200805423 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種光源，特別關於一種螢光燈。 【先前技術】 由於個人化電子產品日新月異，除了對於產品品質的 要求越來越高外，對於產品之功能要求及易於攜帶亦不例 外，當然，顧示器亦為電子產品中不可或缺的一項，故相 對的，對於所使用的顯示器則需要求具有輕薄短小且耗電 量低之功效。就顯示器而言，液晶顯示器（Liquid crystal Display，LCD)以其耗電量低、發熱量少、重量輕、以及 非輻射性等等優點，早已被使用於各式各樣的電子產品 中’並且已逐漸地取代傳統的陰極射線管顯示器（c—200805423 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention relates to a light source, and more particularly to a fluorescent lamp. [Prior Art] Due to the ever-changing personalization of electronic products, in addition to the increasingly high requirements for product quality, the functional requirements and easy portability of products are no exception. Of course, the device is also an indispensable one in electronic products. Therefore, the relative use of the display requires a light, short, and low power consumption. In terms of displays, liquid crystal displays (LCDs) have long been used in a wide variety of electronic products because of their low power consumption, low heat generation, light weight, and non-radiation. Has gradually replaced the traditional cathode ray tube display (c-
Cathode Tube Display，CRT Display )。 一般而言，液晶顯示器係主要包含一液晶面板、以及 一背光模組。其中，液晶面板係主要具有兩基板、以及一 夾設於兩基板間的液晶層；而背光模組係作為背光源使 用，其係可將來自一光源的光線均勻地分佈在液晶面板之 表面。 一般而s ’液晶顯不主要係以榮光燈（Fluorescent Lamp)作背光模組中之光源。其中，螢光燈又可分為冷陰 極螢光燈（Cold Cathode Fluorescent Lamp，CCFL)、以及 熱陰極螢光燈（Hot Cathode Fluorescent Lamp )。冷陰極榮 光燈係以冷陰極電極來代替會發熱之熱陰極電極（例如： 5 200805423 鎢絲），由於冷陰極螢光燈可低溫啟動，再加上高效和長 壽之特點，故使得冷陰極螢光燈成為液晶面板主要之背光 源。 睛參照圖1及圖2 ’習知之榮光燈1，係以一冷陰極 、螢光燈為例，係包含一玻璃管11、一内電極12以及一螢 -光層13 (Phosphor Layer)。其中，玻璃管11内係充填有 水銀蒸氣（即汞蒸氣)及純氣（例如：氣、氬之混合氣體）， 作為放電介質（Discharge Medium )，而内電極12係具有 _ 一導線121，並穿射玻璃管11，以接收外部輸入之一電流。 在此，係以使用二個内電極12並分別設置於玻璃管11内 之二端為例，而螢光層13則均勻塗佈於玻璃管11之内壁。 當螢光燈1於點亮時，内電極12經由導線121輸入 電流而釋出電子，當電子經電場加速碰撞玻璃管11内部 之放電介質時，則使得放電介質處於激態，然後釋出紫外 光以回到基態。其中，放電介質所釋放之紫外光(UV)則藉 0 由玻璃管11内部之螢光層13吸收，而釋放出可見光。 然而，由於製作螢光燈1之玻璃管11，所使用之材質 為鈉药玻璃，或高絡玻璃，而其材質皆含有大量的鈉(Na)， 故當螢光燈1被點亮的過程時，玻璃管11中的鈉易與放 ―電介質中之汞相互結合，而成為鈉汞合金（黑色），並沉 積於螢光層13中，造成螢光層13變質，而產生黑化現象， 使得螢光層13漸漸不能再與紫外光作用，也無法發出可 見光。如此，不但造成榮光燈1之發光效率降低，甚至使 螢光燈1之壽命變得更短，需時常更換新的螢光燈1。 200805423 因此，如何提供一種可避免燈管黑化現象發生，並提 升使用率及壽命之螢光燈，實屬當前重要課題之一。 【發明内容】 ^ 有鑑於上述課題，本發明之目的為提供一種能夠避免 •燈管黑化現象發生，並提升使用率及壽命之螢光燈。 緣是，為達上述目的，依本發明之螢光燈，包含一玻 璃管、一隔離層以及一内電極。本發明中，玻璃管係充填 • 一放電介質，而隔離層係環設於玻璃管之内壁，内電極係 設置於玻璃管内之一端部，並鄰設於隔離層。 承上所述，因依據本發明之一種螢光燈，係將一隔離 層環設於一玻璃管之内壁，且一内電極係設置於玻璃管之 一端部，並鄰設於隔離層。與習知技術相較，本發明之螢 光燈係藉由隔離層環設於玻璃管上，使隔離層不僅可避免 玻璃管中之鈉與玻璃管内充填之放電介質作用，而造成黑 _ 化，更可吸收紫外光，並避免紫外光射出，以使螢光燈充 分利用紫外光，並作用產生可見光源，而達到提升螢光燈 之使用率及壽命之功效。 "【實施方式】 以下將參照相關圖式，說明依本發明較佳實施例之一 種螢光燈。 請參照圖3所示，本發明較佳實施例之一種螢光燈2, 係包含一玻璃管21、一隔離層22以及一内電極23。本實 7 200805423 施例之螢光燈2並無限制，在此係以一冷陰極螢光燈（c〇u Cathode Fluorescent Lamp，CCFL)為例；而於應用上，亦 無限制，例如：照明裝置之光源或液晶顯示器中背光模組 之光源。 於本實施例中，玻璃管21係充填一放電介質，而放 •電介質並無限制，於實施上，係為惰性氣體(例如：氬、氖）、 水(Hg)、或其混合氣體，例如：惰性氣體及汞所混合之氣 體。 睛同時參照圖3與圖4所示，本實施例之隔離層22， 係環設於玻璃管21之内壁，而隔離層22之設置方式並無 限制，在此係以一塗佈方式設置。於本實施例中，隔離層 22之材吳並無限制，於實施上，係包含三氧化二紀(丫2〇3)， 其材質可避免玻璃管21内所包含之成份，例如：納(Na) 與放電介質（例如··汞），相互作用，而造成黑化。故隔離 層22具有保護及避免玻璃管21黑化之功效。此外，隔離 層22之材夤更可包含二氧化鈦(Ti〇2)、氧化鈽⑺及氧 化鋅（ZnO)至少其中之-，其材質可吸收紫外光，並避免 紫外光射出玻璃f 21，而形成抗紫外光層。於實施上，也 可將三氧化二紀同時與二氧化鈦、氧化鈽及氧化辞混合， ’以構成隔離層22。 