CN101587689B - Drive circuit of pixel cell and drive method thereof - Google Patents
Drive circuit of pixel cell and drive method thereof Download PDFInfo
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- CN101587689B CN101587689B CN2008100985385A CN200810098538A CN101587689B CN 101587689 B CN101587689 B CN 101587689B CN 2008100985385 A CN2008100985385 A CN 2008100985385A CN 200810098538 A CN200810098538 A CN 200810098538A CN 101587689 B CN101587689 B CN 101587689B
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Abstract
The invention relates to a drive circuit of a pixel cell and a drive method thereof. The drive circuit of the pixel cell comprises a first writable switch, a second writable switch, a first memory cell, a second memory cell, a first displayable switch, a second displayable switch and pixel electrodes, wherein the first memory cell and the second memory cell respectively receive and store a first pixel signal and a second pixel signal through the first writable switch and the second writable switch; wherein the first writable switch and the second writable switch are controlled by scanning control signals to decide conduction or not; and the first displayable switch and the second displayable switch are respectively coupled among the first memory cell, the second memory cell and the pixel electrodes. In a frame period, through the switchover of the first displayable switch and the second displayable switch, the first pixel signal and the second pixel signal which are stored in the firstmemory cell and the second memory cell are sequentially transmitted to the pixel electrodes so that corresponding pixel data is displayed. Thus, the frame rate can be effectively improved without an additional frame buffer to store the pixel signals.
Description
Technical field
The invention relates to a kind of pixel cell, and particularly about a kind of driving circuit and driving method thereof of pixel cell.
Background technology
The driving method of LCD is controlled the anglec of rotation of liquid crystal for through changing the voltage at liquid crystal layer two ends, and then changes the polarised direction of light.The liquid crystal layer two ends couple pixel electrode and common electrode respectively, and the voltage on the pixel electrode changes with picture element signal, and common electrode then couples common voltage.According to the direction of an electric field that is applied to liquid crystal layer, the driving method of LCD can be divided into the positive polarity driving and negative polarity drives.When the voltage of pixel electrode is higher than common voltage, then is referred to as positive polarity and drives, and when the voltage of pixel electrode is lower than common voltage, then is referred to as negative polarity and drives.
The liquid crystal layer two ends are applied the same voltage difference of different electric field direction, can not influence the transmittance of liquid crystal.The direction of an electric field of liquid crystal layer is permanent can't to rotate in response to electric field change just get off for a long time to make the liquid crystal quality badness for negative for just perhaps permanent swimmingly if put on, and this phenomenon is referred to as the liquid crystal polarization.Phenomenon for fear of liquid crystal polarization takes place, and must drive liquid crystal at the voltage that different time is used alternatingly opposed polarity, and just the mode with " reversal of poles " drives.The mode of general reversal of poles has frame counter-rotating (frame inversion), some counter-rotating (dot inversion) and line counter-rotating (line inversion).
As far as the frame counter-rotating, the liquid crystal of same frame period interior pixel array drives for the voltage with identical polar, and two successive frame cycles, the liquid crystal of pel array drives for the voltage with opposed polarity.Because be unit the switching time of reversal of poles with the frame period, thus the comparatively power saving of driving method of frame counter-rotating, and be applicable to portable electronic equipment, for example: mobile phone or personal digital assistant (Personal DigitalAssistant, PDA).Yet when asymmetric or slewing rate was fast inadequately when the driving voltage of reversal of poles, human eye just can be perceived film flicker.In order to address the above problem, generally can adopt frame buffer (frame buffer) to come storage pixel signal in advance, to improve frame per second, still also relatively improve the manufacturing cost of LCD.
Summary of the invention
The present invention proposes a kind of driving circuit of pixel cell and the driving method of pixel cell, and it is stored in the pixels with different signal respectively among the storage unit, and through the switching of switch picture element signal is sent to pixel electrode, with the display pixel data.Thus, need not additional frame buffer and come the storage pixel signal, just can improve frame per second effectively, and avoid the situation of film flicker to take place.
