1330859 099年06月29日修正替換頁 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種場發射平面光源裝置，尤其涉及一種場 發射陰極。 【先前技術】 [0002] 平面光源在衆多領域均有廣泛應用，尤其是在資訊顯示 領域。包括液晶顯示在内之多種被動顯示技術都需要一 個能夠均勻發光之平面光源作為其主要部件。以往多是 採用光學方法處理得到一個均勻發光平面，比如液晶之 背光板就是採用一套光學系統將線光源散焦成一個平面 光源。 [0003] 請參閱第一圖，2004年6月16日公開之第02152111. 5號 中國大陸發明專利申請揭露一種應用於液晶顯示器之背 光源10。其包括發光二極體12、導光板14以及微透鏡16 。其中該導光板14包括一與該發光二極體12相對之光入 射面（未標示），該微透鏡16設置於該發光二極體12與該 導光板14入射面之間，且該發光二極體12與該導光板14 分別定位於該微透鏡16兩側之工作距離内，從而使得該 微透鏡16耦合該發光二極體12出射之發散光以均勻之平 行光自入射面入射至導光板14，該導光板14耦合該平行 光自一平行光自一平面均勻入射。 [0004] 另，採用導光板等元件將線光源轉化為平面光源之相關 技術還可參見2002年10月23日公開之、標題為“光管、 平面光源元件及發射式液晶顯示裝置”之第021 07375. 9 號中國大陸發明專利申請、以及2004年2月11日公開之、 093122082 表單編號A0101 第3頁/共17頁 0993230901-0 1330859 099年06月29日核正番换頁 標題為“平面光源裝置及以其作背光模組之液晶顯示器 ”之第021 28659.0號中國大陸發明專利申請等文獻。 [0005] 然而，採用這種轉化方式工作之平面光源裝置無法直接 得到平面光，必須進行後續之光學處理來得到。並且， 還需要裝配經過精密加工之光學部件，如上述之微透鏡 、導光板等，從而增加該部分光學部件之費用，使得生 產成本提高。 [0006] 目前，業界也有利用場發射效應來製造光源裝置。其主 要工作原理在於：當陰極處於比陽極或柵極低之電位時 ，陰極表面有指向陽極或栅極之電場，若電場強度足夠 ，陰極開始發射電子，這些電子在陽極電場之作用下到 達陽極，轟擊附著於陽極之螢光粉，從而使螢光粉發生 能級躍遷而發光。相對於以往之技術，特別是日光燈管 ，這種場發射光源只需將陰陽極之間抽成真空，而不須 充入任何氣體，如汞等有害氣體，不會造成對環境之污 染。 [0007] Vitaly等在1999年12月28日公告之第6, 008, 575號美國 專利中揭示了一種採用場發射陰極之光源裝置，該場發 射陰極包括一基體及由該基體延伸之複數發射體。惟， 該光源裝置為一管狀裝置，僅能提供線光源，仍然無法 直接提供平面光。 [0008] 有鑑於此，提供一種能直接提供平面光之場發射平面光 源裝置及其陰極實為必要。 【發明内容】 093122082 表單編號A0101 第4頁/共17頁 0993230901-0 1330859 ____ 099年06月29日修正替换頁 麵為解決習知技射光源|置無法直接提供平面光之問題 ，本發明之目的在於提供一種能直接提供平面光之場發 射平面光源裝置及其陰極。 _]對應於該發明目的之-方面，本發明提供__種場發射平 面光源裝置，包括一具有複數發射體之陰極。其中，該 陰極進-步包含有若干導電承載柱，該發射體分佈於該 若干導電承載柱。 [0011]該裝置可進一步包括一與該陰極相對之陽極。 闺另，該裝置也可進-步包括兩個陽極，該陰極位於該兩 陽極之間。 闺纟中，上述發射體形成於面對陽極之導電承載柱表面， 其材料可選自金屬、非金屬、化合物和—維奈米材料。 該發射體具有-末端，其最好沿該導電承載柱表面之法 線朝向背離該導電承載柱之方向。上述若干導電承載柱 可為圓柱型或棱柱型，最好平行分佈於同一平面。最好 於至少-個導電承載柱之端部設置拉伸裝置。上述陰極 和陽極之間可進一步設置柵極。 _4]對應於該發明目的之m，本發明還提供—種場發 射陰極，其包括一基體和形成於該基體之複數發射體。 其中，該基體包括若干並行排列之導電承載柱。該導電 承載柱分佈有該發射體。 [0015] 相對於習知技術，本發明將若干分佈有發射體之導電承 載柱並行排列組成陰極發射體陣列，由發射體在電場作 用下發射電子轟擊陽極螢光層使其發光，從而無需另外 093122082 表單編號A0101 第5頁/共17頁 0993230901-0 1330859 099年06月29日修正替換頁 之光學元件進行光學處理而直接提供平面光。 [0016] 同時，當發射體沿導電承載柱表面之法線方向排佈時， 發射體之間之屏蔽效應將顯著降低，從而提高場發射陰 極之電子發射效率，提高光電轉化效率，改善整個光源 裝置之性能。另，本發明還提出在導電承載柱之一端或 兩端採用彈箐等拉伸裝置予以拉緊固定，一方面可保證 電子發射之均勻性，另一方面使其更為穩固，進而增長 整個光源裝置之使用壽命。 【實施方式】 [0017] 下面將結合附圖對本發明作進一步之詳細說明。 [0018] 請一併參閱第二至四圖，本發明之第一實施例為一種單 面型場發射平面光源裝置8。其包括一底板80、一陰極81 和一陽極8 2。三者基本相互平行，四個側面由玻璃封接 ，並抽成真空狀態。 [0019] 其中，底板80與陽極82之間設有若干玻璃柱84用於支撐 整個裝置8。底板80兩端還設有陰極固定板89，用於固定 陰極81。 [0020] 陰極81包括複數導電承載柱812和複數發射體（圖未示）。 該發射體均勻分佈於各導電承載柱812相對於陽極82之表 面上。其用於發射電子之末端背離該導電承載柱812，且 最好沿該導電承載柱表面之法線方向分佈，以降低發射 體間之屏蔽效應。該複數導電承載柱81 2為圓柱型，按一 定間隔均勻排列，相互平行，組成一陰極發射體陣列。 最好各導電承載柱812形狀、尺寸均一致，並且其中心軸 093122082 表單編號A0101 第6頁/共17頁 0993230901-0 I33Q859 099年06月29日修正替換頁 基本分佈於同一平面，因此可近似看作一電子發射平面 。陰極引線85設於陰極81之一侧，分別與各導電承載柱 812之一末端相連。 [0021] 陽極82為一塊表面形成有透明導電膜（未標示）和螢光層 83之平板玻璃。其中，螢光層83可含有紅、綠、黃三色 螢光粉，並最好對應於陰極81的各導電承載柱812的位置 ，呈條形分佈〇另外，螢光層83也可含有白色螢光粉， 覆蓋於陽極82相對陰極81的整個表面。陽極82之一側還 設有與透明導電膜相連之陽極引線86。需注意的是，該 裝置8之亮度將主要取決於陽極82之電壓和電流密度以及 螢光粉之發光效率等因素，可根據不同使用需要，做適 當安排。 [0022] 該裝置8之一侧壁玻璃上開有排氣孔（未標示），並連接有 一排氣管87。該排氣管87之内壁上放置有一消氣劑88， 用以維持裝置8内之真空度。 ' [0023] 在本實施例中，導電承載柱812為細絲結構。發射體通過 電泳或化學氣相沈積等方法形成在導電承載柱812之表面 。將這些形成有發射體之導電承載柱812排列均勻地固定 在陰極固定板89上，從而形成陰極81。當然，還可先將 圓柱形導體812在一基板上排列固定，再採用上述方法在 該導電承載柱812上形成該發射體》 [0024] 同時，該發射體可為各種微尖結構，包括金屬尖、非金 屬尖、化合物尖和一維奈米材料，例如鎢尖、鉬尖、矽 尖、金剛石尖、氧化鋅尖等。其中一維奈米材料包括各 093122082 表單編號A0101 第7頁/共17頁 0993230901-0 1330859 [0025] [0026] [0027] [0028] [0029] L099年 06月 種奈米級之管狀結構、棒狀結構和線狀結;如奈米^~~—-— 管、矽線、鉬線等。 應指出的是，陰極81和陽極82之間可根據需要加設柵極 ，例如光刻成型之金屬網格，以提高陰極81之電子發射 效率。 請一併參閱第五至七圖’本發明之第二實施例為一種雙 面型場發射平面光源裝置9。