200937378 九、發明說明： 【發明所屬之技術領域】 本發明係為一種液晶顯示器驅動裝置，尤指一種利用 金屬線玻璃接合技術（WOG)且在源極驅動電路之間傳遞影 像訊號之串接式驅動裝置。 【先前技術】 薄膜電晶體液晶顯示器（TFT LCD)主要由薄膜電晶體薄 ❹膜電晶體液晶顯示器（TFT LCD)主要由薄膜電晶體負責開關 排成陣列狀的液晶光閥，再配合彩色滤光層提供遽光效 果’以達成影像的全彩顯示。薄膜電晶體液晶顯示器之驅 動系統主要包含閘極驅動器（Gate Driver )晶片、源極驅動 器（Source Driver )晶片、及時序控制器（Timing Controller ; TCON或T-CON )晶片，以將電力、控制及影 像資料訊號傳送到玻璃板上的薄膜電晶體開關。再者，液 晶顯不器之驅動系統亦可能需要運算放大器（Operational ❹Am^llfle1· ’ OPAMP)或緩衝器（Buffer )的搭配。源極驅 動器有時也稱為資料驅動器（)，而閘極驅動器 則稱為掃瞒驅動器（ScanMver)。 、為了簡化晶片封裝，時序控制器（TCON )有時會與 源極驅動器—.ρη . ρ Μ Η整合、封裝；而閘極驅動器則整合直流電 壓專電路，I pg ^ $閑極開啟控制電壓（VGH)、閘極關閉控制電 壓（VGL)、τ ρτλ , HD共用驅動電極（VCOM)及數位電源 (VDD)。 第一圖郎· - a Μ Μ不為習知技術的TFT-LCD驅動系統，該 6 200937378 TFT-LCD驅動系統主要包含一閘極驅動器1〇、多數之源極 驅動器12、軟性電路板2及位在軟性電路板2上之多數訊 唬連接線14及電力連接線14a及電力連接線1〇&。 該閘極驅動器1〇擺放位置需視產品的解析度而定，且 因現在的TFT-LCD朝向高解析度畫素’所以閘極驅動器1〇 大夕因面板设計時的線路限制，而擺放在tft_lcd的短 邊。各個源極驅動器12對外之同步訊號、影像訊號、直流 〇電壓等都需外拉到客戶的系統板（未圖示）上；例如將時 序（TIMING)訊號、影像訊號、直流電壓等線路在各相對位 置上經玻璃（GLASS)到軟性電路板（Fpc)再透過訊號連接 線14與後端之客戶系統進行連接，因此產生如第一圖所示 之大面積的線路設計。軟性電路板2上的多數訊號連接線 14都是分段且定義相同之訊號與直流電壓， 多的軟性電路板材料。 買相田 以RGB的影像介面而 一 右mLCD的解析度是RGB ❹兀，則影像訊號就有24條線，加上同步訊號及時脈 ，虎有4條線，直流電壓有上述所提及的閘極開啟控制電 堡、閘極關閉控制電遂、LCD共用驅動電極及數位電 總共要併排33條線，這樣會耗費相當大的面 Γ軟電路板2須連接後端之客戶系統的-小段，使 ==:::2成丁字型’而造成軟性電路板礙在生產排 板上的數量降低，使得成本一直無法下降。200937378 IX. Description of the Invention: [Technical Field] The present invention relates to a liquid crystal display driving device, and more particularly to a serial connection using a wire bonding technique (WOG) and transmitting image signals between source driving circuits. Drive unit. [Prior Art] A thin film transistor liquid crystal display (TFT LCD) is mainly composed of a thin film transistor, a thin film transistor liquid crystal display (TFT LCD), which is mainly composed of a thin film transistor and is arranged in an array of liquid crystal light valves, and is matched with color filter. The layer provides a twilight effect' to achieve a full color display of the image. The driving system of the thin film transistor liquid crystal display mainly includes a gate driver chip, a source driver chip, and a timing controller (TCON or T-CON) chip to power, control and The image data signal is transmitted to the thin film transistor switch on the glass plate. Furthermore, the drive system of the liquid crystal display may also require an operational amplifier (Operational ❹Am^llfle1· 'OPAMP) or a buffer (Buffer). The source driver is sometimes referred to as the data driver () and the gate driver is called the sweep driver (ScanMver). In order to simplify the chip package, the timing controller (TCON) is sometimes integrated and packaged with the source driver -.ρη . ρ Μ ;; and the gate driver is integrated with the DC voltage circuit, I pg ^ $ idler turn-on control voltage (VGH), gate off control voltage (VGL), τ ρτλ , HD shared drive electrode (VCOM) and digital power supply (VDD). The first TU · - a Μ Μ is not a conventional TFT-LCD drive system, the 6 200937378 TFT-LCD drive system mainly includes a gate driver 1 多数, a majority of the source driver 12, a flexible circuit board 2 The majority of the signal connection line 14 and the power connection line 14a and the power connection line 1〇& are located on the flexible circuit board 2. The position of the gate driver 1〇 depends on the resolution of the product, and since the current TFT-LCD is oriented