The present invention provides a kind of driving circuit of pixel cell, but but comprises first and second write switch, first and second storage unit, first and second display switch, reset switch and pixel electrode.But the control end of first and second write switch receives scan control signal; But first end of first and second write switch couples first and second data line respectively, but and second end of first and second write switch couple first end of first and second storage unit respectively.And second end of first and second storage unit couples reference voltage.But first and second storage unit receives first and second picture element signal via first and second write switch respectively.But the control end of first and second display switch receives first and second display control signal respectively; But first end of first and second display switch couples first end of first and second storage unit respectively, but and second end of first and second display switch couple pixel electrode.But pixel electrode receives first and second picture element signal in a frame period respectively via first and second display switch.The control end of reset switch receives a reset signal; But but first end of reset switch couples second end of this first display switch and second end of this second display switch; Second end of reset switch couples a reset voltage; In order to before this first display switch and this second display switch conducting, this pixel electrode of resetting.
On the other hand, the present invention provides a kind of driving method of pixel cell.At first, according to scan control signal, transmit first picture element signal to the first storage unit, and transmit second picture element signal to the second storage unit from second data line from first data line.Then,, respectively first storage unit and second storage unit are coupled to pixel electrode, to show first picture element signal and second picture element signal in a frame period according to display control signal.And, before this display control signal enables, electrically connect this pixel electrode to one reset voltage, with this pixel electrode of resetting according to a reset signal.
The present invention provides a kind of driving circuit of pixel cell in addition, but but comprises first, second and third write switch, first, second and third storage unit and first, second and third display switch, reset switch and pixel electrode.But the control end of first, second and third write switch receives scan control signal; But first end of first, second and third write switch couples first, second and third data line respectively, but and second end of first, second and third write switch couple first end of first, second and third storage unit respectively.And second end of first, second and third storage unit couples reference voltage.But first, second and third storage unit receives first, second and third picture element signal via first, second and third write switch respectively.But the control end of first, second and third display switch receives first, second and third display control signal respectively; But first end of first, second and third display switch couples first end of first, second and third storage unit respectively, but and second end of first, second and third display switch couple pixel electrode.But pixel electrode receives first, second and third picture element signal in a frame period respectively via first, second and third display switch.The control end of reset switch receives a reset signal; But but but first end of reset switch couples second end of this first display switch, second end of this second display switch and second end of the 3rd display switch; Second end of reset switch couples a reset voltage; In order to before this first display switch, this second display switch and the 3rd display switch conducting, this pixel electrode of resetting.
The present invention adopts a plurality of storage unit to store the pixels with different signal, but the switching through display switch is sent to pixel electrode in order with the pixels with different signal, to show corresponding pixel data.The present invention is applied to the driving circuit of reversal of poles, and then above-mentioned pixels with different signal just is opposite polarity picture element signal.Therefore, in the same frame period, can show the picture element signal of opposed polarity, with the frame per second of raising demonstration, and the generation probability that reduces film flicker.The present invention also can be applicable to the driving circuit of look preface method, and then above-mentioned pixels with different signal just is the picture element signal of different colours, and the picture element signal that transmits different colours in order in the same frame period thus is to pixel electrode.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts preferred embodiment, and cooperates appended graphicly, elaborates as follows.
Description of drawings
Fig. 1 is the circuit diagram of the driving circuit of one embodiment of the invention pixel cell;
Fig. 2 is the sequential chart of the driving circuit of pixel cell among embodiment of the invention Fig. 1;
Fig. 3 is the circuit diagram of the driving circuit of one embodiment of the invention pixel cell;
Fig. 4 is the sequential chart of the driving circuit of pixel cell among embodiment of the invention Fig. 3;
Fig. 5 is the circuit diagram of the driving circuit of one embodiment of the invention pixel cell.
Description of reference numerals
110,300,500: the driving circuit of pixel cell
510,520,530: sub-driver element
T11～T12, T31～T33, T51～T52: but write switch
S11～S12, S31～33, S51～S52: but display switch
RS1, RS3, RS5: reset switch
C11～C12, C31～C33, C51～C52: storage unit
CLC: liquid crystal capacitance
Pi: pixel electrode
COM: common electrode
VREF: reference voltage
VRST: reset voltage
D11～D12, D31～D33, D51～D56: data line
Scan1, Scan3, Scan5: scan control signal
F11～F12, F31～F32, F51～F56: display control signal
RST1, RST3, RST5: reset signal
Embodiment
Fig. 1 is the circuit diagram of the driving circuit of one embodiment of the invention pixel cell.Please with reference to Fig. 1, but but the driving circuit 110 of pixel cell comprises write switch T11～T12 display switch S11～S12, storage unit C11～C12, reset switch RS1 and pixel electrode Pi.Wherein, liquid crystal layer is represented with liquid crystal capacitance CLC, and the two ends of liquid crystal capacitance CLC couple pixel electrode Pi and common electrode COM respectively.In the present embodiment, but but write switch T11～T12 display switch S11～S12 and reset switch RS1 for example are transistor or other semiconductor switching devices, and storage unit C11～C12 for example is an electric capacity.
