TWI689905B - Driving circuit and driving method - Google Patents

Driving circuit and driving method Download PDF

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TWI689905B
TWI689905B TW107141948A TW107141948A TWI689905B TW I689905 B TWI689905 B TW I689905B TW 107141948 A TW107141948 A TW 107141948A TW 107141948 A TW107141948 A TW 107141948A TW I689905 B TWI689905 B TW I689905B
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voltage
switch
compensation element
signal
line
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TW107141948A
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Chinese (zh)
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TW202020836A (en
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盧文哲
劉育榮
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友達光電股份有限公司
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Priority to CN201910491983.6A priority patent/CN110164395B/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only

Abstract

A driving circuit including first switch, compensating device connecting to the first switch, first scan line connecting to the gate of the first switch, and second scan line connecting to the compensating device is provided. The compensating device is adapted to storage voltage signal from the second scan line. A signal line is formed of the first switch and the compensating device. When the first scan line is transmitting a first voltage to the gate of the first switch, so as to open the first switch, the second scan line transmit a second voltage to the compensating device at the same time, so as to enable the conduction of the signal line, and the polarity of the first voltage and the second voltage are opposite. A driving method is also provided.

Description

驅動電路及驅動方法 Drive circuit and drive method

本發明有關一種驅動電路以及驅動方法；特別是有關於一種輸入訊號或輸出訊號的傳遞的驅動電路以及驅動方法。 The invention relates to a driving circuit and a driving method; in particular, it relates to a driving circuit and a driving method for transmission of an input signal or an output signal.

隨著影像顯示技術的進步與發展，傳統的陰極射線顯示器(Cathode Ray Tube Display,CRT display)已逐漸被平板顯示器(Flat panel display)取代。平板顯示器一般常見的是由薄膜電晶體驅動的液晶顯示器(Thin-Film Transistor Liquid Crystal Display,TFT-LCD)，其具有降低功耗、體積並提高解析度等優點。 With the advancement and development of image display technology, the traditional cathode ray display (Cathode Ray Tube Display, CRT display) has been gradually replaced by a flat panel display. A flat panel display is generally a thin-film transistor-driven liquid crystal display (Thin-Film Transistor Liquid Crystal Display, TFT-LCD), which has the advantages of reducing power consumption, volume, and improving resolution.

然而，液晶顯示裝置發展至今，仍有一些待改善的問題，其中之一產生在TFT中的寄生電容。TFT在源極、汲極都會產生寄生電容，其各自連接到資料線和掃描線，會成為資料線的驅動負載和掃描線的驅動負載。隨著液晶顯示技術的發展，資料傳輸速度的需求也隨之提高，對於上述這些負載的容忍度也相對降低。同時，訊號線路會因為顯示面的大小、解析度的提升不斷增加其長度以及密度，寄生電容的驅動負載問題也會提升。因此，如何解決寄生電容所帶來的問題仍是目前所要解決的目標之一。 However, since the development of liquid crystal display devices, there are still some problems to be improved, one of which is the generation of parasitic capacitance in the TFT. TFTs will generate parasitic capacitances at the source and the drain, which are connected to the data line and the scanning line, and will become the driving load of the data line and the driving load of the scanning line. With the development of liquid crystal display technology, the demand for data transmission speed has also increased, and the tolerance for these loads has also been relatively reduced. At the same time, the signal line will continue to increase its length and density due to the increase in the size and resolution of the display surface, and the driving load problem of parasitic capacitance will also increase. Therefore, how to solve the problem caused by the parasitic capacitance is still one of the goals to be solved at present.

本發明提供一種驅動電路，其可以在傳遞訊號後維持適當的電位。 The invention provides a driving circuit which can maintain an appropriate potential after transmitting a signal.

本發明的驅動電路包括至少一第一開關、連接第一開關的補償元件、連接至第一開關的閘極的第一掃描線以及連接至補償元件的第二掃描線，其中補償元件適於儲存來自第二掃描線的電壓訊號，且第一開關以及補償元件形成一訊號線路。當第一掃描線傳遞一第一電壓至第一開關的閘極以開啟第一開關時，第二掃描線同時傳遞一第二電壓至補償元件以導通訊號線路，且第一電壓與第二電壓彼此電性相反。 The driving circuit of the present invention includes at least a first switch, a compensation element connected to the first switch, a first scan line connected to the gate of the first switch, and a second scan line connected to the compensation element, wherein the compensation element is suitable for storage The voltage signal from the second scan line, and the first switch and the compensation element form a signal line. When the first scan line transmits a first voltage to the gate of the first switch to turn on the first switch, the second scan line simultaneously transmits a second voltage to the compensation element to conduct the signal line, and the first voltage and the second voltage They are electrically opposite to each other.

本發明提供一種驅動方法，其用以驅動包含至少一第一開關以及補償元件的驅動電路，且第一開關以及補償元件形成一訊號線路。此驅動方法包括：提供一第一電壓至第一開關的閘極以開啟第一開關；提供一第二電壓至補償元件以導通訊號線路；以及以訊號線路傳遞一資料訊號或一感應訊號；其中第一電壓與第二電壓彼此電性相反。 The invention provides a driving method for driving a driving circuit including at least a first switch and a compensation element, and the first switch and the compensation element form a signal line. The driving method includes: providing a first voltage to the gate of the first switch to open the first switch; providing a second voltage to the compensation element to conduct the communication signal line; and transmitting a data signal or an inductive signal through the signal line; The first voltage and the second voltage are electrically opposite to each other.

由上述可知，藉由補償元件和第一開關所形成的訊號線路以及補償元件和第一開關各自利用第一電壓以及第二電壓導通訊號線路的方式，訊號線路可以在傳遞一訊號後維持適當的電位。 As can be seen from the above, the signal line formed by the compensation element and the first switch and the way in which the compensation element and the first switch each utilize the first voltage and the second voltage to conduct the signal line, the signal line can maintain an appropriate after transmitting a signal Potential.