toward a high-resolution pixel, the gate driver 1 is placed on the line limit of the panel design. Place it on the short side of tft_lcd. Each source driver 12 external signal, image signal, DC voltage, etc. need to be pulled out to the customer's system board (not shown); for example, timing (TIMING) signal, video signal, DC voltage, etc. In a relative position, the glass (GLASS) to the flexible circuit board (Fpc) is connected to the client system at the back end through the signal connection line 14, thereby producing a large-area line design as shown in the first figure. Most of the signal connections 14 on the flexible circuit board 2 are segmented and define the same signal and DC voltage, and more flexible circuit board material. Buy Aitian with RGB image interface and a right mLCD resolution is RGB ❹兀, then the image signal has 24 lines, plus the synchronization signal and pulse, the tiger has 4 lines, the DC voltage has the above mentioned gate The pole opening control electric bunker, the gate closing control electric cymbal, the LCD common driving electrode and the digital electric power have a total of 33 lines side by side, which will consume a considerable amount of the surface of the soft circuit board 2 to be connected to the back end of the customer system - small section, Making ==:::2 into a T-shape' causes a reduction in the number of flexible circuit boards on the production board, so that the cost cannot be reduced.
Lr二後端之客戶系統的每個產品線路佈局不同，因此 ⑽廠在設計生產上就必須客製化，也因此會產生不同機 7 200937378 種不同軟性電路板設計來對應’因此在研發生產尚無法達 到共用與降低成本的目的。若是客戶系統的產品使用相同 的驅動器，而只有面板玻璃的尺寸變化，則整個電子設計 又要重新設計及驗證。 【發明内容】 本發明之目的在於提出一種可縮小所需軟性電路板尺 寸、以達成不同尺寸液晶顯示器皆可共用軟性電路板之串 _ 接式驅動裝置。 ❹ 為了達到上述之目的，本發明之串接式驅動裝置包含 一閘極驅動電路、多數之源極驅動電路及連接於該些源極 驅動電路之間的金屬訊號線，其中該金屬訊號線係形成在 一玻璃板上。一最近端源極驅動電路係接收來自一系統端 之影像訊號，並將影像訊號藉由該金屬訊號線傳自下一源 極驅動電路。每一源極驅動電路可受一輸入選擇訊號控制 而選擇性地接收TTL介面輸入訊號或是lvds介面輸入訊 ❹號，並且傳到下一級源極驅動電路。由於影像訊號係由串 接之源極驅動電路處理並傳送，液晶顯示器可藉由固定寬 度之軟性電路板，而達成不同尺寸之面板驅動。 【實施方式】 第二圖係為本發明之液晶顯示器驅動裝置架構圖，該 顯丰器串接式驅動裝置係應用於一顯..示器中，且該顯示 至少包括一面板玻璃30及一軟性電路板32。該液晶顯示器 驅動裝置主要包含一電力供應電路320、一閘極驅動電路 3〇〇及多數源極驅動電路302A，302B等.·（圖示僅為3〇2A及 8 200937378 302B)，其中該電力供應電路32〇係位在該軟性電路板％ 上，而該閘極驅動電路300及該些源極驅動電路3〇2則位 於該面板玻璃30上。 該閉極驅動電路300包括一切換式電源（swiichp〇wer) 控制單元3000，並且電連接到位在軟性電路板32之一被動 元件電源3002，由於切換式電源技術需要使用電感，因此 該被動元件電源3002也包含電感部份（未圖示）。該閘極 ❹驅動電路300由該電力供應電路32〇所傳送過來之電力提 供運作功率，並由其切換式電源控制單元3〇〇〇決定該些源 極驅動電路之所需工作功率。該切換式電源控制單元3〇〇〇 控制被動元件電源3002產生工作功率，然後經由該面板玻 璃30上之金屬電源線42供應至各個源極驅動電路3〇2A， 302B"。 ’ 每一該源極驅動電路包括一時序控制單元32〇、一緩 衝式影像訊號接收單元322、及一收發器單元 〇 ( ) 324。由一系統端來之影像訊號係經由該面 板玻璃30上之金屬訊號線4〇而傳送到一最近端源極驅動電 路302A，該最近端源極驅動電路3〇2A係距離金屬訊號線4〇 之饋入點400最近之源極驅動電路。該金屬訊號線4〇由金 屬線玻璃接合技術(wire〇nglass，w〇G)所製成，且包含連接 饋入點400及該最近端源極驅動電路302A之一第一金屬線 段40a、連接該最近端源極驅動電路3〇2A及次一源極驅動 電路302B之一第二金屬線段4〇b.等多數金屬線段；藉由在 §亥面板玻璃30上提供金屬訊號線4〇達成輸入影像訊號與各 9 200937378 個源極驅動電路之訊號連接。 參見第三圖，該緩衝式影像訊號接收單元322主要包 含一具終端阻抗之缓衝器（buffer)3220、一匯流排切換輸入 部份（bus switching receiver)3221、一功率調節器（p0wer regulator)3222、一編碼器3224、一同步控制部份 (synchronization controller)3226。該缓衝器 3220 係自系統端或是 前一級源極驅動電路接收影像訊號並提供終端阻抗，以增 0 加系統穩定度。該匯流排切換輸入部份3221係電連接到該 緩衝器3220，且受一輸入選擇訊號Sel控制而選擇介面影 像輸入訊號Vin或是電晶體一電晶體邏輯 (Transistor-Transistor Logic, TTL )介面影像輸入訊號 Vin ; 其中該介面訊號可以為低電壓訊號（LVDS)、低擺幅訊號 (RSDS)、兩解析度多媒體介面（High-Definition Multimedia Interface，HDMI)訊號，或高速串列介面（SERIALRGB现）訊 號，下文中以LVDS訊號為例說明。功率調節部份3222係 ❹電連接到該匯流排切換輸入部份3221，以切換適合的操作 電源。