But first end of write switch T11 and second end couple first end of data line D11 and storage unit C11 respectively, but and the control end of write switch T11 receive scan control signal Scan1, but with whether conducting of control write switch T11.But first end of write switch T12 and second end couple first end of data line D12 and storage unit C12 respectively, but and the control end of write switch T12 also receive scan control signal Scan1, but with whether conducting of control write switch T12.Wherein, second end of storage unit C11～C12 couples reference voltage VREF.
But first end of display switch S11 and second end couple first end and the pixel electrode Pi of storage unit C11 respectively, but and the control end of display switch S11 receive display control signal F11, but with whether conducting of control display switch S11.But first end of display switch S12 and second end couple first end and the pixel electrode Pi of storage unit C12 respectively, but and the control end of display switch S12 receive display control signal F12, but with whether conducting of control display switch S12.First end of reset switch RS1 and second end couple pixel electrode Pi and reset voltage VRST respectively, and the control end of reset switch RS1 receives reset signal RST1 with whether conducting of control reset switch RS1.
Type of drive as far as reversal of poles; Each pixel cell must alternately drive with the voltage of opposed polarity at different time; Phenomenon to avoid the liquid crystal polarization takes place, and for example during different cycles, alternately bestows pixel cell with the opposite driving voltage of positive-negative polarity.The driving voltage of opposite polarity is the unit interval to do switching usually with the frame period, and for example at present frame in the cycle, pixel cell drives with positive polarity voltage, and then the next frame cycle, pixel cell just drives with reverse voltage.Following matching timing figure explains the running of present embodiment, drives with the reversal of poles that realizes high frame per second.
Fig. 2 is the sequential chart of the driving circuit of pixel cell among embodiment of the invention Fig. 1.For the ease of narration, positive polarity that pixel electrode Pi is received among Fig. 2 and negative polarity picture element signal respectively with+V and-V representes.Please with reference to Fig. 1 and Fig. 2, when a frame period P21, the scan control signal Scan1 of one of which sweep trace enables on the corresponding panel, but makes write switch T11 and T12 conducting.At this moment, but positive polarity picture element signal+V and is stored in storage unit C11 via the write switch T11 of data line D11 and conducting.Simultaneously, but negative polarity picture element signal-V and is stored in storage unit C12 via the write switch T12 of data line D12 and conducting.After passing through enough storage times, scan control signal Scan1 cancellation enables, but makes write switch T11 and not conducting of T12.
Then, in a frame period P21, display control signal F11 and F12 enable in regular turn, but with control display switch S11 and S12 respectively the picture element signal of opposed polarity are sent to pixel electrode Pi in order.For instance, F11 enables when display control signal, but when making display switch S11 conducting, but positive polarity picture element signal+V that storage unit C11 is stored is sent to pixel electrode Pi via the display switch S11 of conducting.F12 enables when display control signal, but when making display switch S12 conducting, but negative polarity picture element signal-V that storage unit C12 is stored then is sent to pixel electrode Pi via the display switch S12 of conducting.
CLC has residual charge for fear of liquid crystal capacitance, and it is incorrect to cause picture to show, for example: the picture ghost; But therefore before display switch S11 and S12 conducting; Can earlier reset signal RST1 be enabled, make reset switch RS1 conducting, with replacement pixel electrode Pi.In the present embodiment, reset action for pixel electrode Pi is coupled to reset voltage VRST.
In brief, when present embodiment enables at the scan control signal Scan1 of corresponding one of which sweep trace, positive polarity and negative polarity picture element signal are stored to respectively among storage unit C11 and the C12.Then, according to display control signal F11 and F12, in a frame period, but conducting display switch S11 and S12 in order, respectively storage unit C11 and positive polarity that C12 is stored and negative polarity picture element signal are sent to pixel electrode Pi.Therefore, in the same frame period, pixel electrode Pi can react positive polarity and negative polarity picture element signal in order, thereby improves frame per second, and reduces the influence of film flicker.
