CN102915690A - Charge recovery device and relevant panel driving device and driving method - Google Patents
Charge recovery device and relevant panel driving device and driving method Download PDFInfo
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Abstract
The invention discloses a charge recovery device, which is applied to a panel display device. The charge recovery device comprises one or more of storage capacitors and one or more of switch modules, wherein the switch modules are coupled to the storage capacitors, are coupled to a plurality of loading capacitors by a plurality of source driving nodes, and are used for controlling charge flow between the loading capacitors and the storage capacitors, at a charge receiving period, the switch modules are configured to recover charge stored in the loading capacitors to the storage capacitors, and at a charge recycle period, the switch modules are configured to allocate the charge recovered in the storage capacitors to the loading capacitors again.
Description
Technical field
The present invention relates to a kind of electric charge retracting device and relevant board driving mchanism and driving method, relate in particular to a kind of utilization and reclaim the load electric charge, save the electric charge retracting device of driving power consumption and relevant board driving mchanism and driving method.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD) have that external form is frivolous, power consumption is few and a characteristic such as radiationless pollution, be widely used on the information products such as computer system, mobile phone, personal digital assistant (Personal Digital Assistant, PDA).The principle of work of liquid crystal display is to utilize liquid crystal molecule under different ordered states, light had different polarizations or refraction effect, therefore can control via the liquid crystal molecule of different ordered states the amount of penetrating of light, further produce the output light of varying strength, and the red, green, blue of different GTG intensity.
Generally speaking, the polarity of voltage that is applied to the liquid crystal material layer two ends must reverse at set intervals, causes nonvolatil destruction in order to avoid liquid crystal material to produce polarization, also in order to avoid image remaining (Image Sticking) effect.So, just develop the type of drive of four kinds of liquid crystal indicators: picture frame counter-rotating (Frame Inversion), line counter-rotating (Line Inversion), pixel inversion (Pixel Inversion) and some counter-rotating (Dot Inversion).When the mode with picture frame counter-rotating drove liquid crystal indicator, the data-signal of each picture frame was identical polar, and and the data-signal of next picture frame be opposite polarity.The line counter-rotating comprises row counter-rotatings (Row Inversion) and row counter-rotating (Column Inversion).When the mode with the row counter-rotating drove liquid crystal indicator, the data-signal of each row and the data-signal of its adjacent columns were opposite polarity.When the mode with the row counter-rotating drove liquid crystal indicator, the data-signal of every delegation and the data-signal of its adjacent lines were opposite polarity.When the mode with the picture element counter-rotating drove liquid crystal indicator, the data-signal that the data-signal of each picture element unit is adjacent the picture element unit was opposite polarity.Because the type of drive of picture element counter-rotating and some counter-rotating can provide better display quality, so the type of drive of picture element counter-rotating and some counter-rotating has become the type of drive that present liquid crystal indicator the most often uses.
Please refer to Fig. 1, Fig. 1 is the schematic diagram of prior art one liquid crystal display 10.Liquid crystal display 10 includes a display panels 100, a gate pole driver 110, one source pole driver 120 and has driver 130 altogether.Display panels 100 includes the picture element of arranging with matrix-style, is used for showing shades of colour.Copolar driver 130 is used to provide a reference potential Vcom to display panels 100.Gate pole driver 110 is sequentially exported gate drive signal VG1～VGN to display panels 100, to indicate the renewal sequential of each row picture element.Drive according to a counter-rotating, the source drive signal VS1～VSM of source electrode driver 120 outputs is opposite with adjacent source drive signal polarity.For instance, the polarity of source drive signal VSX, VSX+1 is opposite, and according to gate drive signal VG1～VGN, when the row of scanning changed, source drive signal VSX, VSX+1 carried out reversal of poles.That is to say, source electrode driver 120 must be sequentially alternately X on the display panels 100 is capable and X+1 capable on load capacitance charge/discharge corresponding to picture element to positive polarity or negative polarity, its power consumption is large and do not meet economic benefit.
In order to reduce driving power consumption, liquid crystal display 10 can be utilized extra switch module, gap between each row picture element scanning, (column direction) connects the load capacitance of adjacent picture element in the horizontal direction, utilize charge share, the payment positive-negative polarity is to alleviate the burden of source electrode driver 120.Yet the effect that reduces driving power consumption with payment polarity is limited, as how more the mode of power saving realize that a counter-rotating drives, and has become one of effort target of industry.
Summary of the invention
Therefore, fundamental purpose of the present invention namely is to provide a kind of electric charge retracting device and relevant board driving mchanism and driving method.
The present invention discloses a kind of electric charge retracting device, is used for a display apparatus.This electric charge retracting device comprises one or more storage capacitors; And one or more switch module, it is coupled to this one or more storage capacitors, and is coupled to a plurality of load capacitances through a plurality of source drive nodes, in order to control the flow of charge between these a plurality of load capacitances and this one or more storage capacitors; Wherein in an electric charge was between payback period, this one or more switch module was configured to the electric charge that these a plurality of load capacitances are stored and is recycled to this one or more storage capacitors; And in during this electric charge recycling, this one or more switch module is configured to the electric charge that this one or more storage capacitors reclaims is redistributed to this a plurality of load capacitances.