於本實施例中，螢光燈2更包含-螢光層24,係設置 於隔離層22上，使隔離層22位於玻璃管21及螢光層24 之間，此外，由於螢光層24可用以吸收紫外光(υν)並放 出可見光，故本實施例係利用隔離層22與螢光層24相配 200805423 合，以提升吸收紫外光，並避免紫外光射出玻璃管21之 功效。 明再參照圖3所示，本實施例之内電極23，其設置並 無限制，但須設置於玻璃管21内之一端部，故在此係以 兩個内電極23分別設置於玻璃管21内之各一端部為例。 β此外，内電極23亦同時鄰設於隔離層22。於本實施例中， 内電極23並無限制，但須為一導體，故内電極23之材質 須為導電材質，於實施上可為金屬材質，例如：鎢（w)、 馨鉬（Mo)或鐵鈷鎳合金(KOV)。 另外，於本實施例中，内電極23係具有一導線231， 並穿設玻璃管21，係用以接收外部輸入之一電流，以使内 電極23釋出電子，並經電場加速碰撞放電介質，使放電 介質處於激態，而釋放出紫外光，此時，紫外光則會激發 設置於玻璃管21内部之螢光層24，而發出可見光，以作 為光源。 φ 請再參照圖3所示，本實施例之螢光燈2更包含一杯 狀導體25，係包覆玻璃管21之該端部，並與内電極23相 對設置，在此係以兩個杯狀導體25分別包覆玻璃管21之 各端部為例，而杯狀導體25之材質並無限制，係可與内 電極22之材質相同，即亦使用導電且為金屬讨負’例如· 鎢(W)、鉬(Mo)、鎳(Ni)、鈮(Nb)或其合金等等。 由於内電極22常會被激發之放電介質之離子義擊或 吸附而使内電極22磨耗受損、放電特性下降’故係藉由 杯狀導體25包覆玻璃管21之各端部，除了 $避免被玻璃 9 200805423 管21内部之氣體離子轟擊外，更進而使螢光燈2之壽命 延長。 綜上所述’因依據本發明之一種螢光燈，係將一隔離 層環設於一玻璃管之内壁，且一内電極係設置於玻璃管之 • 一端部，並鄰設於隔離層。與習知技術相較，本發明之螢 - 光燈係藉由隔離層環設於玻璃管上，使隔離層不僅可避免 玻璃管中之鈉與玻璃管内充填之放電介質作用，而造成黑 化，更可吸收紫外光，並避免紫外光射出，以使螢光燈充 • 分利用紫外光，並作用產生可見光源，而達到提升螢光燈 之使用率及壽命之功效。另外，更可藉由包覆杯狀導體於 玻璃管之各端部，以避免内電極受到氣體離子之轟擊，進 而延長螢光燈之壽命。 以上所述僅為舉例性，而非為限制性者。任何未脫離 本發明之精神與範疇，而對其進行之等效修改或變更，均 應包含於後附之申請專利範圍中。 【圖式簡單說明】 圖1係為習知之一種螢光燈之一示意圖； • 圖2係為圖1沿A-A’直線之一剖視圖； - 圖3為顯示依本發明較佳實施例之一種螢光燈之一示 意圖，以及 圖4係為圖1沿B-B’直線之一剖視圖。 元件符號說明： 200805423 1、2 螢光燈 11、21 玻璃管 12、23 内電極 121 、 231 導線 13、24 螢光層 22 隔離層 25 杯狀導體 A-A’、B-B’ 線段Cathode Tube Display, CRT Display ). In general, a liquid crystal display mainly includes a liquid crystal panel and a backlight module. The liquid crystal panel mainly has two substrates and a liquid crystal layer interposed between the two substrates; and the backlight module is used as a backlight to uniformly distribute light from a light source on the surface of the liquid crystal panel. In general, the s' liquid crystal display is mainly a light source in a backlight module using a Fluorescent Lamp. Among them, the fluorescent lamp can be further divided into a Cold Cathode Fluorescent Lamp (CCFL) and a Hot Cathode Fluorescent Lamp. The cold cathode glory lamp replaces the hot cathode electrode that generates heat with a cold cathode electrode (for example: 5 200805423 tungsten wire). Since the cold cathode fluorescent lamp can be started at a low temperature, coupled with the characteristics of high efficiency and longevity, the cold cathode firefly is made. The light becomes the main backlight of the LCD panel. Referring to Figures 1 and 2, the conventional glory lamp 1 comprises a cold cathode and a fluorescent lamp as an example, comprising a glass tube 11, an inner electrode 12 and a phosphor layer 13 (Phosphor Layer). The glass tube 11 is filled with mercury vapor (ie, mercury vapor) and pure gas (for example, a mixed gas of gas and argon) as a discharge medium, and the inner electrode 12 has a wire 121, and The glass tube 11 is pierced to receive a current from an external input. Here, the two ends in which the two internal electrodes 12 are used and respectively disposed in the glass tube 11 are exemplified, and the phosphor layer 13 is uniformly applied to the inner wall of the glass tube 11. When the fluorescent lamp 1 is lit, the internal electrode 12 inputs a current