1359615 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襞置，尤指一種具介 面轉換功能之液晶顯示器驅動裝置。 / 【先前技術】 主薄膜電晶體液晶顯示器（TFT LCD)主要由薄膜電晶體負 二開關排成陣列狀的液晶光閥，再配合彩色遽光層提供滤 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（GateDriver)晶片、源極 驅動器（SourceDriver)晶片、及時序控制器（Timing c〇ntroller ; TC0N或T_c⑽）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。 再者為了接收外界的影像訊號，液晶顯示器之驅動系 統須具有類比介面電路或是數位介面電路以與外界訊號源 連接。類比介面液晶顯示器之缺點為顯示的時候會出現圖 元閃爍的現象’這種現象出現的原因是時脈頻率與輸入的 類比信號不是百分之百同步，造成少數圖元點的閃燦。數 位介面的液晶顯示器就沒有將時脈頻率與類比信號調諧的 麻煩，因此逐漸盛行。目前主要之主要數位介面包含電晶 體一電晶體邏輯（Transistor-Transistor Logic，TTL )和低壓差動 # 號（low-voltage differential signaling，LVDS )兩種介面 ^夂弋 由於差動信號可以降低EMI電磁干擾，對於雜訊的免^力 (Noise lmmunity)較佳，因此LVDS介面可以提供更高速^資 6 1359615 第一圖所示為習知技術的TFT-LCD驅動系統，該 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 號連接線14及電力連接線及電力連接線i〇a。 在上述的TFT-LCD驅動系統中，由於各個源極驅動器 12對外之同步訊號、影像訊號、直流電壓等都需外拉到客 戶的系統板（未圖示）上，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，因此浪費相當多的軟 性電路板材料。 再者，源極驅動器12在設計上為了成本考量，往 往只會支援單-t影像通訊介®，因此當終端訊號與源極 驅動器12提供之影像通訊介面不同時，為了使該tft_lcd 驅動系統能夠接收TTL介面輸入訊號或差動訊號（例如 LVDS介面輸入訊號），設計上必須針對不同介面設計軟 鲁電路板，若對應到源極驅動器12只接受TTL訊號而終 端又是LVDS時，這時就要在設計上新增一 LV〇s轉丁几 的介面轉換電路，相反的就必需要有TTL轉lvds的介面 轉換電路，因此造成軟性電路板2設計會針對不同影像介 面設計而有不同機種別，而影像介面連接終端的連接器又 各不同’因此會造成開發成本上的浪費及備料上的困難， 甚至造成呆置料等問題。 【發明内容】 本發明之目的在於提出一種具介面轉換功能之液晶顯 7 1359615 示器驅動裝置。 為了達到上述之目的，本發明之具介面轉換功能之液 晶顯示器驅動裝置可接收一輸入選擇訊號及一影像輸入訊 號以驅冑液晶面板；其中該影像輸入訊號為丁几介面 輸入訊號或是差動（例如為LVDS )介面輪人訊號。該驅 動裝置具有-匯流排切換輸入單元，可受該輸入選擇訊號 控制’而選擇性接收TTL介面輸入訊號或是lvds介面輸 入訊號；-編碼器單元’電連接至該匯流排㈣輸入單元 並口可受該輸人選擇訊號控制，而選擇性地將ttl介面輸入 訊號或是LVDS介面輸人訊號重新編碼成介面㈣ ，是TTL介面訊號；及—收發器單元，電連接至該編碼器 早兀’以將該編碼器單元之輸出送至源極驅動電路。 【實施方式】 有關本發明的特徵與實作，兹配合圖示作最佳實施例 詳細說明如下： "月參考第一圖’第二圖係為本發明之具介面轉換功能 之液晶顯示器驅動裝置架構圖，該顯示器驅動裝置係應用 於-顯示器中’且該顯示器至少包括一面板玻璃3〇及一軟 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 32〇、一影像訊號轉換電路322、一閘極驅動電路及 多數源極驅動電路302，其中該電力供應電路32〇及該影 像訊號轉換電路322係位在該軟性電路板32上，而該問極 驅動電路300及該源極驅動電路3〇2則位於該面板玻璃邓 8 1359615 上。 遠閘極驅動電路300包括一直流電源單元3〇〇〇、一電 何泵功率控制單元3002、一過電流保護單元3〇〇4及一電壓 偵測回授單元3006。該源極驅動電路3〇2包括一時序控制 單元3020 影像机號接收單元3022及一終端阻抗3024。 »亥閘極驅動電路300由電荷泵功率控制單元3〇〇2送出 一控制訊號給電力供應電路320，由電力供應電路32〇作 •能量轉換後回送給直流電源單元3000作電源位準（level)的 轉換，然後經由該面板玻璃3〇上之金屬電源線42供應至各 個源極驅動電路302。該影像訊號轉換電路322係接收由 一系統端來之影像訊號Vin及一輸入選擇訊號Sd ，以將 TTL介面/ LVDS介面輸入訊號轉換為LVDS介面/ TTL ”面〜像輸出訊號V〇ut ’再傳送到該源極驅動電路π〗； 或者受該輸入選擇訊號Sel控制，而直接將TTL介面或 LVDS介面輸入訊號vin(亦即Vin=Vout)傳送至該源極驅動 • 電路302。 δ亥影像輸出訊號Vout係透過在該面板玻璃3〇上之金屬 訊號線40而傳送到每一源極驅動電路3〇2，其中該金屬訊 號線40由金屬線玻璃接合技術（wire 〇n giass，w〇G)所製成， 且包含連接影像訊號轉換電路322及一源極驅動電路3〇2 之第一金屬線段40a、連接該源極驅動電路302及次一源 極驅動電路302之第二金屬線段4〇b等多數金屬線段。藉 由在該面板玻璃30上提供金屬訊號線4〇達成影像訊號轉換 電路322與各個源極驅動電路3〇2之訊號連接，即可藉由 9 1359615 固定寬度之軟性電路板32，^1_成3同尺寸之面板玻璃30 驅動。 ------一 —該直流電源單元3000係提供有閘極開啟控制電壓、閘 極關閉控制電壓、LCD共用驅動電壓及數位電源等電源； 且直流電源電路3000所提供的各種電壓是透過該金屬電源 線42供應至各個源極驅動電路302。該電荷泵功率控制電 路3002連接於一電荷泵功率受控電路（未圖示），由電荷 泵功率受控電路接收電荷泵功率控制單元3002所傳送的一 控制訊號，以產生直流電源電路3000所需要的電壓。過電 流保護單元3004係用以防止因材料或製程異常造成直流電 源單元3000所提供的直流電流異常，而不慎燒毀金屬線玻 璃接合技術所設計的線路，造成面板玻璃30的報廢情形發 生。該電壓彳貞測回授單元3006係透過一電壓偵測回授線 44，以偵測因過長線路所造成的電壓降補償；該電壓偵測 回授線係連接到該金屬電源線42 —最遠端42a，以使該電 φ 壓偵測回授單元3006知悉該最遠端42a處之電壓，因此該 電壓偵測回授單元3006可知道是否因為線路過長而有電壓 不足之狀況。 參見第三圖，為本發明之影像訊號轉換電路322之方 塊圖，該影像訊號轉換電路322主要包含一匯流排切換輸 入單元（bus switching receiver)3220 ' —功率調節器（power regulator)3222、一編碼器單元3224、一同步控制單元 (synchronization controller)3226 及一收發器單元 3228。