2〇〇532632〇.〇〇6 九、發明說明： 【發明所屬之技術領域】 本發明疋有關於-種低耗電源極驅動電路架構，且 ^疋有關於-種適用於液晶顯示器的低耗電源極驅動電路 架構。 【先前技術】 圖1是液晶顯示器架構圖。請參照圖卜液 的顯示原理為利用薄膜電晶體削當開關，當間極驅^ 1〇4輸出信號使得薄膜電晶體1〇〇導通時，可由源極驅： 器102輸出影像資料至液晶，液晶則根據影像資 對應的變化。 相 圖2是圖1中之源極驅動器的方塊示意圖。請參照圖 2,液晶顯示器的源極驅動器1〇2包含有：移位暫 閂鎖器202、位準改變器2〇4、數位至類比轉換器2〇6及 輸出緩衝器208。移位暫存器2〇〇將接收到的數位影像資 料依序寫入閂鎖器202中，當閂鎖器202中儲存有一條水 平線的影像資料時，會將這些資料同時輸出至位準改變器 204,位準改變器204改變數位影像資料的電壓準位再輸 出至數位至類比轉換器206，數位至類比轉換器206接收 數位影像資料而輸出類比影像資料至輸出緩衝器2〇8，最 後由輸出緩衝器208將影像資料寫入至液晶，其中輸出緩 衝器208是由單增益負迴授運算放大器組成。 為了避免液晶產生離子效應，施加於液晶上的電壓信 2005¾繼 doc/006 ίί性必/貞不斷地改變’因此部份驅動電路如數位至類比 3轉換器及輸出緩_又可分為正極性及負極性兩種，如圖 ，正極性類比電路鳥及負極性類比電路遞。無論何 芦亟動方式，傳統的方法皆為提供相 同的·§區動‘ ^ ’但貫際上不同極性的操作電壓範圍是不同的。 2使不同極性的電路皆能正f地卫作，因此傳統做 壓操作範圍幾乎為單-極性的二倍，此種做法的缺 的雷移位暫存器3G2、3G4將輸入信號提升至相同 Ρπ% 位準在轉換時，將增加功率的消耗， ★ 一，電壓增加二倍，功率消耗將增加四倍。 M f二、考慮閘極寄生電容Cgs及Cgd，不同極性的數 iit轉換器使用姉的操作，—樣會增加動態功 ，$同極性的輸出緩衝器若使用相同的操作電 i離:;ΐΓ靜態功的的消耗，p=l*v，電壓增加二倍， 靜〜、力率消耗也會增加二倍。 極驅率之消耗’本發明揭露-種低耗電源 =動益的電路架構，可縮小不同極性位準改變号及類比 路成本的效果。 ^力^耗’進—步相降低電 【發明内容】 本發明的目的就是在提供一種適用於液晶顯示器上多 數個薄膜電晶體之源極的源極驅動器。 上之 本發明的又~目的3 4日. 多數個薄膜電晶體顯示器’至少包括 本發明提出種：;=及源極16動電路。 ;趙之源極的源極驅動器，此源二膜電 鎖:數=來二=; _的位準改變;==:::=， 準=== 應的二並輸J薄二：=成為相對 ;r_:====r 兮位魏錢料及接地電龜準之間，其中 路更分料有-正極性與-負極 器及====:_-準至負極及接地電壓位 改變㈣為二種以上時’提供至正極性位準 準且;於等=::::==接地· 變器及負極性類比電路的中電壓位準=== 2005^a?d •d〇c/〇〇6 位準的一半且小於電源電壓位準。 哭，^述之源極驅動器，其中閂鎖器其結構為二層閂鎖 第-層依序接收輸人的數位影像資料，其中數位 固一條水平線的影像資料並依_ ^鎖益接收完-條水平線的影像資料時，則將—條水 嘖接$像Ϊ料輸出至第二層問鎖器’而第一層閃鎖器繼 一條水平線資料輸出至位準改變器。 σ°寻 之數位至類比轉換11依極性不同區分為正極性及 ' °位至類比轉換器，正極性數位至類比轉換哭提供 性轉換’負極性— t依其輸出衫像貢料的電壓範圍又可分為正極性 衝裔及負極性輸出緩衝器。 、、 本么月提it{種適用於液晶顯示器上 ，之源極的源極驅動器，此電 =日: ;極性類比電路、以及第-位準改變器和第二=變 其中該正極性類比電路，_ -中電壓位準，接收伽瑪電壓旱、以及第 換成為相對應的類比影像資料，輸：至薄貝膜電 屋位準’接收-伽瑪電$及_數位影像資料，並 2005細 •doc/006 成為相對應的一類比影像資料， 極。第一位準改變器 4膜電晶體的源 電壓位準，用以接收一::資:源，準，以及第-中 壓位準’再輸出至正極性類比電路=位:像資料的， 杰，耦接接地電壓位準，以及第二”第一位準改變 -輸入資料，改變數位影像資料的】準’用以接收 負極性類比電路。 &位準’再輸出至該 上述之源極驅動器，並中卷 一 同時，第-中電屢位準為電源;屢:準二二m 電壓位準為電源電壓位準的一半。|的一+’而第二中 若第一與第二中電壓位準 為大於接地電壓位準且小於等於第一中霞位準 W準為大於==位準™ 源電壓位準。 寻、電/原電堡位準的-半且小於電 上述之源極驅動器之正極性類比 轉換器及輸出緩衝器組成。A 自數位至類比 迴授運算放大器組成之正極性==器是由單增益負 轉換，位至類比 迴授運，-成之C:器是由單增益負 多數極驅動器’適用於液晶顯示器上 夕數個賴電日日體之源極。源極驅 性類比電路、負極性類比電路 几括.極 準改變器。正極性類比電路紅 位準改變器與第二位 路耦接於電源電壓位準，接收一 20053觀?< doc/006 $瑪電壓及數位影像資料，並將其轉換成為相對應的類比 資料，輸出至該些薄膜電晶體的源極。負極性類比電 路’耦接一接地電壓位準，接收伽瑪電壓及數位影像資料， 並將其轉換成為相對應的類比影像資料，輸出至該些薄膜 電晶體的源極，其中正極性類比電路的接地端與負極性類 比電路的電源電壓端連接在一起。第一位準改變器，耦接 電源電壓⑽以及第—中電壓位準，用哺收輸入資料， 改邊，位影像資料的電壓位準，再輸出至該正極性類比電 路。第二位準改變器耦接接地電壓位準以及一第二中電壓 ^準，用以接收—輸人資料，改變數位影像資料的電壓= > ，再輸出至該負極性類比電路。 依照本發明的較佳實施例所述之一種液晶顯示器 迷之液晶顯示器至少包括：多數個皆具有閘極、源極、以 ^及極的薄膜電晶體、祕於多數個薄膜電晶體之閘極， 用以輸出信號使薄膜電晶體導通的閘極驅動電路；以 =動電路’適用於液晶顯示器中之多數個薄膜電晶體= =之源極驅動電路’此驅動電路係至少包括正極性類比 ^器負極性類比電路、以及第—位準改變器和第二位準 一由其t之正贿類比電路，祕電源電壓料，以及第 轉’接修瑪電壓及數位影像資料，並將复轉 =相對應的類比影像資料，輸出至薄膜電晶體的源 魅里圣性類比電路，耗接接地電壓位準，以及第二中電 ^準，接收伽瑪電壓及數位影像資料，並將其轉換成2 2005獅 rdoc/〇〇6 相對應的類比影像資料 位準改變器，轉接雷调二輸出至薄膜電晶體的源極。第一 用以接收輪入資：：；壓位準’以及第-中電壓位準， 出至正極性類比電路。=數位影像資料的電麼位準，再輸 電壓位準’以及該第二中位準改變器，接接地 改變數位影像資料 ^準’用以接收輸入資料， 路。 位準，再輸出至該負極性類比電〇〇532632〇.