CN105869583A - System and method of using recovered charge to reduce power consumed by digital circuit - Google Patents
System and method of using recovered charge to reduce power consumed by digital circuit Download PDFInfo
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- CN105869583A CN105869583A CN201510027744.7A CN201510027744A CN105869583A CN 105869583 A CN105869583 A CN 105869583A CN 201510027744 A CN201510027744 A CN 201510027744A CN 105869583 A CN105869583 A CN 105869583A
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- switch
- data wire
- charge storage
- electric charge
- storage element
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Abstract
The invention provides a system and a method of using recovered charge to reduce power consumed by a digital circuit. The system comprises at least one source driving circuit for driving a data line; a first switch is connected with the at least one source driving circuit and the data line; a second switch is connected with the data line; and a charge storage assembly is electrically coupled with the second switch for storing the charge of the data line. When the at least one source driving circuit drives the data line according to a pixel signal, a controller turns off the first switch and turns on the second switch, the at least one source driving circuit is made to be electrically connected with the data line; and when the at least one source driving circuit does not drive the data line, the first switch is turned on and the second switch is turned off, the data line and the charge storage assembly are electrically coupled, and the charge storage assembly stores charges of the data line.
Description
Technical field
The present invention relates to electric charge recovery technology field, particularly relate to a kind of utilization and reclaim electric charge
Reduce the system and method for digital circuit power consumption.
Background technology
Liquid crystal display includes a plurality of liquid crystal display (LCD cell) arranged in a matrix fashion.Figure
1 is available liquid crystal unit 110 and liquid crystal display gate drive circuit 120, source electrode drive circuit 130
And the annexation schematic diagram of common voltage drive circuit 140.When described common voltage drive circuit 140
Switch the common electric voltage VCOM of output, or source electrode drive circuit 130 switches output source pole tension
During Vsrc, parasitic capacitance Cp in liquid crystal display 110, storage capacitors Cs, parallel plate capacitor Clcd
Along with being charged or discharging.But, export gate drive signal at gate drive circuit 120 and make liquid crystal
When unit 110 turns on, liquid crystal cells 110 just according to be stored in parasitic capacitance Cp, storage capacitors Cs,
The voltage swing of parallel plate capacitor Clcd and demonstrate the brightness of correspondence.Therefore, on combination of liquid crystals display
A plurality of liquid crystal cells 110 and via RGB filter filter, liquid crystal display just can be formed out not
Picture with color.
But, when the electric charge being stored in parasitic capacitance Cp, storage capacitors Cs, parallel plate capacitor Clcd
After liquid crystal cells 110 has shown, disappearance of just naturally discharging along with discharge path, these electric charges are not
It is fully utilized so that the electric charge service efficiency of liquid crystal display cannot obtain lifting.Fig. 2 is one existing
Having the data wire electric charge schematic diagram of liquid crystal display, wherein remaining on data wire 210 electric charge, source electrode is transported
Calculate the ground that amplifier (source operational amplifier) is typically to simulate remaining charge guiding one
(VSSA), this kind of technology does not make full use of this residual charge.
For this problem, prior art proposes the technology that electric charge reclaims.In U.S. Patent No. 6,778,158
In, it arranges a common electric voltage electric capacity Ccom between common electrical laminate layer (Vcom) and ground connection, in order to return
Receive the electric charge in common electrical laminate layer (Vcom), and the electric charge of described recovery is provided a number of a display floater
According to line, in order to accelerate the speed that data wire is driven.But, the drive circuit of display has many
Switch, when these switch switchings, easily produces many noises and coupled to common electrical laminate layer (Vcom).
When the electric charge of recovery common electrical laminate layer (Vcom), and during driving data line, data wire noise can be made to increase,
And then reduction signal noise ratio, and then the quality of impact display.Therefore, the electric charge of existing display device
Reclaim the space still having improvement.
Summary of the invention
One of the object of the invention essentially consists in offer one utilization recovery electric charge
System and method, its can the electric charge of effective data collection line, to save power consumption, and be provided that low noise
Power supply.
