476092 A7 _____Β7____ 五、發明說明（1 ) 〔發明所屬之技術領域〕 本發明係關於一種螢光燈，尤其是關於個人電腦，車 輛領航器等之電子機器使用之液晶顯示裝置所使用之適合 於背面光用光源之螢光燈者。 〔背景技術〕 例如在個人電腦，車輛領航器等之電子機器使用之液 晶顯示裝置中，使用螢光燈做爲從背面照射均勻光用之背 面光用光源。該種做爲背面光光源之螢光燈爲，隨著液晶 顯示裝置之顯示面積之大型化，薄型化，高性能化之要求 ，螢光燈本身也有發光管徑之小徑化，管長之長大化之同 時，在如攝氏- 4 0度乃至攝氏8 5度之廣大的周圍溫度 下或從數％至1 0 0%之光強度之控制下也仍然穩定且充 分的光強度，管軸方向均勻的發光分布等之要求。 以往，作爲該背面光用光源之螢光燈係廣泛地使用以 水銀氣體做爲放電氣體之燈，然而，具有在低周圍溫度中 之發光強度不足之缺點之同時，水銀有會產生環境污染之 可能性的關係，希望有不使用水銀氣體之螢光燈。 另一方面，在日本專利申請案特開昭 5 7 - 6 3 7 5 6號公開公報中有揭示將氖氣體，氪氣體 或氙氣體等之惰性.氣體做爲放電氣霞而使用之小型放電燈 或螢光燈。該放電燈係兩個電極、掌中，一方之電極設在玻 璃管內，而另一方之電極設在玻璃管外，且在前述玻璃管 內之電極沿著玻璃管之長度方向而設在玻璃管之略全長範 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填 一 --鲜· 經濟部智慧財產局員工消費合作社印製 -4- 476092 A7 ____B7____ 五、發明說明（2 ) 圍內之另一方面，將前述玻璃管外之電極，設在前述設在 玻璃管內之電極之前述玻璃管外周者。然後，同時有揭示 該放電燈係管倒爲2mm乃至1 Omm，管長爲5 0乃至 2 0 0 m m之小型放電燈；將直線狀或彎曲之放電燈以單 一或複數個予以組合而發光顯示文字，數字或記號等之形 式之顯示手段來使用，以及其他，當做省能量型之指示燈 或標誌燈使用之。 然而，在該構造之以往之放電燈或螢光燈中，在內部 電極之全長範圍內，難以將與外部電極之間之放電距離形 成爲一樣的距離，其結果，引起部分放電而在玻璃管全長 之範圍內無法形成穩定的陽光柱的問題發生換言之，液晶 顯示裝置中之背面光裝置用光源中，例如使用玻璃管之外 徑1 · 6mm至l〇mm程度，長度100〜500mm 程度之細長之螢光燈，而在該玻璃管內之全長範圍內，設 置電極使其放電距離爲完全一樣的狀態是在製造技術上極 爲困難的事。 又，在液晶顯示裝置中，在其使用狀態下螢光燈受到 振動之影響較多，內部電極因而局部變形的關係，難以經 常保持放電距離爲一定的距離。 :再者，在液晶顯示裝置中，將玻璃管加工成如W字管 及U字管等複雜形狀來使用，在該構_造中，在其全長範圍 內欲把內部電極形成爲其與外部、零極之間之放電距離爲同 樣的狀態是件非常困難的事。 其次，在上述構造之以往之放電燈或螢光燈中，假設 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -------------輋·！ 請先閱讀背面之注意事項再填寫: 11. 經濟部智慧財產局員工消費合作社印製 -5- 476092 / A7 B7 五、發明說明（3 ) -------------•裝--- (請先閱讀背面之注意事項再填寫inc〕 在其全長範圍內有形成放電輝光區域，然而，特別使用含 有氙之放電媒體做爲放電氣體時，在內部電極之周圍活潑 地放出電子的關係不易形成擴散陽光柱，其結果，抑制紫 外線之發生。因此，把該種電極構造使用於以激勵紫外線 之發光爲目的之螢光體塗敷在玻璃管內壁之螢光放電燈內 時，有無法得到充分明亮度之缺點存在。 因此，本發明之目的，在於解決以往之螢光燈之上述 問題點者。換言之，本發明之目的，在於提供一種含有氙 氣體之稀有氣體爲放電媒體，可以充分的明亮度實行穩定 的發光之液晶顯示裝置之背面光光源用之螢光燈者。 〔發明之揭示〕 •綉· 經濟部智慧財產局員工消費合作社印製 本發明之螢光燈之特徵係由兩端封閉成氣密狀，內部 有密封放電媒體之玻璃管，形成在該玻璃管之內壁面之螢 光體層，配置在該玻璃管內之一端部，施加一方之電位之 內部電極，及在前述玻瑭管之兩端間沿著管軸而以預定之 間距捲繞成螺旋狀之導線所成，有施加另一方之電位之外 部電極所構成者。 又，在本發明之螢光燈中，前述放電媒體係氙氣體或 氙氣體與其他的稀有氣體之混合氣體所成爲其特徵者。 再者’在本發_明之螢光燈中，霞述外部電極係與前述 玻璃管一起’該等之外周面係以.透光性之樹脂薄膜層所包 覆，因而前述外部電極爲固定在前述玻璃管之外周面成爲 一體爲其特徵者。 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公爱） -6- 476092 A7 _B7_ 五、發明說明（4 ) 又，本發明之螢光燈係具備有：其內壁面形成有螢光 體被膜，兩端形成有封閉部以便能夠密封放電媒體於其內 部之玻璃管，以氣密地貫穿該玻璃管之一方之封閉部之第 一供電用引線，延長至前述玻璃管內之該供電用引線之前 端部連接之內部電極，其一端側埋設在前述玻璃管之另一 方之封閉部內，另一端導出於前述玻璃管外之第二供電用 引線，以及在前述玻璃管之外周面沿著管軸方向捲裝爲螺 旋狀，端部爲電性連接於前述第二供電用引線之同時，機 械性固定之導電線所成之外部電極爲其特徵者。 再者，在本發明之螢光燈中，其一端被埋設在前述玻 璃管之另一方之封閉部內之第二供電用引線爲，其端部未 露出於前述玻璃管內部爲其特徵者。 再者，在本發明之螢光燈中，構成前述外部電極之導 電線之端部係捲繞安裝在前述第二供電用引線之周圍爲其 特徵者。 再者，在本發明之螢光燈中，構成前述外部電極之導 電線之端部爲，在前述第二之供電用引線之周圍，與前述 玻璃管之外周面之，構成前述外部電極之導電線之捲繞方 向相同方向捲繞安裝爲其特徵者。 再者，在本發明之螢光燈中，包含前述外部電極之玻 璃管之外周面係电透光性樹脂薄膜層_所包覆，因此，前述 外部電極固定在前述玻璃管之外埽.面成一體爲其特徵者。 再者，在本發明之螢光燈中，其一端側埋設在前述玻 璃管之另一方之封閉部內之前述第二供電用引線係在其端 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公藿） -------------輋·！ 請先閱讀背面之注意事項再填寫 tl! 經濟部智慧財產局員工消費合作社印製 476092 A7 __B7__ 五、發明說明（5 ) 部有形成扣合部爲其特徵者。 請 先 閲 讀. 背 面 之 注， 意 事 項 再 填 再者，在本發明之螢光燈中，前述放電媒體係由氙氣 體或氙氣體與其他稀有氣體之混合氣體所成爲其特徵者。 再者，在本發明之螢光燈之特徵爲，具備有：兩端形 成有封閉部之玻璃管，形成在該玻璃管之內壁面之螢光體 被膜，密封於前述玻璃管內之含有稀有氣體之放電媒體， 貫穿前述玻璃管之一方之封閉部而氣密地封閉之之第一供 電用引線，設在該第一供電用引線前端部之內部電極，其 一端側埋設在前述玻璃管之另一方之封閉部內，另一端導 出於前述玻璃管外之第二供電用引線，形成在前述玻璃管 之外周面之定位部，及由該定位部所引導，在前述玻璃管 之外周面沿著管軸方向之略全長範圍捲裝爲螺旋狀之同時 ，其一端連接固定於前述第二供電用引線之導電線所成之 外部電極者.。 再者，在本發明之螢光燈之特徵爲，包含前述外部電 極之玻璃管之外周面爲以透光性樹脂薄膜層包覆，因此前 述外部電極爲固定在前述玻璃管之外周面成爲一體者。 經濟部智慧財產局員工消費合作社印製 再者，在本發明之螢光燈中，前述放電媒體係由氙氣 體或氙氣體與其他稀有氣體之混合氣體所成爲其特徵者。 圖式之簡單說明〕 . 第1圖係顯示本發明之第一.寰施形態之螢光燈之側視 圖 第2圖係顯示第1圖所示螢光燈之縱剖視圖及附設有 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -8 - 476092 A7 B7_ 五、發明說明（6 ) 點燈電路之構成之說明圖。 --------------裝·！ (請先閱讀背面之注意事項再填寫iptc: 第3圖係將第2圖中之螢光燈之一端部予以放大而顯 示之縱剖視圖。 第4圖係顯示本發明之其他實施形態之螢光燈之縱剖 視圖。 第5圖係顯示第4圖所示螢光燈之縱剖視圖及附設有 點燈電路之構成之說明圖。 第6圖係將第5圖中之螢光燈之一端部予以放大而顯 示之縱剖視圖。 第7圖係說明對第4圖中之螢光燈捲繞外部電極用之 捲線過程用之槪略圖，其中，（a )係上視圖，（b )係 剖視圖。 第8圖係顯示以第5圖所示之點燈用電源1 8來驅動 本發明螢光燈之驅動條件之圖。 --絲- 第9圖係顯示同樣以第5圖所示之點燈用電源1 8來 驅動本發明螢光燈之驅動條件之圖。 經濟部智慧財產局員工消費合作社印製 第1 0圖係顯示第4圖所示之管電力（瓦特）與驅動 用之脈衝頻率分別取在橫軸及縱軸，求所賦予之燈管電力 中穩定地發光用之脈衝頻率區域而予以繪圖之圖表。 第1 1圖係將上述實施形態中之螢光燈之管電力之發 光強度，與以往之_水銀型及氙型之螢_光燈予以比較而顯示 之圖表。 _ 第1 2圖係顯示關於第4圖所示本發明之螢光燈，用 PWM調光方法實行亮度之調整時之，對調光訊號之能率 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -9 - 476092 A7 _______B7_ 五、發明說明（7 ) 比之相對的全光束（％)之圖表。 第1 3圖係顯示裝配本發明之螢光燈之液晶顯示裝置 用之背面光單元之構成之斜視圖。 第1 4圖係顯示本發明之其他實施形態之螢光燈之縱 剖視圖。 第1 5圖係顯不對上述構成之螢光燈，故意地施加搬 送時或處理操作時，與通常所相加同樣程度之外力之後， 施加所要之高頻電壓，分別測定玻璃管軸方向之亮度而求 其發光分布之結果之圖表。 第1 6圖係顯示本發明之再其他實施形態之螢光燈之 端部構成之縱剖視圖。 第1 7圖係顯示第二之供電用引線1 1 4 b之變形例 之圖。 〔主要元件對照表〕 11 玻璃管 12a 封閉部 12b 封閉部 13 螢光體包膜 14a 供電用引線 15 內部電極 __ 16 外部電極 ^ 17 樹脂薄膜層 14b 第2之供電用引線 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） --------------裝·！ (請先閱讀背面之注意事項再填 訂. 經濟部智慧財產局員工消費合作社印製 -10· 476092 A7 B7_ 五、發明說明（8 ) 18b 電壓供給線 19 電鍍，錫焊，壓緊 (請先閱讀背面之注意事項再填 18 點燈用電源 13 三色混合螢光體層 16b 導線之端部 71 金屬線管嘴 7 2 金屬線 8 2 陽光柱 91 穩定的發光區域 101 不穩定的發光區域 102 強度不足的發光區域 1 2 1〜1 2 4 曲線 141 導光板 1 4 2 螢光燈 143 反射器 144 擴散片材 145 反射片材 經濟部智慧財產局員工消費合作社印製 11a 定位部 171 引線本體部 172 大徑部 181 粗面部 18 2 凹凸部 183 折彎部 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -11 - 476092 ，’ A7 B7 五、發明說明（9 ) 〔發明之詳細說明〕 茲參考圖式，將本發明之實施形態詳細說明如下。 第1圖係顯示本發明之螢光燈構成之側視圖，第2圖 係顯示含有點燈電路之螢光燈構成之縱剖視圖，第3圖係 將第2圖中之螢光燈之端部予以放大而顯示之縱剖視圖。 在該圖中，本發明之螢光燈係具備有作爲發光管而發 揮功能之玻璃管1 1，該玻璃管1 1之兩端係以封閉部 1 2 a ，1 2 b氣密地封閉。該玻璃管1 1之內壁面形成 有螢光體包膜1 3。 該玻璃管1 1係例如其外徑1 · 6〜1 0 m m左右， 長度5 0〜5 0 Omm左右，在氣密地封閉之其內部空間 密封例如氙氣體之稀有氣體，或以氙氣體爲主體之混合稀 有氣體做爲放電媒體。 在玻璃管1 1之一方之封閉部1 2 a設有貫穿內部而 氣密地封閉之第一供電用引線1 4 a ，延長至氣密空間內 部之前端設有圓筒狀之內部電極1 5。該內部電極1 5係 例如用N i板形成，其內徑約爲2 · 0 m m，長度約爲 4 . 0mm之一末端部爲有底之圓筒體。又，爲了要減低 管電壓起見，在內部電極之內外壁面設放出電子性物質也 可以。在此，所謂放出電子性物質係指冷陰極螢光燈使用 之射極，例如以氧化鋇等鹼土金屬之_氧化物，硼化鑭等稀 土類元素之硼化物爲主體者。又該內部電極1 5係例如 以N i或N i合金等N i系金屬等爲材料而形成爲圓柱狀 ，平板狀，或V字狀也可以。然後，呈圓筒狀或圓柱狀時 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填 麥.1 :寫lit •μ I I MB lm^&，· AM I I ΜΗ· I I MM - 經濟部智慧財產局員工消費合作社印製 -12· 476092 ，’ A7 B7 五、發明說明（10) ，以相對於放電空間之端面被縮徑之裁頭圓錐狀體及圓錐 狀體之構成爲宜。又，內部電極之尺寸爲，通常是相應所 使用之玻璃管之內徑等而在其外徑0 · 6〜2 · 0mm左 右，長度2〜5mm左右者。 其次，第一供電用引線1 4 a係例如直徑約〇 . 4 mm之科瓦鐵鎳鈷合金及鎢所成之線狀體乃至棒狀體，·其 一端部爲銲接或壓緊於圓筒狀體之底壁面而連接，另一端 側係從玻璃管1 1之封閉部1 2 a導出外面。 又，在玻璃管1 1之外周面，涉及管軸（未圖示）方 向之略全長範圍，設有將約0 · 1mm之N i線製成之導 電線捲裝成螺旋狀而形成之外部電極1 6。該外部電極 1 6係可用直徑0 · 0 5〜0 · 5mm左右之N i線或 C u線等構成之。該外部電極1 6之材質係爲了要減低外 部電極之電力損失起見，電阻率2 X 1 0~4歐姆公分以下 者爲宜；又，其剖面形狀爲，真圓形，橢圓形，長圓形及 半圓形等之圓形狀，或三角形，四角形，矩形及梯形等之 多角形狀或該等之相似形也可以。 該外部電極1 6係沿著玻璃管1 1之管軸以預定之間 距捲繞以便沿著管軸可得到略均勻之配光分布。換言之， 外部電極之卷線間距係雖然視玻璃管之外徑（或內徑）而 定，但通常是0 ·_ 1〜1 0 m m左右相應玻璃管之位置 而變化，調整以便能夠得到預定容配光分布。例如，愈離 開內部電極，卷線間距也連續性地或階段性地變狹窄時， 向管軸方向可得到略均勻的配光特性。 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 請先閱讀背面之注意事項再填: 装 韓- 經濟部智慧財產局員工消費合作社印製 -13 - 476092 A7 ____B7_ 五、發明說明（11) 在此所謂卷線間距之連續變化者，係指相應從配置玻 瑭管內之內部電極15之一方之端部起之沿著管軸方向之 距離而連續地變化卷線間距而言。 又，所謂卷線間距之連續變化者，可舉下述的情形爲 例。換言之，將捲繞有導電線之玻璃管外壁面之部分，向 玻璃管軸方向分成兩個以上之區域，可舉出： (a )在一個區域內之卷線間距分別予以成爲均勻， 隨著遠離內部電極，按每一區域依次改變卷線間距時， (b)所鄰接之區域之端部之卷線間距作爲上限及下 限，不超過該上限及下限之範圍內連續地改變各區域間內 之卷線間距之同時，配合自內部電極之距離，任意地改變 每一區域之單位長度之平均卷線間距時， (c )各區域內之卷線間距係一定或予以徐徐地變化 ，在各區域.之境界部分急激地變化卷線間距時， (d)將上述（a) ， （b) ， （c)之兩種以上予 以組合時，等爲例。 如上述，愈遠離內部電極1 5，愈使卷線間距變狹窄 時，沿著管軸，可得到略均勻，或所希望之配光特性。 具有上述構成之外部電極1 6之外周面爲，例如以透 光性之熱收縮管等之樹脂薄膜層1 7所包覆，且固定電極 避免其向管軸方向變動。關於該樹隞薄膜層1 7，例如熱 收縮性之聚乙烯對苯二酸酯樹脂」聚亞胺樹脂及氟樹脂製 成等之管體及薄膜等，具有適當的耐熱性者爲宜。 其次，在玻璃管11之另一方之封閉部12b，設有 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） --------------装i (請先閱讀背面之注意事項再填 tl- .韓· 經濟部智慧財產局員工消費合作社印製 -14- 476092 A7 B7 五、發明說明（12) --------------裝·！ (請先閱讀背面之注意事項再填: 其一端側埋設在該封閉部1 2 b內，另一端導出於前述玻 璃管1 1外部之第二之供電用引線i 4 b。該時，引線 1 4 b係未與放電媒體接觸之。該第二之供電用引線 1 4 b係例如以外徑〇 · 1〜2 · 〇 m m左右之N i線， 科瓦鐵鎳銘合金線或杜美包銅鐵鎳合金絲（dumet wire ) 等之線材或N i或Μ 〇等之緞帶狀之箔及薄板所製成。該 第二之供電用引線1 4 b對封閉部1 2 b內之埋設爲，用 玻璃絕緣層等包覆第二之供電用引線1 4 b之表面之珠形 管座，把該管座位於玻璃管1 1之端部內，用噴燒器加熱 而封閉的方法，或在封閉前之玻璃管1 1之端部內插入第 二之供電用引線1 4 b之一端側，用噴燒器加熱玻璃管端 部而埋設等之方法可爲之。 經濟部智慧財產局員工消費合作社印製 又，構成該第二之供電用引線1 4 b之金屬線係全體 可用同材質製.成，然而，把埋設•封閉在玻璃內之部分， 及導出於封閉部外面之電壓供給線1 8 b連接之部分之材 質予以改變之構成也可以。例如，以玻璃封閉之部分爲使 用瓦鐵鎳鈷合金線或杜美包銅鐵鎳合金絲以提高與玻璃之 封接強度，而連接於電壓供給線1 8 b之部分則使用N i 線以提高焊接性等。 該第二之供電用引線1 4 b爲，在導出於玻璃管1 1 之外部之部分，有外部電極1 6以電焊，錫銲，或壓緊 19等而連接·定之。 