201128600 HM-2009-0029-TW 31611 twf.doc/n 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種源極驅動器，且特別是有關於— 種位移驅動電壓的電壓準位的源極驅動II。 ' 【先前技術】 在現今資訊社會中’隨著資訊傳播媒體及各種電子顯 示裝置被廣泛應用於工業用裝置或家用設備，使得電子^ 示裝置越來鋪得重要。電子顯轉置更持續地更新 以適用於資訊社會中各種需求的功能。 -般而言’電子齡裝置齡鱗輸各射訊給利用 這些資訊的使用者。意即，這些電子顯示裝置將電子資訊 信號轉換成使用者視覺上可辨識的光學資訊信號。 在目前的顯示裝置或系統，像是映像管顯示器 (Cathode-Ray Tube，CRT)或是液晶顯示器(Liquid Crystal201128600 HM-2009-0029-TW 31611 twf.doc/n VI. Description of the Invention: [Technical Field] The present invention relates to a source driver, and in particular to a voltage level of a displacement driving voltage Source Drive II. [Prior Art] In today's information society, as information media and various electronic display devices are widely used in industrial devices or household appliances, electronic devices are becoming more and more important. Electronic display transpositions are more continuously updated to suit the various needs of the information society. In general, the electronic age device is sent to each user to use this information. That is, these electronic display devices convert electronic information signals into optical information signals that are visually identifiable by the user. In current display devices or systems, such as a Cathode-Ray Tube (CRT) or a Liquid Crystal Display (Liquid Crystal)
Display，LCD)，其輸入電壓及顯示輪出之間並砟線性關 係，並且輸入電壓及顯示輸出之間的關係透過伽瑪曲線 (gamma curve)來描述。以液晶顯示器而言，則可透過伽 瑪曲線找到對應各灰階的輪出電壓（亦即伽瑪電壓），利 用這些伽瑪笔壓控制液晶面板顯示正確的灰階，則液晶顯 示器可正確的顯示影像。 為了改良液晶顯示器的顯示效果，有些液晶面板會將 像素切割為兩個子像素。而兩個子像素由於電路結構的關 係，其共同電壓的準位可能會不同。在此情況之下，利用 201128600 HM-^uu9-0029-TW 3161 ltwf.doc/n 同樣的伽瑪電壓控制液晶面板時，可能會造成兩個子像素 顯不的效果不-樣，因而影響到顯示的品質。因此，要在 不同的子像素顯示相同的效果時，輸出的伽瑪電壓的準位 ::不同。也就是說’在某些晝素顯示相同的效果時，必 須接收位移後的伽瑪電壓。 圖1為-傳統源極驅動器的電路示意圖。請參照圖卜 在源極驅動器1GG中，通道緩衝器11()用以對參考電塵 • GMAH位移一個位移電壓Δν後輸出，其中通道缓衝器U0 由運鼻放大ϋ及多個電阻&所域，其電路躺比減法器 相似。同樣地，通道緩衝器120會對參考電壓GMAL位移 -個位料壓Δν輸出，其中通道緩衝器12G由運瞀放大哭 及多個電阻汉所組成，其電路與類比減法器相似。而電;; AR1〜AR64在接收到位移後的參考電壓gmah及⑽仏 後’對其進行分壓以輸出位移後的伽瑪電壓〜。 數位類比轉換器130騎擇輸出伽瑪電壓Av〇〜Αγ63其中 之一作為驅動電壓。 ’傳統的祕驅動ϋ需要同時對參考電壓gmah 及GHA^進行位移，亦即通道緩衝器11〇及i2〇須同時作 用，才能同步位移伽瑪電壓AV〇〜AV63的電壓準位。此 彳，由於通道緩衝H 11()及12㈣運算放大器會有偏移的 見象β所以通道緩衝益ho的輸出電壓與參考電壓 間的壓差可能不等於位移電壓Δν，並且通道緩衝器12〇 白:輸出電壓與參考電壓及GMAL間的壓差可能不；於位 移電壓Δν。藉此，伽瑪電麗AV0〜AV63的電壓準位可能 201128600 HM-20〇y-y〇29-TW 31611 twf.doc/πDisplay, LCD), the input voltage and the display wheel are linearly connected, and the relationship between the input voltage and the display output is described by a gamma curve. In the case of a liquid crystal display, the gamma curve can be used to find the voltage of the corresponding gray scale (ie, the gamma voltage). By using these gamma pen pressures to control the liquid crystal panel to display the correct gray scale, the liquid crystal display can be correct. Display images. In order to improve the display of the liquid crystal display, some liquid crystal panels cut the pixels into two sub-pixels. The two sub-pixels may have different levels of common voltage due to the structure of the circuit. In this case, when the LCD panel is controlled by the same gamma voltage of 201128600 HM-^uu9-0029-TW 3161 ltwf.doc/n, the effect of the two sub-pixels may not be displayed, thus affecting The