CLK1,CLK1B,G1,G2,G3,Gc1‧‧‧掃描線 CLK1, CLK1B, G1, G2, G3, Gc1‧‧‧ scan line

CLC,Cs‧‧‧電容 C LC ,Cs‧‧‧Capacitance

in1,in2,in3,in4,in5,in6,D1,D2‧‧‧資料線 in1,in2,in3,in4,in5,in6,D1,D2‧‧‧ data cable

SCLK1,SCLK2,SCLK3,SCLK4,SCLK5‧‧‧第一電壓 SCLK1, SCLK2, SCLK3, SCLK4, SCLK5 ‧‧‧ first voltage

SCLKB1,SCLKB2,SCLKB3,SCLKB4,SCLKB5‧‧‧第二電壓 SCLKB1, SCLKB2, SCLKB3, SCLKB4, SCLKB5 second voltage

Sin1,Sin2,Sin3‧‧‧資料訊號 Sin1, Sin2, Sin3 ‧‧‧ data signal

Sp1,Sp2,Sp3,Sout1,Sout2,Sout3,Sout4,Sout5‧‧‧電極訊號 Sp1, Sp2, Sp3, Sout1, Sout2, Sout3, Sout4, Sout5 ‧‧‧ electrode signal

100,200‧‧‧顯示面板 100,200‧‧‧Display panel

110,210,310‧‧‧驅動電路 110,210,310 ‧‧‧ drive circuit

111,211,311‧‧‧訊號線路 111,211,311‧‧‧Signal line

112,212,312A-312C‧‧‧第一開關 112,212,312A-312C‧‧‧First switch

112Cgs,113Cgd,113Cgs‧‧‧寄生電容 112Cgs, 113Cgd, 113Cgs ‧‧‧ parasitic capacitance

112d,113d,212d‧‧‧汲極 112d, 113d, 212d

112g,113g,212g,312Ag,312Bg,312Cg‧‧‧閘極 112g, 113g, 212g, 312Ag, 312Bg, 312Cg ‧‧‧ gate

112s,113s,212s‧‧‧源極 112s,113s,212s‧‧‧Source

113,213,313‧‧‧補償元件 113,213,313‧‧‧Compensation element

120,220‧‧‧畫素電極 120,220 ‧‧‧ pixel electrode

300‧‧‧感應模組 300‧‧‧Induction module

320A-320C‧‧‧感應電極 320A-320C‧‧‧Induction electrode

圖1是本發明第一實施例中顯示面板的示意圖；圖2是本發明第一實施例中顯示面板的電路圖； 圖3是本發明一實施例中顯示驅動訊號和現有顯示驅動訊號的比較示意圖；圖4,5是本發明一實施例中驅動訊號和現有顯示驅動訊號的比較模擬訊號示意圖；圖6是本發明第二實施例中顯示面板的電路圖；圖7是本發明第三實施例中感應模組的示意圖；圖8是本發明第三實施例中感應模組的電路圖。 1 is a schematic diagram of a display panel in the first embodiment of the present invention; FIG. 2 is a circuit diagram of the display panel in the first embodiment of the present invention; 3 is a schematic diagram of a comparison of a display driving signal and an existing display driving signal in an embodiment of the present invention; FIGS. 4 and 5 are schematic diagrams of a comparative analog signal of a driving signal and an existing display driving signal in an embodiment of the present invention; FIG. 6 is the present invention The circuit diagram of the display panel in the second embodiment; FIG. 7 is a schematic diagram of the sensing module in the third embodiment of the present invention; FIG. 8 is a circuit diagram of the sensing module in the third embodiment of the present invention.

本發明所提出的驅動電路可以應用至需要藉由例如是薄膜電晶體(Thin Film Transistor,TFT)來控制訊號的傳遞之電子裝置，電子裝置例如是顯示裝置或是觸控裝置，本發明並不限於這些應用裝置的類型。舉例而言，本發明所提出的驅動電路可以用在輸出訊號，在顯示模組中用來驅動顯示電極，用以控制傳遞至顯示電極的訊號之線路。本發明所提出的驅動電路也可以用在輸入訊號，在觸控模組或是觸控顯示模組中用來驅動感應電極，用以控制傳遞至感應電極的訊號之線路。 The driving circuit proposed by the present invention can be applied to electronic devices that need to control the transmission of signals by, for example, thin film transistors (TFTs). The electronic devices are, for example, display devices or touch devices. Limited to the type of these application devices. For example, the driving circuit proposed by the present invention can be used to output signals, used to drive display electrodes in a display module, and used to control the circuit of signals transmitted to the display electrodes. The driving circuit proposed by the present invention can also be used for inputting signals, used to drive sensing electrodes in a touch module or a touch display module, and used to control the circuit of signals transmitted to the sensing electrodes.

應當理解，儘管術語「第一」、「第二」等在本文中可以用於描述各種元件、部件或部分，但是這些元件、部件或部分不應受這些術語限制。這些術語僅用於將一個元件、部件或部分區分開。因此，下面討論的「第一元件」、「第一部件」、「第一開關」、「第一掃描線」或「第一部分」也可以被稱為「第二元件」、「第二部件」、「第二開關」、「第二掃描線」或「第二部分」而不脫離本文的教導。 It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, components or parts, these elements, components or parts should not be limited by these terms. These terms are only used to distinguish one element, component or section. Therefore, the "first component", "first component", "first switch", "first scan line", or "first part" discussed below may also be referred to as "second component", "second component" , "Second switch", "second scan line" or "second part" without departing from the teaching of this article.

以下將分別以數個實施例說明本發明所提出的驅動電路在 應用至畫素電極以及感應電極時的詳細技術特徵。 The following will describe the driving circuit proposed by the present invention in several embodiments respectively. Detailed technical features when applied to pixel electrodes and sensing electrodes.

請參照圖1所繪示的顯示面板的實施例示意圖。本發明的第一實施例中，顯示面板100包括驅動電路110和畫素電極120，本實施例驅動電路110示例性應用至液晶顯示面板100，但本發明不限於此應用領域。本實施例的驅動電路110例如是用以形成訊號線路111，所述訊號線路111用以連接並傳遞顯示訊號給畫素電極120，畫素電極120用以夾置液晶並施加電場以翻轉液晶來提供光閥功能。 Please refer to the schematic diagram of the embodiment of the display panel shown in FIG. 1. In the first embodiment of the present invention, the display panel 100 includes a driving circuit 110 and a pixel electrode 120. The driving circuit 110 of this embodiment is exemplarily applied to the liquid crystal display panel 100, but the present invention is not limited to this application field. The driving circuit 110 of this embodiment is, for example, used to form a signal line 111 for connecting and transmitting a display signal to the pixel electrode 120. The pixel electrode 120 is used to sandwich the liquid crystal and apply an electric field to invert the liquid crystal. Provide light valve function.

