CN101079240A - System for displaying image and liquid crystal display driving method - Google Patents

System for displaying image and liquid crystal display driving method Download PDF

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Publication number
CN101079240A
CN101079240A CN 200610078449 CN200610078449A CN101079240A CN 101079240 A CN101079240 A CN 101079240A CN 200610078449 CN200610078449 CN 200610078449 CN 200610078449 A CN200610078449 A CN 200610078449A CN 101079240 A CN101079240 A CN 101079240A
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signal
voltage
raise
electric capacity
pulse signal
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CN 200610078449
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CN100587785C (en
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顾瑄峻
陈维成
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TPO Displays Corp
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Toppoly Optoelectronics Corp
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Abstract

The invention discloses an image display system and driving method of LCD, which contains driving circuit, wherein the driving circuit is composed of replacement scratch memory, voltage pusher and sampling switch; the replacement scratch memory receives input pulse signal and moves the input pulse signal to output an output pulse signal; the voltage pusher connects the replacement scratch memory electrically to receive the output pulse signal, which generates a pushing voltage to output a pushing signal during energy generating stage of output pulse signal; the sampling switch is electrical connected voltage pusher to receive the pushing signal, which controls the data signal of sampling switch.

Description

Be used for the system of show image and the driving method of liquid crystal indicator
Technical field
The present invention relates to a kind of system of show image and driving method of liquid crystal indicator of being used for, particularly relate to a kind of system that is used for show image of low voltage drive and the driving method of liquid crystal indicator.
Background technology
In thin film electrocrystal liquid crystal display device, electric crystal on the liquid crystal panel can be divided into amorphous silicon membrane electric crystal (α-Si TFT) and polysilicon membrane electric crystal (Poly-Si TFT) according to its structure and processing procedure, wherein the polysilicon membrane electric crystal has lower cut-off voltage and higher electronics rate travel, therefore, the liquid crystal panel comparison power saving of polysilicon membrane electric crystal also can be integrated driving circuit in panel.
See also shown in Figure 1ly, a liquid crystal indicator 1 is to comprise a polysilicon liquid crystal panel 10 and time schedule controller 11, on polysilicon liquid crystal panel 10 is to be formed with a voltage level shift unit 12, one scan line drive circuit 13, a plurality of gate sweep traces 14 1-14 m, a data line driving circuit 15, a plurality of source electrode data lines 16 1-16 nAnd a pixel array 17, wherein scan line drive circuit 13 is to comprise a plurality of shift registors 131, data line driving circuit 15 is to comprise a plurality of shift registors 151 and a plurality of sampling/retainer 152.
Time schedule controller 11 is with the manufacturing of VLSI processing procedure, and it is to operate in 3V and produce a gate initial pulse signal SP G, gate clock pulse CLK G, source electrode initial pulse signal SP S, source electrode clock pulse CLK SAnd document signal DATA, the voltage level of these signals is between 0V-3V.Voltage level shift unit 12 is to operate in 9V, and it is with gate initial pulse signal SP with electric crystal or resistance even load dividing potential drop mode G, gate clock pulse CLK G, source electrode initial pulse signal SP S, source electrode clock pulse CLK SAnd the voltage level of document signal DATA is converted to the cut-off voltage (about 1V-4V) of 9V to overcome the polysilicon membrane electric crystal by 3V, in order to do making circuit on the polysilicon liquid crystal panel 10 can correctly handle the output signal of time schedule controller 11.
Shift registor 131 is to operate in 9V and gate clock pulse CLK GFrequency under, it is the gate initial pulse signal SP that is connected in series each other and is shifted GWith in regular turn at gate sweep trace 14 1-14 mLast generation scanning impulse is used and is opened each gate sweep trace 14 1-14 mThe membrane transistor of last pixel array 17.Shift registor 151 is to operate in 9V and source electrode clock pulse CLK SFrequency under, it is the source electrode initial pulse signal SP that is connected in series each other and is shifted SProducing scanning impulse in regular turn to sampling/retainer 152, sampling/retainer 152 is to receive each source electrode pulse in regular turn document signal DATA being taken a sample, and with sampling result through source electrode data line 16 1-16 nExport pixel array 17 to.
