200903441 九、發明說明： 【發明所屬之技術領域】 本發明係關於液晶顯示裝置及其驅動裝置，特別是 關於特別是關於具有高顯示品質顯示之液晶顯示裝置 及其驅動裝置。 【先前技術】 第一圖係顯示典型之液晶顯示裝置1的結構示意 圖。 液晶顯示裝置1包含：液晶元件陣列2、閘極線驅 動電路7及源極匯流排驅動電路8，其中液晶元件陣列 2係由配置為矩陣形式的液晶元件（cell) 3所組成。 各液晶元件3係由缚膜電晶體4、液晶顯不元件5 以及輔助電容器6建構而成；其中液晶顯示元件5係連 接於薄膜電晶體4之汲極與接地間之一電容器，且其與 輔助電容器6並聯連接，薄膜電晶體4之閘極與源極係 分別連接至閘極線與源極匯流排。 此外，閘極線驅動電路7依序驅動各行的閘極線， 且各行液晶元件的各薄膜電晶體共同連接至各行閘極 線。再者，源極匯流排驅動電路8係提供一電壓信號至 共同連接於源極匯流排之各列液晶元件之各薄膜電晶 體之源極。 液晶顯示裝置中必有色調顯示，如一像素進行顯示 時，對應色調之資料碼係傳送至驅動裝置，並於驅動裝 置轉換成對應資料碼之電壓信號。電壓信號傳送至與薄 膜電晶體之汲極連接之像素之液晶元件的源極線，並傳 送一高電壓至閘極線以導通該薄膜電晶體之閘極，俾使 200903441 該電壓信號得以傳送至液晶元件，使透過率產生變化， 而獲得所希望之影像。 此時，資料碼與驅動電壓之關係並非線性，而具有 稱為γ曲線之特性。第二圖係習知技術中為了獲得對應 該γ曲線之電壓之構成示意圖。 圖中顯示資料對電壓之曲線關係，如圖所示，其係 可得256色調之電壓，而其對應的資料碼係0至255， 亦即可藉由8位元的資料傳送，從該資料獲得希望之電 壓。 首先，為取得電壓範圍，係從一參考電壓產生器10 中取出V0至V16等17種電壓，其中參考電壓產生器 10係由18個串聯連接於電源與接地間的電阻分割器所 構成，可藉由電阻分割的方式而取得17種電壓（V0至 V16)。利用資料之上階4位元以及4位元開關矩陣選擇 器20,可選擇出16個電壓範圍，輸出電壓範圍為乂。與 Vn+1 ;再利用資料之下階4位元以及4位元線性數位類 比轉換器（DAC)30可從選出之電壓範圍中16種電壓中 再選出任一個。在第二圖所示之實例中，係表示輸出之 電壓係落於電壓範圍V14-V15内，且其係分配於資料碼 223至239中的任何一個電壓。 第三圖係彩色液晶顯示裝置之驅動裝置的構成示 意方塊圖，該驅動裝置係施加源極電壓於源極匯流排 上；其中，與第二圖相同之部分係以相同的元件符號予 以表示。第三圖所示之驅動裝置係將電壓供給至兩列液 晶元件，其中各列液晶元件係包括3色組成部分（R、G、 B)。 此時，在提供施加至第η列中某個像素的紅色（R) 200903441 液晶元件之電壓資料時，與第二圖之說明相同地，從參 考電壓產生器10取出17種電壓值，再藉由4位元DA 轉換器的電壓選擇器20從17種電壓值的16種電壓範 圍中選擇輸出與電壓資料之上階4位元對應的兩個電壓 值Vn與Vn+l ;該電壓範圍的兩個電壓值Vn與Vn+l係施 加於像素列的源極匯流排，且被傳送至4位元下階位元 DA轉換器31，以獲得對應於資料值、且落於該電壓範 圍内的電壓。缓衝器41將該電壓穩定化；經穩定化之 電壓係由1對3之解多工器（demultiplexer)51施加至紅 色像素線之源極匯流排SB1R。另外，為了防止各源極 匯流排上因電壓變動大而造成顯示動作遲緩，而設有預 充電電路60。 藉由上述結構，在對某列源極匯流排施加電壓時， 首先進行預充電，以進行第一列之紅色列的準備與驅 動，其次進行第一列之綠色列的準備與驅動，並接著進 行第一列之藍色列的準備與驅動。如美國專利公開 2004-0174347 號所述。 但是，上述結構的缺點在於，在驅動鄰接列時，會 受到電麗變化的影響。 亦即，驅動第一列之紅色列時，係在其源極匯流排 形成電壓VI之狀態下驅動綠色列；當電壓上昇時，受 到電壓上昇之影響，紅色列亦產生電位上昇的問題，此 係因源極匯流排間之寄生電容耦合所致。相同地，鄰接 之源極匯流排彼此受到電壓變動之影響，將造成晝面影 像受損。 因此，若欲進行兩列單位的驅動時，就會採用下述 的方法。首先，在第一列之紅色列的驅動時，會先準備 200903441 進行第二列之紅色列之驅動；在第二列之紅色列驅動 中，也會先準備進行第一列之綠色列之驅動；如此地在 兩列中進行交互驅動。 然而，在這種兩列單位之驅動中，各列需要進行預 充電，因而需要設置預充電電路。故其耗電大，無法符 合減少耗電之要求。 【發明内容】 本發明之液晶顯示裝置之驅動裝置係藉由供給源 極匯流排一色調電壓以使液晶顯示元件驅動，該驅動裝 置包含： 參考電壓產生器，其產生一設定電壓，該設定電壓 係於該色調電壓之範圍内； 第一數位類比轉換器，其透過一資料碼之上階位元 而自參考電壓產生器擷取出表示電壓範圍的數值，其中 色調電壓對應於液晶顯示裝置之一液晶元件； 一第二及一第三數位類比轉換器，其配置為兩列， 當第二及一第三數位類比轉換器根據資料碼之下階位 元選擇第一數位類比轉換器所指明的電壓範圍内之一 詳細值時，第二與第三數位類比轉換器可選擇性輸出詳 細值；及 一解多工器，其將第二及第三數位類比轉換器之輸 出選擇性地連接至偶數列中之任何一列。 由於本發明不進行預充電，而是進行預驅動以使電 位上昇到接近原本須施加之值，因此源極匯流排之電壓 移位少，因而維持良好之顯示品質。 此外，由於不需要預充電電路，因此可減少該部分 200903441 之電=積可亦因電源ΐ單，所以可謀求降低成本。 之緩衝放大^使用比先$之DA轉換系統低速且低功率 明如P特舉較佳實施例’並配合所關式，作詳細說 【實施方式】 置的：：Ξ係if:月實施例之液晶顯示裝置之驅動裝 另外，太音'並/、第二圖所示之習知結構作比較說明。 用於^例㈣明&含3色組成之兩像素列的結構。 ;又仔電壓範圍之參考電壓產生器110與第三圖 之Hi相㈣構’其具有串聯連接於電源與接地間 私，分割器，以藉由電阻分割而得V0至V16 =17種電壓。該17種電愿藉由17個位元匯流排而傳 L至4位元DA轉換器之電壓選擇器12〇。 電壓選擇器120對應所傳送之資料的上階4位元輸 出顯示電壓範圍内之電壓值Vn與Vn+1。 %壓值Vn與γη+1傳送至4位元線性數位類比轉換 益（DAC)131及4位元線性數位類比轉換器（DAC)132。 DAC131及132對應資料之下階4位元輸出指定之 電壓範圍内16種電壓的其中任何一個，且此些輸出係 分別藉由負反饋緩衝器141，142而予以穩定化。另外， 將2對6解多工器（demultiplexer)152連接於兩個輸入侧 與六個輸出侧間，藉由此2對6解多工器152的作用， 可於兩列中3色組成共6條源極匯流排SB1R，SB1G， SB1B，SB2R, SB2G, SB2B間任意選擇，並對其施加輸出 電壓。 此外，不同於第三圖所示之處’在本實施例中係對 200903441 4位元線性數位類比轉換器（DAC)131及132輸入預驅動 信號PRD，且缓衝器141，142亦與第三圖中之緩衝器41， 42不同，本實施例係為負反饋連接運算放大器。在本實 施例中，更配置了 1個2對6解多工器，而非第三圖所 示之兩個1對3解多工器不同，且此例中也無需配置預 充電電路。 第五圖係顯示本發明中4位元線性數位類比轉換器 (DAC)131與缓衝器141連接的電路圖。 在所示之電路圖中，以點鏈線包圍之範圍係表示習 知的4位元線性數位類比轉換器（DAC) 31，其具有五個 並聯電容器，其中這些電容器的一端係共同接地，且電 容係以C作為單位電容，分別為1C，1C, 2C, 4C, 8C。這 些電容器之另一端各分別連接至開關SW10，SW11, SW12, SW13, SW14,用以使電壓選擇器120所輸出之兩 個電壓值於乂。與Vn+1間進行切換；且此些電容器也分 別連接至開關 SW20, SW21，SW22, SW23, SW24，並藉 由預驅動信號PRD而進行控制。開關SW20, SW21, SW22, SW23，SW24的另一端則共同連接於缓衝器 141。