CN101655642A - Liquid crystal display panel and method for driving same - Google Patents
Liquid crystal display panel and method for driving same Download PDFInfo
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- CN101655642A CN101655642A CN200810213644A CN200810213644A CN101655642A CN 101655642 A CN101655642 A CN 101655642A CN 200810213644 A CN200810213644 A CN 200810213644A CN 200810213644 A CN200810213644 A CN 200810213644A CN 101655642 A CN101655642 A CN 101655642A
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Abstract
The invention discloses a liquid crystal display panel, which comprises a first scanning line, a second scanning line, a first data wire, a second data wire and a first pixel unit, wherein the first scanning line is enabled in a scanning period in a first image period and disabled in a second image period; the second scanning line is enabled in a scanning period in the second image period and disabled in the first image period; the first data wire is used for transmitting a first data signal; the second data wire is used for transmitting a second data signal; the first pixel unit comprises a first liquid crystal capacitor, a first switch and a second switch; the first switch is controlled by the first scanning line, and when the first scanning line is enabled, the first switch transmits the first data signal to the first liquid crystal capacitor; and the second switch is controlled by the second scanning line, and when the second scanning line is enabled, the second switch transmits the second data signal to the first liquid crystal capacitor.
Description
Technical field
The invention relates to a kind of display panel, and particularly relevant for a kind of display panels and driving method thereof.
Background technology
In the LCD, the polarity of pixel voltage is just changed once at set intervals, is destroyed with the physical characteristics of avoiding the liquid crystal molecule in the pixel.Its common type of drive for example is a counter-rotating (dotinversion) and row counter-rotating (column inversion).With regard to the picture characteristic of display relatively went up, the image quality of the point that type of drive the produced counter-rotating display panels of some counter-rotating was comparatively good.Yet, in traditional display panels,, and cause having the problem of high flow rate power but because the type of drive of some counter-rotating makes that the number of times of signal voltage reversal of poles is comparatively frequent.
In order to reduce a required consumed power of counter-rotating display panels, tradition utilizes the LCD of positive and negative pixel (flippixel) framework to be suggested, and its synoptic diagram as shown in Figure 1.In this LCD 100, display panels 120 is to be formed by an odd pixel column 121 and 122 frameworks of even pixel row in regular turn.The pixel cell of odd pixel column 121 receives the pixel voltage that is transmitted to D (M) by data line D (1) respectively, pixel cell in the even pixel row 122 is driven to D (M+1) by data line D (2), and adjacent data line D (1) is designed to the voltage of opposed polarity to the pixel voltage of D (M+1).Wherein, M is a positive integer.Under this positive and negative pixel structure, cooperate the type of drive of row counter-rotating can reach an effect of counter-rotating display panels.Purport is utilized the row counter-rotating but not the type of drive of some counter-rotating because of it, so be minimized consumed power.Yet, utilize in the display panels 120 of this positive and negative pixel institute framework, can produce the transverse electric field of an accumulation and influence its picture quality, and this transverse electric field mostly occurs between the data line in show electrode and its left side to the influence of liquid crystal, its generation reason is as described below.
With the pixel cell Pa of odd pixel column 121 and the pixel cell Pb of even pixel row 122 is example.The liquid crystal capacitance Clca of pixel cell Pa and Pb and Clcb receive respectively by data line D (1) and D (2) to transmit and next pixel voltage.In period, data line D (1) and D (2) transmit opposite polarity pixel voltage respectively at first picture.For instance, data line D (1) transmits a positive polarity pixel voltage and a negative polarity pixel voltage with D (2) respectively in the first picture period.Therefore, liquid crystal capacitance Clca and Clcb store positive polarity and negative polarity pixel voltage respectively.So among the pixel cell Pa, the voltage of the pixel electrode of liquid crystal capacitance Clca and transistor T a is higher than among the pixel cell Pb, the voltage of the pixel electrode of transistor T b.
At this moment, because data line D (1) is the positive polarity pixel voltage, so the electric field between the pixel electrode of pixel cell Pb and data line D (1) is higher than the pixel electrode of pixel cell Pa and the electric field between data line D (1).So, can make that corresponding liquid crystal molecule rotational angle is bigger among the pixel cell Pb.Therefore, in the period, the brightness of pixel cell Pb is higher than the brightness of pixel cell Pa at first picture.And the brightness of other pixel cells of even pixel row 122 also is higher than other pixel cells of odd pixel column 121.
And at second picture in the period, source electrode driver carries out reversal of poles to the voltage that exports on data line D (1) and the D (2), that is this moment, data line transmitted a negative polarity pixel voltage and a positive polarity pixel voltage respectively.Therefore, liquid crystal capacitance Clca and Clcb store negative polarity and positive polarity pixel voltage respectively.So among the pixel cell Pa, the voltage of the pixel electrode of liquid crystal capacitance Clca and transistor T a is lower than among the pixel cell Pb, the voltage of the pixel electrode of transistor T b.
At this moment, because data line D (1) is the negative polarity pixel voltage, so the electric field between the pixel electrode of pixel cell Pb and data line D (1) is higher than the pixel electrode of pixel cell Pa and the electric field between data line D (1).So, can make that corresponding liquid crystal molecule rotational angle is bigger among the pixel cell Pb.Therefore, in the period, the brightness of pixel cell Pb is higher than the brightness of pixel cell Pa at second picture.And the brightness of other pixel cells of even pixel row 122 also is higher than other pixel cells of odd pixel column 121.
Can learn that by above-mentioned example the brightness of even pixel row 122 is permanent bright in odd pixel column 121.So, the even pixel row 122 in the display panels are permanent bright in odd pixel column 121, cause the picture of LCD 120 to produce the horizontal bright microgroove of a rule, influence picture quality.
