1336094 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種冷陰極螢光燈，特別是關於一 種可增進發光效率之冷陰極螢光燈。 【先前技術】 k著產業日益發達，行動電話、數位相機、筆記 5•電腦、桌上型電腦等數位化工具無不朝向更便利、 更夕功忐且較美觀的方向發展。這些電子產品的顯示 螢幕是不可或缺的人機溝通界面，且上述產品之顯示 螢幕可為使用者帶來更多的操作便利。近年來，大部 刀的行動電話、數位相機、數位攝影機、筆記型電腦 以及桌上型電腦上之顯示螢幕皆以液晶顯示面板 (LCD panel)為主流，然而’由於液晶顯示面板本身 並不具有發光的功能’故在液晶顯示面板下方必須提 供一背光模組（back light module)以提供光源，進而 達到顯示的功能。 習知的背光模組包括發光二極體背光模組及冷 陰極螢光燈管（cold cathode fluorescent lamp，CCFL ) 等。依背光源之位置不同，背光模組一般可分為側光 式及直下式兩種。 第一 A圖為一種習知冷陰極螢光燈的結構示意 圖。請參閱第一圖，習知的冷陰極螢光燈丨包括一燈管 11、一螢光層12及一電極對13。其中，燈管11内部具 有一腔體16並充填放電氣體，放電氣體包括一惰性氣 體16a及一汞蒸氣16b，螢光層12係塗佈於腔體16的 5 r1336094- 内壁上電極對13分別配置於腔艘兩端，並與一電源 (未繪示）電性連接。當電源驅動電極對13時，電極對 13於腔體16内放電，同時游離電子在高壓電場驅動下 加速前進，在此過程中，電子會與惰性氣體16a及汞蒸 氣16b碰撞並產生能量交換，汞蒸氣16b即被激發至激 發態，隨即再回到基態，而汞蒸氣〗6b回到基態之同 時，會以放射紫外光之形式釋放能量，而當汞蒸氣16b 所釋放之紫外光激發腔體16内壁之螢光層12時，螢光 層12會吸收輻射能後放射出可見光，而達到發光的目 的。 請參閱第一 B圖，第一 B圖為第一 A圖之螢光層 的局部示意圖。依據發光效率以及製程特性的考量， 習知之螢光層12係以多層結構塗佈於腔體16之内壁。 當腔體16内部產生紫外光並激發螢光層12時，由於習 知之螢光層12為多層結構，因此，螢光層底部較不容 易被紫外光激發，亦即靠近燈管丨丨管壁之螢光層具有 較低的被激發率，如此一來，導致冷陰極螢光燈丨的發 光效率無法提昇。 因此，如何提供一種冷陰極螢光燈，可以有效地提 高發光輝度，實為現今的重要課題之一。 【發明内容】 一有鑑於上述’本發明的目的是在提供一種能夠提 高發光輝度的冷陰極螢光燈。β 1336094 為達上述或與其他目的，本.發明提出一種一種冷 陰極螢光燈，包括一燈管、一螢光層、一電極對及一放 * 電氣體。燈管具有一腔體，螢光層係配置於腔體之内壁 . 上’螢光層包括複數個螢光粒子及紫外光穿透粒子，電 極對係設置於腔體之兩端，而放電氣體係充填於腔體 内。 依照本發明較佳實施例所述之冷陰極螢光燈，其 中^'、外光穿透粒子可供波長範圍大約介於14〇nm至 380nm之間的紫外光穿透。 依照本發明較佳實施例所述之冷陰極螢光燈，其 中紫外光穿透粒子之材質係為氧化矽、氧化鋁、氧化 鑭、氧化釔、氧化鍅、氧化鈣或其混合物。 依照本發明較佳實施例所述之冷陰極螢光燈，其 中紫外光穿透粒子之形狀係為圓形、橢圓形、不規則形 或長條形。 • 依照本發明較佳實施例所述之冷陰極螢光燈，其 中放電氣體包括一惰性氣體及一汞蒸氣。 其 依照本發明較佳實施例所述之冷陰極螢光燈，其 •惰性氣體包括氙氣、氬氣、氦氣或氘氣。 ， 依照本發明較佳實施例所.述之冷陰極螢光燈，其 中燈管之材質英玻璃、察夕玻璃或無鐵察夕酸鹽 玻璃。 依‘、、、本發明較佳實施例戶斤述之冷陰極營光燈，其 更包括二導線，係分別自燈管外部貫穿且延伸至燈管ς 7 内部空間。 依照本發明較佳實施例所述之冷陰極螢光燈，其 中導線之一端係連接於電極而配置於腔體之内部空間 内。 為達上述或與其他目的，本發明另提出一種冷陰 極螢光燈，包括一燈管、一螢光層、一紫外光穿透膜、 一電極對及一放電氣體。燈管具有一腔體，螢光層係 設置於腔體之内壁上’螢光層螢光層係具有複數個凹陷 部’電極對係設置於腔體之兩端，而放電氣體係充填 於腔體内。 依照本發明較佳實施例所述之冷陰極螢光燈，其 更包括一紫外光穿透膜覆蓋於螢光層上。 依照本發明較佳實施例所述之冷陰極螢光燈，其 中凹陷部彼此之間係為連續設置或不連續設置。 依照本發明較佳實施例所述之冷陰極螢光燈，其 中凹陷部之形狀係為圓形、矩形或任意形狀。 依照本發明較佳實施例所述之冷陰極螢光燈，其 中螢光層包括複數個螢光粒子及紫外光穿透粒子。 综上所述’在本發明之冷陰極螢光燈中，螢光層 包括有複數個紫外光穿透粒子或是螢光層覆蓋有一紫 外光穿透膜’因此，在螢光層底部之螢光粒子可充分地 被激發’如此一來’即可提高冷陰極螢光燈的發光輝 度。 為讓本發明之上述和其他目的、特徵和優點能更 1336094 明顯易懂’下文特舉較佳實施例·，並配合所附圖式， 作詳細說明如下❶ · 【實施方式】 第一實施例1336094 IX. Description of the Invention: [Technical Field] The present invention relates to a cold cathode fluorescent lamp, and more particularly to a cold cathode fluorescent lamp which can improve luminous efficiency. [Prior Art] K is increasingly developed in the industry, and mobile phones, digital cameras, notebooks, computers, desktop computers and other digital tools are all moving toward more convenient, more efficient and more aesthetically pleasing directions. The display screen of these electronic products is an indispensable human-machine communication interface, and the display screen of the above products can bring more operation convenience to the user. In recent years, most of the mobile phones, digital cameras, digital cameras, notebook computers, and display screens on desktop computers have been dominated by liquid crystal display panels (LCD panels), however, 'because the