200935487 六、發明說明： 【相關申請案之交互參照】 本申請案係基於並且主張日本專利申請案第2007-281854號 的優先權，該優先權案申請於2007年10月30日，其揭露内容^ 由參考文獻方式合併於此。 ~ 【發明所屬之技術領域】 本發明係關於一種冷陰極螢光燈。 e200935487 VI. Description of the invention: [Reciprocal Reference of Related Application] This application is based on and claims the priority of Japanese Patent Application No. 2007-281854, filed on Oct. 30, 2007, the disclosure of which ^ Incorporated by reference. BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a cold cathode fluorescent lamp. e
【先前技術】 相較於熱陰極螢光燈，冷陰極螢光燈的特徵在於：具有簡單 =電極結構，以促進燈具尺寸的縮小、免除在點亮時加熱的需求、 需要較，的功率消耗、以及防止燈絲的可能斷裂，因而使燈具延 長使用，命。因此，近年來，冷陰極螢光燈已經常被使用在例如 =晶顯示裝置(例如電視以及監視器)的背光。冷陰極螢光燈一般包 含^填有例如氬之惰性氣體以及汞氣體的玻璃管，並且包含在玻 璃管之内部兩端彼此對向配置的一對電極，以及連接至每一個 極的導線。 ％ #這些電極通常係由鎳(Ni)或鎳合金所形成。作為電極的材料通 承刼用下列組成比例：99_7 wt%的鎳、0.1 wt%的錳、(U 的鐵、 以及f.l Wt%的任何其他雜質(碳、矽、銅、硫等等）。 每一個電極被形成在圓柱體的空間内，此圓柱體的第一端具 表：，及在其第二端具有開口’此電極具有所謂杯形的 3圓柱形用以發揮衫效應’而使無關於光發射的陰 雷炻^f㈣110^ fal1 V〇kage)降低。因此’相較於棒狀以及板狀 功率消2形電極麟使發光效村麵敝善，並且大幅降低 ，柱形電極配置在比玻璃管的各内部的端 上，使得其開口彼此姉。當電壓經由導線而施加在圓極 3 200935487 碰撞而產生紫外線。紫夕ti藉内 ^圓柱形電極的表面產生碰撞，而迫使存== 表面上的錄原子離開。錄原子以此種方式被迫使開 同 時，濺射的鎳原子會圓柱形電極消耗‘ ❹ 3降低汞氣，有效量。因此，濺射:使：柱 及汞氣體耗盡。因此，鋪係減少冷陰極螢光燈工作壽 在包含圓柱形電極的冷陰極螢光財，於每 =ίΐ的?二在冷陰極螢光燈的點亮期間降錄 ί :=二人可降低圓柱形電極上之焦耳熱師㈣ 極之内表面穑卜形電極延長使用壽命。再者’於圓柱形電 f Ξϊΐίΐΐί使中空效應更有效地發揮在圓柱形電極 ^因而％夠改善冷陰極螢光燈的發光效率。因此，形成薄 柱形電極壁構件’以增加圓柱形電極的内表 壁構件通常被形成為具有至多〇.15mm的厚度。即 ❹ 期間因為可能的賤射而易於消耗之圓柱形電極的底 表面部分，實際上通常被形成為至多〇.2mm。 * 使賴作為陳形電極的材料具有低成本的優點，其適合焊 接於科伐(kova#金’此科伐合金為可用於導線的常用材料，由 ，錄在壓延加JL(r〇llmg)與抽弓j加工(廿丽㈣)方面具有高加工性 rocessability)，此可使錄輕易成形(也叩以)為圓柱體。再者，當使 S3二 1 電流的情況下時，由鎳所製造的圓柱形電極可 >然而’隨著近來液晶顯示装置的更大尺寸化螢幕以及增加的 党度’圓柱形^極已常被使用在高於7mA的管電流下 。因此，亟 而ko在此種高電流下操作的電極。假使冷陰極螢光燈被使用在 4 200935487 南於7 mA齡電流τ時，由騎製造_ _電極八 會縮短；陰流時，由鎳所製造的_電極 光燈 _ίί 二電[Prior Art] Compared to a hot cathode fluorescent lamp, a cold cathode fluorescent lamp is characterized by having a simple = electrode structure to promote the reduction of the size of the lamp, eliminating the need for heating during lighting, and requiring a relatively high power consumption. And to prevent possible breakage of the filament, thus extending the use of the lamp. Therefore, in recent years, cold cathode fluorescent lamps have been frequently used in backlights such as = crystal display devices such as televisions and monitors. The cold cathode fluorescent lamp generally comprises a glass tube filled with an inert gas such as argon and mercury gas, and includes a pair of electrodes disposed opposite each other at the inner ends of the glass tube, and a wire connected to each of the poles. % # These electrodes are usually formed of nickel (Ni) or a nickel alloy. As the material of the electrode, the following composition ratio is used: 99_7 wt% of nickel, 0.1 wt% of manganese, (U of iron, and fl Wt% of any other impurities (carbon, ruthenium, copper, sulfur, etc.). An electrode is formed in the space of the cylinder, the first end of the cylinder has a surface: and has an opening at the second end thereof. The electrode has a so-called cup-shaped 3 cylindrical shape for exerting a shirt effect. About the light emission of