The present invention also discloses a kind of board driving mchanism, comprises the one source pole driver, in order to export a plurality of source drive signals at a plurality of source drive nodes; An and electric charge retracting device, it is coupled to a plurality of load capacitances through a plurality of source drive nodes, in during the polarity switch transition of these a plurality of source drive signals of being exported at these a plurality of source drive nodes, sequentially carry out the operation of an electric charge reclaimer operation and electric charge recycling; Wherein in this electric charge reclaimer operation, this electric charge retracting device is configured to the electric charge that these a plurality of load capacitances are stored and is recycled to one or more inner storage capacitors; And in the operation of electric charge recycling, this electric charge retracting device is configured to the electric charge that this one or more storage capacitors reclaims is redistributed to this a plurality of load capacitances.
The present invention also discloses a kind of driving method, is used for driving a display apparatus.This driving method comprises and sequentially carries out following step: provide a plurality of source drive signals of one first polar configurations state through a plurality of source drive nodes, with a plurality of load capacitances that charge storage to these a plurality of source drive electric charges are coupled; Carry out an electric charge reclaimer operation, so that the stored electric charge of these a plurality of load capacitances is recycled to one or more storage capacitors; Carry out the operation of electric charge recycling, the electric charge that this one or more storage capacitors was reclaimed is redistributed to this a plurality of load capacitances; And these a plurality of source drive signals that one second polar configurations state is provided through these a plurality of source drive nodes.
The present invention also discloses a kind of electric charge retracting device, is used for a display apparatus, and this electric charge retracting device comprises: first and second storage capacitors; One first switch module, it is coupled to one first storage capacitors and the multi-source utmost point drives one first central source drive node of node; And a second switch module, it is coupled to one second central source drive node of one second storage capacitors and this a plurality of source drive nodes.Each comprises in the middle of this first and second switch module: first group of switch is coupled between the central one of a reference potential and this first and second storage capacitors; And second group of switch, be respectively coupled between this first and second source drive node central one and the one in the middle of this first and second storage capacitors.
The present invention also discloses a kind of electric charge retracting device, comprising: a storage capacitors; And a switch module, it is coupled to first and second source drive node in the middle of this storage capacitors and a plurality of source drive node.This switch module comprises: first group of switch, and it comprises: first and second switch is coupled to respectively the two ends of this storage capacitors and is coupled to a reference potential; And second group of switch, it comprises: the 3rd and the 4th switch is coupled to respectively the two ends of this storage capacitors and is coupled to this first source drive node, and the 5th and the 6th switch is coupled to respectively the two ends of this second storage capacitors and is coupled to this second source drive node.
Cooperate detailed description and claims of following diagram, embodiment at this, with on address other purpose of the present invention and advantage and be specified in after.
Description of drawings
Fig. 1 is the schematic diagram of prior art one liquid crystal display.
Fig. 2 is the schematic diagram of the embodiment of the invention one panel drive unit.
Fig. 3 A is the schematic diagram of the thin section structure of an electric charge retracting device in the board driving mchanism of Fig. 2.
Fig. 3 B to Fig. 3 G is the sequential chart of coherent signal among Fig. 3 A, device operation.
Fig. 4 A is the schematic diagram of an alternate embodiment of the electric charge retracting device of Fig. 3 A.
Fig. 4 B to Fig. 5 D is the sequential chart of coherent signal among Fig. 3 A, device operation
Fig. 6 is the schematic diagram of an alternate embodiment of the board driving mchanism of Fig. 2.
Fig. 7 A is the schematic diagram of thin section structure of the electric charge retracting device of Fig. 6.
Fig. 7 B is the schematic diagram of an alternate embodiment of the electric charge retracting device of Fig. 7 A.
Fig. 8 A is the sequential chart of coherent signal among Fig. 7 A, device operation.
Fig. 8 B is the sequential chart of coherent signal among Fig. 7 B, device operation.
Fig. 9 is the schematic diagram that the embodiment of the invention one drives flow process.
