-1312219 九、發明說明： 【發明所屬之技術領域】 本案係關於—種電源供應器，特別是關於一種應 用於％發射顯示器之電源供應器。 【先前技術】 所明的％ 射顯示器（Fieid Emission Display, FED)，其原理與陰極射線管（Cathode Ray Tube, CRT) 非常類似，是利用陰極板電子源在高電場的吸引下， 轟擊陽極板螢光粉而發光的一種顯示技術。陰極射線 管是利用單一熱電子搶或三束熱電子搶發射電子，再 透過電磁場來曲折電子，使之撞擊在所需對應之螢光 粉位置；因此當陰極射線管顯示器的尺寸增大時，電 子束欲發生偏折所需之路徑亦須增大，此舉將使其厚 度增加。而場發射顯示器則是在每個畫素點底下均有 其獨自的電子發射源，如此電子將不需再偏折而能夠 直接撞擊螢光粉發光，實現了將陰極射線管顯示器薄 型化的理念。 °° Λ 場發射顯示器所需之電源供應器的輸出涵蓋了從 高壓(〜3KV)到低壓、以及正負電源等多組電源型式， 其電源供應器之模組不但有體積上的限制，再加上 高、低壓電源係混雜在同一個電路版上，若其配置方 式未經仔細考慮，很容易產生絕緣性不足、具有電磁 干擾(Electromagnetic Interference, ΕΜΙ)、以及電磁耐 受性（Electromagnetic Susceptibility, EMS)不佳等門 5 -1312219-1312219 IX. Description of the invention: [Technical field to which the invention pertains] This case relates to a power supply, and more particularly to a power supply for a % emission display. [Prior Art] The Fieid Emission Display (FED) has a principle similar to that of a cathode ray tube (CRT), which utilizes a cathode plate electron source to attract an anode plate under the attraction of a high electric field. A display technology that glows with phosphor powder. The cathode ray tube uses a single hot electron robbing or three beams of hot electrons to emit electrons, and then the electromagnetic field is used to bend the electrons to collide with the desired phosphor powder position; therefore, when the size of the cathode ray tube display is increased, The path required for the electron beam to be deflected must also be increased, which will increase its thickness. The field emission display has its own independent electron emission source under each pixel point, so that the electrons can directly hit the fluorescent powder without any deflection, and realize the concept of thinning the cathode ray tube display. . ° ° Λ The output of the power supply required for the field emission display covers multiple types of power supply from high voltage (~3KV) to low voltage, and positive and negative power supply. The power supply module not only has the size limit, but also The upper and lower voltage power supplies are mixed on the same circuit board. If the configuration is not carefully considered, it is easy to produce insufficient insulation, electromagnetic interference (Electromagnetic Interference, ΕΜΙ), and electromagnetic tolerance (Electromagnetic Susceptibility, EMS). ) poorly waiting for the door 5 - 1312219
-般來說，應用於場發射顯示器的電源供應 產生四組電源輸出:⑴高壓輸出、⑺中高壓輸 低塾輸出以及(4)負壓輸出；並提供給四組電源的 凋路。第一圖及第一圖沙)分別為習用的場發射 不為之回壓輸出電路、以及中高壓/低壓/負壓輸出電 路。 如第一圖（a)所示，高壓輪出電路丨〗係由第一脈寬 凋後：电路ill、第二脈寬調變電路112、第一電晶體開 關Ml、第二電晶體開關M2、變壓器τ、由二極體與 電容所構成的整流電路113、低電壓源Π4以及電阻電 路Rset所構成，整個高壓輸出電路u屬於一推挽式 (Push-Pull)電路。其中，兩組反相的脈寬調變電路 及112與兩顆電晶體開關Ml及M2負責穩壓與驅動作 業，低電壓源114經由變壓器τ的升壓與整流電路U3 的整流，最後輸出一高電壓。 如第一圖（b)所示’中高壓/低壓/負塵輸出電路I) 係由低電壓源121以及三組轉換電路所構成。第一電 感L· 1、第三電晶體開關M3以及第一二極體d 1構成 了第一升壓（Boost)轉換電路，第二電感L2、第四電晶 體開關M4以及第二二極體D2構成了第二升壓轉換電 路，兩個升塵轉換電路分別輸出一中高電壓以及一低 電壓。第三電感L3、第五電晶體開關M5以及第三二 極體D3構成了降-升麼（Buck-Boost)轉換電路，降_升 壓轉換電路輸出一負電壓。其中，三個電感L1、L2 6 •1312219 及L3用以儲存與釋放能量，而三顆電晶體開關M3、 M4及M5則分別需要各別的脈寬調變電路以進行控制 與穩壓，如第一圖（c)之脈寬調變電路的信號示意圖所 示0 由第一圖（a)、第一圖（b)及第一圖（c)來看，習用之 應用於場發射顯示器的電源供應器總共需要五顆電晶 體開關（Ml〜M5)、五組脈寬調變電路、以及五個電感 (T、L1〜L3)所構成的四組轉換電路以完成整個模組。