該編碼器3224係電連接到該匯流排切換輸入部份 3221 ’且受該輪入選擇訊號Sel控制而選擇性地將影像輸 入訊號Vin重新編碼。例如在不需要重新編碼時，該編碼 器3224直接輸出（bypass)該影像輸入訊號vin ;在需要重新 編碼時，該編碼器3224將TTL介面影像輸入訊號Vin重新 編碼成LVDS介面影像訊號，或是將LVDS介面影像輸入 戒號Vin重新編碼成ttL介面影像訊號。由於重新編碼需 要時間’編竭器3224輸出與輸入會有時差，因此該同步控 200937378 制部份3226係電連接義編碼$ 3224，以做時序同步。 復 > 見第一圖，該最近端源極驅動電路之緩衝式 影像訊號接收單元322自系統端接收-影像訊號，經過處 理後即由收發器單元324輸出。輪出之影像訊號經由第二 金屬線段.^次_祕轉|路遞之緩衝式影像訊 號接收單兀322處理。由於影像訊號係由串接之源極驅動 電路處理並傳送，因此並不需要依據源極驅動電路的多寡 而變更軟性電路板32之寬度。依據本發明之串接式驅動裝 置，即可藉由固^寬度之軟性電路板32，而達成不同尺 之面板玻璃30驅動。 在本發明實作時，於閘極驅動電路300及源極驅動電 二302之間原先有的串聯控制訊號3〇4仍然被保留 =^^直_鱗描㈣（STV)、水平線開始婦描 2 _)、懸料輸“能《(瓣）、源極線路輸 〇 2致此訊號_)、料上下反轉控制職_及影像左 右反轉控制訊號（RL)。 :上述說明可以看出：本發明之串接式驅動裝置可以 =串接之源極驅動電路來處理及傳送影像訊號，有助於 在液晶顯示H巾縮小所需餘電路板尺寸，、 寸液晶顯示器皆可共用軟性電路板之功效。 5尺 綜上所述，當知本發明已具有產業 用進步^又本她構㈣曾見靖產品及Γ Γ 元全符合發料利申請要件，爰依專利 ϋ 【圖式簡單說明】 出申印。 200937378 第一圖為習知技術的TFT-LCD驅動架構。 第二圖為本發明之液晶顯示器驅動裝置架構圖。 第三圖為本發明之緩衝式影像訊號接收單元。 【主要元件符號說明】 【習知】 軟性電路板2 閘極驅動器10 源極驅動器12 訊號連接線14 電力連接線14a 電力連接線10a 【本發明】 面板玻璃30 軟性電路板32 電力供應電路320 閘極驅動電路300 切換式電源控制單元3000 被動元件電源 3002Lr two back-end customer system has different product line layouts, so (10) the factory must be customized in design and production, and therefore will produce different machines 7 200937378 different flexible circuit board designs to correspond to 'so in research and development production The purpose of sharing and reducing costs cannot be achieved. If the customer's system uses the same drive and only the panel glass changes in size, the entire electronic design is redesigned and verified. SUMMARY OF THE INVENTION An object of the present invention is to provide a string-type driving device that can reduce the size of a required flexible circuit board to achieve a different size of a liquid crystal display.串 In order to achieve the above object, the series-connected driving device of the present invention comprises a gate driving circuit, a plurality of source driving circuits and a metal signal line connected between the source driving circuits, wherein the metal signal line system Formed on a glass plate. A near-end source driving circuit receives an image signal from a system end and transmits the image signal from the next source driving circuit through the metal signal line. Each source driver circuit can be selectively controlled by an input selection signal to selectively receive a TTL interface input signal or an lvds interface input signal and pass to the next stage source driver circuit. Since the image signal is processed and transmitted by the series source driving circuit, the liquid crystal display can achieve panel driving of different sizes by a flexible circuit board of a fixed width. [Embodiment] The second figure is a structural diagram of a liquid crystal display driving device of the present invention. The display device is connected to a display device, and the display includes at least one panel glass 30 and one Flexible circuit board 32. The liquid crystal display driving device mainly comprises a power supply circuit 320, a gate driving circuit 3, and a plurality of source driving circuits 302A, 302B, etc. (the illustrations are only 3〇2A and 8200937378 302B), wherein the power is The supply circuit 32 is located on the flexible circuit board %, and the gate drive circuit 300 and the source drive circuits 3〇2 are located on the panel glass 30. The closed-circuit driving