CN101197121A - LCD and its driving control circuit - Google Patents
LCD and its driving control circuit Download PDFInfo
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- CN101197121A CN101197121A CNA2007103008325A CN200710300832A CN101197121A CN 101197121 A CN101197121 A CN 101197121A CN A2007103008325 A CNA2007103008325 A CN A2007103008325A CN 200710300832 A CN200710300832 A CN 200710300832A CN 101197121 A CN101197121 A CN 101197121A
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Abstract
The invention relates to a liquid crystal displayer and a driving control circuit thereof. The driving control circuit comprises a voltage switch unit and a selection unit, wherein the selection unit selects output voltages by the control signal and the voltage switch unit outputs the selected voltage to a common voltage end in the pixel according to scanning signal, thus achieving the effect of voltage adjusting, and control the voltage value which is output to the common voltage end by the scanning signal and the control signal at the same time, thereby effectively reducing driving frequency of alternative current voltage and having the advantage of direct current driving, and further reducing power consumption of the liquid crystal displayer and improving the problem of bad video quality caused by feed-through penetration effect.
Description
Technical field
The invention relates to a kind of Drive and Control Circuit and use the LCD of this Drive and Control Circuit, particularly about the driving circuit of modulation common voltage and use the LCD of this driving circuit.
Background technology
Fig. 1 is the image element circuit 1 of available liquid crystal display, its comprise thin film transistor (TFT) (Thin-FilmTransistor, TFT) 11, liquid crystal capacitance 12 and storage capacitors 13.Liquid crystal capacitance 12 and storage capacitors 13 have common voltage end points 121 and 131 respectively to receive common voltage.The control signal that thin film transistor (TFT) 11 transmits in its grid G received scanline (figure does not illustrate).After sweep trace control signal conducting membrane transistor 11, the data on the data line (figure does not illustrate) just can be written in the liquid crystal capacitance 12.Simultaneously, data voltage then is stored in the storage capacitors 13, therefore can continue supply data voltage and give liquid crystal electric capacity 12 after thin film transistor (TFT) 11 cut out.
Yet, can there be stray capacitance 14 between the grid G of thin film transistor (TFT) 11 and drain D, therefore when control signal conversion that grid G received (by just transferring to negative or just transferring to) by bearing, voltage difference can be coupled to storage capacitors 13, thereby the voltage on the change storage capacitors 13, such phenomenon is called feedthrough penetration effect (feed through effect).Can produce change because of the influence of feedthrough penetration effect owing to be stored in the voltage of storage capacitors 13, just the data voltage that originally writes produces and changes, and therefore can cause LCD image display quality variation.
Please refer to Fig. 2 A and Fig. 2 B, Fig. 2 A is for using the existing image element circuit 2 that solves the feedthrough penetration effect; Fig. 2 B is the sequential chart of the image element circuit 2 of depiction 2A then.Image element circuit 2 comprises thin film transistor (TFT) 21, liquid crystal capacitance 22 and storage capacitors 23, mode of connection to each other is identical with image element circuit 1, wherein thin film transistor (TFT) 21 couples with data line 24, the common voltage end points 221 of liquid crystal capacitance 22 receives the direct current common voltage, and 231 of the common voltage end points of storage capacitors 23 receive and exchange common voltage.
Among Fig. 2 B, G1 is the sweep signal that is sent to thin film transistor (TFT) 21, G2 is for being sent to the sweep signal of next stage thin film transistor (TFT) (figure does not illustrate), and VCOM-AC is for providing to the waveform of the VCOM signal of common voltage end points 231, and Vd then represents the magnitude of voltage that writes storage capacitors 23 by data line 24.When sweep signal G1 makes thin film transistor (TFT) 21 conductings, the magnitude of voltage Vd of data line 24 writes in the storage capacitors 23, this moment, VCOM-AC was a low level, when sweep signal G1 is converted to low level by high levle, magnitude of voltage Vd is drop-down because of the influence that is subjected to stray capacitance, therefore can can't keep the data value that writes.At this moment, being transformed into high levle by VCOM-AC by low level can up draw the accurate position of magnitude of voltage Vd, so just can reduce the influence that the feedthrough penetration effect is caused.