該匯流排 切換輸入單元3220係受輸入選擇訊號Sel控制而選擇 13596151359615 IX. Description of the Invention: [Technical Field] The present invention relates to a liquid crystal display driving device, and more particularly to a liquid crystal display driving device having a dielectric conversion function. / [Prior Art] The main thin film transistor liquid crystal display (TFT LCD) is mainly composed of a thin film transistor negative two switch arranged in an array of liquid crystal light valves, and then with a color light layer to provide a filtering effect 'to achieve full color display of the image . The driving system of the thin film transistor liquid crystal display mainly comprises a gate driver (GateDriver) chip, a source driver (SourceDriver) chip, and a timing controller (Timing c〇ntroller; TC0N or T_c(10)) chip for power, control and image data. The signal is transmitted to the thin film transistor switch on the glass. In order to receive the external image signal, the driving system of the liquid crystal display device must have an analog interface circuit or a digital interface circuit to connect with the external signal source. The disadvantage of analog interface LCD displays is that the picture flickers when displayed. This phenomenon occurs because the clock frequency and the analog signal of the input are not 100% synchronized, causing a few pixels to flash. Digital interface LCD monitors do not have the trouble of tuning the clock frequency and analog signal, so they are becoming more popular. At present, the main main digital interfaces include Transistor-Transistor Logic (TTL) and low-voltage differential signaling (LVDS) interfaces, which can reduce EMI electromagnetic emissions due to differential signals. Interference, Noise lmmunity is better, so the LVDS interface can provide higher speed. 6 1359615 The first picture shows the TFT-LCD drive system of the prior art. The TFT-LCD drive system is mainly The utility model comprises a gate driver 1 , a plurality of source drivers 12 , a flexible circuit board 2 , and a plurality of signal connection lines 14 and power connection lines and power connection lines i 〇 a located on the flexible circuit board 2 . In the TFT-LCD driving system described above, since the external source signal 12, the external signal, the video signal, the DC voltage, and the like are externally pulled onto the customer's system board (not shown), the first image is generated. Show the big face • The circuit design. Most of the signal connections 14 on the flexible circuit board 2 are segmented and define the same signal and DC voltage, thus wasting a significant amount of flexible board material. Furthermore, the source driver 12 is designed to support a single-t image communication medium for cost considerations, so that when the terminal signal is different from the image communication interface provided by the source driver 12, in order to enable the tft_lcd drive system Receiving a TTL interface input signal or a differential signal (such as an LVDS interface input signal), the design must design a soft circuit board for different interfaces. If the source driver 12 only accepts the TTL signal and the terminal is LVDS, then it is necessary In the design, a new interface conversion circuit of LV〇s to Dingji is added. On the contrary, an interface conversion circuit of TTL to lvds is required. Therefore, the design of the flexible circuit board 2 will be different for different image interface designs. The connectors of the image interface connection terminals are different, which may result in waste of development cost and difficulty in preparing materials, and even cause problems such as being left unloaded. SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display 7 1359615 display driving device with an interface conversion function. In order to achieve the above object, the liquid crystal display driving device with the interface conversion function of the present invention can receive an input selection signal and an image input signal to drive the liquid crystal