、 其次，分別藉第一及第二之供電用引線1 4 a， 1 4 b及電壓供給線1 8 a ，1 8 b，例如從含有反相器 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -15- 476092 ，， A7 ___ B7 五、發明說明（13) (請先閱讀背面之注意事項再填 之點燈用電源1 8，對內部電極1 5及外部電極1 6施力D 預定之高頻脈衝電壓，例如20〜100kHz ，1〜4 k V之脈衝電壓。其結果，在兩電極1 5，1 6間開始放 電，在玻璃1 1內放射紫外線。如此放射之紫外線激勵玻 璃管1 1內壁面之螢光體包膜1 3，變換成可視光線而向 玻璃管1 1外放射，發揮螢光燈之功能。 具有上述構成之本發明之螢光燈爲，以配置在玻璃管 1 1之一方之端部附近之管內部之內部電極1 5，及設在 玻璃管11之外周面之外部電極16所成之簡單的電極構 造，根據氙氣體之放電之高發光強度，可發光穩定的螢光 者。 又，本發明之螢光燈中之內部電極1 5爲，在玻璃管 1 1內之端部，能夠使用相較於玻璃管1 1之全長更短， 以往之具有兩個內部電極之氙型螢光燈所使用之內部電極 略相同構造之內部電極的關係，使用以往之製造技術而可 容易地製造之。 經濟部智慧財產局員工消費合作社印製 再者，在本發明之螢光燈中之外部電極1 6爲，由熱 收縮性之樹脂薄膜層1 7包覆固定其外周面的關係，可經 常保持其間距在預定之値，因此，沿著管軸可發出均勻的 發光之同時，可確保高發光輸出。換言之，在具有上述構 成之本發明螢光燈中，有外部電極1_ 6以預定之間距，螺 旋狀捲繞在玻璃管1 1之外周面但該卷線之間距係會影 響到管軸方向之發光分布及光輸出。因此，有外部電極 1 6捲繞之玻璃管1 1之外周面係以透光性之樹脂薄膜層 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -16· 476092 ，、 A7 __ B7 五、發明說明（14) 1 7所包覆，可絕緣保護外部電極1 6之同時，螺旋狀之 卷線係緊接固定於燈泡1 1之外周面。 再者，該外部電極1 6之端部係以錫焊1 9連接於第 二之供電用引線1 4 b ，第二之供電用引線1 4 b係又其 一端側埋設在玻璃管1 1之另一方之封閉部1 2 b內的關 係’可防止外部電極16有外力施加所引起的間距之變動 ，或斷線事故等。換言之，外部電極1 6係用線直徑 0 · 5mm以下之細導電線形成的關係，其抗拉強度也有 限，對玻璃管1 1之外周面捲繞安裝時或對點燈用電源 1 8配線時，或裝配於液晶顯示裝置時以及其他的情形下 ，容易發生斷線。又，施加於外部電極1 6之外力較大時 ，會破損樹脂薄膜層1 7，使外部電極1 6發生位置偏倚 而引起間距變動之虞。然而，在本發明中，如前述，設有 第二之供電用引線1 4 b，對其連接固定外部電極1 6之 導出端之結果，可解決上述之問題，能夠得到經常能夠發 光穩定之高度光輸出之螢光燈。 第4圖乃至第6圖係顯示本發明之第二實施形態之圖 :其中，第4圖係螢光燈之側視圖，第5圖係含有點燈電 路之螢光燈之縱剖視圖，第6圖係將第5圖中之螢光燈之 一端部予以放大而顯示之縱剖視圖。在該等圖式中，與在 第1圖乃至第3圖所示之螢光燈之構_成部分實質上同樣的 構成部分則使甩同樣的元件編號」省略其詳細說明，以下 則以相異的部分爲中心來說明如下。 在本實施例中，玻璃管1 1之外徑爲3 · Omm，管 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 請先閱讀背面之注意事項再填: **-l°J· ' 經濟部智慧財產局員工消費合作社印製 -17- 476092 A7 B7 五、發明說明（15) 長爲1 76mm，其內壁形成有R，G，B之三色混合螢 光體層1 3，使用氙與氖之混合氣體作爲放電媒體。 外部電極1 6爲如在第6圖中放大而顯示，螺旋狀捲 繞於玻璃管1 1之外周面之導線之端部1 6 b係捲繞於第 二之供電用引線1 4 b之周圍，用電焊或錫焊連接之。導 線之端部1 6 b係在第二之供電用引線1 4 b之周圍，與 玻璃管11之外周面之捲繞方向相同方向捲繞之。 該外部電極1 6之安裝構造係用捲線機將構成外部電 極16之細導線以預定之間距捲繞於玻璃管11之外周面 之製造過程中有效。換言之，第7圖係顯示該捲線過程之 槪略圖，其中，圖（a )係上視圖，（b )係剖視圖。如 該圖所示，把玻璃管1 1以其管軸爲旋轉軸向箭號A方向 以定速旋轉之另一方面，向管軸方向（箭號B )以相應於 卷線間距之速度移動。然後，從配置在對玻璃管1 1直行 之方向之金屬線管嘴71供給有相加一定張力之金屬線 7 2。使用該種捲線裝置實行捲線時，卷線係從埋設在玻 璃管1 1之端部之第二之供電用引線1 4 b開始捲繞。開 始捲繞時，減慢玻璃管1 1之箭號B方向之移動速度，以 卷線間距零的狀態把金屬線捲繞在第二之供電用引線 14b之基部部分。接著，加快玻璃管1 1向箭號B方向 之移動速度，以預定之間距在玻璃管_1 1之外周面上捲繞 金屬線。該時，·在玻璃管1 1之.外周面上以預定之間距捲 繞金屬線。該時，把玻璃管1 1之箭號B方向之移動速度 向另一端部1 2 a徐徐地加快之結果，可加大卷線間距。 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） --------------荖·！ (請先閲讀背面之注意事項再填: ·- 經濟部智慧財產局員工消費合作社印製 -18 - 476092 A7 ____B7_ 五、發明說明（16) 因此，外部電極1 6之螺旋狀之卷線係從有配置玻璃管 1 1之內部電極1 5之端部1 2 a向相反之端部1 2 b以 徐徐地減少其間距之狀態捲繞之。 又，從第二之供電用引線1 4 b開始捲繞外部電極 1 6之卷線之同時，緊密聲捲繞該部分之結果可固定卷線 端部的關係，在捲繞金屬線過程中不會發生卷線之鬆弛及 位置之偏倚的關係，可以正確的間距捲繞金屬線。 再者，在捲線完成之後，因卷線端部固定於第二之供 電用引線1 4 b的關係，在配線時或裝配於液晶顯示裝置 時或搬運時也不會發生卷線之鬆弛及位置之偏倚的關係， 可以維持正確的間距。 第8圖及第9圖係顯示以第5圖所示之點燈用電源 1 8來驅動本發明螢光燈之驅動條件之圖。在氙型之螢光 燈中陽光柱容易成細條狀態（收縮性陽光柱），而該收縮 性陽光柱不規則地移動的關係，有使發光動作成爲不穩定 ，發光強度也降低的傾向。爲防止形成上述之收縮性陽光 柱起見，通常點燈用電源1 8係使用脈衝電源，有調整其 頻率之必要。 第8圖（a )係經實驗而顯示該螢光燈驅動用之脈衝 波形與螢光燈之放電電流關係的圖表。換言之，關於驅動 用脈衝波形，當使用峰値電壓1KV，脈衝電力3 · 0W ，頻率4 0 k Η- z ，能率比（D 爲45%之波形時，放 電電流波形中之放電休息期間爲7 // s e c。其結果，如 該圖（b )所示，陽光柱8 1內之收縮陽光柱部分8 2係 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） --------------穿i (請先閱讀背面之注意事項再填4|||頁 tl: 經濟部智慧財產局員工消費合作社印製 -19- 476092 ， A7 __ B7 五、發明說明（17) 到達玻璃管1 1之中央部，顯示不穩定的發光動作。 第9圖（a)係經實驗而顯示以頻率爲20kHz ， 其他條件爲同樣的脈衝波形與螢光燈之放電電流之關係之 圖表。該時之放電電流波形中放電休息期間爲1 8 #sec ，如該圖（B)所示，未形成收縮陽光柱，陽光 柱9 1向玻璃管1 1之直徑方向擴大的狀態（擴散陽光柱 )，在涉及玻璃管1 1之略全長範圍擴大，確認可得到安 定且充分強度的紫外線發光動作。 第1 0圖係將管電力（係指燈放電時供給於燈之電力 而言。其單位爲瓦特）與驅動脈衝之點燈用頻率分別取在 橫軸及縱軸，在所給之管電力中穩定發光用之點燈脈衝頻 率而繪圖之圖表。從該圖表，燈之動作狀態係可分爲穩定 的發光區域10 1 ，不穩定的發光區域102，強度不足 之發光區域.103。又，該圖（a) ( b ) (c)係顯示 當氣體壓力分別爲8·OkPa ，13·3kPa ， 18·6kPa時之放電氣體之壓力。該等之經實驗所求 得之圖表中，可明白增高氣體壓力之結果，能夠擴大穩定 的發光區域者。 第1 1圖係將上述實施形態中之螢光燈對管電力之發 光強度，與以往之水銀型及氙型之螢光燈比較而顯示之圖 表。圖中，曲線1 2 1係顯示本發明之螢光燈，曲線 1 2 2係顯示具備有兩個內部電.揮之以往之水銀型螢光燈 ，曲線1 2 3係顯示具備有兩個內部電極，以脈衝驅動之 以往之氙型螢光燈，曲線1 2 4係顯示具備有兩個內部電 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填 荖·！ tl·. 經濟部智慧財產局員工消費合作社印製 -20- 476092 ，， A7 B7 五、發明說明（18) 極，以正弦波所驅動之以往之氙型螢光燈之相對的全光通 量（％ )者。 從該圖表可明白，本發明之螢光燈之全光通量係以往 之氙型螢光燈之兩倍，與以往之水銀型螢光燈比較，也可 達到其5 0 %。 再者，本發明之螢光燈爲，其亮度從2 %至1 0 0 % 之廣範圍內調光時，具備有無閃爍之穩定的光輸出特性。 第1 3圖係顯示用PWM調光法實行亮度之調整時之，對 調光訊號之能率比之相對的全光通量（％ )之圖表。 第1 3圖係顯示裝配本發明之螢光燈之液晶顯示裝置 用之背面光單元之構成之斜視圖。該背面光單元係其尺寸 爲7英寸之液晶顯示板用之單元，在導光板1 4 1之兩側 配置上述本發明之螢光燈1 4 2各兩支。配置在導光板 1 4 1之兩側.之兩支螢光燈1 4 2係收容於分別沿著導光 板1 4 1之側面而設之反射器1 4 3內。然後，導光板 1 4 1之上面有層疊稜鏡片材及擴散片材1 4 4，下面有 層疊反射片材145。 具有上述構成之，背面光單元係其厚度爲1 1mm， 設定螢光燈之管電力爲1 1W時，背面光之亮度爲 6，OOOcd/平方公尺，得到足夠作爲車輛導航用之 顯示裝置用之背面光之亮度。 _ 第1 4圖係顯示本發明之其.他實施形態之螢光燈之縱 剖視圖，圖中，與第1圖乃至第3圖同樣部分則附以同樣 的元件編號而省略其說明。 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 請 先 閱 讀. 背 面 意 事 I 填 ¥ 經濟部智慧財產局員工消費合作社印製 -21 · 476092 A7 _B7___ 五、發明說明（19) 第1 4圖所下之螢光燈爲，在玻璃管1 1之外周面， 形成有例如槽溝或凹凸部所成之1個或複數個定位部 1 1 a ，…。卷線定位部1 1 a…係設在玻璃管1 1之外 周面上，從構成外部電極1 6之導線之開始捲繞，以及終 了之兩端部，或該等之中間位置。該等之定位部11a ， …係如前述，沿著玻璃管1 1之管軸，配合連續地或階段 性地變化之外部電極1 6之捲繞間距，連續地或保持適當 的間隔而預先形成之。然後，該等之定位部1 1 a ，…做 爲導承而實行捲線之結果，可以形成按照設計之正確間距 之卷線，可容易地實行捲線作業。 經濟部智慧財產局員工消費合作社印製 --------------麥— (請先閱讀背面之r意事項再填ΛΙ頁) 又，含有外部電極1 6之玻璃管1 1之外周面爲，如 同第一及第二之實施形態，以如熱收縮性樹脂管等之透光 性樹脂薄膜層1 7包覆，把外部電極1 6固定在玻璃管 1 1之外周面。又，外部電極1 6之導線之端部1 6 b係 捲繞於其一端側埋設在玻璃管1 1之另一方之封閉部 1 2 b內之第二之供電用引線1 4 b而連接固定之。因此 ，雖然有外力作用於外部電極1 6，但卷線之管軸方向之 移動被抑制的關係，能夠大幅度地改善玻璃管軸方向之配 光不均勻之同時，可防止光輸出之減低。 又，卷線定位部1 1 a ，…係並不限定於凹下之槽溝 狀，以玻璃等所成之凸狀，或以凹部與凸部之兩者來扣合 外部電極6也可以。又，該等之形成位置或個數也相應必 要而可選定之。 第1 5圖係顯示對上述構成之螢光燈，故意地施加搬 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -22- 476092 ,， A7 B7 五、發明說明（20) (請先閱讀背面之注意事項再填Λϋ頁) 送時或處理操作時，與通常所相加同樣程度之外力之後， 施加所要之高頻電壓，分別測定玻璃管軸方向之亮度而求 其發光分布之結果之圖表。如圖中之曲線A所示，確認在 涉及本發明之螢光燈係玻璃管全長之範圍內，呈略一樣的 發光亮度者。再者，該圖之曲線B係顯示將外部電極1 6 未經第二之供電用引線1 4 b而直接引出，又，玻璃管 1 1之外周面未形成有定位部1 1 a ，…之螢光燈施加如 同上述之外力時之配光分布以便與有關上述本發明之螢光 燈比較之。 又，第1 5圖之圖表係橫軸表示玻璃管1 1之內部電 極1 5側之自端部1 2 a之距離（公分），在縱軸則表示 亮度（cd/平方公尺）。 第1 6圖係顯示本發明之再其他實施形態之螢光燈之 端部構成之縱剖視圖。該圖中，與上述各實施形態中之螢 光燈之構成部分實質上相同之部分附以同樣的元件編號而 省略其說明。 經濟部智慧財產局員工消費合作社印製 在上述之各實施形態中，其一端側埋設在玻璃管1 1 之另一方之封閉部1 2 b內之第二之供電用引線1 4 b爲 ’如果其熱膨脹率接近於玻璃管1 1之熱膨脹率時，互相 緊密接合而強固地固定在封閉部1 2 b內。然而，兩者之 熱膨脹率相差大時，或形成封閉部1 2 b時加熱噴燒器之 缺點等時，第二之供電用引線1系b與玻璃封閉部1 2 b 之緊密接合性不足，對點燈電源配線時，搬送時或裝配螢 光燈等時，第二之供電用引線1 4 b有脫離封閉部1 2 b 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） •23- 476092 A7 _____B7___ 五、發明說明（21) 之可能性。 因此，在本實施形態中，如第1 6圖所示，於埋設在 封閉部1 2 b之第二之供電用引線1 4 b之前端部分，形 成有其直徑大於引線本體部1 7 1直徑之大徑部1 7 2。 又，第1 7圖（a )乃至（d )係顯示第二之供電用 引線1 4 b之變形例。換言之，該圖（a )所示之第二之 供電用引線1 4 b中，埋設於封閉部2 b內之端部以蝕刻 處理或電鍍處理（焊縫隆起）等而形成粗面部181;在 該圖（b )所示之第二之供電用引線1 4 b中，把前端部 分以切削及打傷等而形成凹凸部1 8 2 ;而該圖（c )所 示之第二之供電用引線1 4 b中，把前端部分予以折彎而 形成折彎部183 ;而該圖（d)所示之第二之供電用引 線1 4 b中，把前端部分予以壓偏而形成有寬幅之偏平部 1 8 4 者。 該等之第二之供電用引線1 4 b爲，在其前端部形成 有大徑部172，粗面部181，凹凸部182，折彎部 1 8 3或偏平部1 8 4等之扣合部的關係，埋設在玻璃管 1 1之封閉部1 2 b內之際，熔融之玻璃進入前端部之周 圍，當玻璃固化之後，雖然與玻璃之緊密接合爲不足，但 可防止第二之供電用引線1 4 b向軸方向脫離。 又，本發明係並非限定於上述實施之形態，在未脫離 發明之主旨之範圍內可採取各種變形。例如，玻璃管之材 質，外徑，長度，形狀，外部電極之材質，形狀，扣合手 段，內部電極之材質，形狀，配置，透光性樹脂薄膜層之 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） --------------麥— (請先閱讀背面之注意事項再填: tl_ - 經濟部智慧財產局員工消費合作社印製 -24- 476092 ，， A7 _B7_ 五、發明說明（22) 材料或氣體之種料等，對應螢光燈之用途乃至使用狀態而 可適當地變更。 -------------菜--- (請先閱讀背面之注意事項再填tml頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -25-476092 A7 _____ Β7 ____ 5. