200839832 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— ’ 種可增進發光效率之冷陰極螢光燈。 1 【先前技術】 隨著產業日盈發達，行動電話、數位相機、筆 型電腦、桌上型電腦等數位化工具無不朝向更便利δ、 更多功能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= 螢幕可為使用者帶來更多的操作便利。近年來，大= 分的行動電話、數位相機、數位攝影機、筆記型電^ 以及桌上型電腦上之顯示螢幕皆以液晶顯示面= (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 cath〇de fluorescent lamp，CCFL ) 等。依背光源之位置不同，背光模組一般可分為侧光 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-圖，習知的冷陰極螢光燈！包括一燈管 n、一螢光層12及一電極對13。其中，燈管u内部具 有-腔體16並充填放電氣體，放電氣體包括—情性氣 體16a及求蒸氣16b，螢光層12係塗佈於腔體丨6的 200839832 内壁上，電極對13分別配置於腔體兩端，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l6a及汞蒸 氣16b碰撞並產生能量交換，汞蒸氣16t>即被激發至激 發態，隨即再回到基態，而汞蒸氣16b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l6b 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u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1的發200839832 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. 1 [Prior Art] With the development of the industry's daily surplus, digital tools such as mobile phones, digital cameras, pen computers, and desktop computers are all moving toward more convenient δ, more functions, and more beautiful directions. Display of these electronic products • The screen is an indispensable human-machine communication interface, and the display of the above products can provide more convenience for the user. In recent years, 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, due to the liquid crystal display panel itself. There is no function of illuminating, so 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 cath〇de 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. Please refer to the figure - the conventional cold cathode fluorescent lamp! A lamp tube n, a phosphor layer 12 and an electrode pair 13 are included. The lamp tube u has a cavity 16 filled with a discharge gas, the discharge gas includes an inert gas 16a and a vapor 16b, and the phosphor layer 12 is coated on the inner wall of the 200839832 of the cavity ,6, and the electrode pair 13 respectively It is disposed at both ends of the cavity and 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. In the process, the electrons collide with the inert gas 16a and the mercury vapor 16b to generate energy exchange. Mercury vapor 16t> is excited to the excited state, and then returns to the ground state, while the mercury vapor 16b returns to the ground state, releasing energy in the form of ultraviolet light, and the ultraviolet light excitation cavity released 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 wall of the tube u. The phosphor layer has a lower excitation rate, which leads to the development of the cold cathode fluorescent lamp 1.
光效率無法提昇。 X 因此，如何提供一種冷陰極螢光燈，可以有效地提 咼發光輝度，實為現今的重要課題之一。 【發明内容】 一種能夠提 有鑑於上述，本發明的目的是在提供 高發光輝度的冷陰極螢光燈。。 200839832 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。Light efficiency cannot be improved. X Therefore, how to provide a cold cathode fluorescent lamp can effectively improve the luminance of light, which is one of the important topics of today. SUMMARY OF THE INVENTION One object of the present invention is to provide a cold cathode fluorescent lamp having high luminance. . In order to achieve the above or other objects, the present invention provides a cold cathode fluorescent lamp 'comprising a lamp 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 phosphor layer comprises a plurality of phosphor particles and ultraviolet light penetrating particles, and the electrode pair is disposed at both ends of the cavity, and the discharge gas system Filled in the cavity.
