200912861 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種顯示器，且特別是有關於一種顯 示器之源極驅動器及其方法。 【先前技術】 近年來，隨著光學科技與半導體技術的進步，液晶顯 示裝置（Liquid Crystal Dispiay ; LCD)已廣泛的應用於電子 產品上。液晶顯示器具有高晝質、體積小、重量輕、低電 壓驅動及低消耗功率等優點，故已廣泛的應用於可攜式電 腦、個人數位助理以及彩色電視機等產品中，成為顯示器 的主流。 第1圖係繪示使用於液晶顯示器之習知源極驅動器 1〇〇之示意圖。源極驅動器100至少包括通道（1〇8、ιι〇)、200912861 IX. Description of the Invention: [Technical Field] The present invention relates to a display, and more particularly to a source driver of a display and a method thereof. [Prior Art] In recent years, with the advancement of optical technology and semiconductor technology, liquid crystal display devices (Liquid Crystal Dispiay; LCD) have been widely used in electronic products. The liquid crystal display has the advantages of high quality, small size, light weight, low voltage driving and low power consumption. Therefore, it has been widely used in portable computers, personal digital assistants, and color televisions, and has become the mainstream of displays. Fig. 1 is a schematic view showing a conventional source driver used in a liquid crystal display. The source driver 100 includes at least a channel (1〇8, ιι〇),
再儲存於第二栓鎖中。 或132)、一栓鎖單元（LatchUnit)(123或133)、一位準移位 器(128或138)、以及一齡仞/翻姑，A _______ 更甚者’資料先儲存在第一栓鎖中， 貝料會再經由輸出墊114與116，傳 200912861 送至-顯示器（未綠示），以在顯示器上顯示對應之影像。 然而，當供電至源極驅動器之電源供應器要關閉時， 供應至源極驅動器之電壓會降低，因為電壓不夠，通道便 可能會誤動作，這會在顯示器上造成不正常的影像，例如 線缺陷（Line Defects)或條紋（Band Mura)。 【發明内容】 Ο ο 因此，本發明的目的就是在提供一種源極驅動器及其 雜訊抑制方法，可在電源供應器導通/關閉時，減少顯示於 顯不器上之不正常影像。 本發明的另一目的就是在提供一種源極驅動器，且有 一壓降偵測器，用以福測電源供應 盔曰日，立L "伢應态疋否正導通/關閉，若 為疋，則產生一重設訊號（Reset Signal)。 根據本發明之上述目的，提出一種在 靖時’抑制-源極驅動器輸出之雜訊之方 驅動益至少包括一資料匯流排、複數個通道 及複數個輸出塾。通道經由多 彳窃以 有-栓鎖單元，資料傳輸於資料匯=出塾，各通道具 輩元中。料" 悄/m·排上，並儲存於栓鎖 早兀中/原極驅動器可由電源供應器輪“ 壓供電。上述之方法至少包括下列步驟。首先判=電 供應電壓是否不足，若不足 先判别弟- 於資料匯流拼上之，料設為一預::=。先峨 啟’以使資料從㈣單元輸出。，拴鎖早％開 以根據上述之咨W 考維持多工器開啟， 以根據，貪料，經由輸出塾輸 根據本發明之另一目的動電壓。 種源極驅動器，可由 6 200912861 一電源供應器供電。此源極驅動器至少包括一資料匯流 排、至少二通道、一多工器、至少二輸出墊、以及一壓降 偵測器。各通道具有一栓鎖單元，資料傳輸於資料匯流排 上’並儲存於栓鎖單元中。輸出墊經由多工器耦接通道。 壓降偵測器用以偵測由電源供應器輸出之一第一供應電壓 是否不足，若不足’則產生一重設訊號。若產生此重設訊 號’則將傳輸於資料匯流排上之資料設為一預設值，開啟 栓鎖單元，以使資料從栓鎖單元輸出，並開啟多工器，以 根據資料，經由輸出墊輸出一驅動電壓。 【實施方式】 為了使本發明之敘述更加詳盡與完備，可參照下列插 述並配合第2圖至第4圖之圖示。 請參考第2圖，第2圖係繪示依照本發明較佳實施例 之源極驅動器之示意圖。第2圖中之源極驅動器2〇〇由一 電源供應器202供電，且源極驅動器200至少包括複數個 通道（通道208、通道210…）、至少一多工器（Μυχ)212、複 數個輸出墊（輸出墊214、輸出墊216...)經由多工器212耦 接通道、一電壓均分開關22〇、一壓降偵測器204與電源供 應盗202相接、以及一控制器2〇6連接至壓降偵測器2〇4。 電壓均分開關220電性連接於輸出墊214與216之間，以 在需要時，均分輸出端的電壓。電源供應器2〇2可提供高 電位之一第一供應電壓與低電位之一第二供應電壓。’、呵 曰壓降债測器204可判別電源是否正導通或關閉，若為 疋，則產生一重設訊號RS。電源導通/關閉的判定是藉由偵 200912861 測從電源供應器202輪出之第一供應電壓與第二供應電壓 之其中之一者是否不足，亦即，是否低於某些臨界值。 重没訊號RS會再送至控制器2〇6。控制器2〇6接著根 據重設訊號RS ’產生一控制訊號CN，並將此控制訊號cn 傳送至電壓均分開關220，以關閉電壓均分開關22〇。此控 制訊號CN更傳送至多工器，以斷開通道與輸出墊之連接， 因此，當供電至源極驅動器之電源供應器2〇2正要導通/關 ^ 閉時，可能會不正常的資料便不會傳送至輸出墊。故，在 f €源供應11導通/關閉時，顯示器會持續顯示原來的影像。 清參考第3圖，第3圖係緣示依照本發明較佳實施例 之另一源極驅動器之示意圖。第3圖中之源極驅動器 由一電源供應器302供電，且源極驅動器3〇〇至少包括通 道308與通道310、多工器（Μυχ) 312、輸出墊314與輸出 墊316、一資料匯流排318、一電壓均分開關32〇、一壓降 偵測器304與電源供應器3〇2相接、以及—控制器3〇6連 、 接至壓降偵測器304。輸出墊314與輸出墊316經由多工器 〇 312耦接至通道308與通道31〇。電壓均分開關32〇電性連 接於源極驅動器300之輸出墊314與輸出墊316之間，以 在需要時’均分輪出端的電壓。 各通道具有—移位暫存器（322或332)、一栓鎖單元 (323或333)、一位準移位器（328或338)、以及—數位/類比 轉換器（DAC)(330或34〇)。各择鎖單元至少包括一第—检 鎖（324或334)與—第二栓鎖（326或336)串聯。資料傳輪於 資料匯流排318上，並儲存於拾鎖單元中，更甚者，資料 先儲存在第一栓鎖中，再儲存於第二栓鎖中。 200912861 當電源供應器302正常供電至源極驅動器3〇〇時，通 道中的資料會輪入至多工器3丨2,再經由輸出墊3 14與輪出 墊316,傳送至一顯示器（未繪示於圖中），以在顯示器上顯 示對應之影像。然而，當電源供應器3〇2正要導通或關閉 時，傳送至源極驅動器300的電壓開始不足。若電源供應 器302輸出之電壓不足，則壓降偵測器3〇4會產生一重設 訊號RS，並將此重設訊號RS送至控制器3〇6，以根據重 設訊號RS，產生一控制訊號CN^此控制訊號CN會傳送 至電壓均分開關320,以關閉電壓均分開關32〇。接著，此 控制訊號CN也會傳送至資料匯流排318，以將傳輸於資料 匯流排318上之資料設為—預設值。