〇〇6. Description of the invention: [Technical field to which the invention belongs] The present invention relates to a kind of low-power power source driving circuit architecture, and it relates to a kind of low-power suitable for liquid crystal display. Power pole drive circuit architecture. [Prior Art] FIG. 1 is a structural diagram of a liquid crystal display. Please refer to the liquid crystal display principle to use a thin film transistor to cut the switch. When the gate driver ^ 104 output signal makes the thin film transistor 100 on, the source driver can output image data to the liquid crystal. According to the corresponding change of the image data. Phase diagram 2 is a block diagram of the source driver in FIG. Please refer to FIG. 2. The source driver 102 of the liquid crystal display includes: a shift latch 202, a level changer 204, a digital-to-analog converter 206, and an output buffer 208. The shift register 200 sequentially writes the received digital image data into the latch 202. When a horizontal line image data is stored in the latch 202, these data are simultaneously output to the level change The converter 204 and the level changer 204 change the voltage level of the digital image data and output it to the digital-to-analog converter 206. The digital-to-analog converter 206 receives the digital image data and outputs the analog image data to the output buffer 208. Finally, The image data is written into the liquid crystal by an output buffer 208, where the output buffer 208 is composed of a single-gain negative feedback operational amplifier. In order to avoid the ionic effect of the liquid crystal, the voltage signal applied to the liquid crystal 2005 ¾ will continue to change after doc / 006 'Therefore, some drive circuits such as digital to analog 3 converters and output slow_ can be divided into positive polarity And negative polarity, as shown in the figure, the positive polarity analog circuit bird and the negative polarity analog circuit pass. Regardless of the emergency mode, the traditional method is to provide the same § zone operation ^ ^ but the operating voltage range of different polarities is different. 2 Make the circuits of different polarities all work positively, so the range of traditional pressure operation is almost double that of unipolar. The lack of mine shift registers 3G2 and 3G4 of this method will increase the input signal to the same. When the Pπ% level is converted, the power consumption will increase. ★ First, if the voltage is doubled, the power consumption will be increased by four times. M f Second, considering the gate parasitic capacitances Cgs and Cgd, digital iit converters of different polarities use the same operation, which will increase the dynamic power. If the output buffers of the same polarity use the same operation ionization:; 离 Γ Consumption of static work, p = l * v, voltage doubled, static ~, power consumption will also double. Consumption of polar drive rate ’The present invention discloses a circuit structure with low power consumption = dynamic benefits, which can reduce the effect of changing the number and analog circuit cost of different polarity levels. ^ Power ^ Consumption '-Progressive Phase Reduction [Abstract] The object of the present invention is to provide a source driver suitable for the source of a plurality of thin film transistors on a liquid crystal display. The above is another ~ objective of the present invention. The majority of thin film transistor