panel; wherein the image input signal is a small input signal or a differential interface. (for example, LVDS) interface wheel signal. The driving device has a busbar switching input unit capable of selectively receiving a TTL interface input signal or an lvds interface input signal by the input selection signal control; the encoder unit is electrically connected to the busbar (4) input unit parallel port It can be controlled by the input signal of the input, and selectively recodes the ttl interface input signal or the LVDS interface input signal into an interface (4), which is a TTL interface signal; and - the transceiver unit is electrically connected to the encoder. 'To send the output of the encoder unit to the source driver circuit. [Embodiment] The features and implementations of the present invention are described in detail with reference to the preferred embodiments as follows: "Monthly reference to the first figure' The second figure is the liquid crystal display driver with the interface conversion function of the present invention. The device architecture diagram is applied to the display device and the display includes at least a panel glass 3 and a flexible circuit board 32. The liquid crystal display driving device mainly includes a power supply circuit 32, an image signal conversion circuit 322, a gate driving circuit and a plurality of source driving circuits 302, wherein the power supply circuit 32 and the image signal conversion circuit 322 are in the system. On the flexible circuit board 32, the gate driving circuit 300 and the source driving circuit 3〇2 are located on the panel glass Deng 8 1359615. The remote gate driving circuit 300 includes a DC power supply unit 3, an electric pump power control unit 3002, an overcurrent protection unit 3〇〇4, and a voltage detection feedback unit 3006. The source driving circuit 3〇2 includes a timing control unit 3020, a camera number receiving unit 3022, and a terminal impedance 3024. The sluice gate drive circuit 300 sends a control signal from the charge pump power control unit 〇〇2 to the power supply circuit 320, which is converted by the power supply circuit 32 and then returned to the DC power supply unit 3000 for power level (level). The conversion is then supplied to the respective source driving circuits 302 via the metal power line 42 on the panel glass. The image signal conversion circuit 322 receives the image signal Vin and an input selection signal Sd from a system to convert the TTL interface/LVDS interface input signal into an LVDS interface/TTL" surface~image output signal V〇ut' The signal is transmitted to the source driving circuit π 〖 or controlled by the input selection signal Sel, and the TTL interface or the LVDS interface input signal vin (that is, Vin=Vout) is directly transmitted to the source driving circuit 302. The output signal Vout is transmitted to each of the source driving circuits 3〇2 through the metal signal line 40 on the panel glass 3, wherein the metal signal line 40 is wire-bonded by wire 〇n giass, w〇 G), comprising a first metal line segment 40a connecting the image signal conversion circuit 322 and a source driving circuit 3〇2, and a second metal line segment connecting the source driving circuit 302 and the next source driving circuit 302 A plurality of metal segments, such as 4〇b, are obtained by providing a metal signal line 4 on the panel glass 30 to achieve signal connection between the image signal conversion circuit 322 and each of the source driving circuits 3〇2, which can be fixed by 9 1359615. The flexible circuit board 32, ^1_3 is driven by the