更甚者，此控制訊號 CN也會傳送至栓鎖單元323與333 ’以維持栓鎖單元323 與333開啟，藉以使資料從拴鎖單元323與333輸出。此 控制訊號CN更會傳送至多工器312，以維持多工器312開 啟’以根據上述之資料’經由輸出塾輸出一驅動電壓。因 此’輸出1314與輪出整316會輸出預設的電壓至一顯示 器（耒繪示於圖中故，在電源供應器導通/關閉時，顯示 器會顯示對應的黑畫面或白畫面。 值得注意的是，在本發明之其他實施例中，電壓均分 開關是選擇性的。因此，在本發明之其他實施例中，當電 源供應器302正要導通或關閉時，亦即第—供應電壓不足 時，關閉電壓均分開關之步驟亦是選 ^發明之較佳實施财，維持栓鎖單元開啟之步驟係在^ 持第二拴鎖開啟。 以下將詳細說明壓降债測器的結構與重設訊號RS的 200912861 產生。 請參考第4圖，第4圖係繪示依照本發明較佳實施例 之壓降偵測器之示意圖。第4圖中之壓降偵測器3〇4至少 包括一第一分壓器402、一第二分壓器404、一第一比較器 406、一第二比較器4〇8、一第一反相器410、一第二反相 器412、一第三反相器414、一第四反相器416、一位準移 位器418、一第五反相器420以及一或閘426。或閘426至 少包括一反或閘422與一第六反相器424串聯。第一分壓 器402包括串聯的電阻ri至R7，而第二分壓器4〇4包括 串聯的電阻R11至R16。 第一分壓器402根據從電源供應器輸出之第一供應電 壓VDDA ’產生一第一分壓電壓vA1 ’而第二分壓器4〇4 根據從電源供應器輸出之第二供應電壓VDDD，產生一第 二分壓電壓vD1。第一比較器406比較第一分壓電壓Vai 與臨界電壓vTH，並產生一第一比較訊號RSA。若第一分 壓電壓vA1小於臨界電壓Vth，則第一比較訊號RSA為高 電位，表示因為電源供應器正要導通/關閉，所以電源供應 器的電壓不足。若第一分壓電壓vai大於臨界電壓，則 第一比較訊號RS A為低電位，表示電源供應器正常供電至 源極驅動器。 相似地，第二比較器408比較第二分壓電壓ν〇ι與臨 界電壓vTH ’並產生-第二比較訊號RSD。若第二分壓電 壓vD1小於臨界電壓Vth，則第二比較訊號RSD為高電位， 表不電源供應器正要導通/關閉。若第二分壓電壓V⑴大於 臨界電壓vTH，則第二比較訊號RSD為低電位，表示電源 10 200912861 供應器正常供電至源極驅動器。第一供應電壓vdda相較 於第二供應電壓VDDD，第一供應電壓VDDA為一高電 壓，第-比較器為-高電壓元件，而第二比較器為一低電 壓元件。第一分壓電壓vA1、第二分壓電壓Vm以及臨界電 壓VTH的設定與改變皆可由使用者決定。 臨界電壓VTH係由不會輕易受到電源供應器輸出電壓 降低影響之電路所產生，例如可為帶溝電壓產生器（Band_gap Voltage Generator) ° 第一比較§fl號RS A會經由第一反相器41 〇與第二反相 器412’傳送至或閘426之一輸入端。第二比較訊號rSD 會經由第三反相器414與第四反相器416,傳送至位準移位 器418，以移位第二比較訊號RSd之位準。位準已移位之 第二比較訊號RSD會再經由第五反相器420，傳送至或閘 426之另一輸入端。若第一比較訊號RSa與第二比較訊號 RSD皆為低電位，則或閘426輸出一低電位訊號，表示電 源供應器正常供電至源極驅動器，因此，重設訊號不會產 生。相反地’若第一比較訊號RSA及/或第二比較訊號RSD 為高電位，則或閘426輸出一高電位訊號，表示電源供應 器正要導通/關閉，重設訊號RS便會產生。 由上述本發明較佳實施例可知，本發明之一優點就 是，本發明可在電源供應器導通/關閉時’減少顯示於顯示 器上之不正常影像。 由上述本發明較佳實施例可知’本發明之另一優點就 是，本發明使用壓降偵測器，可偵測電源供應器是否正導 通/關閉，若為是，則產生一重設訊说。 200912861 雖然本發明已以一較佳實施例揭露如上，然其並非用 以p良定本發明’任何熟習此技藝者，在不脫離本發明之精 神和範圍内，當可作各種之更動與潤飾，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】 為讓本發明之上述和其他目的、特徵、優點與實施例 能更明顯易懂，所附圖式之詳細說明如下： 第1圖係搶示使用於液晶顯示器之習知源極驅動器之 示意圖； 第2圖係繪示依照本發明較佳實施例之源極驅動器之 示意圖； 第3圖係繪示依照本發明較佳實施例之另一源極驅動 器之示意圖；以及 第4圖係繪示依照本發明較佳實施例之壓降偵測器之 示意圖。 【主要元件符號說明】 306 :控制器 308 :通道 310 :通道 312 :多工器 314 :輸出墊 316 =輸出墊 318 :資料匯流排 1 〇〇 :源極驅動器 108 :通道 :通道 112 :多工器 114:輸出墊 116 :輸出塾 118 :資料匯流排 200912861Then stored in the second latch. Or 132), a latch unit (123 or 133), a quasi-shifter (128 or 138), and a one-year 仞/翻 ,, A _______ even more 'data first stored in the first bolt In the lock, the material will be sent to the display (not green) via the output pads 114 and 116, and the corresponding image will be displayed on the display. However, when the power supply to the source driver is turned off, the voltage supplied to the source driver is reduced. Because the voltage is insufficient, the channel may malfunction, which may cause abnormal images on the display, such as line defects ( Line Defects or Band Mura. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a source driver and a noise suppression method thereof that can reduce an abnormal image displayed on a display when the power supply is turned on/off. Another object of the present invention is to provide a source driver, and a voltage drop detector for measuring the power supply of the helmet, and to determine whether the current state is "on/off", if Then a Reset Signal is generated. In accordance with the above objects of the present invention, it is proposed that the noise benefit of the noise-receiving-source driver output at least includes a data bus, a plurality of channels, and a plurality of outputs. The channel is multi-plagiarized with a latch-lock unit, and the data is transmitted in the