Under the framework of Fig. 1, each circuit on the polysilicon liquid crystal panel 10 is to operate in 9V, yet in fact, the circuit of part only need operate in 5V and get final product normal operation.As shown in Figure 2, scan line drive circuit 13 more comprises a plurality of voltage level shift units 132, and data line driving circuit 15 more comprises a plurality of voltage level shift units 153, and voltage level shift unit 12 is to operate in 5V with gate initial pulse signal SP G, gate clock pulse CLK G, source electrode initial pulse signal SP S, source electrode clock pulse CLK SAnd the voltage level of document signal DATA is converted to 5V by 3V.
Shift registor 131 is to operate in 5V and be shifted gate initial pulse signal SP GProducing scanning impulse in regular turn, voltage level shift unit 132 exports gate sweep trace 14 to after the voltage level of each scanning impulse is converted to 9V by 5V again 1-14 mShift registor 151 is to operate in 5V and be shifted source electrode initial pulse signal SP STo produce the source electrode pulse in regular turn, voltage level shift unit 153 exports sampling/retainer 152 to after the voltage level of each source electrode pulse is converted to 9V by 5V again, sampling/retainer 152 be receive each source electrode pulse with in regular turn to document signal DATA sampling, and sampling result seen through source electrode data line 16 1-16 nExport pixel array 17 to.
In Fig. 2 because the operating voltage of the shift registor 151 of data line driving circuit 15 is to reduce to 5V by 9V, so the data line driving circuit 15 of Fig. 2 is than the power saving of Fig. 1.Yet the shift registor 151 of Fig. 2 must cooperate extra voltage level shift unit 153 can be enough the voltage location of output signal to be converted to 9V by 5V, so data line driving circuit 15 costs under this framework are higher.On the other hand, extra voltage level shift unit 153 is still and operates in 9V, so the still not enough power saving of the data line driving circuit 15 of Fig. 2.
This shows that above-mentioned existing liquid crystal indicator obviously still has inconvenience and defective, and demands urgently further being improved in product structure and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks the road that solves painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of new system that is used for show image and the driving method of liquid crystal indicator, just become the current industry utmost point to need improved target.
Because the defective that above-mentioned existing liquid crystal indicator exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of new system that is used for show image and the driving method of liquid crystal indicator, can improve general existing liquid crystal indicator, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective that existing liquid crystal indicator exists, and provide a kind of novel system that is used for show image and the driving method of liquid crystal indicator, technical matters to be solved is to make it operate in low-voltage and signal raised by low-voltage position standard to be high voltage level, thereby is suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of system according to the present invention's proposition, be to be used for show image, it is to comprise a LCD drive circuits, wherein this LCD drive circuits comprises: a shift registor is that reception one input pulse signal and this input pulse signal that is shifted are to export pulse signal; One voltage push actuator is to electrically connect receiving this output pulse signal with this shift registor, and its be during this output pulse signal activation in generation one raise voltage and raise signal to export one; And a sampling switch, be to electrically connect this voltage push actuator to raise signal to receive this, wherein this to raise signal be this sampling switch of control document signal of taking a sample.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid system, wherein said driving circuit is a data line driving circuit.
Aforesaid system, wherein said voltage push actuator produce a pre-charge pressure and this respectively with a second phase between first phase when this output pulse signal activation to raise voltage and raise signal to export this.
Aforesaid system, wherein said voltage push actuator comprises: an electric capacity, be to have one first end and one second end, this electric capacity is to be recharged between this first phase producing this pre-charge pressure at this first end, and the voltage of this second end of this electric capacity is raised to produce this at this first end in this second phase to raise voltage; And an output terminal, be this first end that electrically connects this electric capacity, and between this first phase, raise voltage according to this pre-charge pressure and this respectively and raise signal to export this with this second phase.
Aforesaid system, wherein said logic control circuit is to comprise: a NAND lock is that this input pulse signal of reception and this output pulse signal are to export one first controlling signal; One the one NOT lock is to receive this first controlling signal to export one second controlling signal; And one the 2nd NOT lock, be to receive this output pulse signal to export one the 3rd controlling signal.