Therefore, can be learnt by above-mentioned problem how to reduce the high flow rate power that the type of drive of a counter-rotating is derived, can solve the problem of the bright microgroove in the picture again, and the picture quality that is improved, be one of problem of endeavouring of industry.
Summary of the invention
The invention relates to a kind of display panels and driving method thereof, two switches of configuration in each pixel cell, liquid crystal capacitance by the voltage that drives opposed polarity in regular turn to pixel cell, to reach the display panels that a bit reverses, and can reduce consumed power, can avoid producing the bright microgroove of picture again, to reach the purpose of improving picture quality.
According to a first aspect of the invention, propose a kind of display panels, comprise one first sweep trace, one second sweep trace, one first data line, one second data line and one first pixel cell.First sweep trace is used to activation in the scanning period of one first picture in the period, and in one second picture period disabled, second sweep trace is used to the interior activation of scanning period in this second picture period, in this first picture period disabled.First data line is in order to transmit one first data-signal, second data line is in order to transmit one second data-signal, one of them is the positive polarity data voltage in the first picture period and the second picture period for first and second data-signal, and wherein another is the negative polarity data voltage in the first picture period and the second picture period.First pixel cell comprises first liquid crystal capacitance, first switch and second switch.First switch is controlled by first sweep trace, and when the first sweep trace activation, first switch is sent to first liquid crystal capacitance with first data-signal.Second switch is controlled by second sweep trace, and when the second sweep trace activation, second switch is sent to first liquid crystal capacitance with second data-signal.
According to a first aspect of the invention, propose a kind of LCD, comprise one first sweep trace, one second sweep trace, one first data line, one second data line, a gate drivers, one source pole driver and a display panels.Gate drivers is in order to respectively at one first picture in the scanning period in the period and one second picture activation first sweep trace and second sweep trace in the scanning period in the period.Source electrode driver, in order to export one first data-signal and one second data-signal to the first data line and second data line respectively, one of them is the positive polarity data voltage in the first picture period and the second picture period for first and second data-signal, and wherein another is the negative polarity data voltage in the first picture period and the second picture period.Display panels comprises one first pixel cell.First pixel cell comprises one first liquid crystal capacitance, one first switch and a second switch.First switch is controlled by first sweep trace, when the first sweep trace activation, first open relation is sent to first liquid crystal capacitance with first data-signal: second switch is controlled by second sweep trace, and when the second sweep trace activation, second switch is sent to first liquid crystal capacitance with second data-signal.
According to a first aspect of the invention, a kind of driving method is proposed, in order to drive a LCD.LCD comprises one first sweep trace, one second sweep trace, one first data line, one second data line and one first pixel cell, first pixel cell comprises one first switch, one second switch and one first liquid crystal capacitance, the control end of first and second switch couples first and second sweep trace respectively, first end of first and second switch couples first and second data line respectively, second end of first and second switch couples first liquid crystal capacitance, driving method comprises, at first, in one first picture activation first sweep trace in the scanning period in the period, with conducting first switch, see through first data line and transmit one first data-signal to the first liquid crystal capacitance.Afterwards, in one second picture activation second sweep trace in the scanning period in the period,, see through second data line and transmit one second data-signal to the first liquid crystal capacitance with the conducting second switch.One of them is the positive polarity data voltage for first and second data-signal, and wherein another is the negative polarity data voltage.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 illustrates the synoptic diagram that tradition is utilized the LCD of positive and negative pixel institute framework.
Fig. 2 illustrates the example according to the synoptic diagram of the LCD of first embodiment of the invention.
Fig. 3 illustrates the sequential chart of each sweep trace of gate drivers activation of Fig. 2.
Fig. 4 illustrates the example according to the synoptic diagram of the LCD of second embodiment of the invention.
Fig. 5 illustrates the sequential chart of each sweep trace of gate drivers activation of Fig. 4.
The main element symbol description:
100,200,400: LCD
120,220,420: display panels
121: odd pixel column
122: the even pixel row
240,440: gate drivers
240L, 440L: the first side gate driver circuit
240R, 440R: the second side gate driver circuit
260,460: source electrode driver
Clc1, Clc2, Clc3, Clc4, Clca, Clcb:: liquid crystal capacitance
D (1) is to D (M+1): data line
Tf1: the first picture period
Tf2: the second picture period
G (1) to G (N), GL (1) to GL (N), GR (1) is to GR (N): sweep trace
P1 to P4, P1 ' are to P4 ': pixel cell
Pa, Pb: pixel
T1 to T4, T1 ' are to T4 ', Ta, Tb: switch
Vcom: common voltage
Embodiment
The LCD of the embodiment of the invention comprises one first sweep trace, one second sweep trace, one first data line, one second data line, a gate drivers, one source pole driver and a display panels.Gate drivers is respectively at one first picture in the scanning period in the period and one second picture activation first sweep trace and second sweep trace in the scanning period in the period.Source electrode driver is exported one first data-signal and one second data-signal to the first data line and second data line respectively, one of them is the positive polarity data voltage in the first picture period and the second picture period for first and second data-signal, and wherein another is the negative polarity data voltage in the first picture period and the second picture period.Display panels comprises one first pixel cell.First pixel cell comprises a liquid crystal capacitance, one first switch and a second switch.First switch is controlled by first sweep trace.When the first sweep trace activation, first open relation is sent to liquid crystal capacitance with first data-signal.Second switch is controlled by second sweep trace.When the second sweep trace activation, second switch is sent to liquid crystal capacitance with second data-signal.The LCD of the embodiment of the invention now is described with two embodiment respectively.
First embodiment
Please refer to Fig. 2, it illustrates the example according to the synoptic diagram of the LCD of first embodiment of the invention.LCD 200 comprise sweep trace GL (1) to GL (N), GR (1) to GR (N), data line D (1) is to D (M+1), a display panels 220, a gate drivers 240 and one source pole driver 260.N, M are respectively a positive integer.