through the wire 121 to release electrons. When the electron accelerates against the discharge medium inside the glass tube 11 by the electric field, the discharge medium is in an excited state, and then the ultraviolet light is released. Light returns to the ground state. Among them, the ultraviolet light (UV) released by the discharge medium is absorbed by the fluorescent layer 13 inside the glass tube 11 to release visible light. However, since the glass tube 11 of the fluorescent lamp 1 is made of sodium silicate glass or high-cold glass, and the material thereof contains a large amount of sodium (Na), the process of illuminating the fluorescent lamp 1 is performed. When the sodium in the glass tube 11 is easily combined with the mercury in the discharge medium, it becomes a sodium amalgam (black) and is deposited in the phosphor layer 13, causing the phosphor layer 13 to deteriorate and causing blackening. The phosphor layer 13 is gradually prevented from reacting with ultraviolet light and emitting visible light. In this way, not only the luminous efficiency of the glory lamp 1 is lowered, but also the life of the fluorescent lamp 1 is shortened, and the new fluorescent lamp 1 needs to be replaced from time to time. 200805423 Therefore, how to provide a fluorescent lamp that can avoid the blackening of the lamp and improve the usage and life is one of the most important issues at present. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a fluorescent lamp which can avoid the occurrence of blackening of a lamp tube and improve the use rate and life. For the above purpose, the fluorescent lamp according to the present invention comprises a glass tube, an isolating layer and an inner electrode. In the present invention, the glass tube is filled with a discharge medium, and the separation layer is disposed on the inner wall of the glass tube, and the inner electrode is disposed at one end of the glass tube and adjacent to the isolation layer. As described above, a fluorescent lamp according to the present invention has an isolation layer ring disposed on an inner wall of a glass tube, and an inner electrode is disposed at one end of the glass tube and adjacent to the isolation layer. Compared with the prior art, the fluorescent lamp of the present invention is disposed on the glass tube by the spacer layer, so that the isolation layer can not only avoid the action of the sodium in the glass tube and the discharge medium filled in the glass tube, but also causes black _ It can absorb ultraviolet light and avoid ultraviolet light emission, so that the fluorescent lamp can make full use of ultraviolet light and act to generate visible light source, thereby achieving the effect of improving the utilization rate and life of the fluorescent lamp. <Embodiment> Hereinafter, a fluorescent lamp according to a preferred embodiment of the present invention will be described with reference to the related drawings. Referring to FIG. 3, a fluorescent lamp 2 according to a preferred embodiment of the present invention comprises a glass tube 