Aforesaid system, wherein said voltage push actuator comprises: an electric capacity is to have one first end and one second end, and wherein this first end is to electrically connect a NAND lock to receive this first controlling signal; One first electric crystal, its source electrode is this second end that electrically connects this electric capacity, its drain is to electrically connect a NOT lock to receive this second controlling signal, and this second controlling signal is that charging produces this pre-charge pressure with this second end at this electric capacity to this electric capacity between this first phase, and wherein the voltage of this of this electric capacity first end is to be raised by this first controlling signal in this second phase to produce this with this second end at this electric capacity and raise voltage; One output terminal is that this second end with this first electric capacity electrically connects, and raises voltage according to this pre-charge pressure and this respectively with this second phase raise signal to export this between this first phase; And one second electric crystal, its source electrode is to electrically connect an earthing power supply, its drain is this second end that electrically connects this electric capacity, its gate is to electrically connect the 2nd NOT lock receiving the 3rd controlling signal, this second electric crystal be according to the 3rd controlling signal with this second end of this electric capacity of conducting and this earthing power supply in order to do making this capacitor discharge to this earthing power supply.
Aforesaid system, wherein said sampling switch comprises: one the 3rd electric crystal, its drain is to receive this document signal, its gate is to electrically connect this voltage push actuator to raise signal to receive this, and the 3rd electric crystal is to be subjected to this to raise signal control to export the source electrode of this document signal in the 3rd electric crystal, wherein this raise signal this raise the cut-off voltage of voltage greater than the 3rd electric crystal.
Aforesaid system, the gate of wherein said first electric crystal is to electrically connect to receive this second controlling signal with its drain.
Aforesaid system, the gate of this first electric crystal of wherein said voltage push actuator is that this output terminal that electrically connects the voltage push actuator of a prime raises signal with this that receives this preceding step voltage push actuator.
Aforesaid system, it more comprises: a display panels is to electrically connect this LCD drive circuits receiving this document signal, and according to this document signal show image.
Aforesaid system, it more comprises: an electronic installation is to have this display panels and an input block, and this input block and this display panels are coupled, and provide input to this display panels, so that this display panels show image.
Aforesaid system, wherein said electronic installation is to be mobile phone, numerical digit camera, personal digital assistant, notebook computer, desktop computer, televisor, automobile-used display or Portable DVD player.
The object of the invention to solve the technical problems also realizes by the following technical solutions.The driving method of a kind of liquid crystal indicator that proposes according to the present invention, in order to raise a pulse signal of a shift registor, this driving method comprises: one raises step, is to raise voltage with one in during this pulse signal activation to raise this pulse signal and export one and raise signal; And a sampling procedure, be to open a sampling switch with the document signal of taking a sample with this pulse signal that has raised.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The driving method of aforesaid liquid crystal indicator, the wherein said step that raises is to produce a pre-charge pressure and this respectively with a second phase between first phase when this pulse signal activation to raise voltage and raise signal to export this.
The driving method of aforesaid liquid crystal indicator, the wherein said step that raises comprises: charging produces this pre-charge pressure with one first end at this electric capacity to an electric capacity between this first phase; The voltage that raises one second end of this electric capacity in this second phase produces this with this first end at this electric capacity and raises voltage; And at this first end of this electric capacity and between this first phase, raise voltage according to this pre-charge pressure and this respectively and export this and raise signal with this second phase.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, major technique of the present invention thes contents are as follows:
In order to achieve the above object, the invention provides a kind of system that is used for show image, comprise LCD drive circuits, this driving circuit comprises a shift registor, a voltage push actuator and a sampling switch.Wherein shift registor is to receive an input pulse signal and this input pulse signal that is shifted to export pulse signal, the voltage push actuator is to electrically connect to receive the output pulse signal with shift registor, and its be during output pulse signal activation in generation one raise voltage and raise signal to export one, sampling switch is to electrically connect the voltage push actuator to raise signal with reception, and wherein raising signal is control sampling switch output document signal.
In addition, in order to achieve the above object, the present invention provides a kind of driving method of liquid crystal indicator in addition, it is in order to raising a pulse signal of a shift registor, and this driving method comprises following steps: raise voltage with one in during the pulse signal activation and raise pulse signal and export one and raise signal; And open a sampling switch with the document signal of taking a sample with the pulse signal that has raised.
By technique scheme, the present invention is used for show image is that the driving method of system and liquid crystal indicator has following advantage at least:
The present invention is used for the system of show image and the driving method of liquid crystal indicator, shift registor and voltage push actuator are to operate in low voltage, the voltage push actuator is the output pulse signal that raises shift registor, thereby exportable high voltage position standard raise signal, so driving circuit not only can correctly be controlled the sampling switch start with the signal of high voltage, and can reduce the power consumption of shift registor and voltage push actuator.
In sum, the present invention has above-mentioned plurality of advantages and practical value, no matter it all has bigger improvement on product structure, method or function, obvious improvement is arranged technically, and produced handy and practical effect, and more existing liquid crystal indicator has the multinomial effect of enhancement, thus be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is for showing a block diagram of known LCD drive circuits.
