201011722 v, W26407twf.doc/n 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種平面顯示器，且特別是有關於— 種液晶顯示器。 【先前技術】 現今社會多媒體技術相當發達，多半受惠於半導體元 件與顯示裝置的進步。就顯示器而言，具有高畫質、空間 利用效率佳、低消耗功率、無輻射等優越特性的液晶顯 β ll(LCD)已逐漸成為市場之主流。 ~ 圖1為習知液晶顯示器的系統架構圖。請參照圖1， 習知液晶顯示器1〇〇包括顯示面板110、閘極驅動器12〇、 源極驅動器130、時序控制器14〇、升壓電路151與152、 電源模組160以及背光單元17〇。此外，背光單元包 括夕數個發光二極體(Light Emitting Diode，LED)串列 171〜173以及電流驅動器174。 在整體作動上’升壓電路151會提升輸入電壓ViN1 © 的準位’而據以產生一電源電壓ν〇〇ι。電源模組16〇則會 依據電源電壓VDDi來產生閘極驅動器12〇的工作電壓 Vopii、源極驅動器130的工作電壓v〇pl2以及顯示面板 的共同電壓Vc〇mi。藉此，閘極驅動器120與源極驅動器 130會在時序控制器14〇的控制下，進而致使顯示面板u〇 產生影像。 另一方面’電流驅動器174用以提供LED串列 171〜173所需的電流’以致使背光單元ι7〇產生顯示面板 201011722 υ / iui οοι 1W 264Q7twf.doc/n 110在顯示影像過程中所需的光源。然而，由一 170必需採用-高電壓Vledi才能驅動LED 因此習知液晶顯示n 1GG必需湘另—升 生led串列m〜173所需的高電壓壓電路152來產 換而言之，習知液晶顯示器刚必需 才能/生間極驅動器120與源極驅動器二 的工作電壓ν0Ραν0Ρ12、顯示面板11〇的共201011722 v, W26407twf.doc/n IX. Description of the Invention: [Technical Field] The present invention relates to a flat panel display, and more particularly to a liquid crystal display. [Prior Art] Today's social multimedia technology is quite developed, and most of them benefit from the advancement of semiconductor components and display devices. In terms of displays, liquid crystal display (LCD) with superior image quality, good space utilization efficiency, low power consumption, and no radiation has gradually become the mainstream in the market. ~ Figure 1 is a system architecture diagram of a conventional liquid crystal display. Referring to FIG. 1 , the conventional liquid crystal display 1 includes a display panel 110 , a gate driver 12 , a source driver 130 , a timing controller 14 , a boosting circuit 151 and 152 , a power module 160 , and a backlight unit 17 . . Further, the backlight unit includes a plurality of Light Emitting Diode (LED) strings 171 to 173 and a current driver 174. In the overall operation, the booster circuit 151 raises the level of the input voltage ViN1 © and generates a power supply voltage ν〇〇ι. The power supply module 16 turns the operating voltage Vopii of the gate driver 12A, the operating voltage v〇pl2 of the source driver 130, and the common voltage Vc〇mi of the display panel in accordance with the power supply voltage VDDi. Thereby, the gate driver 120 and the source driver 130 are controlled by the timing controller 14A, thereby causing the display panel to generate an image. On the other hand, the 'current driver 174 is used to supply the current required for the LED strings 171 to 173' to cause the backlight unit to generate the display panel 201011722 υ / iui οοι 1W 264Q7twf.doc/n 110 required for displaying images. light source. However, it is necessary to use a high voltage Vledi to drive the LED from a 170. Therefore, it is known that the liquid crystal display n 1GG must be replaced by the high voltage voltage circuit 152 required for the LED series m to 173. It is known that the liquid crystal display is only required to have the working voltage ν0Ραν0Ρ12 of the inter-pole driver 120 and the source driver 2, and the display panel 11〇
以及驅動LED串列171〜173所需的高電壓v_。此ϋ 況不僅限制了習知液晶顯示器的微型化，更货加 知液晶顯示器100的製作成本。 曰 【發明内容】 本發明是提供-種液晶顯示器，其只需利用一組升壓 電路就可產生液晶顯示器之内部電路所需的電塵。 本發明是提供-種液晶顯示器，其具有較小電路佈局 面積以及較低製作成本的優勢。 本發明提出-種液晶顯示器，包括一顯示面板、一升 壓電路貪光單兀、-電壓供應單元、一閘極驅動器以 及-源極驅動器。其中，升壓電路用以接收一輸入電壓， 並產生-輸出電壓。背光單元用以依據輸出電壓產生顯示 面板所需的光源。 再者，電壓供應單元會依據輪出電壓而產生一第一工 作电壓、一第一工作電壓以及一共同電壓。藉此，閘極驅 動器將接收第-卫作電壓，以產生多數個閘極脈衝。此外， 源極驅動ϋ會減第二工作電壓下，想合所述閘極脈衝 201011722 v /1 υ i οοι i W 26407twf.doc/n 來驅動顯示面板内的該些晝素。 在本發明之一實施例中，上述之電壓供應單元包括一 第一電壓產生器、一第二電壓產生器以及一電壓控制電 路。其中，第一電麼產生器用以依據輸出電虔而產生第一 工作電壓。第二電壓產生器用以依據輸出電壓而產生顯示 面板的共同電壓。此外，電壓控制電路會透過調整輸出電 壓而產生第二工作電壓。 本發明更提出一種液晶顯示器，包括一顯示面板、一 升壓電路、一電壓供應單元、一閘極驅動器、一源極驅動 器、一第一電壓控制電路以及一背光單元。其中，升壓電 路用以接收一輸入電壓，並產生一輸出電壓。電壓供應單 元用以依據輸出電壓而產生一第一工作電壓、一第二工作 電壓以及一共同電壓。 藉此’閘極驅動器會接收第一工作電壓，以產生多數 個閘極脈衝。源極驅動器會接收第二工作電壓，以配合所 述閘極脈衝來驅動顯示面板内的該些晝素。此外，第一電 壓控制電路會透過調整輸出電壓而產生一光源驅動電壓。 而背光單元則會產生顯示面板所需的光源。 