conductive sheet in FIG. 2A. FIG. 3A is a second clamping in the first embodiment. An enlarged view of the portion. Fig. 3B is a schematic view of the second conductive sheet in Fig. 3A. 4 is a schematic view of an external electrode lamp according to another embodiment of the present invention. [Main component symbol description] 10: Lamp assembly structure 12: U-shaped external electrode lamp 122: First straight portion 124 of the lamp tube 12 Lamp 12 second straight portion 126 lamp tube 12 tube portion 132 first external electric 134 of the tube 12 second external electric 136 of the tube 12 third external electric unit 20 of the tube 12: first clamping portion 201 first conductive Sheet 202 First base 203 Screw hole position 205 First fixing portion 206 Second fixing portion 22: Second clamping portion 12 1274933 221: Second conductive sheet 222: Second base 223: Screw hole position 226: Third The fixing portion 32: the outer electrode tube 322: the first straight portion 324 of the bulb 32: the second straight portion 326 of the bulb 32: the first elbow portion 327 of the bulb 32: the second elbow portion 332 of the bulb 32 : first external electrode 334 of the lamp tube 32: second external electrode of the lamp tube 32
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