the yin 炻 ^ f (four) 110 ^ fal1 V〇kage) lower. Therefore, the columnar electrodes are disposed on the respective inner ends of the glass tube so that their openings are opposite to each other as compared with the rod-shaped and plate-shaped power-eliminating electrode electrodes. When a voltage is applied to a circular pole 3 200935487 via a wire, a UV light is generated. The purple ti ti borrows the surface of the cylindrical electrode to collide, forcing the recorded atom on the surface to leave. In this way, the recorded atoms are forced to open simultaneously, and the sputtered nickel atoms will consume ‘3 to reduce the mercury gas, an effective amount. Therefore, sputtering: depletion of the column and mercury gas. Therefore, the paving system reduces the working life of the cold cathode fluorescent lamp in the cold cathode fluorescent light containing the cylindrical electrode, which is recorded during the lighting of the cold cathode fluorescent lamp every ί := two people can be reduced Joule thermist on the cylindrical electrode (4) The inner surface of the pole is shaped to extend the service life. Furthermore, in the cylindrical electric field, the hollow effect is more effectively exerted on the cylindrical electrode, and thus the luminous efficiency of the cold cathode fluorescent lamp is improved. Therefore, the inner wall member which forms the thin cylindrical electrode wall member ' to increase the cylindrical electrode is usually formed to have a thickness of at most 〇15 mm. That is, the bottom surface portion of the cylindrical electrode which is easily consumed during the period due to possible sputtering is actually formed to be at most 〇2 mm. * The material used as the electrode of the Chen-shaped electrode has the advantage of low cost, and it is suitable for welding to Kovar (kova#金' this Kovar alloy is a commonly used material for wires, and is recorded in calendering plus JL (r〇llmg) It has high processing rocessability with respect to the drawing of the bow j (the beautiful (four)), which makes it easy to form a cylinder (also referred to as a cylinder). Furthermore, when S3 is used, the cylindrical electrode made of nickel can be > however, with the recent larger size of the liquid crystal display device and the increased degree of 'cylindrical electrode' Often used at tube currents above 7 mA. Therefore, ko is an electrode that operates at such high currents. If the cold cathode fluorescent lamp is used at 4 200935487 south of the 7 mA current τ, it will be shortened by riding _ _ electrode eight; when it is sinus, the _ electrode light made of nickel _ ίί
