200847222 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種螢光燈，特別關於一種平面螢光 燈。 【先前技術】 近年來，一般電視的顯示螢幕漸以液晶顯示面板 (LCD panel)為主流。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設置一背光模組 (backlight module)以提供光源，進而達到顯示的功能'。 市售電視之背光模組的光源係以多數的冷陰極管 、（CCFL)所組成，亦有使用發光二極體（LED)作:光源 者。然而，由於CCFL或LED係為線形或點狀光源， 因此都品要藉由为光模組中的擴散板，才能達到發光均 勻的效果。 由於液晶顯示面板尺寸日漸增大，對於背光模組發 • 光的均勻度要求亦愈來愈高。另有以電漿發光元件製成 的平面螢光燈，由於具有良好的發光效率以及均勻性， 可付合背光模組對於光均勻性的要求。 平面螢光燈是一種電漿發光元件，其主要是利用介 電層放電原理，產生二次電子，與氣體放電腔中陰極與 1%極之間的惰性氣體產生碰撞，並將氣體離子化激發以 形成電漿。之後，電漿中被激發的激態原子會以放射紫 外光的方式回到基態，而所放射之紫外光會進一步激發 平面螢光燈中的螢光體，以產生可見光。而平面螢光燈 200847222 之高發光效率一直是研發人員所追求的。 第1圖表示習知平面螢光燈的剖面圖。該平面螢光 燈主要包括一上基板11 ' 一下基板12及二螢光層.13、 W。上基板π與下基板12係相對而設，螢光層13、14 係分別覆蓋於上基板11與下基板12上。且螢光層13、 14之間係形成一氣體放電腔15，氣體放電腔填充有一 放電氣體151。 平面螢光燈更包含一電極對。電極對係由一第一電 極16及一第二電極17所構成，第一電極16及第二電 極17配置在下基板12上，其上覆蓋—介電们8用以 保護使得第-電極16及第二電極17不會因離子撞擊而 損壞。螢光層14係覆蓋於介電層18上。 在平面螢光燈的點亮過程中，主要是藉由第一電極 16及第二電極17發射電子與氣體放電腔15内部的放 電氣體151 |生碰撞，並將放電氣體151離子化、激 發以形成電漿。之後’電漿中被激發的激態原子合以放 射紫外光的方式回到基態，且所放射之紫外光會^一步 激發螢光層13、14，以產生可見光。 在平面螢光燈中，放電氣體151經離子化所形成之 電漿區域Α1如第i圖所示，其形狀係由第一電極Μ 至第二電極17類似拱形。電漿區域M與螢光層"之 間存在-高度Η，使得螢光層14受激發的程度曰不佳， 也因此限制了平面螢光燈的發光效率。 因此，如何提供—種平面螢光燈，能夠提高螢光層 200847222 受激發的程度’進而提升發光效率，實為當前重要課題。 【發明内容】 有鑑於上述課題，本發明之目的為提供一種能夠提 高螢光層受激發的程度，進而提升發光效率之平面螢 燈。 、、象疋，為達上述目的，依據本發明之一種平面螢光 燈包括一第一基板、至少一電極對、一第一螢光層、一 第二基板、一第二螢光層及一氣體放電腔。該電極對配 置於該：-基板上，且由一第一電極及一第二電極所組 成二該第-螢光層覆蓋於該第一基板上。該第二基板與 該第-基板相對而設。該第二螢光層覆蓋於該第二基板 且/、及第螢光層相對而設。該氣體放電腔形成於 :第光層與該第二勞光層之間且填充有一放電氣 於該第—電極及該第二電且㈣出部係位 發明之—種平面螢光燈之螢光層具有 部可m 部位於二電極之間，故本發明之突出 口P 了直接接觸到放雷裔雜 大巾Ho* a電體離子所形成之㈣區域，而 大中田螢光層受激發 發光效率。 x之釦度’進而如升平面螢光燈的 【實施方式】 、下將“、、相_目g，說明依據本發明較佳實施例 200847222 之一種平面螢光燈。 第一實施例 第2圖為依照本發明第一叙 立丨品同外τ 弟 例之平面螢光燈的 ^面圖。斜面螢紐包括—上基板21、—下基板22 im3、24。上基板21與下基板22係相對而 §又’營先層23、24係分別覆蓋於上基板2i、下基板22 ^榮光層23、24係相對而設’且其間係形成一氣體 放電腔25’氣體放電腔内係填充一放電氣體251。 平面螢光燈更包含一電極對。電極對係由一第一電 極26及一第二電極27所構成，且第-電極26及第二 電極27配置在下基板22ji。在本實施例中，第一電極 26及第二電極27配置於下基板22遠離營 4之一 表面。 此外，螢光層24具有一突出部241。突出部241 與榮光層23相對設置，且位於第—電極％及第二電極 27之間。 在第電極26及第二電極27通電後，第一電極 26及第一電極27發射電子與氣體放電腔25内部的放 電氣體251產生碰撞，並將放電氣體251離子化、激發 以形成電漿，如第2圖所示之電漿區域A2。接著，電 漿中被激發的激態原子會以放射紫外光的方式回到基 悲’且所放射之紫外光會進一步激發螢光層23、24, 以產生可見光。 由於榮光層24之突出部241可較為接近或直接接 200847222 觸電漿區域A2’而可增加螢光層的受激發面積，增進 發光效率。 ^ 第二實施仓1 第3圖為依照本發明第二實施例之平面螢光燈的 α〗面圖"亥平面螢光燈與第2圖所示之平面螢光燈類 似，兩者差異在於本實施例中之第一電極26及第二電 極37分別配置於下基板22之相對二表面，其中第二電 極37係位於下基板22靠近螢光層24之一面。一介電 •層38係覆蓋第二電極37以保護使得第二電極 合 因離子撞擊而損壞。 不曰 此外’螢光層24具有-突出部24卜與第一實施 例之突出部相同，故於此不再贅述。 第二實施例 第4圖為依照本發明第三實施例之平面榮光燈的 剖面圖。該平面螢光燈與上述實施例大致類似，唯一差 #異在於本實施例中之第一電極46及第二電極Ο配置於200847222 IX. Description of the Invention: [Technical Field] The present invention relates to a fluorescent lamp, and more particularly to a flat fluorescent lamp. [Prior Art] In recent years, the display screen of a general television has gradually adopted a liquid crystal display panel (LCD panel) as a mainstream. Since the liquid crystal display panel itself does not have the function of emitting light, a backlight module must be disposed under the liquid crystal display panel to provide a light source to achieve the display function. The backlight of the commercially available TV backlight module is composed of a plurality of cold cathode tubes (CCFLs), and a light-emitting diode (LED) is also used as a light source. However, since the CCFL or the LED is a linear or point-shaped light source, it is possible to achieve a uniform illumination effect by using a diffusion plate in the optical module. As the size of the liquid crystal display panel is increasing, the uniformity of the light emission of the backlight module is also increasing. In addition, the flat fluorescent lamp made of plasma light-emitting elements can meet the requirements of light uniformity of the