在本發明之一實施例中，上述之電壓供應單元包括一 第一電壓產生器、一第二電壓產生器以及一第二電壓控制 電路。其中，第一電壓產生器用以依據輸出電壓而產生第 —工作電壓。第二電壓產生器用以依據輸出電壓而產生顯 示面板的共同電壓。再者，第二電壓控制電路會透過調整 輸出電壓而產生第二工作電壓。 201011722 u/ luieen'W 26407twf.doc/n 本發明之-實施例中，上述之第二電壓控制電路與 it哭：2控制電路的内部架構相同。此外，所述液晶 紅7Τι+匕一時序控制器。其中，閘極驅動器與源極驅 ⑽曰時序控制器的控制下而致使顯示面板產生影像。 本發明因採用—組升壓電路就可產生液晶顯示器之 内部電路所㈣，例如：_驅動ϋ與雜鶴器的工 $電壓、顯不面板的共同電壓以及驅動發光二極體串列所 $的fμ卩此’與習知技術相較之下，本發明所述之液 TFli具有微型化以及降低製作成本的優勢。 為讓本發明之上述和其他目的、特徵和優點能更明顯 易1’下文特舉較佳實施例，並配合所附圖# 明如下。 【實施方式】 在以下說明中，為呈現對本發明之說明的一貫性，故 在不同的實施例中，若有功能與結構相同或相似的元件會 用相同的元件符號與名稱。 ❺ [第一實施例] 圖2繪不為依據本發明第一實施例之液晶顯示器的系 統架構圖。請參照圖2，液晶顯示器2〇〇包括一顯示面板 =10、一閘極驅動器220、一源極驅動器23〇、一時序控制 器240、一升壓電路25〇、一電壓供應單元26〇以及一背光 單元270。 请繼續參照圖2，電壓供應單元260與背光單元270 電性連接至升壓電路250。閘極驅動器220電性連接至顯 8 201011722 υ/iuidoii W26407twf.doc/n 示面板210與電壓供應單元260。源極驅動器230電性連 接至顯示面板210與電壓供應單元260。此外，時序控制 器240電性連接至閘極驅動器220與源極驅動器230。 更進一步來看’顯示面板210包括多數個晝素(未緣示 出）。電壓供應早元260包括電壓產生器261與262以及一 電壓控制電路263。其中’電壓產生器261電性連接至升 壓電路250與閘極驅動器220。電壓產生器262電性連接 至升壓電路250。電壓控制電路263則電性連接至升壓電 ® 路250與源極驅動器230。 另一方面，背光單元270包括多數個發光二極體串列 271〜273以及一電流驅動器274。其中，發光二極體串列 271〜273的第一端電性連接至升壓電路25〇，且發光二極 體串列271〜273的第二端電性連接至電流驅動器274。此 外，如圖2所示的，發光二極體串列271〜273分別由相互 串接的多數個發光二極體所構成。 在整體作動上，升壓電路250用以提高一輸入電壓 ❹ Vin2的準位’並據以產生一輸出電壓ν〇υτ2。之後，電壓 產生器261會依據輸出電壓ν〇υτ2而產生工作電壓。 另一電壓產生器262會依據輸出電壓ν〇υτ2而產生顯示面 板210的共同電壓vc〇M2。電壓控制電路263則會透過調 整輸出電壓VOUT2來據以產生工作電壓v〇p22。 值得注意的是，閘極驅動器22〇會操作在工作電壓 Vop^下，而源極驅動器23〇則會操作在工作電壓v〇p22下。 換而吕之，電壓供應單元260會依據輸出電壓ν〇υτ2來產 9 201011722 υ /1 υ i οοι ι W 26407twf.doc/n 生閘極驅動器220的工作電壓Vom、源極驅動器mo的工 作電壓 V〇p22以及顯不面板的共同電壓Vc〇M2。 如此一來，當閘極驅動器220與源極驅動器230在分 別被工作電壓Vopm與ν〇ι>22致能的情況下，閘極驅動器 220與源極驅動器230會依據時序控制器240所傳送的訊 號，來致使顯示面板210產生影像。其中，閘極驅動器22〇 會產生多數個閘極脈衝，且該些閘極脈衝會在一畫面週期 内依序開啟顯示面板210 .内的畫素。相對地，源極驅動号 © 230會配合閘極驅動器220所產生的該些閘極脈衝來驅^ 顯示面板210内的晝素，以致使顯示面板21〇產生影像。 另一方面，顯示面板210在顯像過程中所需的光源則 疋由月光早元270來產生。值得注意的是，背光單元270 是直接利用升壓電路250所產生的輸出電壓ν〇υτ2來驅動 發光二極體串列271〜273。此外，當背光單元27〇依據輸 出電壓VOUT2而處在啟動狀態時’電流驅動器274則用以 產生並控制流經發光二極體串列271〜273的電流。藉此， ® 背光單元270將可利用電流驅動器274來控制發光二極體 串列271〜273的光亮度以及光均勻度等特性。 此外’在具體實現上，設計者可將升壓電路250與電 流驅動器274整合在單一晶片上，以藉此縮減液晶顯示器 200的硬體空間。相對地，為了更進一步縮減液晶顯示器 200的硬體空間’設計者也可將升壓電路25〇、電流驅動器 274以及電壓供應單元26〇整合在單一晶片上。然而，上 述所列舉的整合型態並非用以限定本發明，熟悉此技術者 201011722 υ /1 υ 1881 i'W 26407twf.doc/n 也可依據本實施的精神來更動液晶顯示器200的整合型 態。 值得一提的是’液晶顯示器200只需利用一組升壓電 路250就可產生閘極驅動器220的工作電壓VOP21、源極驅 動器230的工作電壓VOP22、顯示面板的共同電壓vCC)M2 以及驅動發光二極體串列271〜273所需的輸出電塵 VOUT2。因此’與習知技術相較之下，液晶顯示器2〇〇具有 微型化以及降低製作成本的優勢。 ❹ 為了讓熟悉此技術者能更了解本實施例之精神，以下 將針對電壓控制電路263與升壓電路250的内部架構作更 進一步的說明。 圖3A緣示為依據本發明一實施例之電壓控制電路的 電路架構圖。參照圖3A，電壓控制電路263包括一放大器 310、電阻心〜尺4以及一電容q。其中，放大器31〇具有 一正輸入端、一負輸入端以及一輸出端。電阻&的第一端 電性連接至一地端，且其第二端電性連接至放大器31()的 ❹ 負輸入端。電阻R2的第一端電性連接至放大器310的負輸 入端，且其第二端電性連接至放大器31〇的輸出端。 再者’電阻R_3的第一端電性連接至升壓電路25〇，且 其第一鳊電性連接至放大器31〇的正輸入端。電阻r4的第 一端電性連接至放大器31〇的正輸入端，且其第二端電性 連接至地端。此外，電容Ci的第一端電性連接至放大器 310的輸出端，且其第二端電性連接至地端。 在整體作動上，電壓控制電路263會透過電阻R3來 11 201011722 V/ΐνίΟΟΛ 1 接收輸出電壓ν〇υτ2，並透過放大器31〇的輸出端來產生 工作電壓V〇P22/其中，電阻Ri〜R4與放大器31〇會構成一 負回授電路。藉此，電壓控制電路263將可藉由具有不同 電阻值的電阻RHl4 ’來調整工作電壓v_與輸出電壓 v0UT2的比值，_進而達到工作電壓v〇p22的穩定控制。 圖3B繪不為依據本發明另一實施例之電壓控制電路 的電路架構圖。參照圖3B，電壓控制電路263包括電阻 Rs與尺6、電容C2與C3、一 P型電晶體Th以及一齊納二 罾 極體(zenerdiode)DZi。其中，電阻R5的第一端電性連接至 升壓電路250。P型電晶體ΤΙ>ι的源極端電性連接至電阻 R5的第二端。 再者，電阻Rg的第一端電性連接至電阻的Rs第二 端，且其第二端電性連接至p型電晶體ΤΡι的閘極端。電 容C2與電阻R6相互並聯。齊納二極體DZi的陰極端電性 連接至P型電晶體TP〖的閘極端，且其陽極端電性連接至 一地端。電容C3的第一端電性連接至p’型電晶體ΤΡι的汲 ❹ 極端，且其第二端電性連接至地端。 在整體作動上，電壓控制電路263會透過電阻&來 接收輸出電壓V〇ut2，並透過p型電晶體ΤΡι的汲極端來 產生工作電壓V〇P22。其中，電容C2、電阻R6與齊納二極 體DZ!用以操控p型電晶體ΤΡι的操作偏壓，以致使電壓 控制電路263能透過p型電晶體ΤΡι來穩定地輸出工作電 壓 V〇p22。 圖4緣示為依據本發明一實施例之升壓電路的電路架 12 201011722 υ / ιυιοοιι W 26407twf.doc/n 構圖。請參照圖4’升壓電路250包括電容c；4與C5、一電 感、一開關SW\、一二極體Di、一回授電路41〇以及 一脈寬調變控制器420。其中，電感L〗的第一端用以接收 輸入電壓vINZ。電容a的第一端電性連接至電感Li的第 一端’且其第二端電性連接至一地端。 再者，開關sWi的第一端電性連接至電感Li的第二 端，且其第二端電性連接至地端。二極體Di的陽極端電性 連接至電感Li的第二端，且其陰極端用以產生輪出電壓 VOUT2。電容C5的第一端電性連接至二極體仏的陰極端， 且其第二端電性連接至地端。此外，回授電路41〇電性連 接至二極體〇1的陰極端。而脈寬調變控制器42〇則電性連 接至回授電路410。 在整體操作上，脈寬調變控制器42〇用以產生一脈波 寬度調變訊號SPWM4。開關sWi則會依據脈波寬度調變訊 號SPWM4來調整其第一端與第二端之間的導通狀態。藉 此，當開關SWi開啟(turn on)時，電感L!將透過開關sWi ® 所成的接地路徑两開始儲能。相對地，當開關SW!