此外，亦設有一開關SW25，以藉由預驅動信號 PRD之控制而將電壓Vn直接輸入緩衝器，其中開關 SW25 係進行與開關 SW20, SW21, SW22, SW23, SW24 相反之動作。另外，該開關SW25亦可將電壓Vn+1供給 至緩衝器，如第五圖中虛線所示。 第六圖繪示依照第四圖及第五圖中電路作動之時 序示意圖。在此係以兩列3色組成部分共6列為例，將 源極電壓供給至源極匯流排作為例子進行說明。 現說明以1為例、而在弟四圖之6條源極匯流排 11 200903441 SB1R，SB1G，SB1B，SB2R, SB2G, SB2B 上供給源極電壓 之情況。 第六圖中顯示交互地進行[A][B]所示之兩個動作； 亦即，在最初期間進行第一列之設定與預驅動，其次以 資料碼指定之電壓進行驅動，同時對第二列進行設定與 預驅動，在接續期間中進行第二列之驅動時，即進行第 三列之設定與預驅動；以下同樣地，在兩列間交互地重 複進行設定與預驅動時程與驅動時程。 電壓選擇器120依據資料碼之上階位元而從第四圖 所示之參考電壓產生器10取出的17種電壓值中，選擇 顯示電壓範圍之兩個電壓Vn與Vn+i，並將其供給至兩 個4位元線性數位類比轉換器（dac)13i及m。 ^這些4位元線性數位類比轉換器（DAC)131及132 係如第五圖所示，將具有單位電容lc，lc，2C，4c, 8c =個電容器分別連接於電壓Vn或^，且開關swi〇, 11，SW12, SW13, SW14依據資料碼之下階4位元切 之下”施：ί源極匯流排之驅動電壓係依據資料碼 swL Ϊ料設定。具體而言，第五圖之開關S獅,BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device and a driving device thereof, and more particularly to a liquid crystal display device having a high display quality display and a driving device therefor. [Prior Art] The first figure shows a schematic structural view of a typical liquid crystal display device 1. The liquid crystal display device 1 includes a liquid crystal element array 2, a gate line driving circuit 7, and a source bus line driving circuit 8, wherein the liquid crystal element array 2 is composed of a liquid crystal cell 3 arranged in a matrix form. Each of the liquid crystal elements 3 is constructed by a bonding film transistor 4, a liquid crystal display element 5, and an auxiliary capacitor 6; wherein the liquid crystal display element 5 is connected to a capacitor between the drain of the thin film transistor 4 and the ground, and The auxiliary capacitors 6 are connected in parallel, and the gate and source of the thin film transistor 4 are connected to the gate line and the source bus bar, respectively. Further, the gate line driving circuit 7 sequentially drives the gate lines of the respective rows, and the thin film transistors of the respective liquid crystal elements are commonly connected to the respective gate lines. Furthermore, the source bus bar driving circuit 8 supplies a voltage signal to the sources of the respective thin film transistors of the liquid crystal cells of the respective columns connected in common to the source bus bar. The liquid crystal display device must have a hue display. When a pixel is displayed, the data code corresponding to the hue is transmitted to the driving device, and is converted into a voltage signal corresponding to the data code by the driving device. The voltage signal is transmitted to the source line of the liquid crystal element of the pixel connected to the drain of the thin film transistor, and a high voltage is transmitted to the gate line to turn on the gate of the thin film transistor, so that the voltage signal of 200903441 can be transmitted to The liquid crystal element changes the transmittance to obtain a desired image. At this time, the relationship between the data code and the driving voltage is nonlinear, and has a characteristic called a gamma curve. The second figure is a schematic diagram showing the structure of a voltage corresponding to the gamma curve in the prior art. The figure shows the relationship between the data and the voltage. As shown in the figure, it can obtain 256-tone voltage, and its corresponding data code is 0 to 255, which can also be transmitted by 8-bit data. Get the voltage you want. First, in order to obtain the voltage range, 17 voltages, such as V0 to V16, are taken out