CN102436791B - Control method and control device for display panel - Google Patents

Abstract

The invention discloses a control method for a display panel. The control method comprises the following steps of: conducting a first switch group so that a first voltage drive unit provides a first positive drive voltage to a first data line and a second voltage drive unit provides a first negative drive voltage to a second data line; conducting a second switch group so that a first charge storage unit has a positive-polarity common voltage and a second charge storage unit has a negative-polarity common voltage; conducting a third switch group so that the first data line and the second data line are grounded; and after the polarity conversion, charging the second data line according to a first voltage comparison result, and charging the first data line according to a second voltage comparison result.

Description

The control device and the control method that are used for display panel

Technical field

The present invention is about a kind of control device and control method that is applied to display panel, particularly about a kind of according to the voltage comparative result, and then selectivity is carried out control device and the control method of charge and discharge to data line.

Background technology

Flat-panel screens (for example, liquid crystal display) is widely used in various consumption electronic products, and when flat-panel screens was applied in portable apparatus, how reducing power consumption was a very important subject under discussion.

The principle of work of liquid crystal display is, the change by electric field to be changing the deflection of liquid crystal molecule, and then after affecting the deflection polarity of light, the content of corresponding display frame.Hence one can see that, and when utilizing flat-panel screens to come display frame, the image frame on panel must switch action by the polarity of data line or pixel cell and show.

Figure 1A to Fig. 1 C shows the electrical block diagram of control to display panel in prior art.For convenience of description, following graphic in, do not draw the pixel cell that display panel comprises, and control circuit also only illustrates the wherein data line of part.Other assembly that comprises as for display panel such as other assemblies such as Polarity Control line, time schedule controller skip over not to be carried.

Be simplified illustration, in Figure 1A to Fig. 1 C, the quantity of data line and voltage drive unit is all take four groups as example.In these graphic left sides, be respectively along from top to bottom direction: the first voltage drive unit 111, second voltage driver element 112, tertiary voltage driver element 113, the 4th voltage drive unit 114; Graphic right side direction from top to bottom provides respectively the first data line 101, the second data line 102, the 3rd data line 103 and the 4th data line 104.

Figure 1A represents that display panel is in the operation situation of phase one I.Wherein, the first period before carrying out the polarity conversion comprises phase one I and subordinate phase II, and the second phase after carrying out the polarity conversion comprises phase III III.

When carrying out the control of phase one I, the first data line 101, the 3rd data line 103 are connected to respectively the first voltage drive unit 111 and tertiary voltage driver element 113, and these two voltage drive units all provide positive driving voltage.On the other hand, the second data line 102,104 of the 4th data lines are connected to respectively second voltage driver element 112 and the 4th voltage drive unit 114, and these two voltage drive units all provide negative driving voltage.

In the control procedure of display panel, each data line offers the polarity of pixel cell and can just and between negative change.Figure 1B is before changing through polarity, each data line is connected to ground voltage, and makes the voltage of each data line all become the subordinate phase II of 0 volt.

Can be found out by Fig. 1 C, between each data line and voltage drive unit, the connected mode of the connected mode when phase III III during from phase one I is different, in this stage, data line is not to be connected in turn with voltage drive unit, but links together in staggered in twos mode.

That is to say, the first data line 101 and the 3rd data line 103 are connected to respectively second voltage driver element 112 and the 4th voltage drive unit 114 that negative driving voltage is provided at phase III III; On the other hand, the second data line 102 and 104 of the 4th data lines change into and are connected to respectively the first voltage drive unit 111 and the tertiary voltage driver element 113 that positive driving voltage is provided.

Fig. 1 D is in three phases corresponding to Figure 1A to Fig. 1 C, the variation schematic diagram of the voltage of the first data line.Can be found out by Fig. 1 D, the voltage of the first data line 101 is when phase one I, because be electrically connected on the positive driving voltage of output (the first voltage drive unit 111 for example+5V), and the voltage of the first data line 101 is maintained at+5 volts.

Carry out polarity conversion for follow-up afterwards, the data line that has positive driving voltage is originally first discharged, namely when subordinate phase II, the first data line 101 is connected to ground voltage, allow the voltage of the first data line 101 become 0 volt.

When display panel entered phase III III, the first data line 101 provided negative driving voltage (second voltage driver element 112 for example-5V), so its voltage also is reduced to-5 volts owing to being electrically connected on.

In Fig. 1 D, can see at the initial stage that enters phase III III, the current value of first data line 101 of flowing through has rapid variation, and produce one moment larger negative current, and then improve whole average current value and the increased power that makes consumption.Certainly, after phase III III, also can again carry out polarity conversion, carry out again the polarity conversion after also needing first all data lines to be connected to ground voltage this moment.Afterwards, data line receives the driving voltage of opposed polarity again.

Fig. 1 E is depicted as in three phases corresponding to Figure 1A to Fig. 1 C, the change in voltage schematic diagram of the second data line.Because the first data line 101 is exchanged at phase one I and phase III III with the voltage drive unit that is connected each other with the change in polarity of the second data line 102, so the change in voltage shown in Fig. 1 E and 1D figure oppositely.

In addition, can find out equally, finish at subordinate phase II, when beginning to enter phase III III, the electric current of the second data line 102 can produce rapid change, and produces larger forward current of moment.Therefore, whole average current value will improve, and this is just corresponding to larger consumed power.

Each figure explanation according to Figure 1A to Fig. 1 E, the driving voltage that can learn data line changes change back and forth between positive polarity and negative polarity, and before carrying out each time the polarity conversion, the whole ground connection of superimpose data line, cause the driving voltage that voltage drive unit each time provides all the voltage of data line must to be increased or reduces by 0 volt, and then cause the waste for no reason of electric energy.

Summary of the invention

in view of this, one aspect of the present invention provides a kind of charge share control method, be applied to display panel control device, this control device comprises the first data line, the second data line, the first voltage drive unit, the second voltage driver element, the first electric charge storage unit, the second electric charge storage unit, the first switches set, second switch group and the 3rd switches set, wherein said the first voltage drive unit and described second voltage driver element provided respectively the first positive driving voltage and the first negative driving voltage before the polarity conversion, provide respectively the second positive driving voltage and the second negative driving voltage after described polarity conversion, described charge share control method comprises following steps: (A) described the first switches set of conducting, so that described the first voltage drive unit provides the described first positive driving voltage to described the first data line, and make described second voltage driver element provide the described first negative driving voltage to described the second data line, (B) the described second switch group of conducting, transmit positive charge so that have the first data line of the described first positive driving voltage to described the first electric charge storage unit, and then make described the first electric charge storage unit have the positive polarity common voltage, and make the second data line with described first negative driving voltage transmit negative charge to described the second electric charge storage unit, and then make described the second electric charge storage unit have the negative polarity common voltage, (C) described the 3rd switches set of conducting is so that described the first data line and described the second data line are connected to ground voltage, and (D) after described polarity conversion, when the voltage of described the second data line and the described second positive driving voltage meet the first voltage comparative result, described the second data line is charged, and when the voltage of described the first data line and the described second negative driving voltage meet the second voltage comparative result, described the first data line is discharged.

The present invention provides a kind of charge share control device on the other hand, be applied to display panel, described charge share control device comprises: at least 1 switches set, comprise the first switches set, second switch group and the 3rd switches set, its conducting successively respectively before the polarity conversion, it all comprises the first sub-switch and the second sub-switch, and the first end of each described the first sub-switch all is electrically connected on first node, and the first end of described the second sub-switch all is electrically connected on Section Point; The first data line was connected to described first node before the polarity conversion, be connected to described Section Point after described polarity conversion; The second data line was connected to described Section Point before described polarity conversion, be connected to described first node after described polarity conversion; The first voltage drive unit is electrically connected to the second end of the first sub-switch in described the first switches set, and described the first voltage drive unit is before described polarity conversion, produce respectively the first positive driving voltage and the second positive driving voltage afterwards; The second voltage driver element is electrically connected to the second end of the second sub-switch in described the first switches set, and described second voltage driver element is before described polarity conversion, produce respectively the first negative driving voltage and the second negative driving voltage afterwards; The first electric charge storage unit is electrically connected to the other end of the first sub-switch in described second switch group, and described the first electric charge storage unit obtains the positive polarity common voltage by the conducting of described second switch group; The first comparator circuit, be electrically connected to described first node, the first voltage drive unit and this first electric charge storage unit respectively, described the first comparator circuit is after described polarity conversion, according to the voltage of described the second data line and the first voltage comparative result of the described second positive driving voltage, described positive polarity common voltage is passed to described first node, and described the second data line is charged; The second electric charge storage unit is electrically connected to the second end of the second sub-switch in described second switch group, and described the second electric charge storage unit obtains the negative polarity common voltage by the conducting of described second switch group; And second comparator circuit, be electrically connected to described Section Point, second voltage driver element and the second electric charge storage unit respectively, described the second comparator circuit is after described polarity conversion, according to the voltage of described the first data line and the second voltage comparative result of described the second negative driving voltage, described negative polarity common voltage is passed to described Section Point, and described the first data line is discharged.

further aspect of the present invention provides a kind of charge share control method, be applied to display panel control device, described control device comprises the first data line, the second data line, the first voltage drive unit, the second voltage driver element, the first electric charge storage unit, the second electric charge storage unit, the first switches set, the second switch group, the 3rd switches set, the 4th switches set, and first amplifier, the second amplifier, wherein said the first voltage drive unit and described second voltage driver element provided respectively the first positive driving voltage and the first negative driving voltage before the polarity conversion, provide respectively the second positive driving voltage and the second negative driving voltage after described polarity conversion, described control method comprises following steps: (A) described the first switches set of conducting, so that described the first voltage drive unit provides the described first positive driving voltage to described the first data line, and make described second voltage driver element provide the described first negative driving voltage to described the second data line, (B) the described second switch group of conducting, transmit positive charge so that have the first data line of the described first positive driving voltage to described the first electric charge storage unit, and then make described the first electric charge storage unit have the positive polarity common voltage, and make the second data line with described first negative driving voltage transmit negative charge to described the second electric charge storage unit, and then make described the second electric charge storage unit have the negative polarity common voltage, (C) described the 3rd switches set of conducting is so that described the first data line and described the second data line are connected to ground voltage, and (D) after described polarity conversion, the first comparison switch and second that described the 4th switches set of conducting comprises is switch relatively, described the first amplifier is driven by voltage and the described second positive driving voltage of described the second data line, and described the second data line is charged, and described the second amplifier is driven by voltage and the described second negative driving voltage of described the first data line, and described the first data line is discharged.