backlight module because of its good luminous efficiency and uniformity. A flat fluorescent lamp is a plasma light-emitting element, which mainly uses a dielectric layer discharge principle to generate secondary electrons, collides with an inert gas between a cathode and a 1% pole in a gas discharge chamber, and ionizes the gas. To form a plasma. Thereafter, the excited excited atoms in the plasma return to the ground state by radiating ultraviolet light, and the emitted ultraviolet light further excites the phosphor in the planar fluorescent lamp to generate visible light. The high luminous efficiency of the flat fluorescent lamp 200847222 has always been pursued by researchers. Fig. 1 is a cross-sectional view showing a conventional flat fluorescent lamp. The planar fluorescent lamp mainly comprises an upper substrate 11 'the lower substrate 12 and two fluorescent layers .13, W. The upper substrate π is disposed opposite to the lower substrate 12, and the phosphor layers 13 and 14 are respectively covered on the upper substrate 11 and the lower substrate 12. A gas discharge chamber 15 is formed between the phosphor layers 13, 14 and the gas discharge chamber is filled with a discharge gas 151. The flat fluorescent lamp further includes an electrode pair. The electrode pair is composed of a first electrode 16 and a second electrode 17, and the first electrode 16 and the second electrode 17 are disposed on the lower substrate 12, and the overlying dielectric 8 is used to protect the first electrode 16 and The second electrode 17 is not damaged by the impact of ions. The phosphor layer 14 is overlying the dielectric layer 18. During the lighting process of the planar fluorescent lamp, the electrons emitted from the first electrode 16 and the second electrode 17 are collided with the discharge gas 151 inside the gas discharge chamber 15, and the discharge gas 151 is ionized and excited. Form a plasma. Thereafter, the excited atomic atoms excited in the plasma return to the ground state in such a manner as to emit ultraviolet light, and the emitted ultraviolet light emits the phosphor layers 13, 14 in one step to generate visible light. In the flat fluorescent lamp, the plasma region Α1 formed by ionization of the discharge gas 151 is as shown in Fig. i, and its shape is similarly arched from the first electrode 至 to the second electrode 17. The presence of a height Η between the plasma region M and the phosphor layer causes the phosphor layer 14 to be excited to a lesser extent, thereby limiting the luminous efficiency of the planar fluorescent lamp. Therefore, how to provide a kind of flat fluorescent lamp, which can increase the degree of excitation of the fluorescent layer 200847222 and further improve the luminous efficiency, is an important issue at present. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a planar fluorescent lamp capable of improving the degree of excitation of a phosphor layer and thereby improving luminous efficiency. In accordance with the present invention, a planar fluorescent lamp according to the present invention includes a first substrate, at least one electrode pair, a first phosphor layer, a second substrate, a second phosphor layer, and a Gas discharge chamber. The electrode pair is disposed on the substrate, and a first phosphor layer is formed on the first substrate by a first electrode and a second electrode. The second substrate is provided opposite to the first substrate. The second phosphor layer covers the second substrate and/or the phosphor layers are opposite to each other. The gas discharge chamber is formed between: the