from a reference voltage generator 10, wherein the reference voltage generator 10 is composed of 18 resistor dividers connected in series between the power source and the ground. Seventeen voltages (V0 to V16) are obtained by resistor division. Using the upper 4 bits of the data and the 4-bit switch matrix selector 20, 16 voltage ranges can be selected with an output voltage range of 乂. And Vn+1; reuse data lower order 4-bit and 4-bit linear digital analog converter (DAC) 30 can select one of 16 voltages in the selected voltage range. In the example shown in the second figure, it is indicated that the output voltage falls within the voltage range V14-V15 and is assigned to any of the data codes 223 to 239. The third drawing is a schematic block diagram of a driving device for a color liquid crystal display device which applies a source voltage to a source bus bar; wherein the same portions as those of the second figure are denoted by the same reference numerals. The driving device shown in the third figure supplies voltage to two columns of liquid crystal elements, wherein each column of liquid crystal elements includes three color components (R, G, B). At this time, when the voltage data of the red (R) 200903441 liquid crystal element applied to a certain pixel in the nth column is supplied, as in the description of the second figure, 17 kinds of voltage values are taken out from the reference voltage generator 10, and then borrowed. The voltage selector 20 of the 4-bit DA converter selects and outputs two voltage values Vn and Vn+1 corresponding to the upper 4 bits of the voltage data from 16 voltage ranges of 17 voltage values; Two voltage values Vn and Vn+1 are applied to the source busbar of the pixel column, and are transmitted to the 4-bit lower-order bit DA converter 31 to obtain a value corresponding to the data value and fall within the voltage range. Voltage. The buffer 41 stabilizes the voltage; the stabilized voltage is applied to the source busbar SB1R of the red pixel line by a 1-to-3 demultiplexer 51. Further, a precharge circuit 60 is provided in order to prevent the display operation from being delayed due to a large voltage fluctuation in each of the source bus bars. With the above configuration, when a voltage is applied to a column of source busbars, pre-charging is first performed to prepare and drive the red column of the first column, and then the green column of the first column is prepared and driven, and then Prepare and drive the blue column of the first column. As described in U.S. Patent Publication No. 2004-0174347. However, the above structure has a drawback in that it is affected by the change in the electric galvanism when the adjacent column is driven. That is, when the red column of the first column is driven, the green column is driven in the state in which the source busbar forms the voltage VI. When the voltage rises, the red column also has a potential increase due to the voltage rise. It is caused by the parasitic capacitance coupling between the source busbars. Similarly, the adjacent source busbars are affected by voltage variations and will cause damage to the shadow image. Therefore, if you want to drive two columns of units, the following method will be used. First, when the red column of the first column is driven, 200903441 is first prepared for the red column of the second column; in the red column driver of the second