關閉 (turn off)時’儲存在電感Li内的能量將透過二極體仏傳 送至電容C5。 隨著開關SW!不斷的開啟與關閉，升壓電路25〇將致 使輸入電壓vIN2升壓至輸出電壓ν〇υτ2。此外，回授電路 )1〇會依據輸出電壓乂〇讲2的準位而產生相應的一控制訊 號SCT4。相對地’脈寬調變控制器42〇會依據此控制訊號 Sow，來調整其所產生之脈波寬度調變訊號SpwM4的工作 13 201011722 〇/iu186uW26407twf.doc/n 週期。藉此’升壓電路250將可利用回授電路410來達到 輸出電壓V〇UT2的穩定控制。 [第二實施例] 圖5纷示為依據本發明第二實施例之液晶顯示器的系 統架構圖。參照圖5，第二實施例與第一實施例的主要差 異在於，液晶顯示器500中的電壓控制電路510與背光單 元 520。 ❹ 具體言之，在第二實施例中，電壓控制電路510是電 性連接至升壓電路250。此外，電壓控制電路51〇會透過 調整輸出電壓v0UT2來據以產生一光源驅動電壓Vled5。另 一方面，背光單元520包括多數個發光二極體串列521〜523 以及一電流驅動器5.24。其中，發光二極體串列521〜523 的第一端電性連接至電壓控制電路510，且發光二極體串 列521〜523的第二端電性連接至電流驅動器524。 在本實施例中，背光單元520是利用電壓控制電路51〇 所產生的光源驅動電壓VLED5來驅動發光二極體串列 ❹ 521〜523。此外，電流驅動器524用以產生並控制流經發 光二極體串列521〜523的電流。藉此，背光單元52〇將可 利用電流驅動器524來控制發光二.極體串列521〜523的光 亮度以及光均勻度等特性。 值得一提的是，在具體實現上，本實施例所述之電壓 控制電路510的内部架構可以與電壓控制電路263的内部 架構相同。換而言之，熟悉此技術者可參照圖3A或圖3B 所述的電路架構’來實現本實施例之電壓控制電路51〇。 14 201011722 υ /1 υ i ooi 1W 26407twf.doc/n 此外’如圖5所示的’發光二極體串列521〜523可分別由 相互串接的多數個發光二極體所構成。 另一方面’與第一實施例相似的，第二實施例也只需 利用一組升壓電路250就可產生閘極驅動器220的工作電 壓Vopn、源極驅動器230的工作電壓vOP22、顯示面板的 共同電壓VCOM2以及驅動發光二極體串列521〜523所需的 光源驅動電壓VygD5。And the high voltage v_ required to drive the LED strings 171 to 173. This situation not only limits the miniaturization of the conventional liquid crystal display, but also increases the manufacturing cost of the liquid crystal display 100. SUMMARY OF THE INVENTION The present invention provides a liquid crystal display that can generate electric dust required for an internal circuit of a liquid crystal display by using only one set of boosting circuits. SUMMARY OF THE INVENTION The present invention is directed to a liquid crystal display which has the advantages of a small circuit layout area and a low manufacturing cost. The present invention provides a liquid crystal display comprising a display panel, a booster circuit, a voltage supply unit, a gate driver, and a source driver. The booster circuit is configured to receive an input voltage and generate an output voltage. The backlight unit is configured to generate a light source required for the display panel according to the output voltage. Furthermore, the voltage supply unit generates a first operating voltage, a first operating voltage, and a common voltage based on the wheel-out voltage. Thereby, the gate driver will receive the first-servo voltage to generate a plurality of gate pulses. In addition, the source driver ϋ is reduced by the second operating voltage, and the gate pulse 201011722 v /1 υ i οοι i W 26407twf.doc/n is intended to drive the pixels in the display panel. In an embodiment of the invention, the voltage supply unit includes a first voltage generator, a second voltage generator, and a voltage control circuit. The first power generator is configured to generate a first operating voltage according to the output power. The second voltage generator is operative to generate a common voltage of the display panel in accordance with the output voltage. In addition, the voltage control circuit generates a second operating voltage by adjusting the output voltage. The invention further provides a liquid crystal display comprising a display panel, a boosting circuit, a voltage supply unit, a gate driver, a source driver, a first voltage control circuit and a backlight unit. The boost circuit is configured to receive an input voltage and generate an output voltage. The voltage supply unit is configured to generate a first operating voltage, a second operating voltage, and a common voltage according to the output voltage. Thereby the gate driver receives the first operating voltage to generate a plurality of gate pulses. The source driver receives a second operating voltage to match the gate pulses to drive the pixels within the display panel. In addition, the first voltage control circuit generates a light source driving voltage by adjusting the output voltage. The backlight unit produces the light source required for the display panel. In an embodiment of the invention, the voltage supply unit includes a first voltage generator, a second voltage generator, and a second voltage control circuit. The first voltage generator is configured to generate a first operating voltage according to the output voltage. The second voltage generator is operative to generate a common voltage of the display panel in accordance with the output voltage. Furthermore, the second voltage control circuit generates a second operating voltage by adjusting the output voltage. 