Another aspect of the invention provides a kind of charge share control device, be applied to display panel, described control device comprises: at least 1 switches set, comprise the first switches set, second switch group and the 3rd switches set, it all comprises the first sub-switch and the second sub-switch, and the first sub-switch of described the first switches set, two switches set, the 3rd switches set all is electrically connected on first node, and the described second sub-switch all is electrically connected on Section Point; The first data line is electrically connected on described display panel, and is electrically connected to described first node before the polarity conversion, is electrically connected to described Section Point after described polarity conversion, when described the 3rd switches set conducting, has ground voltage; The second data line is electrically connected on described display panel, and is electrically connected to described Section Point before described polarity conversion, is electrically connected to described first node after described polarity conversion, when described the 3rd switches set conducting, has described ground voltage; The first voltage drive unit, be electrically connected to the first sub-switch of described the first switches set, described the first voltage drive unit provided first positive driving voltage to described the first data line by described first node before described polarity conversion, and provided the second positive driving voltage to described the second data line after described polarity conversion; The second voltage driver element, be electrically connected to the second sub-switch of described the first switches set, described second voltage driver element provided first negative driving voltage to described the second data line by described Section Point before described polarity conversion, and provided the second negative driving voltage to described the first data line after described polarity conversion; The first electric charge storage unit, be electrically connected to the first sub-switch of described second switch group, described the first electric charge storage unit obtains by described first node the positive charge that described the first data line transmits, and then has the positive polarity common voltage when described second switch group conducting; The second electric charge storage unit, be electrically connected to the second sub-switch of described second switch group, described the second electric charge storage unit obtains by described Section Point the negative charge that described the second data line transmits, and then has the negative polarity common voltage when described second switch group conducting; The 4th switches set comprises first and compares relatively switch of switch and second; The first amplifier, comparing switch with described first node and first respectively is electrically connected to, when described first compares switch conduction, described the first amplifier is electrically connected to described the first electric charge storage unit, voltage and the described second positive driving voltage by described the second data line drive, and described the second data line is charged; And second amplifier, comparing switch with described Section Point and second respectively is electrically connected to, when described second compares switch conduction, described the second amplifier is electrically connected to described the second electric charge storage unit, voltage and the described second negative driving voltage by described the first data line drive, and described the first data line is discharged.

the present invention also provides a kind of charge share control method on the one hand, be applied to the control device of display panel, described control device comprises the first data line, the second data line, the first voltage drive unit, the second voltage driver element, the first electric charge storage unit, the second electric charge storage unit, the first switches set, the second switch group, the 3rd switches set, the first transistor to and transistor seconds pair, wherein, described the first voltage drive unit and described second voltage driver element provide respectively the first positive driving voltage and the first negative driving voltage in first period, and provide respectively the second positive driving voltage and the second negative driving voltage in the second phase, described control method comprises following steps: (A) described the first switches set of conducting, so that described the first voltage drive unit provides the described first positive driving voltage to described the first data line, and make described second voltage driver element provide the described first negative driving voltage to described the second data line, (B) the described second switch group of conducting, transmit positive charge so that have the first data line of the described first positive driving voltage to described the first electric charge storage unit, make described the first electric charge storage unit have the positive polarity common voltage, and make the second data line with described first negative driving voltage transmit negative charge to described the second electric charge storage unit, make described the second electric charge storage unit have the negative polarity common voltage, and (C) described the 3rd switches set of conducting, when the described second positive driving voltage during lower than the voltage of described the first data line, by the right conducting of described the first transistor and then to described the first data line discharge, and when the described second negative driving voltage during higher than the voltage of described the second data line, by the right conducting of described transistor seconds and then to described the second data line charging.

The present invention provides a kind of charge share control device on the other hand, is applied to display panel, and described control device comprises: the first data line is electrically connected to described display panel; The second data line is electrically connected to described display panel; The first voltage drive unit provides the first positive driving voltage in first period to described the first data line, provides the second positive driving voltage in the second phase to described the first data line; The second voltage driver element provides the first negative driving voltage in described first period to described the second data line, provides the second negative driving voltage in the described second phase to described the second data line; At least 1 switches set, comprise the first switches set, second switch group and the 3rd switches set, it all comprises the first sub-switch and the second sub-switch, wherein said the first switches set is electrically connected between each described data line and each described voltage drive unit, and makes described the first data line have the described first positive driving voltage and described the second data line has the described second negative driving voltage in described first period in described first period; The first electric charge storage unit by described second switch group and described the first data line conducting, and then obtains the positive polarity common voltage; The second electric charge storage unit by described second switch group and described the second data line conducting, and then obtains the negative polarity common voltage; The first transistor pair is electrically connected on ground voltage, described the first voltage drive unit and described the first data line, and when described the 3rd switches set conducting, described the first transistor is to being electrically connected on described the first electric charge storage unit; And transistor seconds pair, be electrically connected on ground voltage, described second voltage driver element and described the second data line, when described the 3rd switches set conducting, described transistor seconds is to being electrically connected on described the second electric charge storage unit; When described the 3rd switches set conducting, if the described second positive driving voltage is lower than the voltage of described the first data line, by described the first transistor to described the first data line is discharged, if and the described second negative driving voltage is higher than the voltage of described the second data line, by described transistor seconds to described the second data line is charged.

The invention described above can reach fast data line is carried out charge and discharge for control method and device that panel application provides, and the effect that reduces power consumption.According to control device proposed by the invention and method, use by transistor, amplifier and switches set, allow data line can by voltage drive unit the actual driving voltage that provides, and selectivity is carried out respectively charging and discharging to data line, also allows the power consumption of control device be minimized.According to control device proposed by the invention and method, by paired transistor, the use of switches set, allow display panel can be fast because of the change of driving voltage, and accelerate corresponding charging, the velocity of discharge.

Description of drawings

Figure 1A, Figure 1B and Fig. 1 C are that prior art shows the electrical block diagram of control to display panel;

Fig. 1 D is in three phases corresponding to Figure 1A, Figure 1B and Fig. 1 C, the change in voltage schematic diagram of the first data line;

Fig. 1 E is in three phases corresponding to Figure 1A, Figure 1B and Fig. 1 C, the variation schematic diagram of the voltage of the second data line;

Fig. 2 A provides the schematic diagram of positive and negative driving voltage for to carry out in the charge share process with four switches set and two electric charge storage units to each data line in the phase one;

Fig. 2 B carries out the schematic diagram of charge storage for to carry out in the charge share process with four switches set and two electric charge storage units in subordinate phase;

Fig. 2 C is for to carry out in the charge share process with four switches set and two electric charge storage units, the schematic diagram that each data line is connected with ground voltage in the phase III;

Fig. 2 D after the polarity conversion, carries out the schematic diagram of charge share for to carry out in the charge share process with four switches set and two electric charge storage units in the quadravalence section;

Fig. 2 E carries out the schematic diagram of polarity conversion for to carry out in the charge share process with four switches set and two electric charge storage units at five-stage;

Fig. 2 F and Fig. 2 G be for take the first data line, the second data line as example, shown in the data line of the opposed polarity schematic diagram that voltage changed because of the different phase of charge share;

Fig. 3 A is that in the present invention, the voltage according to data line judges, utilizes voltage drive unit the first data line directly to be provided the schematic diagram of driving voltage;

Fig. 3 B is that in the present invention, the voltage according to data line judges, utilizes voltage drive unit the second data line directly to be provided the schematic diagram of driving voltage;

Fig. 3 C adopts charge sharing method, the schematic diagram before the polarity conversion with nmos pass transistor, PMOS transistor collocation electric charge storage unit;

Fig. 3 D adopts charge sharing method, the schematic diagram after the polarity conversion with nmos pass transistor, PMOS transistor collocation electric charge storage unit;

Fig. 4 is for adopting the schematic diagram of mode after carrying out the polarity conversion of control circuit collocation amplifier;

Fig. 5 A is for providing the schematic diagram of two groups of positive and negative electric charge storage units in control device;

Fig. 5 B is when adopting two groups of positive and negative electric charge storage units shown in Fig. 5 A, the voltage schematic diagram that electric charge storage unit provides;

When Fig. 6 organizes positive and negative electric charge storage unit for use n, the voltage schematic diagram that electric charge storage unit provides;

Fig. 7 is for further providing charge share and the schematic diagram that accelerates the charge and discharge method in the present invention.

In accompanying drawing, the component names of each label representative is as follows:

101, the first data line, 102, the second data line, 103, the 3rd data line, 104, the 4th data line, 111, the first voltage drive unit, 112, the second voltage driver element, 113, the tertiary voltage driver element, 114, the 4th voltage drive unit, 201, the first data line, 202, the second data line, 203, the 3rd data line, 204, the 4th data line, 211, the first voltage drive unit, 212, the second voltage driver element, 213, the tertiary voltage driver element, 214, the 4th voltage drive unit, 301, the first data line, 302, the second data line, 311, the first voltage drive unit, 312, the second voltage driver element,

401, the first data line, the 402, second data line, the 411, first voltage drive unit, 412, second voltage driver element, the 421, first amplifier, the 422, second amplifier, 501, the first data line, 502, the second data line, the 511, first voltage drive unit, 512, the second voltage driver element, 701, the first data line, 702, the second data line, the 711, first voltage drive unit, 712, the second voltage driver element

Embodiment

For making purpose of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.

Consume too much power in the process of polarity conversion for fear of data line, the control circuit that the collocation flat-panel screens is used can provide the function of charge share (charge sharing) usually.

Below in conjunction with a kind of charge sharing method of Fig. 2 A to Fig. 2 E explanation, for convenience of explanation, below the configuration mode of data line, voltage drive unit of each accompanying drawing all similar to each accompanying drawing of Figure 1A to Fig. 1 E.

That is, the accompanying drawing left side from top to bottom is followed successively by: the first voltage drive unit 211, second voltage driver element 212, tertiary voltage driver element 213, the 4th voltage drive unit 214.The accompanying drawing right side from top to bottom is followed successively by: the first data line 201, the second data line 202, the 3rd data line 203, the 4th data line 204.Wherein, the connected mode between each voltage drive unit and data line can change along with the different of the stage of control.

Moreover, what need be careful is, the first period that herein will carry out before polarity conversion is divided into three phases (phase one I, subordinate phase II, phase III III), and the second phase after the polarity conversion is divided into two stages (quadravalence section VI, five-stage V).

Fig. 2 A to Fig. 2 E and Figure 1A to Fig. 1 C are compared and can find out, the switches set number that Fig. 2 A to Fig. 2 E uses is more.Connect the switches set of voltage drive unit and ground voltage except originally being used for, for each data line, all additionally used two switches, be connected to respectively two electric capacity.These two groups newly-increased switches set are electrically connected on the first electric charge storage unit (the first electric capacity) Cp respectively the data line of positive driving voltage, the second electric charge storage unit (the second electric capacity) Cn are electrically connected on the data line of bearing driving voltage when conducting (turn on).