column, the green column of the first column is also prepared for driving. So interactively driven in two columns. However, in the driving of such two columns of units, each column needs to be precharged, and thus a precharge circuit needs to be provided. Therefore, it consumes a lot of power and cannot meet the requirements of reducing power consumption. SUMMARY OF THE INVENTION A driving device for a liquid crystal display device of the present invention drives a liquid crystal display element by supplying a source voltage to a color tone, the driving device comprising: a reference voltage generator that generates a set voltage, the set voltage Corresponding to the range of the tone voltage; the first digital analog converter extracts a value representing a voltage range from a reference voltage generator through a bit position of a data code, wherein the tone voltage corresponds to one of the liquid crystal display devices a liquid crystal element; a second and a third digital analog converter configured in two columns, when the second and third digital analog converters select the first digital analog converter according to the lower order bits of the data code The second and third digital analog converters can selectively output detailed values when one of the voltage ranges is detailed; and a demultiplexer that selectively connects the outputs of the second and third digital analog converters to Any of the even columns. Since the present invention does not perform precharging, it is pre-driven to raise the potential to a value close to that originally required, so that the voltage shift of the source bus is small, thereby maintaining good display quality. In addition, since the pre-charging circuit is not required, the power supply of the 200903441 can be reduced, and the power supply can be reduced, so that the cost can be reduced. The buffer amplification is lower than the first DA conversion system and the low power is as good as P. The preferred embodiment 'and the closed type is described in detail. [Embodiment]::Ξ: month embodiment The driving structure of the liquid crystal display device is additionally described in the above description of the conventional structure shown in the second figure. It is used for the structure of two pixel columns of three colors. The voltage range reference voltage generator 110 and the Hi-phase (four) structure of the third figure have a series connection between the power source and the ground, and the divider is divided by resistors to obtain V0 to V16 = 17 voltages. The 17 types of electricity are transmitted to the voltage selector 12 of the 4-bit DA converter by a 17-bit bus. The voltage selector 120 outputs voltage values Vn and Vn+1 within the display voltage range corresponding to the upper 4 bits of the transmitted data. The % voltage values Vn and γη+1 are transferred to a 4-bit linear digital analog conversion (DAC) 131 and a 4-bit linear digital analog converter (DAC) 132. The DACs 131 and 132 correspond to any of the 16 voltages within the specified voltage range of the lower 4-bit output of the data, and the outputs are stabilized by the negative feedback buffers 141, 142, respectively. In addition, a 2-pair 6 demultiplexer 152 is connected between the two input sides and the six output sides, whereby the two pairs of 6 demultiplexers 152 can form a total of three colors in two columns. 