CN105869583B - The system and method for digital circuit power consumption is reduced using charge is recycled - Google Patents
The system and method for digital circuit power consumption is reduced using charge is recycled Download PDFInfo
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- CN105869583B CN105869583B CN201510027744.7A CN201510027744A CN105869583B CN 105869583 B CN105869583 B CN 105869583B CN 201510027744 A CN201510027744 A CN 201510027744A CN 105869583 B CN105869583 B CN 105869583B
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Abstract
Present invention proposition is a kind of to reduce the system and method for digital circuit power consumption using charge is recycled, including an at least source electrode drive circuit to driving data line, first switch is connected at least a source electrode drive circuit and data line, second switch is connected to the data line, and second switch described in charge storage element electrical couplings, to store the charge of the data line.When an at least source electrode drive circuit drives the data line according to a picture element signal, first switch is closed and opens second switch by controller, an at least source electrode drive circuit to be allowed to be electrically connected with data line, and when the non-driving data line of an at least source electrode drive circuit, first switch is opened and closes second switch, to allow data line and charge storage element electrical couplings, charge storage element stores the charge of data line.
Description
Technical field
The present invention relates to charge recovery technology field more particularly to a kind of reduce digital circuit power consumption using charge is recycled
System and method.
Background technology
Liquid crystal display includes a plurality of liquid crystal displays (LCD cell) arranged in a matrix fashion.Fig. 1 is existing
There are liquid crystal cells 110 and liquid crystal display gate drive circuit 120, source electrode drive circuit 130 and common voltage drive circuit 140
Connection relationship diagram.When the common voltage VCOM or source electrode of the common voltage drive circuit 140 switching output drive
It is parasitic capacitance Cp, storage capacitors Cs in liquid crystal display 110, parallel during the dynamic switching of circuit 130 output source voltage Vsrc
Plate capacitance Clcd is with progress charge or discharge.However, exporting gate drive signal in gate drive circuit 120 makes liquid crystal cells
During 110 conducting, liquid crystal cells 110 are just big according to parasitic capacitance Cp, storage capacitors Cs, the voltage of parallel plate capacitor Clcd is stored in
It is small and show corresponding brightness.Therefore, a plurality of liquid crystal cells 110 on combination of liquid crystals display and via RGB filter
It filters, liquid crystal display can form out the picture of different color.
However, when the charge being stored in parasitic capacitance Cp, storage capacitors Cs, parallel plate capacitor Clcd is in liquid crystal cells
After the completion of 110 displays, just as discharge path discharges disappearance naturally, these charges are not fully utilized so that liquid crystal
Showing the charge service efficiency of device can not be promoted.Fig. 2 is the data line charge schematic diagram of an available liquid crystal display, wherein counting
According to charge remaining on line 210, source electrode operational amplifier (source operational amplifier) is typically will be remaining
The ground (VSSA) simulated of charge guiding one, such technology do not make full use of this residual charge.
For this problem, the prior art proposes the technology of charge recycling.In U.S. Patent No. 6,778,158, in public affairs
A common voltage capacitance Ccom is set between common-battery laminate layer (Vcom) and ground connection, to recycle the electricity in common electrical laminate layer (Vcom)
Lotus, and the charge of the recycling is provided to a data line of a display panel, to accelerate the speed driven to data line.So
And in many of the driving circuit of display switch, when these switchings, easily generate many noises and be coupled to
Common electrical laminate layer (Vcom).When the charge of recycling common electrical laminate layer (Vcom), and during driving data line, it can cause data line noise
It increases, and then reduces signal noise ratio, and then influence the quality of display.Therefore, the charge recycling of existing display equipment still has
Improved space.
Invention content
One of the object of the invention essentially consists in offer one reduces the system of digital circuit power consumption and side using charge is recycled
Method, can effective data collection line charge, to save power consumption, and the power supply of low noise can be provided.
One of according to the present invention characteristic, the present invention propose a kind of be reduce digital circuit power consumption using recycling charge
System, applied to display panel, the system includes an at least source electrode drive circuit, first switch, second switch, charge storage group
Part, voltage regulator (regulator) and controller.An at least source electrode drive circuit drives the number of the display panel
According to line.The first switch is connected to an at least source electrode drive circuit and the data line.The second switch is connected to
The data line.Second switch described in the charge storage element electrical couplings, to store the charge of the data line.It is described
Voltage regulator is connected to the charge storage element, to adjust the voltage of the charge storage element, and then generates an output
Voltage.The controller is connected to the first switch and the second switch, when an at least source electrode drive circuit foundation
When picture element signal drives the data line, the first switch is closed and opens the second switch, with allow it is described at least
One source electrode drive circuit is electrically connected with the data line and when an at least source electrode drive circuit does not drive the data
During line, the first switch is opened and closes the second switch, to allow the data line and the charge storage group
Part electrical couplings, the charge storage element store the charge of the data line, wherein, the output voltage supplies power to a number
Circuit.