依妝本發明較佳實施例所述之冷陰極螢光燈，其 中1外光牙透粒子可供波長範圍大約介於至 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 ^外光牙透粒子之材質係為氧化⑦、氧化銘、氧化 氧化釔、氧化锆、氧化鈣或其混合物。 中b依1、，叙明較佳實施例所述之冷陰極螢光燈，其 七^卜光牙透粒子之形狀係為圓形、橢圓形、不規 或長倏形。 依照 中放電⑽較佳實施例所述之冷陰極螢光燈，其 電孔體包括一惰性氣體及一汞蒸氣。 中惰：實施例所述之冷陰極螢光燈，其 成氣、氬氣、氦_氣。 中p’、u x明較佳實施例所述之冷陰極螢光燈，其 破螭。 、诉馮石央玻璃、硼矽玻璃或無鐵硼矽酸鹽 更—本么明較佳實施例所述之冷陰極螢光燈，苴 導線，係分別自燈管外部貫穿且延伸至燈管^ 7 200839832 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-燈管、—螢光層、—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 汉置於腔體之内壁上，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 中凹卩㈢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。 綜上所述，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 200839832 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。 【實施方式】 名一實施例 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 一 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，其形狀不限於如第二A圖所繪示之圓柱形管體，其 ，非圓柱形結構例如是各種方形柱狀結構、㈣結構或 疋不規則形狀結構，均在本發明之範圍内。在燈管21 m::腔體26’在腔體26内注入有一放電氣 28户例中’放電氣體為采蒸氣27及惰性氣體 卜2 Γ包括氤氣、氬氣、氦氣、沉氣及其組合。 二玻璃 如是石英玻璃、•夕玻璃或無鐵•夕 在本實施例中，電極對23包括—陽極及 係分別設置於腔鲈26 λ山 κ極’ 外端，且分料由導線24與一 Μ電源（未繪示）電性連接 部貫穿並延伸至燈瞢从〜 你目燈g 21的外 接。 燈& 21的内部空間與電極對23電性連 請繼續參閱第二A圖， ㈣如塗佈之方式設置_= 係 腔體26之内壁上。值得注意 200839832 的是，本實施例之螢光層包括複數個螢光粒子221及複 數個透月的|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均勾地配置於榮光層22内。 本實施例之冷陰極螢光燈2在使科，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廢，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^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㈣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22卜更甚之，紫外 光可以牙透至螢光層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^此爪至38〇nm 之間的紫外光穿透。 要说明的是，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 (Si〇2)、氧化I呂（ai2〇3)、氧化鑭（La2〇3)、氧化紀 (Y2〇3)、氧化锆（Zr〇2)、氧化鈣（Ca2〇3)或其混合 物。請繼續參閱第二A圖，紫外光穿透粒子222之形二 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配置於螢光層22中，因此，紫外光可由1 200839832 條形之紫外光穿透粒子222a長邊之一端穿透入射，且 配置長條开^之表外光穿透粒子222a可使榮光層w的厚 度增加，利用長條形狀將紫外光導引至更深層之榮光層 22中’^吏更多的榮光粒子221被激發，因此，進而 有效地提高冷陰極燈管2的發光輝度。 羞二實施例 第二圖所繪示為依據本發明之另一較佳實施例之 瞻冷陰極螢光燈3的剖視圖，本實施例之冷陰極螢光燈3 與上述貝她例之冷陰極螢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 設置。凹陷部321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321。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 • 可有效地增加螢光層32的表面積，因此，進而有效地 , 提高了冷陰極螢光燈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 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 矽、氧化鋁、氧化鑭、氧化釔、氧化鍅、氧化鈣及其組 合所構成的群組。藉由本實施例之紫外光穿透膜35， 放電氣體放射出紫外光時可以穿透紫外光穿透臈並激 200839832 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 κ 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。 綜上所述，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 I 粒子’因此，相較於習知技術，可使增加螢光層底部之 榮光粒子被激發，進而使冷陰極螢光燈的發光效率提 南0 二、 於本發明之螢光層具有凹陷部的設計，因此 可增加榮光層的面積，使冷陰極螢光燈整體的發光輝 度增加。 二 '再者’由於本發明之紫外光穿透膜，可使紫 · 夕=線牙透並可保護螢光層，使其避免受到電漿及水銀的 因此了有效地增加冷陰極燈管的使用壽命。 雖;、本發明已以較佳實施例揭露如上，然其並非 7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】 12 200839832 . 第一 A圖為一種習知之冷陰極螢光燈的結構示意 圖； 第一B圖為第一a圖之螢光層的局部示意圖； 第二A圖及第二B圖為本發明一較佳實施例之冷 陰極榮光燈的結構示意圖以及螢光層的局部示意圖； 以及 第三圖及第四圖為本發明之另一種較佳實施例之 冷陰極螢光燈的剖視圖。 【主要元件符號說明】 冷陰極螢光燈 1、2、3 汞蒸氣 16b 、 27 燈管 11、21 導線 24 榮光層 12、22 紫外光穿透臈 35 電極對 13、23 螢光粒子 221 腔體 16、26 紫外光穿透粒子 222、222a 惰性氣體 16a、28 凹陷部 321 13According to a preferred embodiment of the cold cathode fluorescent lamp of the preferred embodiment of the invention, the outer optically permeable particles are permeable to ultraviolet light having a wavelength in the range of about 380 nm. According to a preferred embodiment of the invention, in the cold cathode fluorescent lamp, the material of the external optically permeable particles is oxidized 7, oxidized cerium oxide, cerium oxide, zirconium oxide, calcium oxide or a mixture thereof. In the cold cathode fluorescent lamp of the preferred embodiment, the shape of the light-transparent particles is circular, elliptical, irregular or long-shaped. According to the cold cathode fluorescent lamp of the preferred embodiment of the medium discharge (10), the electroporation body comprises an inert gas and a mercury vapor. Neutral: The cold cathode fluorescent lamp of the embodiment, which is formed into gas, argon gas, and helium gas. In the case of p', u x the cold cathode fluorescent lamp of the preferred embodiment, which is broken. </ br> </ br> </ br> </ br> </ br> </ br> </ br> <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br> 200839832 Interior space. 