liquid crystal display panels themselves do not have The function of illuminating 'Therefore, a backlight module must be provided under the liquid crystal display panel to provide a light source to achieve the display function. The conventional backlight module includes a light-emitting diode backlight module and a cold cathode fluorescent lamp (CCFL). Depending on the position of the backlight, the backlight module can be generally divided into two types: side light type and direct type. The first A is a schematic view of a conventional cold cathode fluorescent lamp. Referring to the first figure, a conventional cold cathode fluorescent lamp 丨 includes a tube 11, a phosphor layer 12 and an electrode pair 13. The lamp tube 11 has a cavity 16 inside and is filled with a discharge gas. The discharge gas includes an inert gas 16a and a mercury vapor 16b. The phosphor layer 12 is coated on the 5 r1336094- inner wall of the cavity 16 and the electrode pair 13 is respectively It is disposed at both ends of the cavity and is electrically connected to a power source (not shown). When the power source drives the electrode pair 13, the electrode pair 13 is discharged in the cavity 16, and the free electrons are accelerated by the high voltage electric field. During this process, the electrons collide with the inert gas 16a and the mercury vapor 16b to generate energy exchange. The mercury vapor 16b is excited to the excited state, and then returns to the ground state, while the mercury vapor 〖6b returns to the ground state, and the energy is released in the form of ultraviolet light, and the ultraviolet light is excited by the mercury vapor 16b. When the phosphor layer 12 of the inner wall is 16 , the phosphor layer 12 absorbs the radiant energy and emits visible light to achieve the purpose of illuminating. Please refer to the first B diagram, which is a partial schematic view of the phosphor layer of the first A diagram. The conventional phosphor layer 12 is applied to the inner wall of the cavity 16 in a multilayer structure in consideration of luminous efficiency and process characteristics. When the ultraviolet light is generated inside the cavity 16 and the phosphor layer 12 is excited, since the conventional phosphor layer 12 has a multi-layer structure, the bottom of the phosphor layer is less likely to be excited by ultraviolet light, that is, near the tube wall of the tube. The phosphor layer has a lower excitation rate, and as a result, the luminous efficiency of the cold cathode fluorescent lamp cannot be improved. Therefore, how to provide a cold cathode fluorescent lamp can effectively improve the luminance of light, which is one of the important issues today. SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a cold cathode fluorescent lamp capable of improving luminance. β 1336094 For the above or other purposes, the present invention provides a cold cathode fluorescent lamp comprising a tube, a phosphor layer, an electrode pair and a discharge gas. The lamp tube has a cavity, and the phosphor