200834534 九、發明說明： 【發明所屬之技術領域】 士本發明係有關於一種液晶顯示裳置之驅動方法，且 ‘特別有關於謀求驅動電路所用之TFT元件的低電麼化與 小型化而進一步降低成本且實現在低消耗電力下驅動之 【先前技術】 在習知技術之主動轉型液晶顯示裝置中，於每個 旦素配置元件’並藉由開關元件之控制而驅動晝素。 主動㈣型液晶顯示I置係錢置液日$之2枚基板 中之-基板上形成同方向排列之複數條源極線及與源極 線直父的複數條_線。在源極線與閘極線之交叉部設 置旦素其中此晝素具有作為開關元件之ΤΗ、因應 畫素值而對液晶元件施加不同電壓的晝素電極、以及與 畫素電極並列連接之辅助電容。 與液晶元件並列連接之辅助電容係藉由使合成 變大而具有降低TFT之汲極_閘極間之寄生電容之影響的 作用，或具有降低在開關元件之關閉期間之漏電流 用。 關於液晶顯示裝置，至目前為止已有各式各樣之研 究技術，且亦有人提出在低消耗電力下驅動之技術專 許文獻1係揭示了藉由因應晝素電極電壓與共通電極電200834534 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a driving method of a liquid crystal display panel, and further relates to a low-power modification and miniaturization of a TFT element used for a driving circuit. [Prior Art] In the active-transition liquid crystal display device of the prior art, the element is disposed in each of the deniers and the pixel is driven by the control of the switching element. The active (four) type liquid crystal display I is placed on the two substrates of the liquid liquid storage day. The plurality of source lines arranged in the same direction and the plurality of lines _ line of the straight line of the source line are formed on the substrate. Providing a dendrite at the intersection of the source line and the gate line, wherein the element has a 昼 element as a switching element, a ruthenium electrode applying a different voltage to the liquid crystal element in response to a pixel value, and an auxiliary connection with the pixel electrode capacitance. The auxiliary capacitor connected in parallel with the liquid crystal element has a function of reducing the influence of the parasitic capacitance between the drain and the gate of the TFT by making the synthesis large, or has a function of reducing the leakage current during the off period of the switching element. Regarding the liquid crystal display device, various research techniques have been available so far, and it has also been proposed that the technical literature 1 which is driven under low power consumption discloses that the voltage of the electrode and the common electrode are reflected by the corresponding electrode.
壓間之關係而改變施加在輔助電容.之電壓， A 亚錯由縮小 〇773-A33113TWF;KB05001 5 200834534 _元件之源極電屢的振幅而降低驅動電路之電源電 遷，且謀求㈣耗電力化的技術。％路之电源電 的0圖文獻1所記載之液晶顯示裝置之驅動時 = 在圖3中’省略反沖偏移或由電流之鴻 晶顯干壯置^偏移的記載。在特許文獻1所記載之液 沒極電壓（畫素電極電壓)輸入源極信 號之正極則§號㈣，並使施加於辅助電容壓In the relationship between the pressures, the voltage applied to the auxiliary capacitor is changed. A sub-error is reduced by 〇773-A33113TWF; KB05001 5 200834534 _ the source of the component repeatedly reduces the power supply of the drive circuit, and seeks (4) power consumption Technology. In the case of the driving of the liquid crystal display device described in Document 1 of Fig. 3, the description of the offset offset or the shift of the current by the current is omitted. The positive electrode voltage (pixel voltage) input in the patent document 1 is input to the positive electrode of the source signal, and the § (4) is applied to the auxiliary capacitor.