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 'including a lamp tube, a phosphor layer, an ultraviolet light transmission film, an electrode pair, and a discharge gas. The lamp tube has a cavity, and the fluorescent layer is placed on the inner wall of the cavity. The fluorescent layer of the fluorescent layer has a plurality of depressed portions, and the electrode pairs are disposed at both ends of the cavity, and the discharge gas system is filled in Inside the cavity. The cold cathode fluorescent lamp according to the 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 concave 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, so that the fluorescent layer at the bottom of the fluorescent layer The light particles can be sufficiently excited. Thus, the luminance of the cold cathode fluorescent lamp can be improved. The above and other objects, features, and advantages of the present invention will become apparent from the <RTIgt; [Embodiment] Embodiment 1 FIG. 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 a phosphor layer. Referring to FIG. 1A, the cold cathode fluorescent lamp 2 of the present embodiment mainly comprises a lamp tube 21, a phosphor layer 22 and an electrode pair 23. The lamp tube 21 is a closed tube body, and the shape thereof is not limited to the cylindrical tube body as shown in FIG. 2A, and the non-cylindrical structure is, for example, various square columnar structures, (four) structures or 疋 irregular shape structures, both of which are It is within the scope of the invention. In the lamp 21 m:: cavity 26', a discharge gas is injected into the cavity 26. In the case of the household, the discharge gas is the steam 27 and the inert gas, including helium, argon, helium, and helium. Its combination. The second glass is made of quartz glass, glazed glass or iron-free. In the present embodiment, the electrode pair 23 includes an anode and a system respectively disposed at the outer end of the cavity λ mountain κ pole, and the material is divided by the wire 24 and the ΜThe power supply (not shown) is connected through the electrical connection and extends to the lamp 瞢 from the external connection of your head g 21 . The internal space of the lamp & 21 is electrically connected to the electrode pair 23. Please continue to refer to Fig. 2A, (4) Set as the coating method _= on the inner wall of the cavity 26. It is noted that in 200839832, the phosphor layer of the embodiment includes a plurality of phosphor particles 221 and a plurality of translucent outer light penetrating particles 222, and the plurality of ultraviolet light penetrating particles 222 and the phosphor particles 221 are hooked. The ground is disposed in the glory layer 22. In the cold cathode fluorescent lamp 2 of the present embodiment, the anode and the cathode of the electrode pair 23 are electrically connected to an external power source and generated to be waste, and the discharge gas filled in the cavity 26 is excited to an excited state, and then Returning to the ground state, when the discharge gas returns to the ground state, the energy is released in the form of emitting ultraviolet light. 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 the firefly. The light layer has different (4) and depth, and at the same time, it can also excite the fluorescent particles 22 around the ultraviolet light penetrating particles 222. Moreover, the ultraviolet light can penetrate the bottom of the fluorescent layer 22. In this embodiment, the ultraviolet light penetrating particles 222 are permeable to ultraviolet light having a wavelength in the range of approximately between about 100 mm and about 38 nm. It is to 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 pass through, such as yttrium oxide (Si〇2), oxidized Ilu (ai2〇3), and oxidation. Lanthanum (La2〇3), oxidized (Y2〇3), zirconia (Zr〇2), calcium oxide (Ca2〇3) or a mixture thereof. Referring to FIG. 2A, the shape of the ultraviolet light penetrating 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, for example, long. Strip or irregular shape, as shown in Figure B. The ultraviolet light transmitting particles 222a are disposed in the fluorescent layer 22 by the elongated