According to one of present invention characteristic, the present invention proposes a kind of utilization and reclaims electric charge to reduce digital circuit consumption
Electricity system, be applied to display floater, described system comprise at least one source electrode drive circuit, first switch,
Second switch, charge storage element, voltage regulator (regulator) and controller.Described at least one source
Pole drive circuit drives the data wire of described display floater.Described first switch be connected to described at least one source
Pole drive circuit and described data wire.Described second switch is connected to described data wire.Described electric charge stores
Second switch described in assembly electrical couplings, in order to store the electric charge of described data wire.Described voltage regulator
Being connected to described charge storage element, to regulate the voltage of described charge storage element, and then it is defeated to produce one
Go out voltage.Described controller is connected to described first switch and described second switch, when described at least one source
When pole drive circuit drives described data wire according to picture element signal, described first switch cuts out and by described
Second switch is opened, and is electrically connected with described data wire with at least one source electrode drive circuit described in allowing, and
When described at least one source electrode drive circuit does not drives described data wire, by described first switch open and incite somebody to action
Described second switch is closed, in order to allow described data wire and described charge storage element electrical couplings, described
Charge storage element stores the electric charge of described data wire, and wherein, described output voltage supplies power to a numeral electricity
Road.
The present invention also propose a kind of utilize recovery electric charge to the method reducing digital circuit power consumption, be applied to show
Show that panel system, wherein said display floater system include that at least one source electrode drive circuit is described aobvious to drive
Show the data wire of panel, the first switch be connected to described at least one source electrode drive circuit and described data wire,
Second switch is connected to described data wire, and second switch described in charge storage element electrical couplings, institute
It is that closed mode, described second switch are as open mode, use that the method for stating comprise (A) to set described first switch
With the described data wire electrical connection by described at least one source electrode drive circuit with described display floater；(B)
According to a picture element signal, in order to described at least one source electrode drive circuit is driven described data wire；(C) set
Described first switch is closed mode for open mode, described second switch, to allow described data wire and institute
Stating charge storage element electrical couplings, described charge storage element stores the electric charge of described data wire；(D)
A pressure adjuster is used to be connected to described charge storage element, in order to regulate the electricity of described charge storage element
Pressure, and then produce an output voltage, wherein, described output voltage supplies power to digital circuit.
Prior art only reclaims the electric charge of common electrical laminate layer (Vcom), but, consequent voltage can be deposited
At many noises, when using voltage produced by the electric charge reclaimed to remove driving data line, data wire can be made
Noise increases and affects the quality of display.The electric charge of data collection line of the present invention, and the electric charge institute that will reclaim
The voltage produced goes to drive digital circuit, not only makes an uproar produced by produced voltage noise relatively prior art
Sound is few, and digital circuit is the most affected by noise unlike available data line simultaneously, and therefore the present invention reclaims
It is a kind of fine application that voltage produced by electric charge goes to drive digital circuit.
Accompanying drawing explanation
Fig. 1 is available liquid crystal unit and the gate drive circuit of liquid crystal display, source electrode drive circuit and public affairs
The annexation schematic diagram of common voltage drive circuit.
Fig. 2 is the data wire electric charge schematic diagram of available liquid crystal display.
Fig. 3 is that the present invention is a kind of utilizes recovery electric charge to reduce the system schematic of digital circuit power consumption.
Fig. 4 is that the present invention is a kind of utilizes recovery electric charge to reduce the system sequence schematic diagram of digital circuit power consumption.
Fig. 5 is that the present invention is a kind of utilizes recovery electric charge to reduce the system emulation schematic diagram of digital circuit power consumption.
Fig. 6 is the simulation schematic diagram of prior art.
Fig. 7 is that the present invention utilizes recovery electric charge to reduce the method flow diagram of digital circuit power consumption
[symbol description]
Liquid crystal cells 110 gate drive circuit 120
Source electrode drive circuit 130 common voltage drive circuit 140
Data wire 210
Electric charge is used to reclaim the system 300 reducing numeral power consumption
Source electrode drive circuit 310 first switch 320
Second switch 330 charge storage element 340
Voltage regulator 350 controller 360
Data wire 370 first pin 380
Second pin 390 digital circuit 400
Step (A)～(D)
Detailed description of the invention
Fig. 3 is that the present invention is a kind of utilizes the schematic diagram reclaiming the system 300 that electric charge reduces digital circuit power consumption.