In general, the power supply applied to the field emission display produces four sets of power outputs: (1) high voltage output, (7) medium and high voltage input low voltage output, and (4) negative voltage output; and is provided to the four groups of power supplies. The first picture and the first figure are respectively used for the field emission, the back pressure output circuit, and the medium high voltage/low voltage/negative voltage output circuit. As shown in the first figure (a), the high voltage wheel circuit is terminated by the first pulse width: the circuit ill, the second pulse width modulation circuit 112, the first transistor switch M1, and the second transistor switch. M2, a transformer τ, a rectifier circuit 113 composed of a diode and a capacitor, a low voltage source Π4, and a resistor circuit Rset. The entire high voltage output circuit u belongs to a push-pull circuit. Wherein, two sets of inverted pulse width modulation circuits and 112 and two transistor switches M1 and M2 are responsible for voltage regulation and driving operation, and the low voltage source 114 is rectified by the voltage of the transformer τ and rectified by the rectifier circuit U3, and finally output. A high voltage. As shown in the first figure (b), the 'medium high voltage/low voltage/negative dust output circuit I) is composed of a low voltage source 121 and three sets of conversion circuits. The first inductor L·1, the third transistor switch M3, and the first diode d1 constitute a first boost converter circuit, a second inductor L2, a fourth transistor switch M4, and a second diode D2 constitutes a second boost converter circuit, and two fly-up converter circuits respectively output a medium high voltage and a low voltage. The third inductor L3, the fifth transistor switch M5, and the third diode D3 constitute a Buck-Boost conversion circuit, and the down-up voltage conversion circuit outputs a negative voltage. Among them, three inductors L1, L2 6 • 1312219 and L3 are used to store and release energy, and three transistor switches M3, M4 and M5 respectively require separate pulse width modulation circuits for control and voltage regulation. As shown in the signal diagram of the pulse width modulation circuit of the first figure (c), as shown in the first figure (a), the first figure (b) and the first figure (c), the conventional application is applied to the field emission. The power supply of the display requires a total of five transistor switches (M1 to M5), five sets of pulse width modulation circuits, and four sets of conversion circuits (T, L1 to L3) to complete the entire module. .
然而，這四組轉換電路除了會佔用極大空間而不利電 源供應器的小型化之外，三個電感L1〜L3與變壓器τ ^磁性元件的存在更會產生較大的電磁干擾。是故°， 習用之應詩場發射顯示器、的電源供應器的電路架構 不但會，高成本’亦不利⑽之抗電磁干擾的表現。 職疋之故，申請人鑑於習知技術中所產生之缺 失，經過悉心試驗盘研穿 、 終構思出太宏「痛，、研九亚一本鍥而不捨之精神， ^ ^…用於場發射顯示器之電源供應器」， 乂下為本案之簡要說明。 7 1312219 【發明内容】 、、本案之構想為提出-種應用於場發射 源供應器，相較;^習用# 。之％ 仰权X白用技術’其係使 換電路即可構成四組電源輸 ^ 、轉 制為减減少電源供應器中對於電感 亦即減少了電源供應器中的電磁 = ， 電磁干擾效瘅，、#处隊#十 干擾源；不但能降低 利源供應器的製造成本，有 利於電源供應器的小型化。 旁However, in addition to minimizing the power supply of the four sets of conversion circuits, the three inductors L1 to L3 and the presence of the transformer τ ^ magnetic elements generate greater electromagnetic interference. Therefore, the circuit structure of the power supply of the oscillating field display display is not only high cost but also unfavorable (10) anti-electromagnetic interference performance. In the light of the occupation, the applicant, in view of the lack of knowledge in the prior art, has