circuit 300 includes a switching power supply unit 3000 and is electrically connected to a passive component power supply 3002 located on the flexible circuit board 32. Since the switched power supply technology requires the use of an inductor, the passive component power supply The 3002 also contains an inductive part (not shown). The gate driving circuit 300 supplies operating power from the power transmitted from the power supply circuit 32, and the switching power supply control unit 3 determines the required operating power of the source driving circuits. The switching power supply control unit 3 〇〇〇 controls the passive component power supply 3002 to generate operating power, and then supplies it to the respective source driving circuits 3〇2A, 302B" via the metal power supply line 42 on the panel glass 30. Each of the source driving circuits includes a timing control unit 32, a buffered video signal receiving unit 322, and a transceiver unit 〇 ( ) 324. The image signal from a system terminal is transmitted to a nearest source driving circuit 302A via the metal signal line 4 on the panel glass 30. The nearest source driving circuit 3〇2A is connected to the metal signal line 4〇. The feed point 400 is the nearest source drive circuit. The metal signal line 4 is made of wire-bonding technology (wire〇nglass, w〇G), and includes a connection feeding point 400 and a first metal line segment 40a of the nearest-end source driving circuit 302A, and a connection. a plurality of metal line segments such as a second metal line segment 4〇b. of the nearest-end source driving circuit 3〇2A and the next-source driving circuit 302B; and an input by providing a metal signal line 4 on the glass 30 of the panel The image signal is connected to the signal of each of the 9 200937378 source driver circuits. Referring to the third figure, the buffered video signal receiving unit 322 mainly includes a buffer (32) with a terminal impedance, a bus switching receiver 3221, and a power regulator (p0wer regulator). 3222, an encoder 3224, and a synchronization controller 3226. The buffer 3220 receives image signals from the system side or the previous stage source driving circuit and provides terminal impedance to increase the system stability. The bus switching input portion 3221 is electrically connected to the buffer 3220, and is controlled by an input selection signal Sel to select an interface image input signal Vin or a Transistor-Transistor Logic (TTL) interface image. The input signal Vin; wherein the interface signal can be a low voltage signal (LVDS), a low swing signal (RSDS), a high-definition multimedia interface (HDMI) signal, or a high-speed serial interface (SERIALRGB) Signal, the following is an example of the LVDS signal. The power conditioning section 3222 is electrically coupled to the busbar switching input section 3221 to switch the appropriate operating power source. The encoder 3224 is electrically coupled to the bus switching input portion 3221' and is selectively re-encoded by the wheel input selection signal Sel. For example, when the re-encoding is not required, the encoder 3224 directly passes the image input signal vin; when the re-encoding is required, the encoder 3224 re-encodes the TTL interface image input signal Vin into an LVDS interface