21, an isolation layer 22 and an internal electrode 23. This is a limitation of the fluorescent lamp 2 of the embodiment of the present invention. In this case, a cold cathode fluorescent lamp (CCFL) is taken as an example; and in application, there is no limitation, for example: illumination The light source of the device or the light source of the backlight module in the liquid crystal display. In the present embodiment, the glass tube 21 is filled with a discharge medium, and the discharge medium is not limited. In practice, it is an inert gas (for example, argon, helium), water (Hg), or a mixed gas thereof, for example. : a gas mixed with an inert gas and mercury. Referring to FIG. 3 and FIG. 4 simultaneously, the spacer layer 22 of the present embodiment is provided on the inner wall of the glass tube 21, and the manner of disposing the spacer layer 22 is not limited, and is disposed in a coating manner. In the present embodiment, the material of the spacer layer 22 is not limited. In practice, it includes the third-generation (三2〇3) material, which can avoid the components contained in the glass tube 21, for example, nano ( Na) interacts with a discharge medium (eg, mercury) to cause blackening. Therefore, the spacer layer 22 has the effect of protecting and preventing the blackening of the glass tube 21. In addition, the material of the spacer layer 22 may further comprise at least one of titanium dioxide (Ti〇2), yttrium oxide (7) and zinc oxide (ZnO), the material of which can absorb ultraviolet light and prevent ultraviolet light from being emitted from the glass f 21 to form Anti-UV layer. In practice, it is also possible to combine the titanium dioxide with titanium dioxide, cerium oxide and oxidized metal to form the separator 22. In the present embodiment, the fluorescent lamp 2 further includes a phosphor layer 24 disposed on the isolation layer 22 such that the isolation layer 22 is located between the glass tube 21 and the phosphor layer 24. Further, since the phosphor layer 24 is available In order to absorb ultraviolet light (υν) and emit visible light, the present embodiment uses the spacer layer 22 and the phosphor layer 24 to match the 200805423 to enhance the absorption of ultraviolet light and to prevent the ultraviolet light from being emitted from the glass tube 21. Referring to FIG. 3 again, the internal electrode 23 of the present embodiment is not limited in its arrangement, but must be disposed at one end of the glass tube 21, so that two internal electrodes 23 are respectively disposed on the glass tube 21. Each end portion of the inside is taken as an example. In addition, the internal electrode 23 is also adjacent to the isolation layer 22 at the same time. In this embodiment, the internal electrode 23 is not limited, but must be a conductor. Therefore, the material of the internal electrode 23 must be a conductive material, and can be made of a metal material, for example, tungsten (w), smouldering molybdenum (Mo). Or iron cobalt nickel alloy (KOV). In addition, in the embodiment, the internal electrode 