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a fluorescent lamp, especially to a liquid crystal display device used in electronic devices such as personal computers, vehicle navigators, etc., which is suitable for use on the back A fluorescent light source. [Background Art] For example, in a liquid crystal display device used in an electronic device such as a personal computer or a vehicle navigator, a fluorescent lamp is used as a light source for back light for radiating uniform light from the back. This type of fluorescent lamp used as a back light source is that as the display area of a liquid crystal display device becomes larger, thinner, and higher in performance, the fluorescent lamp itself also has a smaller diameter of the light emitting tube and a longer tube. At the same time, it is still stable and sufficient light intensity under the control of a large ambient temperature such as-40 degrees Celsius to 85 degrees Celsius or a light intensity from several% to 100%, and the tube axis direction is uniform Requirements for light distribution. Conventionally, fluorescent lamps used as the light source for the backlight have widely used lamps that use mercury gas as a discharge gas. However, they have the disadvantage of insufficient luminous intensity at low ambient temperatures, and mercury may cause environmental pollution. The possibility is related to a fluorescent lamp that does not use mercury gas. On the other hand, Japanese Patent Application Laid-Open No. 5 7-6 3 7 5 6 discloses the inertness of neon gas, krypton gas or xenon gas. Gas is a small discharge lamp or fluorescent lamp used as a discharge atmosphere. The discharge lamp has two electrodes, one of which is provided in a glass tube and the other electrode is provided outside the glass tube, and the electrode in the glass tube is provided in the glass tube along the length of the glass tube. The paper size of the full-length template is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the notes on the back before filling in one-printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs -4- 476092 A7 ____B7____ V. Description of the invention (2) On the other hand, the electrode outside the aforementioned glass tube is placed on the outer periphery of the aforementioned glass tube with the electrode disposed inside the glass tube. Then, the discharge lamp is also revealed at the same time The discharge tube is a small discharge lamp with a length of 2mm to 1mm and a tube length of 50 to 200mm; a single or multiple discharge lamps are combined to emit light and display text, numbers or symbols. It is used as a display means, and other, as an energy-saving indicator lamp or sign lamp. However, in the conventional discharge lamp or fluorescent lamp of this structure, the entire length of the internal electrode is within the range. It is difficult to form the same discharge distance between the external electrode and the electrode. As a result, the problem of causing partial discharge and failing to form a stable column of sunlight over the entire length of the glass tube occurs. In other words, a backlight device in a liquid crystal display device For the light source, for example, an elongated fluorescent lamp having an outer diameter of about 1.6 mm to 10 mm and a length of about 100 to 500 mm is used, and an electrode is arranged so that the discharge distance is within the entire length of the glass tube. Exactly the same state is extremely difficult in terms of manufacturing technology. Moreover, in the liquid crystal display device, the fluorescent lamp is affected by vibration in its use state, and the internal electrodes are locally deformed, which makes it difficult to maintain the discharge distance. It is a certain distance. In addition, in the liquid crystal display device, the glass tube is processed into a complicated shape such as a W-shaped tube and a U-shaped tube to be used. In this structure, it is intended to form an internal electrode over its entire length. It is very difficult to keep the same discharge distance from the outside and the zero pole. Second, the conventional discharge lamp with the above structure or In the light lamp, it is assumed that the paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) ------------- 輋 ·! Please read the precautions on the back before filling: 11. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -5- 476092 / A7 B7 V. Description of the Invention (3) ------------- • Installation --- (Please read the precautions on the back first Fill in inc again] A discharge glow area is formed over its entire length. However, when a discharge medium containing xenon is used as the discharge gas, the relationship between the active discharge of electrons around the internal electrode is difficult to form a diffused sunlight column. As a result, The occurrence of ultraviolet rays is suppressed. Therefore, when this type of electrode structure is used in a fluorescent discharge lamp with an inner wall of a glass tube for the purpose of exciting the luminescence of ultraviolet rays, there is a disadvantage that sufficient brightness cannot be obtained. Therefore, the object of the present invention is to solve the above problems of conventional fluorescent lamps. In other words, the object of the present invention is to provide a rare gas containing xenon gas as a discharge medium, which can realize a stable light emission with sufficient brightness. Fluorescent lamp for the back light source of the liquid crystal display device. [Disclosure of the invention] • Embroidery · The Intellectual Property Bureau of the Ministry of Economic Affairs and the Consumer Cooperatives printed the fluorescent lamp of the present invention The characteristic is that the two ends are sealed in an airtight manner, and a glass tube with a sealed discharge medium inside is formed with a phosphor layer formed on the inner wall surface of the glass tube. An electrode and a wire wound in a spiral shape along a tube axis with a predetermined distance between both ends of the glass tube, and an external electrode to which the other potential is applied. In a fluorescent lamp, the discharge medium is characterized by xenon gas or a mixed gas of xenon gas and other rare gases. Furthermore, in the fluorescent lamp of the present invention, the external electrode system and the glass tube Together, the other sides are tied. Since the translucent resin film layer is covered, the external electrode is characterized by being fixed to the outer peripheral surface of the glass tube to be integrated. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public love) -6- 476092 A7 _B7_ V. Description of the invention (4) In addition, the fluorescent lamp of the present invention is provided with: The light body film has closed portions formed at both ends so as to be able to seal the glass tube inside the discharge medium, and the first power supply lead gas-tightly penetrating through one of the closed portions of the glass tube is extended to the inside of the glass tube. One end of the internal electrode connected to the front end of the power supply lead is buried in the closed portion of the other glass tube, and the other end is a second power supply lead outside the glass tube. The coil is wound in a spiral shape in the direction of the tube axis, and the end portion is characterized by being electrically connected to the aforementioned second power supply lead, and an external electrode formed by a mechanically fixed conductive wire. Moreover, in the fluorescent lamp of the present invention, it is a feature that one end of the second power supply lead is buried in the closed portion of the other glass tube, and the end is not exposed inside the glass tube. Furthermore, in the fluorescent lamp of the present invention, it is characteristic that the ends of the lead wires constituting the external electrodes are wound around the second power supply lead. Furthermore, in the fluorescent lamp of the present invention, the ends of the conductive wires constituting the external electrodes are such that the periphery of the second power supply lead and the outer peripheral surface of the glass tube constitute the electrical conduction of the external electrodes. The winding direction of the wire is the same as its characteristic. Furthermore, in the fluorescent lamp of the present invention, the outer peripheral surface of the glass tube including the external electrode is covered with an electrically transparent resin film layer _, so that the external electrode is fixed outside the glass tube. Faces are one of them. Furthermore, in the fluorescent lamp of the present invention, the one end side of the second power supply lead buried in the closed portion of the other glass tube is at the end thereof. The paper size is applicable to the Chinese National Standard (CNS) A4 specification ( 210 X 297 males) ------------- 輋! Please read the precautions on the back before filling in tl! Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 476092 A7 __B7__ V. Description of the invention (5) The Department has a buckling unit as its feature. Please read it first. Note on the back, the matter of interest is refilled. Furthermore, in the fluorescent lamp of the present invention, the aforementioned discharge medium is characterized by a xenon gas or a mixed gas of xenon gas and other rare gases. Furthermore, the fluorescent lamp of the present invention is characterized by comprising: a glass tube having closed portions formed at both ends; a fluorescent film formed on the inner wall surface of the glass tube; and a rare gas contained in the glass tube. The gas discharge medium passes through a closed portion of one of the aforementioned glass tubes and hermetically seals the first power-supply lead, and an internal electrode provided at a front end portion of the first power-supply lead is buried at one end side of the glass tube. In the other closed portion, the other end of the second power supply lead leading out of the glass tube is formed by a positioning portion on the outer peripheral surface of the glass tube, and guided by the positioning portion, along the outer peripheral surface of the glass tube. At the same time, the coil is wound in a spiral shape in the direction of the tube axis. At the same time, one end is connected and fixed to the external electrode formed by the conductive wire of the aforementioned second power supply lead. . Furthermore, the fluorescent lamp of the present invention is characterized in that the outer peripheral surface of the glass tube including the external electrode is covered with a translucent resin film layer, so that the external electrode is fixed to the outer peripheral surface of the glass tube and integrated. By. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Furthermore, in the fluorescent lamp of the present invention, the aforementioned discharge medium is characterized by xenon gas or a mixed gas of xenon gas and other rare gases. Simple illustration of the schema]. Figure 1 shows the first of the invention. The side view of the fluorescent lamp in the shape of Huanshi. Figure 2 shows a longitudinal sectional view of the fluorescent lamp shown in Figure 1 and it is attached to this paper. It is applicable to China National Standard (CNS) A4 (210 X 297 mm) -8 -476092 A7 B7_ V. Description of the invention (6) The illustration of the structure of the lighting circuit. -------------- Installed! (Please read the precautions on the back before filling in iptc: Figure 3 is a vertical cross-sectional view showing one end of the fluorescent lamp in Figure 2 enlarged. Figure 4 shows fluorescent light in other embodiments of the present invention. A longitudinal sectional view of the lamp. Fig. 5 is a longitudinal sectional view of the fluorescent lamp shown in Fig. 4 and an explanatory diagram of a structure provided with a lighting circuit. Fig. 6 is an enlarged view of one end of the fluorescent lamp in Fig. 5 7 is a schematic diagram for explaining the winding process for winding the external electrode of the fluorescent lamp in FIG. 4, wherein (a) is a top view and (b) is a cross-sectional view. The figure shows the driving conditions for driving the fluorescent lamp of the present invention with the lighting power supply 18 shown in Figure 5.-Silk-Figure 9 shows the lighting power supply also shown in Figure 5. Figure 18 shows the driving conditions for driving the fluorescent lamp of the present invention. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. Figure 10 shows the tube power (watt) shown in Figure 4 and the pulse frequency for driving. On the horizontal axis and vertical axis, find the pulse for stable light emission in the lamp power provided. Plot the frequency region and plot it. Figure 11 shows a graph comparing the luminous intensity of the tube power of the fluorescent lamp in the above embodiment with the conventional fluorescent lamps of the mercury type and xenon type. _ Fig. 12 shows the fluorescent lamp of the present invention shown in Fig. 4. When the brightness is adjusted by the PWM dimming method, the power rate of the dimming signal is applied to this paper. The Chinese standard (CNS) A4 applies Specifications (210 X 297 mm) -9-476092 A7 _______B7_ V. Description of the invention (7) Graph of relative full beam (%). Figure 13 shows a liquid crystal display device equipped with the fluorescent lamp of the present invention. A perspective view of the structure of the back light unit used. Fig. 14 is a longitudinal sectional view showing a fluorescent lamp according to another embodiment of the present invention. Fig. 15 is a diagram showing the fluorescent lamp having the above structure when it is intentionally transported In the processing operation, after applying external force of the same degree as usual, the required high-frequency voltage is applied to measure the brightness in the axis direction of the glass tube to obtain the results of the luminous distribution. Figure 16 shows the results of the present invention. No other real A longitudinal cross-sectional view of the structure of the end portion of the fluorescent lamp in the form of construction. Figure 17 shows a second modified example of the power supply lead 1 1 4 b. [Comparative Table of Main Components] 11 Glass tube 12a Closure 12b Closure Part 13 Phosphor coating 14a Power supply lead 15 Internal electrode __ 16 External electrode ^ 17 Resin film layer 14b Second power supply lead This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) -------------- Install ... (Please read the precautions on the back before filling. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs -10 476092 A7 B7_ V. Description of the Invention (8) 18b Voltage supply line 19 Plating, soldering, and pressing (please read the precautions on the back before filling in the power supply for lighting) 13 Three-color mixed phosphor layer 16b End of the wire 71 Metal wire nozzle 7 2 Metal wire 8 2 Sunlight column 91 Stable light emitting area 101 Unstable light emitting area 102 Insufficient light emitting area 1 2 1 ~ 1 2 4 Curve 141 Light guide plate 1 4 2 Fluorescent lamp 143 Reflector 144 Diffusion sheet 145 Reflective sheet Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs Employee Consumer Cooperative 11a Positioning part 171 Lead body part 172 Large diameter part 181 Rough part 18 2 Concave part 183 Fold The paper size of the bent part is in accordance with the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -11-476092, 'A7 B7 V. Description of the invention (9) [Detailed description of the invention] The invention will be described with reference to the drawings The detailed description of the embodiment is as follows: Fig. 1 is a side view showing the structure of a fluorescent lamp of the present invention, Fig. 2 is a longitudinal sectional view showing a structure of a fluorescent lamp including a lighting circuit, and Fig. 3 is a diagram showing Fig. 2 In the figure, the fluorescent lamp of the present invention is enlarged and displayed in a longitudinal sectional view. In the figure, the fluorescent