其與前一實施例之主要不同 之處在於：該裝置9包括兩個陽極90及92，陰極91位於該 兩陽極90及92之間，組成陰極91之各導電承載柱912面 對陽極90及92之兩側表面上均形成有發射體（圖未示）。 另，在本實施例中，導電承載柱912之一端由一彈蒉94固 定於陰極固定板（未標示）’以拉緊該導電承載柱912，使 其不易彎曲’從而使這些導電承載柱912能更好地位於同 —平面上。可選擇的是’可在導電承載柱912之兩端均設 置彈簧94，以增強拉緊效果。 本領域普通技術人員可以理解的是，所述之導電承載柱 除已指出之圓柱型外’還可為其他類型之权體結構，如 四棱fe '五棱柱或不規則多邊形柱體，而不必以具體實 施例為限。並且，還可採用其他元件或裝置來拉緊導電 承載柱，而不必僅限於彈簧。另，導電承載柱之數量、 固定方式以及陰陽極引線之排佈位置等均可根攄實際需 要加以變化。當然，這些依據本發明精神所做之變化， 都應包含在本發明所要求保護之範圍之内。 本發明將若干分佈有發射體之導電承載柱並行排列組成 093122082 表單編號A0101 第8頁/共17頁 0993230901-0 1330859 . « 099年06月29日修正替換頁 陰極發射體陣列，由發射體在電場作用下發射電子轟擊 陽極螢光層使其發光，從而無需另外之光學元件進行光 學處理而直接提供平面光。 [0030] 同時，當發射體沿導電承載柱表面之法線方向排佈時， 發射體之間之屏蔽效應將顯著降低，從而提高場發射陰 極之電子發射效率，提高光電轉化效率，改善整個光源 裝置之性能。另，本發明還提出在導電承載柱之一端或 兩端採用彈簧等拉伸裝置予以拉緊固定，一方面可保證 電子發射之均勻性，另一方面使其更為穩固，進而增長 整個光源裝置之使用壽命。 [0031] 綜上所述，本發明確已符合發明專利要件，爰依法提出 專利申請。惟，以上所述者僅為本發明之較佳實施例， 舉凡熟悉本案技藝之人士，於援依本案發明精神所作之 等效修飾或變化，皆應包含於以下之申請專利範圍内。 【圖式簡單說明】 [0032] 第一圖為習知之應用於液晶顯示器之平面光源裝置之示 意圖； [0033] 第二圖為本發明提供之單面型場發射平面光源裝置之立 體不意圖， [0034] 第三圖為沿第二圖中m-m線之剖視圖； [0035] 第四圖為沿第二圖中IV-IV線之剖視圖； [0036] 第五圖為本發明提供之雙面型場發射平面光源裝置之立 體示意圖； 093122082 表單編號A0101 第9頁/共17頁 0993230901-0 1330859 099年06月29日按正替換頁 [0037] 第六圖為沿第五圖中VI-VI線之剖視圖； [0038] 第七圖為沿第五圖中W-W線之剖視圖。 【主要元件符號說明】 [0039] 單面型場發射平面光源裝置： [0040] 雙面型場發射平面光源裝置： [0041] 底板：80 [0042] 陰極：81，91 [0043] 陽極：82, 90, 92 [0044] 螢光層：83 [0045] 玻璃柱：84 [0046] 陰極引線：85 [0047] 陽極引線：86 [0048] 排氣管：87 [0049] 消氣劑：88 [0050] 陰極固定板：89 [0051] 彈簧：94 [0052] 導電承載柱：812, 912 093122082 表單编號A0101 第10頁/共17頁 0993230901-01330859 Revision of the replacement page on June 29, 099. Description of the Invention: [Technical Field] [0001] The present invention relates to a field emission planar light source device, and more particularly to a field emission cathode. [Prior Art] [0002] Planar light sources are widely used in many fields, especially in the field of information display. A variety of passive display technologies, including liquid crystal displays, require a planar light source that emits light uniformly as its main component. In the past, optical methods were used to obtain a uniform light-emitting plane. For example, a liquid crystal backlight panel uses an optical system to defocus a line source into a planar light source. [0003] Please refer to the first figure, No. 02152111, published on Jun. 16, 2004. The Chinese mainland patent application discloses a back light source 10 applied to a liquid crystal display. It includes a light emitting diode 12, a light guide plate 14, and a microlens 16. The light guide plate 14 includes a light incident surface (not labeled) opposite to the light emitting diode 12, and the microlens 16 is disposed between the light emitting diode 12 and the incident surface of the light guide plate 14, and the light emitting diode The polar body 12 and the light guide plate 14 are respectively positioned within the working distance of the two sides of the microlens 16 , so that the microlens 16 is coupled to the divergent light emitted by the light emitting diode 12 to uniformly and parallelly enter the light from the incident surface. The light guide plate 14 is coupled to the parallel light from a plane to be uniformly incident from a plane. [0004] In addition, a related art for converting a line source into a planar light source by using a light guide plate or the like can also be referred to the disclosure entitled "Light Pipe, Planar Light Source Element, and Emission Liquid Crystal Display Device" disclosed on October 23, 2002. 