displays include at least the present invention; and = 16 source circuits. ; Zhao Zhiyuan's source driver, this source has two membrane electric locks: number = 来 二 =; _ the level of _ changes; == ::: =, quasi === should be the same and lose J thin two: = become relative ; r _: ==== r Xi Weiwei materials and grounding turtle standards, which are divided into -positive polarity and -negative device and ====: _- quasi to negative and ground voltage level change ㈣ When there are more than two types, 'provide to the positive polarity level and; equal to = :::: == ground voltage level of the transformer and negative polarity analog circuit === 2005 ^ a? D • d〇c / 〇〇6 level is less than the power supply voltage level. Cry, the source driver described above, where the latch is structured as a two-layer latch and the first layer sequentially receives the input digital image data, in which the digital image data of a horizontal line is fixed and received in accordance with _ LOCK benefits finished- When the image data of a horizontal line is provided, a water line is output to the second level interlocking device, and the first level flashing device outputs a level line data to the level changer. σ ° Digital to analog conversion 11 Differentiated into positive polarity and '° to analog converter according to different polarities, positive digital to analog conversion provides positive conversion' negative polarity — t according to the voltage range of its output shirt. Can also be divided into positive polarity and negative polarity output buffer. This month, it ’s a kind of source driver that is suitable for LCD monitors, the source = this: the polarity analog circuit, and the -th level changer and the second = change the positive polarity analog Circuit, _-medium voltage level, receive the gamma voltage drought, and change to the corresponding analog image data, input: to the thin film electric house level 'receive-gamma electricity $ and _ digital image data, and 2005 Fine • doc / 006 became a corresponding analog video data, extremely. The first voltage level of the 4th transistor of the first level changer is used to receive one ::: source, standard, and the -medium voltage level 'and then output to the positive analog circuit = bit: like the data, Jie, coupled to the ground voltage level, and the second "first level change-input data, change the digital image data" standard 'for receiving negative polarity analog circuits. &Amp; level' and then output to the above source Pole driver, and the middle of the first volume, the first-China Power repeatedly level as the power supply; repeatedly: the quasi 22 m voltage level is half of the power supply voltage level. | 'S a +' and the second middle if the first and the first The second middle voltage level is greater than the ground voltage level and less than or equal to the first middle Xia level. The W level is greater than == level ™ source voltage level. The source driver consists of a positive-polarity analog converter and an output buffer. A positive-polarity consisting of a digital-to-analog feedback operational amplifier == The converter is a single-gain negative