CN108877705A - A kind of public voltage generating circuit, source electrode drive circuit and liquid crystal display device - Google Patents
A kind of public voltage generating circuit, source electrode drive circuit and liquid crystal display device Download PDFInfo
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- CN108877705A CN108877705A CN201810574958.XA CN201810574958A CN108877705A CN 108877705 A CN108877705 A CN 108877705A CN 201810574958 A CN201810574958 A CN 201810574958A CN 108877705 A CN108877705 A CN 108877705A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3614—Control of polarity reversal in general
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The present invention provides a kind of public voltage generating circuit, the public voltage generating circuit receives the first common voltage and the second common voltage, and according to polarity reverse control signal, the first opposite exchange common voltage of output polarity exchanges common voltage with second, and first exchange common voltage or second exchange common voltage it is consistent with the polarity for the data-signal that source electrode drive circuit exports on corresponding data line, and data-signal and with the consistent common voltage collective effect that exchanges of data-signal polarity in the same pixel unit of display panel.The present invention also provides a kind of source electrode drive circuits.The present invention also provides a kind of liquid crystal display devices.Public voltage generating circuit, source electrode drive circuit and liquid crystal display device of the invention, the polarity for the data-signal that first exchange common voltage or the second exchange common voltage and source electrode drive circuit are exported on pieces of data line is consistent, so as to avoid the generation of the inverse phenomenon on liquid crystal display panel.
Description
Technical field
The present invention relates to field of liquid crystal display more particularly to a kind of public voltage generating circuits, source electrode drive circuit and liquid
Crystal device.
Background technique
Liquid crystal display (Liquid Crystal Display, LCD) has many advantages, such as frivolous, energy saving, radiationless,
Therefore traditional cathode-ray tube (CRT) display has been gradually replaced.Liquid crystal display is widely used in high definition at present
The electronics such as clear DTV, desktop computer, personal digital assistant (PDA), laptop, mobile phone, digital camera are set
In standby.
Currently, liquid crystal display includes that wide viewing angle shows mould in order to meet people to the various needs of liquid crystal display performance
The display patterns such as formula, narrow viewing angle display pattern, for example, liquid crystal display needs to be adjusted to narrow view under the occasion for needing peep-proof
Angle mould formula.And the common voltage applied on the public electrode of different display modes is not exactly the same, which can be divided into
Direct current common voltage (DCVCOM) with exchange common voltage (ACVCOM), and when under narrow viewing angle mode, apply on public electrode
Common voltage be exchange common voltage (ACVCOM).
However, the exchange common voltage (ACVCOM) applied on public electrode needs and source electrode drive circuit is in corresponding data
The polarity of the data-signal exported on line is consistent, that is, is kept fixed polar relationship, otherwise will appear on liquid crystal display panel
Inverse phenomenon.But the prior art can only can just keep the fixed polarity relationship when liquid crystal display panel normally powers on, and
It can not set, therefore breath screen will appear inverse phenomenon when extending screen.
Summary of the invention
In view of this, it is an object of that present invention to provide a kind of public voltage generating circuit, source electrode drive circuit and liquid crystals
Showing device is able to solve on liquid crystal display panel and the problem of inverse phenomenon occurs.
Specifically, the present invention provides a kind of public voltage generating circuit, including public voltage generating circuit, the common electrical
It presses generation circuit to receive the first common voltage and the second common voltage, and control is inverted according to the polarity of source electrode drive circuit output
Signal, the first opposite exchange common voltage of output polarity exchange common voltage, and the first exchange common voltage with second
Or it is described second exchange common voltage it is consistent with the polarity for the data-signal that source electrode drive circuit exports on corresponding data line, and
The data-signal and with the consistent common voltage collective effect that exchanges of the data-signal polarity in the same picture of display panel
Plain unit.
Preferably, the polarity reverse control signal from the source electrode drive circuit data decoder or come from
In sequential control circuit.
Preferably, as each polarity of the polarity reverse control signal inverts, the first exchange common voltage
Voltage becomes second common voltage from first common voltage or becomes described first from second common voltage
Common voltage.