For ease of explanation, in Fig. 2 A to Fig. 2 E, each switches set all indicates with numbering, and the purposes of each switches set is defined as follows described:

The first switches set (1) is in the phase one of control procedure I and five-stage conducting, and it is used for each voltage drive unit of conducting and corresponding data line.

Second switch group (2) is in the subordinate phase II of control procedure conducting, and it is passed to the first electric charge storage unit Cp with positive charge and makes the voltage of the first electric charge storage unit Cp be positive polarity common voltage Vp-com; And negative charge is passed to the second electric charge storage unit Cn, make the voltage of the second electric charge storage unit Cn be negative polarity common voltage Vn-com.In other words, second switch group (2) will have data line (for example odd data line) conducting of positive charge (positive driving voltage), and positive charge is stored in the first electric charge storage unit Cp, and data line (for example even data line) conducting that will have negative charge (negative driving voltage), and negative charge is stored in the second electric charge storage unit Cn.

The 3rd switches set (3) is when phase III III, and the electric charge conducting that distributes on each data line is carried out charge share to ground voltage.

Moreover, the 4th switches set (4) is in the 4th Phase IV conducting of control procedure, purpose is with before in subordinate phase II, obtains the first electric charge storage unit Cp and the conducting of even data line of positive polarity common voltage Vp-com, and positive charge is redistributed on the even data line; And will obtain the second electric charge storage unit Cn and the conducting of odd data line of negative polarity common voltage Vn-com before in subordinate phase II, negative charge is redistributed on the odd data line.

At last, the first switches set (1) is once again in five-stage V conducting, although this moment, voltage drive unit was different with phase one I from the connected mode that the data line combination forms, purpose is the needed driving voltage of each data line when being provided at picture disply by voltage drive unit equally.

It should be noted that, for identical voltage drive unit, namely the polarity of the driving voltage that provides of toilet is kept unanimously, but before carrying out the polarity conversion, first period afterwards, the driving voltage that the second phase provides may change.

Take the first voltage drive unit 211 as example, during in phase one I conducting, will provide the first positive driving voltage when the first switches set (1); During in five-stage V conducting, provide the second positive driving voltage when the first switches set (1).Same, during in phase one I conducting, second voltage driver element 212 will provide the first negative driving voltage when second switch group (2); During in five-stage V conducting, 212 of second voltage driver elements provide the second negative driving voltage when second switch group (2).

Concerning the odd data line, because the second electric charge storage unit Cn provides negative charge in the 4th Phase IV, when five-stage V, the voltage of odd data line is not to begin to reduce by 0 volt, but is reduced to through the negative voltage (negative polarity common voltage Vn-com) of overbias the current potential that the driving voltage that provides with negative voltage driving unit (as: second voltage driver element 212, the 4th voltage drive unit 214) equates in advance by one.

The dual numbers data line, because the first electric charge storage unit Cp provides positive charge at quadravalence section VI, when five-stage, the voltage of even data line is not to begin to increase by 0 volt, but by one in advance through the positive voltage (positive polarity common voltage Vp-com) of overbias, the current potential that the driving voltage that increasing to provides with positive voltage driver element (as: the first voltage drive unit 211, tertiary voltage driver element 213) equates.

Below more further with Fig. 2 F, Fig. 2 G auxiliary view 2A to Fig. 2 E, how because of the different phase of control procedure, and the schematic diagram that voltage changes is described to the first data line 201, the second data line 202.Because the 3rd data line 203 is similar to the operation of the first data line 201, the 4th data line 204 is similar to the operation of the second data line 202, only represents the change in voltage of the first data line 201 herein with Fig. 2 F, represents the change in voltage of the second data line 202 with Fig. 2 G.

Fig. 2 A provides the schematic diagram of positive and negative driving voltage to each data line for to carry out in the control procedure of display panel in the charge share mode in the phase one.Phase one I in control procedure, individual other data line is electrically connected to the voltage drive unit that positive and negative driving voltage is provided by the first switches set (1) respectively, and makes each data line maintain fixing voltage.

That is, the first data line 201 is electrically connected to the first voltage drive unit 211, and makes the voltage of the first data line 201 maintain the first positive driving voltage (as: 5 volts); And the second data line 202 is electrically connected to second voltage driver element 212, and makes the voltage of the second data line 202 maintain the first negative driving voltage (as: 5 volts).In like manner, tertiary voltage driver element 213 makes the 3rd data line 203 maintain another positive driving voltage, and the 4th voltage drive unit 214 makes the 4th data line 204 maintain another negative driving voltage.Can be found out by Fig. 2 F, Fig. 2 G, when phase one I, the voltage of the first data line 201 is approximately+and 5 volts, the voltage of the second data line 202 is approximately-5 volts.

Fig. 2 B carries out the schematic diagram of charge storage for to carry out in the control procedure of display panel in the charge share mode in subordinate phase.In this stage, the first data line 201 is electrically connected to the first electric charge storage unit Cp that stores positive charge by the conducting of second switch group (2), and makes its voltage maintain a positive polarity common voltage Vp-com.Also can find out from Fig. 2 F, the voltage of the first data line 201 is roughly 2.5 volts at subordinate phase II.

On the other hand, the second 202 of data lines are electrically connected to the second electric charge storage unit Cn that stores negative charge by the conducting of second switch group (2), and make its voltage maintain a negative polarity common voltage Vn-com.Also can find out from Fig. 2 G, the voltage of the second data line 202 is roughly-2.5 volts at subordinate phase II.

Fig. 2 C is for to carry out in the control procedure of display panel in the charge share mode, in the phase III, each data line is connected in ground voltage and carries out the schematic diagram of charge share.Can be found out by Fig. 2 F, Fig. 2 G, when phase III III, the voltage of the first data line 201 and the second data line 202 all roughly maintains 0 volt because of the relation of ground connection.

Fig. 2 D after the polarity conversion, carries out in the quadravalence section schematic diagram that electric charge is redistributed for to carry out in the control procedure of display panel in the charge share mode.By the 4th switches set (4), with each odd data line and the second electric charge storage unit Cn conducting that stores negative charge, and with each even data line and the first electric charge storage unit Cp conducting that stores positive charge.

Coordinate Fig. 2 F to find out, the first data line 201 is in the 4th Phase IV process, because the negative charge that is provided by the second electric charge storage unit Cn has been provided, its voltage drops to approximately-2.5 volts (namely by 0 volt, negative polarity common voltage Vn-com), be equivalent to the second electric charge storage unit Cn, the first data line 201 be discharged.

According to Fig. 2 G, the second data line 202 is in the 4th Phase IV process, because the positive charge that is provided by the first electric charge storage unit Cp has been provided, its voltage by 0 volt (namely, ground voltage) rise to approximately+2.5 (namely, positive polarity common voltage Vp-com) volt, be equivalent to the first electric charge storage unit Cp, the second data line 202 be charged.

As shown in Fig. 2 E, for carrying out in the charge share mode in the control procedure of display panel, carry out the schematic diagram of polarity conversion at five-stage.Take a display panel of counter-rotating (dot inversion) as example, when upgrading the driving voltage of next column pixel, the operation of meeting polarization conversion, at this moment, the connected mode between each data line and each voltage drive unit will by first period in twos sequentially paired mode change in staggered in twos mode and be connected.

For example: when phase one I, the first data line 201 and the second data line 202 are electrically connected on respectively the first voltage drive unit 211 and second voltage driver element 212 by the conducting of the first switches set (1).But when five-stage V, the first data line 201 be connected the voltage drive unit that data line 202 connects and but be respectively second voltage driver element 212 and the first voltage drive unit 211.In like manner, the 3rd data line 203, the 4th data line 204 also change because of the polarity conversion with the connected mode of tertiary voltage driver element 213, the 4th voltage drive unit 214.

Therefore, can be found out by Fig. 2 F, the first data line 201 is electrically connected to second voltage driver element 212 by the conducting of the first switches set (1), the voltage of the first data line 201 of this moment will be changed to the second negative driving voltage (5 volts) by negative polarity common voltage Vn-com (2.5 volts); Also can be seen by Fig. 2 G, concerning the second data line 202, by the conducting of the first switches set (1), being electrically connected to the first voltage drive unit 211, so voltage will be changed to the second positive driving voltage (+5 volts) by positive polarity common voltage Vp-com (+2.5 volts).

That is, as shown in Fig. 2 A to Fig. 2 G, positive charge and negative charge subordinate phase II will may run off originally first are stored in electric charge storage unit, reuse when the 4th Phase IV afterwards.Namely by the mode of charge share, allow each data line when five-stage V, the amplitude of variation of voltage becomes less.In simple terms, this kind structure provides with electric capacity for each data line and has stored electric charge, allows electric charge in the polarity transfer process, and the mode that is able to recycling reduces the power consumption of panel.

Although the method that Fig. 2 A to Fig. 2 G adopts allows the consumption of electric energy reduce, but this kind method still has its shortcoming, namely after reversal of poles occurs, the second positive driving voltage might not be higher than positive polarity common voltage Vp-com, and the second negative driving voltage might not be lower than negative polarity common voltage Vn-com.That is, the change amplitude that is not the driving voltage that provided by voltage drive unit each time is all the range changing with+5 volts ,-5 volts, in case during for more by a small margin change in voltage, the method for Fig. 2 may produce and overcharge, the phenomenon of over-discharge can.

For instance, when five-stage V, the second negative driving voltage that is provided by second voltage driver element 212 may be-0.2 volt.If the second electric charge storage unit Cn is-2.5 volts at the negative polarity common voltage Vn-com that quadravalence section VI stores, this moment, the first data line 201 needed to charge on the contrary, made the first data line 201 be promoted to the second negative driving voltage (0.2 volt) by negative polarity common voltage Vn-com (2.5) volt.

That is to say, the second negative driving voltage might not be lower than negative polarity common voltage Vn-com, negative polarity common voltage Vn-com in the 4th Phase IV, may cause five-stage V to charge to the first data line 201, yet these discharge, charging processes have repeatedly just additionally consumed time and electric energy.

Same, when five-stage V, the second positive driving voltage that is provided by the first voltage drive unit 211 may be+0.2 volt.If the first electric charge storage unit Cp is during quadravalence section VI, the positive polarity common voltage Vp-com of storage is+2.5 volts, and this moment, the second data line 202 needed to discharge on the contrary, makes the voltage drop of the second data line 202 to+0.2 volt.

That is to say, the second positive driving voltage might not be higher than positive polarity common voltage Vp-com, positive polarity common voltage Vp-com at quadravalence section VI, may cause the second data line 202 must discharge at five-stage V, and these charging, discharge processes have repeatedly just additionally consumed time and electric energy.