layer is disposed on the inner wall of the cavity. The upper fluorescent layer includes a plurality of fluorescent particles and ultraviolet light penetrating particles, and the electrode pair is disposed at both ends of the cavity, and the discharge gas is Filled in the cavity. According to a preferred embodiment of the invention, in the cold cathode fluorescent lamp, the external light penetrating particles are transparent to ultraviolet light having a wavelength ranging from about 14 nm to about 380 nm. According to a preferred embodiment of the invention, in the cold cathode fluorescent lamp, the material of the ultraviolet light penetrating particles is cerium oxide, aluminum oxide, cerium oxide, cerium oxide, cerium oxide, calcium oxide or a mixture thereof. According to a preferred embodiment of the invention, in the cold cathode fluorescent lamp, the shape of the ultraviolet light penetrating particles is circular, elliptical, irregular or elongated. A cold cathode fluorescent lamp according to a preferred embodiment of the present invention, wherein the discharge gas comprises an inert gas and a mercury vapor. A cold cathode fluorescent lamp according to a preferred embodiment of the present invention, wherein the inert gas comprises helium, argon, helium or neon. According to a preferred embodiment of the invention, there is provided a cold cathode fluorescent lamp, wherein the lamp tube is made of Ying glass, Cha Cha glass or iron-free chalcedony glass. According to the preferred embodiment of the present invention, the cold cathode camping lamp further includes two wires extending through the outside of the lamp tube and extending into the inner space of the lamp tube ς7. In a cold cathode fluorescent lamp according to a preferred embodiment of the present invention, one of the ends of the wires is connected to the electrodes and disposed in the internal space of the cavity. To achieve the above or other objects, the present invention further provides a cold cathode fluorescent lamp comprising a tube, a phosphor layer, an ultraviolet light transmissive film, an electrode pair and a discharge gas. The lamp tube has a cavity, and the phosphor layer is disposed on the inner wall of the cavity. The fluorescent layer has a plurality of depressed portions. The electrode pair is disposed at both ends of the cavity, and the discharge gas system is filled in the cavity. in vivo. A cold cathode fluorescent lamp according to a preferred embodiment of the present invention further includes an ultraviolet light transmissive film covering the phosphor layer. According to a preferred embodiment of the invention, in the cold cathode fluorescent lamp, the depressed portions are arranged continuously or discontinuously with each other. According to a preferred embodiment of the invention, in the cold cathode fluorescent lamp, the recessed portion has a circular shape, a rectangular shape or an arbitrary shape. A cold cathode fluorescent lamp according to a preferred embodiment of the present invention, wherein