Display panels 220 comprises several pixel cells, for example is pixel cell P1 to P4.Pixel cell P1 and P3 system are positioned at odd pixel column, and pixel cell P2 and P4 are positioned at the even pixel row.Pixel cell P1 comprises a liquid crystal capacitance Clc1, switch T1 and T1 '.Pixel cell P2 comprises a liquid crystal capacitance Clc2, switch T2 and T2 '.Pixel cell P3 comprises a liquid crystal capacitance Clc3, switch T3 and T3 '.Pixel cell P4 comprises a liquid crystal capacitance Clc4, switch T4 and T4 '.
Switch T1 and T3 all are controlled by sweep trace GL (1).When gate drivers 240 activation sweep trace GL (1), switch T1 and T3 will be transmitted and the pixel voltage that comes is stored to liquid crystal capacitance Clc1 and Clc3 by data line D (1) and D (2) respectively.And switch T1 ' and T3 ' are controlled by sweep trace GR (1).When gate drivers 240 activation sweep trace GR (1), switch T1 ' and T3 ' will be transmitted and the pixel voltage that comes is stored to liquid crystal capacitance Clc1 and Clc3 by data line D (2) and D (3) respectively.
Similarly, switch T2 and T4 all are controlled by sweep trace GL (2).When gate drivers 240 activation sweep trace GL (2), switch T2 and T4 will be transmitted and the pixel voltage that comes is stored to liquid crystal capacitance Clc2 and Clc4 by data line D (1) and D (2) respectively.And switch T2 ' and T4 ' are controlled by sweep trace GR (2).When gate drivers 240 activation sweep trace GR (2), switch T2 ' and T4 ' will be transmitted and the pixel voltage that comes is stored to liquid crystal capacitance Clc2 and Clc4 by data line D (2) and D (3) respectively.
Source electrode driver 260 output cathode pixel voltages and negative polarity pixel voltage one of them to the odd data line, for example be D (1), D (3), and output cathode pixel voltage and negative polarity pixel voltage wherein another to the even data line, for example be D (2), D (4), and the pixel voltage polarity system of all data line outputs is maintained fixed, and does not change with image time.In the present embodiment, be to transmit the positive polarity pixel voltage, and even data line transmission negative polarity pixel voltage is an example with the odd data line.That is data line D (1) and D (3) transmit the positive polarity pixel voltage, and data line D (2) transmits the negative polarity pixel voltage with D (4), does not change with image time.
The action of the LCD of first embodiment now is described.Please be simultaneously with reference to Fig. 3, it illustrates the sequential chart of each sweep trace of gate drivers activation that is Fig. 2.LCD 200 shows a picture respectively in one first picture period Tf1 and one second picture period Tf2.
In continuous two scanning periods in the first picture period Tf1, gate drivers 240 is activation sweep trace GL (1) and GR (2) in regular turn.When sweep trace GL (1) activation, when promptly the voltage on the sweep trace GL (1) was positioned at high levels, other sweep traces were disabled, and promptly the voltage on other sweep traces is positioned at low level.During sweep trace GL (1) activation, switch T1 and T3 conducting in pixel cell P1 and the P3, respectively will by data line D (1) and D (2) transmit and positive polarity pixel voltage and negative polarity pixel voltage be stored to liquid crystal capacitance Clc1 and Clc3.
In addition, during sweep trace GL (1) activation, sweep trace GR (1) is a disabled.So switch T1 ' and T3 ' in pixel cell P1 and the P3 close.Therefore, switch T1 ' and T3 ' can be not respectively be stored to liquid crystal capacitance Clc1 and Clc3 with the pixel voltage of data line D (2) and D (3).Therefore, in the first picture period Tf1, the liquid crystal capacitance Clc1 of pixel cell P1 and P3 and Clc3 store positive polarity and negative polarity pixel voltage respectively.
Then, sweep trace GL (1) transfers disabled to, and sweep trace GR (2) transfers activation to.During sweep trace GR (2) activation, switch T2 ' and T4 ' conducting in pixel cell P2 and the P4 will be transmitted and the negative polarity pixel voltage and the positive polarity pixel voltage that come are stored to liquid crystal capacitance Clc2 and Clc4 by data line D (2) and D (3) respectively.
In addition, during sweep trace GR (2) activation, sweep trace GL (2) is a disabled.So switch T2 and T4 in pixel cell P2 and the P4 close.Therefore, switch T2 and T4 can be not respectively be stored to liquid crystal capacitance Clc2 and Clc4 with the pixel voltage of data line D (1) and D (2).Therefore, in the first picture period Tf1, the liquid crystal capacitance Clc2 of pixel cell P2 and P4 and Clc4 store negative polarity and positive polarity pixel voltage respectively.
In the first picture period Tf1, the activation of other sweep traces order is to above-mentioned similar.For instance, as shown in Figure 3, behind activation sweep trace GL (1) and GR (2) in regular turn, gate drivers 240 activation sweep trace GL (3) and GR (4) are with the pixel cell of activation correspondence respectively.
In continuous two scanning periods among the second picture period Tf2 after the first picture period Tf1, gate drivers 240 is activation sweep trace GR (1) and GL (2) in regular turn.Similarly, during sweep trace GR (1) activation, switch T1 ' and T3 ' conducting in switch pixel cell P1 and the P3 will be transmitted and the negative polarity pixel voltage and the positive polarity pixel voltage that come are stored to liquid crystal capacitance Clc1 and Clc3 by data line D (2) and D (3) respectively.And during this period, sweep trace GL (1) is a disabled, so switch T1 in pixel cell P1 and the P3 and T3 are for closing.Therefore, switch T1 and T3 can be not respectively be stored to liquid crystal capacitance Clc1 and Clc3 with the pixel voltage of data line D (1) and D (2).
