CN100505020C - Method and apparatus for driving double-selection diode liquid crystal display - Google Patents
Method and apparatus for driving double-selection diode liquid crystal display Download PDFInfo
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- CN100505020C CN100505020C CNB200510077694XA CN200510077694A CN100505020C CN 100505020 C CN100505020 C CN 100505020C CN B200510077694X A CNB200510077694X A CN B200510077694XA CN 200510077694 A CN200510077694 A CN 200510077694A CN 100505020 C CN100505020 C CN 100505020C
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Abstract
The invention relates to a dual-select display driving method and relative device, wherein in the pixel structure, the invention uses two horizontal select signals to select each pixel, and the select signal can alternatively change polarity in different time. The inventive method can balance the pixel voltage with asymmetry positive and passive polarities, to eliminate flash condition.
Description
Technical field
The invention relates to a kind of display method of driving and device, and particularly relevant for a kind of method and devices that utilize two selection driving displays.
Background technology
Displaying principle in the LCD is to utilize the electric field controls liquid crystal molecule, reaches the effect of printing opacity or shading.Wherein, each pixel is that (transistor is electric crystal as thin film transistor (TFT) in utilization, below all being called transistor) (Thin-Film Transistor, " TFT ") or field-effect transistor active members such as (FieldEffect Transistor, " FET ") reach the action of switch.When the input scan signal made active member be selection mode (opening), signal to display will be sent on the pixel via this active member.Otherwise if during nonselection mode (pass), display signal is stored and remains on each pixel, makes each pixel that the action of memory be arranged, and waits for driving next time at any time.That is to say, the purpose of pixel switch in the LCD, be used for exactly in select time, (data are data to this liquid crystal load capacitance of charging exactly (LC Capacitance) to data, below all be called data) voltage quasi position (Data Voltage Level), and be maintained a bit of time of voltage at non-select time.
In traditional LCD, owing to need in the regular hour interval, upgrade the state of each pixel (Pixel) termly, for example in the sampling rate (Frame Rate) of 60 pictures of per second, this is necessary condition, because the limited time of the current potential of its state is kept or preserved to pixel energy, also be in addition because picture can change to some extent according to data presented.Therefore how can in pixel, change current potential or store charge apace, and to keep electric charge efficiently be very important condition at an image time at least.
A kind of " balance drives electronic matrix system and its method of operating (Balanced Drive Electronic Matrix System and Method ofOperating The Same) " proposed in the 4th, 731, No. 610 patents of the U.S..In this patent, disclose a kind of each pixel and driven, just traditional double-selection diode (Dual Select Diode, " DSD ") liquid crystal display driving method by a pair of diode.Please refer to Fig. 1, be presented at traditional pixel equivalent circuit structure in the LCD.In this dot structure 100, comprise two bilateral diodes (BidirectionalDiode) 110 and 120, and a liquid crystal load capacitance (LC Capacitor) 130.This bilateral diode is a kind of diode with two critical voltage values, but the identical polarity of the value of these two critical voltages is opposite.And dot structure 100 is connected to two selection wire SAn and SBn and data line Di.The selection of pixel is that the current potential by selection wire SAn and SBn is determined, and pixel data is imported by data line Di.
When liquid crystal load capacitance 130 will be charged, the positive voltage that surpasses bilateral diode 110 critical voltage values can impose on selection wire SAn, and the negative voltage that is lower than bilateral diode 120 critical voltage values can impose on selection wire SBn, and this will make electric current flow into and the carrying out of acceleration liquid crystal load capacitance 130 chargings from selection wire SAn and SBn respectively.And the data voltage that is imposed on by data line Di when liquid crystal load capacitance 130 charges and when having reached predetermined magnitude of voltage, respectively selection wire SAn and selection wire SBn are imposed absolute value of voltage subcritical magnitude of voltage size but opposite polarity magnitude of voltage, and make electric charge be stored in liquid crystal load capacitance 130 effectively.