conversion, which is a bit-to-analog feedback operation. The driver is a single-gain negative majority driver 'suitable for several days on the LCD monitor The source of the body. The source-driven analog circuit and the negative-polarity analog circuit are included. The quasi-changer. The positive-polarity analog-circuit red-level changer and the second bit are coupled to the power supply voltage level. < doc / 006 $ Ma voltage and digital image data, and convert it into corresponding analog data, and output it to the source of these thin film transistors. The negative polarity analog circuit is coupled to a ground voltage level to receive Gamma voltage and digital image data are converted into corresponding analog image data and output to the source of these thin film transistors, where the ground terminal of the positive polarity analog circuit and the power voltage terminal of the negative polarity analog circuit are connected at Together. The first level changer is coupled to the power supply voltage ⑽ and the first-middle voltage level. It feeds input data, changes the edge, and sets the voltage level of the image data, and then outputs it to the positive analog circuit. Second The level changer is coupled to the ground voltage level and a second medium voltage level for receiving-inputting data, changing the voltage of the digital image data = > and outputting it to the negative analog circuit A liquid crystal display for a liquid crystal display fan according to a preferred embodiment of the present invention includes at least: a plurality of thin film transistors having a gate electrode, a source electrode, a gate electrode, and a plurality of thin film transistor gates. A gate driving circuit for outputting a signal to make a thin film transistor conductive; a driving circuit that is suitable for most thin film transistors in a liquid crystal display = a source driving circuit that = = This driving circuit includes at least a positive polarity analogy The negative polarity analog circuit, the first level changer and the second level are the positive analog circuit, the power supply voltage data, and the transfer voltage and digital image data. Transfer = the corresponding analog image data, output to the sacred analog circuit of the source transistor, consumes the ground voltage level, and the second CLP standard, receives the gamma voltage and digital image data, and It is converted into a 2 2005 lion rdoc / 〇06 corresponding analog image data level changer, and the thunder tone 2 is output to the source of the thin film transistor. The first is used to receive the round of funding ::; the voltage level ’and the -middle voltage level, which are output to the positive analog circuit. = The electrical level of the digital image data, and then the voltage level ’and the second mid-level changer, which is connected to ground to change the digital image data. ^ Standard’ is used to receive input data. Level, and then output to the negative analog