201011722 u/luieen'W 26407twf.doc/n In the embodiment of the present invention, the second voltage control circuit described above is identical to the internal structure of the it crying: 2 control circuit. In addition, the liquid crystal red is a timing controller. Wherein, the gate driver and the source driver (10) are controlled by the timing controller to cause the display panel to generate an image. The invention can generate the internal circuit of the liquid crystal display by using the group boosting circuit (4), for example, the voltage of the ϋ drive and the crane, the common voltage of the panel, and the series of driving LEDs. The liquid TFli of the present invention has the advantages of miniaturization and reduced manufacturing cost as compared with the prior art. The above and other objects, features and advantages of the present invention will become more apparent. [Embodiment] In the following description, in order to present the consistency of the description of the present invention, in the different embodiments, elements having the same or similar functions and structures will have the same component symbols and names. [First Embodiment] Fig. 2 is a diagram showing a system architecture of a liquid crystal display according to a first embodiment of the present invention. Referring to FIG. 2, the liquid crystal display 2 includes a display panel=10, a gate driver 220, a source driver 23A, a timing controller 240, a booster circuit 25A, a voltage supply unit 26A, and A backlight unit 270. Referring to FIG. 2 , the voltage supply unit 260 and the backlight unit 270 are electrically connected to the boosting circuit 250 . The gate driver 220 is electrically connected to the display panel 210 and the voltage supply unit 260. The source driver 230 is electrically connected to the display panel 210 and the voltage supply unit 260. In addition, the timing controller 240 is electrically coupled to the gate driver 220 and the source driver 230. Looking further, the display panel 210 includes a plurality of pixels (not shown). The voltage supply early element 260 includes voltage generators 261 and 262 and a voltage control circuit 263. Wherein the voltage generator 261 is electrically coupled to the boost circuit 250 and the gate driver 220. The voltage generator 262 is electrically coupled to the boost circuit 250. The voltage control circuit 263 is electrically connected to the boosting power circuit 250 and the source driver 230. On the other hand, the backlight unit 270 includes a plurality of light emitting diode strings 271 to 273 and a current driver 274. The first ends of the LED arrays 271 273 273 are electrically connected to the boosting circuit 25 〇 , and the second ends of the LED arrays 271 273 273 are electrically connected to the current driver 274 . Further, as shown in Fig. 2, the light-emitting diode strings 271 to 273 are each composed of a plurality of light-emitting diodes which are connected in series. In overall operation, boost circuit 250 is operative to increase the level of an input voltage ❹ Vin2 and to generate an output voltage ν 〇υ τ2. Thereafter, the voltage generator 261 generates an operating voltage in accordance with the output voltage ν 〇υ τ 2 . Another voltage generator 262 generates a common voltage