Wherein, description of reference numerals is as follows:
CL1～CLM load capacitance
N1～NM source drive node
VS1～VSM source drive signal
VN1～VNM node voltage
VG1, VG2, VGN gate drive signal
The Vcom reference potential
V0 ,-V0 voltage
During the Ts polarity switch transition
The Tr electric charge is between payback period
During the Tb charge balance
During the Tu electric charge recycling
Tr1, Tu1 phase one
Tr2, Tu2 subordinate phase
10 liquid crystal display
100 display panels
110 gate pole drivers
120,200 source electrode drivers
130 copolar drivers
20 board driving mchanisms
210 (1,2)～210 (M-1, M), 610 electric charge retracting devices
211_X, 211_X+1,411_X storage capacitors
212_X the first switch module
212_X+1 second switch module
The 412_X switch module
214 (1,2)～214 (M-1, M), 414 (1, balance cock
2)～414(M-1，M)
213_1～213_M, 413_1～413_M node switch
216_1,216_2,216_3,216_4,216_5, switch
216_6、216_7、216_8、416_1、416_2、
416_3、416_4、416_5、416_6
First group of switch of 415_1
Second group of switch of 415_2
610 electric charge retracting devices
90 drive flow process
900～910 steps
Embodiment
Please refer to Fig. 2, Fig. 2 is the schematic diagram of the embodiment of the invention one panel drive unit 20.Board driving mchanism 20 provides source drive signal VS1～VSM to a display panel, for example the display panels 100 of Fig. 1.It is noted that, load capacitance CL1～CLM is that driven middle picture element is in the equivalent capacity at panel two ends in the display panels 100.Board driving mchanism 20 includes one source pole driver 200 and electric charge retracting device electric charge retracting device 210 (1,2)～210 (M-1, M).Source electrode driver is exported respectively source drive signal VS1～VSM to load capacitance CL1～CLM in order to by source drive node N1～NM, to upgrade the color content of picture element.Electric charge retracting device 210 (1,2) (M-1～210, M) in the middle of each, electric charge retracting device 210 (X for example, X+1) (wherein X is the integer of 1～M) during the polarity switch transition of source drive signal VSX that source drive node NX and NX+1 export and VSX+1 in, sequentially carry out the operation of an electric charge reclaimer operation and electric charge recycling, to save power consumption.During this so-called polarity switch transition namely source drive signal VSX from first standard be converted to second accurate and simultaneously source drive signal VSX+1 be converted to the transition period of first standard from the second standard, or on the contrary, source drive signal VSX is converted to first standard and source drive signal VSX+1 is converted to the transition period of second standard from first standard from the second standard.Specifically, in the electric charge reclaimer operation, electric charge retracting device 210 (X, the X+1) electric charge that load capacitance CLX～CLX+1 is stored is recycled to inner storage capacitors.In the operation of electric charge recycling, the electric charge that electric charge retracting device 210 (X, X+1) reclaims storage capacitors is redistributed to load capacitance CLX～CLX+1.Electric charge retracting device 210 (1,2)～210 (M-1, M) can be integrated into an integrated circuit from source electrode driver 200 or Independent is set to different circuit.
Please refer to Fig. 3 A, Fig. 3 A is the schematic diagram of the thin section structure of electric charge retracting device 210 (X, X+1).As shown in the figure, electric charge retracting device 210 (X, X+1) comprises one first storage capacitors 211_X, one second storage capacitors 211_X+1, one first switch module 212_X, a second switch module 212_X+1 and a balance cock 214 (X, X+1).The first switch module 212_X is in order to controlling the flow of charge between the first load capacitance CLX and the first storage capacitors 211_X, and second switch module 212_X+1 is in order to control the flow of charge between the second load capacitance CLX+1 and the second storage capacitors 211_X+ 1.
First and second switch module 212_X, 212_X+1 for example comprise respectively first group of switch and the second group of switch that includes separately.First group of switch among the first switch module 212_X for example comprises switch 216_2 and 216_5, is coupled between reference potential Vcom and the first storage capacitors 211_X; Similarly, first group of switch among the second switch module 212_X+1 for example comprises switch 216_4 and 216_7, is coupled between reference potential Vcom and the second storage capacitors 211_X+1.In addition, second group of switch among the first switch module 212+X for example comprises switch 216_1 and 216_6, is coupled between the first source drive node NX and the first storage capacitors 211_X; And second group of switch among the second switch module 212+X+1 for example comprises switch 216_3 and 216_8, is coupled between the second source drive node NX+1 and the second storage capacitors 211_X+ 1.
About the electric charge retracting device 210 (X shown in Fig. 3 A, X+1) concrete operations, please continue the 3B with reference to figure, Fig. 3 B is the sequential chart of source drive signal VSX, VSX+1, switch 216_1～216_8,214 (X, X+1) and node voltage VNX, VNX+1 Ts during a polarity switch transition.Ts during the polarity switch transition, source electrode driver 200 preferably are configured the source drive signal are in high impedance status, so that load capacitance CLX, CLX+1 and storage capacitors 211_X, 211_X+1 can distribute electric charge independently.Reclaim the starting point that operates with recycling at electric charge, the initial voltage polarity of node voltage VNX, VNX+1 is opposite, and the meaning is that source drive signal VSX, VSX+1 are respectively a positive voltage V0 and one negative voltage-V0 by the position standard before being blocked.