上述之液晶顯示哭，甘H 同時’第-中電壓位；為電-與第二中電壓位準相 電壓位準為電源電壓位準的：：錢準的-半’而第二中 右其令第一與第-cb + P 、 位準為大於接地電麼位查:準不相等時’第一尹· 丰·而笛- 士卡厂 -、於專於電源電塵位準的一 迴於谨管说+ ""輸出緩衝器是由單增益負 她運异放大心狀正極性輸出緩衝器。 上述之源極驅動器之負極性類比電路 轉換器及輸出緩衝器組成。其中輸出緩 η ，授運算放大器組成之負極性輪出緩衝器。本G因 =提供-種以上的中電壓位準至位準改變器及㈣緩衝 ，源極驅動㈣構，因此，在位準改變器方面，可 低操作電壓的震幅’將可大幅節省位準 比轉換器動態功率的消耗，另外在輸出緩衝器方面，亦可 11 2〇〇5ϋ_ f低操作電壓的震幅，也可節省輸出緩衝料靜態功率消 為讓本&明之上述和其他目的、特徵和優 =下了文特舉較佳實施例，並配合所附圖式，作詳2 【實施方式】 如月IJ述’為了避免液晶產生離子效應，施加於液 的電壓信號極性必須不斷地改變，因此部份驅動電路^數 可分為正極性及負極性兩 減故性’均提供相同的電壓源給 υ _，如接地電壓GND及電源電壓 ’為了使不同極性的電路皆能正常地作，因此傳 統做法的電壓操作範圍幾乎為為單-極性的二倍，如此不 j旦增加了位準改變H及触絲比轉換料態功率的 耗，也增加了輸出緩衝器靜態功率的消耗。 因此為了解決f知的問題，本發 地電麼GND及電源祕伽外，尚提供至少一==接 以減少操作電壓的變動振幅。 电& 又別述之問鎖器之結構可為二層問鎖器，第一層依 接收輸入的影像資料，當第一層 的影像資料時，則將資料輸出至 ：， _繼續接收下一條水平線 二二： 則將資料輸出至位準改變器。 弟一層閂鎖為 12 oc/006 20〇5 觀?d 的方：s依:=::較佳實施:的部她 如圖4所不，源極驅動器至少包括正極性 二:电406，耦接電源電壓位準VDD，以及第一中命 ，用以接收伽瑪電壓及數位影像資料，並將 ίΓ=Γ的類比影像資料’輸出至薄膜電晶體的 —=貞比電路408，搞接至接地電Μ位準⑽13 像資料、、^VM2，用以接收伽瑪電屋及數位影 薄膜電曰成為相對應的類比影像資料，輸出至 位準VDD以及第一中第電二丰』文:40田2’輕接電源電廢 料，冲辦去。 電屋位準乂⑽，用以接收一輸入資 Ϊ 路 以及第二中電壓:準VM2=::接:電壓:位準GND 變教仿岑梓次用以接收一輸入資料，並改 侧。〇料的電塵位準’再輸出至負極性類比電路 經由輸二^類比電路4〇6與負極性類比電路408會 及410分別輸出到奇 的資料線。藉由時序㈣以接山、貝鄕”偶數編號 定期間後，正極性_^垂β 、、、曰出）的控制，在經過一預 輸出合反II · 、電路406與負極性類比電路408的 1的極性類比電路梅與負極性類比電路 線與奇數編i、二身::級二出到偶數編號的資料 顯示出影像資料。、 π 復地進行，以驅動面板來 上述之正極性類比電路可以例如由一正極性數位至類 13 20053i2&l?doc/006 類!極性輸出緩衝騎組成，其中正極性數位至 、=乂例如由-單增益負迴授運算放大器組成。另外，上 電路可以例如由負極性數位至類比轉換器及 成’其中負極性數位至類比轉換器提 ^衫像貢料轉換。負極性類比電路中的輸出緩衝哭 例如單增益負秘運料大驗成◎極性= 如上所述，正極性類比電路406以及第一位準改變器 402的電壓源是在電源電壓vdd與第—中電壓位準懷1 之間，所以其變動幅度為VDD-VM1，遠小於習知的 VDD-GND。此外，負極性類比電路權以及第二位準改 變為侧#電壓源是在電源電M VDD與第二中電壓位準 VM2之間，所以其變動幅度為VM2_gnd，也是遠小於 白知的VDD-GND。因此，正與負極性類比電路4〇6、4〇8 、及第與第_位準改變恭402、404的操作電壓變動振 幅均被大大地降低。 圖5繪示依照本發明另一較佳實施例的部分源極驅動 器的方塊示意®。目5的電路_與圖4的電路架構的差 異點在於中電壓位準僅提供給第一與第二位準改變器 402、404，而正與負極性類比電路4〇6、4〇8則不提供中 電壓電位VM1、VM2。 如圖5所示，正極性類比電路4〇6原本連接接地電壓 之處與正極性類比電路406原本連接電源電壓之處被連接 2005獅_ ^起’而不提供額外的接地與電源電壓給正與負極性類 比電路406、408。依據此種電路結構，正負極今 :以被回收而再次利用。例如，在顯示器顯示時的某：： 旦面下，電流從面板流到正極性類比電路4〇6。此 ^ 需^負極性類比電路儀提供電流給面板時，電流便二 =正極性類比電路概提供，以達到回收電荷之目的盘 ^果’電路可以不必再提供任何電荷，故可以達到省紐 果。 依據本發明，中電壓位準的設定係如下所述。若 壓^準為單—電壓源時，亦㈣—巾電壓位準彻盘第 -中電壓位準VM2相同時，第—與第二中電壓位準 VM1-VM2便可以設定成例如VDD/2，。此外，若為二 ，以上不同的電壓源時’亦即在此實施例為第—中 準νΜ1不等於第二中電壓位準彻時，第一中電壓位 ，讀1的範圍係设定在大於GND且小於等於; 第一中電壓料喊關狀在大於特vDD/2且小於 VDD。而數位至類比轉換器的電壓操作範圍將因不同極 性時’位準㈣H輸出電壓振幅崎低而減小。 由於動態功率祕㈣c*v2，其中f為信號操作的 ’ C為負載電容’ v為操作電壓振幅，因此降低操作 電壓的振幅將可大幅節省位準改㈣及餘至類比轉換器 動態功率的消耗。 σ ρ-ι*$外^輸出緩衝器方面，運算放大器的靜態功率消耗 1 V，其中I為電流’ ν為操作電壓，因此降低操作電 2005购 doc/006 壓的振幅，也可節省輸出緩衝器的靜態功率消耗。 如此將可縮小不同極性位準改變器及類比電路的 電壓振幅，不但減少了位準改變器的動態功率消耗，而且 同時減少了類比電路的動態及靜態功率消耗。也 份電路的錢缝降低，又可選輕舊電路元件 1 步達到降低電路成本的效果。 雖然本發明已以較佳實施例揭露如上，然其並 ，定本發明’任何熟習此技藝者，在不脫離本發明之 和蛇圍内’當可作些許之更動與潤飾，因此本發明 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是液晶顯示器架構圖。 圖2是源極驅動器方塊圖。 圖3是習知的驅動電路圖。 驅動器 圖4繪不依照本發明一較佳實施例的部分源極 的方塊不意圖。 圖5繪示依照本發明另 器的方塊示意圖。 一較佳實施例的部分源極驅動 【主要元件符號說明】 100 ·薄獏電晶體陣列，1〇2 :源極驅動器， 104:閘極驅動器，200:移位暫存器，加 2〇4 :位準改變器，施：數位至類比轉換器，、益 16 2005¾ 觀 208 :輸出緩衝器，302 :第一位準改變器， 304 :第二位準改變器，306 :正極性類比電路， 308 :負極性類比電路， 402 :第一位準改變器， 4〇4 :第二位準改變器， 406 :正極性類比電路， 408 :負極性類比電路。 