201001382 九、發明說明： 【發明所屬之技術領域】 特別是有 且 本發明是有關於一種源極驅動器之裝置 關於一種源極驅動器之雜訊抑制。 【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 不裝置（Liquid Crystal DiSplay ; LCD)已廣泛的應用於電^ 產品上。液晶顯示器具有高畫質、體積小、重量輕： 壓驅動及低消耗功率等優點，故已廣泛的應用於可攜式 腦、個人數位助理以及彩色電視機等產品中，成為; 的主流。 | - 請參閱第1圖，其係繪示傳統源極驅動器之示意圖。 源極驅動器100包括通道⑽、多工器（Μυχ川2、^出々山 m以及資料匯流排118。通道⑽經由多工器i心接： 輸出端m。通道108具有移位暫存$ 122、检鎖單元如灿201001382 IX. INSTRUCTIONS: [Technical Fields of the Invention] In particular, the present invention relates to a device for a source driver for noise suppression of a source driver. [Prior Art] In recent years, with the advancement of optical technology and semiconductor technology, Liquid Crystal DiSplay (LCD) has been widely used in electric products. The liquid crystal display has high image quality, small size, light weight: pressure drive and low power consumption, so it has been widely used in portable brains, personal digital assistants and color TV sets. | - Please refer to Figure 1, which shows a schematic diagram of a conventional source driver. The source driver 100 includes a channel (10), a multiplexer (Μυχ川2, ^出々山m, and a data busbar 118. The channel (10) is connected via a multiplexer i: an output terminal m. The channel 108 has a shift temporary storage of $122 Check lock unit
Unit) 133、位準移位 π a 秒仪益128，以及數位/類比轉換哭 (DAC)130。检鎖單元133包括串聯之第-栓鎖m盘第二 栓鎖126。資料於資料匯流排118上㈣，並儲存於检鎖單 M33中。更具體地說’資料可先儲存在第一栓請中， 再儲存於第二栓鎖126巾’然後再經由輸出端ιΐ4傳送至 顯不$'(未繪不)’以在顯示器上顯示對應之影像。 然而，當源極驅動器1〇〇要關閉時’供應至源極驅動 為1〇0之電源電壓會發生變化，連帶使得源極驅動器⑽ 201001382 提供不正常的電壓給顯示器，造成顯示器上出現不正常的 影像’例如線缺陷（Line Defects)或條紋（Band Mura)。 因此需要一種新的源極驅動器，能夠在源極驅動器關 閉時，使顯示器正常顯像。 因此本發明之一方面提供一種源極驅動器 極驅動器關閉時，使顯示器能夠正常顯像。 依照本發明之—實施例，源極驅動器係由 益供電，此源極驅動器包括至少二通道、至少 21 ,]> 办一— 能夠在源 電源供應 輸出端、 ，少—多工器、至少-電荷均分開關以及-塵降：測： ::器：性連接通道以及輸出端，以控制通道與輸出 連接。電何均分開關電性連接輪出端 雷泝徂庵吳认, , 土 ▼1貝，則益偵測由 電源（、應續出之-第—供應㈣是否不足 由Unit) 133, level shift π a seconds benefit 128, and digital/analog conversion cry (DAC) 130. The lock-up unit 133 includes a first-lock-lock m-disk second latch 126 in series. The data is stored on the data bus 118 (4) and stored in the checklist M33. More specifically, the data can be stored in the first plug, then stored in the second latch 126, and then transmitted to the display via the output ι 4 to display the corresponding display on the display. Image. However, when the source driver 1 is turned off, the power supply voltage supplied to the source driver is 1〇0, which causes the source driver (10) 201001382 to provide an abnormal voltage to the display, causing abnormality on the display. Imagery such as Line Defects or Band Mura. There is therefore a need for a new source driver that allows the display to be properly imaged when the source driver is turned off. Accordingly, one aspect of the present invention provides a display for enabling normal display of a display when the source driver is turned off. According to an embodiment of the invention, the source driver is powered by a source, the source driver comprising at least two channels, at least 21,] a device capable of being at the source power supply output, less-multiplexer, at least - Charge equalization switch and - Dust drop: Test: :: Device: Sex connection channel and output terminal to control channel and output connection. Electrical distribution of the average electrical connection of the wheel to the end of the lightning trace, Wu, recognized, soil ▼1 shell, then the detection of the power supply (, should be continued - the first - supply (four) is not enough