quality of the display. Therefore, when the same effect is displayed in different sub-pixels, the level of the output gamma voltage is different. In other words, when some pixels display the same effect, the gamma voltage after the displacement must be received. Figure 1 is a circuit diagram of a conventional source driver. Referring to FIG. 2b, in the source driver 1GG, the channel buffer 11() is used to output a reference voltage Δν to the reference electric dust GMAH, wherein the channel buffer U0 is amplified by the nose and a plurality of resistors & In the domain, the circuit is similar to the subtractor. Similarly, the channel buffer 120 outputs a displacement of the reference voltage GMAL - a bit material pressure Δν, wherein the channel buffer 12G is composed of a plurality of resistors and a plurality of resistors, the circuit of which is similar to the analog subtractor. And; AR1 to AR64, after receiving the shifted reference voltages gmah and (10), are divided to output the shifted gamma voltage ~. The digital analog converter 130 rides one of the output gamma voltages Av 〇 Α γ 63 as a driving voltage. The conventional secret driver needs to simultaneously shift the reference voltages gmah and GHA^, that is, the channel buffers 11A and i2 do not have to be used simultaneously to synchronously shift the voltage levels of the gamma voltages AV〇 to AV63. Therefore, since the channel buffers H 11() and 12 (four) operational amplifiers have an offset β, the voltage difference between the output voltage of the channel buffer and the reference voltage may not be equal to the displacement voltage Δν, and the channel buffer 12〇 White: The voltage difference between the output voltage and the reference voltage and GMAL may not be; the displacement voltage Δν. By this, the voltage level of gamma electric AV0~AV63 may be 201128600 HM-20〇y-y〇29-TW 31611 twf.doc/π
非平均地位移 【發明内容J 本發明提供一種源極驅動器源極驅動器， 電壓的電壓準位。 ° 位移驅動 本發明提供一種源極驅動器，其包括第一電 第一數位類比轉換器及通道緩衝器。第—電阻串，串列、 個串聯的電阻，第—電阻串列的每—電阻提供包括多 :電-數位類比轉換器_第_電阻， 阻。第-數位類比轉換器依據-資料碼輪出此些u 供的此些伽瑪電壓的其中之—作為第— Ή斤k 衝器耗接第-數位類比轉換器的輪出端，以對^道緩 壓的電壓準位進行位移並輸出第二輪出電壓。〜輸出電 在本發明之-實施例中，上述之通道缓衝 出電壓的電壓準位位移—個位移電壓。 十弟-輸 林7之-實_巾，上述之通道緩魅包 阻、第二電阻、第三電阻及第四電阻； 輸=。第-電阻的-端接收位移電 ^弗電阻的另一端耦接運算放女哭沾洛认、 電阻的一端耦接收運算放大哭 。'、㊉-端。第二 一端_運算放大器的輸^。而’第二電阻的另 -數位類比轉換器的輸出端，第=接收第 輸入端，第四電阻的另1接算放大器的正 201128600 mvi-zuu9-0029-TW 31611 twf.doc/n 牡+贫明之一貫施例中，上述之第—電阻、第二 阻·、第二電阻及苐四電阻的電阻值相同。 在本發明之-實施例中，源極驅動器更包括第 類比轉換器，其依據一控制碼輸出位移電壓。 ^本發明之—實補中’上述之第二數鋪比轉換哭 包括第二電阻串列及多個關。第二電阻串列包個: 聯的電阻，第二電阻串列的每1阻提供—對應的分麗。 ㈣開據㈣碼麟上述转的其巾之—作為位移電 壓。 在本發明之—實施例中，上述之第二電阻串列的第— :=第:=電壓，第二電阻串列的第二端接收第二輸 入電壓，其中苐-輸人電壓大於第二輪人電壓。 在本發明之—實施例中，上述之第—電阻串列的第— 2”：參考電壓，第一電阻串列的第二端接收第二參 考電麼’其中第—參考電壓大於第二參考電壓。 .在本發明之—實施例中，源極驅動 位類比轉換H，其中電流式數位誠 式數 輸出-位&電4。並且’通道緩_包括運算放大 阻。運算放大器輸出第二輸出電壓，其中 =電 輸入端耦接第一數位類比轉換器的輸出 :β白'正 接運算放大器的負輸人端及接收位移it ;阻的一频 搞接運算放大器的輸出端及輸出第二輪出電】阻的另端 在本發明之一實施例中，源極驅動器t 流轉換器，其中電㈣電流轉換器將參考電 201128600 HM-2U〇y-u029-TW 31611twf.doc/n =流且電流式触錢轉鋪基於參考電流輸出位 電阻在本發明之—實施例中，上述之電壓轉電流轉換器為 在本發明之一實施例中’上述第--輸出電壓。 輸出電壓小於第 在本發明之一實施例中，上述 -輸出電壓。 輸出電壓大於第 基於上述，本發明實施例的源極 選擇位移電壓的大小，並依據位移電壓二== 的準位，以調整液晶的顯示效果^ 源極驅動器可依據控制碼產生位:的 透過位移第二輸出電ΐ使3::门晶的齡效果。