Ji元件關閉後從低準位變化至高準位（咖叫。因此 容與辅助電容之間發生電荷再分配，而畫素電 幵AVpi。相反地，對汲極電壓輸人源極信號之負 極性信號電Μ，並在開關元件關閉後從高準位變化至低 準，（，脈tl2)。因此’在液晶電容與辅助電容之間發生 電何再分配’而畫素電麼僅下降Δνρ2。如此—來，由於 藉由施加於辅助電容之電壓可以控制源極電壓之故，因 此僅該些量即可縮小源極電壓之振幅。 [特許文獻1] 特開2000-81606號公報。 【發明内容】 、本發明為了追求低消耗電力化，係藉由特許文獻工 記載之方法而達到提供可以在低消耗電力下驅動液晶顯 示裝置之目的。 、 本發明之液晶顯示裝置之驅動方法係用於驅動具備 開關元件、晝素電極、以及使用.晝素電極作為其中一個 0773-Α33113TWF;KB05001 6 200834534 :極之辅助電容的液晶顯示裝置。在辅助電容之另 电極施加電壓’以從負極性信號電㈣換至正極性信 2|後使該晝素電極m低準位變化至高準位，且u 純信號電㈣換至貞極性信號電壓而開啟該 二。兀之别使該晝素電極之電壓由高準位變化至低準 性二，於為了從正極性信號電壓切換至負極 2 =[而開啟開_件之前，使施加於辅助電容之 f一個_電壓從高準位變化至低準位。如此一來， ，開啟開關兀件之前預先將施加於辅助電容之電塵 :=準位，因此，在開關元件之關閉期間，不需進 低之辅助電容的電壓控制， 為了防止來自畫素之電流茂漏，雖然必須 值以二j而將開關71件之閘極電壓控制在預定之閾 關-株：笔壓值，但是，根據本發明的話，由於在開 =之請期間不會使晝素電壓降低之故，因此可以 '心、閘極電Μ之振幅，且可以謀求低消耗電力化。 以及：::月ί:晶顯示裝置具備開關元件、晝素電極、 徵在於：為其中一個電極的辅助電容，其特 [,' 5电谷之另—個電極施加電壓，以於從負 切換至正極性信號電壓後使該書素電極之 立變？至高準位，且於為了從正極性信號電 辛m + ^性^號電Μ而開啟該開關元件之前使該晝 素电極之電壓由高準位變化至低準位。 0773-Α33113TWF;KB〇5〇〇l 7 200834534 、由於藉由此構成可與本發明之液晶顯示裝置之驅動 方法同樣地在開關元件之關閉期間不會使晝素電壓降低 之故，因此，可以縮小閘極電壓之振幅，謀求驅動電路 所用之TFT元件之低電壓化，因而可以降低成本而謀求 低消耗電力化。 根據本發明的話，於晝素電壓切換至負極性後之關 1 ’月門由於不胃使晝素電壓降低之故，因此，可以縮 小閘極電壓之振幅’並謀求低消耗電力化。 β 為讓本發明之上述和其他目的、特徵、和優點能更 明顯易懂，下文特舉出較佳實施例，並配合所附圖式， 作詳細說明如下： 【實施方式】 以下，參照本發明之實施形態之液晶顯示裝置圖面 而說明。 圖1係繪示本實施形態之液晶顯示裝置i之等效電 路圖’夜曰曰顯示1置i 一基板上具有同方向排列之複數 源極線10、及與源極線1〇直交之複數條間極線12。 在源極線H)與閘極線12之交叉部設置具有作為開關元 件14之TFT、對液晶元件16施加因應晝素值之電壓的 晝素電極18、以及與晝素18連接且並狀辅助電容 20的晝素。在夾置液晶之2枚基板中之他方基板一體地 設置共通電極22。 輔助電容20係與辅助電容線24連接。辅助電容線 0773-A33113TWF;KB05001 8 200834534 24係與連至同一閘極線12之複數個晝素共通。 圖2係繪示本實施形態之液晶顯示裝置1之驅動時 之信號波形圖。在圖2中，時脈tl以前係於晝素電極（汲 極電壓）18施加負極性信號電壓。於時脈u，一旦在丁 14之閘極施加較源極電壓預定之閾值v⑽以上之高閘極 電壓的居，則TFT 14開啟而源極線與晝素電極導 通，且〉及極電壓（也就是晝素電極18之電壓值）與源極 電壓相等。 於時脈t2，在使閘極電壓下降並關閉TFT 14之後， 於時脈t3，使輔助電容電壓從低準位變化至高準位。因 此，在液晶t容與辅助電容2〇之間發生電荷再分配，而 汲極電壓僅上昇ΔΥΡ。 接著，在將施加於液晶顯示裝置1之晝素電極18 的電壓切換至負極性信號電壓之前之時脈t4，使輔助電 容ί壓從高準位變化低準位。因此，在液晶電容與輔助 迅谷20之間發生電荷再分配，而晝素電極18之電壓 極電壓）僅下降AVp。接著，於時脈t5，一旦在μ ^閘極施加較源極電壓敎之_ ν⑽以上之高閉極電 壓的話’則TFT 14開啟而源極線1〇與晝素電極18導通， 且畫素電極18之電壓值與源極電壓相等。於時脈^ 閘極電壓降低，關閉TFT 14之開關。 為了防止來自液晶電容及辅助電容2〇之電产 二關閉期間之賴壓值必_^^^ 極电Μ及祕電錢定之閾值，_.以上之低電壓。...... 0773-Α33113TWF;KB05001 9 200834534 -本貫施形態之液晶顯示裝置係於使晝素電壓（没極 電壓）攸正極性信號電壓切換至負極性信號電壓之際，於 ! T F T ! 4施加閘極電壓前之時脈14，使輔助電容電壓從 间準位切換至低準位。雖然，於開啟、關閉tft Μ之間 極後之關閉期間旦使辅助電容電壓從高準位切換至 低準位的4則僅該些量即可使没極電壓降低（圖3所示之 =2)，但是，在本實施之形態中，由於在開啟TFT14之 前使辅助電容電壓從高準位切換至低準位之故，因此， 可以使負極性期間找極電Μ保持高的值。藉此，由於 可以使開關關閉時之閘極電壓保持在較習 下^ 緣故，故可以縮小閘極電壓之振幅。因此，可以降 低電源電壓，並可以降低消耗電力。 [產業上之利用可能性] 如以上所述，根據本發明的話，可以 :振幅’且具有能謀求低消乾電力化之效果。以主茲 陣型液晶顯不裝置之驅動方法而言，相當有用。 圖 【圖式簡單說明】 第1圖為本實施形態之液晶 顯示裝置之等效電 路 號波形圖 第3圖為習知之液晶顯示裝置之•丨 第2圖為本實施形態之液晶顯示裝置之縣時之信 驅動時之信號波形 0773-Α33113TWF;KB05001 10 200834534After the Ji component is turned off, it changes from a low level to a high level (Call is called. Therefore, charge redistribution occurs between the capacitor and the auxiliary capacitor, and the pixel is 幵AVpi. Conversely, the negative polarity of the source signal of the drain voltage is input. The signal is switched from high level to low level after the switching element is turned off, (, pulse t1). Therefore, 'there is redistribution between the liquid crystal capacitor and the auxiliary capacitor' and the pixel power is only decreased by Δνρ2. In this way, since the source voltage can be controlled by the voltage applied to the storage capacitor, the amplitude of the source voltage can be reduced only by the amount. [Patent Document 1] JP-A-2000-81606. In order to achieve low power consumption, the present invention achieves the object of driving a liquid crystal display device with low power consumption by the method described in the patent document. The driving method of the liquid crystal display device of the present invention is used for The drive is provided with a switching element, a halogen electrode, and a liquid crystal display device using a halogen electrode as one of the 0773-Α33113TWF; KB05001 6 200834534: a secondary auxiliary capacitor. The other electrode applies a voltage 'to change from