導通電荷均分聞關，廿茲士夕 右不足，貝丨J 接。並精由多工器斷開通道與輪出端之連 本發明之另-方面提供—種_種源極 i 制方法，能夠消除顯示器在 _ 雜況抑 機雜訊。 〜關閉時所產生的關 依照本發明之另—實施例， 源供庫哭.丕'# ^ 孔抑制方法係判別一雷 能…否進入關閉狀態，當電源供摩 ⑺電 ;上則使：電源供應器供電之1極驅動; 而上的電荷重新分佈。 複數個輸出 上述實施例之源極驅動器以及 1利万法，能夠消 201001382 :源™閉時所產生的影傈雜訊，使顯示器正常顯 【實施方式】 以下實施例之源極驅動哭 除源極驅動器關閉時所產生的影像雜:抑：方法’能夠消 正常顯像。 ”訊，減低顯示器的不 Γ 請參照第2A圖，其係繪示本 無> 之干音R x月只施例源極驅動器 广圖。源極，驅動器扇由電源供應器2 源供應器202可提供高電位之一 此電 ^ Λ φ ^ 弟供應電壓與低電位之 口口第-供應電昼。源極驅動器2〇〇包括多個通道細、多工 益（MUX)212，以及多個輸出端 鞠出缒214。多工器212電性連接 通道208以及輸出端21 ^生連接 之連接。 ㈤4以控制通道208與輸出端214 屋降痛測器204電性連接電源供應器2〇2以及控 鳩’此|降倘測器2〇4谓測第—供應電愿與第二供:電壓 之數值以判斷電源供應器2〇2以及源極驅動器2〇〇 :狀能 是否正開始導通或正開始關閉’並根據此狀態摘測結果產 生重設訊號RS來操作控制器襄。具體地言兒，麈降偵測器 2〇4會偵測電源供應器2G2所輸出之第―供應電麼與第2 供應電壓之數值是否低於臨界值，若第—供應電麼或第二 供應電壓低於臨界值，代表源極驅動器2〇〇正處於關閉狀 恶’此％壓降彳貞測器204會產生重設訊號。 控制器206會根據重設訊號RS，產生一控制訊號cn， 201001382 並將此控制訊號C N傳送至電荷均分開關2 2 g，以 均分開關22G。由於電荷均分„ 22Q電性連接於 : 端214之間，因此當控制器2〇導 、’ λ珣 b 2Q6 5"通電何均分開關220時， =輸出端川會電性連接在—起’使得顯示器上對庫 的各貢料線的電荷重新分佈為一平均值。 〜 由於顯不器係接收輪出端川所傳遞之電壓，若 輸出立而2 14所連接之顯示器資料線之電壓能夠—致，顯示The conduction charge is evenly distributed, and the 廿 士 夕 夕 不足 不足 , , , , , , , ,. The multiplexer disconnects the channel from the wheel-out terminal. Another aspect of the invention provides a method for source-source i, which can eliminate the display in the _ miscellaneous noise. - According to another embodiment of the present invention, the source is provided by the library crying. 丕 '# ^ hole suppression method is to determine a lightning energy ... whether to enter the off state, when the power supply is supplied (7); The power supply is powered by a pole drive; and the charge is redistributed. The plurality of source drivers and the 1 mega-method of the above embodiment can eliminate the impact noise generated by the source TM when the source TM is closed, so that the display is normally displayed. [Embodiment] The source drive crying source of the following embodiment The image generated when the pole driver is turned off is: The method 'can cancel normal image. "Information, reduce the display of the monitor. Please refer to Figure 2A, which shows the dry sound of R &x; only the source drive of the application. Source, drive fan by the power supply 2 source supply 202 can provide one of the high potentials of this power ^ Λ φ ^ brother supply voltage and low potential mouth - supply power. Source driver 2 〇〇 includes multiple channels of fine, multi-working (MUX) 212, and more The output terminal 鞠 214. The multiplexer 212 is electrically connected to the channel 208 and the output terminal 21 is connected to the connection. (5) 4 is electrically connected to the power supply device 2 by the control channel 208 and the output terminal 214. 