本實施例的驅動電路110包括連接於訊號線路111的補償元件113。請參照圖1，驅動電路110包括第一開關112以及補償元件113，上述訊號線路111由互相連接的第一開關112以及補償元件113形成，且畫素電極120透過第一開關112以及補償元件113接受顯示訊號。 The driving circuit 110 of this embodiment includes a compensation element 113 connected to the signal line 111. 1, the driving circuit 110 includes a first switch 112 and a compensation element 113. The signal line 111 is formed by the first switch 112 and the compensation element 113 connected to each other, and the pixel electrode 120 passes through the first switch 112 and the compensation element 113 Accept the display signal.

本實施例的第一開關112以及補償元件113用以控制顯示訊號至畫素電極120的傳遞。具體而言，請參照圖1，在顯示模組100中，本實施例的驅動電路110包括第一掃描線CLK1以及第二掃描線CLK1B，其中第一掃描線CLK1連接至第一開關112；第二掃描線CLK1B連接至補償元件113。第一掃描線CLK1用以傳遞一第一電壓至第一開關112；第二掃描線CLK1B用以傳遞一第二電壓至補償元件113，上述第一電壓和第二電壓分別適於開通第一開關112和補償元件113中用以形成訊號線路111的部分，使來自資料線in1,in2的顯示訊號得以傳遞。舉例而言，當第一電壓經第一掃描線CLK1傳遞至第一開關112；第二電壓經第二掃描線CLK1B傳遞至補償元件113時，來自資料線in1的顯示訊號可以經由訊號線路111傳遞至畫素電極120。以下將進一步舉例說明本實施例中上述各元件的特徵。 The first switch 112 and the compensation element 113 of this embodiment are used to control the transmission of the display signal to the pixel electrode 120. Specifically, referring to FIG. 1, in the display module 100, the driving circuit 110 of this embodiment includes a first scan line CLK1 and a second scan line CLK1B, wherein the first scan line CLK1 is connected to the first switch 112; The second scan line CLK1B is connected to the compensation element 113. The first scan line CLK1 is used to transfer a first voltage to the first switch 112; the second scan line CLK1B is used to transfer a second voltage to the compensation element 113, and the first voltage and the second voltage are respectively suitable for turning on the first switch The portion of 112 and the compensation element 113 used to form the signal line 111 enables the display signals from the data lines in1, in2 to be transmitted. For example, when the first voltage is transferred to the first switch 112 via the first scan line CLK1; the second voltage is transferred to the compensation element 113 via the second scan line CLK1B, the display signal from the data line in1 can be transferred via the signal line 111 To the pixel electrode 120. The following will further illustrate the characteristics of the above-mentioned elements in this embodiment.

請參照圖2繪示的顯示面板100的實施例電路圖。具體而言，在本實施例的顯示面板100中，第一開關112例如是一電晶體，而第一掃描線CLK1連接至第一開關112的閘極112g。在本實施例中，第一開關112的源極112s連接至資料線in1；第一開關112的汲極112d連接至補償元件113，第一掃描線CLK1所傳遞的第一電壓可以在第一開關112中形成通道，使第一開關112的源極112s和汲極112s形成導通的狀態，顯示訊號得以經第一開關往補償元件113傳遞。 Please refer to the circuit diagram of the embodiment of the display panel 100 shown in FIG. 2. Specifically, in the display panel 100 of this embodiment, the first switch 112 is, for example, a transistor, and the first scan line CLK1 is connected to the gate 112g of the first switch 112. In this embodiment, the source 112s of the first switch 112 is connected to the data line in1; the drain 112d of the first switch 112 is connected to the compensation element 113, and the first voltage transmitted by the first scan line CLK1 may be at the first switch A channel is formed in 112, so that the source 112s and the drain 112s of the first switch 112 are turned on, and the display signal can be transmitted to the compensation element 113 through the first switch.

本實施例的補償元件113例如是另一電晶體，且補償元件113的源極113S連接至第一開關112的汲極112d；補償元件113的汲極113d連接至畫素電極120。補償元件113的閘極113g連接至第二掃描線CLKB1，當補償元件113接收到來自第二掃描線CLKB1的第二電壓時，補償元件113以會形成通道使源極113s和汲極113d導通。因此，第一電壓和第二電壓可以分別導通第一開關112和補償元件113使訊號線路111可以傳遞顯示訊號至畫素電極120。 The compensation element 113 of this embodiment is, for example, another transistor, and the source 113S of the compensation element 113 is connected to the drain 112 d of the first switch 112; the drain 113 d of the compensation element 113 is connected to the pixel electrode 120. The gate 113g of the compensation element 113 is connected to the second scan line CLKB1. When the compensation element 113 receives the second voltage from the second scan line CLKB1, the compensation element 113 forms a channel to turn on the source 113s and the drain 113d. Therefore, the first voltage and the second voltage can respectively turn on the first switch 112 and the compensation element 113 so that the signal line 111 can transmit the display signal to the pixel electrode 120.

同時，在本實施例中，上述傳遞至補償元件130的第二電壓的極性與傳遞至第一開關112的第一電壓的極性相反，因此當第一電壓和第二電壓各自在第一開關112和補償元件113形成寄生電容時，在資料線in1或第一掃描線CLK1產生改變電壓時，補償元件113的寄生電容和第一開關112的寄生電容是以極性相反的電壓形成，因此可以補償因第一開關112的寄生電容在畫素電極120影響的電壓變化量，進而使顯示訊號的傳遞可以維持良好的效率和品質。 Meanwhile, in this embodiment, the polarity of the second voltage transferred to the compensation element 130 is opposite to the polarity of the first voltage transferred to the first switch 112, so when the first voltage and the second voltage are respectively at the first switch 112 When forming a parasitic capacitance with the compensation element 113, when the data line in1 or the first scan line CLK1 generates a changing voltage, the parasitic capacitance of the compensation element 113 and the parasitic capacitance of the first switch 112 are formed with voltages of opposite polarities, so the compensation The parasitic capacitance of the first switch 112 affects the amount of voltage change of the pixel electrode 120, and thus the transmission of the display signal can maintain good efficiency and quality.