021 07375. No. 9 application for Chinese invention patents, and published on February 11, 2004, 093122082 Form No. A0101 Page 3 of 17 0993230901-0 1330859 On June 29, 2008, the title of the page was changed to " A planar light source device and a liquid crystal display using the same as a backlight module, the Chinese Patent Application No. 021 28659.0, and the like. [0005] However, a planar light source device operating using such a conversion method cannot directly obtain planar light and must be obtained by subsequent optical processing. Further, it is also necessary to assemble precision-machined optical components such as the above-described microlenses, light guide plates, etc., thereby increasing the cost of the optical components and increasing the production cost. [0006] At present, the industry also uses the field emission effect to manufacture a light source device. The main working principle is that when the cathode is at a lower potential than the anode or the gate, the surface of the cathode has an electric field directed to the anode or the gate. If the electric field strength is sufficient, the cathode starts to emit electrons, and the electrons reach the anode under the action of the anode electric field. The bombardment of the phosphor powder attached to the anode causes the phosphor powder to undergo an energy level transition and emit light. Compared with the prior art, especially the fluorescent tube, the field emission light source only needs to draw a vacuum between the anode and the cathode, and does not need to be filled with any gas, such as harmful gases such as mercury, and does not cause environmental pollution. [0007] A light source device employing a field emission cathode is disclosed in U.S. Patent No. 6,008,575, the entire disclosure of which is incorporated herein by reference. body. However, the light source device is a tubular device that can only provide a line source and still cannot directly provide planar light. In view of the above, it is necessary to provide a field emission planar light source device capable of directly providing planar light and a cathode thereof. SUMMARY OF THE INVENTION 093122082 Form No. A0101 Page 4 of 17 0993230901-0 1330859 ____ On June 29, 1999, the replacement page is a solution to the problem that the planar light can not be directly provided. The object is to provide a field emission planar light source device capable of directly providing planar light and a cathode thereof. _] Corresponding to the aspect of the object of the invention, the invention provides a field emission planar light source device comprising a cathode having a plurality of emitters. Wherein, the cathode step comprises a plurality of conductive carrying columns, and the emitter is distributed on the plurality of conductive carrying columns. [0011] The apparatus can further include an anode opposite the cathode. Alternatively, the apparatus may further comprise two anodes, the cathode being located between the two anodes. In the crucible, the emitter is formed on the surface of the conductive carrying column facing the anode, and the material thereof may be selected from the group consisting of a metal, a non-metal, a compound, and a Venom material. The emitter has a - end which preferably faces away from the conductive support post along the normal to the surface of the conductive support post. The plurality of conductive support columns may be cylindrical or prismatic, preferably distributed in parallel