first light layer and the second light layer, and is filled with a discharge gas in the first electrode and the second electric (4) outlet portion of the invention The optical layer has a portion m which is located between the two electrodes, so that the protruding port P of the present invention directly contacts the (four) region formed by the Ho* a electric ion of the grazing moth, and the large midfield fluorescent layer is excited. Luminous efficiency. The buckle of x is further described as an embodiment of a flat fluorescent lamp, and the following is a description of a planar fluorescent lamp according to a preferred embodiment of the present invention 200847222. BRIEF DESCRIPTION OF THE DRAWINGS The figure is a plan view of a flat fluorescent lamp according to the first embodiment of the present invention. The beveled fluorescent button includes an upper substrate 21, a lower substrate 22 im3, 24. The upper substrate 21 and the lower substrate 22 Relatively, the ‘the first tiers 23 and 24 are respectively covered on the upper substrate 2i and the lower substrate 22, and the glory layers 23 and 24 are oppositely disposed, and a gas discharge chamber 25 is formed therebetween to fill the gas discharge cavity. A discharge gas 251. The planar fluorescent lamp further includes an electrode pair. The electrode pair is composed of a first electrode 26 and a second electrode 27, and the first electrode 26 and the second electrode 27 are disposed on the lower substrate 22ji. In the embodiment, the first electrode 26 and the second electrode 27 are disposed on a surface of the lower substrate 22 away from the camp 4. Further, the phosphor layer 24 has a protruding portion 241. The protruding portion 241 is opposite to the glory layer 23 and is located at the - between the electrode % and the second electrode 27. At the first electrode 26 and the second electrode 27 After being energized, the first electrode 26 and the first electrode 27 emit electrons to collide with the discharge gas 251 inside the gas discharge chamber 25, and ionize and excite the discharge gas 251 to form a plasma, as shown in FIG. Region A2. Next, the excited excited atoms in the plasma will return to the base sorrow by emitting ultraviolet light and the emitted ultraviolet light will further excite the phosphor layers 23, 24 to generate visible light. The protruding portion 241 can be relatively close to or directly connected to the 200847222 electric shock plasma region A2' to increase the excitation area of the fluorescent layer and improve the luminous efficiency. ^ Second implementation chamber 1 FIG. 3 is a plane according to the second embodiment of the present invention. The α-plane of the fluorescent lamp is similar to the planar fluorescent lamp shown in FIG. 2, and the difference is that the first electrode 26 and the second electrode 37 in the embodiment are respectively disposed under The opposite surfaces of the substrate 22, wherein the second electrode 37 is located on a side of the lower substrate 22 adjacent to the phosphor layer 24. A dielectric layer 38 covers the second electrode 37 to protect the second electrode from damage due to ion impact. Not bothering' The light layer 24 has the same projection as that of the first embodiment, and therefore will not be described again. Fig. 4 is a cross-sectional view of a planar glare lamp according to a third embodiment of the present invention. The planar fluorescent lamp is substantially similar to the above embodiment, and the only difference is that the first electrode 46 and the second electrode 本 in the embodiment are disposed on