6 source busbars SB1R, SB1G, SB1B, SB2R, SB2G, SB2B are arbitrarily selected and applied with an output voltage. In addition, unlike the third figure, in the present embodiment, the pre-drive signal PRD is input to the 200903441 4-bit linear digital-to-digital converters (DAC) 131 and 132, and the buffers 141, 142 are also the same. The buffers 41, 42 in the three figures are different, and this embodiment is a negative feedback connected operational amplifier. In this embodiment, a two-to-six-demultiplexer is configured instead of the two 1-to-3 demultiplexers shown in the third figure, and there is no need to configure a precharge circuit in this example. The fifth diagram shows a circuit diagram of the 4-bit linear digital analog converter (DAC) 131 connected to the buffer 141 in the present invention. In the circuit diagram shown, the range enclosed by dotted lines represents a conventional 4-bit linear digital analog converter (DAC) 31 having five parallel capacitors, one of which is commonly grounded at one end and has a capacitance Take C as the unit capacitance, which is 1C, 1C, 2C, 4C, 8C. The other ends of these capacitors are respectively connected to switches SW10, SW11, SW12, SW13, SW14 for causing the voltage values output by the voltage selector 120 to be at 乂. Switching is performed with Vn+1; and these capacitors are also connected to switches SW20, SW21, SW22, SW23, SW24, respectively, and controlled by the pre-drive signal PRD. The other ends of the switches SW20, SW21, SW22, SW23, and SW24 are commonly connected to the buffer 141. In addition, a switch SW25 is also provided to directly input the voltage Vn into the buffer by the control of the pre-drive signal PRD, wherein the switch SW25 performs the opposite operation to the switches SW20, SW21, SW22, SW23, SW24. In addition, the switch SW25 can also supply the voltage Vn+1 to the buffer as indicated by the broken line in the fifth figure. Figure 6 is a timing diagram showing the operation of the circuit in accordance with the fourth and fifth figures. In this case, a total of six columns of three color and three color components are taken as an example, and the source voltage is supplied to the source bus bar as an example. The case where the source voltage is supplied to the six source bus bars 11 200903441 SB1R, SB1G, SB1B, SB2R, SB2G, and SB2B in the four diagrams of the four figures will now be described. The sixth figure shows the two actions shown in [A][B] interactively; that is, the setting and pre-driving of the first column are performed during the initial period, and the voltage specified by the data code is driven, and the The second column is set and pre-driven. When the second column is driven during the connection period, the third column is set and pre-driven; in the same manner, the setting and pre-driving time intervals are alternately repeated between the two columns. Drive the time course. The voltage selector 120 selects two voltages Vn and Vn+i of the display voltage range from among the 17 voltage values taken out from the reference voltage generator 10 shown in FIG. 4 according to the upper order bits of the data code, and It is supplied to two 4-bit linear digital analog converters (dac) 13i and m. ^ These 4-bit linear digital analog converters (DACs) 131 and 132 are shown in the fifth figure, and have unit capacitors lc, lc, 2C, 4c, 8c = capacitors connected to voltage Vn or ^, respectively, and switches Swi〇, 11, SW12, SW13, SW14 are cut according to the lower 4 bits of the data code. “Shi: The driving voltage of the source bus is set according to the data code swL. Specifically, the fifth figure Switch S lion,