In the framework and its driving method of this LCD, (be commonly referred to as and select signal wire) positive polarity of being executed that is all because selection wire SAn, and selection wire SBn (being commonly referred to as down the selection signal wire) is all negative polarity.Therefore, in case skew or out of true are arranged on the pixel processing procedure of LCD slightly, for example with reference to the pixel equivalent circuit structure of figure 2, between bilateral diode 120 and liquid crystal load capacitance 130, owing to the difference on the processing procedure has produced an equivalent resistance 140, and these equivalent resistance 140 two ends exist magnitude of voltage Δ Vp value.Also therefore, the magnitude of voltage Vlc that the data voltage Vdata that please refer to the selection wire SAn of Fig. 3 and SBn, data line Di is imposed on and liquid crystal load capacitance 130 are stored, owing to the equivalent resistance 140 that the difference on the processing procedure produces, cause deviation to some extent with the stored magnitude of voltage Vlc of predetermined data voltage Vdata and liquid crystal load capacitance 130.The asymmetric pixel driven of this positive-negative polarity can cause the generation of LCD flicker (Flicker) phenomenon.
Summary of the invention
Purpose of the present invention is providing a kind of driving circuit and driving method exactly, even skew or out of true are arranged on the pixel processing procedure of display slightly, also can eliminate the asymmetric problem of positive-negative polarity that produces because of processing procedure difference effectively.
Purpose of the present invention is providing a kind of driving circuit and driving method exactly, be applicable to a display, wherein this display is arranged to form in the mode of matrix by most pixels and is formed, and each pixel is by one first selection wire and the selected driving of one second selection wire, and transmits data presented by a data line.And the voltage that first selection wire and second selection wire are bestowed, in the image time interval of specific quantity, but therefore alternate and not to be subjected to must be the positive polarity or the restriction of negative polarity can eliminate the asymmetric problem of positive-negative polarity that produces because of processing procedure difference in this image time interval.
In one embodiment, the present invention proposes a kind of driving method, is applicable to via one first selection wire and one second selection wire to select to drive a pixel.The method is included in polarity chron of each frame updating, to first selection wire voltage of bestowing and the voltage that second selection wire is bestowed, but alternate polarity, and the polarity complementation of the voltage that first selection wire is bestowed and the voltage that second selection wire is bestowed.
In the above-mentioned driving method, the voltage that first selection wire is bestowed is to bestow the polarity of voltage according to a pre-defined rule conversion with the mode of the alternating voltage changed polarity that second selection wire is bestowed.In one embodiment, this pre-defined rule is to change the polarity of bestowing voltage in the image time interval of a specific quantity.
In the above-mentioned driving method, the voltage that first selection wire is bestowed is to bestow the polarity of voltage according to mode conversion at random with the mode of the alternating voltage changed polarity that second selection wire is bestowed.In one embodiment, this mode of bestowing the polarity of voltage according to mode conversion at random is to change the polarity of bestowing voltage in the image time interval of random amount.
In another embodiment, the present invention proposes a kind of driving method, be applicable to a matrix form driving display, wherein the matrix form driving display is arranged to form in the mode of matrix by most pixels and is formed, and each pixel is by one first selection wire and the selected driving of one second selection wire, and transmits data presented by a data line.This driving method comprises polarity chron of each frame updating of data voltage of bestowing when to data line, to first selection wire voltage of bestowing and the voltage that second selection wire is bestowed, but alternate polarity, and the polarity complementation of the voltage that first selection wire is bestowed and the voltage that second selection wire is bestowed.
In the above-mentioned driving method, the voltage that first selection wire is bestowed is to bestow the polarity of voltage according to a pre-defined rule conversion with the mode of the alternating voltage changed polarity that second selection wire is bestowed.In one embodiment, this pre-defined rule is to change the polarity of bestowing voltage in the image time interval of a specific quantity.
In the above-mentioned driving method, the voltage that first selection wire is bestowed is to bestow the polarity of voltage according to mode conversion at random with the mode of the alternating voltage changed polarity that second selection wire is bestowed.In one embodiment, this mode of bestowing the polarity of voltage according to mode conversion at random is to change the polarity of bestowing voltage in the image time interval of random amount.
In the above-mentioned driving method, the voltage of under same picture all first selection wires being bestowed is simultaneously for positive polarity, and to the polarity complementation of first selection wire voltage of bestowing and the voltage that second selection wire is bestowed.
In the above-mentioned driving method, the voltage systematicness under same picture, all first selection wires bestowed ground distribution positive polarity and negative polarity, and to the polarity complementation of first selection wire voltage of bestowing and the voltage that second selection wire is bestowed.