舉例而言，本實施例的第一電壓例如是以一第一掃描訊號 形成，其包括開啟訊號以及關閉訊號，當第一開關112接收到開啟訊號後，畫素電極120所形成的電容CLC會藉由來自資料線路in1的顯示訊號充電。當第一開關112接收到關閉訊號、閘極電壓正在變化時，第一開關112因寄生電容所產生的訊號延遲會被補償元件113的寄生電容所產生的訊號延遲補償。因兩者極性相反，不會在畫素電極120所形成的電容CLC產生大量的電壓減損，減少掃描線上寄生電阻、電容所產生的延遲效應，讓電容CLC的充電電壓維持在適當的範圍。 For example, the first voltage in this embodiment is formed by a first scan signal, which includes an on signal and an off signal. When the first switch 112 receives the on signal, the capacitor C LC formed by the pixel electrode 120 It will be charged by the display signal from the data line in1. When the first switch 112 receives the off signal and the gate voltage is changing, the signal delay caused by the parasitic capacitance of the first switch 112 will be compensated by the signal delay generated by the parasitic capacitance of the compensation element 113. Because the polarities of the two are opposite, a large amount of voltage loss will not be generated in the capacitor C LC formed by the pixel electrode 120, reducing the delay effect caused by the parasitic resistance and capacitance on the scanning line, so that the charging voltage of the capacitor C LC is maintained in an appropriate range .

在本發明第一實施例的顯示面板100中，驅動電路110的補償元件113的電容與第一開關112的寄生電容匹配，因此可以有效補償第一開關112因電容耦合造成的影響。進一步而言，閘極112g和汲極112d之間所形成的寄生電容112Cgd的絕對值會與補償元件113在閘極113g和源極113s之間以及閘極113g含汲極113d之間形成的寄生電容113Cgd,113Cgs實質上相等，因此在第一開關112接收關閉訊號時，補償元件113可以降低畫素電極120的電位變化量，甚至維持畫素電極120的電位。 In the display panel 100 of the first embodiment of the present invention, the capacitance of the compensation element 113 of the driving circuit 110 matches the parasitic capacitance of the first switch 112, so the effect of the first switch 112 due to capacitive coupling can be effectively compensated. Further, the absolute value of the parasitic capacitance 112Cgd formed between the gate 112g and the drain 112d will be parasitic with the compensation element 113 formed between the gate 113g and the source 113s and between the gate 113g and the drain 113d The capacitors 113Cgd and 113Cgs are substantially equal, so when the first switch 112 receives the turn-off signal, the compensation element 113 can reduce the amount of change in the potential of the pixel electrode 120, and even maintain the potential of the pixel electrode 120.

具體而言，在本實施例所提出的驅動電路110中的第一開關112和補償元件113都各自是一電晶體，較佳為薄膜電晶體，其中第一開關112包括一第一通道；補償元件113的電晶體包括一第二通道。上述第一通道和第二通道滿足：(W1/L1)：(W2/L2)=2：1；其中W1,L1分別為該第一通道的寬度以及長度；W2,L2分別為該第二通道的寬度以及長度。上述第一通道和第二通道較佳由半導體形成，且因為滿足上述的關係，因此112Cgs=113Cgd+113Cgs。 Specifically, the first switch 112 and the compensation element 113 in the driving circuit 110 proposed in this embodiment are each a transistor, preferably a thin film transistor, wherein the first switch 112 includes a first channel; compensation The transistor of the element 113 includes a second channel. The first channel and the second channel satisfy: (W1/L1): (W2/L2)=2:1; where W1 and L1 are the width and length of the first channel; W2 and L2 are the second channel respectively Width and length. The first channel and the second channel are preferably formed of semiconductors, and because the above relationship is satisfied, 112Cgs=113Cgd+113Cgs.

舉例而言，當提供至第一開關112的第一電壓形成+20V(伏特)的電壓差；提供至補償元件113的第二電壓形成-20V的電壓差，由於：△Q1=-20 x 112Cgs；△Q2=+20 x(113Cgd+113Cgs)；其中△Q1為第一開關的寄生電容的電荷量；△Q2為補償元件的寄生電容的電荷量，且112Cgs=113Cgd+113Cgs，因此兩個電荷量總和實質上為零，而電位變化量也因此實質上為零。因此，畫素電容CLC的畫素電極120的電位變化量實質上也可以降低或甚至為零。 For example, when the first voltage supplied to the first switch 112 forms a voltage difference of +20V (volts); the second voltage supplied to the compensation element 113 forms a voltage difference of -20V, because: △Q1=-20 x 112Cgs △Q2=+20 x (113Cgd+113Cgs); where △Q1 is the charge amount of the parasitic capacitance of the first switch; △Q2 is the charge amount of the parasitic capacitance of the compensation element, and 112Cgs=113Cgd+113Cgs, so the two charges The sum of the amounts is substantially zero, and the amount of potential change is therefore substantially zero. Therefore, the amount of potential change of the pixel electrode 120 of the pixel capacitor C LC can also be substantially reduced or even zero.