The described system 300 utilizing recovery electric charge to reduce digital circuit power consumption is applied to display floater.Described system
System 300 comprises at least one source electrode drive circuit the 310, first switch 320, second switch 330, electric charge storage
Deposit assembly 340, voltage regulator (regulator) 350 and controller 360.
Described at least one source electrode drive circuit 310 is in order to drive the data wire 370 of described display floater.In
The present invention only illustrates the source electrode drive circuit 310 of strange channel (odd channel) and even channel (even
Channel) source electrode drive circuit 310.In practical situation, it has up to a hundred the most thousands of source electrodes
Drive circuit 310.Owing to strange channel (odd channel) is identical with the structure of even channel (even channel),
The present invention only describes the situation of strange channel (odd channel).
Described first switch 320 be connected to described at least one source electrode drive circuit 310 and described data wire
370.Described second switch 330 is connected to described data wire 370.Wherein, described first switch 320 and
Described second switch 330 is respectively transistor, and the gate of described transistor is connected to described controller 360,
Described controller 360 controls described first switch 320 and described second switch 330.
Second switch 330 described in described charge storage element 340 electrical couplings, to store described data wire
Electric charge on 370.Specifically, described charge storage element 340 is electric capacity.Described electric capacity can be one
The metal-insulator-metal form electric capacity (metal-insulator-metal capacitor) of one IC interior,
Also can be the independent capacitance at integrated circuit external.
Described voltage regulator (regulator) 350 is connected to described charge storage element 340, to regulate
State the voltage of charge storage element 340, and produce an output voltage Vout.Wherein, described voltage-regulation
Device 350 is low drop out voltage regurator (low dropout regulator).
Described controller 360 is connected to described first switch 320 and described second switch 330, when described
When at least one source electrode drive circuit 310 drives described data wire 370 according to a picture element signal, by described the
One switch 320 closedown and described second switch 330 being opened, with at least one source electrode drive circuit described in allowing
310 are electrically connected with described data wire 370, and carry out known pixel and show.
When described at least one source electrode drive circuit 310 does not drives described data wire 370, by described first
Switch 320 opens and cuts out by described second switch 330, to allow described data wire 370 and described electric charge
Storage assembly 340 electrical couplings, described charge storage element 340 store on described data wire 370
Electric charge.
It is said that in general, the voltage of described charge storage element 340 is about 5 volts (V), described voltage-regulation
Device (regulator) 350 by 5 volts of voltage-regulation to the most relatively low output voltage Vout, such as 3.3 volts,
1.8 volts, 1.1 volts, so that described output voltage Vout is supplied power to a digital circuit 400.It is preferred that
The system 300 that described digital circuit 400 and the present invention utilize recovery electric charge to reduce numeral power consumption is positioned at same
In one integrated circuit.
When described digital circuit 400 and the present invention utilize recovery electric charge to reduce the system 300 of numeral power consumption
It is positioned at same integrated circuit and described electric capacity is when the independent capacitance of described integrated circuit external, institute
State second switch 330 and be electrically coupled to described charge storage element 340, institute via one first pin 380
State voltage regulator 350 and be electrically coupled to described digital circuit 400 via one second pin 390.
Fig. 4 is that the present invention utilizes the time diagram reclaiming the system 300 that electric charge reduces numeral power consumption.
Wherein, the first switch 320 when be high potential (1), represents cut out (close), can allow the first switch 320
Two ends turn on, and when the first switch 320 is electronegative potential (0), represents and open (open), first can be allowed to open
The two ends of pass 320 are not turned on, and form open circuit.As shown in Figure 4, in the display time of a data line,
The first period T1 and the second non-display period T2 of display can be divided into.When in the first period T1,
Described first switch 320 cuts out and is opened by described second switch 330, described at least one source drive electricity
Road 310 is electrically connected with described data wire 370, shows carrying out known pixel.At the second period T2
Time, described controller 360 produces a horizontal-drive signal (Hsync), will export next data with instruction
The data of line, now, described at least one source electrode drive circuit 310 does not drives described data wire 370.Cause
This, described first switch 320 is opened (open) and by described second switch 330 by described controller 360
Close (close), so that described at least one source electrode drive circuit 310 is disconnected with described data wire 370 and
Described data wire 370 is electrically connected with described charge storage element 340, on described data wire 370
Electric charge can store to described charge storage element 340.For avoiding described charge storage element 340 is filled
During electricity, Charge back flow to described at least one source electrode drive circuit 310, described first switch cuts out and described
Second switch is closed as non-overlapping (non-overlap).