In one embodiment, when voltage systematicness ground distribution positive polarity of under same picture, all first selection wires being bestowed and negative polarity, all odd number first selection wires from first selection wire are bestowed the voltage of positive polarity, and all even number first selection wires in first selection wire are bestowed the voltage of negative polarity, and the polarity complementation of the voltage that first selection wire is bestowed and the voltage that second selection wire is bestowed.
In another embodiment, the present invention proposes a kind of driving circuit of matrix form driving display.This driving circuit is connected to a display panel, arranged in the mode of matrix by most pixels to form, and each pixel is by an article one selection wire and a second selection that selection wire drives, and transmits data presented by a data line.This driving circuit comprises shift registor, has most address passages, receives sweep signal and is stored in the address passage according to a clock pulse signal.The activation selected cell spreads out of in order to receive an activation signal and to use the scan-data that will be stored in the address passage of shift register.And a position quasi converter is connected to the activation selected cell, the scan-data that spreads out of in order to the address passage that receives by shift register, and carry out the accurate conversion in position.Multiplexer optionally spreads out of in order to the scan-data of control with the conversion of position quasi converter.And output buffer in order to receive by multiplexer transmit via the scan-data after the accurate conversion in position, and via article one selection wire corresponding and second selection wire driving pixel with pixel, wherein when polarity chron of each frame updating of data voltage that data line is bestowed, to first selection wire voltage of bestowing and the voltage that second selection wire is bestowed, but alternate polarity, and the polarity complementation of the voltage that first selection wire is bestowed and the voltage that second selection wire is bestowed.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 is the pixel equivalent circuit structure that is presented at a kind of traditional LCD.
Fig. 2 is presented at a kind of pixel equivalent circuit structure with LCD that processing procedure difference causes.
Fig. 3 is that the driving method that shows traditional LCD is selected the accurate synoptic diagram in signal voltage position.
Fig. 4 A is presented at the pixel equivalent circuit structure that can use the driving method of preferred embodiment of the present invention in the matrix form driving display (Matrix Driving Display).
Fig. 4 B is that the driving method that shows preferred embodiment of the present invention is selected the accurate synoptic diagram in signal voltage position.
Fig. 5 is the driving voltage waveform synoptic diagram that shows the driving method of the preferred embodiment according to the present invention.
Fig. 6 is the driving voltage waveform synoptic diagram that shows the driving method of another preferred embodiment according to the present invention.
Fig. 7 is the matrix form driving display synoptic diagram of the driving method of utilization preferred embodiment of the present invention.
100: dot structure
110,120: bilateral diode (Bidirectional Diode)
130: liquid crystal load capacitance (LC Capacitor)
SAn and SBn: selection wire
Di: data line
400: dot structure
410,420: two-way critical voltage element (Bidirectional Threshold Device)
430: equivalent load capacitance (Capacitor)
700: driving circuit
705: display panel
710: shift registor (Shift Register)
720: activation selected cell (Enable Selecting Unit)
730: position quasi converter (Level Shifters)
740: multiplexer (Multiplexers)
750: output buffer (Output Buffer)
760: polarity control circuit (Polarity Control Circuit)
Embodiment
The present invention proposes a kind of driving method, be applicable to a matrix form driving display, wherein the matrix form driving display is arranged to form in the mode of matrix by most pixels and is formed, and each pixel is by one first selection wire and the selected driving of one second selection wire, and transmits data presented by a data line.
This driving method comprises polarity chron of each frame updating of data voltage that data line is bestowed, to first selection wire voltage of bestowing and the voltage that second selection wire is bestowed, but alternate polarity, and the polarity complementation of the voltage that first selection wire is bestowed and the voltage that second selection wire is bestowed.And the mode of alternate polarity is according to a pre-defined rule or changes the polarity of bestowing voltage at random.In one embodiment, this pre-defined rule is to change the polarity of bestowing voltage in the image time interval of a specific quantity.In addition in one embodiment, this mode of bestowing the polarity of voltage according to mode conversion at random is to change the polarity of bestowing voltage in the image time interval of random amount.