2 and control 此 'this | drop detector 2 〇 4 pre-measurement - supply power and second supply: the value of the voltage to determine the power supply 2 〇 2 and the source driver 2 〇〇: whether the shape is starting Turning on or starting to turn off' and generating a reset signal RS according to the result of the state extraction to operate the controller. Specifically, the down detector 2〇4 detects the first supply of the power supply 2G2. Is the value of the electric supply and the second supply voltage lower than the critical value, if the first supply or the first The second supply voltage is lower than the critical value, which means that the source driver 2 is in a closed state. The % voltage drop detector 204 generates a reset signal. The controller 206 generates a control signal according to the reset signal RS. Cn, 201001382 and transfer this control signal CN to the charge sharing switch 2 2 g to evenly divide the switch 22G. Since the charge is evenly divided, the 22Q is electrically connected between: the end 214, so when the controller 2 leads, ' λ珣b 2Q6 5" When the power is applied to the switch 220, the output terminal is electrically connected to the 'offset' so that the charge on the display of the tributary lines of the library is redistributed to an average value. ~ Since the display device receives the voltage transmitted by the wheel, the voltage of the display data line connected to the terminal can be displayed.
器上各顯示區塊的電壓也能趨於―致，@此可避免顯= 所顯示的影像產生雜訊，此時，顯示器的閘極驅動器係啟 動所有的掃料’使得所有像素的f壓—致。此外，更可 將控制器206所產生的控制訊號CN傳送至多工器，以 在源極驅動器細關閉時斷開通道2〇8與輸出端之： 接。。因此當源極驅動器關閉時…方止電壓不正常的資料 仏號傳送至輸出端，進—步避免顯示器上出現影像雜訊。 」青參照第2B圖，其係繪示本發明另一實施例之源極驅 動益不思圖。源極驅動器2〇〇由電源供應器2〇2供電，此 電源:應器202可提供高電位之一第—供應電壓與低電位 之—第二供應電壓。源極驅動器200包括多個通道2〇8、多 工器（MUX)212,以及多個輸出端214。多工器212電性連 接通道208以及輸出端2丨4，以控制通道2〇8與輸出端u 4 之連接。 在此一實施例當中，壓降偵測器204、控制器2〇6、通 C 208、夕工斋（Μυχ)212，以及輸出端214的功能以及結 構均與第2A圖相同，但此一實施例的電荷均分開關22〇 8 201001382 更透過電壓開關222連接至— A m U疋電壓為，例如接地端 224。备源極驅動器2〇〇關閉時 ^ j 丁才工制益2〇6會根據重設訊 號生控制訊號CN，並將此e 分開關220，以導通雷荇妁八„ μ 疋主％何均 ιι 222 Μ μ 關22G’並同時導通電麼開 關 將一輸出端214連接至接地端224。由於電荷均分 «220電性連接於輸出端214卩及接地端以’因此當控 制器206導通電荷土今合μ關± 电订々刀開關220時，所有的輸出端2Μ合 ΟThe voltage of each display block on the device can also tend to be "@", which avoids the display of noise in the displayed image. At this time, the gate driver of the display activates all the sweeps to make the f-pressure of all the pixels. Zhizhi. In addition, the control signal CN generated by the controller 206 can be transmitted to the multiplexer to disconnect the channel 2〇8 and the output terminal when the source driver is finely turned off. . Therefore, when the source driver is turned off, the data is not normal. The nickname is transmitted to the output terminal to prevent image noise from appearing on the display. Referring to Figure 2B, there is shown a source drive for another embodiment of the present invention. The source driver 2 is powered by a power supply 2〇2, which can provide one of the high potential first supply voltage and the low potential second supply voltage. The source driver 200 includes a plurality of channels 2〇8, a multiplexer (MUX) 212, and a plurality of outputs 214. The multiplexer 212 is electrically coupled to the channel 208 and the output terminal 2丨4 to control the connection of the channel 2〇8 to the output terminal u 4 . In this embodiment, the functions and structures of the voltage drop detector 204, the controller 2〇6, the pass C 208, the Xigongzhai 212, and the output end 214 are the same as those in FIG. 