*在所^之’形電極之冷陰極螢光燈的相關技 術，係揭路在日本公開專利公報第2002_358922 2003-187740 號。 儿 乂汉弟 ⑽為Ι?ί使用_圓柱形電極，首先，_料必須被形成為 ^板。為了達到此目的’將對粉狀銦材料進行固化⑽卿 ，形，獲得的燒結體(smteredc〇mpact)進行壓延加1。然後將此材 料進行抽引加工並且成形為圓柱體。再者，綱晶體結構為面心 ^方晶格(faCe-centered cubic lattice)，以致鎳可在一般溫度下被輕 易地壓延加工。然而，鉬的晶體結構為體心立方晶格(b〇dy_centered cub1C lattice)，以致鉬難以在一般溫度下被壓延加工。為了進行壓 延加工’翻燒結體必須被加熱。 .因此’舉例而言’假使燒結體中的結晶在任何晶粒界m(crystal g^ain boundary)上係微弱結合在一起時，或者假使壓延加工期間的 溫度不夠高時，細微的龜裂會在壓延加工或抽引加工期間形成在 電極材料的表面上。相較於在其表面上不形成龜裂的圓柱形電 極，因為在其表面上形成龜裂的圓柱形電極與玻璃管内部之汞或 惰性氣體的離子具有明顯較大的碰撞面積，因此，在其表面上形 成龜裂的圓柱形電極在冷陰極螢光燈的點亮期間，會因為可能的 濺射而完全耗盡。因此，於壓延加工或抽引加工期間形成在電極 材料之表面上的細微龜裂，會導致冷陰極螢光燈縮短使用壽命。 【發明内容】 200935487 ，" 本發明之一目的為提供一種冷陰極螢光燈，即使當使用古 電流時，其亦不可能受到可能濺射所影響。 门 ❿ ，了達成此目的，本發明提供一種冷陰極螢光燈，其包含： 玻璃管’於其中至少—惰性氣體與汞氣體被充填在密封内部空問 並且於其中螢光層被形成在内壁表面上；—對圓柱形電i: ^自包含形成在第-端的底表面部分以及形成在第二端口， 這些電極被配置成其開口彼此相對；以及導線，包含連接至 面部分之外表面的第一端，以及被拉出玻璃管外部的第二 中翻或翻合金被使㈣為每__圓柱形電極的基材开; 電極的壁構件具有至少〇.23麵與至阳6 mm的H成圓柱形 明與其他目的、特徵以及優點可從參考顯示本發 明乾例之隨附圖式的以下說明而更顯明白。 【實施方式】 以下’將參考圖式來說明示範實施例。 圖1係依照示範實施例之冷陰極螢光燈的縱向剖面圖。 ㈣燈1包含··密封玻璃管2 ;破璃珠3，用以密封玻 璃吕2的相對端；成對電極單元6，在玻璃管2的内部引起放電。 冷陰極螢光燈1的玻璃管2係由矽硼玻璃所形成，而玻 ❹ 端以朗珠3純㈣。麟賴管2的材料可為錯Ϊ璃、 納玻璃、或低錯玻璃。 入螢光層(沒有顯示在圖式中)被設置在玻璃管2之内壁表面4的 ΐΪϋ形成螢光層的螢光體可例如為_酸鹽螢Ϊ體、或稀 2種螢光體的混合物。勞光體的種類可根據 令陰極螢光燈的應用或目的而選擇。 被内壁表面4所包圍之玻璃管2的内部空間5，的惰 性乳體(例如1、氤、或氖)以及預定量的采加以充填。空間5 的内部壓力被降低至約大氣壓力的數十分之一 管2内的汞係呈現為_。 目此充填在玻璃 成對電極單元6被設置在玻璃管2的相對端。每—㈣極單 6 200935487 元6包含：圓柱形電極7 ;以及導線9，連接至圓柱形電極7的底 表面部分8。電極單元6的圓柱形電極7被配置在比玻璃管2之内 部空間5的各端稍微内侧的位置上，俾能使圓柱形電極7的開口 10彼此相對而設置。每一個導線9包含：第一端，連接至圓柱形 ，極7的底表面部分8;以及第二端，穿過玻璃珠3而被拉出玻璃 官2的外部。例如科伐(k〇var)合金的導電材料被用於導線9。 圖2係依照示範實施例之冷陰極螢光燈之電極單元的立體圖。 圓柱形電極7包含圓柱形部分n，此圓柱形部分具有：縱向 第一端，被開啟作為開口 10;以及縱向第二端，被底表面部分8 ❹ 所封閉。導線9包含端面12，此端面被焊接在圓柱形電極7 表面部分8的外表面。 - 圖3係依照示範實施例之冷陰極螢光燈之圓柱形電極的縱 剖面圖。 ，吾人藉由將粉狀鉬或主要由鉬所構成的粉狀鉬合金進行固化 (soluhfymg)與成形烛叩㈣)而成為燒結體(sintered c〇mpact)，將此 ^結體進行壓延加工__而成為薄板，然、後將此薄板進行抽引 加工(drawing) ’而使圓柱形電極7形成圓柱形狀。 Λ方式形細㈣雜7:絲面部分8之壁構件的厚度 ^為0.30 mm，而圓柱形部分u之壁構件的厚度Β、外徑匚、以 ，向長度D分別為0.28 mm、2.1 mm、以及5G mm。雖缺習知 圓柱料極之壁構件的厚度通常至多為G.2 mm， ίίϊΐϊ 之圓柱形電極7的壁構件被形成為厚於習知冷 5ί先f之圓f形電極的壁構件。此係為了降低在壓延加工或 二if加諸於1目燒結體之晶粒界限(eiystal grain b_da〇〇 上的巧負载。因此，她於藉_延加工所形成之至多具有〇 2 極而言，圓柱形電極7可在壓延加工或抽引加 工期間防止細微的龜裂形成在電極材料的表面上。 撕使Λ"!類似於圓柱形電極7之處理方法卿成之圓柱形電 Ϊϋ長度與圓柱形電極7相同，以及絲面部分之壁構件 的厚度與圓柱形部分之壁構件的厚度分別為〇2職以及〇i8mj 7 200935487 的冷陰極螢紐巾，於點亮時，會發生i__(sputteri 較之下，使關姉電極7的冷陰轉光燈i在點糾可明 制濺射。由於增加圓柱形電極之壁構件的厚度而產生此種效^， 以在圓柱形電極生產過程中的壓延加卫或抽引加工_明顯 可能的細微龜裂發生在電極材料的表面上。 在圓柱形電極絲上所發生聽聽量會根據雜形電 壁構件的厚度特紐：0.23 mm而改變；當厚度小於〇.23mm時， ^數量會急遽增加；而當厚度大於〇.23麵時，此數量會大幅 ο ^ i再者’在使用具有小於〇·23麵之壁構件厚度之圓柱形電極 的冷陰極螢光燈中，於點亮時，會發生明__。然而， 至少具有〇·23 mm之壁構件厚度之圓柱形電極的冷陰極榮光 ^抑制在點亮時所發生的可能濺射。因此，㈣柱形電極之 件的厚度設定在至少0.23 mm，可在圓柱形電極生產過程中的壓 =或抽引加X綱防止可能的細微龜裂發生在雜材料的表面 將圓柱形雜之賴件的厚度設定在至少G28mm，可在壓延 =或抽引加期間進-步防止可能的細微龜裂發生在電極材料 μ^上。亦可進-步抑制在冷陰極螢光燈之點亮躺所發生的 可月&賤射。 ❹ μ ί上所述’依照不範實施例的冷陰極榮紐，圓柱形電極能 因可制麟所造成的健。因此，依躲範實施例所設 為、'令，極發光燈即使使用在大的管電流current)時，亦不易 文到可能賤射的影響。 ，於具有3.8至11.2 mm之縱長度的圓柱形電極而言，從絲 之外表面縱向延伸至離此外表面2.8 111111距離之位置的圓柱 分’谷易销可能雜的影響並且會提早耗盡。因此， 刹」電極之此部分的耗盡會對冷陰極螢光燈的卫作壽命造成不 ==響。此種問題可藉由進—步增域構件的厚度而解決，俾 ^吏圓柱形電極儘管在此部分完全耗盡的情況下亦可正確地運 8 200935487 對於八有3.8至11 ·2 mm之縱長度的圓柱形電極而+者圓 形電極之此部分(從絲_分之外表_向延Hi 2.8 mm距離的位置)的壁構件具有小於〇 離/外表面 =為可能的雜而早於其他部分耗盡。耻，聽^電^^ 冷陰轉絲的功壽命造成獨⑽彡響。另一 方面，將此Μ之壁構件的厚度設定在至少〇 28 _合 、 ο 命)。的j構件尽度設定在至少0·28 mm ’可延長冷陰極勞光燈的壽 A因依照讀實施例的冷陰極螢光燈可防止其工作壽 I，依ί—又賤射所影響之圓柱形電極的此部分而減少。因 電流時極營光燈即使當使用在大的管 ❹ 極的里產率。因而增加圓柱形電極的製造成本。 圓柱圓柱形電極之壁構件的厚度至多為〇.36麵時， 圓=ί=ϊίΐ關的可抽引性會急遽劣化’因此會大幅降低 定在至多產率。因此，由於將圓_電極的壁構件厚度設 • mm，所以可防止增加圓柱形電極的製造成本。 所以丨t於將圓柱形電極的壁構件厚度設定在至多0·32咖， 充分可抽引性。此表示圓柱 雖本發明已參考其示範實施例*被具體顯示與說明，但本 200935487 可 發明並不限於這些實施例。在此技術領域中具有通常知 解在不離開由請求項所界定之本發明之精神與範圍的^者可瞭 對這些實施例進行各種形式與細節上的變化。 