The present invention proposes in a kind of driving method, but the mode of alternate polarity, also the voltage that can bestow all first selection wires under same picture is simultaneously for positive polarity, and to the polarity complementation of first selection wire voltage of bestowing and the voltage that second selection wire is bestowed.And the voltage systematicness that all first selection wires are bestowed ground distribution positive polarity and negative polarity, and to the polarity complementation of first selection wire voltage of bestowing and the voltage that second selection wire is bestowed.
In one embodiment, when voltage systematicness ground distribution positive polarity of under same picture, all first selection wires being bestowed and negative polarity, all odd number first selection wires from first selection wire are bestowed the voltage of positive polarity, and all even number first selection wires in first selection wire are bestowed the voltage of negative polarity, and the polarity complementation of the voltage that first selection wire is bestowed and the voltage that second selection wire is bestowed.
Under will propose embodiment and specify technology of the present invention.
Please refer to Fig. 4 A, be presented at the pixel equivalent circuit structure that to use the driving method of preferred embodiment of the present invention in the matrix form driving display (Matrix Driving Display).In this dot structure 400, comprise 410 and 420 and equivalent load capacitances (Capacitor) 430 of two two-way critical voltage elements (Bidirectional Threshold Device).This two-way critical voltage element for example is the element with two critical voltage values, and the value of these two critical voltages can be identical and polarity is opposite, in a preferred embodiment, can be formed by bilateral diode (Bidirectional Diode), and in another embodiment, also can form, decide according to the needs in the design by the element that thin film transistor (TFT) (Thin-Film Transistor, " TFT ") or the like has a critical voltage.And equivalent load capacitance (Capacitor) is if 430 be liquid crystal load capacitance (LiquidCrystal Capacitor) when for example being used in LCD.
When equivalent load capacitance 430 will charge, magnitude of voltage can be bestowed selection wire SAn (be commonly referred to as and select signal wire) and selection wire SBn (be commonly referred to as down and select signal wire), so that quicken the carrying out of equivalent negative live 430 chargings.And the data voltage that is imposed on by data line Di when liquid crystal load capacitance 430 charges and when having reached predetermined magnitude of voltage, respectively selection wire SAn and selection wire SBn are imposed absolute value of voltage subcritical magnitude of voltage size but opposite polarity magnitude of voltage, and make electric charge be stored in liquid crystal load capacitance 430 effectively.
In matrix form driving display driving method proposed by the invention, in a preferred embodiment, polarity chron of each frame updating of data voltage of being bestowed as data line Di, the voltage that voltage that selection wire SAn (be commonly referred to as and select signal wire) is bestowed and selection wire SBn (be commonly referred to as down and select signal wire) are bestowed, in the image time interval of specific quantity, but alternate and not to be subjected to must be the positive polarity or the restriction of negative polarity, and all selection wire SAn (n=1
-N, N are all horizontal display line quantity) then when same image time, all selection wire SAn (signal wires are selected in just all going up) or all selection wire SBn (just all following selection signal wires) are positive polarity or negative polarity all simultaneously.In a preferred embodiment, in the time interval of per four pictures, all last selection wire SAn or all following selection wire SBn can bestow the voltage of two positive polaritys and the voltage of two negative polarity, certainly, it is necessary opposite with the polarity of voltage of bestowing down selection wire SBn to bestow selection wire SAn.
The driving method of preferred embodiment of the present invention is selected the signal voltage level digram, can be with reference to figure 4B, comprising the accurate synoptic diagram in selection signal voltage position of bestowing selection wire SAn and selection wire SBn.Can know among the figure and learn in the time interval of four pictures, the voltage level that selection wire SAn is bestowed be Vs-Vos, Vs+Vos ,-Vs-Vos and Vs+Vos, (pictures n and pictures n+1) is positive polarity voltage in the time interval of preceding two pictures, and (pictures n+2 and pictures n+3) are reverse voltage in the time interval of latter two picture.The voltage level that selection wire SBn bestowed for-Vs-Vos ,-Vs+Vos, Vs-Vos and Vs+Vos, (pictures n and pictures n+1) is reverse voltage in the time interval of preceding two pictures, and (pictures n+2 and pictures n+3) are positive polarity voltage in the time interval of latter two picture.Wherein Vs is for selecting signal voltage, and Vos then is a bias value.And the GND in the diagram is the logic ground magnitude of voltage, and this magnitude of voltage can be 0V or adjusts according to the needs in the design.