圖3為本發明一實施例中訊號和現有顯示驅動訊號的比較示意圖，其應用至類似於上述實施例的顯示面板以及現有的顯示面板。請參照圖3，Sin1為提供至資料線的資料訊號；SCLK1,SCLK2,SCLK3為提供至不同第一掃描線的第一電壓；SCLKB1,SCLKB2,SCLKB3為提供至不同第二掃描線的第二電壓；Sp1,Sp2,Sp3為不同畫素電極的電位。在這些畫素電極的訊號Sp1,Sp2,Sp3中，實線為包含補償元件的訊號，虛線為不包含補償元件的訊號。由於在沒有補償元件時，畫素電極的訊號Sp1,Sp2,Sp3會被第一電壓SCLK1,SCLK2,SCLK3在關閉時的壓降的影響。由圖3可知，補償元件可以有效補償畫素電極的電位，進而維持良好的顯示效果。 FIG. 3 is a comparison diagram of a signal and an existing display driving signal in an embodiment of the present invention, which is applied to a display panel similar to the above embodiment and an existing display panel. Please refer to FIG. 3, Sin1 is the data signal provided to the data line; SCLK1, SCLK2, SCLK3 are the first voltage provided to different first scan lines; SCLKB1, SCLKB2, SCLKB3 are the second voltage provided to different second scan lines ; Sp1, Sp2, Sp3 are the potentials of different pixel electrodes. In the signals Sp1, Sp2, and Sp3 of these pixel electrodes, the solid line is the signal including the compensation element, and the dotted line is the signal not including the compensation element. When there is no compensation element, the signal Sp1, Sp2, Sp3 of the pixel electrode will be affected by the voltage drop of the first voltages SCLK1, SCLK2, SCLK3 when they are turned off. It can be seen from FIG. 3 that the compensation element can effectively compensate the potential of the pixel electrode, thereby maintaining a good display effect.

圖4為本發明一實施例的驅動電路與現有顯示驅動電路的訊號模擬比較圖。請參照圖6，Sin2為提供至資料線的資料訊號；SCLK4為提供至第一掃描線的第一電壓；SCLKB4為提供至第二掃描線的第二電壓；Sout1為現有顯示驅動電路的顯示電極的模擬訊號；Sout2以及Sout3為本發明實施例的驅動電路所連接的顯示電極的模擬訊號，其中Sout2為以電容作 為補償元件的實施方式，Sout3為以電晶體作為補償元件的實施方式。以電容作為補償元件的實施方式將在下文中以實施例進一步說明。由圖4可以看出，在沒有對應接受第二電壓的補償元件時，顯示電極的訊號Sout1會因為第一掃描線的第一電壓SCLK4下降而受影響。 FIG. 4 is a signal simulation comparison diagram of a driving circuit and an existing display driving circuit according to an embodiment of the invention. 6, Sin2 is the data signal provided to the data line; SCLK4 is the first voltage provided to the first scan line; SCLKB4 is the second voltage provided to the second scan line; Sout1 is the display electrode of the existing display drive circuit Analog signal; Sout2 and Sout3 are analog signals of the display electrode connected to the driving circuit of the embodiment of the present invention, where Sout2 is a capacitor As an embodiment of a compensation element, Sout3 is an embodiment using a transistor as a compensation element. The implementation using the capacitor as the compensation element will be further described in the following examples. As can be seen from FIG. 4, when there is no compensation element corresponding to receiving the second voltage, the signal Sout1 of the display electrode will be affected because the first voltage SCLK4 of the first scan line drops.

舉例而言，資料訊號Sin2例如提供1伏特的訊號，第一掃描線則提供自-10伏特至+10伏特的開啟訊號。參照畫素電極的訊號Sout1，當開啟訊號開啟第一開關並讓畫素電極充能至1伏特後(參照圖4中時間點t1)，第一電壓訊號SCLK4中的關閉訊號也會影響畫素電極訊號Sout1，使之降至-8.91伏特(參照圖4中時間點t2)，進而影響顯示效果。相對地，當補償元件存在於訊號線路且同步接收第二電壓訊號SLKB4時，顯示電極的訊號Sout2,Sout3可以維持在1伏特。由上述可知，補償元件可以提供良好的畫素電壓維持功能。 For example, the data signal Sin2 provides a signal of 1 volt, for example, and the first scan line provides an open signal from -10 volts to +10 volts. Referring to the signal Sout1 of the pixel electrode, when the turn-on signal turns on the first switch and charges the pixel electrode to 1 volt (see time t1 in FIG. 4), the turn-off signal in the first voltage signal SCLK4 will also affect the pixel The electrode signal Sout1 is reduced to -8.91 volts (refer to time t2 in FIG. 4), which further affects the display effect. In contrast, when the compensation element is present in the signal line and receives the second voltage signal SLKB4 synchronously, the signals Sout2 and Sout3 of the display electrode can be maintained at 1 volt. From the above, the compensation element can provide a good pixel voltage maintenance function.

圖5為本發明一實施例中驅動電路訊號與現有顯示驅動電路的模擬比較示意圖，其中Sin3為提供至資料線的資料訊號；SCLK5為提供至第一掃描線的第一電壓；SCLKB5為提供至第二掃描線的第二電壓；Sout4為有補償元件的畫素電極的電位；Sout5為沒有補償元件的畫素電極的電位。需要說明的是，此處資料訊號Sin3為逐漸提升的訊號，在時間點t3時資料訊號Sin3為1.4伏特；第一電壓自-10提升至10來開啟第一開關；第二電壓則提供至補償元件並以相反的壓差(-20伏特)充能。當第一開關關閉後，在時間點t4時，本實施例的驅動電路所連接的顯示電極仍維持在1.4伏特，而現有的顯示驅動電路則落至-8.98伏特。由圖5可知，補償元件實質上可以讓畫素電極維持電位。 5 is a schematic diagram of a simulation comparison of a driving circuit signal and an existing display driving circuit in an embodiment of the present invention, where Sin3 is a data signal provided to a data line; SCLK5 is a first voltage provided to a first scan line; SCLKB5 is provided to The second voltage of the second scan line; Sout4 is the potential of the pixel electrode with the compensation element; Sout5 is the potential of the pixel electrode without the compensation element. It should be noted that the data signal Sin3 here is a gradually increasing signal, and the data signal Sin3 is 1.4 volts at time t3; the first voltage is increased from -10 to 10 to turn on the first switch; the second voltage is provided to the compensation The element is charged with the opposite pressure difference (-20 volts). After the first switch is turned off, at time t4, the display electrode connected to the driving circuit of this embodiment is still maintained at 1.4 volts, while the existing display driving circuit falls to -8.98 volts. As can be seen from FIG. 5, the compensation element can substantially allow the pixel electrode to maintain the potential.