same size panel glass 30. ------1—The DC power supply unit 3000 is provided with a gate opening control voltage, a gate closing control voltage, and an LCD sharing. A driving voltage and a power supply such as a digital power supply; and various voltages supplied from the DC power supply circuit 3000 are supplied to the respective source driving circuits 302 through the metal power supply line 42. The charge pump power control circuit 3002 is connected to a charge pump power control circuit. (not shown), a control signal transmitted by the charge pump power control unit 3002 is received by the charge pump power control circuit to generate a voltage required by the DC power supply circuit 3000. The overcurrent protection unit 3004 is used to prevent material or The process abnormality causes the DC current provided by the DC power supply unit 3000 to be abnormal, and the circuit designed by the metal wire glass bonding technology is inadvertently burned, causing the scraping of the panel glass 30. The voltage detection and feedback unit 3006 transmits a voltage. Detecting a feedback line 44 to detect voltage drop compensation caused by an excessively long line; the voltage detection feedback line is connected to the metal The line 42 is the farthest end 42a, so that the electric φ pressure detection feedback unit 3006 knows the voltage at the most distal end 42a, so the voltage detection feedback unit 3006 can know whether there is insufficient voltage because the line is too long. Referring to the third figure, a block diagram of the image signal conversion circuit 322 of the present invention, the image signal conversion circuit 322 mainly includes a bus switching receiver 3220 '-power regulator (power regulator) 3222, an encoder unit 3224, a synchronization controller 3226, and a transceiver unit 3228. The bus switching input unit 3220 is controlled by the input selection signal Sel and selects 1359615
LVDS介面影像輸入訊號Vin或是TTL介面影像輸入訊號 Vin。該功率調節器3222係電連接到該匯流排切換輸入單 元3220，以切換適合的操作電源。該編碼器單元3224係受 輸入選擇 Ϊ3選擇性地將影像輸入訊號Vin重 新編碼。 賢新編碼時’韓編元3224直LVDS interface image input signal Vin or TTL interface image input signal Vin. The power conditioner 3222 is electrically coupled to the bus switch input unit 3220 to switch the appropriate operating power source. The encoder unit 3224 selectively re-encodes the video input signal Vin by the input selection Ϊ3. When the new code is coded, 'Korean code 3224 straight
接輸出（bypass)該影像輸入訊號Vin。 該編碼器單元3224將TTL介面影像輸入訊號 、-----—--- --------------- ---- 成LVDS介面影像訊號，或是將LVDS介面影像輸入訊號 ___ _______ … 1TTL介面影像訊號。該收發器單元3228電 _ 一- - - - · —— — ·«- _ ___ 丽- 連接至該編碼器單元3224，以將該編碼器單元3224之輸出 送至該源極驅動電路302。由於重新編碼需要時間，編碼 器單元3224輸出與輸入會有時差，因此該同步控制單元 3226係電連接到該編碼器單元3224，以做時序同步。 在該源極驅動電路302中，該時序控制單元3020提供 源極驅動電路302所需要的時序訊號；該影像訊號接收單 φ 元3024接收由影像訊號轉換電路322所傳來之該些影像訊 號Vout。在影像訊號為LVDS差動訊號時，該終端阻抗 3026可以提供阻抗匹配，以降低雜訊。 在本發明實作時，於閘極驅動電路300及源極驅動電 路302之間原先有的串聯控制訊號304仍然被保留，串聯 控制訊號如垂直線開始掃描訊號（STV)、水平線開始掃描 訊號（STH)、閘極線路輸出致能訊號（OEV)、源極線路輸 出致能訊號（0EH)、影像上下反轉控制訊號（UD)及影像左 右反轉控制訊號（RL)。 由上述說明可以看出：本發明之具介面轉換功能之液 fUr驅動装置可以提供TTL介面八vds介面輪入訊 二轉換，因此可以節省同軸電魔及連接器之成本，並降低 需軟性電路板尺寸。同時也可達成多機種共用設計目 的，以減少設計開發時程與成本浪費。 =上所述，當知本發明已具有產業利用性、新賴性與 進步性，又本發明之構造亦未曾見於同類產品及公開使、 •用，完全符合發明專利申請要件，妥依專利法提主。 【圖式簡單說明】 Μ 第一圖是習知技術的TFT_LCD驅動架構。 第二圖係為本發明之具介面轉換功能之液 動裝置架構圖。 第三圖為本發明之影像訊號轉換電路之方塊圖。 【主要元件符號說明】 【習知】 軟性電路板2 閘極驅動器1〇 源極驅動器12訊號連接線14 電力連接線14a電力連接線l〇a 【本發明】 面板玻璃30 軟性電路板32 電力供應電路320 影像訊號轉換電路322 匯流排切換輸入單元3220 功率調節器3222 編碼器單元3224 12 同步控制單元3226 收發器單元3228 輸入選擇訊號Sel 影像輸入訊號Vin 閘極驅動電路300 串聯控制訊號304 源極驅動電路302 直流電源單元3000 電荷泵功率控制單元3002 過電流保護單元3004 電壓偵測回授單元3006 時序控制單元3020 終端阻抗3024 金屬訊號線40 影像訊號接收單元3022 第一金屬線段40a 第二金屬線段40b 1359615 金屬電源線42 最遠端42a 電壓偵測回授線44 13The image input signal Vin is bypassed. The encoder unit 3224 inputs the TTL interface image into the signal, ----------------------- into an LVDS interface image signal, or LVDS Interface image input signal ___ _______ ... 