410 :輸出級 17The above liquid crystal display is crying, Gan H is at the same time as the "first-middle voltage level; it is the voltage level between the electrical-and second-middle voltage level and the power-supply voltage level: Qian Qian-half" and the second middle-right one Let the first and the first -cb + P, the level is greater than the grounding power. Check: when the accuracy is not equal, the first one is "Yin · Feng · Er Di-Shika Factory-", one time specializing in power dust level. Yu Jinguan said that the "" output buffer is a positive output buffer with a single positive and negative gain. The negative polarity analog circuit of the above source driver is composed of a converter and an output buffer. Among them, the output is slow η, which is a negative polarity round-out buffer composed of an operational amplifier. This G = provides more than one kind of medium voltage level to level changer and ㈣ buffer, source drive mechanism. Therefore, in the level changer, the low amplitude of the operating voltage can greatly save the position The dynamic power consumption of the quasi-ratio converter, in addition to the output buffer, can also reduce the amplitude of the low operating voltage 11 2 0 5 ϋ _ f, can also save the static power of the output buffer to eliminate the above and other purposes of this & Features and advantages = The following describes the preferred embodiment of Wen Wen, with the accompanying drawings, detailed 2 [Embodiment] As described in the IJ'In order to avoid the ionic effect of the liquid crystal, the polarity of the voltage signal applied to the liquid must be constantly Change, so part of the driving circuit can be divided into positive polarity and negative polarity. Both provide the same voltage source to υ_, such as ground voltage GND and power supply voltage. Therefore, the voltage operating range of the traditional method is almost double that of the uni-polarity. In this way, the power consumption of the level change H and the wire-to-wire ratio are changed, and the static power of the output buffer is also increased. Consumption. Therefore, in order to solve the problem of f, in addition to the ground power GND and the power supply, at least one == connection is provided to reduce the fluctuation amplitude of the operating voltage. The structure of the locker can be a two-layer locker. The first layer receives the input image data. When the image data of the first layer, the data is output to :, _Continue to receive One horizontal line 22: The data is output to the level changer. The first layer of the latch is 12 oc / 006 20〇5. The formula of s: s according to: = :: better implementation: as shown in Figure 4, the source driver includes at least positive polarity 2: electric 406, coupling Connected to the power supply voltage level VDD and the first hit, used to receive the gamma voltage and digital image data, and output the analog image data of Γ = Γ to the thin-film transistor's-= zhenbi circuit 408, to The ground voltage M level ⑽13 image data, ^ VM2, is used to receive the gamma video room and digital film film become corresponding analog image data, and output to the level VDD and No. 1 and No. 2 electric power. 40 Tian 2 'light access to power and electrical waste, rush to do. The electrical house level is used to receive an input data path and the second middle voltage: quasi VM2 = :: connect: voltage: level GND. The zenith is used to receive an input data and change it. 