Yet, need come modulation according to data-signal owing to exchange the type of drive of demodulating voltage, thereby need extra driving circuit to come the modulation common voltage, so also can increase extra cost.Therefore, need and to reach the new liquid crystal display driving method of saving the cost of driving circuit under the prerequisite of identical result.
Summary of the invention
A purpose of the present invention is to provide a kind of Drive and Control Circuit, and it comprises first voltage switch unit and the selected cell.The described first voltage switch unit is coupled to first sweep trace, second sweep trace and a plurality of first pixel cell, and wherein said these first pixel cells are positioned at the confluce of a plurality of data lines and described first sweep trace.The described first voltage switch unit is in order to second sweep signal that first sweep signal that provided according to control signal, described first sweep trace and described second sweep trace are provided, transmit first output voltage and second output voltage one of them to described these first pixel cells.Described selected cell is coupled to the described first voltage switch unit, in order to according to described control signal, exports described first output voltage and described second output voltage to the described first voltage switch unit.
Another object of the present invention is to provide a kind of LCD, it comprises at least one data line, first sweep trace, second sweep trace, a plurality of first pixel cell and voltage switch unit.Described first sweep trace is in order to provide first sweep signal; Described second sweep trace is in order to provide second sweep signal.Described these first pixel cells are positioned at the confluce of described at least one data line and described first sweep trace.Described voltage switch unit is coupled to described first sweep trace, described second sweep trace and described these first pixel cells.Described voltage switch unit is according to control signal, described first sweep signal and described second sweep signal, provide first output voltage and second output voltage one of them to described these first pixel cells.
By above-mentioned configuration, Drive and Control Circuit of the present invention and LCD can solve the problem of effect of parasitic capacitance display quality, can save the cost of driving circuit simultaneously, and can reach the function of common voltage modulation, and can reduce power consumption effectively.
Behind the embodiment of consulting accompanying drawing and describing subsequently, the knowledgeable that knows usually with the technical field of the invention just can understand other purposes of the present invention, effect and advantage, and technological means of the present invention and enforcement aspect.
Description of drawings
Fig. 1 is the image element circuit of available liquid crystal display;
Fig. 2 A is the existing dot structure with the common voltage modulation;
Fig. 2 B is the sequential chart of image element circuit shown in Fig. 2 A;
Fig. 3 is a Drive and Control Circuit of the present invention;
Fig. 4 is LCD of the present invention and Drive and Control Circuit thereof; And
Fig. 5 is the coherent signal sequential chart of LCD of the present invention.
Drawing reference numeral
1: image element circuit 121,131: common voltage end
11: thin film transistor (TFT) 12: liquid crystal capacitance
13: storage capacitors 14: stray capacitance
2: image element circuit 21: thin film transistor (TFT)
22: liquid crystal capacitance 23: storage capacitors
24: data line 300: Drive and Control Circuit
221: direct current common voltage end 231: exchange the common voltage end
31: the first voltage switch units 32: selected cell
34: the second sweep traces of 33: the first sweep traces
Switch 312 in 311: the first: second switch
322: the second selector switch of 321: the first selector switch
324: the four selector switch of 323: the three selector switch
325: 326: the second input ends of first input end
328: the second output terminals of 327: the first output terminals
329: phase inverter 330: control end
POL: control signal 400: liquid crystal indicator
S1, S2, S3: data line G1: first sweep trace
G2: the second sweep trace G3: three scan line
G4: the 4th sweep trace G5: the 5th sweep trace
401: 402: the first voltage switch units of selected cell
403: the second voltage switch units 404: tertiary voltage switch unit
405: the four voltage switch units
M1, M3, M5, M7: first switch
M2, M4, M6, M8: second switch
A: the first output terminal B: second output terminal
V1: the first input signal V2: second input signal
Clc: liquid crystal capacitance Cst: first storage capacitors
Cgs: the second storage capacitors P00: first pixel cell
P10 second pixel cell
Vcom-AC1, Vcom-AC2. common electrode end
Vcom-AC3, Vcom-AC4: common electrode end
D00: magnitude of voltage D10: magnitude of voltage
Embodiment
Please refer to Fig. 3, this figure is the embodiment of Drive and Control Circuit of the present invention.Drive and Control Circuit 300 is coupled to first sweep trace 33, second sweep trace 34 and a plurality of first pixel cell, and described these first pixel cells are positioned at the confluce of first sweep trace 33 and a plurality of data lines.First sweep trace 33 provides first sweep signal; Second sweep trace 34 provides second sweep signal.Drive and Control Circuit 300 is in order to according to control signal, exports a suitable voltage to described these first pixel cells.