Fig. 2 is for showing another block diagram of known LCD drive circuits.
Fig. 3 is for showing the block diagram according to the LCD drive circuits of preferred embodiment of the present invention.
Fig. 4 is each pulse signal in the displayed map 3 and an oscillogram that raises signal.
Fig. 5 is for showing another block diagram according to the LCD drive circuits of preferred embodiment of the present invention.
Fig. 6 is for showing the block diagram again according to the LCD drive circuits of preferred embodiment of the present invention.
Fig. 7 is the output pulse of shift registor in the displayed map 6 and an oscillogram that raises signal of voltage push actuator.
Fig. 8 is a controlling signal in the displayed map 6 and an oscillogram that raises signal.
Fig. 9 is a circuit diagram of voltage push actuator and sampling switch in the displayed map 6.
Figure 10 is another circuit diagram of voltage push actuator and sampling switch in the displayed map 6.
Figure 11 is for showing a controlling signal and an oscillogram that raises signal among Figure 10.
Figure 12 is a circuit diagram again of voltage push actuator and sampling switch in the displayed map 6.
Figure 13 is for showing a controlling signal and an oscillogram that raises signal among Figure 12.
Figure 14 is for showing the synoptic diagram according to the system that is used for show image of preferred embodiment of the present invention.
Figure 15 is the step of demonstration according to the driving method of the liquid crystal indicator of preferred embodiment of the present invention.
1: liquid crystal indicator 10: the polysilicon liquid crystal panel
11: time schedule controller 12: the voltage level shift unit
13: scan line drive circuit 131: shift registor
132: voltage level shift unit 14 1-14 n: shift registor
15: data line driving circuit 151: the displacement working storage
152: sampling/retainer 153: the voltage level shift unit
16 1-16 n: source electrode data line 17: pixel array
2: data line driving circuit 21: the displacement working storage
22: 221: the first electric crystals of voltage push actuator
Electric crystal 223 in 222: the second: electric capacity
223A: the first end 223B: second end
224: output terminal 23: sampling switch
Electric crystal 24 in 231: the three: retainer
25: 251: the one NOT locks of logic control circuit
252: the two NOT lock 253:NAND locks
3: liquid crystal indicator 30: liquid crystal panel
31: time schedule controller 32: the voltage level shift unit
33: data line driving circuit 34 1-34 m: the gate sweep trace
35 1-35 n: source electrode data line 36: pixel array
4: show image be the system 5: electronic installation
51: input block CLK G: the gate clock pulse
CLK S: source electrode clock pulse DATA: document signal
S 1: the first controlling signal S 2: second controlling signal
S 3: the 3rd controlling signal SB, SB k, SB 1-SB n: raise signal
SP G: gate initial pulse signal SP S: source electrode initial pulse signal
SR In: input pulse signal SR Out: the output pulse signal
SR1-SRn: pulse signal T 1: between the first phase
T 2: second phase V Boost: raise voltage
V p: pre-charge pressure V SS: earthing power supply
S01-S02: what be used for show image is the step of the driving method of system and liquid crystal indicator
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, the system that is used for show image that foundation the present invention is proposed and its embodiment of driving method, structure, method, step, feature and the effect thereof of liquid crystal indicator, describe in detail as after.
See also shown in Figure 3ly, comprise a LCD drive circuits 2 according to a kind of system that is used for show image of preferred embodiment of the present invention, driving circuit 2 comprises at least one shift registor 21, at least one voltage push actuator 22 and at least one sampling switch 23.Wherein shift registor 21 is to receive an input pulse signal SR InAnd this input pulse signal SR that is shifted InTo export pulse signal SR Out, voltage push actuator 22 is to electrically connect to receive output pulse signal SR with shift registor 21 Out, and its be during output pulse signal SRout activation in generation one raise voltage V BoostRaise signal SB to export one, sampling switch 23 is to electrically connect voltage push actuator 22 to raise signal SB with reception, and wherein raising signal SB is control sampling switch 23 samplings one document signal DATA.