carefully studied and put on the experience, and finally conceived Taihong’s "pain, and researched the spirit of Jiuya." ^... for field emission display The power supply," is a brief description of the case. 7 1312219 [Summary of the Invention], the concept of the case is proposed - applied to the field emission source supplier, compared to; ^ used #. % 仰 权 X white technology "The system can make four sets of power supply to change the circuit, and reduce it to reduce the power supply in the power supply, that is, reduce the electromagnetic voltage in the power supply, electromagnetic interference effect, #处队# Ten interference sources; not only can reduce the manufacturing cost of the source supply, but also contribute to the miniaturization of the power supply. Next to
之電案之構想，提出—種應用於場發射顯示器 電祕應H，包括-電源控制器、—高I輸出 及—中局壓/低壓/負壓輸出電路。 ％ 盪源控制器包括脈衝頻率調變器、振 2比h及數位邏輯電路，用以驅動外部系統電 -件該高㈣出電路包括—返跳式轉換器及 乜壓整流電路，用以輸出一高電壓。 較佳者’該中高壓/低壓/負壓輸出電路包括一升壓 電路，用以輪出一低電壓。 土 『較佳者，該中高壓/低壓/負壓輸出電路包括一三 壓電荷幫浦電路及一線性穩壓電路，用以輸出一 電髮。 问 y \較佳者，該中高壓/低壓/負壓輸出電路包括一二俨 =電荷幫浦電路及-負壓穩壓電路，㈣輸 本案得藉由下.列圖式及詳細說明，俾得深入了解· 8 1312219 【實施方式】 請參閱第二圖，其為本案所提出應用於場發射顯 示器之電源供應器的電路方塊圖，其中電源供應器20 係由高壓輸出電路30以及中高壓/低壓/負壓輸出電路 40所構成。 高壓輸出電路30係由返驰式轉換器（Flyback Converter)301及倍壓整流電路302所構成，用以輸出 一高電壓。 中高壓/低壓/負壓輸出電路40係由升壓電路 401、第一電荷幫浦電路404、線性穩壓電路405、第 二電荷幫浦電路406、以及負壓穩壓電路407所構成， 用以輸出一中高電壓、一負電壓、以及一低電壓。其 中，升壓電路401之運作可輸出該低電壓，升壓電路 401、第一電荷幫浦電路404及線性穩壓電路405共同 運作可輸出該中高電壓，升壓電路401、第二電荷幫 浦電路406及負壓穩壓電路407共同運作可輸出該負 電壓。 以下，根據第二圖中關於高壓輸出電路30與中高 壓/低壓/負壓輸出電路40的電路拓樸，分別提出相應 之電路實施例，要注意的是，以下所述之各種電路配 置方式並非用以限制本案，熟習第二圖之電路拓樸以 及電源供應器之製作技術者得以在滿足相同功能的前 提之下輕易構思出其他型態的電路結構。 請參閱第三圖，其為第二圖之高壓輸出電路一較 佳實施例的電路圖，其中高壓輸出電路30主要係由返 9 1312219 馳式轉換器301及倍壓整流電路302所構成，除此之 外，作為一較佳實施例，高壓輸出電路3 0還包括了第 三脈寬調變電路303、低電壓源304、以及電阻電路 Rset。 作為一較佳實施例，返馳式轉換器301係由電晶 體開關（此處為電晶體開關）M6及變壓器T所構成，而 倍壓整流電路302則係由互相耦接的二個二極體D4、 D5以及二個電容Cl、C2所構成。 在第三圖的高壓輸出電路30之中，由於係使用馳 返式轉換器301，因此只需要一顆電晶體開關（M6)即 可完成接收來自於第三脈寬調變電路303之第一脈寬 調變信號以產生一次升壓的工作。此外，使用倍壓整 流電路302將該一次升壓調整為規格的高壓輸出，則 可以讓變壓器T的線圈圈數減少，不但使得變壓器T 的寄生電容與漏感降低，更可使得二次侧反射至一次 側的脈衝電壓減低，因此高壓輸出電路30所輸出的高 電壓便能夠更加穩定。再者，與習用技術相比較，本 案之高壓輸出電路30的配置方式還能夠省略一顆電 晶體開關與一組脈寬調變電路，有利於電源供應器的 小型化。 請參閱第四圖，其為第二圖之中高壓/低壓/負壓輸 出電路一較佳實施例的電路圖，其中中高壓/低壓/負壓 輸出電路40主要係由升壓電路401、三倍壓電荷幫浦 電路404、線性穩壓電路405、二倍壓電荷幫浦電路 406、以及負壓穩壓電路407所構成，除此之外，作為 10 1312219 一較佳實施例，中高壓/低壓/負壓輸出電路40還包括 了第四脈寬調變電路402、低電壓源403、電感L4、 電容C3以及電阻電路Rset。 作為一較佳實施例，升壓電路401係由電晶體開 關（此處為電晶體開關）M7及飛輪二極體D6所構成， 藉由升壓電路401考將低電壓源403提升，並根據來 自於第四脈寬調變電路402的一第二脈寬調變信號而 輸出一低電壓。 此外，升壓電路401、三倍壓電荷幫浦電路404、 以及線性穩壓電路405係共同運作而輸出一中高電 壓。作為一較佳實施例，三倍壓電荷幫浦電路404係 由二極體D7〜D10以及電容C4〜C6所構成，而線性穩 壓電路405則係由雙載子接面電晶體B1〜B2、電阻 R1〜R4、以及比較器X戶斤構成。其中，三倍壓電荷幫 浦電路404係將來自於升壓電路401的該低電壓提升 成原來的三倍，接著此一三倍的該低電壓再經由線性 穩壓電路405的穩壓作用，最後以一中高電壓的型態 被輸出；需要注意的是，此一中高電壓係小於三倍的 該低電壓。 另一方面，升壓電路401、二倍壓電荷幫浦電路 406、以及負壓穩壓電路407係共同運作而輸出一負電 壓。作為一較佳實施例，二倍壓電荷幫浦電路406係 由二極體D11〜D12與電容C7〜C8所構成，而負壓穩 壓電路407則係使用一反向的齊納二極體Z來製作。 其中，二倍壓電荷幫浦電路406係將來自於升壓電路 .1312219 仞！的该低電壓提升成原來的二倍，接著此一二倍的 該低電壓再經由齊納二極體z的穩壓作用，最後以一 ^電壓的型態被輸出；需要注意的是，此一負電壓係 等於齊納二極體z的穩壓電源。 一 5青參閱第五圖，其為本案所提出應用於場發射顯 不器之電源控制器的電路圖，其中電源控制器5〇係由 脈波頻率調變器5(Π、振盪器5〇2、高低壓端脈波比較 器503、以及參考電壓產生器5〇4所構成。此外，電 源控制器50還包括了偵測高壓端電流放大器5〇5、中 高壓控制放大器506、過電壓比較器5〇7、以及數位控 制電路508。 其中，電源控制器50接收高壓電路與低壓電路的 迴授電壓，搭配參考電壓產生器5〇4產生的兩組穩定 電壓源與高低壓端脈波比較器5〇3,以偵測兩組脈波 訊號並提供給脈波頻率調變器5〇1 ;脈波頻率調變器 501為一種固定導通時間脈波但頻率可變的調變器， 利用接收脈波比較器503的訊號進行頻率的調變，最 後當做高壓與低端電晶體驅動訊號；振盪器5〇2由環 式振盪電路所構成，主要偵測高低壓脈波比較器5的 的輸出訊號，當該輸出訊號為低準位時，即能啟動振 盈器502 ’後續能啟動脈波頻率調變器501，當該輪出1 訊號為高準位時，即關閉振盪器5〇2與脈波 = 器501。 