藉此， 示出相似或相同的㈣共同電壓準位的晝素能顯 為讓本：明之上述特徵和優點能更明顯易懂，下文特 牛貝化例’並配合所關式作詳細㈣如下。 、 【實施方式】 第一實施例 圖。ί失2日=據=發日月第—實施例_極驅動器的電路 =一:钱圖2 ’源極驅_ 2〇〇包括第一電阻串列训、 位類比轉換器220、通道缓衝器230及第二數位類 5〇。第—電阻串列210包括多個串聯的電阻 麗28岘。。_ 3i— =〜R64，亚且第-電阻串列21〇的第一端a接收第一參 考電壓GMAH，第一電阻串歹,Ul〇的第二端B接收第二參 考電壓GMAL，其中第_參考電壓GMAH大於第二參考 電f GMAL。電阻ri〜r64會對第一參考電壓〇μαη與第 二參考電壓GMAL之_轉騎純，讀好個分壓 作為伽瑪電壓V0〜V63。 第一數位類比轉換器220耦接第一電阻串列21〇的電 • 阻R1〜R64°第一數位類比轉換器220依據資料碼CA輸出 伽瑪電壓VG〜V63的其中之—作為第—輸出電壓V說，而 此時=-輸出電壓VDac並非驅動電壓。通道缓衝器23〇 輕接第-數位類比轉換器22〇的輸出端222。通道缓衝器 230包括運异放大器240及電阻Ra、Rb、Rc、Rd。第— 電阻Ra的-端接收位移電壓Δν，第—電阻以的另一端 輕接運算放大器240的負輸入端。第二電阻处的一端輕 接收運异放大益240的負輪入端，第二電阻^^的另一端 耦接運算放大器240的輸出端。第三電阻Rc的〆端耦接 收第一數位類比轉換器220的輪出端，第三電阻Rc的另 —端耦接運算放大器240的正輸入端。第四電阻Rd的一 端耦接該運算放大器240的正輸入端，第四電阻Rd的另 —端接收參考電壓VREF’其中參考電壓可以與接地 電壓同電位。在此假設第—電阻Ra、第二電阻Rb、第三 電阻Rc、第四電阻Rd的電阻值皆相同。據此，連算放大 器OP1與電阻尺^:^^^尺卜^^所組合的電路可祝為一類 比減法态，並且由運算放大器24〇所輪出第二输出電壓 201128600 HM-zuuy-u〇29-TW 31611 twf.doc/n V〇ut會等於第一輸出電壓Vdac減去一個位移電壓Δν ^ 換言之，通道緩衝器230會對第一輸出電壓的 電壓準位位移一個位移電壓Δν並輪出作為第二輸出^^壓 VOUT。第二輸出電壓乂01^被輸出以作為驅動電壓，以驅 動液晶顯示對應灰階的亮度。藉此，當不同書素（戋子食 素）的共同電壓的電鲜位不同時，可依據位移電^Λνς 整第二輸出賴¥贿的電壓準位’以讓不同晝素於相同灰 階所顯示的亮度接近甚至相同。 此外，由於伽瑪電壓的位移基準點可以參照兩晝素中 較高的共同或較低的制電壓，所以位移轉^即可 對應地為負電壓或正電壓。當位移電壓Δν為負電壓時，第 二輸出電壓vQUT會大於第—輸出電壓vDAe △V為正電壓時，第二輸_ν〇υτ會小於第—輸出電壓 Vdac。 。。在本實施例中，位移電壓W是由第二數位類比轉換 器250所提供’但在其他實施例中可以由外部電路提供， 並不限於此。舉例來說，在本發明的—實施例中，位移電 壓^為類比電麗並由顯示器的時序控制器（timing ⑶咖ller，TC〇N)動態產生，其中顯示器包括第一電阻串 歹J 210、弟一數位類比轉換器no、通道緩衝器wo。 在本實施例中，第二數位類比轉換器25〇包括第二電 阻串列252及開關SW广SWn，其中N為一正整數。第二 毛阻串列252包括多個串聯的電阻Rv—丨〜^^—n，並且第 二電阻串列252的第一端C接收第一輸入電壓〜，第 201128600 HM-2UU9-0029-TW 31611 twf.doc/n 二電阻串列252的第二端D接收第二輪入電壓△Vrefl，其 中第一輸入電壓△VrEFJ·!大於第二輸入電壓△'VRgp l。 電阻RV j〜RV_N對第一輸入電壓與第二輸入 電壓AVref l之間的電壓進行分壓，以提供多個分壓 Δλ^Δ'。開關SW广swN分別接收分壓，並依 據控制碼CB選擇分壓Δν广ΔνΝ的其中之一作為位移電壓 △V。據此，第二數位類比轉換器250會依據控制碼（：3輸 出位移電壓Δν ’其中控制碼CB的位元數可以相同於開關 SW^SWn的數目，以利用控制碼CB的各位元分別控制開 關 SWi〜SWN。 此外’圖2中所示為6位元的源極驅動器，亦即第一 電阻_列210的電阻數為26，若要變更為8位元的源極驅 動器，則增加第一電阻串列210中串聯的電阻數至256顆 (亦即2的8次方）。據此，其他位元數（例如1〇位元） 的源極驅動器則依此類推。 第二實施例 圖3為根據本發明第二實施例的源極驅動器的電路 圖。請麥照圖2及圖3，其不同之處在於通道緩衝器33〇、 電流式數位類比轉換器350及電壓轉電流轉換器36〇。通 道緩衝器330為依據一位移電流ΔΙ位移第一輸出電壓 Vdac。通道緩衝器330包括運算放大器24〇及電阻Re。電 =Re的一端耦接運算放大器24〇的負輸入端並接收位移 電流ΔΙ，電阻Re的另一端耦接運算放大器24〇的輸出端 201128600 ruvi-^uu7-u029-T\V 31611 twf.doc/n 並輸出第二輸出電塵Vqut。運算放大器，的正輸入端輕 接第一數位類比轉換器220的輸出端222以接 電壓vDAe。 $ 山依據運作放大器的電路原理，運算放大器24g的負輸 端的電位會等於其正電輸人端的電壓，亦即運算放大器 4〇 ?輸入端的電位會大致等於第-輸出電壓VDAC，並 電'ΔΙ气流經電阻Re而產生壓降，致使連算放大 $ =輸出第二輸出電壓V，會等於第—輸出電壓 ν^ΔΤ=電流^與電阻⑸的電阻值的乘積（亦即 電ΐν Hr。、1康此，當位移電流&更動時’第二輸出 電屋VOUT的電壓準位也會隨著更動。 哭35^戶例轉電流W是由電流式數位類比轉換Non-Average Shift [Invention J] The present invention provides a source driver source driver, a voltage level of a voltage. ° Displacement Drive The present invention provides a source driver that includes a first electrical first digital analog converter and a channel buffer. The first-resistor string, the series, the series-connected resistors, and the first-resistance series of the first-resistor series include: the electric-digital analog converter_the first resistor, the resistor. The first-to-digital analog converter rotates the gamma voltages supplied by the u according to the data code - as the first - the k-pulse consumes the wheel-out of the first-to-digital analog converter, to The voltage level of the channel