In the present embodiment, driving circuit 2 is to be the data line driving circuit, and shift registor 21 is to operate in 5V with voltage push actuator 22, input pulse signal SR InWith output pulse signal SR OutCeiling voltage position standard be 5V, voltage push actuator 22 receives output pulse signal SR OutAfter be can be at output pulse signal SR OutT between the first phase during activation 1The interior pre-charge pressure V that produces pBe charged in advance from 0V near the operating voltage of voltage push actuator 22 will raise signal SB, then at output pulse signal SR OutSecond phase T during activation 2In produce one by electric capacity and raise voltage V BoostRaise to about 9V with the voltage level that will raise signal, the waveform of each signal is as shown in Figure 4.Thus, when the shift registor in the driving circuit 2 21 operated in lower voltage, voltage push actuator 22 not only can replace the voltage level shift unit and correctly export the signal of high voltage, and can operate in lower voltage thereby can reduce power consumption.
See also shown in Figure 5, what be used for show image is that turnkey contains a liquid crystal indicator 3, liquid crystal indicator 3 is to comprise a display panels 30 and time schedule controller 31, display panels 30 is to electrically connect driving circuit 2 with reception document signal DATA, and according to document signal DATA show image.
Be to be formed with a voltage level shift unit 32, one scan line drive circuit 33, a plurality of gate sweep traces 34 on the display panels 30 1-34 m, data line driving circuit 2, a plurality of source electrode data lines 35 1-35 nAnd a pixel array 36, scan line drive circuit 33 is to see through gate sweep trace 34 1-34 mElectrically connect with pixel array 36, data line driving circuit 2 is to see through source electrode data line 35 1-35 nElectrically connect with pixel array 36.Wherein, scan line drive circuit 33 is to comprise a plurality of shift registors 331 and a plurality of voltage level shift units 332, and data line driving circuit 2 is to comprise a plurality of shift registors 21, logic control circuit 25, voltage push actuator 22, sampling switch 23 and retainer 24.
In the present embodiment, time schedule controller 31 is to operate in 3V and export gate initial pulse signal SP G, gate clock pulse CLK G, source electrode clock pulse CLK S, source electrode initial pulse signal SP SAnd document signal DATA.Voltage level shift unit 32 is to operate in 5V and with gate initial pulse signal SP C, gate clock pulse CLK C, source electrode clock pulse CLK S, source electrode initial pulse signal SP SAnd the voltage level of document signal DATA is converted to 5V by 3V.
Shift registor 331 is to operate in 5V and gate clock pulse CLK GFrequency under, its be connected in series each other and the gate initial pulse signal that is shifted producing scanning impulse, voltage level shift unit 332 with the voltage level of each scanning impulse by 5V be converted to 9V after export gate sweep trace 34 again to 1-34 m
See also shown in Figure 6ly, shift registor 21 is to operate in 5V and source electrode clock pulse CLK SFrequency, it is to be connected in series each other with in regular turn with source electrode initial pulse signal SP SClock pulse CLK is shifted half SThe output of all after dates since shift registor 21 be connected in series each other so, the output pulse signal of each shift registor 21 is the input pulse signals as next shift registor 21, the pulse signal SR of each shift registor 21 output terminal 1-SR nWaveform as shown in Figure 7.
Please consult shown in Figure 6ly again, each logic control circuit 25 is to comprise a NAND lock 253, one the one NOT lock 251 and one the 2nd NOT lock 252.If k is 1 to n positive integer, with k logic control circuit 25, NAND lock 253 is received pulse signal SR K-1With pulse signal SR kTo export one first controlling signal S 1, a NOT lock 251 is to receive and the reverse first controlling signal S 1To export one second controlling signal S 2, the 2nd NOT lock 252 is to receive and reverse impulse signal SR kTo export one the 3rd controlling signal S 3, the waveform of these control signals is as shown in Figure 8.In addition, because pulse signal SR K-1, SR kCeiling voltage position standard be 5V, so the ceiling voltage position standard of these control signals also is 5V.
In addition, see also shown in Figure 9, each voltage push actuator 22 is to comprise an electric capacity 223, one first electric crystal 221, an output terminal 224 and one second electric crystal 222, and electric capacity 223 is to have one first end 223A and one second end 223B, and each sampling switch 23 is to comprise one the 3rd electric crystal 231.
With k voltage push actuator 22, it is to electrically connect k logic control circuit 25 and k sampling switch 23, and the first end 223A of electric capacity 223 electrically connects NAND lock 253 to receive the first controlling signal S 1The source electrode of first electric crystal 221 is the second end 223B that electrically connect electric capacity 223, and its drain and gate are to electrically connect a NOT lock 251 to receive the second controlling signal S 2The source electrode of second electric crystal 222 is to electrically connect an earthing power supply V SS, its drain is the second end 223B that electrically connects electric capacity 223, its gate is to electrically connect the 2nd NOT lock 252 to receive the 3rd controlling signal S 3Output terminal 224 is to electrically connect the second end 223B of electric capacity 223 and the gate of the 3rd electric crystal 231.