周受 由第五圖的電源控制器50與高壓電路3〇以 高壓/低壓/負壓輸出電路4〇來看，本案所提 中 ^ ^應用 12 1312219 於場發射顯示器的電源供應器僅須使用二 關（M6、M7)、二組脈寬調變電路(3〇3、4〇2)、 ^ 個電感（T、L4)所構成的二组轉換電路即可完成整個模 組。於習用技術相比，這二組轉換電路省去了三顆命 晶體開關與二個電感的使用；不但在體積上有利於； 源供應器的小型化，亦減少了電感等等磁性元件的存 在更可減少電磁干擾，而若是需要變動電源規格 僅須微調該等脈寬調變電路即可滿足。是故，」 應用於場發射顯示器的電源供應器低 本，更可以提升其抗電磁干擾的表現。 幸低成 本案得由熟悉本技蔽之人^ _ ^ 文π之人士任施匠思而為諸般修 飾，然皆不脫如附申請專利範圍所欲保護者。 / 【圖式簡單說明】 電路^圖⑷··習用場發射顯示器之高_出電路的 J 一圖(b):習用場發射顯示器之中高壓/低壓/負 壓輸出電路的電路圖； 貝 第一圖（c):習用場發射顯示器之脈寬調變電 信號示意圖； ▽ 第提出應用於場發射顯示器之 供應器的電路方塊圖； 電/原 電路: 三圖:第二圖之高壓輸出電路-較佳實施例的 第四圖：第二圖之中高壓/低壓/負壓輸出電路— 1312219 較佳實施例的電路圖；及 第五圖：本案所提出應用於場發射顯示器之電源 控制器較佳實施例的電路圖。 【主要元件符號說明】 11高壓輸出電路 111第一脈寬調變電路 112第二脈寬調變電路 | 113整流電路 114低電壓源 12中高壓/低壓/負壓輸出電路 121低電壓源 20電源供應器 30高壓輸出電路 301返馳式轉換器 | 302倍壓整流電路 303第三脈寬調變電路 304低電壓源 40中高壓/低壓/負壓輸出電路 401升壓電路 402第四脈寬調變電路 403低電壓源 404第一電荷幫浦電路（三倍壓電荷幫浦電路） 14 •1312219 405線性穩壓電路 406第二電荷幫浦電路（二倍壓電荷幫浦電路) 407負壓穩壓電路 50電源控制器 501脈波頻率調變器 502振盪器 503高低壓端脈波比較器 504參考電壓產生器 505高壓端流放大器 506中高壓控制放大器 507過電壓比較器 508數位控制電路The concept of the electric case, proposed to be applied to the field emission display, should be H, including - power controller, - high I output and - medium voltage / low voltage / negative voltage output circuit. The sway source controller includes a pulse frequency modulator, a oscillating frequency ratio h, and a digital logic circuit for driving an external system. The high (four) output circuit includes a flyback converter and a squeezing rectifier circuit for output. A high voltage. Preferably, the medium high voltage/low voltage/negative voltage output circuit includes a boost circuit for rotating a low voltage. Soil 『Preferred, the medium high voltage/low voltage/negative voltage output circuit includes a three-voltage charge pump circuit and a linear voltage regulator circuit for outputting an electric wave. Ask y \ preferred, the medium high voltage / low voltage / negative voltage output circuit includes a two 俨 = charge pump circuit and - negative voltage regulator circuit, (four) the input case can be by the following. Column diagram and detailed description, 俾For a better understanding · 8 1312219 [Embodiment] Please refer to the second figure, which is a circuit block diagram of the power supply device applied to the field emission display, wherein the power supply 20 is connected by the high voltage output circuit 30 and the medium high voltage / The low voltage/negative voltage output circuit 40 is constructed. The high voltage output circuit 30 is composed of a flyback converter 301 and a voltage doubler rectifier circuit 302 for outputting a high voltage. The medium high voltage/low voltage/negative voltage output circuit 40 is composed of a boosting circuit 401, a first charge pump circuit 404, a linear voltage stabilizing circuit 405, a second charge pump circuit 406, and a negative voltage regulator circuit 407. To output a medium high voltage, a negative voltage, and a low voltage. The operation of the boosting circuit 401 can output the low voltage, and the boosting circuit 401, the first charge pumping circuit 404 and the linear voltage stabilizing circuit 405 operate together to output the medium and high voltage, and the boosting circuit 401 and the second charge pump The circuit 406 and the negative voltage regulator circuit 407 operate together to output the negative