The part shown in the dotted line circle in Fig. 2 F, Fig. 2 G, the change in voltage when expression the first data line 201 and the second data line 202 are converted to five-stage V by the 4th Phase IV.

Produce over-discharge can, the second data line 202 for fear of the first data line 201 at quadravalence section VI and produce the phenomenon that overcharges in the 4th Phase IV, the present invention proposed before data line carries out the charging, discharge of the 4th Phase IV, can be because of the voltage when the five-stage V, and then judge whether to utilize electric charge storage unit to charge in advance, discharge.

That is the driving voltage that, whether will utilize the first electric charge storage unit Cp and the second electric charge storage unit Cn to charge, discharge must to provide according to voltage drive unit and the voltage of data line determine.When driving voltage not yet can make comparator circuit have an effect, when namely the second positive driving voltage or the second negative driving voltage are relatively near ground voltage, just do not charge, discharge with electric charge storage unit.

As shown in Figure 3A, for the voltage according to data in the present invention judges, and selection is discharged the first data line with the second negative driving voltage that voltage drive unit was provided schematic diagram.In Fig. 3 A, what present that the dotted line of stepped decline represents is the change in voltage of the perfect condition of charge sharing method.

According to above stated specification as can be known, when charge share finishes in the 4th Phase IV, and when entering five-stage V, referring to Fig. 3 C, Fig. 3 D, if offered the second negative driving voltage (as: 0.6 volt) of the first data line by second voltage driver element 312, its absolute value is during less than negative polarity common voltage Vn-com, the voltage of the first data line 301 will be as shown in line segment L1 at five-stage V, must re-use voltage drive unit, the voltage of the first data line 301 is charged to-0.6 volt by-2.5 volts.

First discharge, need again afterwards the problem of charging in order to improve this kind, the scheme that the present invention proposes is:

When the 4th Phase IV, directly utilize voltage drive unit that the voltage of the first data line 301 directly is discharged to required driving voltage, for example: directly be discharged to-0.6 volt by 0 volt.That is, as the line segment L1 ' of Fig. 3 A.

That is, during relatively near ground voltage, the negative charge that is provided by the second electric charge storage unit Cn just is not provided the first data line 301, and maintains 0 volt when the second negative driving voltage.That is to say, the voltage of the first data line 301 can't first become negative polarity common voltage Vn-com by ground voltage (0 volt), and directly drops to the second negative driving voltage by 0 volt.Thus, just can improve the power dissipation that the first data line 301 repeated charge cause.

As shown in Fig. 3 B, for the voltage according to data line in the present invention judges, and the schematic diagram that selection is provided the second data line with the first voltage drive unit the second positive driving voltage charges.In Fig. 3 B, what present that the dotted line of stepped rising represents is the change in voltage of the perfect condition of charge sharing method.

according to above stated specification as can be known, when charge share finishes in the 4th Phase IV, and when entering five-stage V, if second its absolute value of positive driving voltage (as: 0.6 volt) that offers the second data line 302 by the first voltage drive unit 311 is during less than positive polarity common voltage Vp-com, the voltage of the second data line 302 will be as shown in line segment L2 at five-stage V, must re-use voltage drive unit, the voltage of the second data line 302 is discharged to 0.6 volt by 2.5 volts, so will produce first and charge, needed again afterwards the phenomenon of discharging, the solution of the present invention is:

The present invention is directly charged to the magnitude of voltage of the second positive driving voltage with the voltage of the second data line 302, for example: directly charge to 0.6 volt by 0 volt by ground voltage (0 volt) when the 4th Phase IV.That is, as the line segment L2 ' in Fig. 3 B.

That is, during near ground voltage, the positive charge that is provided by the first electric charge storage unit Cp just is not provided the second data line 302, and maintains 0 volt when the second positive driving voltage.That is to say, the voltage of the second data line 302 can't first become positive polarity common voltage Vp-com by ground voltage (0 volt), and directly rises to the second positive driving voltage by 0 volt.Thus, just can improve the power dissipation that the second data line 302 repeated charge cause.

Therefore, the following preferred embodiment of lifting of the present invention can be because of the size of driving voltage, and optionally utilizes electric charge storage unit to provide data line to discharge, charge, or does not carry out any operation.

In this preferred embodiment, enumerate a kind of control device example that is applied to display panel, this control device is except comprising: many data lines, a plurality of voltage drive unit, a plurality of electric charge storage unit, and outside a plurality of switches set, also comprised a plurality of nmos pass transistors and a plurality of PMOS transistor.

The operational scenario of two data lines in control device only is shown for the purpose of simplifying the description.The first data line 301, the second data line 302 in many data lines only are discussed, namely, the first voltage drive unit 311 in a plurality of voltage drive units, the control mode between second voltage driver element 312, in a plurality of switches set to aforementioned data line, switch that voltage drive unit is relevant, and the nmos pass transistor, the PMOS transistor that are connected with the first data line 301, the second data line 302, the control mode between remaining data line and voltage drive unit is quite similar.Moreover the number of the actual electric charge storage unit that provides of control device does not need to limit, and can adjust according to the needs of using.

For the method that the position standard selectivity that a driving voltage that can provide because of voltage drive unit is provided is charged, discharged, Fig. 3 C, Fig. 3 D graphic is a collocation nmos pass transistor, PMOS transistor and the preferred embodiment used with the electric charge storage unit collocation.

Each switches set in figure can be controlled by the pulse control signal that impulse controller sends, first period before the polarity conversion occurs comprises phase one I to phase III III, and the second phase after the polarity conversion occurs comprises quadravalence section VI and five-stage V.Wherein the first switches set (1) is under the control of pulse control signal, respectively in phase one I and five-stage V conducting; Second switch group (2), the 3rd switches set (3) and the 4th switches set (4) are under the control of pulse control signal, respectively in subordinate phase II, phase III III, the 4th Phase IV conducting.

The first switches set (1) is arranged between voltage drive unit and data line, second switch group (2) is arranged between electric charge storage unit and data line, the 3rd switches set (3) is arranged between data line and ground voltage.For convenience of explanation, the first sub-switch, the second sub-switch that comprise of each switches set divided according to the columns in figure.

The first sub-switch (2-1) that the first sub-switch (1-1), the second switch group (2) that the first switches set (1) comprises comprises, and the first sub-switch (3-1) that the 3rd switches set (3) comprises all is electrically connected on first node S1; The second sub-switch (2-2) that the second sub-switch (1-2), the second switch group that the first switches set comprises comprises, and the second sub-switch (3-2) that the 3rd switches set comprises all is electrically connected on Section Point S2.

In simple terms, the first sub-switch (1-1) of the first switches set (1) and the second sub-switch (1-2) are when phase one I conducting, the first voltage drive unit 311 will provide the first positive driving voltage to the first data line 301 by first node S1, and second voltage driver element 312 will provide the first negative driving voltage to the second data line 302 by Section Point S2.

When second switch group (2) during in subordinate phase II conducting, the first data line 301 with first positive driving voltage will be sent to the first electric charge storage unit Cp with the positive charge on it by the first sub-switch (2-1) in second switch group (2), and the second data line 302 with first negative driving voltage will be sent to the second electric charge storage unit Cn with the negative charge on it by the second sub-switch (2-2) in second switch group (2), make and store positive polarity common voltage Vp-com and negative polarity common voltage Vn-com on electric capacity.

When the first sub-switch (3-1) of the 3rd switches set (3) with the second sub-switch (3-2) during in phase III III conducting, the first data line 301 and the second data line 302 conductings are to ground voltage, and make the voltage of the first data line 301 and the second data line 302 be 0 volt at phase III III.

Due to voltage drive unit, ground voltage, electric charge storage unit and the first switches set (1), second switch group (2), the conduction mode of the 3rd switches set (3) before the polarity conversion, and the change in voltage that corresponds to data line is similar to Fig. 2 A to Fig. 2 C, no longer repeat to illustrate each switches set herein in the conducting situation of first period, only with Fig. 3 C, Fig. 3 D represent respectively through before the polarity conversion, the schematic diagram of afterwards control device inside.

As shown in Figure 3 C, be the charge sharing method of arranging in pairs or groups with nmos pass transistor, PMOS transistor collocation electric charge storage unit, the schematic diagram before the polarity conversion.The present invention provides the first comparator circuit and the second comparator circuit in addition after carrying out the polarity conversion, wherein the first comparator circuit has comprised first and compared switch (4-1) and nmos pass transistor N1; The second comparator circuit has comprised second and has compared switch (4-2) and PMOS transistor P1.

The effect of these two comparator circuits is, determine whether utilizing the positive polarity common voltage that the second data line 302 is charged according to the first comparator circuit, and determine whether utilizing the negative polarity common voltage that the first data line 301 is discharged according to the second comparator circuit.

First compares switch (4-1) compares switch (4-2) with second, conducting after the polarity conversion, wherein the first comparison switch (4-1) is electrically connected between the first electric charge storage unit Cp and nmos pass transistor, and second compares switch (4-2) is electrically connected between the second electric charge storage unit Cn and PMOS transistor.

At first, the grid of nmos pass transistor N1 is electrically connected on the first voltage drive unit 311, drain electrode and is electrically connected on first relatively switch (4-1), source electrode are electrically connected on the first data line 301 or the second data line 302 by first node S1, wherein, before the polarity conversion, first node S1 is electrically connected on the first data line 301, after the polarity conversion, first node S1 is electrically connected on the second data line 302.

In addition, the grid of PMOS transistor P1 is electrically connected on second voltage driver element 312, drain electrode and is electrically connected on second relatively switch (4-2), source electrode are electrically connected on the first data line 301 or the second data line 302 by Section Point S2, wherein, before the polarity conversion, Section Point S2 is electrically connected on the second data line 302, after the polarity conversion, Section Point S2 is electrically connected on the first data line 301.

As shown in Fig. 3 D, for arranging in pairs or groups electric charge storage unit in conjunction with charge sharing method with nmos pass transistor, PMOS transistor, the schematic diagram after the polarity conversion.In first relatively relatively all conductings (that is, when being in the 4th Phase IV) of switch (4-2) of switch (4-1) and second, further illustrate the transistorized turn-on condition of nmos pass transistor and PMOS as described below.

Pair nmos transistor N1, its grid are electrically connected on the first voltage drive unit 311; When first compared switch (4-1) conducting, the drain electrode of nmos pass transistor N1 was electrically connected on the first electric charge storage unit Cp; And the source electrode of nmos pass transistor N1 before polarity conversion, afterwards, be electrically connected on respectively the first data line 301, the second data line 302 by first node S1.