See also Fig. 8 and shown in Figure 9, T between the first phase 1Before, because the 3rd controlling signal S 3Be for high voltage 5V therefore second electric crystal 222 are conductings, so electric capacity 223 is to earthing power supply V SSNear 0V, output terminal 224 is to raise signal SB according to low-voltage 0V output in order to do the voltage that makes the first end 223A and output terminal 224 in discharge k
T between the first phase 1The time, the second controlling signal S 2Be to be the high levels first controlling signal S 1With the 3rd controlling signal S 3Be to be low-voltage 0V, therefore first electric crystal 221 is that the conducting and second electric crystal 222 are non-conduction, so electric capacity 223 and earthing power supply V SSBe and open circuit, the second controlling signal S 2Be to produce pre-charge pressure V to electric capacity 223 chargings at output terminal 224 p, output terminal 224 is according to pre-charge pressure V pOutput raises signal SBk, wherein pre-charge pressure V pSize be subjected to the restriction of first electric crystal 221 and be about 3V-4V.
At second phase T 2The time, the first controlling signal S 1Be to be low-voltage 0V for the high voltage 5V second controlling signal S2 and the 3rd controlling signal S3, therefore first electric crystal 221 is non-conduction with second electric crystal 222, so electric capacity 223 and earthing power supply V SSWith the second controlling signal S 2Be and open circuit, the current potential of electric capacity 223 just is only to be subjected to the first controlling signal S 1Control.On the other hand, the first controlling signal S 1Be to raise the first end 223A of electric capacity 223, make the voltage of the second end 223B by pre-charge pressure V to high voltage 5V pRaised 5V again, thereby can produce at the second end 223B and to raise voltage V Boost, output terminal 224 is according to raising voltage V BoostRaise signal SB with output kWherein raise voltage V BoostBe about 9V, so raise signal SB kBe enough to overcome the cut-off voltage of the 3rd electric crystal 231.
Then at second phase T 2Afterwards, the 3rd controlling signal S 3Be that control second electric crystal 222 conductings make electric capacity 223 and earthing power supply V SSElectrically connect, electric capacity 223 is to be discharged to earthing power supply V SSMake the second end 223B and output terminal 224 be reduced to low-voltage 0V, output terminal 224 is to raise signal SB according to low-voltage 0V output k
The 3rd electric crystal 224 is raised signal SB kControl, and the drain of the 3rd electric crystal 231 is to receive document signal DATA, its gate is to electrically connect output terminal 224 to raise signal SB with reception k, because at second phase T 2The time raise signal SB kVoltage level must be higher than the cut-off voltage of the 3rd electric crystal 231, so the time the 3rd electric crystal 231 be that conducting is to export document signal DATA to retainer 24 from its source electrode.
Please consult Fig. 6 and shown in Figure 7 again, voltage push actuator 22 received pulse signals raise signal SB with output 1-SB n To sampling switch 23, in order to do making the 23 couples of document signal DATA of sampling switch sampling and retainer 24 acquisition document signal DATA, thereby document signal DATA can correctly be sent to each source electrode data line 35 1-35 nOn.
See also shown in Figure 10ly, the 1st voltage push actuator 22 is one the 0th voltage push actuator 22 of can splicing.In this framework, the framework of the 0th voltage push actuator 22 is identical with voltage push actuator 22 shown in Figure 7, different is, the 1st to the n voltage push actuator 22 gate of first electric crystal 221 are output terminals 224 of electrically connecting last voltage push actuator 22 to receive the signal that raises that last voltage push actuator 22 produces, therefore raise voltage V when the voltage that raise signal is pushed to rise to BoostIn the time of (9V), raising signal is first electric crystal 221 of pairing the 3rd electric crystal 231 of this step voltage push actuator of conducting simultaneously and next stage voltage push actuator, thereby can guarantee more the 1st voltage push actuator 22 after voltage push actuator 22 can normal operation, it is as shown in figure 11 that signal is gone in the output of the 0th and the 1st voltage push actuator 22.