lamp of the present invention is provided with a glass tube 11 functioning as a light-emitting tube, and both ends of the glass tube 11 It is hermetically closed with the sealing portions 1 2 a and 1 2 b. A phosphor envelope 13 is formed on the inner wall surface of the glass tube 11. The glass tube 11 is, for example, its outer diameter 1 · 6 ~ 1 0 The length is about 50 mm and the length is about 50 ~ 50 mm. In the airtightly sealed interior space, a rare gas such as xenon gas, or a mixed rare gas mainly composed of xenon gas is used as the discharge medium. In glass tube 1 1 One of the closed portions 1 2 a is provided with a first power-supply lead wire 1 4 a which penetrates the inside and is hermetically closed, and is extended to a front end inside the air-tight space with a cylindrical internal electrode 15. The internal electrode 1 5 The system is formed of, for example, a Ni plate with an inner diameter of about 2.0 mm and a length of about 4. One end of 0mm is a cylindrical body with a bottom. In order to reduce the tube voltage, an electronic substance may be provided on the inner and outer wall surfaces of the internal electrode. Here, the electron-emitting substance refers to an emitter used in a cold-cathode fluorescent lamp, and for example, it is mainly composed of _ oxides of alkaline earth metals such as barium oxide and boride of rare earth elements such as lanthanum boride. The internal electrode 15 may be formed in a columnar shape, a flat plate shape, or a V shape using, for example, a Ni-based metal such as Ni or Ni alloy. Then, when it is cylindrical or cylindrical, the paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling in wheat. 1: Write lit • μ II MB lm ^ &, · AM II ΜΗ · II MM-Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -12 476092, 'A7 B7 V. Description of Invention (10), relative to The configuration of the conical body and the conical body whose diameter is reduced in the end surface of the discharge space is suitable. In addition, the size of the internal electrode is usually the outer diameter of the glass tube used, such as the outer diameter of 0. 6 to 2. 0 mm, and the length of 2 to 5 mm. Second, the first power-supply lead wire 14a is, for example, about 0. in diameter. Linear or rod-shaped bodies made of 4 mm Kovar, tungsten and tungsten. One end is connected by welding or pressing on the bottom wall of the cylindrical body, and the other end is connected from the glass tube 1 The closed portion 1 2 a of 1 leads out. In addition, the outer peripheral surface of the glass tube 11 covers a slightly full-length range in the direction of a tube axis (not shown), and is provided with an outer portion formed by winding a conductive wire made of a Ni wire of about 0.1 mm in a spiral shape. Electrode 1 6. The external electrode 16 may be formed of a Ni wire or a Cu wire having a diameter of about 0. 0-5 to 0. 5 mm. The material of the external electrode 16 is in order to reduce the power loss of the external electrode, and the resistivity is preferably less than 2 X 10 to 4 ohm centimeters; and the cross-sectional shape is true circular, oval, or oval A circular shape such as a shape and a semicircle, or a polygonal shape such as a triangle, a quadrangle, a rectangle, a trapezoid, or the like may be used. The external electrodes 16 are wound at predetermined intervals along the tube axis of the glass tube 11 so that a slightly uniform light distribution can be obtained along the tube axis. In other words, although the winding pitch of the external electrode depends on the outer diameter (or inner diameter) of the glass tube, it usually changes from 0 · -1 to 10 mm according to the position of the glass tube, and is adjusted so as to obtain a predetermined capacity. Light distribution. For example, when the distance from the internal electrode is reduced and the winding pitch is continuously or stepwise narrowed, a slightly uniform light distribution characteristic can be obtained in the direction of the tube axis. This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) Please read the notes on the back before filling: Packed in Korea-Printed by the Consumer Consumption Cooperative of the Intellectual Property Bureau of the Ministry of Economy -13-476092 A7 ____B7_ V. Description of the Invention (11) The continuous change of the winding pitch means the continuous change of the winding pitch corresponding to the distance from the end of one of the internal electrodes 15 arranged in the glass tube along the tube axis direction. In terms of. The continuous change of the winding pitch can be exemplified by the following cases. In other words, the part of the outer wall surface of the glass tube wound with the conductive wire is divided into two or more regions in the direction of the glass tube axis, and the examples are as follows: (a) The pitch of the coils in a region is made uniform, and When the distance between coils is changed away from the internal electrode in order for each region, (b) the coil interval at the end of the adjacent region is used as the upper and lower limits, and the interval between the regions is continuously changed within the range of the upper and lower limits. At the same time as the coil winding pitch, in accordance with the distance from the internal electrode, the average coil winding pitch per unit length of each area is arbitrarily changed, (c) the coil winding pitch in each area is constant or slowly changed, region. When the boundary part of the realm changes the winding line pitch sharply, (d) when two or more of the above (a), (b), (c) are combined, etc., as an example. As described above, the farther away from the internal electrode 15 is, the narrower the winding distance becomes, along the tube axis, a slightly uniform or desired light distribution characteristic can be obtained. The outer peripheral surface of the external electrode 16 having the above structure is, for example, covered with a resin film layer 17 of a light-transmissive heat-shrinkable tube, and the fixed electrode is prevented from changing in the direction of the tube axis. As for the tree shrub film layer 17, for example, a pipe body and a film made of heat-shrinkable polyethylene terephthalate resin, "polyimide resin, and a fluororesin, etc." are preferably heat-resistant. Secondly, the closed portion 12b of the other side of the glass tube 11 is provided with the paper size applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm). i (Please read the notes on the back before filling in tl-. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs -14- 476092 A7 B7 V. Description of Invention (12) (Please read the precautions on the back before filling: one end side is buried in the closed portion 1 2 b, and the other end leads out of the second power supply lead i 4 b outside the glass tube 1 1. At this time, the lead 1 4 b is not in contact with the discharge medium. The second power supply lead 1 4 b is, for example, an Ni wire with an outer diameter of about 0.1 mm to 2.0 mm, a Kovar wire, or Dumet copper It is made of wire such as iron-nickel alloy wire (dumet wire) or ribbon-shaped foil and sheet such as Ni or Mo. The second power supply lead wire 1 4 b is buried in the closed portion 1 2 b. The method is to cover the bead-shaped socket of the surface of the second power supply lead 14b with a glass insulating layer, etc., and place the socket in the end of the glass pipe 11 and close it with a burner, or One method of inserting one end of the second power supply lead wire 1 4 b into the end of the glass tube 11 before closing, and burying the end of the glass tube with a burner can be used. Printing and forming the second power supply wire 1 4 b can be made of the same material. However, it is also possible to change the structure of the material of the part buried and enclosed in the glass and the part connected to the voltage supply line 18 b led out of the closed part. For example, the part enclosed by glass is made of tile iron-nickel-cobalt alloy wire or Dumet clad copper-iron-nickel wire to improve the sealing strength with glass, and the part connected to the voltage supply line 1 8 b uses Ni wire to Improve weldability, etc. The second power-supply lead wire 1 4 b is an external electrode 16 that is connected to and fixed by an external electrode 16 that is led out of the glass tube 1 1 by welding, soldering, or pressing 19. Secondly, the first and second power supply leads 1 4 a, 1 4 b and the voltage supply lines 1 8 a, 1 8 b are respectively borrowed. For example, from the paper size containing the inverter, the Chinese National Standard (CNS) A4 is applied. Specifications (210 X 297 mm) -15- 476092, A7 ___ B7 V. Description of the invention (13) (Please read the notes on the back before filling in the power supply for lighting 18, the internal electrode 15 and the external electrode 16 Applying force D A predetermined high-frequency pulse voltage, for example, a pulse voltage of 20 to 100 kHz and 1 to 4 k V. As a result, discharge starts between the two electrodes 15 and 16 and ultraviolet rays are radiated in the glass 11. The emitted ultraviolet light excites the phosphor coating film 13 on the inner wall surface of the glass tube 11 and converts it into visible light to radiate to the outside of the glass tube 11 to exert the function of a fluorescent lamp. The fluorescent lamp of the present invention having the above-mentioned structure is The simple electrode structure is based on the internal electrode 15 arranged inside the tube near one of the ends of the glass tube 11 and the external electrode 16 provided on the outer peripheral surface of the glass tube 11. According to the discharge of xenon gas Those with high luminous intensity and stable luminescence. The internal electrode 15 in the lamp is an inner portion of the glass tube 11 which can be used shorter than the total length of the glass tube 11. The conventional xenon fluorescent lamp with two internal electrodes is used in the interior. The relationship between the internal electrodes of the electrodes with the same structure can be easily manufactured by using the previous manufacturing technology. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the external electrode 16 in the fluorescent lamp of the present invention is, The relationship between the outer peripheral surface of the heat-shrinkable resin film layer 17 is covered and fixed, and the distance between them can always be kept at a predetermined level. Therefore, while emitting light uniformly along the tube axis, high light output can be ensured. In other words, In the fluorescent lamp of the present invention having the above-mentioned structure, the external electrodes 1 to 6 are spirally wound around the outer peripheral surface of the glass tube 11 at a predetermined distance, but the distance between the winding lines will affect the light emission in the direction of the tube axis. Distribution and light output. Therefore, the outer circumference of the glass tube 11 wound with an external electrode 16 is a transparent resin film layer on the outer surface. The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm). -16 476092 ,, A7 __ B7 V. Description of the invention (14) 1 7 Wrap, can protect and protect the external electrode 16 at the same time, the spiral winding wire is fastened and fixed on the outer peripheral surface of the light bulb 11 1. Furthermore, the The end of the external electrode 16 is connected to the second power supply lead 14b by soldering 19, and the second power supply lead 14b is closed by one end being buried in the other side of the glass tube 11 The relationship within the part 1 2 b can prevent the external electrode 16 from being subject to changes in the pitch caused by the application of an external force, or a disconnection accident. In other words, the external electrode 16 is a relationship formed by a thin conductive wire having a wire diameter of 0 to 5 mm. Its tensile strength is also limited. When the glass tube 11 is wound around the outer peripheral surface of the glass tube 11 or is connected to a lighting power supply 18, or when it is mounted on a liquid crystal display device or other circumstances, disconnection is likely to occur. In addition, when the external force applied to the external electrode 16 is large, the resin film layer 17 may be damaged, the external electrode 16 may be biased, and the pitch may be changed. However, in the present invention, as described above, the second power supply lead wire 1 4 b is provided, and the lead-out end of the external electrode 16 is fixed to it, which can solve the above-mentioned problem and can obtain a height that can always stabilize light emission. Light output fluorescent lamp. 4 and 6 are diagrams showing a second embodiment of the present invention: among them, FIG. 4 is a side view of a fluorescent lamp, and FIG. 5 is a longitudinal sectional view of a fluorescent lamp including a lighting circuit, and FIG. 6 The figure is a longitudinal sectional view showing one end of the fluorescent lamp in FIG. 5 enlarged. In these drawings, the constituent elements that are substantially the same as the constituent elements of the fluorescent lamp shown in Figs. 1 to 3 are denoted by the same component numbers ", and their detailed descriptions are omitted. The different parts will be explained mainly as follows. In this example, the outer diameter of the glass tube 11 is 3 · Omm, and the paper size of the tube is in accordance with China National Standard (CNS) A4 (210 X 297 mm). Please read the precautions on the back before filling: ** -l ° J · 'Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-17- 476092 A7 B7 V. Description of the invention (15) The length is 1 76mm, and the inner wall is formed with three-color mixed fluorescent light of R, G, and B The bulk layer 1 3 uses a mixed gas of xenon and neon as a discharge medium. The external electrode 16 is shown in an enlarged view in FIG. 6. The end portion 16 b of the wire wound spirally around the outer peripheral surface of the glass tube 11 is wound around the second power supply lead 14 b. , Connect it with electric welding or soldering. The end portion 16 b of the guide wire is wound around the second power supply lead 14 b and is wound in the same direction as the winding direction of the outer peripheral surface of the glass tube 11. The mounting structure of the external electrode 16 is effective in a manufacturing process in which a thin wire constituting the external electrode 16 is wound around the outer peripheral surface of the glass tube 11 at a predetermined pitch by a winding machine. In other words, Fig. 7 shows a schematic diagram of the winding process, in which (a) is a top view and (b) is a cross-sectional view. As shown in the figure, the glass tube 11 is rotated with its tube axis in the direction of arrow A at a constant speed. On the other hand, it is moved toward the tube axis (arrow B) at a speed corresponding to the winding distance. . Then, a metal wire 72 is applied from a metal wire nozzle 71 arranged in a direction where the glass pipe 11 runs straight. When winding is performed using this type of winding device, the winding is started from the second power supply lead wire 1 4b buried in the end of the glass tube 1 1. When the winding is