1TTL interface image signal. The transceiver unit 3228 is coupled to the encoder unit 3224 to deliver the output of the encoder unit 3224 to the source drive circuit 302. Since re-encoding takes time, the encoder unit 3224 output has a time difference from the input, so the synchronization control unit 3226 is electrically coupled to the encoder unit 3224 for timing synchronization. In the source driving circuit 302, the timing control unit 3020 provides a timing signal required by the source driving circuit 302. The image signal receiving unit φ 3024 receives the image signals Vout transmitted by the image signal converting circuit 322. . When the image signal is an LVDS differential signal, the terminal impedance 3026 can provide impedance matching to reduce noise. In the implementation of the present invention, the original series control signal 304 between the gate driving circuit 300 and the source driving circuit 302 is still retained, and the serial control signal such as the vertical line starts scanning signal (STV) and the horizontal line starts scanning the signal ( STH), gate line output enable signal (OEV), source line output enable signal (0EH), image up and down reverse control signal (UD) and image left and right inversion control signal (RL). It can be seen from the above description that the liquid fUr driving device with the interface conversion function of the present invention can provide the TTL interface eight vds interface wheel input two conversion, thereby saving the cost of the coaxial electric magic and the connector, and reducing the need for the flexible circuit board. size. At the same time, multi-machine sharing design can also be achieved to reduce design development time and cost waste. = As mentioned above, it is known that the present invention has industrial applicability, new reliance and progress, and the structure of the present invention has not been seen in similar products and is disclosed and used, and fully complies with the requirements of the invention patent application, and is in accordance with the patent law. Raise the Lord. [Simple description of the diagram] Μ The first figure is the TFT_LCD driver architecture of the prior art. The second figure is a schematic diagram of a hydraulic device having an interface conversion function of the present invention. The third figure is a block diagram of the image signal conversion circuit of the present invention. [Major component symbol description] [Practical] Flexible circuit board 2 Gate driver 1 〇 source driver 12 signal connection line 14 Power connection line 14a power connection line l〇a [Invention] Panel glass 30 Flexible circuit board 32 Power supply Circuit 320 image signal conversion circuit 322 bus switch input unit 3220 power regulator 3222 encoder unit 3224 12 synchronization control unit 3226 transceiver unit 3228 input selection signal Sel image input signal Vin gate drive circuit 300 series control signal 304 source drive Circuit 302 DC power supply unit 3000 Charge pump power control unit 3002 Over current protection unit 3004 Voltage detection feedback unit 3006 Timing control unit 3020 Terminal impedance 3024 Metal signal line 40 Image signal receiving unit 3022 First metal line segment 40a Second metal line segment 40b 1359615 metal power cord 42 most distal end 42a voltage detection feedback line 44 13