反22靠近營光層24之一表面。—介電層H 係覆蓋第一電極46及第二電極47。 、 • 此外，螢光層24具有—突出部241，與第 例之突出部相同，故於此不再贅述。 蓋母實施例 第5圖為依照本發明第每 β弟四只施例之平面螢光燈的 =圖。該平面螢錢與第3圖所示之平面螢光燈大致 相同，而兩者之差異在於在本實施例中之下基板22之 200847222 下方更配置有-承載基板710’承載基板71〇可以一黏 著劑720與下基板22貼合，以支持該平面螢光燈。 第五實施例 第6圖為依照本發明第五實施例之平面螢光燈的 aj面圖4平面螢光燈與第2圖所示之平面營光燈大致 颏似而兩者之差異在於本實施例之平面螢光燈更包含 一反射層69,其係配置於榮光層24及下基板以之間， 並覆蓋在下基板22上，且使得螢光層24位於氣體放電 腔25及反射層69之間。反射層69具有一突出部691。 由於螢光層24覆蓋於反射層69，故螢光層24對應突 出部691係具有一突出部24卜且突出部Μ係覆蓋於 突出部691上，並形成於第一電極％及第二電極^之 間^由於突出部641可較接近或直接接觸電裝區域，而 I曰力螢光層24的又激發面積，使得螢光層受激發之 程度大幅提高’進而增進發光效率。另外，反射層69 可將螢光層叉紫外光照射而激發的可見光反射至上基 板21，而增進發光效率。 在本發明的實施例中，下基板22可為例如玻璃或 陶变的介電材料且厚度較佳為G.3_2mm;上基板21可 為例如玻璃的透明材料且厚度較佳為Ο.— ;電極 37 46、47係由銀、銅、ITO或IZO等導電 材料所製成且厚度較佳為 权彳土為3_50/z m ;螢光層23、24係 為！紫外光照射後可於 JI出了見先波長之材料且厚度較 為400 " m ;放電氣體25 i係為Xe、Ne、Ar、其他 200847222 惰性氣體、無汞氣體或其混合；介電層38、48係由pb〇、The reverse 22 is near the surface of one of the camping layers 24. The dielectric layer H covers the first electrode 46 and the second electrode 47. Further, the phosphor layer 24 has a protruding portion 241 which is the same as the protruding portion of the first example, and therefore will not be described again. The cover mother embodiment Fig. 5 is a view of the flat fluorescent lamp of the fourth embodiment of the present invention. The plane fluorescent money is substantially the same as the planar fluorescent lamp shown in FIG. 3, and the difference between the two is that in the present embodiment, under the 200847222 of the lower substrate 22, the carrier substrate 710' is further disposed on the carrier substrate 71. Adhesive 720 is attached to lower substrate 22 to support the planar fluorescent lamp. Fig. 6 is a view showing a plane of a flat fluorescent lamp according to a fifth embodiment of the present invention. The plane fluorescent lamp of Fig. 4 is substantially similar to the plane lamp shown in Fig. 2, and the difference therebetween is The planar fluorescent lamp of the embodiment further includes a reflective layer 69 disposed between the glory layer 24 and the lower substrate and covering the lower substrate 22 such that the phosphor layer 24 is located in the gas discharge chamber 25 and the reflective layer 69. between. The reflective layer 69 has a protrusion 691. Since the fluorescent layer 24 covers the reflective layer 69, the corresponding layer 691 of the fluorescent layer 24 has a protruding portion 24, and the protruding portion is covered on the protruding portion 691, and is formed on the first electrode and the second electrode. Between ^ because the protrusion 641 can be closer or directly in contact with the electrical installation area, and the excitation area of the I 萤 fluorescent layer 24, so that the degree of excitation of the luminescent layer is greatly improved', thereby improving the luminous efficiency. Further, the reflective layer 69 can reflect visible light excited by the ultraviolet light of the phosphor layer to the upper substrate 21, thereby improving luminous efficiency. In the embodiment of the present invention, the lower substrate 22 may be, for example, a glass or ceramic dielectric material and has a thickness of preferably G.3_2 mm; the upper substrate 21 may be a transparent material such as glass and preferably has a thickness of Ο. The electrodes 37 46, 47 are made of a conductive material such as silver, copper, ITO or IZO and have a thickness of preferably 3_50/zm for the weighted earth; the fluorescent layers 23 and 24 are for! After ultraviolet light irradiation, the material of the first wavelength can be obtained in JI and the thickness is more than 400 "m; the discharge gas 25 i is Xe, Ne, Ar, other 200847222 inert gas, mercury-free gas or a mixture thereof; dielectric layer 38 48 series by pb〇,