According to the instruction of the foregoing description, the driving circuit 110 of pixel cell also can be applicable to the driving circuit of look preface (colorsequential) method.The type of drive of this look preface method is mainly in the time range that human eye vision persists, and on time shaft, switches the image frame of different colours apace, to produce the effect of colour mixture.Please with reference to Fig. 1 and Fig. 2, when scan control signal Scan1 enabled, the first colored pixels signal and the second colored pixels signal were respectively via data line D11 and D12 and be stored in storage unit C11 and C12.Then, in the same frame period, display control signal F11 and F12 enable in order, and the picture element signal with different colours is sent to pixel electrode Pi thus.But and the switching through display switch S11 and S12, image frame that can the switching displayed different colours.
Further, the driving circuit 110 of pixel cell can carry out driving of look preface and reversal of poles driving simultaneously.That is to say, when scan control signal Scan1 when a frame period enables, the second colored pixels signal that just will have the first colored pixels signal of positive polarity simultaneously and have a negative polarity is sent to storage unit C11 and C12 storage respectively.Then, in the same frame period, through the control of display control signal F11 and F12, the picture element signal of in order storage unit C11 and C12 being stored is sent to pixel electrode Pi.In addition, when scan control signal Scan1 when the next frame cycle enables once more, in like manner, according to as aforesaid mode of operation, the driving pixels unit.
Generally speaking, it is full-color that look preface type of drive needs individual three colors to be combined into, and for example is red, green and blue.Can implement the present invention easily according to the instruction of the embodiment of the invention for making this area have those skilled in the art, below lift an embodiment in addition and explain.Fig. 3 is the circuit diagram according to the driving circuit of one embodiment of the invention pixel cell.Please with reference to Fig. 3, but but the driving circuit 300 of pixel cell comprises write switch T31～T33, storage unit C31～C33 display switch S31～S33, reset switch RS3 and pixel electrode Pi.At this, but but write switch T31～T33 display switch S31～S33 and reset switch RS3 for example are transistor or other semiconductor switching devices.And storage unit C31～C33 for example is an electric capacity.
But the control end of write switch T31～T33 receives scan control signal Scan3, to determine whether conducting according to scan control signal Scan3.As shown in the figure, but first end of write switch T31～T33 and second end couple first end of data line D31～D33 and storage unit C31～C33 respectively.Second end of storage unit C31～C33 then couples reference voltage VREF.But the control end of display switch S31～S33 receives display control signal F31～F33 respectively, to determine whether conducting according to display control signal F31～F33.But first end of display switch S31～S33 couples first end of storage unit C31～C33 respectively, but and second end of display switch S31～S33 then couple pixel electrode Pi.First end of reset switch RS3 and second end couple pixel electrode Pi and reset voltage VRST respectively, and the control end of reset switch RS3 receives reset signal RST3 with whether conducting of control reset switch RS3.
Fig. 4 is the sequential chart of the driving circuit of pixel cell among embodiment of the invention Fig. 3.Please with reference to Fig. 3 and Fig. 4, for the ease of narration, positive polarity that pixel electrode Pi is received among Fig. 3 and negative polarity picture element signal respectively with+and-expression, and redness, green and blue pixel signal that pixel electrode Pi is received are represented with V1, V2 and V3 respectively.At first, at a frame period P41, the scan control signal Scan3 of one of which sweep trace enables on the corresponding panel, but makes write switch T31～T33 conducting.At this moment; But positive polarity red pixel signal+V1 is stored in storage unit C31 via the write switch T31 of data line D31 and conducting; But negative polarity green pixel signal-V2 is stored in storage unit C32 via the write switch T32 of data line D32 and conducting, but and positive polarity blue pixel signal+V3 be stored in storage unit C33 via the write switch T33 of data line D33 and conducting.Then, in a frame period P41, scan control signal F31～F32 enables in order, but makes display switch S31～S33 conducting in order, and the picture element signal of thus storage unit C31～C33 being stored is sent to pixel electrode Pi.Therefore, pixel electrode Pi just can react positive polarity red pixel signal+V1, negative polarity green pixel signal-V2 and positive polarity blue pixel signal+V3 in order in a frame period P41, to realize that the look preface drives and reversal of poles drives.