Drive and Control Circuit 300 comprises the first voltage switch unit 31 and selected cell 32.The first voltage switch unit 31 is coupled to first sweep trace 33, second sweep trace 34 and described these first pixel cells.Selected cell 32 is coupled to the first voltage switch unit 31, in order to export first output voltage and second output voltage to the first voltage switch unit 31 according to control signal POL.The first voltage switch unit 31 is according to control signal, first sweep signal and second sweep signal, transmit first output voltage and second output voltage one of them to described these first pixel cells.
Particularly, the first voltage switch unit 31 has first switch 311 and second switch 312.First switch 311 has control end, input end and output terminal, wherein control end is couple to first sweep trace 33, output terminal is coupled to the common electrode end Vcom-AC1 of each first pixel cell, and input end then is couple to selected cell 32, receives first output voltage in order to select unit 32 certainly.Second switch 312 has control end, input end and output terminal, wherein control end is coupled to second sweep trace 34, output terminal is coupled to the common electrode end Vcom-AC1 of each first pixel cell, and input end then is couple to selected cell 32, receives second output voltage in order to select unit 32 certainly.First switch 311 and second switch 312 all can be realized by transistor.
Selected cell 32 comprises control end 330, first input end 325, second input end 326, first output terminal 327, second output terminal 328, first selector switch 321, second selector switch 322, the 3rd selector switch 323 and the 4th selector switch 324.First output terminal 327 is coupled to first switch 311; Second output terminal 328 is coupled to second switch 312; First selector switch 321 is coupled to the first input end 325 and first output terminal 327; Second selector switch 322 is coupled to the first input end 325 and second output terminal 328; The 3rd selector switch 323 is coupled to second input end 326 and second output terminal 328; The 4th selector switch 324 is coupled to second input end 326 and first output terminal 327.
Control end 330 is in order to receive control signal POL; First input end 325 is in order to receive the first input signal V1; Second input end 326 is in order to receive the second input signal V2.According to control signal POL, the output of first output terminal 327 and the first input signal V1 and the second input signal V2 one of them or its make up the first relevant output voltage.Same, according to control signal POL, 328 outputs of second output terminal and first input signal and second input signal one of them or its make up the second relevant output voltage.
The control of first polarity of first selector switch 321 and the 3rd selector switch 323 suspension control signal POL, and the control of second polarity of second selector switch 322 and the 4th selector switch 324 suspension control signal POL.Second polarity is the anti-phase of first polarity, is produced by phase inverter 329 by control signal POL.In other words, first selector switch 321 and the 3rd selector switch 323 are opened according to first polarity of control signal POL, to export first output voltage and second output voltage respectively; And second selector switch 322 and the 4th selector switch 324 are opened according to second polarity of control signal POL, to export described second output voltage and first output voltage respectively.Because first polarity and second polarity are anti-phase each other, so second group of switch that first group of switch being constituted of first selector switch 321 and the 3rd selector switch 323 and second selector switch 322 and the 4th selector switch 324 are constituted can not opened simultaneously.
When first group of switch (i.e. first selector switch 321 and the 3rd selector switch 323) conducting, the first input signal V1 outputs to first output terminal, 327 second input signal V2 and then outputs to second output terminal 328; Opposite, when second group of switch (i.e. second selector switch 322 and the 4th selector switch 324) conducting, the first input signal V1 outputs to second output terminal, 328 second voltage V2 and then outputs to first output terminal 327.Because selected cell 32 is controlled by control signal POL, therefore can reach the driving effect of page counter-rotating (Frame Inversion).
Because the input end of first switch 311 of the first voltage switch unit 31 and the input end of second switch 312 are coupled to first output terminal 327 and second output terminal 328 of selected cell 32 respectively, and selected cell 32 has been selected the first input signal V1 and the second input signal V2 are outputed to which output terminal (i.e. first output terminal 327 or second output terminal 328), therefore when first sweep signal on first sweep trace 33 was opened first switch 311, the voltage that is connected to the input end of first switch 311 can output on the common voltage end Vcom-AC1 by output terminal.In like manner, when second sweep signal on second sweep trace 34 was opened second switch 312, the voltage that is connected to the input end of second switch 312 can output on the common voltage end Vcom-AC1 by output terminal.
