200807482 #九、發明說明： 【發明所屬之技術領域】 本發明涉及-種場發射元件，尤其涉及—種場發 。 【先前技術】 & 場發射電子源以及糊該電子源轟_光物質*發光之場發 射發光技術已經在場發射平面顯示器等領域得到應用:這種= 射技術係於真空環境下，利用外加電場作用將尖端之電子激發出 籲來，電子轟擊榮光粉發出可見光從錢行顯示。於傳統場發㈣ =源中’-般採賴_金屬尖端祕尖端作為電子發射端，隨 著奈米技術之發展’最近縣用奈米碳管作為電子發射端^ 為工有效利用螢光粉之發光效率，像素管一般工作於1〇千伏 左右之尚壓下’惟，奈米碳管於強電塵下很容易損壞，導致發射 不穩定。 _ 【發明内容】 有鑒於此，提供-種可以於高塵下穩定工作之場發射元件實 為必要。 種場發射像素官，其包括：一個中空殼體，該中空殼體具 有出光部’該出光部之内壁依次設有一螢光層和一陽極層，所 述中二设體内部係真空密封的，該中空殼體内有一個金属筒，該 金屬筒内壁設有-層經固化之漿料層，該漿料於有導電之奈米 材料，該金屬筒與至少一個陰極電極電連接。 相較於先前技術，所述場發射像素管之金屬筒對電場有很強 之屏蔽作用，將含有奈米碳管之漿料塗於金屬筒之内壁作為陰 極，可有效減弱奈米碳管周圍之電場，使得奈米破管可以於10千 6 200807482 伏或更高之電壓下穩定之工作。 【實施方式] 以下將結合關對本發明作進-步詳細說明。 本實％例提供-種場發射像素管1G。請參賴^與圖2，該 琢發射像素官ίο包括：—個中空殼體u，該中空殼體η具有一 出光#12該出光部12之内壁依次設有—螢光層13和一陽極層 14，所ί中空殼體11内部係真空密封的’該中錢體U内有-個金屬筒I6’該金屬筒内壁設有一層經固化之裝料層口，該 聚料層Γ7 3有導電之奈米材料，該金屬筒π與至少一個陰極電 ^電連接。於本實施财該金屬Μ16分顺兩個陰極電極電連 接，該兩個陰極電極分別為第—陰極電極18和第二陰極電極19。 盘二t工设體11内部係真空密封的’於本實施例中，該殼體11 2工圓城，頭殼體11之樹軸英_或玻璃。可以理解 體11還可以係中空之多邊形棱柱，同時該殼體11之 以騎聽可叫柄鱗_，本職技術人員可 以根據實際情況進行選擇。 由白戶13沈侧光部12之内壁上。該螢光層13可以 螢光粉組成。當電子轟擊螢光層13時可發出 U WT見光。所述陽極層14鑛在 部12内虹並將#光層13覆 願域13之出先 作用。珊極層14If·1 ¥電亚反機絲發光之 Μ為金屬膜’具有良好之導電性和鏡 於本實施例中，該陽極層14為麵。 正又’ 於本實_中’所述金屬筒16為一圓筒，且 中心軸垂細林料__，糊筒 200807482 筒、多邊形筒等其他筒狀結構。 所述金屬筒16哺有一層經固化之 含有導電之奈米材料，所述奈米材料可以選^ ’絲料層17 棒、碳60，奈米碳顆粒、導電金屬或管、奈米碳 奈米棒’奈米帶及其混合物中之任意—種，—Ί官、奈米線、 碳管。將配好之漿料層17塗敷於金屬 例中選用奈米 後用橡皮雜金顧16内壁，使麵將其固化，最 露頭，增強其場發射性能。金屬筒^^ =中之奈米碳管 用取決於漿彻π邊雜金賴16邊==發顧之屏蔽作 蔽作用越強；還取決於金屬筒i 距離越大，屏 強。 k 1後越小，屏蔽作用越 所述金屬筒16分別與第一陰極電極 連接。該第-陰極電㈣與該第二陰極電極 亚延，至賴u外部。於第—陰極電極18和第二陰極電㈣穿 過之部位可採用玻璃封接技術密封，以保證殼體 15:=素管10進一步包括-個陽— /、-曰㈣連接㉜陽極電極^穿過所述殼體^延伸至嗖 體11外部’極電極15穿過之部位可__封接技術密封， 以保證殼體11内部之密封性。 =場發射像素管10進一步包括一吸氣劑2〇,用於吸附場發射 像素言10内殘餘氣體，維持場發射像素管⑽内部之真空度。該 吸乱劑20可以為蒸散型吸氣劑，於殼體11封接後通過高頻加熱 蒸鏡之方法形成於靠近第一陰極電極18和第二陰極電極之殼 體11内壁上。該吸氣劑2〇也可以為非蒸散型吸氣劑，固定於靠 8 200807482 定於全極18和第二陰極電極19之殼體11喊上，或者固 疋於金^16之内壁或外壁。 旌直^發射像素管10進一步包括一排氣孔21 ’該排氣孔21外 r發㈣/ U將殼體11抽真空。封裝時，先通過排氣孔21使 達到-㈣空度後再進行最後之封裝。 極雷極H射像素官10卫作時，分縣陽極電極15與第一陰 用，金屬Μ Ί二陰極電極19之間加上電壓軸電場，通過電場作 籲穿透陽極^ ^壁之聚料層17中之奈米碳管發射出電子，電子 出光部I2曰射中爲擊榮光層13 ’發出可見光。可見光一部分直接從 最終透過出光部陽極層14上。陽極層14將其反射並 可以進行照明或資訊顯示。♦樣之場發射像素管10排列起來 有很’所__像素管10之金屬筒16對電場 作為险極，則《將含有奈米碳管之裝料塗於金屬筒16之内壁 丢°、可以有效減弱奈米碳管 春可膽1G千伏或更高之下敎之珍 Τ、未石反吕 綜上所述，本發_合伽翻要件，爰依法提料利申請。 …以上㈣者僅為本發明之健實财式，本㈣之範圍並 以上述實財式為限，軌純转聽之人 發 神所作之_祕攸，編她梅細^内 【圖式簡單說明】 圖。圖1係本發明實施例提供之場發射像素管之剖面示意 圖2係本發料施例触之場發射像素管沿^中丑- 9 200807482 Π方向之截面示意圖。 【主要元件符號說明】 場發射像素管 10 殼體 11 出光部 12 螢光層 13 陽極層 14 陽極電極 15 金屬筒 16 漿料層 17 第一陰極電極 18 第二陰極電極 19 吸氣劑 20 排氣孔 21 10200807482 #九的发明说明: Technical Field of the Invention The present invention relates to a field emission element, and more particularly to field emission. [Prior Art] & field emission electron source and paste electron source _ light substance * illuminating field emission illuminating technology has been applied in field emission flat panel display and other fields: this = shooting technology is used in a vacuum environment, The electric field acts to excite the electrons at the tip, and the electron bombardment glory emits visible light from the money line. In the traditional field hair (four) = source in the '-like mining _ metal tip secret tip as the electron emission end, with the development of nanotechnology' recently the county carbon nanotubes as the electron emission end ^ for the effective use of fluorescent powder The luminous efficiency, the pixel tube generally works under the pressure of about 1 kV. However, the carbon nanotubes are easily damaged under strong electric dust, resulting in unstable emission. _ SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a field emission element that can work stably