Next, sequentially carrying out electric charge reclaims and the operation that recycles.At first, at electric charge Tr between payback period, the first switch module 212_X is in parallel with the first storage capacitors 211_X and load capacitance CLX forward, and two switch module 212_X+1 are in parallel with the second storage capacitors 211_X+1 and load capacitance CLX+1 forward.More specifically, at electric charge between payback period in the Tr, the first switch module 212_X or second switch module 212X+1 are coupled to reference potential Vcom with the first or second storage capacitors 211_X of correspondence or an end of the one in the middle of the 211_X+1, and the source drive node NX or the NX+1 that the other end of storage capacitors 211_X or 211_X+1 are coupled to correspondence, the result just can be recycled to storage capacitors 211_X or 211_X+1 with the load capacitance CLX of correspondence or the electric charge of CLX+1.Thus, utilize electric charge to redistribute, the reference potential Vcom direction that node voltage VNX provides from positive voltage V0 toward copolar driver 130 reduces, and node voltage VNX+1 increases from negative voltage-V0 toward reference potential Vcom direction.Then, Tb during a charge balance, switch 216_1～216_8 opens circuit, only balance cock 214 (X, X+1) conducting so that node voltage VNX, VNX+1 all balance to reference potential Vcom.At last, Tu during electric charge recycling, the first switch module 212_X reverse parallel connection the first storage capacitors 211_X and load capacitance CLX, second switch module 212_X+1 reverse parallel connection the second storage capacitors 211_X and load capacitance CLX.More specifically, during electric charge recycling in the Tu, switch module 212_X or 212_X+1 change the first end of the storage capacitors 211_X of correspondence or 212_X into and are coupled to corresponding source drive node NX and NX+1, and the second end of storage capacitors 211_X or 212_X changed into be coupled to reference potential Vcom, the electric charge that the result just reclaims storage capacitors 211_X or 212_X is redistributed to this load capacitance CL_X or CL_X.Therefore, node voltage VNX is from the past negative voltage of reference potential Vcom-the V0 direction reduces, and node voltage VNX+1 increases from reference potential Vcom toward positive voltage V0 direction.Thus, after Ts during the polarity switch transition finished, the wasted work that source electrode driver 200 can be few just can be urged to node voltage VNX, VNX+1 the target level after source drive signal VSX, the VSX+1 counter-rotating.
Because electric charge retracting device 210 (X, X+1) character of circuit symmetrical and source drive signal VSX, VSX+1 polarity cycle alternation, in another embodiment, first, second switch module 212_X, 212_X+1 also can be at electric charge Tr between payback period, elder generation reverse parallel connection storage capacitors and load capacitance, Tu during the electric charge recycling again, electric capacity and load capacitance are deposited in forward Federal Reserve in parallel, and reach identical electric charge distribution effects, shown in Fig. 3 C.In addition, if the initial value of node voltage VNX is negative polarity, node voltage VNX+1 initial value is positive polarity, and the switching operation shown in Fig. 3 B and Fig. 3 C is also applicable.So, if operate to explain with double reversal, just can be with the switching operation of 3B figure or Fig. 3 C permutation and combination in addition, the result can reach the reverse turn operation shown in Fig. 3 D to Fig. 3 G, and its associative operation is well known to those of ordinary skill in the art, is not repeated herein.
In sum, in fitting in during the polarity switch transition that the polarity of source drive signal is alternately reversed according to a counter-rotating driving, first at two source drive signals in the reference potential Vcom, with a load capacitance just/the negative polarity electric charge is recycled to storage capacitors, and next at source drive signal spans reference potential Vcom and after the reversing, to bear/the positive polarity charge feedback is to load capacitance, to produce in advance the source drive signal after the counter-rotating.Thus, source electrode driver 200 only must be finely tuned the source drive signal, can reach the level of target, and driving power consumption can significantly reduce.
Outside the embodiment except the thin section structure of the electric charge retracting device 210 (X, X+1) shown in Fig. 3 A, according to another embodiment of the present invention, the thin section structure of electric charge retracting device 210 (X, X+1) also can be shown in Fig. 4 A.As shown in the figure, electric charge retracting device 210 (X, X+1) includes a switch module 412 (X, X+1), a balance cock 414 (X, X+1) and a storage capacitors 411_X.Switch module 412 (X, X+1) for example can include one first group of switch 415_1 and one second group of switch 415_2.First group of switch 415_1 can include switch 416_1,416_2, is coupled between a reference potential and this storage capacitors.Second group of switch 415_2 can include 416_3～416_6, is coupled to 411_X between first and second source drive node NX and NX+1 and the storage capacitors.
About the electric charge retracting device 210 (X shown in Fig. 4 A, X+1) concrete operations, please continue the 4B with reference to figure, Fig. 4 B is the sequential chart of source drive signal VSX, VSX+1, switch 416_1～416_6,414 (X, X+1) and node voltage VNX, VNX+1 Ts during the polarity switch transition.Electric charge during the polarity switch transition in the Ts is between payback period among the phase one Tr1 in the Tr, switch 416_2,416_3 conducting, rest switch cuts off, with the positive charge that reclaims load capacitance CLX to storage capacitors 411_X.At electric charge between payback period among the subordinate phase Tr2 in the Tr, switch 416_1,416_6 conducting, rest switch cuts off, to reclaim the negative charge of load capacitance CLX+1 anti-phasely.More specifically, in the phase one Tr1 of electric charge Tr between payback period, switch module 412 (X, X+1) is coupled to reference potential Vcom with the first end of this storage capacitors 411_X, and the second end of storage capacitors 411_X is coupled to source drive node NX.And in the subordinate phase Tr2 of electric charge Tr between payback period, switch module 412 (X, X+1) will store first end that electric 411_X holds and change into and be coupled to the second source drive node NX+1, and the second end of storage capacitors changed into be coupled to this reference potential Vcom.Similarly, Tb during charge balance, switch 416_1～416_6 opens circuit, only balance cock 414 (X, X+1) conducting, with balance node voltage VNX, VNX+1 to reference potential Vcom.Then, among the phase one Tu1 during the electric charge recycling in the Tu, switch 416_1,416_4 conducting, rest switch all cuts off, and to utilize the electric charge of storage capacitors 411_X anti-phasely, reduces node voltage VNX.At last, among the subordinate phase Tu2 during the electric charge recycling in the Tu, switch 416_2,416_5 conducting, rest switch all cuts off, to utilize the electric charge of storage capacitors 411_X, lifting section point voltage VNX+1 with utilizing positive.
