201021083 六、發明說明： 【發明所屬之技術領域】 本發明涉及一種可削減水銀密封量的冷陰極放電燈 (cold cathode discharge lamp)以及使用該冷陰極放電燈 的發光裝置。 【先前技術】 先前’在液晶顯示器（liquid crystal display)所使用 的背光（backlight)模組中，使用冷陰極放電燈作為其光 源’在該冷陰極放電燈的電極中，廣泛使用著成形加工性 優異、且價格比較低的Ni材料。然而，此種冷陰極放電燈 中’在點燈時的放電過程中，經離子化的密封氣體和電極 碰撞而產生電極物質飛散的滅鑛（sputtering )現象。因此 濺鍍而飛散的電極物質和放電燈的燈管（bulb)内所密封 的水銀結合而成為合金，從而消耗水銀蒸汽使得有效水銀 量減少。其結果導致冷陰極放電燈的壽命減少。尤其，在 為了提高液晶顯示器的表面亮度而使放電燈的放電電流大 量流動來使光輸出增大時較為顯著。因此，在放電燈的燈 管内，由於補充因濺鍍所導致的水銀的減少量等原因，則 必須超過維持本來放電所需的水銀量而過多地密封著水 銀。 因此，伴隨近年來的液晶顯示器等的需求的增加，冷 陰極放電燈的出廠數量增大，從而至少在與所述水銀量的 關係方面會導致環境負荷的增大。 另一方面，為了使電極的濺鍍率降低，減少水銀的消 201021083 耗’使燈的壽命提高，而提出有一種由含有Nb或L的BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold cathode discharge lamp capable of reducing the amount of mercury seal and a light-emitting device using the cold cathode discharge lamp. [Prior Art] Previously, in a backlight module used in a liquid crystal display, a cold cathode discharge lamp was used as a light source. In the electrode of the cold cathode discharge lamp, forming processability is widely used. Excellent and relatively inexpensive Ni material. However, in such a cold cathode discharge lamp, during the discharge during lighting, the ionized sealing gas collides with the electrode to cause a sputtering phenomenon in which the electrode material is scattered. Therefore, the sputtered and scattered electrode material combines with the mercury sealed in the bulb of the discharge lamp to form an alloy, thereby consuming mercury vapor to reduce the effective mercury amount. As a result, the life of the cold cathode discharge lamp is reduced. In particular, it is remarkable when the discharge current of the discharge lamp is largely flowed to increase the light output in order to increase the surface brightness of the liquid crystal display. Therefore, in the lamp of the discharge lamp, it is necessary to excessively seal the mercury in excess of the amount of mercury required to maintain the original discharge by replenishing the amount of mercury reduction due to sputtering. Therefore, with the increase in demand for liquid crystal displays and the like in recent years, the number of shipments of cold cathode discharge lamps has increased, resulting in an increase in environmental load at least in relation to the amount of mercury. On the other hand, in order to reduce the sputtering rate of the electrode and reduce the consumption of mercury, the life of the lamp is increased, and there is a proposal to contain Nb or L.
Ni合金來形成電極的放電燈（參照專利文獻1)。 ' [專利文獻丨]曰本專利特開2004-235073號公報 / 然而，專敎獻1所示的放電燈，軸可以使激鑛率 降低，但是會因濺鍍而產生飛散的電極物質，所以因誃電 鋪質而導致水銀受到消耗，從而相應地必須過多地^封 著水銀。 ^ 【發明内容】 本發明是鑒於所述問題而開發的，其目的在於提供一 2使因濺鑛所導致的水銀的消耗受到抑制，削減密封ς燈 s内的水銀# ’㈣可減姆境負荷的冷陰極放電燈以及 使用該冷陰極放電燈的發光裝置。 技術方案1所揭示的冷陰極放電燈的特徵在於包括： f光性的氣密燈管，在内部密封著稀有氣體以及水銀，且 在内周面上形成著螢光體層，·筒狀電極，在該氣密燈管的 ㈣部相對向㈣裝著—對，以-端側為開口部而以另一 端側為底端部，從所述開口部朝向底端部的軸方向的長度 尺寸為13 mm或13 mm以上，長度尺寸相對於外徑尺寸 =比為4或4以上，且由Ni或Ni合金所形成；以及電極 線接合在該涛狀電極的所述底端部而進行供電。氣密 燈管可應用直線狀、U字狀、L字狀或、，，字狀等的形 狀的燈管，其形狀並未作特別限定。 技街方案2所揭示的發光裝置的特徵在於包栝：裝置 體，以及技術方案1所揭示的冷陰極放電燈，安裝在該 5 201021083 裝置本體上。發光裝置的概念是包含顯示器裝置或所謂的 照亮空間的照明器具。 ° 【發明的效果】 根據技術方案1所揭示的發明，可提供一種抑制因減 鍵所導致的水銀的消耗、削減密封於燈管内的水銀量而可 減輕環境負荷的冷陰極放電燈。 根據技術方案2所揭示的發明，可提供一種發揮技術 方案1所揭示的冷陰極放電燈的效果的發光裝置。 為讓本發明之上述和其他目的、特徵和優點能更明顯 易僅，下文特舉較佳實施例，並配合所附圖式，作詳細說 明如下。 β 【實施方式】 以下，參照圖1至圖3之（a)、圖3之（b)、圖3之 (c)對本發明的實施方式的冷陰極放電燈進行說明。此 外，在各圖中對相同部分附上相同符號，並省略重複的說 明。圖1是表示冷陰極放電燈的截面圖，圖2以及圖3之 (2圖己之⑴、圖3之(。）是表示用來說明所述本實 施方式的示意性的截面圖。 =B月首先，對成為本實施方式的前提的冷陰極放電燈進行 =二1所示，冷陰極放電燈1包括作為透光性的氣 哲二、玻璃燈管2以及電極單元3。