vc 〇 M2 of the display panel 210 in accordance with the output voltage ν 〇υ τ 2 . The voltage control circuit 263 generates an operating voltage v 〇 p22 by adjusting the output voltage VOUT2. It is worth noting that the gate driver 22 will operate at the operating voltage Vop^ and the source driver 23 will operate at the operating voltage v〇p22. In other words, the voltage supply unit 260 produces 9 201011722 υ /1 υ i οοι ι W 26407 twf.doc/n the operating voltage Vom of the gate driver 220 and the operating voltage of the source driver mo according to the output voltage ν 〇υ τ 2 . V〇p22 and the common voltage Vc〇M2 of the panel. In this way, when the gate driver 220 and the source driver 230 are respectively enabled by the operating voltages Vopm and ν〇ι 22, the gate driver 220 and the source driver 230 are transmitted according to the timing controller 240. a signal to cause the display panel 210 to generate an image. The gate driver 22 产生 generates a plurality of gate pulses, and the gate pulses sequentially turn on the pixels in the display panel 210 within one frame period. In contrast, the source drive number © 230 will cooperate with the gate pulses generated by the gate driver 220 to drive the pixels in the display panel 210 to cause the display panel 21 to generate an image. On the other hand, the light source required for display panel 210 during development is generated by Moonlight Early 270. It is to be noted that the backlight unit 270 drives the LED arrays 271 to 273 directly by the output voltage ν 〇υ τ 2 generated by the booster circuit 250. Further, when the backlight unit 27 is in the startup state in accordance with the output voltage VOUT2, the current driver 274 is used to generate and control the current flowing through the LED arrays 271 to 273. Thereby, the backlight unit 270 can control the characteristics of the lightness and the light uniformity of the light-emitting diode strings 271 to 273 by the current driver 274. Further, in a specific implementation, the designer can integrate the booster circuit 250 and the current driver 274 on a single wafer to thereby reduce the hard space of the liquid crystal display 200. In contrast, in order to further reduce the hard space of the liquid crystal display 200, the designer can also integrate the boosting circuit 25A, the current driver 274, and the voltage supply unit 26A on a single wafer. However, the above-mentioned integrated types are not intended to limit the present invention. Those skilled in the art can use 201011722 υ /1 υ 1881 i'W 26407twf.doc/n to change the integrated form of the liquid crystal display 200 according to the spirit of the present embodiment. . It is worth mentioning that the liquid crystal display 200 can generate the operating voltage VOP21 of the gate driver 220, the operating voltage VOP22 of the source driver 230, the common voltage vCC of the display panel, and the driving light by using only one set of the boosting circuit 250. The diodes 271 to 273 are required to output the electric dust VOUT2. Therefore, the liquid crystal display 2 has the advantages of miniaturization and reduced manufacturing cost as compared with the conventional technology. In order to make the spirit of the present embodiment more familiar to those skilled in the art, the internal structure of the voltage control circuit 263 and the booster circuit 250 will be further described below. Figure 3A is a circuit diagram showing the voltage control circuit in accordance with an embodiment of the present invention. Referring to FIG. 3A, the voltage control circuit 263 includes an amplifier 310, a resistor core, a ruler 4, and a capacitor q. The amplifier 31 has a positive input terminal, a negative input terminal and an output terminal. The first end of the resistor & is electrically connected to a ground terminal, and