Due to the conducting of nmos pass transistor N1 whether, depend on the voltage pressure reduction between its grid, source electrode, namely the second positive driving voltage of providing of the first voltage drive unit 311, and the voltage difference between the second data line 302.

If the difference of the voltage of the second positive driving voltage and the second data line 302 is during higher than the first voltage threshold, nmos pass transistor N1 will be therefore and conducting.At this moment, just first by the first electric charge storage unit Cp, the second data line 302 is charged, after making the voltage of the second data line 302 rise to positive polarity common voltage Vp-com by 0 volt, further utilize again the first voltage drive unit 311, the second data line 302 is charged to the second positive driving voltage by positive polarity common voltage Vp-com.

On the other hand, during not higher than the first voltage threshold, nmos pass transistor N1 can't conducting when the difference of the voltage of the second positive driving voltage and the second data line 302.Also therefore, the first electric charge storage unit Cp can't charge to the second data line 302, but the second positive driving voltage that utilizes the first voltage drive unit 311 to provide directly charges to the second data line 302.

In order more to clearly demonstrate the method for operating of this accompanying drawing, below further come for example with the voltage value of reality.Suppose when positive polarity common voltage Vp-com and negative polarity common voltage Vn-com be respectively+2.5 volts ,-2.5 volts the time, the second positive driving voltage be discussed respectively be 4.5 volts with 0.5 volt of two kinds of situation.

At first discuss when the second positive driving voltage is the first situation of+4.5 volts, namely the second positive driving voltage is under the prerequisite of+4.5 volts, the grid of the nmos pass transistor N1 that is electrically connected to the first voltage drive unit 311, its voltage is also+4.5 volts, because be electrically connected on the relation of the second data line 302, its voltage is+0 volt to the source voltage of nmos pass transistor N1.

Due to the grid of nmos pass transistor N1, voltage pressure reduction Vgs between source electrode greater than critical voltage (4.5 volts-0 volt=4.5 volts), therefore nmos pass transistor N1 is with conducting, make the second data line 302 that is connected with the source electrode of nmos pass transistor N1, risen to+2.5 volts (positive polarity common voltage Vp-com) by at the beginning 0 volt, when the first switches set (1) conducting, the second data line 302 will be by the charging of the first voltage drive unit 311, more further by+2.5 volts rise to+4.5 volts.

Then discuss when the second positive driving voltage is the second case of+0.5 volt, that is, when the second positive driving voltage was+0.5 volt, the grid voltage of nmos pass transistor N1 was also+0.5 volt, the source voltage of nmos pass transistor N1 equates with the second data line 302 voltages, and its voltage is 0 volt.

Due to the grid of nmos pass transistor N1, pressure reduction Vgs between source electrode less than critical voltage (0.5 volt-0 volt=0.5 volt), therefore nmos pass transistor N1 can't make the first electric charge storage unit Cp and the second data line 302 conductings, so positive polarity common voltage Vp-com can't affect the voltage of the second data line 302.When the voltage of the second data line 302 must be waited until the first switches set (1) conducting, just directly the second data line 302 is charged to the second positive driving voltage (+0.5 volt) by the first voltage drive unit 311.

Same, for the conduction mode of PMOS transistor P1, also can analogize aforesaid explanation and draw, repeat no more herein.

The operation of Fig. 3 C after the polarity conversion can be summarized as follows, and when first compared switch (4-1) conducting, the voltage of the first electric charge storage unit Cp can compare the drain electrode that switch (4-1) is sent to nmos pass transistor N1 by first.At this moment, if the first relatively switch (4-1) conducting, and when meeting the first voltage comparative result, will make nmos pass transistor N1 conducting, and utilize the positive polarity common voltage Vp-com that is passed to first node S1 that the second data line 302 is charged.

When second compared switch (4-2) conducting, the voltage of the second electric charge storage unit Cn can compare the drain electrode that switch (4-2) is sent to PMOS transistor P1 by second.At this moment, if the second relatively switch (4-2) conducting, and when meeting the second voltage comparative result, will make PMOS transistor P1 conducting, and utilize the negative polarity common voltage Vn-com that is passed to Section Point S2 that the first data line 301 is discharged.

When nmos pass transistor N1 conducting, be equivalent to the second positive driving voltage higher than the voltage of the second data line 302, and both voltage differences are greater than making the required critical voltage of nmos pass transistor N1 conducting, i.e. the first voltage threshold.Just first utilize positive polarity common voltage Vp-com to carry out the charging of first to the second data line 302 this moment, recycle afterwards 311 pairs of the second data lines 302 of the first voltage drive unit and carry out the charging of second portion, make its voltage further rise to the second positive driving voltage by positive polarity common voltage Vp-com.Otherwise when if nmos pass transistor N1 is not switched on, the second data line 302 that directly utilizes the first voltage drive unit 311 will have ground voltage charges to the second positive driving voltage.

When PMOS transistor P1 conducting, be equivalent to the second negative driving voltage lower than the voltage of the first data line 301, and both voltage differences are less than making the required critical voltage of PMOS transistor P1 conducting, that is, and the second voltage threshold value.Just carry out the discharge of first by negative polarity common voltage Vn-com to the first data line 301 this moment, recycle afterwards 312 pairs of the first data lines 301 of second voltage driver element and carry out the discharge of second portion, make its voltage further drop to the second negative driving voltage by negative polarity common voltage Vn-com.Otherwise when if PMOS transistor P1 is not switched on, the first data line 301 that directly utilizes second voltage driver element 312 will have ground voltage charges to the second negative driving voltage.

Fig. 3 C can be found out when the method for technology is compared before, and the second data line 302 might not after the polarity conversion, directly utilize the first electric charge storage unit Cp to charge.Only when the voltage of the second data line 302 and the second positive driving voltage meet the first voltage comparative result, positive polarity common voltage Vp-com just can be passed to by the conducting of nmos pass transistor N1 first node S1, and then utilizes positive polarity common voltage Vp-com that the second data line 302 is charged.

The first voltage comparative result herein refers to, higher than the first voltage threshold, namely make the grid of nmos pass transistor N1, the voltage pressure reduction between source electrode greater than making the required critical voltage of nmos pass transistor N1 conducting when the difference of the voltage of the second positive driving voltage and the second data line 302.

Namely, the voltage of the second data line 302 is according to the first voltage comparative result, and after judging whether first to charge to by ground voltage the positive polarity common voltage Vp-com that the first electric charge storage unit Cp provides, more further charge to the second positive driving voltage from positive polarity common voltage Vp-com; Perhaps, utilize the first voltage drive unit 311 directly by ground voltage (0 volt), charge to the second positive driving voltage.

In like manner, the first data line 301 also not necessarily can directly utilize negative polarity common voltage Vn-com to discharge after the polarity conversion.Only when the voltage of the first data line 301 and the second negative driving voltage meet the second voltage comparative result, negative polarity common voltage Vn-com just can be passed to Section Point S2 by the conducting of PMOS transistor P1, and then utilizes negative polarity common voltage Vn-com that the first data line 301 is discharged.

Second voltage comparative result herein refers to, lower than the second voltage threshold value, namely make the source electrode of PMOS transistor P1, the voltage pressure reduction between grid greater than making the required critical voltage of PMOS transistor P1 conducting when the difference of the voltage of the second negative driving voltage and the first data line 301.

That is, the voltage of the first data line 301 is according to the second voltage comparative result, and after judging whether first to be discharged to negative polarity common voltage Vn-com by ground voltage, more further be discharged to the second negative driving voltage from negative polarity common voltage Vn-com; Perhaps, utilize second voltage driver element 312 directly the first data line 301 to be discharged to the second negative driving voltage by ground voltage.

According to above stated specification as can be known, due to the conducting of nmos pass transistor N1 whether, the magnitude relationship that depends on the voltage of the second positive driving voltage and the second data line 302, therefore whether the second data line 302 can charge, except with the first comparison switch (4-1) conducting, also need further judge whether the turn-on condition of nmos pass transistor N1 is set up.

On the other hand, due to the conducting of PMOS transistor P1 whether, the size that depends on the voltage of the second negative driving voltage and the first data line 301, therefore whether the first data line 301 can discharge, except with the second comparison switch (4-1) conducting, also need further judge whether the turn-on condition of PMOS transistor P1 is set up.

Therefore, nmos pass transistor N1 and PMOS transistor P1 can be considered with the first comparison switch (4-1), second and compare the auxiliary switch that switch (4-2) links together.And the conducting of nmos pass transistor N1 just represents the first voltage comparative result for meeting, and the conducting of PMOS transistor P1 just to be equivalent to the second voltage comparative result be situation about meeting.

For the control device of Fig. 3 C, Fig. 3 D, control method of the present invention can comprise following steps according to the difference in stage:

At first, in phase one I conducting the first switches set (1-1,1-2), make the first voltage drive unit 311 provide the first positive driving voltage to the first data line 301, and make second voltage driver element 312 provide the first negative driving voltage to the second data line 302.

Secondly, in subordinate phase II conducting second switch group (2-1,2-2), make the first data line 301 with first positive driving voltage transmit positive charge to the first electric charge storage unit Cp, and make the second data line 302 with first negative driving voltage transmit negative charge to the second electric charge storage unit Cn.Moreover, make the first data line 301 and the second equal conducting of data line 302 to ground voltage in phase III III conducting the 3rd switches set (3-1,3-2).

In addition, after the polarity conversion, when the voltage of the second data line 302 and the second positive driving voltage meet the first voltage comparative result, the second data line 302 is charged, and when the voltage conforms second voltage comparative result of the voltage of the first data line 301 and the second negative driving voltage, the first data line 301 is discharged.

Further, namely according to the first voltage comparative result, and then after selecting voltage with the second data line 302 first to charge to the positive polarity common voltage Vp-com of the first electric charge storage unit Cp by ground voltage, more further charge to the second positive driving voltage; Or the second data line 302 is directly charged to the second positive driving voltage by ground voltage.And, according to the second voltage comparative result, and after selecting voltage with the first data line 301 first to be discharged to the negative polarity common voltage Vn-com of the second electric charge storage unit Cn by ground voltage, further be discharged to again the second negative driving voltage, or the first data line 301 directly is discharged to the second negative driving voltage by ground voltage.

Another preferred embodiment of the present invention is to replace aforesaid PMOS transistor, nmos pass transistor with amplifier.As shown in Figure 4, be the schematic diagram of method after carrying out the polarity conversion with control circuit collocation amplifier control capacitance preliminary filling.The numbering of each switches set herein, configuration and be connected, mode of operation is all similar to the diagram of Fig. 3 C, Fig. 3 D, therefore repeat no more.