玻璃燈管2由半硬 I暂3形成。此外’並不限找半硬質玻璃，也可應用 该笼4、軟質玻璃等，此外’可應用聲魏玻璃、納玻 璃的組成’也未作特別限定。當將該冷陰極放電 201021083 燈i用作液晶面板的背光模組的光源時，對於破璃燈管2 的外徑的種類而言，於p 1.5 mm〜p5.〇mm的範圍内準備 數種’並根據液晶面板的規格而區分使用。而且，準備長 • 度也為150 mm〜1300 mm左右的燈管，其尺寸有細徑化、 長條化的傾向。玻璃燈管2的兩端被封閉而在内部形成著 密閉空間，並密封著Ar、Xe、Ne等的稀有氣體以及水銀 蒸Η。此外’在玻璃燈管2的内周面上形成著榮光體層的 螢光膜4。螢光膜4可應用鹵磷酸鹽螢光體或稀土類金屬 _ 氧化物螢光體等。 電極單元3包括筒狀電極5、以及用以對該筒狀電極5 進行供電而接合的電極導線6。電極5具有比玻璃燈管2 的内徑略小的外徑，且是以一端側為開口部5a而以另一端 侧為底端部5b的杯狀，以如此方式形成為杯狀，則可利用 空心陰極效應（hollow-cathode effect)而使陰極下降電壓 降低。此外，電極5由Ni或Ni合金所形成，且是通過對 板材進行加壓（press)加工或對線材進行冷锻（c〇id ❿ forging)加工而形成。 電極導線6由封接構件6a和導引構件6b所構成，封 接構件6a的前端側通過雷射光束（laser beam)焊接等而 接合在電極5的底端部5b。此外，封接構件6a和導引構 件6b通過熔接而接合著。封接構件6a使用Kov (科伐） 線，導引構件6b使用由銅包覆錄鐵合金的周圍的杜美 (dumet)線。 以如此方式構成的電極單元3在玻璃燈管2的兩端部 201021083 封裝著-對’使杯狀的電極5的開口部5a互相對向而配 置，從玻璃燈管2的兩端部導出電極導線6。此外，當向 玻璃燈管2封裝電極單元3時，在封裝之前將玻璃珠(一 bead) 7熔接在封接構件6aJl。而且，當將電極單元3接 。在玻璃燈管2上時’對玻璃珠7和玻璃燈管2的端部進 行熔融封接。 其次，本發明者為了削減密封在冷陰極放電燈1的玻 璃燈管2内的水銀量，而進行了如下實驗、測定，並嘗試 進行調查分析。 (實測例1)對冷陰極放電燈1的初始品、及點燈規 定時間且經過壽命測試後的壽命測試經過品的密封水銀量 進行測定。此外’對於壽命測試經過品，為了把握水銀是 在哪個部位產生消耗，而對每個部位上的水銀的附著量進 行測定。其結果如下表所示。 [表1] ------ 水銀量（mg) 部位 測定品 全體 電極 部 燈管黑化 部 無黑化的螢 光體層部 合 計 3.9 初始品 3.9 _ • 壽命測試經過 品 • 0.04 2.9 0.8 3.75 此處，初始品的水銀密封量為3.9 mg。所謂的部位上 的“燈管黑化部”是指如圖2所示，壽命測試經過品中的 201021083 一對電極5的開口部5a附近所產生的玻璃燈管2的内表面 的黑化部Bk。此外’所謂“無黑化的螢光體層部”主要是 指除黑化部Bk以外的玻璃燈管2的内表面的螢光體層 . 部。根據該結果而判斷出所密封的水銀集中在燈管黑化部A discharge lamp in which an electrode is formed of a Ni alloy (see Patent Document 1). [Patent Document No. 2004-235073] However, in the discharge lamp shown in Fig. 1, the shaft can reduce the rate of the ore, but the scattered electrode material is generated by sputtering. Mercury is consumed due to the electrical quality of the enamel, and accordingly mercury must be sealed too much. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a method for suppressing consumption of mercury caused by splashing, and reducing mercury in a sealed xenon lamp s. A loaded cold cathode discharge lamp and a light-emitting device using the same. The cold cathode discharge lamp disclosed in claim 1 is characterized in that it comprises: a light-tight gas-tight lamp tube in which a rare gas and mercury are sealed inside, and a phosphor layer is formed on the inner peripheral surface, and a cylindrical electrode is formed. The (fourth) portion of the hermetic tube is mounted oppositely (four), and the end portion is the opening portion and the other end portion is the bottom end portion, and the length dimension from the opening portion toward the bottom end portion in the axial direction is 13 mm or more, the length dimension is 4 or more with respect to the outer diameter dimension, and is formed of Ni or a Ni alloy; and the electrode wire is joined to the bottom end portion of the turbine electrode to supply power. The gas-tight bulb can be applied to a lamp having a linear shape, a U shape, an L shape, or a shape of a letter, and the shape thereof is not particularly limited. The illuminating device disclosed in the technique 2 is characterized in that the device body and the cold cathode discharge lamp disclosed in claim 1 are mounted on the device body of the 5 201021083. The concept of a lighting device is a lighting device comprising a display device or a so-called illuminating space. [Effect of the Invention] According to the invention disclosed in claim 1, it is possible to provide a cold cathode discharge lamp capable of reducing the environmental load by suppressing the consumption