Then, sweep trace GR (1) transfers disabled to, and sweep trace GL (2) transfers activation to.During sweep trace GL (2) activation, switch T2 and T4 conducting in pixel cell P2 and the P4, respectively will by data line D (1) and D (2) transmit and positive polarity pixel voltage and negative polarity pixel voltage be stored to liquid crystal capacitance Clc2 and Clc4.And during this period, sweep trace GR (2) is a disabled, so switch T2 ' in pixel cell P2 and the P4 and T4 ' are for closing.Therefore, switch T2 ' and T4 ' can be not respectively be stored to liquid crystal capacitance Clc2 and Clc4 with the pixel voltage of data line D (2) and D (3).
In the second picture period Tf2, the activation of other sweep traces order is to above-mentioned similar.For instance, as shown in Figure 3, behind activation sweep trace GR (1) and GL (2) in regular turn, gate drivers 240 activation sweep trace GR (3) and GL (4) are with the pixel cell of activation correspondence respectively.
This shows that a picture is in the period, a switch in each pixel cell can conducting, and another switch can cut out, make pixel cell receive positive polarity and negative polarity pixel voltage one of them.At next picture in the period, a switch in each pixel cell can cut out, and another switch can conducting, makes pixel cell receive wherein another of positive polarity and negative polarity pixel voltage.So in the first picture period Tf1, the polarity of pixel cell P1 to P4 is respectively positive polarity, negative polarity, negative polarity, positive polarity.In next picture period Tf2, the polarity of pixel cell P1 to P4 is converted to negative polarity, positive polarity, positive polarity, negative polarity respectively.Hence one can see that, and present embodiment is under this type of drive, and the pixel voltage on all data lines all need not change with the picture period, can still reach the effect by a counter-rotating.So, compared to the LCD of conventional point counter-rotating, the more power saving of the LCD of the embodiment of the invention, and the duration of charging of the liquid crystal capacitance of each pixel cell is longer.
In embodiments of the present invention, gate drivers 240 is a bilateral framework, comprises one first side gate driver circuit 240L and one second side gate driver circuit 240R.The first side gate driver circuit 240L is used for activation sweep trace GL (1) to GL (N), and the second side gate driver circuit 240R is used for activation sweep trace GR (1) to GR (N).In practical application, the gate drivers 240 of LCD 200 can also be monolateral framework.The gate drivers of monolateral framework be the sequential according to Fig. 3 come the above-mentioned 2N bar of activation in regular turn sweep trace GL (1) to GL (N), GR (1) to GR (N).
The LCD 200 of the above can reduce source electrode driver 260 required consumed power when driving display panels 220, now is described as follows.Under the conventional architectures of Fig. 1, if source electrode driver is in a picture in the period, output cathode pixel voltage to a data line, then next picture period promptly needs output negative pole pixel voltage data line so far.Every data line all can carry out reversal of poles in each picture period.And at the polarity chron that switches every data line, the very power consumption of the source electrode driver of conventional architectures system.
And in the present embodiment, each data line D (1) can reach a framework of counter-rotating display panels to D (M+1) all provides fixed polarity in arbitrary period voltage.That is to say that the described source electrode driver 260 of present embodiment does not need each bar data line is carried out the action of reversal of poles.Therefore, compared to the LCD 100 of traditional positive and negative pixel institute framework, the LCD 200 of present embodiment more can reduce required consumed power.
In addition, above-mentioned LCD 200 can be removed the bright microgroove that conventional liquid crystal produces, and improves picture quality.Now be example with pixel P1 among Fig. 2 and P2, illustrate as after.Suppose that common voltage Vcom is 6V, then the positive polarity pixel voltage is greater than 6V, and the negative polarity pixel voltage is less than 6V.Voltage perseverance on the data line D (1) is the positive polarity pixel voltage.
In the first picture period Tf1, suppose that the liquid crystal capacitance Clc1 of pixel P1 and P2 and Clc2 have stored a positive polarity and a negative polarity pixel voltage respectively, for example be 10V and 2V.That is in pixel cell P1, the voltage of the pixel electrode of switch T1 and T1 ' is 10V; And in pixel cell P2, the voltage of the pixel electrode of switch T2 and T2 ' is 2V.At this moment, if the positive polarity pixel voltage on the data line D (1) is 12V, then the pixel electrode of data line D (1) and pixel cell P2 between electric field be 10V (12-2), be 2V (12-10) greater than the electric field between the pixel electrode of data line D (1) and pixel cell P1.Therefore, in pixel cell P2, the angle that corresponding liquid crystal molecule rotates is bigger.Therefore, in picture period Tf1, the brightness meeting of pixel cell P2 is higher than pixel cell P1.
From the above, because when picture period Tf1, pixel cell P2 in the even pixel row stores the negative polarity pixel voltage, and the odd data line D (1) adjacent with pixel cell P2 in the even pixel row transmits the positive polarity pixel voltage, therefore, in the pixel cell of even pixel row, the electric field between data line D (1) and the pixel electrode can be higher than in the pixel cell of odd pixel column, the electric field between data line D (1) and the pixel electrode.Therefore, by that analogy, other brightness meetings that are positioned at the pixel of even pixel row are higher than the brightness of the pixel that is positioned at odd pixel column.So in picture period Tf1, the even pixel of display panels 220 row can be brighter in odd pixel column.
In picture period Tf2, the liquid crystal capacitance Clc1 of pixel P1 and P2 and Clc2 store a negative polarity and a positive polarity pixel voltage respectively, suppose it is 2V and 10V, and the pixel voltage of data line D (1) are assumed to be 12V.So the electric field between the pixel electrode of data line D (1) and pixel cell P2 is 2V (12-10), and the electric field between the pixel electrode of data line D (1) and pixel cell P1 is 10V (12-2).Therefore, the electric field of pixel cell P1 is higher than the electric field of pixel cell P2.So in picture period Tf2, the brightness of pixel P1 is higher than pixel P2.In like manner, in picture period Tf2, the brightness of the odd pixel column of display panels 220 system is higher than the brightness of even pixel row.