It is noted that, in another embodiment during the electric charge recycling among the Tu switching operation of first, second stage Tu1, Tu2 commutative, shown in 4C figure.In addition, if the initial value of node voltage VNX is negative polarity, node voltage VNX+1 initial value is positive polarity, and electric charge is the switching operation of first, second stage Tr1, Tr2 palpus exchange among the Tr between payback period, shown in 4D figure and 4E figure.In addition, if operate to explain with double reversal, just can be with the switching operation of 4B-4C figure and 4D-4E figure permutation and combination in addition, its associative operation is well known to those of ordinary skill in the art, is not repeated herein
Electric charge retracting device 210 (X shown in comparison diagram 3A and Fig. 4 A, X+1) with and corresponding switching manipulation sequential, because the electric charge retracting device 210 (X of Fig. 3, X+1) possess two switch module 212_X and 212_X+1 are arranged, therefore at electric charge between payback period in the Tr, can be simultaneously that first and second load capacitance CLX and CLX+1 is stored electric charge is recycled to respectively first and second storage capacitors 211_X and 211_X+1, and during electric charge recycling in the Tb, the electric charge that can be simultaneously first and second storage capacitors 211_X and 211_X+1 be reclaimed distributes respectively first and second load capacitance CLX and CLX+1 again.Otherwise, electric charge retracting device 210 (X shown in Fig. 4 A, X+1) owing to only possessing single switch module 412 (X are arranged, X+1), though therefore be electric charge between payback period during Tr or the electric charge recycling Tb all be further divided into for two stages with sequentially for different load capacitance CLX and CLX+1 charge/discharge.Electric charge retracting device 210 (X, X+1) that it should be noted that Fig. 3 does not limit the use of the switching manipulation sequential shown in the electric charge retracting device 210 (X, X+1).In other embodiments, two switch module 212_X and 212_X+1 also can operate in proper order.
Except a counter-rotating drives, electric charge retracting device 210 (X, X+1) also can be applicable to row counter-rotating (Column Inversion) drives, its difference is that otherwise polarity phase source drive signal VSX, VSX+1 must be when the gate drive signal do not switch the driving row at every turn, reverse, but after whole picture is all finished renewal, the ability changed polarity.In the case, please refer to Fig. 5 A to Fig. 5 D, its switching sequence is the circulation of the switching sequence shown in Fig. 4 B to the 4E figure.In Fig. 5 A to Fig. 5 D, after node voltage VNX, VNX+1 finish polarity conversion operations, Ts2 during polarity switch transition next time still, repeat similarly switching manipulation, to reach the requirement of line inversion driving, the result can simplify the control of switch 416_1～416_6,414 (X, X+1).
Otherwise the operation instructions of above-mentioned board driving mchanism 20 is polarity phase source drive signal VSX, VSX+1 for how, in fact, along with the evolution of LCD drive method, produces reverse turn operation miscellaneous.For this reason, please refer to Fig. 6, Fig. 7 A and Fig. 7 B, Fig. 6 is the schematic diagram of an alternate embodiment one panel drive unit 60 of board driving mchanism 20, wherein, be to use an electric charge retracting device 610 of sharing with the main difference of the embodiment of Fig. 2, but not a plurality of electric charge retracting devices 210 (1,2)～210 (M-1, M).In addition, similarly, electric charge retracting device 610 can be integrated into an integrated circuit from source electrode driver 200 or Independent is set to different circuit.
Fig. 7 A is that Fig. 7 B is the schematic diagram of the electric charge retracting device 610 of another embodiment according to the thin section structural representation of the thin section structure of the electric charge retracting device 610 shown in Figure 6 of an embodiment.Electric charge retracting device 610 at Fig. 7 A is similar with Fig. 3 A those shown, and difference mainly is all to have installed between all source drive node N1～NM and switch module node switch 213_1～213_M.Similarly, the electric charge retracting device 610 of Fig. 7 B is similar with Fig. 4 A those shown, and difference mainly is all to have installed between all source drive node N1～NM and switch module node switch 413_1～413_M.Thus, switch module 212_X, 212_X+1,412_X can be connected to a plurality of source drive nodes simultaneously, to meet different reverse turn operations.