the phosphor layer comprises a plurality of phosphor particles and ultraviolet light penetrating particles. In summary, in the cold cathode fluorescent lamp of the present invention, the fluorescent layer includes a plurality of ultraviolet light penetrating particles or the fluorescent layer is covered with an ultraviolet light penetrating film. Therefore, the fluorescent layer at the bottom of the fluorescent layer The light particles can be sufficiently excited to "ensure" to increase the luminance of the cold cathode fluorescent lamp. The above and other objects, features, and advantages of the present invention will become apparent from the <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;
第二A圖繪示本發明一較佳實施例之冷陰極螢 光燈的結構不意圖及螢光層的局部示意圖。請參照第 二A圖，本實施例之冷陰極螢光燈2主要包括一燈管 21、一螢光層22以及一電極對23 ^燈管21為封閉管 體’其形狀不限於如第=A圖所繪示之圓柱形管體，其 他非圓柱縣_如是各财形餘結構、U形結構或 是不規則形狀結構，均在本發明圍 内部形成有-腔體26,在肝，…/燈官21 〇隹腔體20内注入有一放電氣 體，在本實_巾’放電氣料汞蒸氣27及惰性氣體 2二惰：氣體包括”、氬氣、氦氣、氣氣及其組合。 酸鹽玻例如疋石英麵、硼⑦玻璃或無鐵卿 冤極對23包括一陽極及 在本實施例中 及八〇， iw视汉一陰極， 係刀別設置於腔體26之兩㈣ .之兩端，且分別藉由導線2 4盥一 外邛電源（未繪示）電性連接。 '、 Φ ^ ^ 導線24係自燈管21的外 接。、1燈管21的内部空間與電極對23電性連 請繼續參閱第二A 以例如塗佈之方式設置 圖’螢光層22為多層結構，係 於腔體26之内壁上。值得注意 9 T336094 的是，本實施例之螢光層包括複數個螢光粒子221及複 數個透明的紫外光穿透粒子222，複數個紫外光穿透粒 子222係與螢光粒子221均勻地配置於螢光層22内。 本實施例之冷陰極螢光燈2在使用時，係將電極對23 之陽極及陰極分別電性連接至外接電源並產生偏壓，充 填於腔體26内部的放電氣體被激發至激發態，隨即再 回到基態，當放電氣體回到基態時以發射出紫外光的形 式釋放能量《由於本實施例之螢光層22具有透明的紫 外光穿透粒子222，因此，當放電氣體放射出紫外光並 激發螢光層22時’紫外光可以穿透紫外光穿透粒子222 並到達螢光層不同的角落及深度，同時亦可激發圍繞紫 外光穿透粒子222周圍的螢光粒子221，更甚之，紫外 ^ 了以穿透至螢光層22的底部。在本實施例中，紫外 光穿透粒子222可供波長範圍大約介於14〇nm至38〇nm 之間的紫外光穿透。 要說明的是，本實施例之紫外光穿透粒子222之材 質係為不吸收紫外光但可允許紫外光穿透，例如氧化矽 (Sl〇2 )、氧化鋁（Al2〇3 )、氧化鑭（La2〇3 )、氧化紀 (Y2〇3)、氧化錯（zr〇2)、氧化鈣（Ca2〇3)或其混合 物。睛繼續參閱第二A圖，紫外光穿透粒子222之形狀 例如是圓形、橢圓形或兩者之組合，當然，紫外光穿透 粒子222之形狀可為其他之幾何形狀，例如是長條型或 不規則形，如第二B圖所繪示。藉由長條形之紫外光穿 透粒子222a配置於勞光㉟22中，目此，紫外光可由長 1336094 條形之紫外光穿透粒子222a長邊之一端穿透入射，且 配置長條形之紫外光穿透粒子f 222a可使螢光層32的厚 J度增加’利用長條形狀將紫外光導引至更深層之螢光層 ,· 22中，以使更多的螢光粒子221被激發，因此，進而 、 有效地提高冷陰極燈管2的發光輝度。 第二實施命| 第二圖所績示為依據本發明之另一較佳實施例之 冷陰極螢光燈3的剖視圖，本實施例之冷陰極螢光燈3 藝與上述實施例之冷陰極榮光燈具有相似之結構。與上述 實施例不同之處在於，本實施例之螢光層32具有複數 個凹陷部321，凹陷部彼此之間係為連續設置或不連續 设置。凹陷部3 21形成的方式例如是利用一器具在螢光 層32上形成有複數個凹陷部32丨。在本實施例中，凹 陷部321可為圓形、矩形或任意形狀。凹陷部321係沿 冷陰極螢光燈3的長邊方向設置，螢光層的凹陷部321 φ 可有效地增加螢光層32的表面積’因此，進而有效地 提咼了冷陰極螢光燈3的發光效率。在本實施例中，更 包括一紫外光穿透膜35覆蓋於螢光層32上。更詳細地 k 說’紫外光穿透膜35係覆蓋於具有凹陷部321的螢光 -層32上。紫外光穿透膜35可使波長範圍大約介於 140nm至380nm之間的紫外光穿透，其材質係選自氧化 石夕、氧化鋁、氧化網、氧化紀、氧化錯、氧化轉及其組 合所構成的群組。藉由本實施例之紫外光穿透臈35, 放電氣體放射出紫外光時可以穿透紫外光穿透膜並激 11 1336094 發螢光層32，以產生·可見光。由於本實施例之螢光層 具有透明的紫外光穿透粒子，因此，可使螢光層32被 激發的表面積增加。另外，本實施例之紫外光穿透膜 35可提供螢光層32保護的作用，避免冷陰極螢光燈3 在使用過程中，螢光層32受到水銀及電漿的侵蝕而損 壞’如此一來’可有效地增加冷陰極螢光燈3的使用壽 命並提高冷陰極螢光整體發光輝度。 综上所述，本發明之冷陰極燈具有下列優點： 一、 於本發明之螢光層具有透明的紫外光穿透 粒子’因此’相較於習知技術’可使增加螢光層底部之 勞光粒子被激發，進而使冷陰極螢光燈的發光效率提 尚。 一、於本發明之螢光層具有凹陷部的設計，因此 可增加螢光層的面積，使冷陰極螢光燈整體的發光輝 度增加。 一 '再者’由於本發明之紫外光穿透膜，可使紫 =線穿透並可保護螢絲，使其避免受到電漿及水銀的 铋蝕，因此可有效地增加冷陰極燈管的使用壽命。 、雖然本發明已以較佳實施例揭露如上，然其並非 、限疋本發明，任何熟習此技藝者，在不脫離本發 ::精神和fe圍内，當可作些許之更動與潤飾’因此 ^明之保護範圍當視後附之中請專利範圍所界定 者為準。 【圖式簡單說明】 12 第一 A圖為一種@1 J· Λ 圖； ° \陰極螢光燈的結構示意 第一 Β圖為第一 Α圖之 第二Α圖及第圖為本螢光層一的局部示意圖； 陰極螢光燈的結構示意 月-較佳實施例之冷 以及 及螢先層的局部示意圖； 第三圖及第四圖為太政的 冷陰極螢光燈的剖視圖。