〜兄下，π 【圖式簡單說明】 示範實施例之冷陰極營光燈的縱向剖_ =/冷陰極螢光燈之_單元的立: 圖 面 圖3係圖2所示之位於電極單元中之圓柱形電極的^^ ❿ 2 3 4 5 6 Ο 10 11 12 【主要元件符號說明】 冷陰極螢光燈 破璃管 破璃珠 内壁表面 内部空間 成對電極單元 圓桎形電極 底表面部分 導線 開口 圓柱形部分 端面* The related art of the cold cathode fluorescent lamp of the 'electrode' is disclosed in Japanese Laid-Open Patent Publication No. 2002-358922 2003-187740.儿 乂汉弟 (10) is Ι? ί use _ cylindrical electrode, first, _ material must be formed into a plate. In order to achieve this, the powdered indium material is cured (10), and the obtained sintered body (smteredc〇mpact) is calendered and added to 1. This material is then subjected to drawing and formed into a cylinder. Furthermore, the crystal structure is a faCe-centered cubic lattice, so that nickel can be easily calendered at a normal temperature. However, the crystal structure of molybdenum is a body-centered cubic lattice (b〇dy_centered cub1C lattice), so that molybdenum is difficult to be calendered at a normal temperature. In order to carry out the calendering process, the sintered body must be heated. Therefore, 'for example, if the crystals in the sintered body are weakly bonded together at any crystal grain boundary m, or if the temperature during the calendering process is not high enough, fine cracks will occur. It is formed on the surface of the electrode material during the calendering process or the drawing process. Compared with a cylindrical electrode which does not form a crack on its surface, since a cylindrical electrode which forms a crack on its surface has a significantly larger collision area with ions of mercury or an inert gas inside the glass tube, A cylindrical electrode whose surface is cracked may be completely depleted during the lighting of the cold cathode fluorescent lamp due to possible sputtering. Therefore, the formation of fine cracks on the surface of the electrode material during the calendering or drawing process causes the cold cathode fluorescent lamp to have a shortened service life. SUMMARY OF THE INVENTION 200935487, " It is an object of the present invention to provide a cold cathode fluorescent lamp which is unlikely to be affected by possible sputtering even when an ancient current is used. Threshold, in order to achieve the object, the present invention provides a cold cathode fluorescent lamp comprising: a glass tube 'in which at least - an inert gas and a mercury gas are filled in a sealed interior space and in which a phosphor layer is formed on the inner wall a surface; a pair of cylindrical electrodes i: ^ self-contained at a bottom surface portion formed at the first end and formed at the second port, the electrodes being configured such that their openings are opposed to each other; and a wire including a surface connected to the outer surface of the face portion The first end, and the second intermediate or overturned alloy pulled out of the glass tube are (4) opened for each __ cylindrical electrode substrate; the wall member of the electrode has at least 〇.23 face and yang of 6 mm Other objects, features, and advantages of the invention will be apparent from the following description of the accompanying drawings. [Embodiment] Hereinafter, exemplary embodiments will be described with reference to the drawings. 