According to shown in Figure 4, control device has also comprised a plurality of amplifiers except voltage drive unit, data line, switches set.Below illustrate with the first amplifier 421 and the second amplifier 422.And the first amplifier 421 and the second amplifier 422 have nmos pass transistor and the transistorized function of PMOS of the first embodiment.

The first amplifier 421 compares switch (4-1) by first and is electrically connected to the first electric charge storage unit Cp, and the second 422, amplifier compares switch (4-2) by second and is electrically connected to the second electric charge storage unit Cn.

First relatively relatively switch (4-2) conducting after the polarity conversion of switch (4-1) and second makes the first amplifier 421 drive according to voltage and the second positive driving voltage of the second data line 302, and the second data line 402 is charged; And the second amplifier 422 is driven according to the first data line 301 voltages and the second negative driving voltage, and the first data line 401 is discharged.

Because the operating voltage of the first amplifier 421 is provided by the first electric charge storage unit Cp, the voltage that therefore can reduce by the second data line 402 rose to for the second positive required time of driving voltage by ground voltage.Same, because the operating voltage of the second amplifier 422 is provided by the second electric charge storage unit Cn, so the voltage that can reduce by the first data line 401 dropped to for the second required time of negative driving voltage by ground voltage.

As mentioned above, the embodiment of the control device that provides with regard to Fig. 4, its control method can comprise following steps:

At first, make the first voltage drive unit 411 provide the first positive driving voltage to the first data line 401 in phase one I conducting the first switches set (1-1,1-2), make second voltage driver element 412 provide the first negative driving voltage to the second data line 402.

Then, make the first data line 401 with first positive driving voltage transmit positive charge to the first electric charge storage unit Cp in subordinate phase II conducting second switch group (2-1,2-2), allow the first electric charge storage unit Cp have positive polarity common voltage Vp-com; And make the second data line 402 with first negative driving voltage transmit negative charge to the second electric charge storage unit Cn, make the second electric charge storage unit Cn have negative polarity common voltage Vn-com.Moreover, make the first data line 401 and the second data line 402 conductings to ground voltage in phase III III conducting the 3rd switches set (3-1,3-2).

In addition, after the polarity conversion, relatively switch (4-2) of switch (4-1) and second is compared in conducting first.When first compared switch (4-1) conducting, the first amplifier 421 will drive according to voltage and the second positive driving voltage of the second data line 302, and the second data line 402 is charged.When second compared switch (4-2) conducting, the second amplifier 422 will drive according to voltage and the second negative driving voltage of the first data line 301, and the first data line 401 is discharged.

In brief, by the use of the first amplifier 421 and the second amplifier 422, the voltage of the first data line 401 and the second data line 402 can reach steady state (SS) more fast.Therefore, the method for the second preferred embodiment can reach the effect of power saving too.

Although in aforesaid preferred embodiment, all with the first electric charge storage unit Cp that stores positive charge, the second electric charge storage unit Cn that stores negative charge, electric charge storage unit is described how with the charge storage of data line before the polarity conversion, and offers other data line after the polarity conversion.But control device provides to store the number of the electric charge storage unit of positive and negative electric charge, does not need to be defined in actual applications.

In the control device with charge share function, an electric charge storage unit that is used for storing positive charge only is provided, and during an electric charge storage unit that be used for to store negative charge, the voltage that wherein being used for storing the electric charge storage unit of positive charge provides is PAVDD, and the voltage that is used for storing the electric charge storage unit of negative charge and provides is NAVDD.On the other hand, if when increasing the number of the electric charge storage unit that stores positive charge and negative charge, the combination of the common voltage that electric charge storage unit can provide is more.

As shown in Fig. 5 A, for the schematic diagram of two groups of positive and negative electric charge storage units is provided in control device.With structure, in Fig. 5 A, the connection between the control of switches set, voltage drive unit, the data line all structure with Fig. 3 C is similar.Difference is, provided herein two positive charge storage element Cp1, Cp2, and two negative charge storage element Cn1, Cn2.

Wherein, each positive charge storage element Cp1, Cp2 all arrange in pairs or groups and use a corresponding nmos pass transistor; And each negative charge storage element Cn1, Cn2 all arrange in pairs or groups and use a corresponding PMOS transistor.Be accompanied by the difference of the capacitance of each electric charge storage unit, these electric charge storage units can provide multiple possible positive polarity common voltage, and multiple possible negative polarity common voltage is given each data line.

As shown in Fig. 5 B, for when using two groups of positive and negative electric charge storage units shown in Fig. 5 A, the voltage schematic diagram that electric charge storage unit provides.When control device provides two groups of electric charge storage units, because electric charge storage unit can be by the conducting of selectivity.Therefore, further the positive driving voltage on data line is divided into positive polarity high driving voltage (PAVDD/2～PAVDD) and positive polarity low driving voltage (GND～PAVDD/2).And, with data line conducting to the first storage element Cp1 of positive polarity high driving voltage; Data line conducting to the second storage element Cp2 with the positive polarity low driving voltage.In like manner, the negative driving voltage on data line can be divided into negative polarity high driving voltage (NAVDD/2～GND) and negative polarity low driving voltage (NAVDD～NAVDD/2).And, with data line conducting to the three storage element Cn1 of negative polarity high driving voltage; Data line conducting to the four storage element Cn2 with the negative polarity low driving voltage.

As shown in Figure 6, during for the positive and negative electric charge storage unit of use n group, the voltage schematic diagram that electric charge storage unit provides.In the mode shown in similar Fig. 5 A, when n group electric charge storage unit is provided, the positive driving voltage on data line can be divided into the n decile when control device; Negative driving voltage on data line is divided into the n decile.Afterwards, be passed to respectively different electric charge storage units.

Therefore, take positive driving voltage as example, in the voltage range between PAVDD to GND, can be divided into the positive polarity common voltage of n different voltages.That is, GND, PAVDD * 1/n, PAVDD * 2/n ..., PAVDD * (n-1)/n, PAVDD.

In like manner, for negative driving voltage, in the voltage range between NAVDD to GND, also can be divided into the negative polarity common voltage of n different voltages.That is, GND, NAVDD * 1/n, NAVDD * 2/n ..., NAVDD * (n-1)/n, NAVDD.

As shown in Figure 7, be the charge share that the present invention further provides and the schematic diagram that accelerates the charge and discharge method.

A plurality of switches set are provided between voltage drive unit shown in Figure 7 and data line equally.But different from aforesaid application is that voltage drive unit herein can't the polarization conversion with being connected of data line.That is to say, the odd number voltage drive unit continues to provide positive voltage to the odd data line, and the even number voltage drive unit continues to provide negative voltage to the even data line, and just these positive driving voltages, negative driving voltage also can change along with the time.

Further the structure of research Fig. 7, can find out, the structure of showing greatly Fig. 3 C shown in Figure 7 is the basis, is aided with two and forms right PMOS transistor, the combination of nmos pass transistor.Moreover this panel does not need to carry out polarity conversion, therefore, just do not need to provide one group of switches set with data line in the electric charge conducting of carrying out remaining before the polarity conversion to ground voltage.

According to this preferred embodiment, the control device that is applied to this display panel comprises: many data lines, a plurality of voltage drive unit, a plurality of electric charge storage unit, a plurality of transistor pair, and a plurality of switches set.

According to shown in Figure 7, the first switches set (1-1,1-2) is arranged between these a plurality of voltage drive units and this a plurality of data lines, second switch group (2-1,2-2) is arranged between these a plurality of electric charge storage units and this a plurality of data lines, the 3rd switches set (3-1,3-2) is arranged at this a plurality of transistors pair and these a plurality of electric charge storage units between.

During in the first period conducting, the first voltage drive unit 711 provides the first positive driving voltage to the first data line 701 when the first switches set (1-1,1-2), and second voltage driver element 712 provides the first negative driving voltage to the second data line 702.

When second switch group (2-1,2-2) conducting, the first data line 701 with first positive driving voltage transmits its positive charge to the first electric charge storage unit Cp, at this moment, the first electric charge storage unit Cp and the first data line 701 all have positive polarity common voltage Vp-com; 702 of the second data lines with first negative driving voltage transmit its negative charge to the second electric charge storage unit Cn, and make the second electric charge storage unit Cn and the second data line 702 all have negative polarity common voltage Vn-com.

When the 3rd switches set (3-1,3-2) conducting, if the second positive driving voltage is during lower than the voltage of the first data line 701, by the conducting of the first transistor to (N11, P12), and acceleration is to the discharge of the first data line 701, if the second negative driving voltage is during higher than the voltage of the second data line 702, by the conducting of transistor seconds to (P21, N22), and acceleration is to the charging of the second data line 702.

Be positioned at equally the first transistor of first row concerning (N11, P12) with the first voltage drive unit 711, the first data line 701, the first transistor comprises nmos pass transistor N11 and the PMOS transistor P12 that is electrically connected to each other to (N11, P12), wherein, nmos pass transistor N11 and PMOS transistor P12 all are electrically connected between the first voltage drive unit 711 and the first data line 701.The source electrode of this PMOS transistor P12 is electrically connected to the source electrode of NMOS, and grid is electrically connected to the first voltage drive unit 711, and drain electrode is electrically connected to ground voltage.

Moreover, the transistor seconds that is positioned at equally secondary series with second voltage driver element 712, the second data line 702 is example to (P21, N22), and transistor seconds comprises PMOS transistor P21 and the nmos pass transistor N22 that is electrically connected to each other to (P21, N22).PMOS transistor P21 and nmos pass transistor N22 all are electrically connected between second voltage driver element 712 and the second data line 702, wherein the source electrode of nmos pass transistor N22 is electrically connected to the source electrode of PMOS transistor P21, grid is electrically connected to second voltage driver element 712, and drain electrode is electrically connected to ground voltage.

When the first switches set (1-1,1-2) and the equal conducting of the 3rd switches set (3-1,3-2), the first electric charge storage unit Cp provides the drain electrode of positive polarity common voltage Cp-com to nmos pass transistor N11 because stored the relation of positive charge in advance.

In like manner, the second electric charge storage unit Cn provides the drain electrode of negative polarity common voltage Cn-com to PMOS transistor P21 because stored the relation of negative charge in advance.

Below further illustrate during phase III III, for the data line of obtaining positive driving voltage, obtain under the change in voltage of data line of negative driving voltage, how transistor accelerates the operation of charge and discharge.

At first with the first data line 701 of using positive driving voltage as example, because the first voltage drive unit 711 is 0.2 volt at the second positive driving voltage that phase III III provides, therefore, the first transistor nmos pass transistor N11 that (N11, P12) comprised and the grid voltage of PMOS transistor P12 are 0.2 volt.