Implement in the aspect in other, Drive and Control Circuit 300 can be coupled to three scan line and a plurality of second pixel cell in addition, and described these second pixel cells are positioned at the confluce of second sweep trace 34 and described these data lines.Three scan line provides the 3rd sweep signal.Drive and Control Circuit 300 is exported suitable voltage to described these second pixel cells in order to according to control signal, and relevant suitable voltage will be in hereinafter describing.
Drive and Control Circuit 300 can comprise the second voltage switch unit in addition, and the concrete structure of this second voltage switch unit is identical with the first voltage switch unit 31; The coupling mode of the second voltage switch unit and selected cell 32 is also similar with the coupling mode of selected cell 32 with the first voltage switch unit 31; The coupling mode of the coupling mode of the second voltage switch unit and described these second pixel cells and the first voltage switch unit 31 and described these first pixel cells is similar.
Particularly, the second voltage switch unit is coupled to selected cell 32, second sweep trace 34, three scan line and described these second pixel cells.Three sweep signal of the second voltage switch unit in order to be provided according to control signal POL, second sweep signal 34 and three scan line exported described first output voltage and described second output voltage to described these second pixel cells.
In detail, the second voltage switch unit comprises first switch and second switch.First switch has control end, input end and output terminal, and wherein control end is coupled to second sweep trace 34, and output terminal is coupled to each described second pixel cell, and input end is in order to receive second output voltage.Second switch has control end, input end and output terminal, and wherein control end is coupled to three scan line, and output terminal is coupled to each described second pixel cell, and input end is in order to receive described first output voltage.
Second output terminal 328 of selected cell 32 can be coupled to first switch of the second voltage switch unit, in order to according to control signal POL, output and the first input signal V1 and the second input signal V2 one of them or its make up the second relevant output voltage, to each described second pixel cell.First output terminal 327 of selected cell can be coupled to the second switch of the second voltage switch unit, in order to according to control signal POL, output and the first input signal V1 and one of them first relevant output voltage of the second input signal V2 are to each described second pixel cell.
By the way, can reach the AC driving mode of modulation common voltage end.Because a sweep trace just drove once in each page time, therefore can significantly reduce the frequency of operation, so owing to common terminal voltage after sweep signal is closed transistor can maintain the effect that fixing accurate position also has direct drive, therefore can significantly reduce power consumption simultaneously.
Please refer to Fig. 4, this figure is the embodiment of liquid crystal indicator of the present invention.Liquid crystal indicator 400 comprises a plurality of data lines (S1, S2 and S3), a plurality of sweep traces (G1, G2, G3, G4 and G5), a plurality of pixel cell and Drive and Control Circuit.That sweep trace G1, G2, G3, G4, G5 claim successively is the first sweep trace G1, the second sweep trace G2, three scan line G3, the 4th sweep trace G4 and the 5th sweep trace G5.Pixel cell is positioned at described these data lines S1, S2, S3 and described these sweep traces G1, G2, G3, G4 intersection part; Particularly, first pixel cell is positioned at described these data lines S1, S2, S3 and the first sweep trace G1 intersection part, and second pixel cell is positioned at described these data lines S1, S2, S3 and the second sweep trace G2 intersection part, and the rest may be inferred.The first sweep trace G1 is in order to provide first sweep signal, and the second sweep trace G2 is in order to provide second sweep signal, and the rest may be inferred.Be stressed that the number of sweep trace and data line is not to be used for limiting the scope of the invention only for convenience of description.
Each described first pixel cell comprises pixel switch T, pixel capacitance Clc, the first storage capacitors Cst and the second storage capacitors Cgs.Pixel switch is coupled to the first sweep trace G1.Pixel capacitance Clc has first end points and second end points, and wherein first end points is coupled to pixel switch, and second end points is in order to receive a predeterminated voltage.The first storage capacitors Cst has first end points and second end points, and wherein first end points is coupled to pixel switch, and second end points is coupled to Drive and Control Circuit.Second storage capacitors has first end points and second end points, and wherein first end points is coupled to pixel switch, and second end points is coupled to Drive and Control Circuit.Yet, to implement in the aspect in other, first pixel cell can not have second storage capacitors, also can reach effect of the present invention.