of mercury due to the reduction of the bond and reducing the amount of mercury sealed in the bulb. According to the invention disclosed in claim 2, a light-emitting device which exhibits the effects of the cold cathode discharge lamp disclosed in claim 1 can be provided. The above and other objects, features, and advantages of the present invention will be apparent from the description of the appended claims. [Embodiment] Hereinafter, a cold cathode discharge lamp according to an embodiment of the present invention will be described with reference to Figs. 1 to 3(a), Fig. 3(b), and Fig. 3(c). In the drawings, the same portions are denoted by the same reference numerals, and the repeated description is omitted. Fig. 1 is a cross-sectional view showing a cold cathode discharge lamp, and Fig. 2 and Fig. 3 (Fig. 2 (1) and Fig. 3 are schematic cross-sectional views for explaining the present embodiment. First, the cold cathode discharge lamp which is the premise of the present embodiment is shown as =2, and the cold cathode discharge lamp 1 includes a gas-transmissive gas cylinder 2, a glass bulb 2, and an electrode unit 3. The glass bulb 2 is composed of The semi-hard I is temporarily formed. In addition, it is not limited to semi-hard glass, and the cage 4, soft glass, etc. can also be used, and the composition of the "applicable wei glass, nano glass" is also not particularly limited. Cold cathode discharge 201021083 When the lamp i is used as the light source of the backlight module of the liquid crystal panel, for the type of the outer diameter of the glass bulb 2, several kinds are prepared in the range of p 1.5 mm to p5.〇mm. The size of the liquid crystal panel is used separately. Moreover, the length of the lamp is about 150 mm to 1300 mm, and the size of the lamp is narrow and long. The both ends of the glass tube 2 are closed. The inside forms a closed space and seals the rare gases of Ar, Xe, Ne, etc. In addition, a fluorescent film 4 having a glomerium layer is formed on the inner peripheral surface of the glass bulb 2. The phosphor film 4 can be a halogen phosphate phosphor or a rare earth metal oxide oxide. The electrode unit 3 includes a cylindrical electrode 5 and an electrode lead 6 for bonding the power supply to the cylindrical electrode 5. The electrode 5 has an outer diameter slightly smaller than the inner diameter of the glass bulb 2, and is an end side In the cup shape in which the opening portion 5a is the bottom end portion 5b and the other end side is formed in a cup shape in this manner, the cathode lowering voltage can be lowered by the hollow-cathode effect. Further, the electrode 5 is made of Ni. Or formed by a Ni alloy, and formed by press processing a plate material or cold forging (c〇id ❿ forging) processing of the wire material. The electrode wire 6 is composed of a sealing member 6a and a guiding member 6b. The front end side of the sealing member 6a is joined to the bottom end portion 5b of the electrode 5 by laser beam welding or the like. Further, the sealing member 6a and the guiding member 6b are joined by welding. The sealing member 6a Using the Kov line, the guide member 6b is used by The dumet wire around the ferroalloy is coated. The electrode unit 3 configured in this manner is packaged at both end portions 201021083 of the glass bulb 2 to face each other with the opening 5a of the cup-shaped electrode 5 facing each other. In the