The present invention also propose it is a kind of reduce the method for digital circuit power consumption using charge is recycled, applied to display panel system
System, wherein the display panel system includes an at least source electrode drive circuit to drive the data line of the display panel, first
Switch is connected to an at least source electrode drive circuit and the data line, second switch are connected to the data line, Yi Ji electricity
Second switch described in lotus storage assembly electrical couplings, the method include (A) setting first switch and are in off state, are described
Second switch is in an open state, to the data line of an at least source electrode drive circuit and the display panel is electrical
Connection；(B) according to a picture element signal, the data line is driven to an at least source electrode drive circuit by described in；(C) described in setting
First switch is in an open state, the second switch is in off state, to make the data line electric with the charge storage element
Gas couples, and the charge storage element stores the charge of the data line；(D) charge is connected to using a pressure adjuster to store up
Component is deposited, to adjust the voltage of the charge storage element, and then generates an output voltage, wherein, the output voltage supplies
Electricity is to digital circuit.
The prior art only recycles the charge of common electrical laminate layer (Vcom), however, resulting voltage can there are many to make an uproar
Sound when removing driving data line using voltage caused by the charge of recycling, can cause data line noise to increase and influence display
Quality.The charge of data collection line of the present invention, and voltage caused by the charge of recycling is gone into driving digital circuit, not only produced
Raw voltage noise is few compared with noise caused by the prior art, at the same digital circuit unlike available data line easily by noise shadow
It rings, therefore it is a kind of fine application that voltage caused by the charge of the invention recycled, which goes driving digital circuit,.
Description of the drawings
Fig. 1 is that the gate drive circuit, source electrode drive circuit and common voltage of available liquid crystal unit and liquid crystal display drive
The connection relationship diagram of dynamic circuit.
Fig. 2 is the data line charge schematic diagram of available liquid crystal display.
Fig. 3 is that the present invention is a kind of reduces the system schematic of digital circuit power consumption using charge is recycled.
Fig. 4 is that the present invention is a kind of reduces the system sequence schematic diagram of digital circuit power consumption using charge is recycled.
Fig. 5 is that the present invention is a kind of reduces the system emulation schematic diagram of digital circuit power consumption using charge is recycled.
Fig. 6 is the simulation schematic diagram of the prior art.
Fig. 7 reduces the method flow diagram of digital circuit power consumption for the present invention using charge is recycled
【Symbol description】
110 gate drive circuit 120 of liquid crystal cells
130 common voltage drive circuit 140 of source electrode drive circuit
Data line 210
The system 300 of digital power consumption is reduced using charge recycling
310 first switch 320 of source electrode drive circuit
330 charge storage element 340 of second switch
350 controller 360 of voltage regulator
370 first pin 380 of data line
Second pin, 390 digital circuit 400
Step (A)~(D)
Specific embodiment
Fig. 3 is a kind of schematic diagram for reducing the system 300 of digital circuit power consumption using charge is recycled of the present invention.The utilization
Recycling charge is applied to display panel to reduce the system 300 of digital circuit power consumption.The system 300 is driven comprising an at least source electrode
Dynamic circuit 310, first switch 320, second switch 330, charge storage element 340, voltage regulator (regulator) 350 and
Controller 360.
An at least source electrode drive circuit 310 is driving the data line 370 of the display panel.In the present invention only
It is painted the source electrode drive circuit 310 of strange channel (odd channel) and the source electrode drive circuit of even channel (even channel)
310.In practical situation, with up to a hundred or even thousands of a source electrode drive circuits 310.Due to strange channel (odd
Channel) identical with the structure of even channel (even channel), the present invention only describes the feelings of strange channel (odd channel)
Shape.
The first switch 320 is connected at least a source electrode drive circuit 310 and the data line 370.Described
Two switches 330 are connected to the data line 370.Wherein, the first switch 320 and the second switch 330 are respectively crystal
Pipe, the gate of the transistor are connected to the controller 360, and the controller 360 controls the first switch 320 and described
Second switch 330.
Second switch 330 described in 340 electrical couplings of charge storage element, to store the electricity on the data line 370
Lotus.Specifically, the charge storage element 340 is capacitance.The capacitance can be one an IC interior metal-insulator
Layer-metallic forms capacitance (metal-insulator-metal capacitor) also can be the independent electrical in integrated circuit external
Hold.
The voltage regulator (regulator) 350 is connected to the charge storage element 340, to adjust the charge
The voltage of storage assembly 340, and generate an output voltage Vout.Wherein, the voltage regulator 350 is adjusted for low drop-out voltage
Device (low dropout regulator).