data sink = out, each channel has a generation. Material " quiet / m · row, and stored in the latch lock early / the original drive can be powered by the power supply wheel "voltage. The above method includes at least the following steps. First judge = whether the power supply voltage is insufficient, if not enough First discriminate the younger brother - in the data convergence, it is set to a pre-::=. First 峨 ' ' to make the data output from the (four) unit., 拴 早 早 早 早 早 早 早 早 早 早 维持 维持 维持 维持 维持 维持 维持 维持 维持 维持 维持 维持 维持According to another source voltage according to the present invention, the source driver can be powered by a power supply of 6 200912861. The source driver includes at least one data bus, at least two channels, a multiplexer, at least two output pads, and a voltage drop detector. Each channel has a latching unit, and the data is transmitted on the data busbar and stored in the latch unit. The output pads are coupled via the multiplexer. The voltage drop detector is used to detect whether the first supply voltage is insufficient by the power supply output, and if it is insufficient, a reset signal is generated. If the reset signal is generated, it is transmitted on the data bus. The material is set to a preset value, and the latch unit is turned on to output the data from the latch unit, and the multiplexer is turned on to output a driving voltage via the output pad according to the data. [Embodiment] In order to make the description of the present invention For more detailed and complete, refer to the following descriptions and the diagrams of Figures 2 to 4. Please refer to Figure 2, which is a schematic diagram of a source driver in accordance with a preferred embodiment of the present invention. The source driver 2 is powered by a power supply 202, and the source driver 200 includes at least a plurality of channels (channel 208, channel 210, ...), at least one multiplexer 212, and a plurality of outputs. The pad (output pad 214, output pad 216...) is coupled to the channel via a multiplexer 212, a voltage sharing switch 22A, a voltage drop detector 204 is coupled to the power supply pirate 202, and a controller 2 〇6 is connected to the voltage drop detector 2〇4. The voltage sharing switch 220 is electrically connected between the output pads 214 and 216 to evenly divide the voltage of the output terminal when needed. The power supply 2〇2 can provide high One of the potentials of the first supply voltage and one of the low potentials Should be voltage. ', 曰 曰 pressure drop detector 204 can determine whether the power is positive or closed, if 疋, then generate a reset signal RS. The power on / off determination is detected by the 200912861 slave power supply 202 Whether one of the first supply voltage and the second supply voltage is insufficient, that is, whether it is below a certain threshold. The re-signal RS will be sent to the controller 2〇6. The controller 2〇6 is then A control signal CN is generated according to the reset signal RS', and the control signal cn is transmitted to the voltage sharing switch 220 to turn off the voltage sharing switch 22A. The control signal CN is further transmitted to the multiplexer to disconnect the channel and The output pad is connected. Therefore, when the power supply 2〇2 supplied to the source driver is about to be turned on/off, abnormal data may not be transmitted to the output pad. Therefore, when the f € source supply 11 is turned on/off, the display will