About the concrete operations of the electric charge retracting device 610 shown in Fig. 7 A and Fig. 7 B, respectively shown in Fig. 8 A and Fig. 8 B.Fig. 8 A is similar to the type of drive of Fig. 3 B, Fig. 4 B respectively to Fig. 8 B, difference mainly is the 413_X and all only Ts conductings during the polarity switch transition of corresponding source drive signal VNX and VNX+1 of 413_X+1 among node switch 213_X and 213_X+1 and Fig. 8 A among Fig. 7 A, reclaims and electric charge recycling mechanism with the control electric charge.The change type of the switching manipulation that other is possible also can be analogized and got by the node switching manipulation mode of the type of drive shown in Fig. 3 C～Fig. 3 G, the 4C figure～Fig. 5 D, is not repeated herein.Thus, even the type of drive of reversal of poles changes, node switch 213_1～213_M, 413_1～413_M can provide extra control elasticity, to meet the different needs.
The operating process of board driving mchanism 20 can be summarized as one and drive flow process 90, as shown in Figure 9.Drive flow process 90 and include following step:
Step 900: beginning.
Step 902: provide a plurality of source drive signals of one first polar configurations state through the source drive node, with the load capacitance that charge storage is coupled to the source drive electric charge.
Step 904: carry out an electric charge reclaimer operation, be recycled to one or more storage capacitors with the electric charge that load capacitance is stored.
Step 906: carry out the operation of electric charge recycling, so that the electric charge that storage capacitors was reclaimed is redistributed to load capacitance.
Step 908: the source drive signal that one second polar configurations state is provided through the source drive node.
Step 910: finish.
The details that drives flow process 90 can with reference to the description of electric charge retracting device 210 (1,2)～210 (M-1, M) among each embodiment of preamble or 610, be not repeated herein.
In the prior art, implement the some counter-rotating such as wish and drive, on the contrary source electrode driver 120 must be constantly alternately with the load capacitance charge/discharge to polarity mutually, power consumption is very large.Even utilize extra switch module, gap between each row picture element scanning, (column direction) connects the load capacitance of adjacent picture element in the horizontal direction, utilizes charge share, the payment positive-negative polarity, to alleviate the burden of source electrode driver 120, effect is also limited.In comparison, the present invention is Ts during the polarity switch transition, utilizes storage capacitors, reclaims the electric charge of load capacitance, and is utilizing switching manipulation, recycles this electric charge anti-phasely, and is accurate with the position that changes in advance the source drive node.Thus, the power consumption that source electrode driver 200 can be lower is urged to the node voltage of source drive node the current potential of source drive signal appointment.
In sum, the present invention utilizes and reclaims and the electric charge of anti-phase load capacitance, the node voltage of source drive node is changed to current potential near target source drive signal in advance, to reduce the power consumption of source electrode driver.
The above only is the preferred embodiments of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (33)
1. an electric charge retracting device is used for a display apparatus, it is characterized in that, this electric charge retracting device comprises:
One or more storage capacitors; And
One or more switch module, it is coupled to this one or more storage capacitors, and is coupled to a plurality of load capacitances through a plurality of source drive nodes, in order to control the flow of charge between these a plurality of load capacitances and this one or more storage capacitors;
Wherein in an electric charge was between payback period, this one or more switch module was configured to the electric charge that these a plurality of load capacitances are stored and is recycled to this one or more storage capacitors; And
During electric charge recycling, this one or more switch module is configured to the electric charge that this one or more storage capacitors reclaims is redistributed to this a plurality of load capacitances.
2. such as the 1st described electric charge retracting device of claim, it is characterized in that, this electric charge between payback period with this electric charge recycling during sequentially occur in during the polarity switch transition of a plurality of source drive signals that these a plurality of source drive nodes couple in.
3. such as the 2nd described electric charge retracting device of claim, it is characterized in that,, more have during the charge balance between payback period and between during this electric charge recycling between this electric charge, in the middle of central a plurality of source drive signals at least both voltage balance each other.
4. such as the 1st described electric charge retracting device of claim, it is characterized in that, comprise in the middle of this one or more switch module:
One first switch module, it is coupled to one first central storage capacitors of this one or more storage capacitors and one first source drive node in the middle of these a plurality of source drive nodes; And
One second switch module, it is coupled to one second central storage capacitors of this one or more storage capacitors and one second source drive node in the middle of these a plurality of source drive nodes.
5. such as the 4th described electric charge retracting device of claim, it is characterized in that, in the starting point of this electric charge between payback period, otherwise the source drive signal that this first and second source drive node couples has mutually polarity.
6. such as the 4th described electric charge retracting device of claim, it is characterized in that, each comprises in the middle of this first and second switch module:
First group of switch is coupled between the central one of a reference potential and this first and second storage capacitors; And
Second group of switch is respectively coupled between this first and second source drive node central one and the one in the middle of this first and second storage capacitors.