the second end thereof is electrically connected to the negative input terminal of the amplifier 31(). The first end of the resistor R2 is electrically connected to the negative input terminal of the amplifier 310, and the second end thereof is electrically connected to the output end of the amplifier 31A. Further, the first end of the resistor R_3 is electrically connected to the boosting circuit 25A, and the first side thereof is electrically connected to the positive input terminal of the amplifier 31A. The first end of the resistor r4 is electrically connected to the positive input terminal of the amplifier 31, and the second end thereof is electrically connected to the ground end. In addition, the first end of the capacitor Ci is electrically connected to the output end of the amplifier 310, and the second end thereof is electrically connected to the ground end. In the overall operation, the voltage control circuit 263 receives the output voltage ν 〇υ τ2 through the resistor R3 11 201011722 V / ΐ ν ΟΟΛ 1 and generates the operating voltage V 〇 P22 / through the output of the amplifier 31 其中, the resistors Ri ~ R4 and The amplifier 31〇 constitutes a negative feedback circuit. Thereby, the voltage control circuit 263 can adjust the ratio of the operating voltage v_ to the output voltage v0UT2 by the resistor RH14' having different resistance values, and further achieve stable control of the operating voltage v〇p22. Figure 3B depicts a circuit architecture of a voltage control circuit in accordance with another embodiment of the present invention. Referring to Fig. 3B, the voltage control circuit 263 includes a resistor Rs and a rule 6, a capacitor C2 and C3, a P-type transistor Th, and a Zener diode DZi. The first end of the resistor R5 is electrically connected to the boosting circuit 250. The source of the P-type transistor ΤΙ > ι is electrically connected to the second end of the resistor R5. Furthermore, the first end of the resistor Rg is electrically connected to the second end of the resistor Rs, and the second end thereof is electrically connected to the gate terminal of the p-type transistor ΤΡ. Capacitor C2 and resistor R6 are connected in parallel with each other. The cathode end of the Zener diode DZi is electrically connected to the gate terminal of the P-type transistor TP, and the anode end thereof is electrically connected to a ground terminal. The first end of the capacitor C3 is electrically connected to the 汲 极端 terminal of the p'-type transistor ,, and the second end thereof is electrically connected to the ground. In the overall operation, the voltage control circuit 263 receives the output voltage V〇ut2 through the resistor & and generates the operating voltage V〇P22 through the 汲 terminal of the p-type transistor ΤΡ. Wherein, the capacitor C2, the resistor R6 and the Zener diode DZ! are used to manipulate the operating bias of the p-type transistor ,1 such that the voltage control circuit 263 can stably output the operating voltage V〇p22 through the p-type transistor ΤΡ1. . 4 is a circuit diagram of a booster circuit according to an embodiment of the invention. 201011722 υ / ιυιοοιι W 26407twf.doc/n Composition. Referring to FIG. 4', the booster circuit 250 includes capacitors c; 4 and C5, an inductor, a switch SW, a diode Di, a feedback circuit 41A, and a pulse width modulation controller 420. The first end of the inductor L is used to receive the input voltage vINZ. The first end of the capacitor a is electrically connected to the first end ' of the inductor Li and the second end thereof is electrically connected to a ground end. Furthermore, the first end of the switch sWi is electrically connected to the second end of the inductor Li, and the second end thereof is electrically connected to the ground end. The anode end of the diode Di is electrically connected