is shifted and the second round of output voltage is output. - Output Power In the embodiment of the present invention, the above-mentioned channel buffers the voltage level displacement of the voltage - a displacement voltage. Ten brothers - lose the forest 7 - the real _ towel, the above-mentioned channel slow charm resistance, the second resistance, the third resistance and the fourth resistance; The other end of the first-resistance receives the displacement electric current, and the other end of the resistance is coupled to the operation, and the end of the resistor is coupled to receive the operation to amplify the crying. ', ten-end. The second end _ op amp's input ^. And the output of the second-digital analog-to-digital converter, the first = the first input, the other of the fourth resistor is the 201128600 mvi-zuu9-0029-TW 31611 twf.doc/n In the consistent example of the poor, the resistance values of the first-resistor, the second resistor, the second resistor, and the fourth resistor are the same. In an embodiment of the invention, the source driver further includes a analog converter that outputs a displacement voltage in accordance with a control code. ^ In the present invention - in the real complement, the second number of paving ratios described above includes a second series of resistors and a plurality of switches. The second resistor string includes: a connected resistor, and each resistor of the second resistor string is provided - corresponding to the MN. (4) The data (4) Code Lin's above-mentioned towel is used as the displacement voltage. In an embodiment of the present invention, the second :==:== voltage of the second resistor string, the second end of the second resistor string receives the second input voltage, wherein the 苐-input voltage is greater than the second Wheel people voltage. In an embodiment of the present invention, the second -> of the first-resistor string: the reference voltage, the second end of the first resistor string receives the second reference voltage, wherein the first reference voltage is greater than the second reference Voltage. In the embodiment of the present invention, the source driver bit analog conversion H, wherein the current type digital integer output - bit & electric 4 and 'channel slow _ including operational amplification resistance. operational amplifier output second Output voltage, where = electric input is coupled to the output of the first digital analog converter: β white 'positive input terminal of the operational amplifier and receiving displacement it; the frequency of the impedance is connected to the output of the operational amplifier and output second The other end of the invention is a source driver t-stream converter, wherein the electric (four) current converter will be referenced 201128600 HM-2U〇y-u029-TW 31611twf.doc/n = The current-and-current touch-to-battery switching is based on a reference current output bit resistance. In the embodiment of the present invention, the voltage-to-current converter is in the embodiment of the present invention, the above-mentioned first output voltage. The