SiO2、B〗2〇3、陶瓷材料或其組合所構成且厚度較佳為 30-400#m;承載基板71〇可由玻璃或陶瓷材料所製 ， 成；黏著劑72〇可為玻璃膠、陶瓷膠、uv膠或熱固化 •膠；以及反射層69係以陶瓷材料或摻有Ti〇2、Al2〇3、SiO2, B 〇 2 〇 3, ceramic material or a combination thereof is formed and the thickness is preferably 30-400 #m; the carrier substrate 71 can be made of glass or ceramic material; the adhesive 72 〇 can be glass glue, ceramic Glue, uv glue or heat curing glue; and reflective layer 69 is made of ceramic material or doped with Ti〇2, Al2〇3,
BaS〇4等局反射率材料或其混合的陶瓷玻璃材料所構 成。 # 在本發明中，上下基板的邊緣可彼此黏合或以邊條 黏合以組成放電空間，且上下基板間的距離較佳為M〇 mm。上下基板間的距離可任意地以間隔物置於上下基 板間來維持，或以成型上板代替間隙物。 綜上所述，本發明之平面螢光燈之螢光層具有一突 出部’且突出部位於二電極之間，故本發明之突出部可 較為接近或直接接觸到放電氣體離子化所形成之電漿 區域，而可增加榮光層的受激發面積，使得螢光層受激 籲發之程度大幅提高，進而增進平㈣紐的發光效率。 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轉，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】 ，1圖為一種習知之平面螢光燈之剖面圖； 光 第2圖為依據本發明第一較 燈的剖面圖； ”之十面螢 200847222 弟3圖為依據本發明第 燈的剖面圖； 弟4圖為依據本發明第 燈的剖面圖； 苐5圖為依據本發明第 燈的剖面圖； 第6圖為依據本發明第 燈的剖面圖；以及 一較佳實施例之平面螢光 一車乂佳貫施例之平面螢光 四較佳實施例之平面螢光 五較佳實施例之平面螢光 第7圖為本發明之突出部的變化示意圖 元件符號說明·· Π、21 :上基板 12、22 :下基板 13、14、23、24 :螢光層 、25 :氣體放電腔 151、251 :放電氣體 16、 26、46 ··第一電極 17、 27、37、47:第二電極 18、 38、48 :介電層 241、691 :突出部 69 ··反射層 710 ·承載基板 720 :黏著劑A BaS〇4 or other such as a reflectance material or a mixed ceramic glass material. # In the present invention, the edges of the upper and lower substrates may be bonded to each other or bonded by side strips to constitute a discharge space, and the distance between the upper and lower substrates is preferably M 〇 mm. The distance between the upper and lower substrates can be arbitrarily maintained by placing the spacer between the upper and lower substrates, or by forming the upper plate instead of the spacer. In summary, the fluorescent layer of the planar fluorescent lamp of the present invention has a protruding portion and the protruding portion is located between the two electrodes, so that the protruding portion of the present invention can be relatively close or directly contacted by the ionization of the discharge gas. The plasma area can increase the excited area of the glory layer, so that the degree of stimulating of the luminescent layer is greatly increased, thereby improving the luminous efficiency of the flat (four) nucleus. The above is intended to be illustrative only and not limiting. Any changes or modifications that are made without departing from the spirit and scope of the invention are intended to be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional planar fluorescent lamp; FIG. 2 is a cross-sectional view of a first comparative lamp according to the present invention; Figure 4 is a cross-sectional view of a lamp according to the present invention; Figure 5 is a cross-sectional view of a lamp according to the present invention; Figure 6 is a cross-sectional view of a lamp according to the present invention; and a preferred embodiment Example of a plane fluorescent light, a planar image of a preferred embodiment, a planar fluorescent light, a planar fluorescent light, a preferred embodiment, a planar fluorescent light, a seventh embodiment of the present invention, a schematic diagram of the variation of the protruding portion of the present invention. Π, 21: upper substrate 12, 22: lower substrate 13, 14, 23, 24: fluorescent layer, 25: gas discharge chamber 151, 251: discharge gas 16, 26, 46 · · first electrode 17, 27, 37 47: second electrode 18, 38, 48: dielectric layer 241, 691: protrusion 69 · reflective layer 710 · carrier substrate 720: adhesive
Al、A2 :電漿區域 Η ··高度 12Al, A2: plasma area Η ··height 12