7. such as the 6th described electric charge retracting device of claim, it is characterized in that,
First group of switch of this of this first switch module comprises that first and second switch is coupled to respectively the two ends of this first storage capacitors and is coupled to this reference potential;
First group of switch of this of this second switch module comprises that the 3rd and the 4th switch is coupled to respectively the two ends of this second storage capacitors and is coupled to this reference potential;
Second group of switch of this of this first switch module comprises that the 5th and the 6th switch is coupled to respectively the two ends of this first storage capacitors and is coupled to this first source drive node; And
Second group of switch of this of this second switch module comprises that the 7th and the 8th switch is coupled to respectively the two ends of this second storage capacitors and is coupled to this second source drive node.
8. such as claim the 7th described electric charge retracting device, it is characterized in that,
This electric charge in during a polarity switch transition between payback period in, this second, the 4th, the 5th and minion close and to be in first conducting/dissengaged positions, and this first, the 3rd, the 6th and the 8th switch is in one of opposite the second conducting/dissengaged positions; And
During this electric charge recycling in during this polarity switch transition, this the second, the 4th, the 5th and the 7th switching over to the second conducting/dissengaged positions, otherwise and this first, the 3rd, the 6th and the 8th switching over to this first conducting/dissengaged positions mutually.
9. such as the 1st described electric charge retracting device of claim, it is characterized in that, one in the middle of this one or more switch module is coupled to the storage capacitors in the middle of this one or more storage capacitors, and is coupled to simultaneously one first source drive node and one second source drive node in the middle of these a plurality of source drive nodes.
10. such as the 9th described electric charge retracting device of claim, it is characterized in that, in the starting point of this electric charge between payback period, otherwise the source drive signal that this first and second source drive node couples has mutually polarity.
11. such as the 9th described electric charge retracting device of claim, it is characterized in that, this switch module comprises:
First group of switch is coupled between a reference potential and this storage capacitors; And
Second group of switch is coupled between this first and second source drive node and this storage capacitors.
12. such as the 11st described electric charge retracting device of claim, it is characterized in that,
This first group of switch comprises that first and second switch is coupled to respectively the two ends of this storage capacitors and is coupled to this reference potential; And
This second group of switch comprises: the 3rd and the 4th switch is coupled to respectively the two ends of this storage capacitors and is coupled to this first source drive node, and the 5th and the 6th switch is coupled to respectively the two ends of this second storage capacitors and is coupled to this second source drive node.
13. such as claim the 12nd described electric charge retracting device, it is characterized in that,
This electric charge in during a polarity switch transition is in the phase one between payback period, this second and third switch is in first conducting/dissengaged positions, this the first and the 6th switch is in one of opposite the second conducting/dissengaged positions, and the 4th and the 5th switch is in dissengaged positions;
In the subordinate phase of this electric charge in during this polarity switch transition between payback period, this second and third switching over is to this second conducting/dissengaged positions, otherwise this first and the 6th switching over is to phase this first conducting/dissengaged positions, and the 4th and the 5th switch is in dissengaged positions;
In the phase one in during this electric charge recycling in during this polarity switch transition, this the first and the 4th switch is in first conducting/dissengaged positions, this the second and the 5th switch is in one of opposite the second conducting/dissengaged positions, and the 3rd and the 6th switch is in dissengaged positions; And
In the subordinate phase in during this electric charge recycling in during this polarity switch transition, this the first and the 4th switching over is to this second conducting/dissengaged positions, otherwise this second and the 5th switching over is to phase this first conducting/dissengaged positions, and the 3rd and the 6th switch is in dissengaged positions.
14. such as claim the 1st described electric charge retracting device, it is characterized in that, also include a plurality of node switches, the one source pole that this each node switch is coupled to these a plurality of source drive nodes drives between the switch module of node and this one or more switch module.
15. such as claim the 14th described electric charge retracting device, it is characterized in that, corresponding this electric charge of each this source drive node that couples in the middle of these a plurality of switches between payback period with this electric charge recycling during conducting.
16. a board driving mchanism is characterized in that, comprising:
The one source pole driver is in order to export a plurality of source drive signals at a plurality of source drive nodes; And
The 1st described electric charge retracting device of claim, it is coupled to this a plurality of source drive signals.
17. a driving method be used for to drive a display apparatus, it is characterized in that, this driving method comprises and sequentially carries out following step:
Provide a plurality of source drive signals of one first polar configurations state through a plurality of source drive nodes, with a plurality of load capacitances that charge storage to these a plurality of source drive electric charges are coupled;
Carry out an electric charge reclaimer operation, so that the stored electric charge of these a plurality of load capacitances is recycled to one or more storage capacitors;
Carry out the operation of electric charge recycling, the electric charge that this one or more storage capacitors was reclaimed is redistributed to this a plurality of load capacitances; And
These a plurality of source drive signals of one second polar configurations state are provided through these a plurality of source drive nodes.
18. such as the 17th described driving method of claim, it is characterized in that, more be included between the operation of this electric charge reclaimer operation and this electric charge recycling, carry out charge balance operation, with the voltage of these a plurality of source drive signals of balance.