arrangement, the electrode lead 6 is led out from both end portions of the glass bulb 2. Further, when the electrode unit 3 is packaged to the glass bulb 2, a glass bead 7 is welded to the sealing member 6aJ1 before packaging. When the electrode unit 3 is connected, the end of the glass bead 7 and the glass bulb 2 is melt-sealed when it is on the glass bulb 2. Next, the inventors cut the glass lamp sealed in the cold cathode discharge lamp 1 The amount of mercury in the tube 2 was tested and measured as follows, and an investigation and analysis was attempted. (Measurement Example 1) The amount of sealed mercury in the initial product of the cold cathode discharge lamp 1 and the life test after passing the life test was measured. In addition, in the life test product, in order to grasp where the mercury is consumed, the amount of mercury attached to each part is measured. The results are shown in the table below. [Table 1] ------ Mercury amount (mg) Part measurement product All electrode part Lamp blackening part No blackened phosphor layer total 3.9 Initial product 3.9 _ • Life test pass product • 0.04 2.9 0.8 3.75 Here, the initial product has a mercury seal of 3.9 mg. The "light tube blackening portion" in the portion refers to the blackening portion of the inner surface of the glass bulb 2 which is generated in the vicinity of the opening portion 5a of the pair of electrodes 5 in 201021083 in the life test product shown in Fig. 2 . Bk. Further, the term "the blackened phosphor layer portion" mainly means a phosphor layer on the inner surface of the glass bulb 2 other than the blackened portion Bk. According to the result, it is judged that the sealed mercury is concentrated in the lamp blackening portion.
Bk中。進而’對該黑化部Bk進行分析的結果，從黑化部 Bk中檢測出與電極5的材料相同的元素，這是在點燈時的 放電過程中電極5被濺鍍而飛散的電極物質。此外，可確 認出所滅鑛的電極物質是以微細的分子狀態而飛散，因此 ® 具有活性而與水銀蒸汽反應並作為蒸汽壓較低的化合物而 附著在黑化部Bk上。 因此，如果可以防止或抑制該所濺鍍的電極物質與水 銀的反應，則認為可削減初始的水銀密封量。另外，通過 用X射線拍攝來觀察筒狀電極5的哪個部位被錢錄，可判 斷出内周面的底端部5b附近的部分St已被選擇性地藏鑛。 (實測例2)其次’如圖3之（a)、圖3之（b)、圖3 之（c)所示’具體而言，作為電極而準備外徑尺寸p21 • mm、壁厚尺寸t〇.l mm、開口部5a至底端部5b的軸方向 的長度尺寸1^1 = 5 111111(圖3之（&))、1^2 = 7111111(圖3之 (b))、L3=10 mm (圖3之（c))的由Ni形成的三種筒 狀電極5 ’將外徑尺寸〇·8 mm、長度尺寸4 mm的Kov線 的封接構件6a接合在該筒狀電極5上而構成電極單元3。 將這些電極單元3封裝在外徑尺寸3.4 mm、長度尺寸1〇〇〇 mm的玻璃燈管2的兩端部，且將6><1031^的1^_入1·作為 稀有氣體、及3.9 mg水銀密封於玻璃燈管2的内部而製作 9 201021083 冷陰極放電燈1。而且，將這些冷陰極放電燈1以燈電流 10mA來點燈6000小時，進行外觀觀察以及燈管内密封水 銀的分析的結果是如下表所示β在本實測中，首先，對筒 狀電極5的長度尺寸為LpSmm (圖3之（a))和L2=7 mm (圖3之（b))的燈進行測定分析，根據其結果對長 度尺寸為L3= 10 mm (圖3之（c))的燈進行測定分析。 [表2] ρς—----- 水銀量（mg) 部位 電極 燈管黑化 無黑化的螢光體 _電極長度尺寸 部 部 層部 合計 ^___ — L] = 5 mm 0.02 3.2 0.6 3.82 ._ L2=7 mm 0.04 2.9 0.8 3 75 —L3=10 mm 0.04 0.04 _ —丨 3.6 3.68 — 此處 合哔位的取樣為如下：在與玻璃燈管2的兩 的封閉部相距5 mm的位置P1處將玻璃燈管2切斷 電極5而作為《電極部》，並且在與封閉部 :;置尸處將玻璃燈管2切斷，將此部分作為“燈Γ4 ‘無璃燈管2的部分料 如圖3之（a)以及圖3之、 一 :二度尺寸為^一一一:中在產筒二 不變’筒狀電極5的内周面的底端部％附近的^分 201021083 st被選擇性地濺鍍。此外，獲得如下結果：電極5的長度 尺寸為= 5 mm的燈和乙2 = 7 mm的燈中，電極5的開口 部5a附近所產生的玻璃燈管2的内表面的黑化部Bk的長 度尺寸不同，Ι^ = 5ιηιη的燈中約為3mm，L2 = 7mm的燈 中約為1mm，1^ = 5 mm的燈較長，電極5的長度尺寸與 黑化部Bk的長度尺寸之和為約8mm而成為相同。進而， 得知與所述實測例1相同，所密封的水銀集中在燈管黑化 部Bk。因此，根據所述的這些内容中電極$的產生賤鑛的 位置相同，且電極5的飛散物質的飛散位置相同，而判斷 為電極5的飛散物質是從產生濺鍍的位置物理性地飛來， 從而認為只要使筒狀電極5的長度尺寸變長，將電極5的 飛散物質收納在電極5的内周部，則飛散物質就不會和水 銀結合而形成化合物。 根據上述知識見解，如圖3之（c)所示，在筒狀電極 5的長度尺寸為L3=10mm的燈中，認為電極5的飛散物 質容納在電極5的内周部，在玻璃燈管2的“燈管黑化部” 八處未觀察到黑化，也幾乎未檢測出水銀。 (實測例3)省略圖示，改變筒狀電極5的尺寸等的 條件而進行與實測例2相同的測定。準備外徑尺寸φ2.7 mm、壁厚尺寸t〇 1 mm、長度尺寸l1==5 mm、L2 = 7 mm、 L3==l〇mm、L4=15mm的由Ni合金所形成的4種筒狀電 極5 ’將外徑尺寸0·8 mm、長度尺寸4 mm的Kov線的封 接構件6a接合在該筒狀電極5上而構成電極單元3。