另—種較佳實施例之 汞蒸氣 16b、27 導線 24 紫外光穿透膜 35 螢光粒子 221 紫外光穿透粒子 222'222a 凹陷部 321 【主要元件符號說明】 冷陰極營光燈 1、2、3 燈管 11、21 螢光層 12、22 電極對 13、23 腔體 16、26 惰性氣體 16a、28 13FIG. 2A is a schematic view showing the structure of a cold cathode fluorescent lamp according to a preferred embodiment of the present invention and a partial schematic view of the phosphor layer. Referring to FIG. 2A, the cold cathode fluorescent lamp 2 of the present embodiment mainly includes a lamp tube 21, a phosphor layer 22, and an electrode pair 23. The lamp tube 21 is a closed tube body. The shape thereof is not limited to the first= The cylindrical tube body shown in Figure A, other non-cylindrical county _ such as each of the financial shape structure, the U-shaped structure or the irregular shape structure, are formed inside the circumference of the invention with a cavity 26, in the liver, ... / Lamp official 21 〇隹 cavity 20 is injected with a discharge gas, in the actual _ towel 'discharge gas mercury vapor 27 and inert gas 2 two id: gas includes ”, argon, helium, gas and a combination thereof. The acid salt glass such as strontium quartz surface, boron 7 glass or iron-free bismuth electrode pair 23 includes an anode and in the present embodiment and the gossip, iw is a cathode of the Han, and the knife is disposed in the chamber 26 (four). The two ends are electrically connected by a power supply (not shown) of the wires 2, respectively. ', Φ ^ ^ The wire 24 is externally connected from the lamp tube 21. The internal space and the electrode of the 1 lamp tube 21 For the 23 electrical connection, please continue to refer to the second A. For example, the coating is provided. The fluorescent layer 22 has a multi-layer structure and is attached to the inner wall of the cavity 26. It is noted that in the T336094, the phosphor layer of the embodiment includes a plurality of phosphor particles 221 and a plurality of transparent ultraviolet light penetrating particles 222, and the plurality of ultraviolet light penetrating particles 222 and the phosphor particles 221 are uniform. The cold cathode fluorescent lamp 2 of the present embodiment is electrically connected to the external power source and biased by the anode and cathode of the electrode pair 23, and is filled in the cavity 26. The discharge gas is excited to the excited state, and then returns to the ground state, and the energy is released in the form of emitting ultraviolet light when the discharge gas returns to the ground state. Since the phosphor layer 22 of the present embodiment has transparent ultraviolet light penetrating particles 222 Therefore, when the discharge gas emits ultraviolet light and excites the phosphor layer 22, the ultraviolet light can penetrate the ultraviolet light to penetrate the particles 222 and reach different corners and depths of the phosphor layer, and can also excite the particles penetrating around the ultraviolet light. The phosphor particles 221 around 222, and more specifically, ultraviolet rays penetrate to the bottom of the phosphor layer 22. In the present embodiment, the ultraviolet light penetrating particles 222 are available in a wavelength range of about 14 〇 nm to 38. 