In the foregoing embodiments, the electric crystal in the voltage push actuator 22 is to realize with NMOS.In addition, as shown in figure 12, electric crystal in the voltage push actuator 22 is can PMOS to realize, inputs in the voltage push actuator 22 after the controlling signal that inputs to voltage push actuator 22 this moment all needs oppositely again, raises signal SB in order to do voltage push actuator 22 can correctly be produced k, it is as shown in figure 13 that signal is gone in the output of voltage push actuator 22.
See also shown in Figure 14, one system 4 that is used for show image comprises an electronic installation 5, electronic installation 5 is display panels 30 and the input blocks 51 with previous embodiment, input block 51 and display panels 30 couplings, and provide input to display panels 30, so that display panels 30 show images.Electronic installation 5 can be liquid crystal indicator, also can be mobile phone, numerical digit camera, personal digital assistant, notebook computer, desktop computer, televisor, automobile-used display or Portable DVD player etc.
Seeing also shown in Figure 15ly, is in order to raising a pulse signal of a shift registor according to the driving method of a kind of liquid crystal indicator of preferred embodiment of the present invention, and this driving method comprises step S01 and step S02.Step S01 raises voltage with one in during the pulse signal activation to raise pulse signal and export one and raise signal; Step S02 opens a sampling switch with the document signal of taking a sample with the pulse signal that has raised.
In step S01, it is to produce pre-charge pressure to electric capacity charging with one first end at this electric capacity earlier between a first phase, then the voltage that raises one second end of electric capacity in a second phase produces with first end at electric capacity and raises voltage, thereby first end of electric capacity voltage during with the second phase between the first phase is respectively pre-charge pressure and raises voltage, makes that raising signal is able to export with raising voltage according to pre-charge pressure.
Because the driving method of present embodiment is to can be applicable in the LCD drive circuits of earlier figures 3 to Figure 14, components identical is to have identical operations mode and effect, and detailed enforcement aspect and further instruction are to discuss in previous embodiment, so repeat no more.
In sum, because of complying with the system of show image and the driving method of liquid crystal indicator of being used for of the present invention, shift registor and voltage push actuator are to operate in low voltage, the voltage push actuator is the output pulse signal that raises shift registor, thereby exportable high voltage position standard raise signal, so driving circuit not only can correctly be controlled the sampling switch start with the signal of high voltage, and can reduce the power consumption of shift registor and voltage push actuator.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.

Claims (15)

1, a kind of system is to be used for show image, and it is to comprise a LCD drive circuits, it is characterized in that wherein this LCD drive circuits comprises:
One shift registor is that reception one input pulse signal and this input pulse signal that is shifted are to export pulse signal;
One voltage push actuator is to electrically connect receiving this output pulse signal with this shift registor, and its be during this output pulse signal activation in generation one raise voltage and raise signal to export one; And
One sampling switch is to electrically connect this voltage push actuator to raise signal to receive this, wherein this to raise signal be this sampling switch of control document signal of taking a sample.
2, system according to claim 1 is characterized in that wherein this driving circuit is a data line driving circuit.
3, system according to claim 1 is characterized in that this voltage push actuator wherein is to produce a pre-charge pressure and this respectively with a second phase between first phase when this output pulse signal activation to raise voltage and raise signal to export this.
4, system according to claim 3 is characterized in that wherein this voltage push actuator comprises:
One electric capacity is to have one first end and one second end, and this electric capacity is to be recharged between this first phase producing this pre-charge pressure at this first end, and the voltage of this second end of this electric capacity is raised to produce this at this first end in this second phase to raise voltage; And
One output terminal is this first end that electrically connects this electric capacity, and raises voltage according to this pre-charge pressure and this respectively with this second phase raise signal to export this between this first phase.
5, system according to claim 1 is characterized in that it more comprises a logic control circuit, and wherein this logic control circuit is to comprise:
One NAND lock is that this input pulse signal of reception and this output pulse signal are to export one first controlling signal;
One the one NOT lock is to receive this first controlling signal to export one second controlling signal; And
One the 2nd NOT lock is to receive this output pulse signal to export one the 3rd controlling signal.