continue to display the original image. Referring to Figure 3, there is shown a schematic view of another source driver in accordance with a preferred embodiment of the present invention. The source driver in FIG. 3 is powered by a power supply 302, and the source driver 3 includes at least a channel 308 and a channel 310, a multiplexer 312, an output pad 314 and an output pad 316, and a data sink. The row 318, a voltage equalizing switch 32A, a voltage drop detector 304 are connected to the power supply 3〇2, and the controller 3〇6 is connected to the voltage drop detector 304. Output pad 314 and output pad 316 are coupled to channel 308 and channel 31 by multiplexer 312. The voltage sharing switch 32 is electrically coupled between the output pad 314 of the source driver 300 and the output pad 316 to equally divide the voltage at the output of the wheel. Each channel has a shift register (322 or 332), a latch unit (323 or 333), a one-bit shifter (328 or 338), and a digital/analog converter (DAC) (330 or 34〇). Each of the lock units includes at least a first check lock (324 or 334) and a second lock (326 or 336) in series. The data is transmitted to the data bus 318 and stored in the pick-up unit. Further, the data is first stored in the first latch and then stored in the second latch. 200912861 When the power supply 302 is normally powered to the source driver 3〇〇, the data in the channel will be transferred to the multiplexer 3丨2, and then transmitted to a display via the output pad 3 14 and the wheel pad 316 (not drawn Shown in the figure) to display the corresponding image on the display. However, when the power supply 3〇2 is about to be turned on or off, the voltage transferred to the source driver 300 starts to be insufficient. If the voltage output from the power supply 302 is insufficient, the voltage drop detector 3〇4 generates a reset signal RS, and sends the reset signal RS to the controller 3〇6 to generate a signal according to the reset signal RS. The control signal CN^ is transmitted to the voltage sharing switch 320 to turn off the voltage sharing switch 32A. Then, the control signal CN is also transmitted to the data bus 318 to set the data transmitted on the data bus 318 to a preset value. Moreover, the control signal CN is also transmitted to the latch units 323 and 333' to keep the latch units 323 and 333 open, whereby the data is output from the latch units 323 and 333. The control signal CN is further transmitted to the multiplexer 312 to keep the multiplexer 312 turned "on" to output a driving voltage via the output port according to the above-mentioned data. Therefore, the output 1314 and the round out 316 will output a preset voltage to a display (as shown in the figure, when the power supply is turned on/off, the display will display the corresponding black or white picture. Yes, in other embodiments of the present invention, the voltage sharing switch is selective. Therefore, in other embodiments of the present invention, when the power supply 302 is about to be turned on or off, that is, the first supply voltage is insufficient. When the step of turning off the voltage sharing switch is also the preferred implementation of the invention, the step of maintaining the latch unit is turned on by holding the second shackle. The structure and weight of the pressure drop detector are described in detail below. The signal is generated in 200912861. Please refer to FIG. 4, which is a schematic diagram of a