ultraviolet light. Therefore, the ultraviolet light can be incident through one end of the long side of the ultraviolet light transmitting particles 222a of the 200839832 strip, and the long strip is opened. The extra-surface light penetrating particles 222a can increase the thickness of the glory layer w, and the ultraviolet light is guided to the deeper glory layer 22 by the strip shape, and more glory particles 221 are excited, thereby being effective. The luminance of the cold cathode lamp 2 is improved. The second embodiment of the present invention is 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-described example are shown. Fluorescent lamps have 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 321 is formed by, for example, forming a plurality of depressed portions 321 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 of the fluorescent layer can effectively increase the surface area of the fluorescent layer 32, thereby effectively improving the cold cathode fluorescent lamp 3 Luminous efficiency. In this embodiment, an ultraviolet light transmissive film 35 is further covered on the phosphor layer 32. In more detail, the ultraviolet light transmissive film 35 is coated 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 approximately 140 nm to 380 nm, and the material thereof is selected from the group consisting of cerium oxide, aluminum oxide, cerium oxide, cerium oxide, cerium oxide, calcium oxide, and combinations thereof. The group that is formed. With the ultraviolet light transmissive film 35 of the present embodiment, when the discharge gas emits ultraviolet light, it can penetrate the ultraviolet light and penetrate the phosphor 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 embodiment can provide the protection of the fluorescent layer 32, and the cold cathode fluorescent lamp 3 κ can be prevented from being damaged by the erosion of mercury and plasma during use. As a result, the service life of the cold cathode fluorescent lamp 3 can be effectively increased and the overall luminance of the cold cathode fluorescent light can be improved. In summary, the cold cathode lamp of the present invention has the following advantages: 1. The transparent layer of the present invention has transparent ultraviolet light penetrating I particles. Therefore, the phosphor layer can be added compared to the prior art. The glory particles at the bottom are excited to further improve the luminous efficiency of the cold cathode fluorescent lamp. The phosphor layer of the present invention has a recessed portion design, thereby increasing the area of the glory layer and making the cold cathode fluorescent lamp overall. The luminosity of the luminescence increases. The second 'further' is due to the ultraviolet light penetrating film of the present invention, which enables the violet ray to pass through the line and protect the phosphor layer from the plasma and mercury, thereby effectively increasing the cold cathode lamp. Service life. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any skilled person may make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims. [Simple description of the drawing] 12 200839832. The first A is a schematic view of a conventional cold cathode fluorescent lamp; the first B is a partial schematic view of the fluorescent layer of the first a; the second A and the second B is a schematic structural view of a cold cathode glory lamp and a partial schematic view of a phosphor layer according to a preferred embodiment of the present invention; and third and fourth figures are cold cathode fluorescent lamps according to another preferred embodiment of the present invention. Cutaway view. [Main component symbol description] Cold cathode fluorescent lamp 1, 2, 3 Mercury vapor 16b, 27 Lamp 11, 21 Conductor 24 Glare layer 12, 22 Ultraviolet light transmission 35 Electrode pair 13, 23 Fluorescent particle 221 cavity 16, 26 ultraviolet light penetrating particles 222, 222a inert gas 16a, 28 recessed portion 321 13