〇nm Ultraviolet light penetration. It should be noted that the material of the ultraviolet light transmitting particles 222 of the present embodiment is such that it does not absorb ultraviolet light but allows ultraviolet light to penetrate, such as yttrium oxide (Sl〇2), aluminum oxide (Al2). 〇3), lanthanum oxide (La2〇3), oxidized (Y2〇3), oxidized (zr〇2), calcium oxide (Ca2〇3) or a mixture thereof. The eye continues to refer to Figure 2A, UV light wear The shape of the transparent particles 222 is, for example, a circle, an ellipse or a combination of the two. Of course, the shape of the ultraviolet light penetrating particles 222 may be other geometric shapes, such as a strip shape or an irregular shape, such as the second B pattern. The long-shaped ultraviolet light-transmitting particles 222a are disposed in the Luguang 3522. For this reason, the ultraviolet light can be incident through one end of the long side of the long-light ultraviolet light-transmitting particles 222a of the strip 1364094. The long strip of ultraviolet light penetrating particles f 222a can increase the thickness J of the phosphor layer 32. The long strip shape is used to guide the ultraviolet light to a deeper phosphor layer, 22, to make more flutter. Since the light particles 221 are excited, the luminance of the cold cathode fluorescent tube 2 is further effectively improved. The second embodiment shows a cross-sectional view of a cold cathode fluorescent lamp 3 according to another preferred embodiment of the present invention, the cold cathode fluorescent lamp 3 of the present embodiment and the cold cathode of the above embodiment. The glory lamp has a similar structure. The difference from the above embodiment is that the phosphor layer 32 of the present embodiment has a plurality of depressed portions 321 which are arranged continuously or discontinuously with each other. The depressed portion 3 21 is formed by, for example, forming a plurality of depressed portions 32 on the fluorescent layer 32 by means of an apparatus. In the present embodiment, the recessed portion 321 may be circular, rectangular or of any shape. The depressed portion 321 is disposed along the longitudinal direction of the cold cathode fluorescent lamp 3, and the depressed portion 321 φ of the fluorescent layer can effectively increase the surface area of the fluorescent layer 32. Therefore, the cold cathode fluorescent lamp 3 is effectively improved. Luminous efficiency. In this embodiment, an ultraviolet light transmissive film 35 is further covered on the phosphor layer 32. More specifically, k, the ultraviolet light transmitting film 35 is covered on the fluorescent layer 32 having the depressed portion 321. The ultraviolet light transmissive film 35 can penetrate ultraviolet light having a wavelength range of about 140 nm to 380 nm, and the material thereof is selected from the group consisting of oxidized oxidized stone, alumina, oxidized