the negative polarity signal (4) to the positive polarity signal 2|, and then the low level of the halogen element m is changed to a high level, and the pure signal (4) is switched to the polarity signal voltage to be turned on. The second one causes the voltage of the halogen electrode to change from a high level to a low level two, in order to switch from the positive polarity signal voltage to the negative electrode 2 = [while turning on the open device, the application is applied to the auxiliary capacitor f One _ voltage changes from high level to low level. In this way, before the switch element is turned on, the electric dust applied to the auxiliary capacitor is pre-positioned: = level, therefore, during the closing of the switching element, no need to enter Low voltage control of the auxiliary capacitor, in order to prevent the current leakage from the pixel, although the value of the gate of the switch 71 is controlled to be a predetermined threshold value by the value of the second value: the pen pressure value, but according to the present According to the invention, since the voltage of the halogen is not lowered during the turn-on period, the amplitude of the core and the gate electrode can be reduced, and the power consumption can be reduced. And::: ί: crystal display device With switching elements, halogen electrodes, For the auxiliary capacitor of one of the electrodes, a voltage is applied to the other electrode of the 5th electric valley to switch the negative electrode to the high level after switching from the negative to the positive signal voltage, and In order to switch the switching element from the positive polarity signal, the voltage of the halogen element is changed from a high level to a low level before turning on the switching element. 0773-Α33113TWF; KB〇5〇〇l 7 In the same manner as the driving method of the liquid crystal display device of the present invention, the voltage of the gate element is not lowered during the off period of the switching element, so that the amplitude of the gate voltage can be reduced and the driving circuit can be used. Since the TFT element is reduced in voltage, it is possible to reduce the cost and achieve low power consumption. According to the present invention, since the voltage of the halogen element is switched to the negative polarity, the moon gate lowers the voltage of the gate voltage, so that the amplitude of the gate voltage can be reduced and the power consumption can be reduced. The above and other objects, features, and advantages of the present invention will become more apparent from the aspects of the invention. The liquid crystal display device of the embodiment of the invention will be described. 1 is an equivalent circuit diagram of a liquid crystal display device i of the present embodiment. The night-time display 1 has a plurality of source lines 10 arranged in the same direction on a substrate, and a plurality of lines orthogonal to the source line 1 Interpolar line 12. A pixel electrode having a TFT as the switching element 14 , a voltage for applying a voltage corresponding to the liquid crystal element 16 to the liquid crystal element 16 , and a halogen electrode 18 connected to the halogen element 18 are provided at the intersection of the source line H) and the gate line 12 The halogen of the capacitor 20. The common electrode 22 is integrally provided on the other substrate of the two substrates sandwiching the liquid crystal. The auxiliary capacitor 20 is connected to the auxiliary capacitor line 24. Auxiliary Capacitor Line 0773-A33113TWF; KB05001 8 200834534 The 24 series is common to a plurality of elements connected to the same gate line 12. Fig. 2 is a signal waveform diagram showing the driving of the liquid crystal display device 1 of the embodiment. In Fig. 2, the clock tl is