Preferably, the public voltage generating circuit includes first switching element, second switch element, third switch member
Part, the 4th switch element and the first negater.The first switching element includes the first control terminal, the first path terminal and second
First control terminal of path terminal, the first switching element receives the polarity reverse control signal, the first switching element
Alternate path end receive second common voltage.The second switch element include the second control terminal, third path end and
Fourth passage end, the second control terminal of the second switch element receive the polarity reversion letter of the polarity reverse control signal
Number, the fourth passage end of the second switch element receives second common voltage.The third switch element includes third
Control terminal, fifth passage end and the 6th path terminal, the third control terminal of the third switch element and the second switch element
Third path end be connected, the fifth passage end of the third switch element receives first common voltage, and the third is opened
The 6th path terminal for closing element is connected with the first path terminal of the first switching element.4th switch element includes the 4th
Control terminal, the 7th path terminal and the 8th path terminal, the 4th control terminal and the first switching element of the 4th switch element
The first path terminal be connected, the 7th path terminal of the 4th switch element receives second common voltage, and the described 4th opens
The 8th path terminal for closing element is connected with the third path end of the second switch element, also exports the first exchange common electrical
Pressure.First negater includes input terminal and output end, and the input terminal of first negater and the described 4th switch
8th path terminal of element is connected, the output end output of first negater the second exchange common voltage.
Preferably, the first switching element and the second switch element are NMOS tubes, the third switch element and
4th switch element is PMOS tube.
Preferably, the public voltage generating circuit includes the second negater, and second negater includes input
The input terminal of end and output end, second negater receives the polarity reverse control signal, second negater
Output end be connected with the second control terminal of the second switch element.
Preferably, the first exchange common voltage and the source electrode drive circuit export on the data line of odd column
The polarity of data-signal is consistent, and the second exchange common voltage and the source electrode drive circuit are defeated on the data line of even column
The polarity of data-signal out is consistent.
Preferably, the first exchange common voltage and the source electrode drive circuit export on the data line of odd column
The polarity of data-signal is consistent, and the first exchange common voltage is also with the source electrode drive circuit on the data line of even column
The polarity of the data-signal of output is consistent.
The present invention also provides a kind of source electrode drive circuit, source electrode drive circuit includes above-mentioned public voltage generating circuit.
The present invention also provides a kind of liquid crystal display device, liquid crystal display device includes above-mentioned public voltage generating circuit.
Public voltage generating circuit, source electrode drive circuit and liquid crystal display device of the invention, is generated by common voltage
Circuit receives the first common voltage and the second common voltage, and according to polarity reverse control signal, output polarity it is opposite first
It exchanges common voltage and exchanges common voltage with second, allow first to exchange common voltage or the second exchange common voltage and source
The polarity for the data-signal that pole driving circuit exports on pieces of data line is consistent, so as to avoid on liquid crystal display panel
Inverse phenomenon generation.
For above and other objects, features and advantages of the invention can be clearer and more comprehensible, preferred embodiment is cited below particularly,
And cooperate institute's accompanying drawings, it is described in detail below.
Detailed description of the invention
Fig. 1 is the connection schematic diagram of the public voltage generating circuit of an embodiment.
Fig. 2 is the circuit connection diagram of the public voltage generating circuit of an embodiment.
Fig. 3 is the waveform correlation figure of the output voltage of the public voltage generating circuit of an embodiment.
Fig. 4 is the waveform correlation figure of the output voltage of the public voltage generating circuit of an embodiment.
Specific embodiment
Further to illustrate that the present invention is the technical means and efficacy realizing expected purpose and being taken, below in conjunction with attached drawing
And preferred embodiment, to public voltage generating circuit proposed according to the present invention, source electrode drive circuit and liquid crystal display device
Specific embodiment, method, step, structure, feature and effect, detailed description is as follows.
For the present invention aforementioned and other technology contents, feature and effect refer to the preferable reality of schema in following cooperation
Applying in the detailed description of example to be clearly presented.By the explanation of specific embodiment, when expection can be reached to the present invention
The technical means and efficacy that purpose is taken be able to more deeply and it is specific understand, however institute's accompanying drawings be only to provide with reference to
Purposes of discussion is not intended to limit the present invention.
First embodiment
Referring to FIG. 1, Fig. 1 is the connection schematic diagram of the public voltage generating circuit of an embodiment.As shown in Figure 1, this reality
The public voltage generating circuit of example, including public voltage generating circuit 100 are applied, it is public that public voltage generating circuit 100 receives first
Common voltage VCOM1 and the second common voltage VCOM2, and the polarity reverse control signal exported according to source electrode drive circuit 200
POL, output polarity the first opposite exchange common voltage ACVCOM1 and the second exchange common voltage ACVCOM2, and the first exchange
What the exchange common voltage ACVCOM2 of common voltage ACVCOM1 or second and source electrode drive circuit 200 exported on corresponding data line
The polarity of data-signal (S1 in Fig. 1, S2...Sn) is consistent, and data-signal and with data-signal polarity is consistent exchanges public affairs
Common voltage collective effect is in the same pixel unit of display panel 300.