Pixel equivalent circuit structure as the driving method of utilization preferred embodiment of the present invention as shown among Fig. 4 A and the 4B, even skew or out of true are arranged on the pixel processing procedure of display slightly, for example at the connected node 415 of two-way critical voltage element 420 with equivalent load capacitance 430, and there is the equivalent resistance 440 that produces because of processing procedure difference between the two-way critical voltage element 420, when its voltage difference that causes is Δ Vp, because the voltage that selection wire SAn and selection wire SBn are bestowed, in the image time interval of specific quantity, but therefore alternate and not to be subjected to must be the positive polarity or the restriction of negative polarity can eliminate the asymmetric problem of positive-negative polarity that produces because of processing procedure difference in this image time interval.Therefore, for example the flicker of display thereby generation (Flicker) phenomenon is eliminated.
The equivalent resistance 440 that the processing procedure difference that is put forward is in this embodiment caused, the feature of present embodiment for convenience of description only, yet the difference on the processing procedure the influence that may cause, also may between two-way critical voltage element 410 and equivalent load capacitance 430, produce another equivalent resistance, or other problem, these all can be reached by the present embodiment proposition is alternately bestowed opposed polarity for selection wire SAn and selection wire SBn in the image time interval of specific quantity voltage, so can eliminate the asymmetric problem of positive-negative polarity that produces because of processing procedure difference in this image time interval.
In order to be illustrated more clearly in the more traditional driving method and the driving method of the embodiment of the invention.Subordinate list one and subordinate list two under please refer to.Selecting signal voltage in this hypothesis is that Vs is that 15V, bias voltage Vos are that 3V, data voltage Vd are that 2.5V and pixel voltage difference Δ Vp=1V are example.Vp is the magnitude of voltage of the connected node 415 of two-way critical voltage element 410,420 and equivalent load capacitance 430.From subordinate list one and subordinate list two, know the driving method of conventional ADS driving method and present embodiment, the variation of pixel voltage under different pictures.
Subordinate list one
Subordinate list two
The variation of pixel voltage under different pictures as can be known from two above subordinate lists.In traditional driving method, as subordinate list one, the variation of pixel voltage be in proper order 5V ,-6V, 5V ,-6V, or the like.And in the driving method of the embodiment of the invention, as subordinate list two, the variation of pixel voltage be in proper order 5V ,-6V, 6V ,-5V, or the like.In the embodiment of this explanation, alternately bestow the voltage of opposed polarity in four image time intervals, the asymmetric problem of positive-negative polarity that can elimination produces because of processing procedure difference in the time interval of this this four pictures for selection wire SAn and selection wire SBn.
Bestow the effect that the voltage of opposed polarity produces for being described in more detail to utilize in the present embodiment in four image time intervals alternately to selection wire SAn and selection wire SBn, please refer to Fig. 5, is the driving voltage waveform synoptic diagram that shows the driving method of the preferred embodiment according to the present invention.In per four image time intervals, just pictures n as shown in the figure, pictures n+1, pictures n+2 and pictures n+3, the voltage level that selection wire SAn is bestowed be respectively Vs-Vos, Vs+Vos ,-Vs-Vos and Vs+Vos, (pictures n and pictures n+1) is positive polarity voltage in the time interval of preceding two pictures, and (pictures n+2 and pictures n+3) are reverse voltage in the time interval of latter two picture.In addition, to voltage level that selection wire SBn bestowed for-Vs-Vos ,-Vs+Vos, Vs-Vos and Vs+Vos, (pictures n and pictures n+1) is reverse voltage in the time interval of preceding two pictures, and (pictures n+2 and pictures n+3) are positive polarity voltage in the time interval of latter two picture.And the variation of data voltage Vdata is the reversal of poles of each picture in proper order, just Vd as shown ,-Vd, Vd ,-Vd, the variation of pixel voltage Vlc order then be Vd-(Vos+ Δ Vp/2) ,-Vd-(Vos+ Δ Vp/2), Vd-(Vos-Δ Vp/2)-Vd-(Vos-Δ Vp/2), wherein voltage difference delta Vp makes a variation because of the voltage that processing procedure difference produces for hypothesis, generation as above-mentioned equivalent resistance, and Vs is the selection signal voltage, and Vos then is a bias value.And the GND in the diagram is the logic ground magnitude of voltage, and this magnitude of voltage can be 0V or adjusts according to the needs in the design.With after the value addition of these four pixel voltages promptly as can be known the driving method of present embodiment eliminate the asymmetric problem of positive-negative polarity produce because of processing procedure difference really effectively, and then eliminate the phenomenon of glimmering.