將這 二電極單元3封裝在外徑尺寸3.4 mm、長度尺寸1000 11 201021083 的玻璃燈管2的兩端部’且將6xl03Pa的Ne-Ar作為稀有 氣體、及3.9 mg水銀密封於玻璃燈管2的内部而製作冷陰 極放電燈1。而且，將這些冷陰極放電燈1以燈電流13 mA 來點燈6000小時，進行外觀觀察以及燈管内密封水銀的分 析的結果是如下表所不。 [表3] 水銀量（mg) 部位 電極長度尺 電極部 燈管黑化 部 無黑化的螢光體 層部 合計 Li = 5 mm 0.02 3.2 ~ 11 一 — 0.6 3.82 3.75 •Λ λ r\ L2=7 mm 0.04 2.9 ------ 0.8 Ί L3=10 mm 0.04 0.04 —— 3.6 L4=15 mm 0.04 0.04 "" ------- 3.7 3.68 "------ 3.78 -—— _ ❹ 根據本實測例得知，在電極5的長度尺寸為l = mm、L2 = 7 mm的燈中產生玻璃燈管2的黑化，電極 開口部5a附近所產生的玻璃燈管2的内表 ' 尺寸在τ在電極5的長度尺寸為 為3 mm，在1^7_的燈中約為lmm，電极 尺寸與黑化部Bk的長度尺寸之和為約8麵的長度 此外，得知__水雜巾在奸黑麟=為相一= 面，在電極5的長度尺寸為L3==1〇 mm、 为一方 中未觀察到麵燈管_化。㈣，當試著調 12 201021083 的内周部時，雖然附著有電極5的飛散物質，但是在這些 飛散物質中幾乎未能檢測出水銀。可通過以下内容說明該 水銀並未結合的原因。 ° • 從作為陰極的電極5的内周部釋放出的電子通過電場 而得以加速，從而獲得能量來將空間中所存在的氣體分子 電離。而且，該經過電離的氣體成為正離子。從電極=的 . 内周部接連不斷地釋放出電子，因此隨之也生成正離子， 從而水銀離子被從電極5的内周部電性地排除而消失。因 此，即便電極5的飛散物質沉積並收納在電極5的内周部， 水銀也不會結合在飛散物質上。換言之，如果電極5的°飛 散物質收納在電極5的内周部，則飛散物質就不會和水銀 結合而形成化合物。 (考察）根據以上的實測例得到如下知識見解，即， 如果以將電極5的飛散物質收納在電極5的内周部的方式 而設定筒狀電極5的長度尺寸，則可削減密封的水銀量。 具體而言，電極5的長度尺寸與黑化部Bk的長度尺寸之 參 和為約8 mm，因此如果將這視作電極5的飛散:質的飛 來距離，則認為只要使筒狀電極5的長度尺寸為約8麵， 則就能將飛散物質的一大半收納在電極5的内周部。進 而，根據實測例3，結果是外徑尺寸相對於筒狀電極 長度尺寸的比，亦即長度尺寸/外徑尺寸為8 mm/27 mmd。因此，通過將筒狀電極5的長度尺寸設定為8随 或8 mm以上，將外徑尺寸相對於長度尺寸的比設定為3 或3以上，則能抑制由減鐘所導致的水銀的消耗，從而可 13 201021083 削減密封的水銀1。據此，為了使能將電極Bk. Further, as a result of analyzing the blackened portion Bk, the same element as the material of the electrode 5 is detected from the blackened portion Bk, which is an electrode material in which the electrode 5 is sputtered and scattered during discharge during lighting. . Further, it was confirmed that the electrode material of the ore-killing mineral was scattered in a fine molecular state, and therefore ® was active and reacted with mercury vapor and adhered to the blackened portion Bk as a compound having a low vapor pressure. Therefore, if the reaction of the sputtered electrode material with mercury can be prevented or suppressed, it is considered that the initial mercury seal amount can be reduced. Further, by observing which part of the tubular electrode 5 is recorded by X-ray imaging, it is judged that the portion St near the bottom end portion 5b of the inner peripheral surface has been selectively deposited. (Measurement Example 2) Next, as shown in FIG. 3(a), FIG. 3(b), and FIG. 3(c), specifically, the outer diameter dimension p21 • mm and the wall thickness dimension t are prepared as electrodes. 〇.l mm, the length dimension of the opening portion 5a to the bottom end portion 5b in the axial direction 1^1 = 5 111111 ((&) of Fig. 3, 1^2 = 7111111 ((b) of Fig. 3), L3 The three cylindrical electrodes 5' formed of Ni having a diameter of 10 mm (Fig. 3(c)) are joined to the cylindrical electrode 5 by a sealing member 6a of an outer diameter of 〇·8 mm and a length of 4 mm. The electrode unit 3 is formed up. These electrode units 3 are packaged at both end portions of the glass bulb 2 having an outer diameter of 3.4 mm and a length of 1 mm, and 1 > 1 of 1 > 1031 is regarded as a rare gas, and 3.9 Mg mercury is sealed inside the glass bulb 2 to produce 9 201021083 cold cathode discharge lamp 1. Further, these cold cathode discharge lamps 1 were turned on at a lamp current of 10 mA for 6,000 hours, and the appearance observation and the analysis of the sealed mercury in the tube were performed as shown in the following table. In the actual measurement, first, the cylindrical electrode 5 was used. The lamps of length LpSmm (Fig. 3(a)) and L2=7 mm (Fig. 