on the same plane. Preferably, a stretching device is provided at the end of at least one of the electrically conductive carrying columns. A gate may be further disposed between the cathode and the anode. _4] In accordance with the object of the invention, the invention also provides a field emission cathode comprising a substrate and a plurality of emitters formed on the substrate. Wherein, the substrate comprises a plurality of conductive carrying columns arranged in parallel. The conductive carrying column is distributed with the emitter. [0015] Compared with the prior art, the present invention arranges a plurality of conductive carrying columns distributed with emitters in parallel to form a cathode emitter array, and the emitter emits electrons under the action of an electric field to bombard the anode fluorescent layer to emit light, thereby eliminating the need for another 093122082 Form No. A0101 Page 5 of 17 0993230901-0 1330859 On June 29, 2008, the optical components of the replacement page were optically processed to provide direct planar light. [0016] Meanwhile, when the emitters are arranged along the normal direction of the surface of the conductive bearing column, the shielding effect between the emitters is significantly reduced, thereby improving the electron emission efficiency of the field emission cathode, improving the photoelectric conversion efficiency, and improving the entire light source. The performance of the device. In addition, the present invention also proposes that one end or both ends of the conductive bearing column is tensioned and fixed by using a stretching device such as a magazine, on the one hand, the uniformity of electron emission can be ensured, on the other hand, it is more stable, thereby increasing the entire light source. The service life of the device. [Embodiment] The present invention will be further described in detail below with reference to the accompanying drawings. [0018] Referring to Figures 2 to 4 together, the first embodiment of the present invention is a single-sided field emission planar light source device 8. It includes a bottom plate 80, a cathode 81 and an anode 8 2 . The three are basically parallel to each other, and the four sides are sealed by glass and evacuated. [0019] There are a plurality of glass columns 84 between the bottom plate 80 and the anode 82 for supporting the entire device 8. A cathode fixing plate 89 is further provided at both ends of the bottom plate 80 for fixing the cathode 81. [0020] The cathode 81 includes a plurality of conductive carrying posts 812 and a plurality of emitters (not shown). The emitter is evenly distributed on the surface of each of the conductive support posts 812 relative to the anode 82. The ends for emitting electrons are directed away from the conductive support post 812 and are preferably distributed along the normal direction of the surface of the conductive support post to reduce the shielding effect between the emitters. The plurality of conductive carrying columns 81 2 are cylindrical and uniformly arranged at regular intervals and parallel to each other to form an array of cathode emitters. Preferably, each of the conductive carrying posts 812 has the same shape and size, and its central axis 093122082 Form No. A0101 Page 6 of 17 0993230901-0 I33Q859 The revised replacement page is basically distributed on the same plane, so it can be approximated Think of an electron