在本發明所提出的驅動電路中，補償元件並不限於上述以電晶體實施，在其他實施例中更可以以電容或其他可以儲存電位的電子元件來實施。請參照圖6，在本發明的第二實施例中，顯示面板200包括驅動電路210以及畫素電極220。在驅動電路210中，形成訊號線路211的第一開關212以及補償元件213彼此連接，串聯於資料線路in3和畫素電極220之間。與上述第一實施例的不同之處在於，本實施例的補償元件213例如是電容元件，其電容值實質上與第一開關212的寄生電容212Cgd相同。由上述實施例可知，藉由第一掃描線CLK2在提供第一電壓至第一開關212時，第二掃描線CLK2B提供第二電壓至補償元件213，其中第一電壓和第二電壓彼此極性不同，因此補償元件213可以補償畫素電極220在第一開關212關閉時所造成的壓降。 In the driving circuit proposed by the present invention, the compensation element is not limited to the above implementation with transistors, and in other embodiments, it can be implemented with capacitors or other electronic components that can store potentials. Please refer to FIG. 6. In the second embodiment of the present invention, the display panel 200 includes a driving circuit 210 and a pixel electrode 220. In the driving circuit 210, the first switch 212 and the compensation element 213 forming the signal line 211 are connected to each other, and are connected in series between the data line in3 and the pixel electrode 220. The difference from the first embodiment described above is that the compensation element 213 of this embodiment is, for example, a capacitance element, and its capacitance value is substantially the same as the parasitic capacitance 212Cgd of the first switch 212. As can be seen from the above embodiment, when the first scan line CLK2 provides the first voltage to the first switch 212, the second scan line CLK2B provides the second voltage to the compensation element 213, wherein the first voltage and the second voltage have different polarities from each other Therefore, the compensation element 213 can compensate the voltage drop caused by the pixel electrode 220 when the first switch 212 is turned off.

本發明所提出的驅動電路並不限於使用於上述的畫素電極，還可以應用於感應電極。感應電極可以提供例如是電容觸控功能，但本發明不限於此。以下將以另一實施例說明。請參照圖6所繪示感應模組的示意圖。請參照圖7，在本發明的第三實施例中，感應模組300的驅動電路310的訊號線路311驅動感應電極320A、320B以及320C，其用以傳遞感應訊號至感應電極320A-320C。 The driving circuit proposed by the present invention is not limited to the pixel electrodes described above, but can also be applied to the sensing electrodes. The sensing electrode may provide, for example, a capacitive touch function, but the invention is not limited thereto. In the following, another embodiment will be described. Please refer to the schematic diagram of the sensing module shown in FIG. 6. Referring to FIG. 7, in the third embodiment of the present invention, the signal circuit 311 of the driving circuit 310 of the sensing module 300 drives the sensing electrodes 320A, 320B, and 320C, which are used to transmit the sensing signals to the sensing electrodes 320A-320C.

請參照圖7，在本實施例中，訊號線路311是由彼此連接的補償元件313和多個第一開關312A-312C為例。此處圖7以三個第一開關以及一個補償元件的訊號線路為例，其並非用以限定本發明。具體而言，本實施例的第一開關312A由第一掃描線G1所傳遞的第一電壓開通；第一開關312B由第一掃描線G2所傳遞的第一電壓開通；第一開關312C由第一掃 描線G3所傳遞的第一電壓開通；第二掃描線Gc1用以在上述的任一第一開關312A-312C接收到第一電壓時傳遞第二電壓以開通補償元件313並使訊號線路311得以傳遞感應訊號。在本實施例中，藉由第一掃描線G1-G3依序開啟第一開關312A-312C，並搭配第二掃描線Gc1開啟補償元件313，資料線D1可以依序傳遞的感應訊號至感應電極320A,320B或320C，且補償元件313可以使感應電極320A、320B或320C接收到感應訊號時維持電位。 Please refer to FIG. 7. In this embodiment, the signal line 311 is composed of a compensation element 313 and a plurality of first switches 312A-312C connected to each other as an example. Here, FIG. 7 takes the signal lines of three first switches and one compensation element as examples, which are not intended to limit the present invention. Specifically, the first switch 312A of this embodiment is turned on by the first voltage transmitted by the first scan line G1; the first switch 312B is turned on by the first voltage transmitted by the first scan line G2; the first switch 312C is turned by Sweep The first voltage transmitted by the trace line G3 is turned on; the second scan line Gc1 is used to transmit the second voltage to turn on the compensation element 313 and enable the signal line 311 to be transmitted when any of the first switches 312A-312C receives the first voltage Induction signal. In this embodiment, the first switches 312A-312C are sequentially turned on by the first scan lines G1-G3, and the compensation element 313 is turned on with the second scan line Gc1, and the data line D1 can sequentially transmit the sensing signals to the sensing electrodes 320A, 320B or 320C, and the compensation element 313 can maintain the potential when the sensing electrode 320A, 320B or 320C receives the sensing signal.

具體而言，請參照圖8，在感應模組300中的驅動電路310中，本實施例的訊號線路311中這些第一開關312A、312B是以電晶體實施；補償元件313是以另一電晶體實施。以訊號線路311而言，第一掃描線G1、G2分別輪流用以傳遞第一電壓至第一開關312A的閘極312Ag、第一開關312B的閘極312Bg以及第一開關312C的閘極312Cg，而第二掃描線Gc1在每次上述的第一掃描線G1、G2傳遞第一電壓時傳遞第二電壓至補償元件313的閘極313g，使訊號線路311得以導通並傳遞感應訊號至感應電極，其中第一電壓和第二電壓的極性彼此相反。因此，在感應電極320A接受感應訊號並儲存於感應電容Cs時，補償元件313可以藉由相反極性的電容來分次補償感應電極320A、320B的電位，以使感應電極320A、320B維持良好的電位。關於補償元件313如何補償訊號線路311所連接之感應電極320A之電位可以參考上述的第一實施例，此處就不再贅述。 Specifically, referring to FIG. 8, in the driving circuit 310 of the sensing module 300, the first switches 312A and 312B in the signal circuit 311 of this embodiment are implemented by transistors; the compensation element 313 is implemented by another Crystal implementation. As far as the signal line 311 is concerned, the first scan lines G1 and G2 take turns to transmit the first voltage to the gate 312Ag of the first switch 312A, the gate 312Bg of the first switch 312B and the gate 312Cg of the first switch 312C, The second scanning line Gc1 transmits the second voltage to the gate 313g of the compensating element 313 each time the first scanning line G1, G2 transmits the first voltage, so that the signal line 311 is turned on and transmits the sensing signal to the sensing electrode, The polarities of the first voltage and the second voltage are opposite to each other. Therefore, when the sensing electrode 320A receives the sensing signal and stores it in the sensing capacitor Cs, the compensation element 313 can compensate the potential of the sensing electrode 320A, 320B in stages by the capacitor of the opposite polarity, so that the sensing electrode 320A, 320B maintains a good potential . Regarding how the compensation element 313 compensates the potential of the sensing electrode 320A connected to the signal line 311, reference may be made to the first embodiment described above, which will not be repeated here.