started, the moving speed in the direction of the arrow B of the glass tube 11 is slowed, and the metal wire is wound around the base portion of the second power supply lead wire 14b with a winding pitch of zero. Next, the moving speed of the glass tube 11 in the direction of arrow B is increased, and a metal wire is wound around the outer peripheral surface of the glass tube_1 1 at a predetermined interval. At this time, · 1 in the glass tube. The metal wire is wound at a predetermined pitch on the outer peripheral surface. At this time, as a result of slowly increasing the moving speed in the direction of the arrow B of the glass tube 1 1 toward the other end portion 12 a, the winding pitch can be increased. This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) -------------- 荖 ·! (Please read the notes on the back before filling in: ·-Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -18-476092 A7 ____B7_ V. Description of the invention (16) Therefore, the spiral coil of the external electrode 16 is from The end portion 1 2 a of the internal electrode 15 where the glass tube 1 1 is disposed is wound around the opposite end portion 1 2 b in a state where the pitch is gradually reduced. Also, starting from the second power supply lead 1 4 b At the same time that the winding of the external electrode 16 is wound, the result of tightly winding the part can fix the relationship of the end of the winding, and the relationship of slackness and positional deviation of the winding does not occur during the winding of the metal wire. The metal wire can be wound at a correct pitch. Furthermore, after the winding is completed, the end of the winding wire is fixed to the second power supply lead wire 1 4 b, and it is also used during wiring or when assembling to a liquid crystal display device or during transportation. The relationship between the slack of the winding line and the positional deviation will not occur, and the correct distance can be maintained. Figures 8 and 9 show that the lighting power supply 18 shown in Figure 5 is used to drive the fluorescent lamp of the present invention. Diagram of driving conditions. Sunlight in xenon type fluorescent lamp It is easy to form a thin strip (shrinkable sunlight column), and the relationship that the shrinkable sunlight column moves irregularly tends to make the luminous operation unstable and the luminous intensity also lowered. To prevent the formation of the shrinkable sunlight column described above Normally, the power supply for lighting 18 uses pulse power, so it is necessary to adjust its frequency. Figure 8 (a) is a graph showing the relationship between the pulse waveform of the fluorescent lamp driving and the discharge current of the fluorescent lamp through experiments. In other words, with regard to the driving pulse waveform, when the peak voltage is 1KV, the pulse power is 3 · 0W, and the frequency is 40 k Η- z, the energy ratio (D is 45%, the discharge rest period in the discharge current waveform is 7 // sec. As a result, as shown in the figure (b), the contraction of the sunlight column 8 1 in the sunlight column 8 1 is the paper size applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm)- ------------- Wear i (Please read the notes on the back before filling out 4 ||| Page tl: Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs-19- 476092, A7 __ B7 V. Description of the invention (17) Reaching the center of the glass tube 11 Unstable luminous action. Figure 9 (a) is a graph showing the relationship between the pulse waveform and the discharge current of a fluorescent lamp at a frequency of 20 kHz and other conditions under the experiment. The discharge rest in the discharge current waveform at this time The period is 1 8 #sec. As shown in the figure (B), the contracted sunlight column is not formed, and the sunlight column 91 is enlarged toward the diameter of the glass tube 11 (diffused sunlight column). The full-length range is extended, and it is confirmed that a stable and sufficient intensity of ultraviolet light emission operation can be obtained. Fig. 10 shows the tube power (referring to the power supplied to the lamp when the lamp is discharged. Its unit is Watt) and the driving pulse lighting frequency are plotted on the horizontal axis and vertical axis respectively, and the lighting pulse frequency for stable light emission in the tube power is plotted. From the chart, the operating state of the lamp can be divided into a stable light-emitting area 10 1, an unstable light-emitting area 102, and a light-emitting area with insufficient intensity. 103. The graphs (a), (b), and (c) show the pressure of the discharge gas when the gas pressures are 8 · OkPa, 13.3kPa, and 18.6kPa, respectively. These graphs obtained through experiments can clearly understand that as a result of increasing the gas pressure, a stable light-emitting area can be enlarged. Fig. 11 is a graph showing a comparison of the light emission intensity of the fluorescent lamp to the tube power in the above embodiment with conventional mercury-type and xenon-type fluorescent lamps. In the figure, the curve 1 2 1 shows the fluorescent lamp of the present invention, and the curve 1 2 2 shows that it has two internal powers. In the past, mercury-based fluorescent lamps, curve 1 2 3 series display with two internal electrodes, pulsed conventional xenon-type fluorescent lamps, curve 1 2 4 series display with two internal electronic paper sizes China National Standard (CNS) A4 Specification (210 X 297 mm) (Please read the notes on the back before filling in! Tl ·. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs -20- 476092, A7 B7 V. Description of the invention (18) The relative total luminous flux (%) of the conventional xenon fluorescent lamp driven by a sine wave. It can be understood from the graph that the total luminous flux of the fluorescent lamp of the present invention is twice that of the conventional xenon fluorescent lamp, and it can also reach 50% compared with the conventional mercury fluorescent lamp. Furthermore, the fluorescent lamp of the present invention has stable light output characteristics with or without flicker when dimming in a wide range of brightness from 2% to 100%. Figure 13 is a graph showing the relative total luminous flux (%) of the energy ratio of the dimming signal when the brightness is adjusted by the PWM dimming method. Figure 13 is a perspective view showing the structure of a back light unit for a liquid crystal display device equipped with a fluorescent lamp of the present invention. The backlight unit is a unit for a 7-inch liquid crystal display panel, and two fluorescent lamps 1 4 2 of the present invention are arranged on both sides of the light guide plate 1 4 1. It is arranged on both sides of the light guide plate 1 4 1. The two fluorescent lamps 1 4 2 are housed in reflectors 1 4 3 provided along the sides of the light guide plate 1 4 1 respectively. Then, the light guide plate 1 4 1 has a laminated cymbal sheet and a diffusion sheet 1 4 4 on the upper side, and a laminated reflective sheet 145 on the lower side. With the above structure, the back light unit has a thickness of 11 mm, and when the tube power of the fluorescent lamp is set to 1 1 W, the brightness of the back light is 6, 000 cd / m 2, which is sufficient as a display device for vehicle navigation. The brightness of the back light. _ Figure 14 shows the other aspects of the present invention. A longitudinal sectional view of a fluorescent lamp of another embodiment. In the figure, the same parts as those in Figs. 1 to 3 are attached with the same component numbers, and descriptions thereof are omitted. This paper is sized for the Chinese National Standard (CNS) A4 (210 X 297 mm). Please read it first. Note on the back I fill in ¥ Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -21 · 476092 A7 _B7___ V. Description of Invention (19) The fluorescent lamp shown in Figure 14 is outside the glass tube 11 1 For example, one or a plurality of positioning portions 1 1 a formed by a groove or an uneven portion are formed. The winding positioning portions 1 1 a ... are provided on the outer peripheral surface of the glass tube 11, and are wound from the beginning of the wires constituting the external electrode 16, and the end portions at the ends, or intermediate positions of these. Such positioning portions 11a are formed in advance along the tube axis of the glass tube 11 in accordance with the winding pitch of the external electrode 16 which is continuously or stepwisely changed continuously or at an appropriate interval. Of it. Then, as a result of carrying out the winding as a guide, the positioning portions 1 1 a, ... can form windings with a correct pitch according to the design, and can easily carry out the winding operation. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs -------------- Mai— (Please read the notice on the back before filling in ΛΙ) Also, the glass tube containing the external electrode 16 The outer peripheral surface of 11 is the same as the first and second embodiments, and is covered with a light-transmissive resin film layer 17 such as a heat-shrinkable resin tube, and the external electrode 16 is fixed to the outer periphery of the glass tube 11 surface. The end portion 16 b of the lead wire of the external electrode 16 is a second power supply lead wire 1 4 b wound around one end side of the glass tube 11 and buried in the other closed portion 1 2 b of the glass tube 1 1. Of it. Therefore, although there is an external force acting on the external electrode 16, the relationship of suppressing the movement in the tube axis direction of the winding wire can greatly improve the uneven light distribution in the axis direction of the glass tube and prevent the reduction of light output. The winding positioning portions 1 1 a,... Are not limited to the recessed groove shape, and the outer electrode 6 may be fastened with a convex shape made of glass or the like, or both of the concave portion and the convex portion. The position or number of these formations is also necessary and can be selected accordingly. Figure 15 shows the fluorescent lamp with the above structure. The paper size of the paper is intentionally applied to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -22- 476092, A7 B7. 5. Description of the invention ( 20) (Please read the precautions on the back before filling in the Λϋ page) When sending or processing, apply the required high-frequency voltage after applying the same degree of external force as usual, and measure the brightness in the direction of the axis of the glass tube. A graph of the results of its luminous distribution. As shown by the curve A in the figure, it was confirmed that the light emission brightness was slightly the same over the entire length of the glass tube of the fluorescent lamp of the present invention. In addition, the curve B in the figure shows that the external electrode 16 is directly drawn out without the second power supply lead 14b, and the positioning portion 1a is not formed on the outer peripheral surface of the glass tube 11 and so on. The light distribution of a fluorescent lamp when an external force as described above is applied is compared with the fluorescent lamp of the present invention. In the graph of FIG. 15, the horizontal axis represents the distance (cm) from the end portion 12 a of the inner electrode 15 side of the glass tube 11 and the vertical axis represents the brightness (cd / m 2). Fig. 16 is a longitudinal sectional view showing the structure of an end portion of a fluorescent lamp according to still another embodiment of the present invention. In this figure, components that are substantially the same as those of the fluorescent lamp in each of the above embodiments are given the same component numbers, and descriptions thereof are omitted. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs in each of the above embodiments, one end of the second power supply lead 1 4 b embedded in the closed portion 1 2 b of the other end of the glass tube 1 1 is' if When the thermal expansion coefficient is close to the thermal expansion coefficient of the glass tube 1 1, they are tightly bonded to each other and firmly fixed in the closed portion 1 2 b. However, when the thermal expansion coefficients of the two differ greatly, or when the burner is disadvantageous when the closed portion 1 2 b is formed, the second power supply lead 1 b and the glass closed portion 1 2 b have insufficient tightness. When wiring the lighting power supply, when transporting or installing fluorescent lamps, the second power supply lead wire 1 4 b has a detachment from the closed part 1 2 b This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (%) • 23- 476092 A7 _____B7___ 5. Possibility of invention description (21). Therefore, in this embodiment, as shown in FIG. 16, a diameter larger than the diameter of the lead body portion 1 7 1 is formed at the front end portion of the second power supply lead 1 4 b buried in the closed portion 1 2 b. The large diameter part 1 7 2. Fig. 17 (a) to (d) show modified examples of the second power supply lead wire 1 4b. In other words, in the figure (a) of the second power supply lead 1 4 b, the end portion buried in the closed portion 2 b is subjected to etching treatment or plating treatment (weld seam bulging) to form a rough surface 181; In the second power supply lead 14 b shown in the figure (b), the front end portion is cut and scratched to form a concave and convex portion 1 8 2; and the second power supply lead shown in the figure (c) is used for power supply. In the lead wire 1 4 b, the front end portion is bent to form a bent portion 183; and in the second power supply lead wire 1 4 b shown in the figure (d), the front end portion is biased to form a wide width. Of the flat part 1 8 4. These second power-supply leads 1 4 b are buckle portions having a large-diameter portion 172, a rough surface portion 181, a concave-convex portion 182, a bent portion 1 8 3, or a flat portion 1 8 4 and the like formed at the front end portion thereof. When the glass is buried in the closed portion 1 2 b of the glass tube 11, the molten glass enters the periphery of the front end portion. After the glass is solidified, although the tight connection with the glass is insufficient, it can prevent the second power supply. The lead wires 1 4 b are separated in the axial direction. The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, the material of the glass tube, outer diameter, length, shape, material, shape, fastening method, material, shape, configuration of the internal electrode, and the paper size of the transparent resin film layer are applicable to Chinese national standards (CNS ) A4 specification (210 X 297 mm) -------------- Mai — (Please read the notes on the back before filling in: tl_-Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs- 24-476092 ,, A7 _B7_ V. Description of the invention (22) Materials or gaseous seeds, etc., can be appropriately changed according to the purpose of the fluorescent lamp and the state of use. ------------- Dish --- (Please read the notes on the back before filling in the tml page) Printed on the paper by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper applies the Chinese National Standard (CNS) A4 (210 X 297 mm) -25-