3(b)) were measured and analyzed, and the length dimension was L3 = 10 mm (Fig. 3(c) The lamp is subjected to measurement analysis. [Table 2] ρς—----- Mercury amount (mg) Part of the electrode tube blackened without blackening of the phosphor _ electrode length dimension part of the total layer ^___ — L] = 5 mm 0.02 3.2 0.6 3.82 ._ L2=7 mm 0.04 2.9 0.8 3 75 —L3=10 mm 0.04 0.04 _ —丨3.6 3.68 — The sampling of the combined clamp here is as follows: 5 mm from the closed part of the glass tube 2 At P1, the glass bulb 2 is cut off from the electrode 5 as the "electrode portion", and the glass tube 2 is cut off at the clogging site with the closed portion: the portion is used as the "lamp 4" glassless tube 2 Part of the material is as shown in Fig. 3(a) and Fig. 3: the second dimension is ^11: in the vicinity of the bottom end portion % of the inner peripheral surface of the cylindrical electrode 5 201021083 st is selectively sputtered. Further, the following results are obtained: in the lamp of the electrode 5 having a length dimension of = 5 mm and the lamp of B 2 = 7 mm, the glass bulb 2 generated near the opening 5a of the electrode 5 The length of the blackened portion Bk of the inner surface is different, about 3 mm in the lamp of Ι^ = 5ιηιη, about 1 mm in the lamp of L2 = 7 mm, the lamp of 1^ = 5 mm is long, and the length of the electrode 5 is long. The sum of the dimensions and the length dimension of the blackened portion Bk is about 8 mm, and it is found that the sealed mercury is concentrated in the bulb blackening portion Bk as in the above-described measurement example 1. Therefore, according to the above-described In the content, the position of the electrode $ is the same, and the scattering position of the scattered matter of the electrode 5 is the same, and it is determined that the scattered matter of the electrode 5 is physically flying from the position where the sputtering occurs, so that it is considered to be a cylindrical shape. When the length of the electrode 5 is increased, and the scattering material of the electrode 5 is accommodated in the inner peripheral portion of the electrode 5, the scattering material does not combine with mercury to form a compound. According to the above knowledge, as shown in FIG. 3(c). In the lamp having the length of the tubular electrode 5 of L3 = 10 mm, it is considered that the scattered matter of the electrode 5 is accommodated in the inner peripheral portion of the electrode 5, and is not observed in the "light blackening portion" of the glass bulb 2 at eight places. In the blackening, almost no mercury was detected. (Measurement Example 3) The same measurement as in the measurement example 2 was carried out by changing the conditions such as the size of the tubular electrode 5, and the outer diameter was φ2.7 mm, and the wall thickness was prepared. Dimensions t〇1 mm, length dimensions l1==5 mm, 4 kinds of cylindrical electrodes 5' formed of a Ni alloy with L2 = 7 mm, L3 ==l〇mm, L4 = 15 mm, and a sealing member 6a of a Kov line having an outer diameter of 0·8 mm and a length of 4 mm The electrode unit 3 is formed by being bonded to the cylindrical electrode 5. The two electrode unit 3 is packaged at both end portions of the glass bulb 2 having an outer diameter of 3.4 mm and a length of 1000 11 201021083 and a 6×10 Pa of Ne-Ar is used. A cold cathode discharge lamp 1 was produced by sealing a rare gas and 3.9 mg of