In like manner analogize; When scan control signal Scan3 enables at next frame cycle P42; But when making write switch T31～T33 conducting, negative polarity red pixel signal-V1, positive polarity green pixel signal+V2 and negative polarity blue pixel signal-V3 are stored in storage unit C31～C33 respectively.Then, in a frame period P42, scan control signal F31～F32 enables in order, but makes display switch S31～S33 conducting in order.Thus, pixel electrode Pi just can react positive polarity red pixel signal-V1, negative polarity green pixel signal+V2 and positive polarity blue pixel signal-V3 in order in a frame period P42.In the present embodiment, but reset signal RST3 enable before display switch S31～S33 conducting, make reset switch RS3 conducting, with replacement pixel electrode Pi.
It should be noted that the look preface drives on time shaft, switching the image frame of different colours fast, reach the effect of colour mixture, therefore do not limit to the sequencing that redness, green and blue pixel signal show.In addition, in embodiment Fig. 3, as far as same data line, during two continuous frames, need transmit the picture element signal of opposed polarity respectively, for example :+V1 reaches-V1.Therefore, in another embodiment of the present invention, driving circuit 300 front ends of pixel cell can couple a block diagram of frame rate converter (frame rate converter), and the picture element signal that transmits opposed polarity in the different frame cycle thus is to data line.
In order to improve frame per second effectively and to save the manufacturing cost that block diagram of frame rate converter spent, below lift an embodiment in addition and explain.Fig. 5 is the circuit diagram of the driving circuit of one embodiment of the invention pixel cell.Please with reference to Fig. 5, the driving circuit 500 of pixel cell comprises sub-driver element 510,520 and 530, reset switch RS5 and pixel electrode Pi.But but each sub-driver element 510,520 and 530 comprises write switch T51～T52 display switch S51～S52 and storage unit C51～C52; And each sub-driver element 510,520 and 530 two data lines through correspondence transmit picture element signal, that is D51～D52, D53～D54 and D55～D56.Wherein, each element couples relation in each sub-driver element 510,520 and 530, and is said identical with the driving circuit 110 (except that reset switch RS1) of pixel cell among embodiment Fig. 1, so do not give unnecessary details.In addition; But display switch S51 and S52 in the sub-driver element 510 are controlled by display control signal F51 and F52 respectively; But display switch S51 and S52 in the sub-driver element 520 are controlled by display control signal F53 and F54 respectively, but and display switch S51 and S52 in the sub-driver element 530 be controlled by display control signal F55 and F56 respectively.
Antithetical phrase driver element 510; When but scan control signal Scan5 enabled write switch T51～T52 conducting, positive polarity red pixel signal and negative polarity red pixel signal were stored in storage unit C51 and the C52 in the sub-driver element 510 via data line D51 and D52 respectively.Side by side; Antithetical phrase driver element 520 and 530; Positive polarity green pixel signal and negative polarity green pixel signal are stored in storage unit C51 and the C52 in the sub-driver element 520 respectively via data line D53 and D54, and positive polarity blue pixel signal and negative polarity blue pixel signal also are stored in storage unit C51 and C52 in the sub-driver element 530 via data line D55 and D56 respectively.Therefore, when scan control signal Scan5 enabled, the shades of colour picture element signal of positive-negative polarity can be stored in storage unit C51 and the C52 in each sub-driver element respectively.
Then, in a frame period, scan control signal F51～F56 can enable in order, but makes corresponding display switch conducting, and then the shades of colour picture element signal of positive-negative polarity is sent to pixel electrode Pi.That is to say; In the same frame period, pixel electrode Pi can react positive polarity red pixel signal, negative polarity red pixel signal, positive polarity green pixel signal, negative polarity green pixel signal, positive polarity blue pixel signal and negative polarity blue pixel signal in order.Be not limited to the sequencing that above-mentioned picture element signal shows at this.In the present embodiment, but reset signal RST5 can before the display switch S51 in each sub-driver element and S52 conducting, enable, with replacement pixel electrode Pi.
The driving circuit 300 of the pixel cell of present embodiment adopts the look preface to drive and the reversal of poles type of drive; The shades of colour pixel that it stores positive-negative polarity through storage unit C51 in each sub-driver element and C52; But thereby only need be through display switch S51 in each sub-driver element and the switching of S52; Just can improve frame per second effectively, need not extra block diagram of frame rate converter control picture element signal and be sent to data line in the different frame cycle.