Each described second pixel cell also comprises pixel switch, pixel capacitance and first storage capacitors.Pixel switch is coupled to described second sweep trace.Pixel capacitance has first end points and second end points, and wherein first end points is coupled to described pixel switch, and second end points is in order to receive predeterminated voltage.First storage capacitors has first end points and second end points, and wherein first end points is coupled to pixel switch, and second end points is coupled to Drive and Control Circuit.Second storage capacitors has first end points and second end points, and wherein first end points is coupled to pixel switch, and second end points is coupled to Drive and Control Circuit.The structure of other pixel cell is also similar with first pixel cell and second pixel cell, and difference only is to be coupled to the different scanning line.Yet, to implement in the aspect in other, second pixel cell can not have second storage capacitors, also can reach effect of the present invention.
Drive and Control Circuit comprises selected cell 401 and a plurality of voltage switch unit 402,403,404,405.Aforesaid voltage switch unit 402～405 is referred to as the first voltage switch unit 402, the second voltage switch unit 403, tertiary voltage switch unit 404 and the 4th voltage switch unit 405 successively.The concrete structure of voltage switch unit 402～405 is identical with the first voltage switch unit 31 of previous embodiment, so do not give unnecessary details, yet each of voltage switch unit 402～405 and the coupling mode of Drive and Control Circuit are also incomplete same, after this partly will be specified in.
Drive and Control Circuit (being selected cell 401 and voltage switch unit 402～405) is arranged at the non-display area of liquid crystal indicator 400.Voltage switch unit 402～405 is set in twos between the sweep trace.For instance, the first voltage switch unit 402 is set between the first sweep trace G1 and the second sweep trace G2 and with it and couples, and the second voltage switch unit 403 is set between the second sweep trace G2 and the three scan line G3 and with it and couples, and the rest may be inferred.The first voltage switch unit 402 can be coupled to described these first pixel cells, and the second voltage switch unit 403 can be coupled to described these second pixel cells, and the rest may be inferred.
Drive and Control Circuit is according to control signal POL, first sweep signal and second sweep signal, transmit first output voltage and second output voltage one of them to described these first pixel cells.Drive and Control Circuit is according to control signal POL, second sweep signal and the 3rd sweep signal, provide first output voltage and second output voltage one of them to described these second pixel cells.Specifically reaching mode will be described in subsequent paragraph.
The selected cell 401 of Drive and Control Circuit is to be provided with separately.The concrete structure of selected cell 401 is identical with the selected cell of previous embodiment 32, so do not give unnecessary details.It should be noted that first output terminals A and the second output terminal B and voltage switch unit 402～405th of selected cell 401, be connected with interlace mode.For instance, the input end of the first switch M1 of the first voltage switch unit 402 is coupled to first output terminals A of selected cell 401, and the input end of second switch M2 is coupled to the second output terminal B of selected cell 401; The input end of the first switch M3 of the second voltage switch unit 403 then is coupled to the second output terminal B of selected cell 401, and the input end of second switch M4 then is coupled to first output terminals A of selected cell 401.Same, first switch of pixel cell and second switch all can come specific implementation with a transistor respectively.Connect the type of drive that then can realize line counter-rotating (Line Inversion) with this rule ordering.
Please merge with reference to figure 4 and Fig. 5, wherein Fig. 5 is the relevant clock figure of liquid crystal indicator 400.Next its operating principle will be described, from top to bottom be respectively sweep trace G1 among Fig. 5, G2, the clock figure of G3, the change in voltage of the common voltage end Vcom-AC1 of described these first pixel cells, the change in voltage of the common voltage end Vcom-AC2 of described these second pixel cells, the change in voltage of the common voltage end Vcom-AC3 of described these the 3rd pixel cells, the change in voltage of the common voltage end Vcom-AC4 of described these the 4th pixel cells, the clock figure of control signal POL, write the magnitude of voltage D00 and the magnitude of voltage D10 that writes described these second pixel cells P10 of described these first pixel cells P00.