mercury inside the glass bulb 2. Further, these cold cathode discharge lamps 1 were turned on for 6,000 hours at a lamp current of 13 mA, and the appearance observation and the analysis of the mercury sealed in the inside of the lamp were as follows. [Table 3] Amount of mercury (mg) Part electrode length Ruler electrode Lamp blackening section No blackening of phosphor layer Total Li = 5 mm 0.02 3.2 ~ 11 One - 0.6 3.82 3.75 • Λ λ r\ L2=7 Mm 0.04 2.9 ------ 0.8 Ί L3=10 mm 0.04 0.04 —— 3.6 L4=15 mm 0.04 0.04 "" ------- 3.7 3.68 "------ 3.78 -- — _ ❹ According to the actual measurement example, the blackening of the glass bulb 2 occurs in the lamp having the length of the electrode 5 of l = mm and L2 = 7 mm, and the glass bulb 2 produced near the electrode opening 5a The inner table 'size is τ at the length of the electrode 5 is 3 mm, in the lamp of 1^7_ is about 1 mm, and the sum of the electrode size and the length dimension of the blackened portion Bk is about 8 faces. It is known that the __ water towel is in the black lining = the phase = face, the length dimension of the electrode 5 is L3 = 1 〇 mm, and the face lamp is not observed in one side. (4) When trying to adjust the inner peripheral portion of 201021083, although the scattered matter of the electrode 5 is attached, mercury is hardly detected in these scattered substances. The reason why the mercury is not combined can be explained by the following. ° • Electrons released from the inner peripheral portion of the electrode 5 as a cathode are accelerated by an electric field, thereby obtaining energy to ionize gas molecules existing in the space. Moreover, the ionized gas becomes a positive ion. Since electrons are continuously emitted from the inner peripheral portion of the electrode =, positive ions are also generated in the same manner, so that the mercury ions are electrically removed from the inner peripheral portion of the electrode 5 and disappear. Therefore, even if the scattered matter of the electrode 5 is deposited and housed in the inner peripheral portion of the electrode 5, mercury is not bonded to the scattered matter. In other words, if the scattering material of the electrode 5 is accommodated in the inner peripheral portion of the electrode 5, the scattering material does not combine with mercury to form a compound. (Investigation) According to the above-described actual measurement example, it is possible to reduce the amount of mercury in the seal by setting the length dimension of the tubular electrode 5 so that the scattering material of the electrode 5 is housed in the inner peripheral portion of the electrode 5. . Specifically, the length dimension of the electrode 5 and the length dimension of the blackened portion Bk are about 8 mm. Therefore, if this is regarded as the scattering of the electrode 5: the flying distance of the mass, it is considered that the cylindrical electrode 5 is required. With a length of about eight faces, a large portion of the scattered matter can be accommodated in the inner peripheral portion of the electrode 5. Further, according to the test example 3, the result is the ratio of the outer diameter dimension to the length dimension of the cylindrical electrode, that is, the length dimension/outer diameter dimension is 8 mm / 27 mmd. Therefore, by setting the length dimension of the tubular electrode 5 to 8 or more or 8 mm or more and setting the ratio of the outer diameter dimension to the length dimension to 3 or more, it is possible to suppress the consumption of mercury caused by the clock reduction. Thus 13 201021083 cuts the sealed mercury 1 . Accordingly, in order to enable the electrode
