201128615 六、發明說明： 【發明所屬之技術領域】 本發明係有關於一種源極,驢動裔’尤指一種可以在不增加晶片 面積下具有較佳驅動能力的源極驅動器，以及相關的驅動方法。 【先前技術】 在薄膜電晶體液晶顯示器（Thin-mm transistor liquid crystal display’TFT-LCD)的源極驅動器中’-多工器通常被設置在源極驅 動器的輸出級之後（如第1圖所示）以提供較高的阻抗以及極性反 轉的功能。第1圖為一源極驅動器中的兩個輸出緩衝器1〇2、1〇4 以及一多工器106的示意圖，其中輸出緩衝器1〇2、1〇4分別具有輸 入端點Nin_i、Nin_2 ’且多工器106具有兩個輸出端點队山1以及201128615 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a source, which is a source driver that can have better driving capability without increasing the chip area, and related driving. method. [Prior Art] In a source driver of a thin-film transistor liquid crystal display (TFT-LCD), a '-multiplexer is usually disposed after the output stage of the source driver (as shown in FIG. 1). Show) to provide higher impedance and polarity reversal. 1 is a schematic diagram of two output buffers 1〇2, 1〇4 and a multiplexer 106 in a source driver, wherein the output buffers 1〇2, 1〇4 have input terminals Nin_i, Nin_2, respectively. 'And multiplexer 106 has two output endpoints, Team Hill 1 and
Nout_2。在第1圖中’多工器106可以視為耦接於輪出緩衝器1〇2、 104以及輸出端點N0UtJ、Nout_2之間的-個等效電阻，因此，會影 響到源極驅動器的驅動能力。此外，為了避免上述源極驅動器之驅 動能力下降的情形’多工器106的晶片面積必須要增加以降低其等 效電阻’然而’晶片面積增加代表著源極驅動器的製作成本也會增 加。 【發明内容】 201128615 因此本發明的目的之—在於提供—獅極驅鮮及其相關的 驅動方法’使得祕轉器可以在不增加晶4面積下具有較佳驅動 月b力，因此可以解決上述的問題。Nout_2. In Fig. 1, the multiplexer 106 can be regarded as an equivalent resistance coupled between the wheel-out buffers 1, 2, 104 and the output terminals N0UtJ, Nout_2, thus affecting the source driver. Drive capability. Further, in order to avoid a situation in which the driving ability of the above-described source driver is lowered, the wafer area of the multiplexer 106 must be increased to lower its equivalent resistance. However, the increase in the wafer area means that the manufacturing cost of the source driver is also increased. SUMMARY OF THE INVENTION 201128615 Therefore, the object of the present invention is to provide a lion-preventing and related driving method that enables the snail to have a better driving month b force without increasing the area of the crystal 4, thus solving the above problem. The problem.
將該第一輸入埠耦接於該第二輸出埠， 第一輸出崞。 第-通道’其中该第—通道包含有—第—差動放大器以及一第一 輸出級’且該第二通道包含有—第二差動放大器以及-第二輸出 級。該第-差動放大⑽用來接收—第—差動對輸人訊號以產生一 第差動對輸出訊號；該第二差動放大器係用來接收一第二差動對 輸入為纽產生__第二差動對輸出訊號；該多工科有祕於該第 —差動放大n且用來接收該第―差動對輸出訊號之—第—輸入谭、 麵接於料—差動放且絲接收該第二差動職出訊號之一第 二輸入埠、输於該第-輸出級之—第—輸料、以綠接於該第 :輸出級之-第二輸出埠，其中當該多工器位於—第—組態時，該 夕工器將該第-輸人埠耦接於該第—輸㈣，且將該第二輸入輪 接於該第二輸出埠；以及當該多卫器位於—第二組態時，該多工号 且將該第二輸轉棘接於該 依據本發明之另-實施例’-獅極驅動器的驅動方法包含 有：接收一第一差動對輸入訊號以產生一 收一The first input port is coupled to the second output port, the first output port. The first channel 'where the first channel includes a -differential amplifier and a first output stage' and the second channel includes a second differential amplifier and a second output stage. The first differential amplifier (10) is configured to receive a first-differential pair input signal to generate a differential pair output signal; the second differential amplifier is configured to receive a second differential pair input to generate a signal _ second differential pair output signal; the multiplex has secrets the first-differential amplification n and is used to receive the first-differential pair output signal - the first input tan, the surface is connected to the material - the differential The wire