6, system according to claim 5 is characterized in that wherein this voltage push actuator comprises:
One electric capacity is to have one first end and one second end, and wherein this first end is to electrically connect a NAND lock to receive this first controlling signal;
One first electric crystal, its source electrode is this second end that electrically connects this electric capacity, its drain is to electrically connect a NOT lock to receive this second controlling signal, and this second controlling signal is that charging produces this pre-charge pressure with this second end at this electric capacity to this electric capacity between this first phase, and wherein the voltage of this of this electric capacity first end is in this. the second phase is raised by this first controlling signal and produces this with this second end at this electric capacity and raise voltage;
One output terminal is that this second end with this first electric capacity electrically connects, and raises voltage according to this pre-charge pressure and this respectively with this second phase raise signal to export this between this first phase; And
One second electric crystal, its source electrode is to electrically connect an earthing power supply, its drain is this second end that electrically connects this electric capacity, its gate is to electrically connect the 2nd NOT lock receiving the 3rd controlling signal, this second electric crystal be according to the 3rd controlling signal with this second end of this electric capacity of conducting and this earthing power supply in order to do making this capacitor discharge to this earthing power supply.
7, system according to claim 6 is characterized in that wherein this sampling switch comprises:
One the 3rd electric crystal, its drain is to receive this document signal, its gate is to electrically connect this voltage push actuator to raise signal to receive this, and the 3rd electric crystal is to be subjected to this to raise signal control to export the source electrode of this document signal in the 3rd electric crystal, wherein this raise signal this raise the cut-off voltage of voltage greater than the 3rd electric crystal.
8, system according to claim 6 is characterized in that wherein the gate of this first electric crystal is to electrically connect to receive this second controlling signal with its drain.
9, system according to claim 6 is characterized in that the gate of this first electric crystal of this voltage push actuator wherein is that this output terminal that electrically connects the voltage push actuator of a prime raises signal with this that receives this preceding step voltage push actuator.
10, system according to claim 1 is characterized in that it more comprises:
One display panels is to electrically connect this LCD drive circuits receiving this document signal, and according to this document signal show image.
11, system according to claim 10 is characterized in that it more comprises:
One electronic installation is to have this display panels and an input block, and this input block and this display panels are coupled, and provide input to this display panels, so that this display panels show image.
12, system according to claim 11 is characterized in that wherein this electronic installation is to be mobile phone, numerical digit camera, personal digital assistant, notebook computer, desktop computer, televisor, automobile-used display or Portable DVD player.
13, a kind of driving method of liquid crystal indicator in order to raise a pulse signal of a shift registor, is characterized in that this driving method comprises:
One raises step, is to raise voltage with one in during this pulse signal activation to raise this pulse signal and export one and raise signal; And
One sampling procedure is to open a sampling switch with the document signal of taking a sample with this pulse signal that has raised.
14, the driving method of liquid crystal indicator according to claim 13, wherein this to raise step be to produce a pre-charge pressure and this respectively with a second phase between first phase when this pulse signal activation to raise voltage and raise signal to export this.
15, the driving method of liquid crystal indicator according to claim 14 is characterized in that wherein this raises step to comprise:
Charging produces this pre-charge pressure with one first end at this electric capacity to an electric capacity between this first phase;
The voltage that raises one second end of this electric capacity in this second phase produces this with this first end at this electric capacity and raises voltage; And
At this first end of this electric capacity and between this first phase, raise voltage according to this pre-charge pressure and this respectively and export this and raise signal with this second phase.
CN200610078449A 2006-05-26 2006-05-26 System for displaying image and liquid crystal display driving method Expired - Fee Related CN100587785C (en)

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Application Number Priority Date Filing Date Title
CN200610078449A CN100587785C (en) 2006-05-26 2006-05-26 System for displaying image and liquid crystal display driving method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200610078449A CN100587785C (en) 2006-05-26 2006-05-26 System for displaying image and liquid crystal display driving method

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101572046B (en) * 2008-04-29 2012-06-13 龙亭新技股份有限公司 Data driving circuit, display device and control method of display device
TWI456914B (en) * 2010-09-16 2014-10-11 Ind Tech Res Inst Energy detection method and circuit usnig thereof
CN110619834A (en) * 2019-08-20 2019-12-27 深圳市华星光电技术有限公司 Multi-clock potential conversion circuit and multi-clock gate driving circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101572046B (en) * 2008-04-29 2012-06-13 龙亭新技股份有限公司 Data driving circuit, display device and control method of display device
TWI456914B (en) * 2010-09-16 2014-10-11 Ind Tech Res Inst Energy detection method and circuit usnig thereof
CN110619834A (en) * 2019-08-20 2019-12-27 深圳市华星光电技术有限公司 Multi-clock potential conversion circuit and multi-clock gate driving circuit

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