output voltage is less than First in the present invention In the embodiment, the output voltage is greater than the magnitude of the source selective displacement voltage according to the embodiment of the present invention, and the display effect of the liquid crystal is adjusted according to the level of the displacement voltage of two== ^ source driver According to the control code generation bit: the transmission output of the second output is 3:: the effect of the gate crystal age. Thereby, the similar or the same (four) common voltage level of the halogen can be shown as: The features and advantages can be more clearly understood. The following is a detailed description of the following example: (Fourth) is as follows: [Embodiment] The first embodiment is shown. ί lost 2 days = according to = day and month - implementation Example _ pole driver circuit = one: money Figure 2 'source drive _ 2 〇〇 including the first resistor string train, bit analog converter 220, channel buffer 230 and second digit class 5 〇. The string 210 includes a plurality of resistors 28 串联 in series. _ 3i — = 〜 R64, the first end a of the sub-resistor series 21 接收 receives the first reference voltage GMAH, the first resistor string U, U 〇 The second end B receives the second reference voltage GMAL, wherein the first reference voltage GMAH is greater than The second reference voltage f GMAL. The resistors ri~r64 convert the first reference voltage 〇μαη and the second reference voltage GMAL to a pure voltage, and read a partial voltage as the gamma voltages V0 V V63. The first digital analog converter 220 The first digital analog converter 220 is coupled to the first digital resistor string 21〇, and the first digital analog converter 220 outputs the gamma voltages VG to V63 according to the data code CA as the first output voltage V. = - The output voltage VDac is not the drive voltage. The channel buffer 23 is lightly connected to the output 222 of the digital-to-digital analog converter 22A. The channel buffer 230 includes the operational amplifier 240 and the resistors Ra, Rb, Rc, Rd. The first end of the resistor Ra receives the displacement voltage Δν, and the other end of the first resistor is lightly connected to the negative input terminal of the operational amplifier 240. One end of the second resistor is lightly received by the negative wheel input terminal of the differential amplifier 240, and the other end of the second resistor is coupled to the output terminal of the operational amplifier 240. The terminal end of the third resistor Rc is coupled to the wheel terminal of the first digital analog converter 220, and the other end of the third resistor Rc is coupled to the positive input terminal of the operational amplifier 240. One end of the fourth resistor Rd is coupled to the positive input terminal of the operational amplifier 240, and the other terminal of the fourth resistor Rd receives the reference voltage VREF', wherein the reference voltage can be at the same potential as the ground voltage. Here, it is assumed that the resistance values of the first resistor Ra, the