receives a second input port of the second differential operation signal, a first output to the first output stage, and a green output to the second output port of the output stage. When the multiplexer is located in the -first configuration, the evening device couples the first input port to the first input (four), and connects the second input wheel to the second output port; and when the When the guard is located in the second configuration, the multi-tasking and the second transmission is spliced to the driving method of the lion driver according to another embodiment of the present invention includes: receiving a first differential Input signal to generate a revenue
第—差動對輸出訊號 叮轲出訊號；接 孔號；提供一多 201128615 來接收該第—差動對輸出訊號之-第- 輸出埠，其中當該多^位於—=_於—第二輸出級之一第二 入埠執接於該第-輪出痒，且組=該多工器將該第—輪 埠，·以及當該多工器位於—第一輸接於該第二輪出 第一輸出埠，且將該第二輸入物妾於該第-輸出埠。 【實施方式】 π在Γ明書錢物請細贿巾制了某_彙來指稱特 、π所屬領域巾具有通常知識者應可理解，硬體製造商可能 s用不同的名㈣來射同—個元件。本綱書及㈣ 圍並不以鍋差異來作為區分峨方式，錢以元件在功能1 的差^來作為區分的準則。在财綱書及後續的請求項當中所提 、的匕δ」係為-開放式的用語，故應解釋成「包含但不限定於」。 以外’「祕」-詞在此係包含任何直接及間接的電氣連接手段。因 此’若文中描述-第-裝置输於—第二裝置，則代表該第一裝置 可直接電氣連接賊第二裝置’或親其他裝置或連接手段間接地 電氣連接至諒第二裝置。 明參考第2圖’第2圖為依據本發明一實施例之源極驅動器2〇〇 的不思圖。如第2圖所示’源極驅動器2〇〇包含有一第一通道21〇、 201128615 一第二通道220以及一多工器230，其中第一通道2i〇包含有一差 動放大器211、一輸出級212以及一第一控制電路213，且第二通道 220包含有-差動放大器22卜一輸出級迎以及一第二控制電路 223。輸出級212包含有兩個以疊接方式（casc〇de)相連之電晶體 Μ卜M2 ’且輸出級222包含有兩個以疊接方式（casc〇de)相連之 電晶體M3、M4。此外，第一通道21〇以及第二通道22〇係為相鄰 的通道，且分別用來接收輸入訊號2，並分別產生輸出訊 號V—、Vout_2至一像素陣列（未綠示）。此外，源極驅動器係 應用於一液晶顯示裝置中。 在源極驅動器2GG的操作上，首先，差動放大器211接收一差 動對輸入訊號域生-差麟輸出訊號Vi+以及％•，且差動放大器 221接收-差動對輸入訊號以產生一差動對輸出訊號％以及i 接著’在一第一時段中，多工器230係、操作於-第-組態，此時多 工W3〇將差動對輸出訊號Vl+以及Vi•傳送至輸出級加，並將差 動對輸出減V2+以及％顧至輸出級如；以及在緊接於第一時 ^-第二時段中’輸出訊號％、％需要進行極性反則 工器23〇係操作於-第二⑽ =V1+以及Vl•傳送至輸出議，並將差動勸訊號^以及 2-=輸出級212。最後，輸出級212接收來自多工器 =輸出訊號以產生輸出峨U像素陣顺 的 級2=來自多。的差動對輪出訊= 出。孔戒ν(2至像鱗列以驅動相對應的像素。 201128615 以4-轉換脈波（加伽驗，订）訊號被致能時，亦即， 第-通道以及第二通道挪被阻止將輸出訊號ν—、％輸 出至像素陣财時，第—控制電路213除能（此則輸出級:， 且第二控制電路223除能輸出級222。 為了更清楚了解多工器23〇、第一控制電路213以及第二控制 電路223的操作，請參考第3圖，第3圖為多工器23〇、第―才:制 電路213以及第二控制電路223的電路示意圖。如第3圖所示:多 工器230包含有耦接於差動放大器211之一第一輸入埠（節點Μ 以及A)、耦接於差動放大器221之一第二輸入埠（節點以及 队）、柄接於輸出級212之一第一輸出琿（節點以及]s[6)、耗接 於輸出級222之一第二輸出埠（節點&以及Ns)、以及八個開關 SW1〜SW8。此外，第一控制電路213包含有耦接於一供應電壓VDD 以及電晶體Ml之閘級之一開關SW9,以及柄接於一接地電壓gnd 以及電晶體M2之閘級之一開關SW10 ;而第二控制電路223包含 有搞接於供應電壓VDD以及電晶體M3之閘級之一開關SW11，以 及耦接於接地電壓GND以及電晶體M4之閘級之一開關SW12。此 外，開關SW1〜SW12可以使用N型金氧半導體(N-typeMetal-Oxide Semiconductor,NM0S)、Ρ5ί!金氧半導體（Metal-Oxide Semiconductor，PM0S)、傳輸閘（transmission gate)或是其他任何 形式的開關電路來實現。 201128615 在上述之該第-時段中，多工器23〇係操作於該第一纽熊 時開關 SW卜 SW2、SW7、SW8 被開啟（switched 〇n)且’The first-differential signal is outputted to the output signal; the number of the hole is provided; and a plurality of 201128615 is provided to receive the first-output 埠 of the first-differential pair output signal, wherein when the multi-position is located at -=_--the second One of the output stages is connected to the first round of the itching, and the group = the multiplexer will be the first rim, and when the multiplexer is located - the first is connected to the second round A first output 出 is output, and the second input is entangled in the first output 埠. [Embodiment] π in the Ming Dynasty book money, please make a bribe to make a certain _ Huilai alleged special, π belongs to the field towel with the usual knowledge should be understandable, the hardware manufacturer may use different names (four) to shoot - a component. This appendix and (4) do not use the difference in pot as a way of distinguishing between the two, and the money is used as the criterion for distinguishing the difference between the components and the function 1. The 匕δ" mentioned in the Financial Secretary and subsequent claims is an open-ended term and should be interpreted as "including but not limited to". The term "secret" - the term contains any direct and indirect electrical connection means. Thus, if the second device is described in the context of the first device, the first device can be electrically connected directly to the thief second device or the other device or connection means can be indirectly electrically connected to the second device. Referring to FIG. 2', FIG. 2 is a schematic view of a source driver 2A according to an embodiment of the present invention. As shown in FIG. 2, the source driver 2 includes a first channel 21, a 201128615, a second channel 220, and a multiplexer 230. The first channel 2i includes a differential amplifier 211 and an output stage. 212 and a first control circuit 213, and the second channel 220 includes a differential amplifier 22, an output stage, and a second control circuit 223. The output stage 212 includes two transistors M2' connected in a stacked manner and the output stage 222 includes two transistors M3, M4 connected in a stacked manner (casc〇de). In addition, the first channel 21〇 and the second channel 22 are adjacent channels, and are respectively used for receiving the input signal 2, and respectively generating the output signals V_, Vout_2 to an array of pixels (not shown). Further, the source driver is applied to a liquid crystal display device. In operation of the source driver 2GG, first, the differential amplifier 211 receives a differential pair input signal domain-to-sequence output signal Vi+ and %•, and the differential amplifier 221 receives the differential-to-input signal to generate a difference. The pair of output signals % and i are then 'in a first period of time, the multiplexer 230 is operated in the -first configuration, at which time the multiplexed W3 〇 transmits the differential pair output signals Vl+ and Vi• to the output stage. Plus, and the differential output is reduced by V2+ and the % is taken to the output stage as well; and immediately after the first time ^-the second period of time, the output signal %, % needs to be subjected to the polarity inverse timer 23 operation - The second (10) = V1+ and V1 are transmitted to the output and the differential advisory number ^ and the 2-= output stage 212. Finally, the output stage 212 receives the level 2 = from the multiplexer = output signal to produce the output 像素 U pixel array. The difference is on the round of the news = out. Hole ring ν (2 to scale to drive the corresponding pixel. 