image signal, or Recode the LVDS interface image input ring Vin into the ttL interface image signal. Since the re-encoding takes time, the output of the 3224 output and the input will have a time difference, so the synchronous control 200937378 system 3226 is electrically connected to the code $3224 for timing synchronization. > See the first figure, the buffered video signal receiving unit 322 of the near-end source driving circuit receives the image signal from the system end, and is processed by the transceiver unit 324 after processing. The image signal that is rotated out is processed by the second metal line segment. The second-time _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Since the image signal is processed and transmitted by the series-connected source driving circuit, it is not necessary to change the width of the flexible circuit board 32 depending on the amount of the source driving circuit. According to the tandem type driving device of the present invention, the panel glass 30 of different sizes can be driven by the flexible circuit board 32 having a fixed width. In the practice of the present invention, the original series control signal 3〇4 between the gate driving circuit 300 and the source driving power 302 is still reserved = ^^直_scale (4) (STV), horizontal line start 2 _), suspending material input "can" (valve), source line transmission 2 to this signal _), material up and down reversal control position _ and image left and right reversal control signal (RL). The series-connected driving device of the present invention can process and transmit image signals by the series-connected source driving circuit, which helps to reduce the size of the required circuit board in the liquid crystal display H-belt, and the liquid crystal display can share the flexible circuit. The effect of the board. 5 feet in summary, when the knowledge of the invention has industrial progress ^ and her structure (four) have seen Jing products and Γ Γ yuan full compliance with the application requirements, according to the patent ϋ [schematic description] The first picture shows the TFT-LCD driver architecture of the prior art. The second figure is the architecture diagram of the liquid crystal display driver device of the present invention. The third figure is the buffered image signal receiving unit of the present invention. Symbol Description] [Practical] Soft Circuit board 2 gate driver 10 source driver 12 signal connection line 14 power connection line 14a power connection line 10a [invention] panel glass 30 flexible circuit board 32 power supply circuit 320 gate drive circuit 300 switching power supply control unit 3000 passive Component power supply 3002
源極驅動電路302A, 302B 時序控制單元320 缓衝式影像訊號接收單元322 緩衝器3220 匯流排切換輸入部份3221 功率調節部份 3222 編碼器3224 同步控制部份.3226 收發器單元324 串聯控制訊號304 金屬訊號線40 12 200937378 第一金屬線段40a 第二金屬線段40b 饋入點400Source drive circuit 302A, 302B timing control unit 320 buffered video signal receiving unit 322 buffer 3220 bus switch input portion 3221 power adjustment portion 3222 encoder 3224 synchronous control portion. 3226 transceiver unit 324 serial control signal 304 metal signal line 40 12 200937378 first metal line segment 40a second metal line segment 40b feed point 400
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