second resistor Rb, the third resistor Rc, and the fourth resistor Rd are the same. Accordingly, the circuit of the combination amplifier OP1 and the resistance ruler: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 〇 29-TW 31611 twf.doc/n V〇ut will be equal to the first output voltage Vdac minus one displacement voltage Δν ^ In other words, the channel buffer 230 will shift the voltage level of the first output voltage by a displacement voltage Δν and turn The output is VOUT as the second output. The second output voltage 乂01^ is outputted as a driving voltage to drive the liquid crystal display to the brightness of the corresponding gray scale. Therefore, when the electric voltages of the common voltages of different books (scorpion foods) are different, the voltage level of the second output can be adjusted according to the displacement electric power to make the different gray levels The displayed brightness is close to or even the same. In addition, since the displacement reference point of the gamma voltage can refer to the higher common or lower voltage in the two elements, the displacement can be correspondingly a negative voltage or a positive voltage. When the displacement voltage Δν is a negative voltage, the second output voltage vQUT is greater than the first output voltage vDAe ΔV is a positive voltage, and the second output _ν 〇υτ is smaller than the first output voltage Vdac. . . In the present embodiment, the displacement voltage W is provided by the second digital analog converter 250', but may be provided by an external circuit in other embodiments, and is not limited thereto. For example, in the embodiment of the present invention, the displacement voltage ^ is analogous to the MN and is dynamically generated by the timing controller (timing (3) ller, TC 〇 N) of the display, wherein the display includes the first resistor string J 210 Brother, a digital analog converter no, channel buffer wo. In the present embodiment, the second digital analog converter 25A includes a second resistor string 252 and a switch SW wide SWn, where N is a positive integer. The second series of resistors 252 includes a plurality of resistors Rv_丨~^^-n connected in series, and the first terminal C of the second resistor string 252 receives the first input voltage~, 201128600 HM-2UU9-0029-TW 31611 twf.doc/n The second terminal D of the two resistor string 252 receives the second wheeling voltage ΔVref1, wherein the first input voltage ΔVrEFJ·! is greater than the second input voltage Δ'VRgp l. The resistors RV j RVV_N divide the voltage between the first input voltage and the second input voltage AVref l to provide a plurality of divided voltages Δλ^Δ'. The switch SW wide swN receives the divided voltages respectively, and selects one of the divided voltages Δν wide ΔνΝ as the displacement voltage ΔV according to the control code CB. Accordingly, the second digital analog converter 250 can control the code according to the control code (:3 output displacement voltage Δν ', wherein the number of bits of the control code CB can be the same as the number of switches