綜上所述，本發明所提供的驅動電路可以在傳遞一訊號給一畫素電極或感應電極後藉由補償元件維持訊號，藉以提供良好的顯示效果或感應效果。 In summary, the driving circuit provided by the present invention can maintain a signal by a compensation element after transmitting a signal to a pixel electrode or a sensing electrode, thereby providing a good display effect or sensing effect.

CLK1,CLK1B‧‧‧掃描線 CLK1, CLK1B ‧‧‧ scan line

CLC‧‧‧電容 C LC ‧‧‧Capacitance

in1,in2,in3‧‧‧資料線 in1,in2,in3‧‧‧Data cable

100‧‧‧顯示面板 100‧‧‧Display panel

110‧‧‧驅動電路 110‧‧‧Drive circuit

111‧‧‧訊號線路 111‧‧‧Signal line

112‧‧‧第一開關 112‧‧‧ First switch

113‧‧‧補償元件 113‧‧‧Compensation element

120‧‧‧畫素電極 120‧‧‧Pixel electrode

Claims (11)

一種驅動電路，包括：至少一第一開關，各該第一開關包括一第一電晶體；一第一掃描線，連接至該第一開關的一閘極；一補償元件，包括一第二電晶體並連接至該第一開關；以及一第二掃描線，連接至該補償元件，該補償元件適於儲存來自該第二掃描線的電壓訊號；其中該第一電晶體的汲極、源極以及該第二電晶體的汲極、源極形成一訊號線路，且該第二掃描線連接至該第二電晶體的閘極；當該第一掃描線傳遞一第一電壓至該第一開關的該閘極以開啟該第一開關時，該第二掃描線同時傳遞一第二電壓至該補償元件以導通該訊號線路，且該第一電壓與該第二電壓彼此電性相反。 A driving circuit includes: at least one first switch, each of the first switches includes a first transistor; a first scan line connected to a gate of the first switch; a compensation element, including a second circuit The crystal is connected to the first switch; and a second scan line is connected to the compensation element, the compensation element is adapted to store the voltage signal from the second scan line; wherein the drain and source of the first transistor And the drain and source of the second transistor form a signal line, and the second scan line is connected to the gate of the second transistor; when the first scan line transmits a first voltage to the first switch When the gate is turned on to open the first switch, the second scan line simultaneously transmits a second voltage to the compensation element to turn on the signal line, and the first voltage and the second voltage are electrically opposite to each other. 如申請專利範圍第1項所述的驅動電路，其中該第一電晶體包括一第一通道，該第二電晶體包括一第二通道，且該第一通道以及該第二通道滿足：(W1/L1)：(W2/L2)=2：1；其中W1,L1分別為該第一通道的寬度以及長度；W2,L2分別為該第二通道的寬度以及長度。 The driving circuit as described in item 1 of the patent application scope, wherein the first transistor includes a first channel, the second transistor includes a second channel, and the first channel and the second channel satisfy: (W1 /L1): (W2/L2)=2:1; where W1, L1 are the width and length of the first channel; W2, L2 are the width and length of the second channel, respectively. 如申請專利範圍第1項所述的驅動電路，其中該補償元件包括一補償電容，其中該補償電容的電容值實質上與該第一開關的寄生電容值相同。 The driving circuit as described in item 1 of the patent application range, wherein the compensation element includes a compensation capacitor, wherein the capacitance value of the compensation capacitor is substantially the same as the parasitic capacitance value of the first switch. 如申請專利範圍第1項所述的驅動電路，其中該驅動電路用以驅動一畫素電極，該訊號線路連接於一資料線以及該畫素電極之間，當該第一開關以及該補償元件各自接受該第一電壓以及該第二電壓時，該資料線依序 經由該第一開關以及該補償元件所導通的該訊號線路傳遞一資料訊號至該畫素電極。 The driving circuit as described in item 1 of the patent application scope, wherein the driving circuit is used to drive a pixel electrode, the signal line is connected between a data line and the pixel electrode, when the first switch and the compensation element When each receives the first voltage and the second voltage, the data lines are in order A data signal is transmitted to the pixel electrode through the signal line conducted through the first switch and the compensation element. 如申請專利範圍第1項所述的驅動電路，其中該驅動電路用以驅動一感應電極，該訊號線路連接於一感應線路以及該感應電極之間，當該第一開關以及該補償元件各自接收該第一電壓以及該第二電壓時，該感應線路依序經由該第一開關以及該補償元件所導通的該訊號線路傳遞一感應訊號至感應電極。 The driving circuit as described in item 1 of the patent application scope, wherein the driving circuit is used to drive a sensing electrode, the signal line is connected between a sensing line and the sensing electrode, when the first switch and the compensation element receive each During the first voltage and the second voltage, the sensing circuit sequentially transmits a sensing signal to the sensing electrode through the signal circuit conducted by the first switch and the compensation element. 如申請專利範圍第5項所述的驅動電路包括多個該第一開關，該些第一開關與該補償元件彼此串連，該些第一開關依序接收該第一電壓，該補償元件在每個該第一開關接受該第一電壓的同時接受該第二電壓。 The driving circuit according to item 5 of the patent application scope includes a plurality of the first switches, the first switches and the compensation element are connected in series with each other, the first switches sequentially receive the first voltage, and the compensation element Each of the first switches accepts the first voltage while receiving the second voltage. 一種驅動方法，用以驅動一包含至少一第一開關以及一補償元件的驅動電路，其中該第一開關包括一第一電晶體，該補償元件包括一第二電晶體，該第一電晶體的汲極、源極以及該第二電晶體的汲極、源極形成一訊號線路，一第二掃描線連接至該第二電晶體的閘極，該驅動方法包括：提供一第一電壓至該第一開關的一閘極以開啟該第一開關；提供一第二電壓至該補償元件以導通該訊號線路；以及以該訊號線路傳遞一資料訊號或一感應訊號；其中該第一電壓與該第二電壓彼此電性相反。 A driving method for driving a driving circuit including at least a first switch and a compensation element, wherein the first switch includes a first transistor, the compensation element includes a second transistor, and the first transistor The drain and source and the drain and source of the second transistor form a signal line, and a second scan line is connected to the gate of the second transistor. The driving method includes: providing a first voltage to the A gate of the first switch to turn on the first switch; provide a second voltage to the compensation element to turn on the signal line; and transmit a data signal or an inductive signal through the signal line; wherein the first voltage and the The second voltages are electrically opposite to each other. 如申請專利範圍第7項所述的驅動方法，其中該第一電壓的絕對值以及該第二電壓的絕對值大小相同。 The driving method as described in item 7 of the patent application range, wherein the absolute value of the first voltage and the absolute value of the second voltage are the same. 如申請專利範圍第7項所述的驅動方法，其中當該訊號線路連接於一畫素電極和一資料線之間時，該訊號線路在該第一開關以及該補償元件導通 該訊號線路時自該資料線傳遞該資料訊號至該畫素電極。 The driving method as described in item 7 of the patent application scope, wherein when the signal line is connected between a pixel electrode and a data line, the signal line is turned on at the first switch and the compensation element The signal line transmits the data signal from the data line to the pixel electrode. 如申請專利範圍第7項所述的驅動方法，其中當該訊號線路連接於一感應電極和一感應線路之間時，該訊號線路在該第一開關以及該補償元件導通該訊號線路時自該感應線路傳遞該感應訊號至該感應電極。 The driving method as described in item 7 of the patent application scope, wherein when the signal line is connected between a sensing electrode and a sensing line, the signal line is switched from the first switch and the compensation element when the signal line is turned on The sensing circuit transmits the sensing signal to the sensing electrode. 如申請專利範圍第10項所述的驅動方法，其中當該訊號線路由該補償元件以及多個該第一開關串聯而成時，依序傳遞該第一電壓至該些第一開關，且每次傳遞該第一電壓的同時也傳遞該第二電壓至該補償元件。 The driving method according to item 10 of the patent application scope, wherein when the signal line is formed by the compensation element and a plurality of the first switches connected in series, the first voltage is sequentially transmitted to the first switches, and each The second voltage is transferred to the compensation element at the same time as the first voltage is transferred.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200903428A (en) * 2007-07-02 2009-01-16 Chi Mei Optoelectronics Corp Pixel, display panel and driving method thereof
TW200905653A (en) * 2007-07-30 2009-02-01 Chi Mei Optoelectronics Corp Flat display apparatus, pixel structure and pixel driving method
TW201037437A (en) * 2009-04-10 2010-10-16 Chunghwa Picture Tubes Ltd Pixel structure, thin film transistor array, display panel, and display apparatus
TW201227696A (en) * 2010-12-30 2012-07-01 Au Optronics Corp LCD panel for compensating the feed-through voltage
US20130010015A1 (en) * 2010-03-19 2013-01-10 Sharp Kabushiki Kaisha Pixel circuit and display device
US20170018246A1 (en) * 2015-07-17 2017-01-19 Shenzhen China Star Optoelectronics Technology Co. Ltd. Pixel cell circuits of compensation feedback voltage