voltage. Hereinafter, according to the circuit topology of the high voltage output circuit 30 and the medium high voltage/low voltage/negative voltage output circuit 40 in the second figure, corresponding circuit embodiments are respectively proposed. It should be noted that the various circuit configurations described below are not To limit the case, the circuit topology familiar with the second figure and the power supply manufacturer can easily conceive other types of circuit structures while satisfying the same function. Please refer to the third figure, which is a circuit diagram of a high-voltage output circuit of the second figure. The high-voltage output circuit 30 is mainly composed of a 9 1312219 chirp converter 301 and a voltage doubler rectifier circuit 302. In addition, as a preferred embodiment, the high voltage output circuit 30 further includes a third pulse width modulation circuit 303, a low voltage source 304, and a resistance circuit Rset. As a preferred embodiment, the flyback converter 301 is composed of a transistor switch (here, a transistor switch) M6 and a transformer T, and the voltage doubler rectifier circuit 302 is connected by two poles coupled to each other. The bodies D4 and D5 and the two capacitors C1 and C2 are formed. In the high-voltage output circuit 30 of the third figure, since the flyback converter 301 is used, only one transistor switch (M6) is required to complete the reception from the third pulse width modulation circuit 303. A pulse width modulation signal to produce a boost operation. In addition, by using the voltage doubler rectifier circuit 302 to adjust the primary boost to a high voltage output of the specification, the number of coil turns of the transformer T can be reduced, which not only reduces the parasitic capacitance and leakage inductance of the transformer T, but also causes secondary side reflection. Since the pulse voltage to the primary side is reduced, the high voltage output from the high voltage output circuit 30 can be more stable. Furthermore, compared with the conventional technology, the high voltage output circuit 30 of the present invention can also omit a transistor switch and a set of pulse width modulation circuits, which is advantageous for miniaturization of the power supply. Please refer to the fourth figure, which is a circuit diagram of a high voltage/low voltage/negative voltage output circuit in a second embodiment, wherein the medium high voltage/low voltage/negative voltage output circuit 40 is mainly composed of a boost circuit 401, three times. The piezoelectric charge pump circuit 404, the linear voltage stabilizing circuit 405, the double voltage charge pump circuit 406, and the negative voltage voltage stabilizing circuit 407 are formed. In addition, as a preferred embodiment, 10 1312219, medium high voltage/low voltage The /negative voltage output circuit 40 further includes a fourth pulse width modulation circuit 402, a low voltage source 403, an inductor L4, a capacitor C3, and a resistor circuit Rset. As a preferred embodiment, the boosting circuit 401 is composed of a transistor switch (here, a transistor switch) M7 and a flywheel diode D6. The boosting circuit 401 tests the low voltage source 403 and according to A second pulse width modulation signal from the fourth pulse width