〇The electric dust level of the material is output to the negative polarity analog circuit. The analog circuit 406 and the negative polarity analog circuit 408 and 410 are respectively output to the odd data line through the input analog circuit 406. By the sequence of “even-numbered”, even-numbered fixed period, the positive polarity _ ^ vert β (, β, ,,, and) is controlled, after a pre-output inversion II ·, circuit 406 and negative polarity analog circuit 408 The polar analog circuit of 1 and the analog circuit of negative polarity and the odd-numbered code i, two body :: level two out to the even-numbered data show the image data., Π is repeatedly performed to drive the panel to the above positive polarity analogy The circuit can be composed of a positive polarity digital to class 13 20053i2 & l? Doc / 006, for example, a polar output buffer ride, where the positive polarity digital to, = 乂, for example,-a single-gain negative feedback operational amplifier. In addition, the circuit For example, a negative-polarity digital-to-analog converter and a negative-polarity digital-to-analog converter can be used to convert images. The output buffer in the negative-polarity analog circuit can be tested, for example, a single-gain negative secret material. = As mentioned above, the voltage source of the positive polarity analog circuit 406 and the first level changer 402 is between the power supply voltage vdd and the first-middle voltage level, so the variation range is VDD-VM1, which is much smaller than that of Xi. know VDD-GND. In addition, the negative polarity analog circuit weight and the second level are changed to the side # The voltage source is between the power supply M VDD and the second middle voltage level VM2, so its fluctuation range is VM2_gnd, which is also much smaller than white Therefore, the amplitudes of the operating voltage fluctuations of the positive and negative analog circuits 406, 408, and the first and fourth level changes 402, 404 are greatly reduced. Figure 5 shows the A block diagram of a part of a source driver according to another preferred embodiment of the present invention®. The difference between the circuit of FIG. 5 and the circuit architecture of FIG. 4 is that the middle voltage level is only provided to the first and second level changers 402. , 404, while the positive and negative analog circuits 4 06 and 4 0 do not provide the medium voltage potential VM1, VM2. As shown in Figure 5, the positive analog circuit 4 06 was originally connected to the ground voltage and the positive analog The circuit 406 was originally connected to the power supply voltage from 2005. It does not provide additional ground and power voltage to the positive and negative analog circuits 406, 408. According to this circuit structure, the positive and negative electrodes are now: Reuse. For example, when the display shows A :: Under the current, the current flows from the panel to the positive-polarity analog circuit 406. When the negative-polarity analog circuit instrument provides current to the panel, the current will be provided by the positive-polarity analog circuit to recover the charge. The purpose of the circuit can be achieved without providing any charge, so it can reach the province of New