The controller 360 is connected to the first switch 320 and the second switch 330, when an at least source electrode
When driving circuit 310 drives the data line 370 according to a picture element signal, the first switch 320 is closed and by described the
Two switches 330 are opened, an at least source electrode drive circuit 310 to be allowed to be electrically connected with the data line 370, and known to carrying out
Pixel show.
When it is described at least a source electrode drive circuit 310 does not drive the data line 370 when, the first switch 320 is beaten
It opens and closes the second switch 330, it is described to allow the data line 370 and 340 electrical couplings of charge storage element
Charge storage element 340 stores the charge on the data line 370.
In general, the voltage of the charge storage element 340 is about 5 volts (V), the voltage regulator
(regulator) 350 5 volts of voltages are adjusted to relatively low output voltage Vout, such as 3.3 volts, 1.8 volts, 1.1 volts
The output voltage Vout is supplied power to a digital circuit 400 by spy.Preferably, the digital circuit 400 is utilized with the present invention
Recycling charge is located to reduce the system 300 of digital power consumption in same integrated circuit.
When the digital circuit 400 reduces the system 300 of digital power consumption using charge is recycled positioned at same with the present invention
Integrated circuit and the capacitance are in the independent capacitance of the integrated circuit external, and the second switch 330 is via one the
One pin 380 is electrically coupled to the charge storage element 340, and the voltage regulator 350 is electrical via one second pin 390
Coupled to the digital circuit 400.
Fig. 4 is the time diagram for the system 300 that the present invention reduces digital power consumption using charge is recycled.Wherein, first
Switch 320 be high potential (1) when, represent close (close), can allow first switch 320 both ends be connected and first switch
320 be low potential (0) when, represent open (open), the both ends of first switch 320 can be allowed to be not turned on, formed open circuit.Such as Fig. 4 institutes
Show, 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
During one period T1, the first switch 320 closes and opens the second switch 330, an at least source electrode drive circuit
310 are electrically connected with the data line 370, are shown with pixel known to progress.In the second period T2, the controller 360
A horizontal synchronizing signal (Hsync) is generated, to indicate the data that will export next data line, at this point, an at least source electrode
Driving circuit 310 does not drive the data line 370.Therefore, the controller 360 opens the first switch 320 (open)
And the second switch 330 is closed into (close), an at least source electrode drive circuit 310 is broken with the data line 370
It opens and is electrically connected the data line 370 and the charge storage element 340, the charge on the data line 370 can store up
It deposits to the charge storage element 340.During to avoid charging to the charge storage element 340, Charge back flow to it is described at least
One source electrode drive circuit 310, the first switch is closed and the second switch is closed as non-overlapping (non-overlap).
Fig. 5 is that the present invention is a kind of reduces the emulation schematic diagram of the system 300 of digital circuit power consumption using charge is recycled.Figure
6 be the simulation schematic diagram of the prior art.Its analog parameter is VDDA=10V, VCC=1.8V, the charge storage element 340
(storage_capacitor) be 1uF, the load on data line 370 is 5k Austria nurse/100pF, in the middle, VDDA for it is described at least
The supply voltage of one source electrode drive circuit 310, VCC are the voltage of second pin 390, and Vstorage_capacitor is institute
The voltage of charge storage element 340 is stated, V_recycle is the voltage of first pin 380.As shown in Fig. 5 and Fig. 6 it is found that
When reducing using charge is recycled the technology of system 300 of digital power consumption using the present invention, the electric current average out to that is consumed
11.4mA, and the electric current average out to 25.2mA that the prior art is consumed.Simultaneously compare Fig. 5 and Fig. 6 oval A and ellipse B it is found that
When using the technology of the present invention, noise can reduce many.
Fig. 7 reduces the method flow diagram of digital circuit power consumption for the present invention using charge is recycled.It is applied to display surface
Plate system 300, as shown in earlier figures 3, the system 300 includes an at least source electrode drive circuit 310 to drive the display surface
The data line 370 of plate, first switch 320 are connected to an at least source electrode drive circuit 310 and the data line 370, second
Switch 330 is connected to the data line 370,330 and one voltage tune of second switch described in 340 electrical couplings of charge storage element
Section device 350 is connected to the charge storage element 340.The method sets the first switch 320 first in step (A)
It is to open (open) state for closing (close) state, the second switch 330, an at least source electrode drive circuit by described in
310 are electrically connected with the data line 370 of the display panel.
In step (B), according to picture element signal, the data line is driven using an at least source electrode drive circuit 310
370, it is shown with pixel known to progress.