voltage drop detector according to a preferred embodiment of the present invention. The voltage drop detector 3〇4 in FIG. 4 includes at least a first voltage divider 402, a second voltage divider 404, a first comparator 406, a second comparator 4〇8, a first inverter 410, a second inverter 412, and a first a three-inverter 414, a fourth inverter 416, a one-bit shifter 418, a fifth inverter 420 and an OR gate 426. The gate 426 includes at least one inverse 422 in series with a sixth inverter 424. The first voltage divider 402 includes resistors ri to R7 connected in series, and The second voltage divider 4〇4 includes resistors R11 to R16 connected in series. The first voltage divider 402 generates a first divided voltage vA1′ according to the first supply voltage VDDA′ output from the power supply, and the second voltage divider 4〇4 generates a second divided voltage vD1 according to the second supply voltage VDDD output from the power supply. The first comparator 406 compares the first divided voltage Vai with the threshold voltage vTH, and generates a first comparison signal RSA. If the first divided voltage vA1 is less than the threshold voltage Vth, the first comparison signal RSA is high, indicating that the power supply is insufficient due to the power supply being turned on/off. If the first divided voltage vAI is greater than The threshold voltage, the first comparison signal RS A is low, indicating that the power supply is normally powered to the source driver. Similarly, the second comparator 408 compares the second divided voltage ν〇ι with the threshold voltage vTH 'and generates - Second comparison signal RSD. If If the second divided voltage vD1 is lower than the threshold voltage Vth, the second comparison signal RSD is high, indicating that the power supply is about to be turned on/off. If the second divided voltage V(1) is greater than the threshold voltage vTH, the second comparison signal RSD is Low potential means that the power supply 10 200912861 is normally supplied to the source driver. The first supply voltage vdda is higher than the second supply voltage VDDD, the first supply voltage VDDA is a high voltage, and the first comparator is a high voltage component. The second comparator is a low voltage component, and the setting and changing of the first divided voltage vA1, the second divided voltage Vm, and the threshold voltage VTH can be determined by the user. The threshold voltage VTH is generated by a circuit that is not easily affected by the output voltage drop of the power supply. For example, it can be a Band_gap Voltage Generator. The first comparison §fl RS A will pass through the first inverter. 41 〇 and second inverter 412' are transmitted to one of the inputs of OR gate 426. The second comparison signal rSD is transmitted to the level shifter 418 via the third inverter 414 and the fourth inverter 416 to shift the level of the second comparison signal RSd. The second comparison signal RSD whose level has been shifted is again transmitted to the other input of the OR gate 426 via the fifth inverter 420. If the first comparison signal RSa and the second comparison signal RSD are both low, the OR gate 426 outputs a low potential signal, indicating that the power supply is normally supplied to the source driver, and therefore, the reset signal is not generated. Conversely, if the first comparison signal RSA and/or the second comparison signal RSD are high, the gate 426 outputs a high potential