Can learn that thus in the first picture period Tf1, the even pixel row are bright in odd pixel column.And in next picture period Tf2, odd pixel column is bright to be listed as in even pixel.Because the picture period is very of short duration, under the effect of persistence of vision, it is different with the brightness of even pixel row that human eye can't be experienced odd pixel column.Therefore, the user can experience LCD of the present invention and has uniform brightness.That compares is following, and in the conventional liquid crystal of Fig. 1, the even pixel row are permanent bright in odd pixel column, and produce the bright microgroove of a rule level.Therefore, the LCD of the embodiment of the invention has solved the problem that picture in the tradition produces the horizontal bright microgroove of a rule effectively.
Moreover, because in the embodiment of the invention, every data line all transmits the pixel voltage of identical polar, so the LCD of the embodiment of the invention can effectively reduce the cross-talk phenomenon.Thus, can reach the purpose of improving picture quality.
Second embodiment
Please refer to Fig. 4, it illustrates the example according to the synoptic diagram of the LCD 400 of second embodiment of the invention.Similarly, among second embodiment, with the pixel cell P1 ' of the display panels 420 of LCD 400 to P4 ' be the action that example illustrates each pixel cell in the display panels 420.Different with first embodiment is when switch T2 among pixel cell P2 ' and the P4 ' and T4 lie in sweep trace GL (2) activation, the pixel voltage on data line D (2) and the D (3) to be stored to liquid crystal capacitance Clc2 and Clc4.And switch T2 ' and T4 ' when being enabled, make data line D (1) and D (2) pixel voltage be stored to liquid crystal capacitance Clc2 and Clc4 in sweep trace GR (2) respectively.
Below cooperate a sequential chart that the type of drive of the LCD 400 of present embodiment is done explanation.Please be simultaneously with reference to Fig. 5, it illustrates the sequential chart of gate drivers 440 each sweep trace of activation that are Fig. 4.
In continuous two scanning periods in the first picture period Tf1, gate drivers 440 is activation sweep trace GL (1) and GL (2) in regular turn.Pixel cell P1 and the P3 of similar first embodiment, during sweep trace GL (1) activation, sweep trace GR (1) is a disabled.So switch T1 and T3 conducting in pixel cell P1 ' and the P3 ', switch T1 ' and T3 ' close.So with first embodiment in the same manner, in the first picture period Tf1, the liquid crystal capacitance Clc1 of pixel cell P1 ' and P3 ' and Clc3 store respectively by data line D (1) and D (2) and transmit and come positive polarity and negative polarity pixel voltage.
Then, sweep trace GL (1) transfers disabled to, and sweep trace GL (2) transfers activation to.During sweep trace GL (2) activation, sweep trace GR (2) also is a disabled.Switch T2 and T4 conducting in pixel cell P2 ' and the P4 ', switch T2 ' and T4 ' close.So and first embodiment in the same manner, negative polarity pixel voltage and positive polarity pixel voltage on data line D (2) and the D (3) are transferred into liquid crystal capacitance Clc2 and Clc4 respectively.
In the first picture period Tf1, the activation of other sweep traces order is to above-mentioned similar.For instance, among Fig. 5, behind activation sweep trace GL (1) and GL (2) in regular turn, gate drivers 440 activation sweep trace GL (3) and GL (4) are with the pixel cell of activation correspondence respectively.
Then, in the second picture period Tf2 continuous two scanning the periods in, gate drivers 440 is activation sweep trace GR (1) and GR (2) in regular turn.Similarly, during sweep trace GR (1) activation, switch T1 ' and T3 ' conducting in switch pixel cell P1 ' and the P3 ', switch T1 and T3 close.So negative polarity pixel voltage on data line D (2) and the D (3) and positive polarity pixel voltage system are stored to liquid crystal capacitance Clc1 and Clc3 respectively.
Then, sweep trace GR (1) transfers disabled to, and sweep trace GR (2) transfers activation to.During sweep trace GR (2) activation, switch T2 ' and T4 ' conducting in pixel cell P2 ' and the P4 ', switch T2 and T4 close.So positive polarity pixel voltage on data line D (1) and the D (2) and negative polarity pixel voltage system are stored to liquid crystal capacitance Clc2 and Clc4 respectively.
In the second picture period Tf2, the activation of other sweep traces is to above-mentioned similar in proper order.For instance, as shown in Figure 5, behind activation sweep trace GR (1) and GR (2) in regular turn, gate drivers 440 is activation sweep trace GR (3) and GR (4) in regular turn, with the pixel cell of activation correspondence respectively.
Similarly, gate drivers 440 can be monolateral framework or bilateral framework.In a second embodiment, gate drivers 440 is bilateral framework, comprises the first side gate driver circuit 440L and the second side gate driver circuit 440R.
With first embodiment in the same manner, pixel cell P1 ' to the polarity of P4 ' be to carry out reversal of poles in the period in a picture.But the pixel voltage on all data lines all need not change with the picture period, therefore, under this type of drive, also can reach by a LCD 400 of counter-rotating display panels institute framework.
With first embodiment in the same manner, the LCD of present embodiment has the effect that reduces source electrode driver required consumed power when driving display panels equally.In addition, the LCD of present embodiment can solve the problem that conventional liquid crystal has level light microgroove equally, and reduces the effect of cross-talk phenomenon.Its reason in preceding detailed description, repeats no more in this.
Among first and second embodiment, be to transmit the positive polarity pixel voltage with the odd data line, it is example that the even data line transmits the negative polarity pixel voltage.So in fact, odd data line and even data line can transmit negative polarity and positive polarity pixel voltage respectively.