In step (C), it be closing to set the first switch to open (open) state, the second switch
(close) state to allow the data line and the charge storage element electrical couplings, is stored in order to by the charge storage element
The charge of the online data.
In step (D), using the pressure adjuster 350 to adjust the voltage of the charge storage element 340, and generate
One output voltage.Wherein, the output voltage system supplies power to a digital circuit 400.
By preceding description it is found that the prior art only recycles the charge of common electrical laminate layer (Vcom), however, resulting electricity
Pressure when removing driving data line using voltage caused by the charge of recycling, can cause data line noise there are many noise thereon
Increase and influence the quality of display.The charge of data collection line of the present invention, and voltage caused by the charge of recycling is gone to drive
Digital circuit, not only generated voltage noise is few compared with noise caused by the prior art, while digital circuit is unlike existing number
It is generally easily affected by noise according to line, therefore it is a kind of fine that voltage caused by the charge of the invention recycled, which goes driving digital circuit,
Application.
Although the preferred embodiment of the application has been described, those skilled in the art once know basic creation
Property concept, then additional changes and modifications may be made to these embodiments.So appended claims be intended to be construed to include it is excellent
It selects embodiment and falls into all change and modification of the application range.Obviously, those skilled in the art can be to the application
Various modification and variations are carried out without departing from spirit and scope.If in this way, these modifications and variations of the application
Belong within the scope of the application claim and its equivalent technologies, then the application is also intended to exist comprising these modification and variations
It is interior.
Claims (10)
1. a kind of reduce the system of digital circuit power consumption using charge is recycled, applied to display panel, which is characterized in that described
System includes：
An at least source electrode drive circuit, to drive the data line of the display panel；
First switch is connected to an at least source electrode drive circuit and the data line；
Second switch is connected to the data line；
Charge storage element, second switch described in electrical couplings, to store the charge of the data line；
Voltage regulator to adjust the voltage of the charge storage element, and then generates an output voltage；And
Controller is connected to the first switch and the second switch, when an at least source electrode drive circuit is according to a picture
When plain signal drives the data line, the first switch is closed and opens the second switch, to allow described at least one
Source electrode drive circuit is electrically connected with the data line and when an at least source electrode drive circuit does not drive the data line
When, the first switch is opened and closes the second switch, to allow the data line and the charge storage element
Electrical couplings, the charge storage element store the charge of the data line,
The output voltage supplies power to the digital circuit.
2. the system as claimed in claim 1, which is characterized in that the display time of the data line is divided into first for display
Period and for the second non-display period, in the first period, the controller by the first switch close and will described in
Second switch is opened, and is electrically connected to an at least source electrode drive circuit by described in the data line, and then carry out pixel and show
To show and in second period, the first switch is opened and closes the second switch by the controller, to
The data line and the charge storage element are electrically connected, and then the charge of the data line is enabled to store to the charge and is stored up
Deposit component.
3. the system as claimed in claim 1, which is characterized in that the charge storage element is capacitance.
4. the system as claimed in claim 1, which is characterized in that the voltage regulator is low drop out voltage regurator.
5. the system as claimed in claim 1, which is characterized in that the first switch is closed and second switch closing is
Non-overlapping.
6. system as claimed in claim 5, which is characterized in that the first switch and the second switch are all transistor,
The gate of the transistor is respectively connected to the controller, and the controller controls the first switch and described second respectively
Switch.
7. system as claimed in claim 6, which is characterized in that the second switch is electrically coupled to described via the first pin
Charge storage element and the voltage regulator are electrically coupled to the digital circuit via the second pin.
8. a kind of reduce the method for digital circuit power consumption using charge is recycled, applied to a display panel system, wherein described
Display panel system includes an at least source electrode drive circuit so that the data line of the display panel, first switch to be driven to be connected to institute
It states an at least source electrode drive circuit and the data line, second switch is connected to the data line and a charge storage element
Second switch described in electrical couplings, the method include：
(A) the setting first switch is in off state, the second switch is in an open state, an at least source drive by described in
The data line of circuit and the display panel is electrically connected；
(B) according to picture element signal, an at least source electrode drive circuit drives the data line described in order；
(C) the setting first switch is in an open state, the second switch is in off state, and enables the data line and the electricity
Lotus storage assembly electrical couplings, the charge storage element store the charge of the online data；And
(D) charge storage element is connected to using a voltage regulator, to adjust the voltage of the charge storage element,
And then an output voltage is generated, the output voltage is supplying digital circuits.
9. method as claimed in claim 8, which is characterized in that the first switch is closed and second switch closing is
Non-overlapping.
10. method as claimed in claim 9, which is characterized in that the first switch and the second switch are transistor, institute
The gate for stating transistor is respectively connected to a controller, and the controller controls the first switch and the second switch.
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