2A, but this one The charge sharing switch 22〇8 201001382 of the embodiment is further connected to the voltage through the voltage switch 222 to -A m U 疋 voltage, for example, the ground terminal 224. When the backup source driver 2 is turned off, ^j will only work to control the signal CN according to the reset signal, and the e-switch 220 will be turned on to turn on the thunder „ „ μ 疋ι μ 222 Μ μ OFF 22G' and simultaneously energize the switch to connect an output 214 to ground 224. Since the charge equalization «220 is electrically connected to the output 214 接地 and the ground terminal ' so the controller 206 conducts the charge When the earth is closed, the electric switch is 220, all the outputs 2 are combined.
L 電性連接在—起並接地，使得顯示器上對應的各資料線的 電位為接地電位。如此當源極驅動器扇關閉時，可使顯 示器上各顯示區塊的電壓趨於一致，避免顯示器所顯示的 影像產生雜訊。 σσ ::、第2C圖’其係緣示本發明又—實施例之源極驅 一 Γ八〜圖此貫施例源極驅動器的功能以及結構均與 =2Β®相同’但此_實施例的電荷均分開關咖更透過電 壓開關222連接至-固定電壓端，例如共用電壓端Vc。當 源極驅動器關閉時’電荷均分開關22Q導通，電壓開關如 亦同A通以將一輸出端214連接至共用電壓端％如此一 來所有輪出女而214電性連接在一起並接至共用電壓端 “使得"、員示益上對應的各資料線的電位等於共用電壓的 電位°如此當源極驅動器、200關閉時，可使顯示器上各顯 丁區塊的電壓趨於一致’避免顯示器所顯示的影像產生雜 訊。 。明:…、第3圖，其係繪示本發明再一實施例之源極驅 動器不心圖。在此—實施例當中，電源供應器搬提供源 201001382 極驅動态300電源。源極驅動 ίΜΤΤΎ) ± 耶益川〇包括通道308、多工哭 _x) 312、輸出端314、資 - 320、壓降偵.、則哭⑽、、a拼3以、電荷均分開關 兮1貝’_MJ 3 04以及j：允在丨f突、q λ广 雷源供庙”, 及匕制益3〇6。壓降偵測器3〇4與 電源供應态3 02相接，^击丨哭 .Λ4 ^ , 工制克306則連接至壓降貞 3〇4。輸出端314經由多工 貝、J。口 — ， 耦接至通道3 08。 二第產 源極驅動器近似’控制器306會根據重設 :: RS產生控制訊號⑶，並將此控制訊 何均分開關320，以導诵啻<王电 , 何句为開關320。由於電荷均分 開關320電性連接於輸出 道、A 心314之間，因此當控制器306 k H刀開關320時’所有的輸出端3 14會電性連接 使得顯示器上對應的各資料線的電荷重新分佈為 干均值。 由於顯示器係接收輸出端314所傳遞之電壓，若是各 ^出端314所連接之顯示器資料線之電壓能夠-致，顯示 Θ上各顯示區塊的電壓也能趨於—致，因此可避免顯示器 所’4不的衫像產生雜訊，此時，冑示器的閘極 動所有的料線，使得财像錢„ —致。此外。，^ 將控制器306所產生的控制訊號⑶傳送至多工器扣，以 在源極驅動器綱關閉時斷開通道鹰與輸出端。3 i 4之連 接。因此當源極驅動器關閉時，可防止電壓不正常的資料 信號傳送至輸出端314,進—步避免顯示器上出現影像雜 通道308具有移位暫存器322、栓鎖單元333、位準移 位态328、以及數位/類比轉換器（DAC)33〇。栓鎖單元 10 201001382 二括串聯之第—检鎖324與第二栓鎖326，此栓鎖單元333 :儲存貝料匯流排318戶斤傳遞的資料。具體地甚說，資 料可^儲存在第—栓鎖324中，再儲存於第二栓鎖326中。 、田電源供應器302正常供電至源極驅動器時，通 道3〇8中的資料會傳遞至多工器312,再經由多工器312 以及輸出端3U傳送至顯示器（切示於圖中），以在顯示器 上，’’、員不對應之影像。然而，當源極驅動器3〇〇正要關閉時， 傳达至源極驅動器3〇〇的電壓開始不足。若電壓不足，壓 夺偵測器304會產生—重設訊號RS以重設控制器3〇6。 允控制器306會根據重設訊號RS產生控制訊號CN。此 ^制訊號CN會傳送至電荷均分開關32〇，以導通/關閉電 何均分開關320。控制訊號CN可更傳送至多工器312，使 夕工器3 12的輪入輸出埠呈現高阻抗狀態，以斷開通道 與輸出端314之連接。因此在電源供應器3〇2以及源極驅 動扣30G關閉k，輸出^ 3 i 4上不穩定的電壓不會傳遞至 ，.”貝示器，可避免顯示器所顯示之影像產生雜訊。 "月參,¾第4圖，其係繪示本發明一實施例之壓降偵測 器示意圖。壓降偵測器3〇4包括第一分壓器4〇2、第二分壓 器4〇4、第一比較器4〇6、第二比較器408、第一反相器410、 第二反相器412、第三反相器414、第四反相器416、位準 移位器418、第五反相n 42〇以及或間似。賴似包括 串聯之反或閘422以及第六反相器424。 第一分壓益· 402包括串聯的電阻R1至R7。第一分壓 益402根據電源供應器輸出之第一供應電壓vdda，產生 201001382 第一分壓電壓VA1。第— VA1 匕杈益406會比較第一分壓電壓 VA1與臨界電壓VTH， 八懕雷戊νΛι 卫屋生第一比較訊號USA。若第一 刀壓電屋VA1小於臨界雷屦L is electrically connected and grounded so that the potential of each corresponding data line on the display is the ground potential. When the source driver fan is turned off, the voltages of the display blocks on the display tend to be consistent to avoid noise generated by the image displayed on the display. Σσ::, 2C, 'the lining shows the source of the invention--the source of the embodiment is the same. The function and structure of the source driver are the same as the =2Β®. The charge sharing switch is further connected to the fixed voltage terminal through the voltage switch 222, for example, the common