Further observing PMOS transistor P12 can find out, its source voltage is because be electrically connected to the relation of the first data line 701, and be the first data line 701 voltages, be Vp-com (+2.5 volts), grid voltage is because be connected to the relation of the first voltage drive unit 711, and is 0.2 volt.

Therefore, PMOS transistor P12 will be because of voltage pressure reduction (Vsg) conducting greater than the relation of critical voltage between source electrode, grid.That is, during lower than the voltage (positive polarity common voltage Vp-com) of the first data line 701, expression does not need to keep the positive charge that is on the first data line 701 when the second positive driving voltage.Just pass through the transistorized conducting of PMOS this moment, and then make the first data line 701 be connected to ground voltage and discharge.That is, by PMOS transistor P12, first the voltage with the first data line 701 is discharged to 0 volt by+2.5 volts.

Afterwards, during again with the first switches set (1) conducting, the first voltage drive unit 711 just only need to be promoted to 0.2 volt by 0 volt with the voltage of the first data line 701, and does not need the voltage of the first data line 701 slowly is reduced to 0.2 volt by the magnitude of voltage of 2.5 volts originally.Hence one can see that, and by this kind mode, the velocity of discharge of the first data line 701 is able to further lifting.

Then again to use the second data line 702 of bearing driving voltage as example, because second voltage driver element 712 is-0.2 volt at the second negative driving voltage that phase III III provides, therefore, PMOS transistor P21 and nmos pass transistor N22 that transistor seconds comprises (P21, N22), its grid voltage all become-0.2 volt.

With nmos pass transistor N22, its source voltage is because equate with the voltage (2.5 volts) of the second data line 702 with the relation of the second data line 702 electrical connections, grid voltage is because be connected to the relation of second voltage driver element 712, and is-0.2 volt.

Therefore, nmos pass transistor N22 will be because of the voltage pressure reduction between source electrode, grid greater than critical voltage (relation of Vgs＞Vth) and conducting.During higher than the second data line 702 voltage, expression does not need to keep the negative charge that is on the second data line 702 when the second negative driving voltage.Just by the conducting of nmos pass transistor N22, be connected to the second data line 702 earth terminal and charge this moment.That is, by nmos pass transistor N22, first the voltage with the second data line 702 charges to 0 volt by-2.5 volts.

Afterwards, in the next stage, 712 need of second voltage driver element are reduced to-0.2 volt with the voltage of the second data line 702 by 0 volt, and do not need the voltage of the second data line 702 is charged to-0.2 volt by the magnitude of voltage of-2.5 volts.Hence one can see that, and by this kind design, the charging rate of the second data line 702 is promoted.

Sum up aforesaid each preferred embodiment as can be known, the present invention is directed to control method and device that panel application provides, can reach fast data line is carried out charge and discharge, and the effect that reduces power consumption.

According to control device proposed by the invention and method, use by transistor, amplifier and switches set, allow data line can by voltage drive unit the actual driving voltage that provides, and selectivity is carried out respectively charging and discharging to data line, also allows the power consumption of control device be minimized.

According to control device proposed by the invention and method, by paired transistor, the use of switches set, allow display panel can be fast because of the change of driving voltage, and accelerate corresponding charging, the velocity of discharge.

Although aforementioned being exemplified as with the less data line of number, switches set, voltage drive unit as an example, the control device that is applied to display panel proposed by the invention is not as limit.The present invention is applicable to the control device that comprises a plurality of switches set, a plurality of voltage drive unit, many data lines.

The above is only preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.

Claims (24)

1. charge share control method, be applied to display panel control device, described control device comprises the first data line, the second data line, the first voltage drive unit, the second voltage driver element, the first electric charge storage unit, the second electric charge storage unit, the first switches set, second switch group and the 3rd switches set, wherein said the first voltage drive unit and described second voltage driver element provided respectively the first positive driving voltage and the first negative driving voltage before the polarity conversion, provide respectively the second positive driving voltage and the second negative driving voltage after described polarity conversion, it is characterized in that, described charge share control method comprises following steps:

(A) described the first switches set of conducting so that described the first voltage drive unit provides the described first positive driving voltage to described the first data line, and makes described second voltage driver element provide the described first negative driving voltage to described the second data line;

(B) the described second switch group of conducting, transmit positive charge so that have the first data line of the described first positive driving voltage to described the first electric charge storage unit, and then make described the first electric charge storage unit have the positive polarity common voltage, and make the second data line with described first negative driving voltage transmit negative charge to described the second electric charge storage unit, and then make described the second electric charge storage unit have the negative polarity common voltage;

(C) described the 3rd switches set of conducting is so that described the first data line and described the second data line are connected to ground voltage; And

(D) after described polarity conversion, when the voltage of described the second data line and the described second positive driving voltage meet the first voltage comparative result, described the second data line is charged, and when the voltage of described the first data line and the described second negative driving voltage meet the second voltage comparative result, described the first data line is discharged.

2. charge share control method according to claim 1, it is characterized in that, also comprise following steps: (E) described the first switches set of conducting, so that described the first voltage drive unit provides the described second positive driving voltage to described the second data line, and make described second voltage driver element provide the described second negative driving voltage to described the first data line.

3. charge share control method according to claim 2, is characterized in that, described step (E) comprises the following steps:

(E1) according to described the first voltage comparative result, described the second data line is charged to the described second positive driving voltage by described positive polarity common voltage, perhaps charge to the described second positive driving voltage by described ground voltage; And

(E2) according to described second voltage comparative result, described the first data line is discharged to the described second negative driving voltage by described negative polarity common voltage, perhaps be discharged to the described second negative driving voltage by described ground voltage.

4. charge share control method according to claim 1, is characterized in that, described step (B) comprises following steps:

(B1) the first sub-switch in the described second switch group of conducting, and then make described the first data line and described the first electric charge storage unit have described positive polarity common voltage; And

(B2) the second sub-switch in the described second switch group of conducting, and then make described the second data line and described the second electric charge storage unit have described negative polarity common voltage.

5. charge share control method according to claim 1, it is characterized in that, when the voltage of described the second data line and the described second positive driving voltage meet described the first voltage comparative result, represent the difference of voltage of the described second positive driving voltage and described the second data line higher than the first voltage threshold, and then by described the first electric charge storage unit, described the second data line is charged.

6. charge share control method according to claim 1, it is characterized in that, when the voltage of described the first data line and the described second negative driving voltage meet described second voltage comparative result, represent the difference of voltage of the described second negative driving voltage and described the first data line lower than the second voltage threshold value, and then by described the second electric charge storage unit, described the first data line is discharged.

7. charge share control method according to claim 1, is characterized in that, described control device comprises:

Nmos pass transistor is electrically connected to described the first voltage drive unit;

The PMOS transistor is electrically connected to described second voltage driver element;

First compares switch, be electrically connected between described the first electric charge storage unit and described nmos pass transistor, wherein, when described first relatively switch conducting after described polarity conversion, and when the voltage of described the second data line and the described second positive driving voltage meet described the first voltage comparative result, described nmos pass transistor conducting, and then utilize described the first electric charge storage unit that described the second data line is charged; And

Second compares switch, be electrically connected between described the second electric charge storage unit and described PMOS transistor, wherein, when described second relatively switch conducting after described polarity conversion, and when the voltage of described the first data line and the described second negative driving voltage meet described second voltage comparative result, described PMOS transistor turns, and then utilize described the second electric charge storage unit that described the first data line is discharged.

8. a charge share control device, be applied to display panel, it is characterized in that, described charge share control device comprises:

At least 1 switches set, comprise the first switches set, second switch group and the 3rd switches set, its conducting successively respectively before the polarity conversion, it all comprises the first sub-switch and the second sub-switch, the first end of each described the first sub-switch all is electrically connected on first node, and the first end of described the second sub-switch all is electrically connected on Section Point;

The first data line was connected to described first node before the polarity conversion, be connected to described Section Point after described polarity conversion;

The second data line was connected to described Section Point before described polarity conversion, be connected to described first node after described polarity conversion;

The first voltage drive unit is electrically connected to the second end of the first sub-switch in described the first switches set, and described the first voltage drive unit is before described polarity conversion, produce respectively the first positive driving voltage and the second positive driving voltage afterwards;

The second voltage driver element is electrically connected to the second end of the second sub-switch in described the first switches set, and described second voltage driver element is before described polarity conversion, produce respectively the first negative driving voltage and the second negative driving voltage afterwards;

The first electric charge storage unit is electrically connected to the other end of the first sub-switch in described second switch group, and described the first electric charge storage unit obtains the positive polarity common voltage by the conducting of described second switch group;

The first comparator circuit, be electrically connected to described first node, the first voltage drive unit and the first electric charge storage unit respectively, described the first comparator circuit is after described polarity conversion, according to the voltage of described the second data line and the first voltage comparative result of the described second positive driving voltage, described positive polarity common voltage is passed to described first node, and described the second data line is charged;

The second electric charge storage unit is electrically connected to the second end of the second sub-switch in described second switch group, and described the second electric charge storage unit obtains the negative polarity common voltage by the conducting of described second switch group; And

The second comparator circuit, be electrically connected to described Section Point, second voltage driver element and the second electric charge storage unit respectively, described the second comparator circuit is after described polarity conversion, according to the voltage of described the first data line and the second voltage comparative result of described the second negative driving voltage, described negative polarity common voltage is passed to described Section Point, and described the first data line is discharged.

9. charge share control device according to claim 8, it is characterized in that, the first sub-switch conducting after described polarity conversion when described the first switches set, described the first voltage drive unit is according to described the first voltage comparative result, via described first node, described the second data line is charged to the described second positive driving voltage by described positive polarity common voltage, perhaps charge to the described second positive driving voltage by ground voltage.

10. charge share control device according to claim 8, it is characterized in that, the second sub-switch conducting after described polarity conversion when described the first switches set, described second voltage driver element is according to described second voltage comparative result, via described Section Point, described the first data line is discharged to the described second negative driving voltage by described negative polarity common voltage, perhaps is discharged to the described second negative driving voltage by ground voltage.

11. charge share control device according to claim 8 is characterized in that, described the first comparator circuit comprises:

Nmos pass transistor is electrically connected to described the first voltage drive unit and described first node respectively; And

First compares switch, be electrically connected to described the first electric charge storage unit and described nmos pass transistor respectively, described first relatively switch conducting after described polarity conversion, when the voltage of described the second data line and the described second positive driving voltage meet described the first voltage comparative result, described positive polarity common voltage is passed to described first node by the conducting of described nmos pass transistor, and then described the second data line is charged.