SW^SWn, respectively, by using the bits of the control code CB. Switch SWi~SWN. In addition, the source driver of 6-bit is shown in Fig. 2, that is, the resistance of the first resistor_column 210 is 26, and if it is to be changed to the 8-bit source driver, the number is increased. The number of resistors connected in series in a resistor string 210 is 256 (that is, the 8th power of 2). Accordingly, the source driver of other bit numbers (for example, 1 unit) is deduced by analogy. 3 is a circuit diagram of a source driver according to a second embodiment of the present invention. Please refer to FIG. 2 and FIG. 3, respectively, in that a channel buffer 33A, a current digital analog converter 350, and a voltage to current converter are provided. The channel buffer 330 is configured to shift the first output voltage Vdac according to a displacement current ΔΙ. The channel buffer 330 includes an operational amplifier 24A and a resistor Re. One end of the electric=Re is coupled to the negative input terminal of the operational amplifier 24〇 and receives Displacement current ΔΙ, another resistance Re The terminal is coupled to the output terminal of the operational amplifier 24〇201128600 ruvi-^uu7-u029-T\V 31611 twf.doc/n and outputs the second output dust Vqut. The positive input of the operational amplifier is connected to the first digital analog conversion The output terminal 222 of the device 220 is connected to the voltage vDAe. The mountain is based on the circuit principle of the operating amplifier. The potential of the negative input terminal of the operational amplifier 24g is equal to the voltage of the positive input terminal, that is, the potential of the input terminal of the operational amplifier 4? Equal to the first-output voltage VDAC, and the electric 'ΔΙ gas flow generates a voltage drop through the resistor Re, causing the continuous amplification $= output second output voltage V, which is equal to the first output voltage ν^ΔΤ=current^ and the resistance of the resistor (5) The product of the value (that is, the electric ΐ ν Hr., 1 Kang, when the displacement current & change the voltage level of the second output electric house VOUT will also change with the change. Cry 35 ^ household rotation current W is the current Digital analog conversion
:二ί:Τ 數位類比轉換器350依據控制碼CB 將參考電流IREF轉換為位移 ^ 通道緩衝ϋ 330，i巾本i讀出位移電流龜 ]曰、^这戶、轭例所述。並且，在本實施例中，夂 轉換器36Q所提供，而在其;實施^ 電壓轉_==卜1卩^^供，並不以此為限。 W，其中電壓轉心懸二考電£、轉換為參考電流 h 轉”轉換器可以為一電阻。 n所边，本發明實施例的源極驅動哭’可依撼灿 碼坻擇位移電壓的大小， 了依據控制 壓的電壓準位，以調整液曰^位^電壓位移第二輸出電 液日日的喊不效果。並且，本發明實 201128600 9-0029-TW 3161 ltwf.doc/n 施例的源極驅動器可依據控制碼產生位移電流，並依 移電流位移第二輸出電壓的電壓準位，以調整液晶^ ^ 效果。藉此，透過位移第二輸出電壓，使不同共同電壓= 位的晝素能顯示出相似或相同的效果。此外，可' 緩衝器位移驅動電壓的電壓準位，以簡化電路嘹卄 度。並且’透過對應顯示器的掃描期間位移伽雜 的 =t移，#此可避免顯示器的干擾（咖崎)固 丄此外’由於透過單一運算放大器240 因此通道緩衝器230及33〇的運算放 多仍瑪電壓， 消除。 ㈣偏移現象會被 雖然本發明已以實施例揭露如上，缺复 本發明，任何所屬技術領域中具有通料^=以限定 ==範圍内’當可作些許之更動與潤飾不= 又月之保4關當視_之申請專利範圍所界定者為^本 【圖式簡單說明】 圖 圖1為—傳統源極驅動器的電路示咅g 圖2為根據本發明第—實施例的&^_的_ 圖 圖3為根據本發明第二實施儀源極驅動器 的電 【主要元件符號說明】 !