emission plane. Cathode leads 85 are provided on one side of the cathode 81 and are respectively connected to one end of each of the conductive carrying posts 812. [0021] The anode 82 is a flat glass having a surface on which a transparent conductive film (not shown) and a fluorescent layer 83 are formed. The phosphor layer 83 may contain red, green, and yellow fluorescent powders, and preferably corresponds to the positions of the conductive carrying columns 812 of the cathode 81, and has a strip shape. In addition, the fluorescent layer 83 may also contain white. The phosphor powder covers the entire surface of the anode 82 with respect to the cathode 81. One side of the anode 82 is also provided with an anode lead 86 connected to a transparent conductive film. It should be noted that the brightness of the device 8 will mainly depend on factors such as the voltage and current density of the anode 82 and the luminous efficiency of the phosphor powder, and may be appropriately arranged according to different use requirements. [0022] One side of the device 8 has a vent hole (not shown) on its side glass and is connected to an exhaust pipe 87. A getter 88 is placed on the inner wall of the exhaust pipe 87 to maintain the degree of vacuum in the device 8. [0023] In the present embodiment, the conductive carrying post 812 is a filament structure. The emitter is formed on the surface of the conductive carrier 812 by electrophoresis or chemical vapor deposition. The conductive carrying columns 812 formed with the emitters are uniformly fixed to the cathode fixing plate 89, thereby forming the cathode 81. Of course, the cylindrical conductor 812 may be first aligned on a substrate, and the emitter is formed on the conductive carrying post 812 by the above method. [0024] Meanwhile, the emitter may be various microtip structures, including metal. Tip, non-metallic tips, compound tips and one-dimensional nanomaterials, such as tungsten tips, molybdenum tips, tips, diamond tips, zinc oxide tips, and the like. The one-dimensional nano-material includes 093122082, the form number A0101, the seventh page, the total of 17 pages, 0993230901-0, 1330859, [0028] [0029] [0029] L099 June, the nano-scale tubular structure, Rod-like structures and linear knots; such as nanometers~~~---tubes, tantalum lines, molybdenum lines, etc. It should be noted that a gate, such as a photolithographically formed metal grid, may be added between the cathode 81 and the anode 82 to increase the electron emission efficiency of the cathode 81. Referring to Figures 5 to 7, the second embodiment of the present invention is a double-sided field emission planar light source device 9. The main difference from the previous embodiment is that the device 9 includes two anodes 90 and 92. The cathode 91 is located between the two anodes 90 and 92. The conductive carrying columns 912 constituting the cathode 91 face the anode 90 and Emitters (not shown) are formed on both sides of the surface of 92. In addition, in this embodiment, one end of the conductive carrying column 912 is fixed to the cathode fixing plate (not labeled) by a magazine 94 to tension the conductive carrying column 912 to make it difficult to bend, so that the conductive carrying columns 912 Can be better located on the same plane. Alternatively, a spring 94 may be provided at both ends of the conductive carrying post 912 to enhance the tensioning effect. It will be