In the disclosed LCD of the above embodiment of the present invention, source electrode driver only need be exported the pixel voltage of fixed polarity to every data line, can carry out a counter-rotating.So the described source electrode driver of embodiments of the invention does not need the signal that every data line transmits is carried out the action of polar switching, so can reduce energy consumption.Simultaneously, the problem of the LCD of the embodiment of the invention temperature overheating that also solved the conventional source driver and cause because switch the polarity of pixel voltage continually.In addition, in the LCD of the embodiment of the invention, bigger electric field is that alternately appears between the pixel cell and adjacent data line of odd pixel column and even pixel row.Therefore, the LCD of the embodiment of the invention picture that can solve conventional liquid crystal produces the problem of the horizontal bright microgroove of a rule.In addition, because in the embodiment of the invention, every data line all transmits the pixel voltage of identical polar, so the LCD of the embodiment of the invention can effectively reduce the cross-talk phenomenon.So can reach the purpose of improving picture quality.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (17)
1. display panels comprises:
One first sweep trace is used to activation in the scanning period of one first picture in the period, in one second picture disabled in the period;
One second sweep trace is used to activation in the scanning period in this second picture period, disabled in this first picture period;
One first data line is in order to transmit one first data-signal;
One second data line, in order to transmit one second data-signal, one of them is all the positive polarity data voltage in this first picture period and this second picture period this first and second data-signal, and wherein another is all the negative polarity data voltage in this first picture period and this second picture period; And
One first pixel cell comprises:
One first liquid crystal capacitance;
One first switch is controlled by this first sweep trace, and when this first sweep trace activation, this is first years old
Switch is sent to this first liquid crystal capacitance with this first data-signal; And
One second switch is controlled by this second sweep trace, and when this second sweep trace activation, this is second years old
Switch is sent to this first liquid crystal capacitance with this second data-signal.
2. display panels as claimed in claim 1 is characterized in that, this display panels also comprises:
One three scan line is used to activation in the scanning period in this second picture period, disabled in this first picture period;
One the 4th sweep trace, activation in the scanning period in being used in this first picture period, disabled in this second picture period; And
One second pixel cell comprises:
One second liquid crystal capacitance;
One the 3rd switch is controlled by this three scan line, when this three scan line activation, and the 3rd
Switch is sent to this second liquid crystal capacitance with this first data-signal; And
One the 4th switch is controlled by the 4th sweep trace, when the 4th sweep trace activation, and the 4th
Switch is sent to this second liquid crystal capacitance with this second data-signal.
3. display panels as claimed in claim 2 is characterized in that this display panels also comprises:
One the 3rd data line is in order to transmit one the 3rd data-signal;
One the 3rd pixel cell comprises:
One the 3rd liquid crystal capacitance;
One the 5th switch is controlled by this first sweep trace, and when this first sweep trace activation, the 5th switch is sent to the 3rd liquid crystal capacitance with this second data-signal; And
One the 6th switch is controlled by this second sweep trace, and when this second sweep trace activation, the 6th switch is sent to the 3rd liquid crystal capacitance with the 3rd data-signal; And
One the 4th pixel cell comprises:
One the 4th liquid crystal capacitance;
One minion is closed, and is controlled by this three scan line, and when this three scan line activation, this minion is closed this second data-signal is sent to the 4th liquid crystal capacitance; And
One octavo is closed, and is controlled by the 4th sweep trace, and when the 4th sweep trace activation, this octavo is closed the 3rd data-signal is sent to the 4th liquid crystal capacitance;
Wherein, this is first opposite with the polarity of this second data-signal, and this is first identical with the polarity of the 3rd data-signal.
4. display panels as claimed in claim 1 is characterized in that this display panels also comprises:
One three scan line is used to activation in the scanning period in this first picture period, disabled in this second picture period;
One the 4th sweep trace is used to activation in the scanning period in this second picture period, disabled in this first picture period; And
One second pixel cell comprises:
One second liquid crystal capacitance;
One the 3rd switch is controlled by this three scan line, and when this three scan line activation, the 3rd switch is sent to this second liquid crystal capacitance with this second data-signal; And
One the 4th switch is controlled by the 4th sweep trace, and when the 4th sweep trace activation, the 4th switch is sent to this second liquid crystal capacitance with this first data-signal.
5. display panels as claimed in claim 4 is characterized in that, this display panels also comprises:
One the 3rd data line is in order to transmit one the 3rd data-signal;
One the 3rd pixel cell comprises:
One the 3rd liquid crystal capacitance;
One the 5th switch is controlled by this first sweep trace, and when this first sweep trace activation, the 5th switch is sent to the 3rd liquid crystal capacitance with this second data-signal; And
One the 6th switch is controlled by this second sweep trace, and when this second sweep trace activation, the 6th switch is sent to the 3rd liquid crystal capacitance with the 3rd data-signal; And
One the 4th pixel cell comprises:
One the 4th liquid crystal capacitance;
One minion is closed, and is controlled by this three scan line, and when this three scan line activation, this minion is closed the 3rd data-signal is sent to the 4th liquid crystal capacitance; And
One octavo is closed, and is controlled by the 4th sweep trace, and when the 4th sweep trace activation, this octavo is closed this second data-signal is sent to the 4th liquid crystal capacitance;
Wherein, this is first opposite with the polarity of this second data-signal, and this is first identical with the polarity of the 3rd data-signal.
6. LCD comprises:
One first sweep trace;
One second sweep trace;
One first data line;
One second data line;
One gate drivers is in order to respectively at one first picture in the scanning period in the period and one second picture this first sweep trace of activation and this second sweep trace in the scanning period in the period;
The one source pole driver, in order to export one first data-signal and one second data-signal respectively to this first data line and this second data line, one of them is all the positive polarity data voltage in this first picture period and this second picture period this first and second data-signal, and wherein another is all the negative polarity data voltage in this first picture period and this second picture period; And
One display panels comprises:
One first pixel cell comprises:
One first liquid crystal capacitance;
One first switch is controlled by this first sweep trace, and when this first sweep trace activation, this first switch is that this first data-signal is sent to this first liquid crystal capacitance; And
One second switch is controlled by this second sweep trace, and when this second sweep trace activation, this second switch is sent to this first liquid crystal capacitance with this second data-signal.