under high dust. The field emission pixel official includes: a hollow casing having a light exit portion, wherein the inner wall of the light exit portion is sequentially provided with a phosphor layer and an anode layer, and the middle portion of the body is vacuum sealed The hollow casing has a metal cylinder, and the inner wall of the metal cylinder is provided with a layer of a cured slurry layer, and the slurry is electrically connected to the nanometer material, and the metal cylinder is electrically connected to the at least one cathode electrode. Compared with the prior art, the metal tube of the field emission pixel tube has a strong shielding effect on the electric field, and the slurry containing the carbon nanotube is applied to the inner wall of the metal tube as a cathode, which can effectively weaken the surrounding of the carbon nanotube. The electric field allows the nanotube to work stably at 10,600,074,074 volts or higher. [Embodiment] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. The present example provides a field emission pixel tube 1G. Referring to FIG. 2 and FIG. 2, the 琢 emission pixel official ίο includes: a hollow casing η having a light output #12. The inner wall of the light exit portion 12 is sequentially provided with a fluorescent layer 13 and An anode layer 14 is vacuum-sealed inside the hollow body 11 and has a metal cylinder I6. The inner wall of the metal cylinder is provided with a layer of solidified charging layer, the polymer layer Γ7 3 has a conductive nano material, and the metal cylinder π is electrically connected to at least one cathode. In the present embodiment, the metal crucible 16 is electrically connected to two cathode electrodes, which are the first cathode electrode 18 and the second cathode electrode 19, respectively. The inside of the disk assembly 11 is vacuum-sealed. In the present embodiment, the housing 11 is a round, and the head housing 11 is a shaft or a glass. It can be understood that the body 11 can also be a hollow polygonal prism, and the housing 11 can be called a handle scale _, and the technician can select according to the actual situation. The white wall 13 is sunk on the inner wall of the side light portion 12. The phosphor layer 13 can be composed of phosphor powder. U WT sees light when electrons bombard the phosphor layer 13. The anode layer 14 is implanted in the portion 12 and the light layer 13 is pre-empted. The positive electrode layer 14If·1 is an electric sub-reflective wire which emits light and has a good electrical conductivity and a mirror. In the present embodiment, the anode layer 14 is a face. The metal cylinder 16 of the present invention is a cylinder, and the central axis is a fine forest material __, a paste tube 200807482, and other cylindrical structures such as a cylinder and a polygonal cylinder. The metal cylinder 16 is fed with a layer of solidified conductive nano-material, and the nano material can be selected as a silk layer, a rod, a carbon 60, a nano carbon particle, a conductive metal or a tube, and a nanocarbon. Any of the rice sticks' nanobelts and their mixtures, - eunuch, nanowire, carbon tube. Applying the prepared slurry layer 17 to the metal, the inner wall of the rubber is used, and the inner surface of the rubber is used to cure the surface, and the surface is solidified to enhance the field emission performance. The metal tube ^^ = the carbon nanotubes in the middle of the tube is dependent