In the foregoing description, for selection wire SAn, preceding two pictures of the voltage level of being bestowed are positive polarity voltage and latter two picture is a reverse voltage.In addition, for selection wire SBn, preceding two pictures of the voltage level of being bestowed are reverse voltage and latter two picture is the arrangement of positive polarity voltage, only are preferred embodiments of the present invention.In a further embodiment, as long as the voltage level polarity that selection wire SAn and SBn are bestowed is opposite, and the quantity of positive polarity and negative polarity quite can reach the asymmetric problem of positive-negative polarity that elimination of the present invention produces because of processing procedure difference.In addition, utilize in four image time intervals alternately to selection wire SAn and selection wire SBn and bestow the effect that the voltage of opposed polarity produces, also can apply in the image time interval of varying number, for example six or eight or the like look closely the sampling rate of display and determine.The asymmetric voltage differences that produces of positive-negative polarity is eliminated in the image time interval of specific quantity as long as be enough to.
Bestowing the effect that the voltage of opposed polarity produces for being described in more detail to utilize in the present embodiment in four image time intervals alternately to selection wire, please refer to Fig. 6, is the driving voltage waveform synoptic diagram that shows the driving method of another preferred embodiment according to the present invention.Mainly be that all selection wire SAn and SBn are divided into odd number and even number classification, and in four image time intervals, alternately bestow different voltage combinations, also attainable cost invention.
As shown in Figure 6, all last selection wires are divided into the last selection wire SAn of odd number and the last selection wire SAn ' of even number.Suppose if selection wire on the even numbers N bar arranged, then n=1,3,5 ...., N-1, and n '=2,4,6 ...., N.All following selection wires are divided into the last selection wire SBn of odd number and the last selection wire SBn ' of even numbers.Suppose if selection wire on the even number N bar arranged, then n=1,3,5 ...., N-1, and n '=2,4,6 ...., N.
In per four image time intervals, just pictures n as shown in the figure, pictures n+1, pictures n+2 and pictures n+3, the voltage level that odd number selection wire SAn is bestowed be respectively Vs-Vos, Vs+Vos ,-Vs-Vos and Vs+Vos, (pictures n and pictures n+1) is positive polarity voltage in the time interval of preceding two pictures, and (pictures n+2 and pictures n+3) are reverse voltage in the time interval of latter two picture.The voltage level that dual numbers selection wire SAn ' is bestowed is respectively-Vs-Vos, Vs+Vos, Vs-Vos and Vs+Vos, be reverse voltage in the time interval of preceding two pictures, and the time interval of latter two picture interior be positive polarity voltage.
In addition, in per four image time intervals, just pictures n as shown in the figure, pictures n+1, pictures n+2 and pictures n+3, the voltage level that odd number selection wire SBn is bestowed for-Vs-Vos ,-Vs+Vos, Vs-Vos and Vs+Vos, (pictures n and pictures n+1) is reverse voltage in the time interval of preceding two pictures, and (pictures n+2 and pictures n+3) are positive polarity voltage in the time interval of latter two picture.And the voltage level that dual numbers selection wire SBn ' is bestowed be Vs-Vos, Vs+Vos ,-Vs-Vos and-Vs+Vos, be positive polarity voltage in the time interval of preceding two pictures, and the time interval of latter two picture interior be reverse voltage.
And the variation of data voltage Vdata is in proper order for promptly carrying out reversal of poles in each picture, just the reversal of poles of carrying out Vd and-Vd in same image time as shown.Data voltage Vdata in pictures n, pictures n+1, pictures n+2 and pictures n+3 be respectively Vd to-Vd ,-Vd to Vd, Vd to-Vd and-Vd is to Vd.