When the voltage on the first sweep trace G1 is high levle voltage, the first switch M1 of the conducting first voltage switch unit 402, the first input signal V1 that then is connected to the first switch M1 then outputs to common voltage end Vcom-AC1.Therefore, can see that the data voltage D00 that writes pixel P00 begins charging, just stop charging until the signal of the first sweep trace G1 is reduced to low level.Owing to for fear of the conducting simultaneously of multi-strip scanning line, can insert a time delay two adjacent sweep signals in the general design, therefore at this section in time delay, the voltage that is stored in the first storage capacitors Cst of first pixel cell is kept fixing.
When the voltage of the second sweep trace G2 is high levle, the second switch M2 of the conducting first voltage switch unit 402, export the second input signal V2 this moment to common voltage end Vcom-AC1.Because the second input signal V2 is a high levle, therefore pass through the coupling effect of the first storage capacitors Cst, the voltage quasi position that is stored in the first storage capacitors Cst up can be promoted again a Δ V (being V2-V1), therefore can see be stored in the first storage capacitors Cst voltage at last than original value height a Δ V value.Borrow aforesaid way, can compensate the feedthrough penetration effect that causes because of pixel switch, the image display quality of influence that the voltage that reduction is stored in the first storage capacitors Cst because of the feedthrough penetration effect causes changes and then raising picture.
In like manner, because the second sweep trace G2 has opened the second switch M2 of the first voltage switch unit 402 and the first switch M3 of the second voltage switch unit 403 simultaneously, therefore the first switch M3 exports the second input signal V2 to the common voltage end Vcom-AC2 of described these second pixel cells P10.When three scan line G3 is high levle, second switch M4 that will the conducting second voltage switch unit 403, second switch M4 has then exported the first input signal V1 of low level to common voltage end Vcom-AC2.The voltage of sweep trace is in high levle, be stored in the action that the first storage capacitors Cst among the second pixel cell P10 is discharging, therefore when the first input signal V1 that has exported low level as second switch M4 is to common voltage end Vcom-AC2, because the end of the first storage capacitors Cst of the described second pixel cell P10 is connected to therefore Vcom-AC2 can so then can be coupled to the second pixel cell P10 during for V1 when the voltage of Vcom-AC1 the first storage capacitors Cs, drags down a Δ V of the data voltage D10 value that is stored in the first storage capacitors Cst.
Because the time of a page of sweep trace just can open once, therefore before sweep trace was opened next time, common voltage all can maintain the effect of fixing accurate position and direct drive being arranged.When sweep trace is opened in proper order and obtained the effect of AC driving, can significantly reduce the voltage quasi position of data-signal, and then significantly reduce power consumption.In addition, because selected cell 401 is controlled by control signal POL, therefore can reach the effect of page inversion driving very simply.
Though the present invention discloses as above with embodiment; yet it is not in order to limit the present invention; any have a technical field of the invention know the knowledgeable usually; without departing from the spirit and scope of the present invention; can do various changes and retouching, so protection scope of the present invention is worked as with being as the criterion that claims were defined.
Claims (17)
1. Drive and Control Circuit that is used for LCD, it is characterized in that, described LCD comprises a plurality of data lines, one first sweep trace, one second sweep trace and a plurality of first pixel cell, described first sweep trace is in order to provide one first sweep signal, described second sweep trace is in order to provide one second sweep signal, described these first pixel cells are positioned at the confluce of described these data lines and described first sweep trace, and described Drive and Control Circuit comprises:
One first voltage switch unit, be coupled to described first sweep trace, described second sweep trace and described a plurality of first pixel cell, described these first pixel cells are positioned at the confluce of a plurality of data lines and described first sweep trace, the described first voltage switch unit is in order to one second sweep signal that one first sweep signal that provided according to a control signal, described first sweep trace and described second sweep trace are provided, transmit one first output voltage and one second output voltage one of them to described these first pixel cells; And
One selected cell is coupled to the described first voltage switch unit, in order to according to described control signal, exports described first output voltage and described second output voltage to the described first voltage switch unit.
2. Drive and Control Circuit as claimed in claim 1 is characterized in that, the wherein said first voltage switch unit comprises:
One first switch has a control end, an input end and an output terminal, and described control end is coupled to described first sweep trace, and described output terminal is coupled to each described first pixel cell, and described input end is in order to receive described first output voltage; And
One second switch has a control end, an input end and an output terminal, and described control end is coupled to described second sweep trace, and described output terminal is coupled to each described first pixel cell, and described input end is in order to receive described second output voltage.