1 is a longitudinal cross-sectional view of a cold cathode fluorescent lamp in accordance with an exemplary embodiment. (4) The lamp 1 includes a sealing glass tube 2; a glass beads 3 for sealing the opposite ends of the glass var 2; and a pair of electrode units 6 causing discharge inside the glass tube 2. The glass tube 2 of the cold cathode fluorescent lamp 1 is formed of neodymium borosilicate glass, and the glass end is made of langzhu 3 pure (four). The material of the lining tube 2 may be a wrong glass, a nano glass, or a low-error glass. The fluorescent layer (not shown in the drawings) is disposed on the inner wall surface 4 of the glass tube 2 to form a phosphor layer. The phosphor may be, for example, a sulphate sputum or a dilute phosphor. mixture. The type of the working body can be selected according to the application or purpose of the cathode fluorescent lamp. The inert body (e.g., 氤, or 氖) of the inner space 5 of the glass tube 2 surrounded by the inner wall surface 4 and a predetermined amount are filled. The internal pressure of space 5 is reduced to about a tenth of the atmospheric pressure. Mercury in tube 2 appears as _. The glass-paired electrode unit 6 is placed at the opposite end of the glass tube 2. Each - (four) pole single 6 200935487 yuan 6 contains: a cylindrical electrode 7; and a wire 9 connected to the bottom surface portion 8 of the cylindrical electrode 7. The cylindrical electrode 7 of the electrode unit 6 is disposed slightly inward of each end of the inner space 5 of the glass tube 2, and the opening 10 of the cylindrical electrode 7 can be disposed opposite to each other. Each of the wires 9 includes a first end connected to the cylindrical shape, a bottom surface portion 8 of the pole 7, and a second end which is pulled out of the outside of the glass member 2 through the glass beads 3. A conductive material such as a k〇var alloy is used for the wire 9. 2 is a perspective view of an electrode unit of a cold cathode fluorescent lamp in accordance with an exemplary embodiment. The cylindrical electrode 7 includes a cylindrical portion n having a longitudinal first end opened as an opening 10 and a longitudinal second end closed by a bottom surface portion 8 。. The wire 9 includes an end face 12 which is welded to the outer surface of the surface portion 8 of the cylindrical electrode 7. - Figure 3 is a longitudinal cross-sectional view of a cylindrical electrode of a cold cathode fluorescent lamp in accordance with an exemplary embodiment. In the case of a powdered molybdenum or a powdered molybdenum alloy mainly composed of molybdenum, which is solidified (soluhfymg) and formed into a candlestick (4), it becomes a sintered body (sintered c〇mpact), and the composite body is subjected to calendering processing_ _ and become