Zealand. According to the present invention, the setting of the middle voltage level is as follows. If the voltage is a single-voltage source, also- When the towel voltage level is the same as the second-medium voltage level VM2, the first- and second middle voltage levels VM1-VM2 can be set to, for example, VDD / 2. In addition, if it is two or more different voltage sources 'That is, in this embodiment, when the first medium voltage vM1 is not equal to the second medium voltage level, the first medium voltage level. The range of reading 1 is set to be greater than GND and less than or equal to; The off state is greater than vDD / 2 and less than VDD. The digital-to-analog converter voltage operating range will be reduced due to the variability of the 'level ㈣H output voltage amplitude at different polarities. Since dynamic power is c * v2, where f is the signal operation, 'C is the load capacitance', and v is the operating voltage amplitude, reducing the amplitude of the operating voltage will greatly save the level change and the power consumption of the analog converter. . σ ρ-ι * $ out ^ In terms of output buffer, the static power consumption of the operational amplifier is 1 V, where I is the current 'ν is the operating voltage, so reducing the amplitude of the operating voltage 2005 doc / 006 voltage can also save the output buffer Power consumption of the device. In this way, the voltage amplitudes of the level changers and analog circuits of different polarities can be reduced, which not only reduces the dynamic power consumption of the level changers, but also reduces the dynamic and static power consumption of the analog circuits. It also reduces the cost of the circuit, and you can choose to lighten the old circuit components in one step to reduce the cost of the circuit. Although the present invention has been disclosed as above with the preferred embodiment, but also, it is determined that the present invention "any person skilled in the art can be changed and retouched without departing from the scope of the present invention, so the scope of the present invention should be Subject to the scope of the attached patent application. [Brief description of the figure] Fig. 1 is a structural diagram of a liquid crystal display. Fig. 2 is a block diagram of a source driver. Fig. 3 is a conventional driving circuit diagram. Fig. 4 of the driver illustrates a part of a source electrode not according to a preferred embodiment of the present invention. The block diagram is not intended. Figure 5 shows a block diagram of another device according to the present invention. Partial source drive of a preferred embodiment [Explanation of Symbols of Main Components] 100 · Thin crystalline transistor array, 102: source driver, 104: gate driver, 200: shift register, plus 204: level changer, Shi: digital-to-analog converter, Yi 16 2005 ¾ View 208: output buffer, 302: first level change 304: second level changer, 306: positive polarity analog circuit, 308: negative polarity analog circuit, 402: first level changer, 404: second level changer, 406: positive polarity analog Circuit, 408: negative analog circuit. 410: output stage 17.