收納在電極5_周部的可靠性提高，根據實測例U 實測例3而推測出’將筒狀電極5的長度尺寸設定為13咖 或13 mm α上’且將長度尺寸相對於外徑尺寸的比設定為 4或4以上為佳。 ‘ 根據如上所述的本實施方式，如上述考察中所述，通 過以將電極5的飛散物質收納在電極5的内周部的方式而 設定筒狀電極5的長度尺寸，财提供—種能使由賴導 致的水銀的消耗受到抑制、削減密封的水銀量的冷陰極放 電燈卜 " 其次，對本發明的發光裝置的實施方式進行說明。省 略圖示，將所述實施方式的放電燈i安裝在裝置本體上則 可構成發光裝置。此處，發光裝置的概念是包含顯示器裝 置及所謂的照亮空間的照明器具在内。例如，可應用^液 晶面板的背光裝置等的各種顯示器裝置、及在室内或室外 所使用的照明器具。再者’當為背光裝置時，可應用直下 方式、侧光（side light)方式等的任一方式。根據此種發 光裝置而可提供發揮所述實施方式的效果的發光裝置。 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，當可作些許之更動與潤飾，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。 ° 【圖式簡單說明】 圖1是表示冷陰極放電燈的截面圖。 201021083The reliability of the peripheral portion of the electrode 5_ is improved, and it is estimated from the actual measurement example 3 that the length dimension of the cylindrical electrode 5 is set to 13 or 13 mm α and the length dimension is relative to the outer diameter. The ratio is preferably 4 or more. According to the present embodiment as described above, the length of the tubular electrode 5 is set by accommodating the scattering material of the electrode 5 in the inner peripheral portion of the electrode 5 as described in the above examination. A cold cathode discharge lamp in which the consumption of mercury by the slag is suppressed and the amount of mercury sealed is reduced. Next, an embodiment of the light-emitting device of the present invention will be described. It is to be noted that the discharge lamp i of the above embodiment can be mounted on the apparatus body to constitute a light-emitting device. Here, the concept of a light-emitting device is a lighting fixture comprising a display device and a so-called illuminated space. For example, various display devices such as a backlight device for liquid crystal panels and lighting devices used indoors or outdoors can be applied. Further, when it is a backlight device, any of a direct mode, a side light method, or the like can be applied. According to such a light-emitting device, a light-emitting device that exhibits the effects of the above-described embodiments can be provided. While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application. ° [Simple Description of the Drawings] Fig. 1 is a cross-sectional view showing a cold cathode discharge lamp. 201021083
說明的示意性的截面圖。 圖3之（a)、圖3之（b)、圖3之（c)是用來對相 同實施方式的冷陰極放電燈進行說明的示意性的截面圖。 【主要元件符號說明】 1冷陰極放電燈 3電極單元 ⑩5筒狀電極 5b底端部 7玻璃珠 2透光性的氣密燈管 璃燈管） 4螢光體層 5a開口部 6 電極導線 A燈管黑化部 B無黑化的螢光體層部 Bk黑化部 LI、L2、L3、L4長度尺寸P1與玻璃燈管2的兩端的A schematic cross-sectional view of the description. Fig. 3 (a), Fig. 3 (b), and Fig. 3 (c) are schematic cross-sectional views for explaining a cold cathode discharge lamp of the same embodiment. [Main component symbol description] 1 cold cathode discharge lamp 3 electrode unit 105 cylindrical electrode 5b bottom end portion 7 glass beads 2 translucent airtight lamp glass tube) 4 phosphor layer 5a opening portion 6 electrode wire A lamp Tube blackening portion B blackened phosphor layer portion Bk blackening portion LI, L2, L3, L4 length dimension P1 and both ends of the glass bulb 2
St内周面的底端部5b附近封閉部相距5 mm的位置 的部分 t壁厚尺寸 15Part of the position near the bottom end portion 5b of the inner peripheral surface of the St. 5b at a distance of 5 mm. t Thickness of the wall 15