a thin plate, and then the sheet is subjected to drawing ', and the cylindrical electrode 7 is formed into a cylindrical shape. The shape of the crucible is fine (4) Miscellaneous 7: the thickness of the wall member of the silk portion 8 is 0.30 mm, and the thickness of the wall member of the cylindrical portion u is Β, the outer diameter 匚, and the length D is 0.28 mm, 2.1 mm, respectively. And 5G mm. Although it is known that the thickness of the wall member of the cylindrical material is usually at most G.2 mm, the wall member of the cylindrical electrode 7 is formed to be thicker than the wall member of the conventional circular f-shaped electrode. This is to reduce the grain boundary of the eiystal grain b_da〇〇 in the calendering process or the two-in-situ sintered body. Therefore, she has at most 〇2 poles formed by the processing. The cylindrical electrode 7 can prevent fine cracks from being formed on the surface of the electrode material during the calendering or drawing process. The tearing of the Λ"! is similar to the treatment of the cylindrical electrode 7 The cylindrical electrode 7 is the same, and the thickness of the wall member of the silk portion and the thickness of the wall member of the cylindrical portion are the cold cathode fluorescent towels of 〇2 and 〇i8mj 7 200935487, respectively, and i__( In the case of sputteri, the cold cathode lamp i of the anode electrode 7 is etched at a point. This effect is produced by increasing the thickness of the wall member of the cylindrical electrode to produce the cylindrical electrode. Calendering or drawing in the process _ obvious possible cracking occurs on the surface of the electrode material. The amount of hearing on the cylindrical wire is based on the thickness of the hetero-electric wall member: 0.23 mm Change; when thickness于〇.23mm, ^ the number will increase sharply; and when the thickness is greater than 〇.23 face, this number will be large ο ^ i again 'in the cold using a cylindrical electrode with a thickness of the wall member less than 〇 23 face In the cathode fluorescent lamp, when it is lit, a bright __ occurs. However, the cold cathode glory of a cylindrical electrode having a wall member thickness of at least 23 mm suppresses possible sputtering which occurs at the time of lighting. Therefore, the thickness of the (iv) cylindrical electrode is set to at least 0.23 mm, which can be used in the production process of the cylindrical electrode = or extraction plus X to prevent possible fine cracking from occurring on the surface of the miscellaneous material. The thickness of the spacer is set to be at least G28mm, and it is possible to prevent the occurrence of possible fine cracking on the electrode material μ^ during the rolling = or extraction period. It is also possible to further suppress the lighting of the cold cathode fluorescent lamp. The gradual occurrence of the lie is & 上 ' ' ' ' 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 圆柱形 圆柱形 圆柱形 圆柱形 圆柱形 圆柱形 圆柱形 圆柱形 圆柱形 圆柱形 圆柱形Set to ', let, the