to the second end of the inductor Li, and the cathode end thereof is used to generate the wheel-out voltage VOUT2. The first end of the capacitor C5 is electrically connected to the cathode end of the diode crucible, and the second end thereof is electrically connected to the ground end. Further, the feedback circuit 41 is electrically connected to the cathode end of the diode 〇1. The pulse width modulation controller 42 is electrically connected to the feedback circuit 410. In overall operation, the pulse width modulation controller 42 is configured to generate a pulse width modulation signal SPWM4. The switch sWi adjusts the conduction state between the first end and the second end according to the pulse width modulation signal SPWM4. Therefore, when the switch SWi is turned on, the inductor L! will start to store energy through the ground path formed by the switch sWi ® . In contrast, when the switch SW! is turned off, the energy stored in the inductor Li is transmitted to the capacitor C5 through the diode. As the switch SW! is continuously turned "on" and "off", the boost circuit 25A causes the input voltage vIN2 to be boosted to the output voltage ν 〇υ τ2. In addition, the feedback circuit 1〇 generates a corresponding control signal SCT4 according to the level of the output voltage 22. The relative pulse width modulation controller 42 adjusts the operation of the pulse width modulation signal SpwM4 generated according to the control signal Sow. 13 201011722 〇/iu186uW26407twf.doc/n period. Thereby, the boost circuit 250 will utilize the feedback circuit 410 to achieve stable control of the output voltage V〇UT2. [Second Embodiment] Fig. 5 is a diagram showing the system architecture of a liquid crystal display according to a second embodiment of the present invention. Referring to Fig. 5, the main difference between the second embodiment and the first embodiment is the voltage control circuit 510 and the backlight unit 520 in the liquid crystal display 500. In particular, in the second embodiment, the voltage control circuit 510 is electrically coupled to the boost circuit 250. In addition, the voltage control circuit 51 generates a light source driving voltage Vled5 by adjusting the output voltage v0UT2. On the other hand, the backlight unit 520 includes a plurality of light emitting diode strings 521 to 523 and a current driver 5.24. The first ends of the LED arrays 521 523 523 are electrically connected to the voltage control circuit 510 , and the second ends of the LED arrays 521 523 523 are electrically connected to the current driver 524 . In the present embodiment, the backlight unit 520 drives the light-emitting diode series 521 to 523 by the light source driving voltage VLED5 generated by the voltage control circuit 51A. In addition, current driver 524 is used to generate and control the current flowing through light emitting diode strings 521-523. Thereby, the backlight unit 52A can control the characteristics of the luminance, light uniformity, and the like of the light-emitting diode strings 521 to 523 by the current driver 524. It is worth mentioning that, in a specific implementation, the internal architecture of the voltage control circuit 510 described in this embodiment may be the same as the internal architecture of the voltage control circuit 263. In other words, the voltage control circuit 51 of the present embodiment can be realized by those skilled in the art with reference to the circuit architecture described in FIG. 3A or FIG. 3B. 14 201011722 υ /1 υ i ooi 1W 26407twf.doc/n Further, the 'light-emitting diode series 521 to 523' shown in Fig. 5 can be composed of a plurality of light-emitting diodes connected in series. On the other hand, similar to the first embodiment, the second embodiment can also generate the operating voltage Vopn of the gate driver 220, the operating voltage vOP22 of the source driver 230, and the display panel by using only one set of boosting circuit 250. The common voltage VCOM2 and the light source driving voltage VygD5 required to drive the LED series 521 to 523.