Fig. 5 is that the present invention is a kind of utilizes recovery electric charge to reduce the emulation of the system 300 of digital circuit power consumption
Schematic diagram.Fig. 6 is the simulation schematic diagram of prior art.Its analog parameter be VDDA=10V,
VCC=1.8V, described charge storage element 340 (storage_capacitor) are 1uF, on data wire 370
Load be 5k Austria nurse/100pF, central, VDDA be described in the confession of at least one source electrode drive circuit 310
Piezoelectric voltage, VCC is the voltage of described second pin 390, and Vstorage_capacitor is the storage of described electric charge
Depositing the voltage of assembly 340, V_recycle is the voltage of described first pin 380.By Fig. 5 and Fig. 6 institute
Show and understand, when reclaiming the technology of the system 300 that electric charge reduces numeral power consumption when using the present invention to utilize,
The electric current average out to 11.4mA consumed, and the electric current average out to 25.2mA that prior art is consumed.With
Time comparison diagram 5 and Fig. 6 oval A and oval B understand, when using the technology of the present invention, noise can subtract
Reduce a lot.
Fig. 7 is that the present invention utilizes recovery electric charge to reduce the method flow diagram of digital circuit power consumption.Its application
In display floater system 300, as shown in earlier figures 3, described system 300 includes at least one source drive
Circuit 310 with drive the data wire 370, first of described display floater switch 320 be connected to described at least
One source electrode drive circuit 310 and described data wire 370, second switch 330 be connected to described data wire 370,
Described in charge storage element 340 electrical couplings, second switch 330 and a voltage regulator 350 are connected to
Described charge storage element 340.Described method, first in step (A), sets described first switch 320
For closedown (close) state, described second switch 330 for opening (open) state, with by described at least one source
Pole drive circuit 310 is electrically connected with the described data wire 370 of described display floater.
In step (B), according to picture element signal, use described at least one source electrode drive circuit 310 drive institute
State data wire 370, show carrying out known pixel.
In step (C), set described first switch for opening (open) state, described second switch as closing
Close (close) state, to allow described data wire and described charge storage element electrical couplings, in order to by described electricity
Lotus storage assembly stores the electric charge of described online data.
In step (D), use described pressure adjuster 350 to regulate the electricity of described charge storage element 340
Pressure, and produce an output voltage.Wherein, described output voltage system supplies power to a digital circuit 400.
From preceding description, prior art only reclaims the electric charge of common electrical laminate layer (Vcom), but, by
This voltage produced has many noises on it, uses voltage produced by the electric charge reclaimed to go driving data
During line, data wire noise can be made to increase and affect the quality of display.The electric charge of data collection line of the present invention,
And voltage produced by the electric charge of recovery is gone to drive digital circuit, not only produced voltage noise is more existing
Having noise produced by technology few, digital circuit is the most affected by noise unlike available data line simultaneously,
Therefore it is a kind of fine application that voltage produced by the electric charge that the present invention reclaims goes to drive digital circuit.
Although having been described for the preferred embodiment of the application, but those skilled in the art once knowing
Basic creative concept, then can make other change and amendment to these embodiments.So, appended power
Profit requires to be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the application scope.
Obviously, those skilled in the art can carry out various change and modification without deviating from the application to the application
Spirit and scope.So, if the application these amendment and modification belong to the application claim and
Within the scope of its equivalent technologies, then the application is also intended to comprise these change and modification.