voltage terminal Vc. When the source driver is turned off, the charge sharing switch 22Q is turned on, and the voltage switch is also connected to the A to connect an output terminal 214 to the common voltage terminal. Thus, all the turns are connected and the 214 is electrically connected and connected. The common voltage terminal "makes the potential of each data line corresponding to the user's benefit equal to the potential of the common voltage. Thus when the source driver, 200 is turned off, the voltage of each display block on the display tends to be uniform." The image displayed by the display is prevented from generating noise. The following is a schematic diagram of the source driver in accordance with still another embodiment of the present invention. In this embodiment, the power supply is provided with a source. 201001382 Extremely driven state 300 power supply. Source drive ΜΤΤΎ ΜΤΤΎ ± ± 耶 耶 耶 308 308 308 308 308 308 308 308 308 308 308 308 308 308 308 308 308 308 308 308 输出 输出 输出 输出 输出 312 312 312 312 312 312 312 312 312 312 312 312 312 312 312 312 312 312 312 , charge sharing switch 兮 1 ' '_MJ 3 04 and j: allow 丨 f sudden, q λ Guang Lei source for the temple, and 匕 益 benefits 3 〇 6. The voltage drop detector 3〇4 is connected to the power supply state 3 02, ^ 丨 丨 Λ ^ ^ ^ ^ ^ , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Output 314 is via multiple work, J. Port — , coupled to channel 3 08. The second source driver approximation' controller 306 generates a control signal (3) according to the reset :: RS, and divides the control signal into a switch 320 to guide the <Wang, which is the switch 320. Since the charge sharing switch 320 is electrically connected between the output track and the A core 314, when the controller 306 k H switch 320, all the output terminals 3 14 are electrically connected so that the corresponding data lines on the display are The charge redistribution is the dry mean. Since the display receives the voltage transmitted from the output terminal 314, if the voltage of the display data line connected to each of the output terminals 314 can be made, the voltage of each display block on the display can also be oscillated, thereby avoiding the display. The '4's shirt image produces noise. At this time, the gate of the display moves all the lines, making the money like money. In addition, ^ transmits the control signal (3) generated by the controller 306 at most. The device buckle is used to disconnect the channel eagle and the output terminal when the source driver is turned off. Therefore, when the source driver is turned off, the data signal with abnormal voltage can be prevented from being transmitted to the output terminal 314, Step avoiding the occurrence of the image miscellaneous channel 308 on the display has a shift register 322, a latch unit 333, a level shift state 328, and a digital/analog converter (DAC) 33. The latch unit 10 201001382 includes a series connection The first lock 324 and the second latch 326, the latch unit 333: stores the data transmitted by the billiard bus 318. Specifically, the data can be stored in the first latch 324 and then stored in The second latch 326 is in. When the device 302 