23 has a wire 231 and is disposed through the glass tube 21 for receiving an external input current to cause the internal electrode 23 to release electrons and accelerate the collision of the discharge medium by the electric field. The discharge medium is in an excited state, and ultraviolet light is released. At this time, the ultraviolet light excites the fluorescent layer 24 disposed inside the glass tube 21 to emit visible light as a light source. φ. Referring to FIG. 3 again, the fluorescent lamp 2 of the present embodiment further includes a cup-shaped conductor 25 covering the end of the glass tube 21 and disposed opposite the inner electrode 23, where two cups are provided. The shape of the cup-shaped conductor 25 is not limited, and the material of the cup-shaped conductor 25 is the same as that of the inner electrode 22, that is, it is also electrically conductive and is made of metal, for example, tungsten. (W), molybdenum (Mo), nickel (Ni), niobium (Nb) or alloys thereof and the like. Since the internal electrode 22 is often subjected to ion bombardment or adsorption of the excited discharge medium, the internal electrode 22 is worn and the discharge characteristics are degraded, so that the ends of the glass tube 21 are covered by the cup conductor 25, except for avoiding The life of the fluorescent lamp 2 is extended by the bombardment of the gas ions inside the tube 21 of the glass 9 200805423. In view of the above, a fluorescent lamp according to the present invention has an isolation layer ring disposed on an inner wall of a glass tube, and an inner electrode is disposed at one end of the glass tube and adjacent to the isolation layer. Compared with the prior art, the fluorescent lamp of the present invention is disposed on the glass tube by the spacer layer, so that the isolation layer can not only avoid the action of the sodium in the glass tube and the discharge medium filled in the glass tube, thereby causing blackening. It can absorb ultraviolet light and avoid ultraviolet light emission, so that the fluorescent lamp can fully utilize ultraviolet light and act to generate visible light source, thereby achieving the effect of improving the utilization rate and life of the fluorescent lamp. In addition, the cup electrode can be coated on each end of the glass tube to prevent the internal electrode from being bombarded by gas ions, thereby prolonging the life of the fluorescent lamp. The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the present invention are intended to be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of one of the conventional fluorescent lamps; FIG. 2 is a cross-sectional view taken along line A-A' of FIG. 1; FIG. 3 is a view showing a preferred embodiment of the present invention. A schematic view of one of the fluorescent lamps, and FIG. 4 is a cross-sectional view taken along line BB' of FIG. Symbol description: 200805423 1, 2 Fluorescent lamp 11, 21 Glass tube 12, 23 Internal electrode 121, 231 Conductor 13, 24 Fluorescent layer 22 Isolation layer 25 Cup conductor A-A', B-B'