Pb 4位-的-二:23, SW24之開放，並依據資料碼之下 制開關swiG，swi1,swi2,讓3, 電容™，-， 容器充電。也就是今Λ η或Vn+1，藉以將此等電 0000時，仍可產生最二開關SW10為例’即使資料為 電容生最低電壓，且之電壓仍可供給至 另外’預驅動係藉由關_關S糖而將電壓v 12 200903441 二=之情況為V2)供給至緩_。因此，可同時進行 没疋與預驅動，預驅動之結果為 至自電壓選擇器⑶輪出之值，如ί六歹圖 的電壓波形圖所示。 在其次之期間，因為關閉開關SW20, SW21，SW22 SW23，SW24而貯存於4位元線性數位類比轉換器 (DAC)131之各電容n的電壓，會作為由資料碼指定之 驅動電壓而供給至緩衝器放大器141。而後，解多工哭 152將緩衝放大器141之輸出供給至六行中之一行，= 作為驅動電壓（本例之情況為VI )。 此外，相鄰之4位元線性數位類比轉換器（DAc)132 延遲了第六圖所示之丨個時序才開始進行同樣之動作， 如[B]所示。亦即，在第一列進行驅動期間，同時進行第 一列之没疋與預驅動；而在後續期間輸出驅動電壓時， 解多工器152則切換須供給驅動電壓之列數，而供給驅 動電壓V2。Pb 4 bit - the - 2: 23, SW24 is open, and according to the data code below the switch swiG, swi1, swi2, let 3, capacitor TM, -, the container is charged. That is, Λ η or Vn +1, by which the second switch SW10 can still be generated as an example. Even if the data is the lowest voltage of the capacitor, the voltage can be supplied to another pre-driver. Turn off _ off S sugar and supply voltage v 12 200903441 to the case of V2) to _. Therefore, the pre-drive and the pre-drive can be performed at the same time, and the result of the pre-drive is the value that is output from the voltage selector (3), as shown in the voltage waveform diagram of the 歹 歹 diagram. In the second period, the voltages of the capacitors n stored in the 4-bit linear digital analog converter (DAC) 131 by turning off the switches SW20, SW21, SW22, SW23, and SW24 are supplied to the drive voltage specified by the data code. Buffer amplifier 141. Then, the multiplexed cry 152 supplies the output of the buffer amplifier 141 to one of the six rows, = as the driving voltage (in the case of this example, VI). In addition, the adjacent 4-bit linear digital analog converter (DAc) 132 delays the timing shown in Figure 6 to begin the same action, as shown in [B]. That is, during the driving of the first column, the first column is not simultaneously and pre-driven; and when the driving voltage is output during the subsequent period, the demultiplexer 152 switches the number of columns to be supplied with the driving voltage, and supplies the driving. Voltage V2.
再者’於進行第二列之驅動時，[A]係進行第三列之 設定及預驅動。以下進行同樣之動作。 如此，本發明中，由於在設定期間中，同時進行供 給顯示電壓範圍之電壓的預驅動’因此並不需要設置預 充電電路。因而，可減少電路面積’又因電源簡單，更 可降低成本。 此外’因預驅動會使源極匯流排電位上昇至接近原 本驅動電壓之值，而使鄰接像素之驅動造成的電壓變動 (第六圖中V2—Vin造成之AVc’）也會減少，故視覺 效果的損害也較少。再者，熟悉本技術之業者因了解本 發明並不限於以上之實施例，進行之改良例等包含於本 13 200903441 發明之範圍内。 例如適用本發明之列數，可適用於兩列及六列以外 之任何偶數列。 此外，此種液晶顯示裝置適合作為第七圖所示之攜 帶型電話裝置100之顯示裝置1，不過並不限於攜帶型 電話裝置，還可適用於數位相機、個人數位助理（PDA)、 筆記型電腦、桌上型電腦、電視、車用顯示器、可攜式 DVD播放器之任何一種電子裝置。 【圖式簡單說明】 第一圖係顯示典型之液晶顯示裝置1的結構示意 圖。 第二圖係習知技術中為了獲得對應該γ曲線之電壓 之構成示意圖。 第三圖係彩色液晶顯示裝置之驅動裝置的構成示 意方塊圖。 第四圖係本發明實施例之液晶顯示裝置之驅動裝 置的方塊圖。 第五圖係顯示本發明中4位元線性數位類比轉換器 與缓衝器連接的電路圖。 第六圖繪示依照第四圖及第五圖中電路作動之時 序示意圖。 第七圖係顯示適用本發明之液晶顯示裝置的攜帶 型電話裝置之示意圖。 