understood by those skilled in the art that the conductive load-bearing column may be other types of weight structures other than the cylindrical type already indicated, such as a quadrangular 'pentagonal prism' or an irregular polygonal cylinder, without It is limited to the specific embodiment. Also, other components or devices may be used to tension the conductive carrier column without necessarily being limited to springs. In addition, the number of conductive load-bearing columns, the manner of fixing, and the arrangement of the anode and cathode leads can be changed according to actual needs. Of course, these changes in accordance with the spirit of the invention are intended to be included within the scope of the invention as claimed. The invention arranges a plurality of conductive carrying columns distributed with emitters in parallel to form 093122082 Form No. A0101 Page 8 / Total 17 pages 0993230901-0 1330859 . « Modified the replacement page cathode emitter array on June 29, 099, by the emitter Under the action of an electric field, the electron-emitting bombards the anode fluorescent layer to emit light, thereby directly providing planar light without additional optical components for optical processing. [0030] Meanwhile, when the emitters are arranged along the normal direction of the surface of the conductive bearing column, the shielding effect between the emitters is significantly reduced, thereby improving the electron emission efficiency of the field emission cathode, improving the photoelectric conversion efficiency, and improving the entire light source. The performance of the device. In addition, the present invention also proposes that one end or both ends of the conductive bearing column are tensioned and fixed by using a stretching device such as a spring, on the one hand, the uniformity of electron emission can be ensured, on the other hand, it is more stable, thereby increasing the entire light source device. The service life. [0031] In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS [0032] The first figure is a schematic diagram of a conventional planar light source device applied to a liquid crystal display; [0033] The second figure is a perspective view of a single-sided field emission planar light source device provided by the present invention, 3 is a cross-sectional view taken along the line mm in the second drawing; [0035] The fourth drawing is a cross-sectional view taken along line IV-IV in the second drawing; [0036] The fifth figure is a double-sided type provided by the present invention. Stereoscopic diagram of field emission planar light source device; 093122082 Form No. A0101 Page 9/Total 17 Page 0993230901-0 1330859 099 June 29 Press positive replacement page [0037] The sixth picture is along the VI-VI line in the fifth figure Cross-sectional view; [0038] The seventh drawing is a cross-sectional view along the WW line in the fifth drawing. [Main component symbol description] [0039] Single-sided field emission planar light source device: [0040] Double-sided field emission planar light source device: [0041] Base plate: 80 [0042] Cathode: 81, 91 [0043] Anode: 82 , 90, 92 [0044] Fluorescent layer: 83 [0045] Glass column: 84 [0046] Cathode lead: 85 [0047] Anode lead: 86 [0048] Exhaust pipe: 87 [0049] Getter: 88 [0050] Cathode fixing plate: 89 [0051] Spring: 94 [0052] Conductive bearing column: 812, 912 093122082 Form No. A0101 Page 10 of 17 0993230901-0