In addition; Because the shades of colour picture element signal of positive-negative polarity has been stored among the storage unit C51 and C52 in each sub-driver element; Therefore another embodiment of the present invention can make the scan control signal F51～F56 of part enable in order, for example: F51, F54 and F55 in a frame period.Therefore, in the same frame period, pixel electrode Pi can react positive polarity red pixel signal, negative polarity green pixel signal and positive polarity blue pixel signal in order.And, the scan control signal F51～F56 of another part is enabled in order in the next frame cycle, for example: F52, F53 and F56.Therefore, in the same frame period, pixel electrode Pi just can react negative polarity red pixel signal, positive polarity green pixel signal and negative polarity blue pixel property number in order.
In sum, the foregoing description Fig. 1 is in a frame period, but the switching through write switch T11 and T12 is stored in the picture element signal of opposed polarity respectively among storage unit C11 and the C12.Then,, but switch, the picture element signal of opposed polarity is sent to pixel electrode Pi in order, drive with the reversal of poles that realizes high frame per second through display switch S11 and S22 in the same frame period.In addition, embodiment Fig. 1 storage unit C11 also capable of using and C12 store the picture element signal of different colours, carry out the driving of look preface but switch through display switch S11 and S22 again.
Be generally switching displayed redness, green and blue three kinds of color pictures because the look preface drives, so a kind of driving circuit with three storage unit C31～C33 is proposed embodiment Fig. 3.When scan control signal Scan3 when a frame period enables, the redness that positive-negative polarity replaces, green and blue pixel signal then are stored in storage unit C31～C33 respectively.In the same frame period, but the switching through display switch S31～S33 then can be sent to pixel electrode Pi with the picture element signal that storage unit C31～C33 is stored.When scan control signal Scan3 when the next frame cycle enables, then be stored in storage unit C31～C33 respectively with redness, green and the blue pixel signal of a last picture opposite polarity.In the same frame period, but the switching through display switch S31～S33 then can be sent to pixel electrode Pi with the picture element signal that storage unit C31～C33 is stored.
In embodiment Fig. 5, when scan control signal Scan5 when a frame period enables, just side by side the shades of colour picture element signal of opposed polarity is sent to storage unit C51 and C52 storage in each sub-driver element.Therefore, but only need to pass through interior display switch S51 of each sub-driver element and the switching of S52, just can carry out driving of look preface and reversal of poles and drive, and the frame per second of decision demonstration.The foregoing description need not additional frame buffer come the storage pixel signal, but can improve frame per second through the switching of display switch, takes place with the situation of avoiding film flicker.
Though the present invention with preferred embodiment openly as above; Right its is not that any those skilled in the art are not breaking away from the spirit and scope of the present invention in order to qualification the present invention; When can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (12)
1. the driving circuit of a pixel cell comprises:
But one first write switch, its control end receives the one scan control signal, and its first end couples one first data line;
But one second write switch, its control end receives this scan control signal, and its first end couples one second data line;
One first storage unit, but its first end couples second end of this first write switch, and its second end couples a reference voltage, but wherein this first storage unit receives one first picture element signal via this first write switch;
One second storage unit, but its first end couples second end of this second write switch, and its second end couples this reference voltage, but wherein this second storage unit receives one second picture element signal via this second write switch;
But one first display switch, its control end receive one first display control signal, and its first end couples first end of this first storage unit;
But one second display switch, its control end receive one second display control signal, and its first end couples first end of this second storage unit;
One pixel electrode, but but couple second end of this first display switch and second end of this second display switch, but but in order to receive this first picture element signal and this second picture element signal in a frame period respectively via this first display switch and this second display switch; And
One reset switch; Its control end receives a reset signal; But but its first end couples second end of this first display switch and second end of this second display switch; Its second end couples a reset voltage, in order to before this first display switch and this second display switch conducting, and this pixel electrode of resetting.
2. driving circuit as claimed in claim 1, wherein this first picture element signal and this second picture element signal are respectively the picture element signal of positive polarity and negative polarity.
3. driving circuit as claimed in claim 1, wherein this first picture element signal and this second picture element signal are respectively one first color and one second color pixel signal.
4. driving circuit as claimed in claim 3, wherein this first picture element signal and this second picture element signal are respectively the picture element signal of positive polarity and negative polarity.