7. LCD as claimed in claim 6 is characterized in that, this LCD also comprises:
One three scan line and one the 4th sweep trace, this gate drivers in order to respectively in the scanning period in this second picture period and this first picture period in the scanning period in this three scan line of activation and the 4th sweep trace; And
One second pixel cell comprises:
One second liquid crystal capacitance;
One the 3rd switch is controlled by this three scan line, and when this three scan line activation, the 3rd switch is sent to this second liquid crystal capacitance with this first data-signal; And
One the 4th switch is controlled by the 4th sweep trace, and when the 4th sweep trace activation, the 4th switch is sent to this second liquid crystal capacitance with this second data-signal.
8. LCD as claimed in claim 7 is characterized in that, this LCD also comprises:
One the 3rd data line, this source electrode driver is in order to export one the 3rd data-signal to the 3rd data line;
One the 3rd pixel cell comprises:
One the 3rd liquid crystal capacitance;
One the 5th switch is controlled by this first sweep trace, and when this first sweep trace activation, the 5th switch is sent to the 3rd liquid crystal capacitance with this second data-signal; And
One the 6th switch is controlled by this second sweep trace, and when this second sweep trace activation, the 6th switch is sent to the 3rd liquid crystal capacitance with the 3rd data-signal; And
One the 4th pixel cell comprises:
One the 4th liquid crystal capacitance;
One minion is closed, and is controlled by this three scan line, and when this three scan line activation, this minion is closed this second data-signal is sent to the 4th liquid crystal capacitance; And
One octavo is closed, and is controlled by the 4th sweep trace, and when the 4th sweep trace activation, this octavo is closed the 3rd data-signal is sent to the 4th liquid crystal capacitance;
Wherein, this is first opposite with the polarity of this second data-signal, and this is first identical with the polarity of the 3rd data-signal.
9. LCD as claimed in claim 7, it is characterized in that, this gate drivers comprises one first side gate driver circuit and one second side gate driver circuit, this first side gate driver circuit is in order to this first sweep trace of activation and this three scan line, and this second side gate driver circuit is in order to this second sweep trace of activation and the 4th sweep trace.
10. LCD as claimed in claim 6 is characterized in that, this LCD also comprises:
One three scan line and one the 4th sweep trace, this gate drivers in order to respectively in the scanning period in this first picture period and this second picture period in the scanning period in this three scan line of activation and the 4th sweep trace; And
One second pixel cell comprises:
One second liquid crystal capacitance;
One the 3rd switch is controlled by this three scan line, and when this three scan line activation, the 3rd switch is that this second data-signal is sent to this second liquid crystal capacitance; And
One the 4th switch is controlled by the 4th sweep trace, and when the 4th sweep trace activation, the 4th switch is that this first data-signal is sent to this second liquid crystal capacitance.
11. LCD as claimed in claim 10 is characterized in that, this LCD also comprises:
One the 3rd data line, this source electrode driver is in order to export one the 3rd data-signal to the 3rd data line;
One the 3rd pixel cell comprises:
One the 3rd liquid crystal capacitance;
One the 5th switch is controlled by this first sweep trace, and when this first sweep trace activation, the 5th switch is sent to the 3rd liquid crystal capacitance with this second data-signal; And
One the 6th switch is controlled by this second sweep trace, and when this second sweep trace activation, the 6th switch is sent to the 3rd liquid crystal capacitance with the 3rd data-signal; And
One the 4th pixel cell comprises:
One the 4th liquid crystal capacitance;
One minion is closed, and is controlled by this three scan line, and when this three scan line activation, this minion is closed the 3rd data-signal is sent to the 3rd liquid crystal capacitance; And
One octavo is closed, and is controlled by the 4th sweep trace, and when the 4th sweep trace activation, this octavo is closed this second data-signal is sent to the 3rd liquid crystal capacitance;
Wherein, this is first opposite with the polarity of this second data-signal, and this is first identical with the polarity of the 3rd data-signal.
12. LCD as claimed in claim 10, it is characterized in that, this gate drivers comprises one first side gate driver circuit and one second side gate driver circuit, this first side gate driver circuit is in order to this first sweep trace of activation and this three scan line, and this second side gate driver circuit is in order to this second sweep trace of activation and the 4th sweep trace.
13. LCD as claimed in claim 12, it is characterized in that, this first side gate driver circuit is used to this first sweep trace of activation in regular turn and this three scan line in scanning period in this first picture period, and this second side gate driver circuit is used to this second sweep trace of activation in regular turn and the 4th sweep trace in scanning period in this second picture period.
14. LCD as claimed in claim 12, it is characterized in that, this first side gate driver circuit is used to interior this first sweep trace of activation of scanning period in this first picture period, and this three scan line of activation in the scanning period in this second picture period, this second side gate driver circuit is used to this second sweep trace of activation in scanning period in this second picture period, and in the scanning period of this first picture period activation the 4th sweep trace.
15. driving method, in order to drive a LCD, this LCD comprises one first sweep trace, one second sweep trace, one first data line, one second data line and one first pixel cell, this first pixel cell comprises one first switch, one second switch and one first liquid crystal capacitance, the control end of this first and second switch couples this first and second sweep trace respectively, first end of this first and second switch couple respectively this first with this second data line, second end of this first and second switch couples this first liquid crystal capacitance, and this driving method comprises:
(a),, see through this first data line and transmit one first data-signal to this first liquid crystal capacitance with this first switch of conducting in one first picture this first sweep trace of activation in the scanning period in the period; And
(b),, see through this second data line and transmit one second data-signal to this first liquid crystal capacitance with this second switch of conducting in one second picture this second sweep trace of activation in the scanning period in the period;
Wherein, one of them is all the positive polarity data voltage in this first picture period and this second picture period this first and second data-signal, and wherein another is all the negative polarity data voltage in this first picture period and this second picture period.