previously applied to the halogen electrode (thin voltage) 18 to apply a negative polarity signal voltage. At the clock u, once a high gate voltage of a predetermined threshold value v(10) or more is applied to the gate of the gate 14, the TFT 14 is turned on and the source line is turned on with the halogen electrode, and the voltage is That is, the voltage value of the halogen electrode 18 is equal to the source voltage. At time t2, after the gate voltage is lowered and the TFT 14 is turned off, the auxiliary capacitor voltage is changed from the low level to the high level at the clock t3. Therefore, charge redistribution occurs between the liquid crystal capacity and the storage capacitor 2, and the drain voltage rises only by ΔΥΡ. Next, at the timing t4 before the voltage applied to the halogen electrode 18 of the liquid crystal display device 1 is switched to the negative polarity signal voltage, the auxiliary capacitance is changed from the high level to the low level. Therefore, charge redistribution occurs between the liquid crystal capacitor and the auxiliary Xungu 20, and the voltage of the pixel electrode 18 decreases only AVp. Then, at the clock t5, once a high-close voltage of _ν(10) or more is applied to the μ gate, the TFT 14 is turned on and the source line 1 is turned on and the pixel electrode 18 is turned on, and the pixel is turned on. The voltage value of the electrode 18 is equal to the source voltage. At the clock, the gate voltage is lowered, and the switch of the TFT 14 is turned off. In order to prevent the voltage from the liquid crystal capacitor and the auxiliary capacitor 2 关闭 关闭 关闭 关闭 关闭 关闭 必 必 必 必 必 必 _ _ _ _ _ _ _ _ _ 阈 阈 阈 阈 阈 阈 阈 阈 阈 阈 秘 秘 秘 秘 秘 秘...... 0773-Α33113TWF; KB05001 9 200834534 - The liquid crystal display device of the present embodiment is used to switch the voltage of the positive polarity signal to the negative signal voltage at the pixel voltage (no-pole voltage). 4 The clock 14 before the gate voltage is applied to switch the auxiliary capacitor voltage from the inter-level to the low level. Although the auxiliary capacitor voltage is switched from the high level to the low level 4 during the turn-off period between the turn-on and turn-off of the tft 则, only the amount can reduce the gate voltage (shown in Figure 3 = 2) However, in the embodiment of the present embodiment, since the storage capacitor voltage is switched from the high level to the low level before the TFT 14 is turned on, the polarity of the polarity during the negative polarity period can be kept high. Thereby, since the gate voltage at the time of turning off the switch can be kept at a lower level, the amplitude of the gate voltage can be reduced. Therefore, the power supply voltage can be lowered and power consumption can be reduced. [Industrial Applicability] As described above, according to the present invention, it is possible to achieve an effect of reducing the power consumption by the amplitude. It is quite useful in the driving method of the main-line type liquid crystal display device. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a waveform diagram of an equivalent circuit number of a liquid crystal display device of the present embodiment. FIG. 3 is a view of a conventional liquid crystal display device. FIG. 2 is a county of a liquid crystal display device of the present embodiment. The signal waveform of the time letter drive is 0773-Α33113TWF; KB05001 10 200834534
【主要元件符號說明】 1〜液晶顯+裝置， 12〜閘極線； 16〜液晶元件， 20〜輔助電容； 24〜辅助電容線。 10〜源極線； 14〜TFT ; 18〜晝素電極； 22〜共通電極；[Main component symbol description] 1 ~ LCD display + device, 12 ~ gate line; 16 ~ liquid crystal element, 20 ~ auxiliary capacitor; 24 ~ auxiliary capacitor line. 10 ~ source line; 14 ~ TFT; 18 ~ halogen electrode; 22 ~ common electrode;
0773-A33113TWF;KB05001 110773-A33113TWF; KB05001 11