net, oxidized period, oxidized error, oxidized and combined The group formed. By the ultraviolet light penetrating the crucible 35 of the present embodiment, the discharge gas can penetrate the ultraviolet light through the film and excite the fluorescent layer 32 to generate visible light. Since the phosphor layer of this embodiment has transparent ultraviolet light penetrating particles, the surface area in which the phosphor layer 32 is excited can be increased. In addition, the ultraviolet light transmissive film 35 of the present embodiment can provide the protection of the fluorescent layer 32, and the fluorescent layer 32 can be damaged by the erosion of mercury and plasma during use of the cold cathode fluorescent lamp 3. The 'can effectively increase the service life of the cold cathode fluorescent lamp 3 and improve the overall luminance of the cold cathode fluorescent light. In summary, the cold cathode lamp of the present invention has the following advantages: 1. The phosphor layer of the present invention has transparent ultraviolet light penetrating particles 'so that it can increase the bottom of the phosphor layer compared to the prior art. The Luguang particles are excited to further improve the luminous efficiency of the cold cathode fluorescent lamp. 1. The phosphor layer of the present invention has a recessed portion design, so that the area of the phosphor layer can be increased, and the luminance of the entire cold cathode fluorescent lamp can be increased. Because of the ultraviolet light penetrating film of the present invention, the purple light can penetrate and protect the fluorescent wire from being eroded by the plasma and the mercury, thereby effectively increasing the cold cathode fluorescent lamp. Service life. Although the present invention has been disclosed in the above preferred embodiments, it is not limited to the present invention, and anyone skilled in the art can make some changes and refinements without departing from the present invention: spirit and fe Therefore, the scope of protection of the Ming Dynasty is subject to the definition of patent scope. [Simple description of the diagram] 12 The first A picture is a @1 J· Λ picture; The structure of the ° \ cathode fluorescent lamp is shown in Figure 1. The first picture is the first picture of the first picture and the picture is the first picture. A partial schematic view of the layer 1; a structure of the cathode fluorescent lamp; a schematic view of the cold and the first layer of the first layer of the preferred embodiment; and the third and fourth figures are cross-sectional views of the cold cathode fluorescent lamp of Taizheng. Another preferred embodiment of mercury vapor 16b, 27 wire 24 ultraviolet light penetrating film 35 fluorescent particles 221 ultraviolet light penetrating particles 222'222a recessed portion 321 [main component symbol description] cold cathode camping light 1, 2 , 3 lamps 11, 21 fluorescent layers 12, 22 electrode pairs 13, 23 chambers 16, 26 inert gases 16a, 28 13