is normally powered to the source driver, the data in the channel 3〇8 is transferred to the multiplexer 312, and then transmitted to the display (shown in the figure) via the multiplexer 312 and the output terminal 3U, on the display, '', does not correspond to the image. However, when the source driver 3 is about to turn off, the voltage transmitted to the source driver 3〇〇 begins to be insufficient. If the voltage is insufficient, the pressure detector 304 will generate - The signal RS is reset to reset the controller 3〇6. The controller 306 generates a control signal CN according to the reset signal RS. The signal CN is transmitted to the charge sharing switch 32〇 to turn on/off the power. The switch signal 320 can be further transmitted to the multiplexer 312 to cause the wheel-in output 埠 of the edifice 3 12 to assume a high-impedance state to disconnect the channel from the output terminal 314. Therefore, the power supply 3 〇 2 And the source drive button 30G is turned off, and the unstable voltage on the output ^ 3 i 4 is not transmitted to the "beauty display" to avoid noise generated by the image displayed on the display. "月参,3⁄4 4, which is a schematic diagram of a voltage drop detector according to an embodiment of the present invention. The voltage drop detector 3〇4 includes a first voltage divider 4〇2, a second voltage divider 4〇4, a first comparator 4〇6, a second comparator 408, a first inverter 410, and a second Inverter 412, third inverter 414, fourth inverter 416, level shifter 418, fifth inversion n 42 〇, and or like. It does include a reverse OR gate 422 and a sixth inverter 424 in series. The first partial pressure benefit 402 includes resistors R1 to R7 connected in series. The first divided voltage 402 generates a first divided voltage VA1 of 201001382 according to the first supply voltage vdda output from the power supply. The first - VA1 匕杈 406 will compare the first partial voltage VA1 with the threshold voltage VTH, and the eight comparison 戊 戊 Λ 卫 生 生 生 第一 第一. If the first knife piezoelectric house VA1 is smaller than the critical thunder
^ , VTH ’則第一比較訊號RS A 為阿電位’代表電源供應哭 m ^ ^ a 、電5"不足，也就是說電源供 應為U及源極驅動器正要關 —# Ί ]，反之，右弟一分壓電壓VAI 大於Es界電壓VTH，則第一 比权訊號RSA為低電位，表示 電源供應器正常供電至源極驅動器。^ , VTH 'The first comparison signal RS A is A potential 'representing power supply crying m ^ ^ a, electricity 5 " insufficient, that is, the power supply is U and the source driver is about to close - # Ί ], otherwise, When the voltage divider VAI of the right brother is greater than the voltage VTH of the Es boundary, the first ratio signal RSA is low, indicating that the power supply is normally supplied to the source driver.
相似地’第二分麼器404包括串聯的電阻心至心。 弟二分壓II 404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彻。第二比較器彻比較 第二分壓電壓VD1與臨界電壓VTH，並產生第二比較訊號 娜，位準移㈣418_位第二比較喊RSD之位準。 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’表示源極驅動器正要關閉。若第二分壓電 壓VD1大於臨界„ VTH，貝❻二比較訊號RSD為低電 位，表示電源供應器正常供電至源極驅動器。 在此-實施例當中，第-供應電墨之電壓值大於 第二供應電壓VODD之電壓值，第一比較器與第二比較器分 別為一高電壓元件與一低電壓元件。第一分壓電壓VA1、 第二分壓電壓VD1以及臨界電壓VTH的設定可由使用者 決定，其中臨界電壓VTH必須穩定而不會輕易受到電源供 應器輸出電壓之影響，因此可採用如帶溝電壓產生器 (Band-gap Voltage Generator)來產生臨界電壓 vTH。 第一反相器410與第二反相器412傳遞第一比較訊號 12 201001382 RSA至或閘426之一輸入端。