modulation circuit 402 outputs a low voltage. Further, the boosting circuit 401, the triple voltage charge pump circuit 404, and the linear voltage regulator circuit 405 operate in cooperation to output a medium-high voltage. As a preferred embodiment, the triple voltage charge pump circuit 404 is composed of diodes D7 to D10 and capacitors C4 to C6, and the linear regulator circuit 405 is composed of bipolar junction transistors B1 to B2. The resistors R1 R R4 and the comparator X are formed. The triple voltage charge pump circuit 404 boosts the low voltage from the boost circuit 401 by a factor of three, and then the three times the low voltage is further regulated by the linear regulator circuit 405. Finally, it is outputted in a medium-high voltage type; it should be noted that the medium-high voltage is less than three times the low voltage. On the other hand, the boosting circuit 401, the double voltage charge pump circuit 406, and the negative voltage regulator circuit 407 operate in cooperation to output a negative voltage. As a preferred embodiment, the double voltage charge pump circuit 406 is composed of diodes D11 to D12 and capacitors C7 to C8, and the negative voltage regulator circuit 407 uses a reverse Zener diode. Z to make. Among them, the double voltage charge pump circuit 406 will come from the boost circuit .1312219 仞! The low voltage is doubled to the original, and then the low voltage is again regulated by the Zener diode z, and finally outputted as a voltage type; it should be noted that this A negative voltage is equal to the regulated power supply of Zener diode z. A fifth diagram refers to the fifth diagram, which is a circuit diagram of the power controller applied to the field emission display device, wherein the power controller 5 is connected to the pulse frequency modulator 5 (Π, oscillator 5〇2) The high and low voltage end pulse comparator 503 and the reference voltage generator 5〇4. In addition, the power controller 50 further includes a detection high voltage terminal current amplifier 5〇5, a medium voltage control amplifier 506, and an overvoltage comparator. 5〇7, and digital control circuit 508. The power controller 50 receives the feedback voltage of the high voltage circuit and the low voltage circuit, and is matched with the two sets of stable voltage source and high and low voltage pulse wave comparator generated by the reference voltage generator 5〇4. 5〇3, to detect two sets of pulse wave signals and provide them to the pulse wave frequency modulator 5〇1; the pulse wave frequency modulator 501 is a fixed on-time pulse wave but variable frequency modulator, using receiving The signal of the pulse wave comparator 503 is frequency-modulated, and finally, the high-voltage and low-end transistor driving signals are used; the oscillator 5〇2 is composed of a ring-shaped oscillation circuit, and mainly detects the output of the high-low voltage pulse wave comparator 5. Signal, when the output When the number is low, the oscillator 502' can be activated to activate the pulse frequency modulator 501. When the wheel 1 signal is high, the oscillator 5〇2 and the pulse wave converter are turned off. 501. According to the power supply controller 50 and the high voltage circuit 3 of the fifth figure, the high voltage/low voltage/negative voltage