201128615 When the 4-switch pulse (plus gamma, order) signal is enabled, that is, the first channel and the second channel are blocked When the output signal ν—, % is output to the pixel array, the first control circuit 213 is disabled (the output stage is: and the second control circuit 223 is disabled by the output stage 222. To understand the multiplexer 23 〇, For the operation of a control circuit 213 and a second control circuit 223, please refer to FIG. 3, which is a circuit diagram of the multiplexer 23A, the first circuit 213, and the second control circuit 223. The multiplexer 230 includes a first input port (nodes Μ and A) coupled to the differential amplifier 211, a second input port (node and team) coupled to the differential amplifier 221, and a handle connection. The first output 珲 (node and ] s [6) of one of the output stages 212, the second output 埠 (node & and Ns) of one of the output stages 222, and the eight switches SW1 SWSW8. A control circuit 213 includes a switch SW9 coupled to a supply voltage VDD and a gate of the transistor M1 to The handle is connected to a ground voltage gnd and one of the gates of the transistor M2, the switch SW10; and the second control circuit 223 includes a switch SW11 connected to the supply voltage VDD and the gate of the transistor M3, and coupled to the ground. The voltage GND and one of the gates of the transistor M4 are switched to the switch SW12. In addition, the switches SW1 to SW12 can use N-type Metal-Oxide Semiconductor (NM0S), Ρ5ί! metal oxide semiconductor (Metal-Oxide Semiconductor, PM0S). , the transmission gate or any other type of switching circuit is implemented. 201128615 In the above-mentioned first period, the multiplexer 23 is operated by the first button, the switch SW, SW2, SW7, SW8 is turned on (switched 〇n) and '
SW3〜SW6係被義（sw触_)，因此第—輸人埠（節㈣、 及N2)係摘於第一輸出痒（節料以及n6)，且第二輪1二 點n3以及N4)係稱接於第二輸出璋（節點&以及Ν§)二 出訊號因此可以經由多工㈣傳送至輸出級 差動對輸出訊號％以及％·因此可以經由多工器挪傳送 ，'另-方面，在緊接於上述之該第二時段中，輸出訊號％及 V0UL2柏要進行極性反轉，此時開關sw、SW2、SW7、s皮 閉㈤tchedoff)且開關SW3〜SW6係被開啟（sw触ed〇n)， 第，入蟑⑽Nl以及N2)係耦接於第二輸鱗（節點&以及 8)，且第—輸人璋（節點％以及N4)係_於第—輸料（節點 N5、以及N6)’差動對輸出訊號％以及％因此可以經由多工器咖 傳达至輸出級222，且差動對輸出訊號％以及％因此可以經由多 工器230傳送至輸出級212。 此外，當轉換脈波（TP)訊號被致能時，開關_~_2係 被開啟（sw馳edGn)，亦即電日日日㈣刚係被關閉以阻止第一通 道210以及第二通道22〇將輪出訊號I」、％輸出至像素陣列 請參考第4圖’第4圖為依據本發明一實施例之一源極驅鮮 之驅動方法喊程圖。需注意的是，若是有實質上相同的結果，^ 201128615 發明之驅動方法的步驟並不以第4圖所示的流程順序為限。參 4圖，源極驅動器之驅動方法敘述如下： 〆 訊 步驟:接收—第—差動對輸人訊號以產生-第-差動對輪出 號。 步驟402 :接收_第二差動對輸入訊號以產生 號。 一第二差動對輪出 訊 步驟404 :提供—多工器，其中該多卫器具有用來接收該第一差動 對輸出訊號之-第-輸人埠、用來接收該第二差動對輸 出訊號之-第二輪人埠、祕於—第—輪出級之—第〆 輸出埠、以及她於-第二輸出級之—第二輸出蜂，其 中當該多X器位於-第-組態時，該多卫器將該第一輸 ^阜祕於該第-輸料，邮該第二輸人埠_於該 第二輸出槔；以及當該多工器位於-第二組態時，該多 工器將該第-輸入埠耦接於該第二輸出埠，且將該第二 輸入埠耦接於該第一輸出埠。 簡要歸’林^明’在本發明之祕軸器以及源極驅動器的相 關驅動方法中，因為多工器係被設置於差動放大器以及輸出級之 門因此可以在不增加多工益之晶片面積下改善驅動能力，製造成 本也可因此降低。 以上所述僅為本發明之較佳實施例，凡依本發明申請專利範圍 201128615 所做之均等變化與修都，皆應屬本發明之涵蓋範圍。 【圖式簡單說明】 第1圖為習知源極驅動器的示意圖。 第2圖為依據本發明—實施例之源極驅動器的示意圖。 第3圖為第2圖所示之多工器、第一控制電路以及第二控制電路的 電路示意圖。 第4圖為依據本發明一實施例之一源極驅動器之驅動方法的流程 圖。 【主要元件符號說明】SW3~SW6 are righteous (sw touch_), so the first-input (埠(4), and N2) is extracted from the first output itching (nating and n6), and the second round is 1 two points n3 and N4) It is said that the second output signal (node & Ν and § §) can be transmitted to the output stage differential output signal % and % via multiplex (4). Therefore, it can be transmitted via the multiplexer. In the second period immediately following, the output signal % and V0UL2 are reversed in polarity, and at this time, the switches sw, SW2, SW7, s are closed (five) tchedoff, and the switches SW3 to SW6 are turned on (sw Touch ed〇n), the first, the enthalpy (10) Nl and N2) are coupled to the second scale (node & and 8), and the first-input 璋 (node % and N4) is the first-feed ( The node N5, and N6) 'differential pair output signals % and % can therefore be communicated to the output stage 222 via the multiplexer, and the differential pair output signals % and % can therefore be communicated to the output stage 212 via the multiplexer 230. . In addition, when the switching pulse (TP) signal is enabled, the switch _~_2 is turned on (sw edGn), that is, the electric day and day (four) is closed to block the first channel 210 and the second channel 22输出 Output the wheel signal I", % to the pixel array. Please refer to FIG. 4'. FIG. 4 is a schematic diagram of the driving method of the source driving according to an embodiment of the present invention. It should be noted that if there are substantially the same results, the steps of the driving method of the invention of 201182015 are not limited to the sequence of processes shown in FIG. Referring to Figure 4, the driving method of the source driver is described as follows: 〆 Step: Receive—the first-differential pair input signal to generate the -first-differential pair wheel number. Step 402: Receive a second differential pair input signal to generate a number. a second differential counter-slave step 404: providing a multiplexer, wherein the multi-guard has a -first-input for receiving the first differential pair output signal, for receiving the second differential For the output signal - the second round of the 埠, the secret - the first round of the — 〆 output, and her at the second output stage - the second output bee, where the multi-X is located - - during configuration, the multi-guard confuses the first transmission to the first-input, the second input _ to the second output 槔; and when the multiplexer is located - the second group In the state, the multiplexer couples the first input port to the second output port, and couples the second input port to the first output port. Briefly referred to as 'Lin ^ Ming' in the related shaft drive of the present invention and the related driving method of the source driver, since the multiplexer is disposed at the gate of the differential amplifier and the output stage, the wafer can be added without increasing the benefits. The driving ability can be improved under the area, and the manufacturing cost can also be reduced. The above description is only the preferred embodiment of the present invention, and all changes and modifications made to the patent application scope 201128615 of the present invention are within the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram of a conventional source driver. Figure 2 is a schematic illustration of a source driver in accordance with an embodiment of the present invention. Fig. 3 is a circuit diagram of the multiplexer, the first control circuit, and the second control circuit shown in Fig. 2. Fig. 4 is a flow chart showing a driving method of a source driver according to an embodiment of the present invention. [Main component symbol description]
102 、 104 輸出緩衝器 106 、 230 多工器 200 源極驅動器 210 第一通道 211 、 221 差動放大器 212 、 222 輸出級 213 第一控制器 220 第二通道 223 第二控制器 M1-M4 電晶體 11 201128615 SW1 〜SW12 N1 〜N8102, 104 output buffer 106, 230 multiplexer 200 source driver 210 first channel 211, 221 differential amplifier 212, 222 output stage 213 first controller 220 second channel 223 second controller M1-M4 transistor 11 201128615 SW1 ~ SW12 N1 ~ N8