12. charge share control device according to claim 11 is characterized in that, the grid of described nmos pass transistor is electrically connected to described the first voltage drive unit, and drain electrode and described first is compared switch and is electrically connected to, and source electrode is electrically connected to described first node;

Wherein, when the voltage of described the second data line and the described second positive driving voltage meet described the first voltage comparative result, the difference of the voltage of the described second positive driving voltage and described the second data line makes described nmos pass transistor conducting higher than the first voltage threshold, described the first electric charge storage unit is charged to described first node, and make the voltage of described the second data line rise to described positive polarity common voltage by ground voltage.

13. the charge share control device, is characterized in that according to claim 8, described the second comparator circuit comprises:

The PMOS transistor is electrically connected to described second voltage driver element and described Section Point respectively; And

Second compares switch, be electrically connected to described the second electric charge storage unit and described PMOS transistor respectively, described second relatively switch conducting after described polarity conversion, when the voltage of described the first data line and the described second negative driving voltage meet described second voltage comparative result, described negative polarity common voltage is passed to described Section Point by the transistorized conducting of described PMOS, and then described the first data line is discharged.

14. charge share control device according to claim 13 is characterized in that, the transistorized grid of described PMOS is electrically connected to described second voltage driver element, and drain electrode and described second is compared switch and is electrically connected to, and source electrode is electrically connected to described Section Point;

Wherein, when the voltage of described the first data line and the described second negative driving voltage meet described second voltage comparative result, the difference of the voltage of the described second negative driving voltage and described the first data line makes described PMOS transistor turns lower than the second voltage threshold value, described the second electric charge storage unit is discharged to described Section Point, and make the voltage of described the first data line drop to described negative polarity common voltage by ground voltage.

15. charge share control method, be applied to display panel control device, described control device comprises the first data line, the second data line, the first voltage drive unit, the second voltage driver element, the first electric charge storage unit, the second electric charge storage unit, the first switches set, the second switch group, the 3rd switches set, the 4th switches set, and first amplifier, the second amplifier, wherein said the first voltage drive unit and described second voltage driver element provided respectively the first positive driving voltage and the first negative driving voltage before the polarity conversion, provide respectively the second positive driving voltage and the second negative driving voltage after described polarity conversion, it is characterized in that, described control method comprises following steps:

(A) described the first switches set of conducting so that described the first voltage drive unit provides the described first positive driving voltage to described the first data line, and makes described second voltage driver element provide the described first negative driving voltage to described the second data line;

(B) the described second switch group of conducting, transmit positive charge so that have the first data line of the described first positive driving voltage to described the first electric charge storage unit, and then make described the first electric charge storage unit have the positive polarity common voltage, and make the second data line with described first negative driving voltage transmit negative charge to described the second electric charge storage unit, and then make described the second electric charge storage unit have the negative polarity common voltage;

(C) described the 3rd switches set of conducting is so that described the first data line and described the second data line are connected to ground voltage; And

(D) after described polarity conversion, the first comparison switch and second that described the 4th switches set of conducting comprises is switch relatively, described the first amplifier is driven by voltage and the described second positive driving voltage of described the second data line, and described the second data line is charged, and described the second amplifier is driven by voltage and the described second negative driving voltage of described the first data line, and described the first data line is discharged.

16. charge share control method according to claim 15, it is characterized in that, also comprise following steps: (E) described the first switches set of conducting, so that described the first voltage drive unit provides the described second positive driving voltage to described the second data line, and make described second voltage driver element provide the described second negative driving voltage to described the first data line.

17. charge share control method according to claim 15 is characterized in that, described step (D) comprises following steps:

(D1) with the operating voltage of described positive polarity common voltage as described the first amplifier, by described the first amplifier and then with the described second positive driving voltage, described the second data line is charged; And

(D2) with the operating voltage of described negative polarity common voltage as described the second amplifier, by described the second amplifier and then with the described second negative driving voltage, described the first data line is discharged.

18. a charge share control device is applied to display panel, it is characterized in that, described control device comprises:

At least 1 switches set, comprise the first switches set, second switch group and the 3rd switches set, it all comprises the first sub-switch and the second sub-switch, and the first sub-switch of described the first switches set, two switches set, the 3rd switches set all is electrically connected on first node, and the described second sub-switch all is electrically connected on Section Point;

The first data line is electrically connected on described display panel, and is electrically connected to described first node before the polarity conversion, is electrically connected to described Section Point after described polarity conversion, when described the 3rd switches set conducting, has ground voltage;

The second data line is electrically connected on described display panel, and is electrically connected to described Section Point before described polarity conversion, is electrically connected to described first node after described polarity conversion, when described the 3rd switches set conducting, has described ground voltage;

The first voltage drive unit, be electrically connected to the first sub-switch of described the first switches set, described the first voltage drive unit provided first positive driving voltage to described the first data line by described first node before described polarity conversion, and provided the second positive driving voltage to described the second data line after described polarity conversion;

The second voltage driver element, be electrically connected to the second sub-switch of described the first switches set, described second voltage driver element provided first negative driving voltage to described the second data line by described Section Point before described polarity conversion, and provided the second negative driving voltage to described the first data line after described polarity conversion;

The first electric charge storage unit, be electrically connected to the first sub-switch of described second switch group, described the first electric charge storage unit obtains by described first node the positive charge that described the first data line transmits, and then has the positive polarity common voltage when described second switch group conducting;

The second electric charge storage unit, be electrically connected to the second sub-switch of described second switch group, described the second electric charge storage unit obtains by described Section Point the negative charge that described the second data line transmits, and then has the negative polarity common voltage when described second switch group conducting;

The 4th switches set comprises first and compares relatively switch of switch and second;

The first amplifier, comparing switch with described first node and first respectively is electrically connected to, when described first compares switch conduction, described the first amplifier is electrically connected to described the first electric charge storage unit, voltage and the described second positive driving voltage by described the second data line drive, and described the second data line is charged; And

The second amplifier, comparing switch with described Section Point and second respectively is electrically connected to, when described second compares switch conduction, described the second amplifier is electrically connected to described the second electric charge storage unit, voltage and the described second negative driving voltage by described the first data line drive, and described the first data line is discharged.

19. charge share control method, be applied to the control device of display panel, described control device comprises the first data line, the second data line, the first voltage drive unit, the second voltage driver element, the first electric charge storage unit, the second electric charge storage unit, the first switches set, the second switch group, the 3rd switches set, the first transistor to and transistor seconds pair, wherein, described the first voltage drive unit and described second voltage driver element provide respectively the first positive driving voltage and the first negative driving voltage in first period, and provide respectively the second positive driving voltage and the second negative driving voltage in the second phase, it is characterized in that, described control method comprises following steps:

(A) described the first switches set of conducting so that described the first voltage drive unit provides the described first positive driving voltage to described the first data line, and makes described second voltage driver element provide the described first negative driving voltage to described the second data line;

(B) the described second switch group of conducting, transmit positive charge so that have the first data line of the described first positive driving voltage to described the first electric charge storage unit, make described the first electric charge storage unit have the positive polarity common voltage, and make the second data line with described first negative driving voltage transmit negative charge to described the second electric charge storage unit, make described the second electric charge storage unit have the negative polarity common voltage; And

(C) described the 3rd switches set of conducting, when the described second positive driving voltage during lower than the voltage of described the first data line, by the right conducting of described the first transistor and then to described the first data line discharge, and when the described second negative driving voltage during higher than the voltage of described the second data line, by the right conducting of described transistor seconds and then to described the second data line charging.

20. charge share control method according to claim 19, it is characterized in that, described the first transistor is to comprising nmos pass transistor and PMOS transistor, described nmos pass transistor and PMOS transistor all are electrically connected between described the first voltage drive unit and the first data line, during lower than the voltage of described the first data line, make described first data line with ground voltage be connected and discharge by the transistorized conducting of described PMOS when the described second positive driving voltage.

21. charge share control method according to claim 19, it is characterized in that, described transistor seconds is to comprising PMOS transistor and nmos pass transistor, described PMOS transistor and nmos pass transistor all are electrically connected between described second voltage driver element and the second data line, when the described second negative driving voltage during higher than the voltage of described the second data line, by the conducting of described nmos pass transistor, and make described the second data line be connected with ground voltage and charge.

22. a charge share control device is applied to display panel, it is characterized in that, described control device comprises:

The first data line is electrically connected to described display panel;

The second data line is electrically connected to described display panel;

The first voltage drive unit provides the first positive driving voltage in first period to described the first data line, provides the second positive driving voltage in the second phase to described the first data line;

The second voltage driver element provides the first negative driving voltage in described first period to described the second data line, provides the second negative driving voltage in the described second phase to described the second data line;

At least 1 switches set, comprise the first switches set, second switch group and the 3rd switches set, it all comprises the first sub-switch and the second sub-switch, wherein said the first switches set is electrically connected between each described data line and each described voltage drive unit, and makes described the first data line have the described first positive driving voltage and described the second data line has the described second negative driving voltage in described first period in described first period;

The first electric charge storage unit by described second switch group and described the first data line conducting, and then obtains the positive polarity common voltage;

The second electric charge storage unit by described second switch group and described the second data line conducting, and then obtains the negative polarity common voltage;

The first transistor pair is electrically connected on ground voltage, described the first voltage drive unit and described the first data line, and when described the 3rd switches set conducting, described the first transistor is to being electrically connected on described the first electric charge storage unit; And

Transistor seconds pair is electrically connected on ground voltage, described second voltage driver element and described the second data line, and when described the 3rd switches set conducting, described transistor seconds is to being electrically connected on described the second electric charge storage unit;

When described the 3rd switches set conducting, if the described second positive driving voltage is lower than the voltage of described the first data line, by described the first transistor to described the first data line is discharged, if and the described second negative driving voltage is higher than the voltage of described the second data line, by described transistor seconds to described the second data line is charged.

23. control device according to claim 22 is characterized in that, described the first transistor is to comprising:

Nmos pass transistor is electrically connected between described the first voltage drive unit and described the first data line; And

The PMOS transistor, its source electrode is electrically connected to described the first data line and described nmos pass transistor, and grid is electrically connected to described the first voltage drive unit, and drain electrode is electrically connected to described ground voltage;

Wherein, during lower than the voltage of described the first data line, described the first data line discharges with described ground voltage by the transistorized conducting of described PMOS when the described second positive driving voltage.

24. control device according to claim 22 is characterized in that, described transistor seconds is to comprising:

The PMOS transistor is electrically connected between described second voltage driver element and described the second data line; And

Nmos pass transistor, its source electrode is electrically connected to described the second data line and PMOS transistor, and grid is electrically connected to described second voltage driver element, and drain electrode is electrically connected to described ground voltage;

Wherein, during higher than the voltage of described the second data line, described the second data line charges with described ground voltage by the conducting of described nmos pass transistor when the described second negative driving voltage.

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