Corresponding to the variation order of the pixel voltage Vlc of odd number selection wire SAn and SBn then be Vd-(Vos+ Δ Vp/2) ,-Vd-(Vos+ Δ Vp/2), Vd-(Vos-Δ Vp/2)-Vd-(Vos-Δ Vp/2), corresponding to the variation of the pixel voltage Vlc of odd number selection wire SAn and SBn then be in proper order Vd-(Vos-Δ Vp/2) ,-Vd+ (Vos-Δ Vp/2), Vd-(Vos+ Δ Vp/2) ,-Vd-(Vos+ Δ Vp/2).Wherein voltage difference delta Vp makes a variation because of the voltage that processing procedure difference produces for hypothesis, and as the generation of above-mentioned equivalent resistance, and Vs is the selection signal voltage, and Vos then is a bias value.And the GND in the diagram is the logic ground magnitude of voltage, and this magnitude of voltage can be 0V or adjusts according to the needs in the design.With after the value addition of these four pixel voltages promptly as can be known the driving method of present embodiment eliminate the asymmetric problem of positive-negative polarity produce because of processing procedure difference really effectively, and then eliminate the phenomenon of glimmering.
Please refer to the driving circuit synoptic diagram of matrix form driving display of driving method of the utilization preferred embodiment of the present invention of Fig. 7, this driving circuit 700 is to be connected to display panel 705.In this driving display, each dot structure of display panel 705 is by two selection wire SAn and selection wire selection that SBn drives, as shown the SA1 in, SB1, SA2, SB2 .... to SAX, SBX, X is the address port number.And this driving circuit 700 comprises shift registor (Shift Register) 710, activation selected cell (Enable Selecting Unit) 720, position quasi converter (Level Shifters) 730, multiplexer (Multiplexers) 740 and output buffer (Output Buffer) 750.And comprise more that in addition a polarity control circuit (Polarity Control Circuit) 760 is connected to multiplexer 740 and output buffer 750, and according to the polarity switching signal POL control switch polarity that is received.
In sum, the invention provides a kind of new driving method, can the traditional asymmetric pixel voltage of positive-negative polarity of balance, eliminate the scintillation that is produced in the conventional ADS driving method effectively.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (16)
1, a kind of driving method, be applicable to a matrix form driving display, wherein this matrix form driving display is arranged to form in the mode of matrix by most pixels and is formed, and each this pixel is by one first selection wire and the selected driving of one second selection wire, and transmit data presented by a data line, it is characterized in that this driving method comprises:
When polarity chron of each frame updating of the data voltage that this data line is bestowed, to this first selection wire voltage of bestowing and the voltage that this second selection wire is bestowed, but alternate polarity, and the polarity complementation of the voltage that this first selection wire is bestowed and the voltage that this second selection wire is bestowed.
2, driving method according to claim 1 is characterized in that wherein said mode to this first selection wire voltage of bestowing and the alternating voltage changed polarity that this second selection wire is bestowed is to bestow the polarity of voltage according to a pre-defined rule conversion.
3, driving method according to claim 2 is characterized in that wherein said pre-defined rule is to change the polarity of bestowing voltage in the image time interval of a specific quantity.
4, driving method according to claim 1 is characterized in that wherein said mode to this first selection wire voltage of bestowing and the alternating voltage changed polarity that this second selection wire is bestowed is to bestow the polarity of voltage according to mode conversion at random.
5, driving method according to claim 4, the mode that it is characterized in that wherein bestowing according to mode conversion at random the polarity of voltage is to change the polarity of bestowing voltage in the image time interval of random amount.
6, driving method according to claim 1, it is characterized in that voltage that wherein those first selection wires are bestowed to all under same picture is positive polarity simultaneously, and to the polarity complementation of those first selection wires voltage of bestowing and the voltage that those second selection wires are bestowed.
7, driving method according to claim 1, it is characterized in that voltage systematicness that wherein those first selection wires are bestowed to all under same picture ground distribution positive polarity and negative polarity, and to the polarity complementation of this first selection wire voltage of bestowing and the voltage that this second selection wire is bestowed.
8, driving method according to claim 7, it is characterized in that wherein when those first selection wires are bestowed to all under same picture voltage systematicness ground distribution positive polarity and negative polarity, all odd number first selection wires from those first selection wires are bestowed the voltage of positive polarity, and all even number first selection wires in those first selection wires are bestowed the voltage of negative polarity, and the polarity complementation of the voltage that those first selection wires are bestowed and the voltage that those second selection wires are bestowed.