signal indicating that the power supply is about to be turned on/off, and the reset signal RS is generated. In view of the above-described preferred embodiments of the present invention, it is an advantage of the present invention that the present invention can reduce an abnormal image displayed on the display when the power supply is turned on/off. According to the preferred embodiment of the present invention described above, another advantage of the present invention is that the present invention uses a voltage drop detector to detect whether the power supply is being turned on/off. If so, a reset command is generated. Although the present invention has been described above in terms of a preferred embodiment, it is not intended to be a part of the invention, and various modifications and changes can be made without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS In order to make the above and other objects, features, advantages and embodiments of the present invention more obvious, the detailed description of the drawings is as follows: FIG. 1 is a conventional source for use in liquid crystal displays. 2 is a schematic diagram of a source driver in accordance with a preferred embodiment of the present invention; FIG. 3 is a schematic diagram showing another source driver in accordance with a preferred embodiment of the present invention; and FIG. A schematic diagram of a voltage drop detector in accordance with a preferred embodiment of the present invention is shown. [Main component symbol description] 306: Controller 308: Channel 310: Channel 312: Multiplexer 314: Output pad 316 = Output pad 318: Data bus 1 〇〇: Source driver 108: Channel: Channel 112: Multiplex 114: output pad 116: output 塾 118: data bus 200912861
120 :電壓均分開關 320 ： 122 :移位暫存器 322 : 123 ··栓鎖單元 3 23 ： 124 :第一栓鎖 324 ： 126 :第二栓鎖 326 ： 128 :位準移位器 328 ： 130 :數位/類比轉換器 330 ： 132 :移位暫存器 332 ： 133 :栓鎖單元 333 ： 134 :第一栓鎖 334 ： 136 ··第二栓鎖 336 ： 138 :位準移位器 338 ： 140 :數位/類比轉換器 340 ： 200 :源極驅動器 402 ： 202 :電源供應器 404 : 204 :壓降偵測器 406 : 206 :控制器 408 ： 208 :通道 410 ： 210 :通道 412 ： 212 :多工器 414 : 214 :輸出墊 416 216 :輸出墊 418 220 :電壓均分開關 420 300 :源極驅動器 422 302 :電源供應器 424 電壓均分開關 移位暫存器 栓鎖單元 第一栓鎖 第二栓鎖 位準移位器 數位/類比轉換器 移位暫存器 栓鎖單元 第一栓鎖 第二栓鎖 位準移位器 數位/類比轉換器 第一分壓器 第二分壓器 :第一比較器 :第二比較器 :第一反相器 :第二反相器 :第三反相器 :第四反相器 :位準移位器 :第五反相器 :反或閘 :第六反相器 13 200912861 426 :或閘 304 :壓降偵測器120: voltage sharing switch 320: 122: shift register 322: 123 · latching unit 3 23: 124: first latch 324: 126: second latch 326: 128: level shifter 328 : 130 : digital / analog converter 330 : 132 : shift register 332 : 133 : latch unit 333 : 134 : first latch 334 : 136 · · second latch 336 : 138 : level shifter 338: 140: digital/analog converter 340: 200: source driver 402: 202: power supply 404: 204: voltage drop detector 406: 206: controller 408: 208: channel 410: 210: channel 412: 212: multiplexer 414: 214: output pad 416 216: output pad 418 220: voltage sharing switch 420 300: source driver 422 302: power supply 424 voltage sharing switch shift register latch unit first Latch second latch level shifter digit/analog converter shift register latch unit first latch second latch lock level shifter digit/analog converter first voltage divider second Voltage regulator: first comparator: second comparator: first inverter: second inverter: first Inverter: fourth inverter: level shifter: a fifth inverter: NOR: sixth inverter 13200912861426: OR gate 304: drop detector
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