5. the driving method of a pixel cell comprises:
According to the one scan control signal, transmit one first picture element signal to, first storage unit from one first data line, and transmit one second picture element signal to, second storage unit from one second data line;
According to a display control signal, respectively this first storage unit and this second storage unit are electrically connected to a pixel electrode in a frame period, to show this first picture element signal and this second picture element signal; And
According to a reset signal, before this display control signal enables, electrically connect this pixel electrode to one reset voltage, with this pixel electrode of resetting.
6. driving method as claimed in claim 5, wherein this first picture element signal and this second picture element signal are respectively the picture element signal of positive polarity and negative polarity.
7. driving method as claimed in claim 5, wherein this first picture element signal and this second picture element signal are respectively one first color and one second color pixel signal.
8. driving method as claimed in claim 6, wherein this first picture element signal and this second picture element signal are respectively the picture element signal of positive polarity and negative polarity.
9. the driving circuit of a pixel cell comprises:
But one first write switch, its control end receives the one scan control signal, and its first end couples one first data line;
But one second write switch, its control end receives this scan control signal, and its first end couples one second data line;
But one the 3rd write switch, its control end receives this scan control signal, and its first end couples one the 3rd data line;
One first storage unit, but its first end couples second end of this first write switch, and its second end couples a reference voltage, but wherein this first storage unit receives one first picture element signal via this first write switch;
One second storage unit, but its first end couples second end of this second write switch, and its second end couples this reference voltage, but wherein this second storage unit receives one second picture element signal via this second write switch;
One the 3rd storage unit, but its first end couples second end of the 3rd write switch, and its second end couples this reference voltage, but wherein the 3rd storage unit receives one the 3rd picture element signal via the 3rd write switch;
But one first display switch, its control end receive one first display control signal, and its first end couples first end of this first storage unit;
But one second display switch, its control end receive one second display control signal, and its first end couples first end of this second storage unit;
But one the 3rd display switch, its control end receive one the 3rd display control signal, and its first end couples first end of the 3rd storage unit;
One pixel electrode; But but but couple second end of this first display switch, second end of this second display switch and second end of the 3rd display switch, but but but in order to receive this first picture element signal, this second picture element signal and the 3rd picture element signal in a frame period respectively via this first display switch, this second display switch and the 3rd display switch; And
One reset switch; Its control end receives a reset signal; But but but its first end couples second end of this first display switch, second end of this second display switch and second end of the 3rd display switch; Its second end couples a reset voltage, in order to before this first display switch, this second display switch and the 3rd display switch conducting, and this pixel electrode of resetting.
10. driving circuit as claimed in claim 9, wherein this first picture element signal, this second picture element signal and the 3rd picture element signal are respectively one first color, one second color and one the 3rd color pixel signal.
11. driving circuit as claimed in claim 10, wherein this first picture element signal, this second picture element signal and the 3rd picture element signal are respectively the picture element signal of positive polarity, negative polarity and positive polarity.
12. driving circuit as claimed in claim 10, wherein this first picture element signal, this second picture element signal and the 3rd picture element signal are respectively the picture element signal of negative polarity, positive polarity and negative polarity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100985385A CN101587689B (en) | 2008-05-22 | 2008-05-22 | Drive circuit of pixel cell and drive method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100985385A CN101587689B (en) | 2008-05-22 | 2008-05-22 | Drive circuit of pixel cell and drive method thereof |
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| Publication Number | Publication Date |
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| CN101587689A CN101587689A (en) | 2009-11-25 |
| CN101587689B true CN101587689B (en) | 2012-01-11 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1982956A (en) * | 2005-12-16 | 2007-06-20 | 群康科技(深圳)有限公司 | Liquid-crystal display panel and its display method |
| US20080055216A1 (en) * | 2006-08-29 | 2008-03-06 | Himax Display, Inc. | Liquid crystal display and methods for driving the same |
| US20080084370A1 (en) * | 2006-10-05 | 2008-04-10 | Au Optronics Corp. | Liquid crystal display and driving method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1982956A (en) * | 2005-12-16 | 2007-06-20 | 群康科技(深圳)有限公司 | Liquid-crystal display panel and its display method |
| US20080055216A1 (en) * | 2006-08-29 | 2008-03-06 | Himax Display, Inc. | Liquid crystal display and methods for driving the same |
| US20080084370A1 (en) * | 2006-10-05 | 2008-04-10 | Au Optronics Corp. | Liquid crystal display and driving method thereof |
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| CN101587689A (en) | 2009-11-25 |
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