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0618851A (en) * 1992-07-06 1994-01-28 Fujitsu Ltd Liquid crystal driving circuit
JP2003167551A (en) * 2001-11-28 2003-06-13 Internatl Business Mach Corp <Ibm> Method for driving pixel circuits, pixel circuits and el display device and driving control device using the same
US8102346B2 (en) * 2007-09-20 2012-01-24 Sony Corporation Electro-optical device and electronic apparatus including the same
CN102087844A (en) * 2011-02-24 2011-06-08 华映视讯（吴江）有限公司 Compensation circuit of liquid crystal display panel
CN102790093B (en) * 2011-05-16 2015-04-29 上海天马微电子有限公司 Thin film transistor pixel structure and thin film transistor display device
CN102368499B (en) * 2011-10-27 2014-04-16 深圳市华星光电技术有限公司 TFT array substrate and liquid crystal panel
US20160071493A1 (en) * 2014-09-10 2016-03-10 Innolux Corporation Display device and display method thereof for compensating pixel voltage loss
CN104777932A (en) * 2015-04-01 2015-07-15 深圳市华星光电技术有限公司 Touch control liquid crystal display and touch control liquid crystal panel thereof
CN104991363A (en) * 2015-07-17 2015-10-21 深圳市华星光电技术有限公司 Compensation feedback voltage pixel unit circuit
CN207352947U (en) * 2017-10-25 2018-05-11 中华映管股份有限公司 Display panel and its image element circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200903428A (en) * 2007-07-02 2009-01-16 Chi Mei Optoelectronics Corp Pixel, display panel and driving method thereof
TW200905653A (en) * 2007-07-30 2009-02-01 Chi Mei Optoelectronics Corp Flat display apparatus, pixel structure and pixel driving method
TW201037437A (en) * 2009-04-10 2010-10-16 Chunghwa Picture Tubes Ltd Pixel structure, thin film transistor array, display panel, and display apparatus
US20130010015A1 (en) * 2010-03-19 2013-01-10 Sharp Kabushiki Kaisha Pixel circuit and display device
TW201227696A (en) * 2010-12-30 2012-07-01 Au Optronics Corp LCD panel for compensating the feed-through voltage
US20170018246A1 (en) * 2015-07-17 2017-01-19 Shenzhen China Star Optoelectronics Technology Co. Ltd. Pixel cell circuits of compensation feedback voltage

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