【主要元件符號說明】 1 液晶顯示裝置 2 液晶元件陣列 14 200903441 3 液晶兀件 142 負反饋緩衝器 4 薄膜電晶體 152 解多工器 5 液晶顯不兀件 223〜239資料碼 6 辅助電容 PRD 預驅動信號 7 閘極線驅動電路 SB1B 源極匯流排 8 源極匯流排驅動電路 SB1G 源極匯流排 10 參考電壓產生器 SB1R 源極匯流排 20 電壓選擇器 SB2B 源極匯流排 30 4位元線性數位類比 SB2G 源極匯流排 轉換器（DAC) SB2R 源極匯流排 31 4位元下階位元DA SW10 開關 轉換器 SW11 開關 41 緩衝器 SW12 開關 42 緩衝器 SW13 開關 51 1對3解多工器 SW14 開關 60 預先充電電路 SW20 開關 110 參考電壓產生器 SW21 開關 120 電壓選擇器 SW22 開關 131 4位元線性數位類比 SW23 開關 轉換器（DAC) SW24 開關 132 4位元線性數位類比 SW25 開關 轉換器（DAC) vn 電壓 141 負反饋缓衝器 Vn+i 電壓 15Furthermore, when driving the second column, [A] performs the setting and pre-driving of the third column. The same action is performed below. As described above, in the present invention, since the pre-drive for supplying the voltage of the display voltage range is simultaneously performed during the set period, it is not necessary to provide the precharge circuit. Therefore, the circuit area can be reduced, and the power can be reduced, and the cost can be reduced. In addition, due to the pre-drive, the source busbar potential will rise to a value close to the original driving voltage, and the voltage fluctuation caused by the driving of adjacent pixels (AVc' caused by V2-Vin in the sixth figure) will also decrease, so the vision The damage of the effect is also less. Further, those skilled in the art will understand that the present invention is not limited to the above embodiments, and modifications and the like are included in the scope of the invention. For example, the number of columns to which the present invention is applied can be applied to any even column other than two columns and six columns. Further, such a liquid crystal display device is suitable as the display device 1 of the portable telephone device 100 shown in FIG. 7, but is not limited to a portable telephone device, and is also applicable to a digital camera, a personal digital assistant (PDA), and a notebook type. Any kind of electronic device such as a computer, a desktop computer, a television, a car display, or a portable DVD player. BRIEF DESCRIPTION OF THE DRAWINGS The first figure shows a schematic configuration of a typical liquid crystal display device 1. The second figure is a schematic diagram showing the structure of the voltage corresponding to the gamma curve in the prior art. The third drawing is a block diagram showing the constitution of the driving device of the color liquid crystal display device. The fourth drawing is a block diagram of a driving device of a liquid crystal display device of an embodiment of the present invention. Fig. 5 is a circuit diagram showing the connection of a 4-bit linear digital analog converter to a buffer in the present invention. Figure 6 is a timing diagram showing the operation of the circuit in accordance with the fourth and fifth figures. Fig. 7 is a view showing a portable telephone device to which the liquid crystal display device of the present invention is applied. [Main component symbol description] 1 Liquid crystal display device 2 Liquid crystal cell array 14 200903441 3 Liquid crystal device 142 Negative feedback buffer 4 Thin film transistor 152 Demultiplexer 5 Liquid crystal display 223~239 data code 6 Auxiliary capacitor PRD pre Drive signal 7 gate line driver circuit SB1B source busbar 8 source busbar driver circuit SB1G source busbar 10 reference voltage generator SB1R source busbar 20 voltage selector SB2B source busbar 30 4-bit linear digit Analog SB2G Source Bus Converter (DAC) SB2R Source Bus 31 4 Bit Lower Level Bit DA SW10 Switching Converter SW11 Switch 41 Buffer SW12 Switch 42 Buffer SW13 Switch 51 1 to 3 Solution Multiplexer SW14 Switch 60 Pre-charge circuit SW20 Switch 110 Reference voltage generator SW21 Switch 120 Voltage selector SW22 Switch 131 4-bit linear digital analog SW23 Switching converter (DAC) SW24 Switch 132 4-bit linear digital analog SW25 Switching converter (DAC) Vn voltage 141 negative feedback buffer Vn+i voltage 15