〇〇、200、300 :源極驅動器 201128600 iuvi-^vv^-v029-TW 3161 ltwf.doc/n 110、120、230 :通道缓衝器 130 :數位類比轉換器 210 :第一電阻串列 220 :第一數位類比轉換器 222、A、B、C、D :端點 240 :運算放大器 250 :第二數位類比轉換器 252 :第二電阻串列 350 :電流式數位類比轉換1 ® 360 :電壓轉電流轉換器 AR1 〜AR64、R、R1 〜R64、Ra〜Re、RV_1 〜RV—N :電 AV0〜AV63、V0〜V63 :伽瑪電壓 △V :位移電壓 ΔΙ :位移電流 GMAH、GMAL、VREF :參考電壓 Iref : 夢*考電流 Vdac N V〇ut :輸出電壓 △Vref_h、AVRErjL· :輸入電壓 :分壓 CA :資料碼 CB ·控制碼 SW丨〜SWN :開關 14: 2 ί: Τ The digital analog converter 350 converts the reference current IREF into a displacement according to the control code CB. ^ Channel buffer ϋ 330, i reads the displacement current turtle, 曰, ^, the yoke example. Moreover, in the present embodiment, the 夂 converter 36Q is provided, and the voltage is turned on _== 卜1卩^^, and is not limited thereto. W, wherein the voltage is transferred to the reference voltage, and the converter is a resistor. The converter can be a resistor. The source of the embodiment of the invention is driven by crying. The size, according to the voltage level of the control voltage, to adjust the liquid 曰 ^ position ^ voltage displacement of the second output electro-hydraulic day call no effect. And, the present invention 201128600 9-0029-TW 3161 ltwf.doc / n Shi The source driver of the example can generate a displacement current according to the control code, and shift the voltage level of the second output voltage according to the shift current to adjust the liquid crystal effect, thereby shifting the second output voltage to make different common voltages = bits The morpheme can show similar or identical effects. In addition, the snubber can drive the voltage level of the voltage to simplify the circuit 。. And 'transfer the gamma through the corresponding display during the scan = t shift, # This can avoid the interference of the display (Kazaki). In addition, due to the operation of the single operational amplifier 240, the channel buffers 230 and 33〇 are still more than the voltage, and are eliminated. (4) The offset phenomenon will be The embodiment discloses the above, and the invention is absent, and any technical field in the art has a general condition of == in the range of === when a little change can be made and the decoration is not = the warranty of the month is 4 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of a conventional source driver. FIG. 2 is a diagram of a & __ according to a first embodiment of the present invention. FIG. 3 is a diagram of the present invention. The second implementation of the source driver's power [main component symbol description] !〇〇, 200, 300: source driver 201128600 iuvi-^vv^-v029-TW 3161 ltwf.doc/n 110, 120, 230: channel slow Punch 130: digital analog converter 210: first resistor string 220: first digital analog converter 222, A, B, C, D: endpoint 240: operational amplifier 250: second digital analog converter 252: Two-resistor series 350: current-type digital analog conversion 1 ® 360: voltage-to-current converters AR1 to AR64, R, R1 to R64, Ra~Re, RV_1 to RV-N: electric AV0~AV63, V0~V63: gamma mA voltage ΔV: displacement voltage ΔΙ : displacement current GMAH, GMAL, VREF: reference voltage Iref : dream * test current Vdac NV 〇ut : Output voltage △Vref_h, AVRErjL· : Input voltage : Partial pressure CA : Data code CB · Control code SW丨~SWN : Switch 14