9, driving method according to claim 1, it is characterized in that voltage scrambling that wherein those first selection wires are bestowed to all under same picture ground distribution positive polarity and negative polarity, and to the polarity complementation of this first selection wire voltage of bestowing and the voltage that this second selection wire is bestowed.
10, driving method according to claim 1, it is characterized in that wherein when the data voltage that this data line is bestowed is positive polarity, the voltage that this first selection wire is bestowed is positive polarity, when the data voltage that this data line is bestowed is negative polarity, the voltage that this first selection wire is bestowed is negative polarity, and the polarity complementation of the voltage that those first selection wires are bestowed and the voltage that those second selection wires are bestowed.
11, driving method according to claim 1, it is characterized in that wherein when the data voltage that this data line is bestowed is positive polarity, the voltage that this first selection wire is bestowed is negative polarity, when the data voltage that this data line is bestowed is negative polarity, the voltage that this first selection wire is bestowed is positive polarity, and the polarity complementation of the voltage that those first selection wires are bestowed and the voltage that those second selection wires are bestowed.
12, a kind of driving method is applicable to via one first selection wire and one second selection wire and selects to drive a pixel, it is characterized in that this driving method comprises:
At polarity chron of each frame updating, to this first selection wire voltage of bestowing and the voltage that this second selection wire is bestowed, but alternate polarity, and the polarity complementation of the voltage that this first selection wire is bestowed and the voltage that this second selection wire is bestowed.
13, driving method according to claim 12 is characterized in that wherein said mode to this first selection wire voltage of bestowing and the alternating voltage changed polarity that this second selection wire is bestowed is to bestow the polarity of voltage according to a pre-defined rule conversion.
14, driving method according to claim 13 is characterized in that wherein said pre-defined rule is to change the polarity of bestowing voltage in the image time interval of a specific quantity.
15, driving method according to claim 12 is characterized in that wherein said mode to this first selection wire voltage of bestowing and the alternating voltage changed polarity that this second selection wire is bestowed is to bestow the polarity of voltage according to mode conversion at random.
16, driving method according to claim 15, the mode that it is characterized in that wherein bestowing according to mode conversion at random the polarity of voltage is to change the polarity of bestowing voltage in the image time interval of random amount.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510077694XA CN100505020C (en) | 2005-06-22 | 2005-06-22 | Method and apparatus for driving double-selection diode liquid crystal display |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200510077694XA CN100505020C (en) | 2005-06-22 | 2005-06-22 | Method and apparatus for driving double-selection diode liquid crystal display |
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| Publication Number | Publication Date |
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| CN1885397A CN1885397A (en) | 2006-12-27 |
| CN100505020C true CN100505020C (en) | 2009-06-24 |
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| CNB200510077694XA Expired - Fee Related CN100505020C (en) | 2005-06-22 | 2005-06-22 | Method and apparatus for driving double-selection diode liquid crystal display |
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| TWI496130B (en) * | 2013-03-13 | 2015-08-11 | Au Optronics Corp | Display and method for transmitting signals therein |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5784042A (en) * | 1991-03-19 | 1998-07-21 | Hitachi, Ltd. | Liquid crystal display device and method for driving the same |
| CN1320255A (en) * | 1998-08-03 | 2001-10-31 | 维塔利·亚历山德罗维奇·沃洛金 | Method and device for driving a screen and the screen therefor |
| CN1573902A (en) * | 2003-06-24 | 2005-02-02 | 恩益禧电子股份有限公司 | Display control circuit |
-
2005
- 2005-06-22 CN CNB200510077694XA patent/CN100505020C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5784042A (en) * | 1991-03-19 | 1998-07-21 | Hitachi, Ltd. | Liquid crystal display device and method for driving the same |
| CN1320255A (en) * | 1998-08-03 | 2001-10-31 | 维塔利·亚历山德罗维奇·沃洛金 | Method and device for driving a screen and the screen therefor |
| CN1573902A (en) * | 2003-06-24 | 2005-02-02 | 恩益禧电子股份有限公司 | Display control circuit |
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| CN1885397A (en) | 2006-12-27 |
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