Specifically, the public voltage generating circuit of the present embodiment includes public voltage generating circuit 100, and common voltage generates
Circuit 100 receives the first common voltage VCOM1 and the second common voltage VCOM2, and according to polarity reverse control signal POL, defeated
Opposite polarity first exchange common voltage ACVCOM1 and the second exchange common voltage ACVCOM2 out, wherein polarity reversion control
Signal POL processed ensure that source electrode drive circuit 200 the data-signal exported on pieces of data line polarity transformation when, first
It exchanges the exchange of common voltage ACVCOM1 and second common voltage ACVCOM2 and is also carrying out polar transformation simultaneously, then make first
Exchanging the exchange of common voltage ACVCOM1 or second common voltage ACVCOM2 can be with source electrode drive circuit 200 in pieces of data line
The polarity of the data-signal (S1 in Fig. 1, S2...Sn) of upper output is consistent, such as can make the first exchange common voltage
The polarity of the data-signal (S1, S3...) of the data line of ACVCOM1 and odd column output is consistent, and keeps the second exchange public
The polarity of the data-signal (S2, S4...) of the data line of voltage ACVCOM2 and even column output is consistent, thus odd column
Data line output data-signal (S1, S3...) be positive signal, even column data line output data-signal (S2,
It S4...) is minus polarity signal, correspondingly, first exchanges common voltage ACVCOM1 output cathode signal, and the second exchange is public
Voltage ACVCOM2 output negative pole signal；Polarity reverse control signal POL carries out low and high level transformation, so that defeated on data line
Data-signal out carries out polarity reversion, but also the first exchange common voltage ACVCOM1 and the second exchange common voltage
ACVCOM2 is carrying out polarity reversion simultaneously, so that the data-signal (S1, S3...) that the data line of odd column exports becomes cathode
Property signal, the data-signal (S2, S4...) of the data line output of even column becomes positive signal, and correspondingly, the first exchange is public
Common voltage ACVCOM1 output negative pole signal, the second exchange common voltage ACVCOM2 output cathode signal.To data line
The data-signal of output exchanges the exchange of common voltage ACVCOM1 or second common voltage ACVCOM2 with first and still keeps identical
Polarity.Similarly, when polarity reverse control signal POL carries out low and high level transformation again, data line output data-signal with
First exchange common voltage ACVCOM1 or the second exchange common voltage ACVCOM2 still keep identical polarity.Wherein, data
Signal and with the consistent common voltage collective effect that exchanges of data-signal polarity in the same pixel unit of display panel 300, example
The data-signal (S1, S3...) exported such as the data line of odd column exchanges common voltage ACVCOM1 collective effect in aobvious with first
Show that the same pixel unit of panel, the data-signal (S2, S4...) of the data line output of even column exchange common voltage with second
ACVCOM2 collective effect is in the same pixel unit of display panel.Therefore, apply on public electrode corresponding with pixel unit
The polarity for the data-signal that exchange common voltage exports in respective data lines with source electrode drive circuit 200 is consistent, thus
Avoid the generation of the inverse phenomenon on liquid crystal display panel 300.
Wherein, public electrode corresponding with all pixels unit that a data line is connected can be same, this is public
The the first exchange common voltage ACVCOM1 or the second exchange common voltage of the data line polarity identical polar are received on electrode
ACVCOM2, the connection line for receiving signal can be obtained by etch process.
In one embodiment, polarity reverse control signal POL can with but be not limited to from source electrode drive circuit 200
Data decoder or from sequential control circuit.Wherein, the data decoder of source electrode drive circuit 200 can be used for connecing
Receive and dispatch the data-signal for being sent to source electrode drive circuit 200, and decode polarity reverse control signal POL, viewdata signal etc.
Signal.
The present invention does not limit the voltage of the exchange of the first exchange common voltage ACVCOM1 or second common voltage ACVCOM2
Specific waveform, those skilled in the art can be according to display patterns, by received first common voltage VCOM1 and the second common electrical
Pressure VCOM2 is converted into corresponding first exchange common voltage ACVCOM1 or the second common voltage VCOM2.In one embodiment, with
Each polarity reversion of polarity reverse control signal POL, the voltage of the first exchange common voltage ACVCOM1 is from the first common electrical
Pressure VCOM1 becomes the second common voltage VCOM2 or becomes the first common voltage VCOM1 from the second common voltage VCOM2.
The public voltage generating circuit of the present embodiment receives the first common voltage by public voltage generating circuit 100
VCOM1 and the second common voltage VCOM2, and according to polarity reverse control signal POL, the first opposite exchange of output polarity is public
The exchange common voltage ACVCOM2 of voltage ACVCOM1 and second, so that the first exchange common voltage ACVCOM1 or the second exchange are public
The polarity for the data-signal that common voltage ACVCOM2 can be exported on pieces of data line with source electrode drive circuit 200 is consistent,
So as to avoid the generation of the inverse phenomenon on liquid crystal display panel 300.