3. Drive and Control Circuit as claimed in claim 2 is characterized in that, wherein said selected cell comprises:
One control end is in order to receive described control signal;
One first input end is in order to receive one first input signal;
One second input end is in order to receive one second input signal;
One first output terminal is coupled to described first switch, and in order to according to described control signal, output and described first input signal and described second input signal one of them or its make up relevant described first output voltage; And
One second output terminal is coupled to described second switch, and in order to according to described control signal, output and described first input signal and described second input signal one of them or its make up relevant described second output voltage.
4. Drive and Control Circuit as claimed in claim 3 is characterized in that, wherein said selected cell comprises in addition:
One first selector switch is coupled to described first input end and described first output terminal;
One second selector switch is coupled to described first input end and described second output terminal;
One the 3rd selector switch is coupled to described second input end and described second output terminal; And
One the 4th selector switch is coupled to described second input end and described first output terminal;
Wherein, described first selector switch and described the 3rd selector switch are opened according to one first polarity of described control signal, to export described first output voltage and described second output voltage respectively, described second selector switch and described the 4th selector switch are opened according to one second polarity of described control signal, to export described second output voltage and described first output voltage respectively.
5. Drive and Control Circuit as claimed in claim 4 is characterized in that, described Drive and Control Circuit comprises in addition:
One second voltage switch unit, be coupled to described selected cell, described second sweep trace, a three scan line and a plurality of second pixel cell, described these second pixel cells are positioned at the confluce of described these data lines and described second sweep trace, one three sweep signal of the described second voltage switch unit in order to be provided according to described control signal, described second sweep signal and described three scan line, transmit described first output voltage and described second output voltage one of them to described these second pixel cells.
6. Drive and Control Circuit as claimed in claim 5 is characterized in that, the wherein said second voltage switch unit comprises:
One first switch has a control end, an input end and an output terminal, and described control end is coupled to described second sweep trace, and described output terminal is coupled to each described second pixel cell, and described input end is in order to receive described second output voltage; And
One second switch has a control end, an input end and an output terminal, and described control end is coupled to described three scan line, and described output terminal is coupled to each described second pixel cell, and described input end is in order to receive described first output voltage.
7. Drive and Control Circuit as claimed in claim 6, described second output terminal of wherein said selected cell is coupled to described first switch of the described second voltage switch unit in addition, in order to according to described control signal, output and described first input signal and described second input signal one of them or its make up relevant described second output voltage, to each described second pixel cell, and described first output terminal of described selected cell is coupled to the described second switch of the described second voltage switch unit in addition, in order to according to described control signal, output and described first input signal and one of them relevant described first output voltage of described second input signal are to each described second pixel cell.
8. a LCD is characterized in that, described LCD comprises:
A plurality of data lines;
One first sweep trace is in order to provide one first sweep signal;
One second sweep trace is in order to provide one second sweep signal;
A plurality of first pixel cells are positioned at the confluce of described these data lines and described first sweep trace; And
One Drive and Control Circuit, be coupled to described first sweep trace, described second sweep trace and described these first pixel cells, described Drive and Control Circuit is in order to according to a control signal, described first sweep signal and described second sweep signal, and one of them is sent to described these first pixel cells with one first output voltage and one second output voltage.
9. LCD as claimed in claim 8 is characterized in that, wherein each described first pixel cell comprises:
One pixel switch is coupled to described first sweep trace;
One pixel capacitance has one first end points and one second end points, and described first end points is coupled to described pixel switch, and described second end points is in order to receive a predeterminated voltage; And
One first storage capacitors has one first end points and one second end points, and described first end points is coupled to described pixel switch, and described second end is coupled to described Drive and Control Circuit.
10. LCD as claimed in claim 9 is characterized in that, wherein each described first pixel cell comprises in addition:
One second storage capacitors has one first end points and one second end points, and described first end points is coupled to described pixel switch, and described second end points is coupled to described Drive and Control Circuit.