綜上所述，本發明只需利用一組升壓電路就可產生液 晶顯不器之内部電路所需的電壓，例如：閘極驅動器與源極 驅動器的工作電壓、顯示面板的共同電壓以及驅動發光二 極體串列所需的電壓。因此，與習知技術相較之下，液晶 顯示器的電路佈局面積將可被縮減，進而有效地達到微型 化的優勢。此外，本發明也可降低液晶顯示器之使用零件 的數目，進而降低液晶顯示器的製作成本。 雖然本發明已以較佳實施例揭露如上，然其並非用以 限定本發明，任何熟習此技藝者，在不麟本發明之精神 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】 圖1為習知液晶顯示器的系統架構圖。 α圖2繪示為依據本發明第—實施例之液晶顯示器的系 統架構圖。 電路的 電路示為依據本發明—實施例之電壓控制 15 201011722 kj / luioon W 26407twf.doc/n 圖3B繪示為依據本發明另一實施例之電壓控制電路 的電路架構圖。 圖4繪示為依據本發明一實施例之升壓電路的電路架 構圖。 ^ 圖5繪示為依據本發明第二實施例之液晶顯示器的系 統架構圖。 ' 【主要元件符號說明】 100 :習知液晶顯示器 ® 110、210:顯示面板 120、220 .閘極驅動器 130、230 :源極驅動器 140、240 :時序控制器 151、152、250 :升壓電路 160 :電源模組 170、270、520 :背光單元 171〜173、271〜273、521〜523 :發光二極體串列 馨 174、274、524 :電流驅動器 200、500 :液晶顯示器 260 :電壓供應單元 261、262 :電壓產生器 263、510 :電壓控制電路 310 :放大器 410 :回授電路 420 :脈寬調變控制器 16 201011722 \j / iuiooixW 26407twf.doc/nIn summary, the present invention can generate the voltage required for the internal circuit of the liquid crystal display device by using only one set of boosting circuit, for example, the operating voltage of the gate driver and the source driver, the common voltage of the display panel, and the driving. The voltage required for the LEDs to be in series. Therefore, compared with the prior art, the circuit layout area of the liquid crystal display can be reduced, thereby effectively achieving the advantage of miniaturization. Further, the present invention can also reduce the number of parts used for the liquid crystal display, thereby reducing the manufacturing cost of the liquid crystal display. While the invention has been described above by way of a preferred embodiment, it is not intended to limit the invention, and the invention may be modified and modified in the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a system architecture diagram of a conventional liquid crystal display. FIG. 2 is a system structural diagram of a liquid crystal display according to a first embodiment of the present invention. The circuit of the circuit is shown as a voltage control in accordance with the present invention - an embodiment. 15 201011722 kj / luioon W 26407 twf.doc/n FIG. 3B is a circuit diagram of a voltage control circuit in accordance with another embodiment of the present invention. 4 is a circuit block diagram of a booster circuit in accordance with an embodiment of the present invention. Figure 5 is a diagram showing the system architecture of a liquid crystal display according to a second embodiment of the present invention. ' [Main component symbol description] 100 : Conventional liquid crystal display ® 110, 210: display panel 120, 220. Gate driver 130, 230: source driver 140, 240: timing controller 151, 152, 250: boost circuit 160: power supply modules 170, 270, 520: backlight units 171 to 173, 271 to 273, 521 to 523: light-emitting diodes 174, 274, 524: current drivers 200, 500: liquid crystal display 260: voltage supply Units 261, 262: voltage generators 263, 510: voltage control circuit 310: amplifier 410: feedback circuit 420: pulse width modulation controller 16 201011722 \j / iuiooixW 26407twf.doc/n
Rl〜R_6 .電阻 Cr-Q :電容 Li :電感 :開關 Di :二極體 TPi : P型電晶體 DZi :齊納二極體 VlNl、ViN2 :輸入電壓 Vddi _ •電源電壓 Vledi :南電壓 V〇pii、V〇pi2、V〇p2i、V〇p22 :工作電壓Rl~R_6.Resistance Cr-Q: Capacitor Li: Inductance: Switch Di: Diode TPi: P-type transistor DZi: Zener diode VlNl, ViN2: Input voltage Vddi _ • Supply voltage Vledi: South voltage V〇 Pii, V〇pi2, V〇p2i, V〇p22: operating voltage
Vc〇Ml、Vc〇M2 :共同電壓 V〇UT2 :輸出電壓Vc〇Ml, Vc〇M2: common voltage V〇UT2: output voltage
SpWM4 ： 脈波寬度調變訊號SpWM4 : Pulse width modulation signal
ScT4 :控制訊號 VLED5 :光源驅動電壓 17ScT4: Control signal VLED5: Light source driving voltage 17