16. driving method as claimed in claim 15, it is characterized in that, this LCD also comprises a three scan line, one the 4th sweep trace, one second pixel cell, this second pixel cell more comprises one the 3rd switch, one the 4th switch and one second liquid crystal capacitance, the control end of the 3rd and the 4th switch couples the 3rd and the 4th sweep trace respectively, first end of the 3rd and the 4th switch couple respectively this first with this second data line, second end of the 3rd and the 4th switch couples this second liquid crystal capacitance, wherein, in step (a) and (b), this driving method also comprises:
(a1) activation the 4th sweep trace in the scanning period in this first picture period with conducting the 4th switch, sees through this second data line and transmits this second data-signal to this second liquid crystal capacitance; And
Wherein, in step (b) afterwards, this driving method also comprises:
(b1) this three scan line of activation in the scanning period in this second picture period with conducting the 3rd switch, sees through this first data line and transmits this first data-signal to this second storage unit.
17. driving method as claimed in claim 16, it is characterized in that, this LCD also comprises a three scan line, one the 4th sweep trace, one second pixel cell, this second pixel cell also comprises one the 3rd switch, one the 4th switch and one second liquid crystal capacitance, the control end of the 3rd and the 4th switch couples the 3rd and the 4th sweep trace respectively, first end of the 3rd and the 4th switch couple respectively this second with this first data line, second end of the 3rd and the 4th switch couples this second liquid crystal capacitance, wherein, in step (a) and (b), this driving method also comprises:
(a1) activation the 4th sweep trace in the scanning period in this first picture period with conducting the 4th switch, sees through this first data line and transmits this first data-signal to this second liquid crystal capacitance; And
Wherein, in step (b) afterwards, this driving method also comprises:
(b1) activation the 3rd switch in the scanning period in this second picture period with conducting the 3rd switch, sees through this second data line and transmits this second data-signal to this second storage unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102136443A CN101655642B (en) | 2008-08-19 | 2008-08-19 | Liquid crystal display panel and method for driving same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102136443A CN101655642B (en) | 2008-08-19 | 2008-08-19 | Liquid crystal display panel and method for driving same |
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| CN101655642A true CN101655642A (en) | 2010-02-24 |
| CN101655642B CN101655642B (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102136443A Expired - Fee Related CN101655642B (en) | 2008-08-19 | 2008-08-19 | Liquid crystal display panel and method for driving same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102982741A (en) * | 2012-12-10 | 2013-03-20 | 京东方科技集团股份有限公司 | Array substrate, and 3D display device and drive method thereof |
| CN103150988A (en) * | 2012-10-24 | 2013-06-12 | 友达光电股份有限公司 | Display panel and driving method thereof |
| CN103310846A (en) * | 2012-03-08 | 2013-09-18 | 乐金显示有限公司 | Gate driver and image display device including the same |
| CN103514842A (en) * | 2012-06-26 | 2014-01-15 | 奇景光电股份有限公司 | Image display |
| TWI463469B (en) * | 2012-05-31 | 2014-12-01 | Himax Tech Ltd | Image display |
| WO2017041318A1 (en) * | 2015-09-09 | 2017-03-16 | 深圳市华星光电技术有限公司 | Driving apparatus and liquid crystal display apparatus |
| CN108428426A (en) * | 2017-02-13 | 2018-08-21 | 群创光电股份有限公司 | Display panel and display device |
| CN110718196A (en) * | 2018-07-11 | 2020-01-21 | 咸阳彩虹光电科技有限公司 | Bootstrap circuit for pixel display and display panel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6914644B2 (en) * | 1999-12-24 | 2005-07-05 | Matsushita Electric Industrial Co., Ltd. | Liquid crystal device |
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2008
- 2008-08-19 CN CN2008102136443A patent/CN101655642B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103310846A (en) * | 2012-03-08 | 2013-09-18 | 乐金显示有限公司 | Gate driver and image display device including the same |
| US10586497B2 (en) | 2012-03-08 | 2020-03-10 | Lg Display Co., Ltd. | Gate driver and image display device including the same |
| TWI463469B (en) * | 2012-05-31 | 2014-12-01 | Himax Tech Ltd | Image display |
| CN103514842A (en) * | 2012-06-26 | 2014-01-15 | 奇景光电股份有限公司 | Image display |
| CN103514842B (en) * | 2012-06-26 | 2015-08-05 | 奇景光电股份有限公司 | Image display |
| CN103150988A (en) * | 2012-10-24 | 2013-06-12 | 友达光电股份有限公司 | Display panel and driving method thereof |
| CN103150988B (en) * | 2012-10-24 | 2015-08-12 | 友达光电股份有限公司 | Display panel and driving method thereof |
| CN102982741A (en) * | 2012-12-10 | 2013-03-20 | 京东方科技集团股份有限公司 | Array substrate, and 3D display device and drive method thereof |
| WO2017041318A1 (en) * | 2015-09-09 | 2017-03-16 | 深圳市华星光电技术有限公司 | Driving apparatus and liquid crystal display apparatus |
| CN108428426A (en) * | 2017-02-13 | 2018-08-21 | 群创光电股份有限公司 | Display panel and display device |
| CN110718196A (en) * | 2018-07-11 | 2020-01-21 | 咸阳彩虹光电科技有限公司 | Bootstrap circuit for pixel display and display panel |
| CN110718196B (en) * | 2018-07-11 | 2021-06-08 | 咸阳彩虹光电科技有限公司 | Bootstrap circuit for pixel display and display panel |
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| CN101655642B (en) | 2012-11-21 |
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