第三反相器414、第四反相 器416、位準移位器418與第五反相器42〇則傳遞第二比較 訊號RSD至或閘426之另一輸入端，其中位準移位器418 用來移位第二比較訊號RSD。 若第一比較訊號RS A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，因此不會產生重設訊號。相反地，若 Ο 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-高電位訊號，表示電源供應器正要關閉， 便會產生重設訊號RS。 ,根據上述貝施例’為了改善顯示器之關機雜訊，可先 判別電源供應器以及源極驅動器是否進入關閉狀態；當電 源供應器以及源極驅動器進入關閉狀態，則使源極驅動器 輸出端上的電荷重新分佈，並斷開源極驅動器輸出端與通 道之連接，如此可避免顯示器產生影像雜訊。 j 、_本發明已以-較佳實施例揭露如上，㈣並非用 =疋本發明，任何在本發明所屬技術領域中具有通常知 :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，因此本發明之俘嚐r ^ ^ 个兔β之保遵乾圍當視後附之申請專利範 圍所界定者為準。 【圖式簡單說明】 特徵、優點舆實施例 如下： 為讓本發明之上述和其他目的、 更明顯易懂，所附圖式之詳細說明 13 201001382 第1圖係繪示傳統源極驅動器之示意圖。 第2A圖係繪示本發明- 一實施例之源極驅動器示意圖。 第2B圖係繪示本發明 另一實 施例之源極驅動器示意 圖。 第2C圖係繪示本發明 又一實 施例之源極驅動器示意 圖。 第3圖係繪示本發明再 一實施例之源極驅動器示意圖。 第4圖係繪示本發明一 實施例 之壓降偵測器示意圖。 【主 要元件符號說明】 100 :源極驅動器 312 : 多工器 108 :通道 314 ： 輸出端 112 :多工器 318 ： 資料匯流排 114 :輸出端 320 ： 電荷均分開關 118 •貢料匯流排 3 22 ： 移位暫存器 122 :移位暫存器 324 ： 第一栓鎖 124 :第一栓鎖 3 26 ： 第二栓鎖 126 :第二栓鎖 328 ： 位準移位器 128 :位準移位器 3 30 : 數位/類比轉換器 130 :數位/類比轉換器 333 ： 栓鎖單元 133 :栓鎖單元 402 ： 第一分壓器 200 :源極驅動器 404 ： 第二分壓器 202 :電源供應器 406 ： 第一比較器 204 :壓降偵測器 408 ： 第二比較器 14 201001382 206 ： 控制器 410 ： 第一反相器 208 ： 通道 412 ： 第二反相器 212 ： 多工器 414 ： 第三反相器 214 ： 輸出端 416 ： 第四反相器 220 : 電荷均分開關 418 ： 位準移位器 222 ： 電壓開關 420 ： 第五反相器 224 ： 接地端 422 ： 反或閘 300 ： :源極驅動器 424 ： 第六反相器 302 ： :電源供應器 426 ： 或閘 304 ： :壓降偵測器 306 :控制器 308 :通道 15Similarly, the second divider 404 includes a series of resistance centers to the center. The second divided voltage II 404 generates a second divided voltage according to the second supply voltage VDDD ' output from the power supply. The second comparator thoroughly compares the second divided voltage VD1 with the threshold voltage VTH, and generates a second comparison signal, the level shift (four) 418_bit, and the second comparison, the level of the RSD. If the second divided voltage VD1 is less than the threshold voltage VTH, the second comparison signal RSD is at a high potential' indicating that the source driver is about to be turned off. If the second divided voltage VD1 is greater than the critical value „VTH, the Bellows two comparison signal RSD is low, indicating that the power supply is normally powered to the source driver. In this embodiment, the voltage of the first supply ink is greater than the first The voltage values of the two supply voltages VODD, the first comparator and the second comparator are respectively a high voltage component and a low voltage component. The setting of the first divided voltage VA1, the second divided voltage VD1, and the threshold voltage VTH can be used. It is decided that the threshold voltage VTH must be stable and not easily affected by the power supply output voltage, so that a threshold voltage vTH can be generated, for example, by a Band-gap Voltage Generator. And the second inverter 412 transmits the first comparison signal 12 201001382 RSA to one of the inputs of the OR gate 426. The third inverter 414, the fourth inverter 416, the level shifter 418 and the fifth inverter 42〇 transmits the second comparison signal RSD to the other input of the OR gate 426, wherein the level shifter 418 is used to shift the second comparison signal RSD. If the first comparison signal RS A and the second comparison signal RSD