Claims (10)
1. utilize recovery electric charge to reduce a system for digital circuit power consumption, be applied to display floater, its
Being characterised by, described system comprises:
At least one source electrode drive circuit, in order to drive the data wire of described display floater；
First switch, be connected to described at least one source electrode drive circuit and described data wire；
Second switch, is connected to described data wire；
Charge storage element, second switch described in electrical couplings, in order to store the electric charge of described data wire；
Voltage regulator, in order to regulate the voltage of described charge storage element, and then produces an output voltage；
And
Controller, is connected to described first switch and described second switch, when described at least one source drive
When circuit drives described data wire according to a picture element signal, described first switch cuts out and by described second
Switch is opened, and is electrically connected with described data wire with at least one source electrode drive circuit described in allowing, and works as institute
State at least one source electrode drive circuit when not driving described data wire, described first switch is opened and by described
Second switch is closed, in order to allow described data wire and described charge storage element electrical couplings, and described electric charge
Storage assembly stores the electric charge of described online data,
Described output voltage supplies power to described digital circuit.
2. the system as claimed in claim 1, it is characterised in that the display time of described data wire is divided into
For the first period of display and for the second non-display period, when the first period, described controller
Described first switch cuts out and opened by described second switch, in order to by described at least one source drive electricity
Road and described data wire are electrically connected, and then carry out pixel and show, and when described second period, institute
State controller by described first switch open and described second switch closed, in order to by described data wire with
Described charge storage element is electrically connected, and then makes the electric charge of described data wire store to the storage of described electric charge
Assembly.
3. the system as claimed in claim 1, it is characterised in that described charge storage element is electric capacity.
4. the system as claimed in claim 1, it is characterised in that described voltage regulator is low pressure drop electricity
Pressure adjuster.
5. the system as claimed in claim 1, it is characterised in that described first switch cuts out and described
Second switch is closed as non-overlapping.
6. system as claimed in claim 5, it is characterised in that described first switch and described second is opened
Pass is all transistor, and the gate of described transistor is respectively connecting to described controller, and described controller is respectively
Control described first switch and described second switch.
7. system as claimed in claim 6, it is characterised in that described second switch is via the first pin
It is electrically coupled to described charge storage element, and described voltage regulator is via the second pin electrical couplings
To described digital circuit.
8. utilize recovery electric charge to the method reducing digital circuit power consumption, be applied to a display floater system
System, wherein said display floater system includes that at least one source electrode drive circuit is to drive described display floater
Data wire, first switch be connected to described at least one source electrode drive circuit and described data wire, second switch
It is connected to described data wire, and second switch, described method described in a charge storage element electrical couplings
Comprise:
(A) set described first switch be closed mode, described second switch as open mode, by described extremely
A few source electrode drive circuit is electrically connected with the described data wire of described display floater；
(B) according to picture element signal, described in order, at least one source electrode drive circuit drives described data wire；
(C) set described first switch be open mode, described second switch as closed mode, make described number
According to line and described charge storage element electrical couplings, described charge storage element stores described online data
Electric charge；And
(D) a pressure adjuster is used to be connected to described charge storage element, in order to regulate described electric charge storage group
The voltage of part, and then produce an output voltage, described output voltage is supplying digital circuits.
9. method as claimed in claim 8, it is characterised in that described first switch cuts out and described
Second switch is closed as non-overlapping.
10. method as claimed in claim 9, it is characterised in that described first switch and described second
Switch is transistor, and the gate of described transistor is respectively connecting to a controller, and described controller controls institute
State the first switch and described second switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510027744.7A CN105869583B (en) | 2015-01-20 | 2015-01-20 | The system and method for digital circuit power consumption is reduced using charge is recycled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510027744.7A CN105869583B (en) | 2015-01-20 | 2015-01-20 | The system and method for digital circuit power consumption is reduced using charge is recycled |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105869583A true CN105869583A (en) | 2016-08-17 |
| CN105869583B CN105869583B (en) | 2018-06-12 |
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| CN105869583B (en) | 2018-06-12 |
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Address after: China Taiwan Hsinchu Science Park Hsinchu city Dusing Road No. 6 4 floor and 6 floor Applicant after: FOCALTECH SYSTEMS LIMITED Address before: Hsinchu Science Park, Taiwan, Taiwan, China Applicant before: Xuyao Science and Technology Co., Ltd. |
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