on the π-side of the π-side impurity 赖 赖 16 ======================================================== The smaller the k 1 is, the more the shielding effect is, the more the metal can 16 is connected to the first cathode electrode. The first cathode electric (four) and the second cathode electrode are sub-deferred to the outside of the ruthenium. The portion through which the first cathode electrode 18 and the second cathode electrode (4) pass may be sealed by a glass sealing technique to ensure that the shell 15:=the tube 10 further includes a cation-/,--(four) connection 32 anode electrode^ The portion through which the electrode portion 11 extends to the outside of the body 11 through which the electrode electrode 15 passes can be sealed by a sealing technique to ensure the sealing property inside the casing 11. The field emission pixel tube 10 further includes a getter 2 吸附 for adsorbing the residual gas in the field emission pixel 10 to maintain the vacuum inside the field emission pixel tube (10). The snubber 20 may be an escaping getter formed on the inner wall of the casing 11 adjacent to the first cathode electrode 18 and the second cathode electrode by a high frequency heating mirror after the casing 11 is sealed. The getter 2〇 may also be a non-evaporable getter fixed to the shell 11 of the all-pole 18 and the second cathode electrode 19, which is fixed on the inner wall or the outer wall of the gold electrode 16 . The illuminating pixel tube 10 further includes a venting opening 21' which is vented to the outside of the venting opening 21. In the case of packaging, the final package is performed after the vent hole 21 is reached to - (iv). When the pole-extreme H-pixel pixel officer 10 is used, the electric field of the voltage axis is applied between the anode electrode 15 of the county and the first cathode, the metal cathode, and the cathode electrode 19, and the electric field is used to penetrate the anode. The carbon nanotubes in the material layer 17 emit electrons, and the electron light exiting portion I2 emits visible light for the glory layer 13'. A portion of the visible light passes directly through the exit portion anode layer 14. The anode layer 14 reflects it and can be illuminated or displayed. ♦The field emission pixel tube 10 is arranged in a row. The metal tube 16 of the pixel tube 10 has a magnetic field as a dangerous pole, and then the coating containing the carbon nanotubes is applied to the inner wall of the metal cylinder 16, Can effectively weaken the carbon nanotubes of the spring can be 1G kV or higher under the Τ Τ Τ 未 未 Τ Τ Τ Τ Τ Τ Τ Τ 未 综 综 综 综 综 综 综 综 综 综 综 综 综 综 综 综 综 综 综 综 综... The above (4) are only the solid financial formula of the present invention. The scope of this (4) is limited to the above-mentioned real financial style, and the esoteric person who makes a pure turn to listen to the confession is composed of her secrets. Brief description] Figure. 1 is a schematic cross-sectional view of a field emission pixel tube according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of a field emission pixel tube of the present embodiment of the present invention along the 丑 ug - 9 200807482 Π direction. [Main component symbol description] Field emission pixel tube 10 Housing 11 Light exit portion 12 Luminous layer 13 Anode layer 14 Anode electrode 15 Metal tube 16 Slurry layer 17 First cathode electrode 18 Second cathode electrode 19 Getter 20 Exhaust Hole 21 10