pole light even if used in a large tube current current) It is also not easy to influence the impact of the spurt. For a cylindrical electrode having a longitudinal length of 3.8 to 11.2 mm, the cylindrical portion extending from the outer surface of the filament to the distance from the outer surface of 2.8 111111 is The pin may have a mixed effect and will be exhausted early. Therefore, the depletion of this part of the brake electrode will cause a non-= ringing of the life of the cold cathode fluorescent lamp. This problem can be solved by The thickness of the member is solved, and the cylindrical electrode can be correctly transported even if this part is completely depleted. 200935487 For a cylindrical electrode having a longitudinal length of 3.8 to 11 · 2 mm and a circular shape The wall member of this portion of the electrode (from the position of the wire _ minute to the position of the 2.8 mm distance) has a smaller than the detachment/outer surface = a possible impurity and is depleted earlier than the other portions. Shame, listen to ^^^^ The working life of cold and negative turns causes a single (10) squeak. On the other hand, the thickness of the wall member of the crucible is set to at least 28 _ 、 、 、. The j component is set to at least 0·28 mm' to extend the life of the cold cathode lamp. Because the cold cathode fluorescent lamp according to the reading embodiment can prevent the working life I, it is affected by the ί- This portion of the cylindrical electrode is reduced. Because of the current, the camp light is used even when used in a large tube. Thus, the manufacturing cost of the cylindrical electrode is increased. When the thickness of the wall member of the cylindrical cylindrical electrode is at most 〇.36, the entanglement of the circle = ί = ϊ ΐ 遽 遽 ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ Therefore, since the thickness of the wall member of the circle_electrode is set to ?mm, the manufacturing cost of the cylindrical electrode can be prevented from increasing. Therefore, the thickness of the wall member of the cylindrical electrode is set to at most 0·32 coffee, which is sufficiently extractable. This indicates a cylinder. Although the present invention has been specifically shown and described with reference to the exemplary embodiment thereof, the present invention is not limited to these embodiments. Variations in the form and details of these embodiments can be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims. ~ Brother, π [Simple diagram of the drawing] Longitudinal section of the cold cathode camping lamp of the exemplary embodiment _ = / cold cathode fluorescent lamp _ unit of the unit: Figure 3 is the electrode unit shown in Figure 2 ^^ ❿ 2 3 4 5 6 Ο 10 11 12 of the cylindrical electrode in the middle [Description of the main components] Cold cathode fluorescent lamp broken glass tube inner wall surface internal space paired electrode unit round 电极 electrode bottom surface part wire Open cylindrical portion end face