are both For low electricity - Then, the gate 426 outputs a low potential signal, indicating that the power supply is normally powered to the source driver, so no reset signal is generated. Conversely, if the first comparison signal RSA and/or the second comparison signal RSD are high The potential, or the gate 426 outputs a high-potential signal, indicating that the power supply is about to be turned off, and a reset signal RS is generated. According to the above-mentioned example, in order to improve the shutdown noise of the display, the power supply can be discriminated first. Whether the source driver enters the off state; when the power supply and the source driver enter the off state, the charge on the output of the source driver is redistributed, and the output of the source driver is disconnected from the channel, thus avoiding the display The present invention has been disclosed in the above-described preferred embodiments, and the present invention is not limited to the present invention, and any one of ordinary skill in the art to which the present invention pertains, without departing from the spirit of the present invention. In the scope, when various changes and retouchings can be made, the capture of the invention is in the form of a patent application scope. BRIEF DESCRIPTION OF THE DRAWINGS [Brief Description] Features, advantages, and implementations are as follows: In order to make the above and other objects of the present invention more obvious and easy to understand, the detailed description of the drawings 13 201001382 The first figure shows the conventional source 2A is a schematic diagram of a source driver of an embodiment of the present invention. FIG. 2B is a schematic diagram of a source driver according to another embodiment of the present invention. FIG. 2C is a schematic diagram of the source driver of the present invention. A schematic diagram of a source driver of an embodiment. FIG. 3 is a schematic diagram of a source driver according to still another embodiment of the present invention. Figure 4 is a schematic view of a voltage drop detector according to an embodiment of the present invention. [Main component symbol description] 100: source driver 312: multiplexer 108: channel 314: output terminal 112: multiplexer 318: data bus 114: output terminal 320: charge sharing switch 118 • tributary bus 3 22: shift register 122: shift register 324: first latch 124: first latch 3 26: second latch 126: second latch 328: level shifter 128: level Shifter 3 30: Digital/analog converter 130: Digital/analog converter 333: latch unit 133: latch unit 402: first voltage divider 200: source driver 404: second voltage divider 202: power supply 406: first comparator 204: voltage drop detector 408: second comparator 14 201001382 206: controller 410: first inverter 208: channel 412: second inverter 212: multiplexer 414 : Third inverter 214 : Output terminal 416 : Fourth inverter 220 : Charge sharing switch 418 : Level shifter 222 : Voltage switch 420 : Fifth inverter 224 : Ground terminal 422 : Reverse or gate 300 : :Source Driver 424 : Sixth Phase 302:: power supply 426: OR gate 304:: voltage drop detector 306: controller 308: Channel 15