11. LCD as claimed in claim 9 is characterized in that, wherein said Drive and Control Circuit comprises:
One first voltage switch unit comprises:
One first switch, have a control end, an input end and an output terminal, described control end is coupled to described first sweep trace, described output terminal is coupled to described second end points of each described first storage capacitors, described input end is in order to receive described first output voltage, to transmit described second end points of described first output voltage to each described first storage capacitors by described output terminal; And
One second switch, have a control end, an input end and an output terminal, described control end is coupled to described second sweep trace, described output terminal is coupled to described second end points of each described first storage capacitors, described input end is in order to receive described second output voltage, to transmit described second end points of described second output voltage to each described first storage capacitors by described output terminal.
12. LCD as claimed in claim 11 is characterized in that, wherein said Drive and Control Circuit comprises:
One selected cell has:
One control end is in order to receive described control signal;
One first input end is in order to receive one first input signal;
One second input end is in order to receive one second input signal;
One first output terminal is coupled to described first switch, and in order to according to described control signal, output and described first input signal and described second input signal one of them or its make up relevant described first output voltage; And
One second output terminal is coupled to described second switch, and in order to according to described control signal, output and described first input signal and described second input signal one of them or its make up relevant described second output voltage.
13. LCD as claimed in claim 12 is characterized in that, wherein said selected cell comprises:
One first selector switch is coupled to described first input end and described first output terminal;
One second selector switch is coupled to described first input end and described second output terminal;
One the 3rd selector switch is coupled to described second input end and described second output terminal; And
One the 4th selector switch is coupled to described second input end and described first output terminal;
Wherein, described first selector switch and described the 3rd selector switch are opened according to one first polarity of described control signal, to export described first output voltage and described second output voltage respectively, described second selector switch and described the 4th selector switch are opened according to one second polarity of described control signal, to export described second output voltage and described first output voltage respectively.
14. LCD as claimed in claim 13 is characterized in that, described LCD comprises in addition:
One three scan line is in order to provide one the 3rd sweep signal; And
A plurality of second pixel cells are positioned at the confluce of described these data lines and described second sweep trace, and each described second pixel cell comprises:
One pixel switch is coupled to described second sweep trace;
One pixel capacitance has one first end points and one second end points, and described first end points is coupled to described pixel switch, and described second end points is in order to receive described predeterminated voltage; And
One first storage capacitors has one first end points and one second end points, and described first end points is coupled to described pixel switch;
Wherein, described Drive and Control Circuit is coupled to described three scan line and described these second pixel cells in addition, described Drive and Control Circuit is in addition in order to according to described control signal, described second sweep signal and described the 3rd sweep signal, and one of them is sent to described these second pixel cells with described first output voltage and described second output voltage.
15. LCD as claimed in claim 14 is characterized in that, wherein each described second pixel cell comprises in addition:
One second storage capacitors has one first end points and one second end points, and described first end points is coupled to corresponding described pixel switch, and described second end points is coupled to described Drive and Control Circuit.
16. LCD as claimed in claim 14 is characterized in that, wherein said Drive and Control Circuit comprises in addition:
One second voltage switch unit comprises:
One first switch, have a control end, an input end and an output terminal, described control end is coupled to described second sweep trace, described output terminal is coupled to described second end points of described first storage capacitors of each described second pixel cell, described input end is in order to receive described second output voltage, to transmit described second end points of described second output voltage to described first storage capacitors of each described second pixel cell by described output terminal; And
One second switch, have a control end, an input end and an output terminal, described control end is coupled to described three scan line, described output terminal is coupled to described second end points of described first storage capacitors of each described second pixel cell, described input end is in order to receive described first output voltage, described first output voltage is sent to described second end points of described first storage capacitors of each described second pixel cell by described output terminal.
17. LCD as claimed in claim 16, it is characterized in that, described second output terminal of wherein said selected cell is coupled to described first switch of the described second voltage switch unit in addition, in order to according to described control signal, described first storage capacitors that will described second output voltage relevant exports each described second pixel cell to described first input signal and described second input signal one of them or its combination, and described first output terminal of described selected cell is coupled to the described second switch of the described second voltage switch unit in addition, in order to according to described control signal, will export described first storage capacitors of each described second pixel cell to described first input signal and one of them relevant described first output voltage of described second input signal.
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| CNB2007103008325A CN100561563C (en) | 2007-12-29 | 2007-12-29 | LCD and Drive and Control Circuit thereof |
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| CNB2007103008325A CN100561563C (en) | 2007-12-29 | 2007-12-29 | LCD and Drive and Control Circuit thereof |
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