19. such as the 17th described driving method of claim, it is characterized in that, the step of this electric charge reclaimer operation comprises that the same time is recycled to respectively first and second central storage capacitors of this one or more storage capacitors with the central stored electric charge of first and second load capacitance of these a plurality of load capacitances.
20. such as the 17th described driving method of claim, it is characterized in that, the step of this electric charge recycling operation comprises that the electric charge that at one time first and second storage capacitors in the middle of this one or more storage capacitors is reclaimed is respectively allocated to first and second central load capacitance of these a plurality of load capacitances again.
21. such as the 17th described driving method of claim, it is characterized in that, the step of this electric charge reclaimer operation is included in different time and sequentially the central stored electric charge of first and second load capacitance of these a plurality of load capacitances is recycled to respectively first and second central storage capacitors of this one or more storage capacitors.
22. such as the 17th described driving method of claim, it is characterized in that, the step of this electric charge recycling operation is included in electric charge that different time sequentially reclaims first and second storage capacitors in the middle of this one or more storage capacitors and is respectively allocated to first and second load capacitance in the middle of these a plurality of load capacitances again.
23. an electric charge retracting device is used for a display apparatus, it is characterized in that, this electric charge retracting device comprises:
First and second storage capacitors;
One first switch module, it is coupled to one first storage capacitors and the multi-source utmost point drives one first central source drive node of node; And
One second switch module, it is coupled to one second source drive node in the middle of one second storage capacitors and these a plurality of source drive nodes,
Wherein each comprises in the middle of this first and second switch module:
First group of switch is coupled between the central one of a reference potential and this first and second storage capacitors; And
Second group of switch is respectively coupled between this first and second source drive node central one and the one in the middle of this first and second storage capacitors.
24. such as the 23rd described electric charge retracting device of claim, it is characterized in that, the starting point during a polarity switch transition of the source drive signal that this first and second source drive node couples, on the contrary these source drive signals have mutually polarity.
25. such as the 23rd described electric charge retracting device of claim, it is characterized in that,
First group of switch of this of this first switch module comprises that first and second switch is coupled to respectively the two ends of this first storage capacitors and is coupled to this reference potential;
First group of switch of this of this second switch module comprises that the 3rd and the 4th switch is coupled to respectively the two ends of this second storage capacitors and is coupled to this reference potential;
Second group of switch of this of this first switch module comprises that the 5th and the 6th switch is coupled to respectively the two ends of this first storage capacitors and is coupled to this first source drive node; And
Second group of switch of this of this second switch module comprises that the 7th and the 8th switch is coupled to respectively the two ends of this second storage capacitors and is coupled to this second source drive node.
26. such as the 23rd described electric charge retracting device of claim, it is characterized in that, more comprise a charge balance switch, be coupled between this first and second source drive node.
27. such as the 23rd described electric charge retracting device of claim, it is characterized in that, in the middle of this first and second switch module each more is coupled to other node in the middle of these a plurality of source drive nodes, and this electric charge retracting device also includes a plurality of node switches, and this each node switch is coupled between the one and the one in the middle of this first and second switch module of these a plurality of source drive nodes.
28. a board driving mchanism is characterized in that, comprising:
The one source pole driver, it has a plurality of source drive nodes, is used for exporting a plurality of source drive signals; And
The 23rd described electric charge retracting device of claim, it is coupled to first and second source drive node in the middle of these a plurality of source drive nodes.
29. an electric charge retracting device is used for a display apparatus, it is characterized in that, comprising:
One storage capacitors; And
One switch module, it is coupled to first and second source drive node in the middle of this storage capacitors and a plurality of source drive node, and wherein this switch module comprises:
First group of switch, it comprises: first and second switch is coupled to respectively the two ends of this storage capacitors and is coupled to a reference potential; And
Second group of switch, it comprises: the 3rd and the 4th switch is coupled to respectively the two ends of this storage capacitors and is coupled to this first source drive node, and the 5th and the 6th switch is coupled to respectively the two ends of this second storage capacitors and is coupled to this second source drive node.
30. such as the 29th described electric charge retracting device of claim, it is characterized in that, the starting point during a polarity switch transition of the source drive signal that this first and second source drive node couples, on the contrary these source drive signals have mutually polarity.
31. such as the 29th described electric charge retracting device of claim, it is characterized in that, more comprise a charge balance switch, be coupled between this first and second source drive node.
32. such as the 29th described electric charge retracting device of claim, it is characterized in that, this switch module more is coupled to other node in the middle of these a plurality of source drive nodes, and this electric charge retracting device also includes a plurality of node switches, and this each node switch is coupled between the one and this switch module of these a plurality of source drive nodes.
33. a board driving mchanism is characterized in that, comprising:
The one source pole driver, it has a plurality of source drive nodes, is used for exporting a plurality of source drive signals; And
The 29th described electric charge retracting device of claim, it is coupled to the one in the middle of these a plurality of source drive nodes.
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| CN2011102224696A CN102915690A (en) | 2011-08-04 | 2011-08-04 | Charge recovery device and relevant panel driving device and driving method |
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Application publication date: 20130206 |