output circuit 4〇, the application of the present invention is 12 1312219. The whole module can be completed by using two sets of conversion circuits consisting of two levels (M6, M7), two sets of pulse width modulation circuits (3〇3, 4〇2), and ^ inductors (T, L4). Compared with the conventional technology, the two sets of conversion circuits eliminate the use of three crystal switches and two inductors; not only in volume; but also in miniaturization of the source supply, and also reduce the presence of magnetic components such as inductors. It can reduce electromagnetic interference, and if it is necessary to change the power supply specifications, it is only necessary to fine-tune the pulse width modulation circuits. Therefore, the power supply used in the field emission display has a low cost and can improve its electromagnetic interference resistance. Performance. Fortunately, the low-cost case is made by people who are familiar with this technique ^ _ ^ The person who has been arbitrarily modified and modified for all, is not subject to the scope of the patent application. / [Simple diagram] Circuit ^ Figure (4) · The high field of the field emission display _ out of the circuit J Figure (b): Circuit diagram of the high voltage/low voltage/negative voltage output circuit in the field emission display; Figure 1 (c): Schematic diagram of the pulse width modulation electrical signal of the field emission display; ▽ Circuit block diagram of the supply of the display; electric / original circuit: three figures: high voltage output circuit of the second figure - fourth picture of the preferred embodiment: high voltage / low voltage / negative voltage output circuit in the second picture - 1312219 A circuit diagram of a preferred embodiment; and a fifth diagram: a circuit diagram of a preferred embodiment of a power supply controller for use in a field emission display as proposed in the present application. [Main component symbol description] 11 high voltage output circuit 111 first pulse width modulation circuit 112 second pulse width modulation circuit | 113 rectifier circuit 114 low voltage source 12 high voltage / low voltage / negative voltage output circuit 121 low voltage source 20 power supply 30 high voltage output circuit 301 flyback converter | 302 voltage rectification circuit 303 third pulse width modulation circuit 304 low voltage source 40 high voltage / low voltage / negative voltage output circuit 401 boost circuit 402 fourth Pulse width modulation circuit 403 low voltage source 404 first charge pump circuit (triple voltage charge pump circuit) 14 • 1312219 405 linear voltage regulator circuit 406 second charge pump circuit (double voltage charge pump circuit) 407 Negative Voltage Stabilization Circuit 50 Power Supply Controller 501 Pulse Frequency Modulator 502 Oscillator 503 High and Low Voltage End Pulse Comparator 504 Reference Voltage Generator 505 High Voltage Terminal Current 506 Medium High Voltage Control Amplifier 507 Over Voltage Comparator 508 Digital Control circuit
Bl、B2雙載子接面電晶體 C1〜C8電容 D1〜D12二極體 L1〜L4電感Bl, B2 double carrier junction transistor C1~C8 capacitor D1~D12 diode L1~L4 inductor
Ml〜M7電晶體開關 R1〜R4電阻Ml~M7 transistor switch R1~R4 resistor
Rset電阻電路 T變壓器 X比較器 Z齊納二極體 15Rset resistor circuit T transformer X comparator Z Zener diode 15