Second embodiment
Fig. 2 is the circuit connection diagram of the public voltage generating circuit of an embodiment.As shown in Fig. 2, present embodiments providing
A kind of physical circuit connection of public voltage generating circuit 100 in public voltage generating circuit.Public voltage generating circuit 100 wraps
Include first switching element T1, second switch element T2, third switch element T3, the 4th switch element T4 and the first negater
101.First switching element T1 include the first control terminal, the first path terminal and alternate path end, the first of first switching element T1
The alternate path end of control terminal receiving polarity reverse control signal POL, first switching element T1 receive the second common voltage
VCOM2.Second switch element T2 includes the second control terminal, third path end and fourth passage end, and the of second switch element T2
The fourth passage end of the polarity reversal signal of two control terminal receiving polarity reverse control signal POL, second switch element T2 receives
Second common voltage VCOM2.Third switch element T3 includes that third control terminal, fifth passage end and the 6th path terminal, third are opened
The third control terminal for closing element T3 is connected with the third path end of second switch element T2, the fifth passage of third switch element T3
End receives the first common voltage VCOM1, the 6th path terminal of third switch element T3 and the first access of first switching element T1
End is connected.4th switch element T4 includes the 4th control terminal, the 7th path terminal and the 8th path terminal, and the of the 4th switch element T4
Four control terminals are connected with the first path terminal of first switching element T1, and it is public that the 7th path terminal of the 4th switch element T4 receives second
Common voltage VCOM2, the 8th path terminal of the 4th switch element T4 are connected with the third path end of second switch element T2, also export
First exchange common voltage ACVCOM1.First negater 101 include input terminal and output end, the first negater 101 it is defeated
Enter end to be connected with the 8th path terminal of the 4th switch element T4, the second exchange of output end output of the first negater 101 is public
Voltage ACVCOM2.
In one embodiment, first switching element T1 and second switch element T2 can with but be not limited to be NMOS tube, example
Such as or NPN type triode；Third switch element T3 and the 4th switch element T4 can with but be not limited to be PMOS
Pipe, such as or PNP type triode etc..
In one embodiment, public voltage generating circuit 100 includes the second negater, and the second negater includes input
End and output end, the input terminal receiving polarity reverse control signal POL of the second negater, the output end of the second negater with
The second control terminal of second switch element T2 is connected.
Specifically, the second common voltage VCOM2 is the cut-in voltage lower than third switch element T3, the 4th switch element T4
Low-voltage, i.e. when the third control terminal of third switch element T3 receives the second common voltage VCOM2, third switch element T3 is led
Logical, fifth passage end and the conducting of the 6th path terminal, the 4th control terminal of the 4th switch element T4 receive the second common voltage
When VCOM2, the 4th switch element T4 conducting, the 7th path terminal and the 8th path terminal are connected.Polarity reverse control signal POL is
When high level, it is high level that the first control terminal of first switching element T1, which receives the polarity reverse control signal POL, so that first
Switch element T1 conducting, so that the first path terminal of first switching element T1 receives second by the first switching element T1 of conducting
Common voltage VCOM2 is low level, and the 4th control of the first path terminal of first switching element T1 and the 4th switch element T4
End is connected, then the 4th control terminal of the 4th switch element T4 receives low level and the 4th switch element T4 is connected, then the 4th opens
It is high level that the 8th path terminal for closing element T4, which receives the first common voltage VCOM1 by the 4th switch element T4 of conducting, therefore
First exchange common voltage ACVCOM1 of the 8th path terminal output of the 4th switch element T4 is the first common voltage VCOM1's
High level signal.At this point, the polarity of the second control terminal receiving polarity reverse control signal POL of second switch element T2 inverts letter
Number i.e. low level signal so that second switch element T2 disconnect；The 8th path terminal of 4th switch element T4 is also switched with third
The third control terminal of element T3 is connected, then the third control terminal of third switch element T3 receives high level and makes third switch element
T3 is disconnected.
Therefore, when polarity reverse control signal POL is high level, in first switching element T1 and second switch element T2
Only the 4th switch element T4 is connected in only first switching element T1 conducting, third switch element T3 and the 4th switch element T4, the
One exchange common voltage ACVCOM1 is the first common voltage VCOM1, and the second exchange common voltage ACVCOM2 is the first exchange
Common voltage ACVCOM1 is obtained by the first phase inverter, then the second exchange common voltage ACVCOM2 is the first common voltage
The polarity reversal voltage of VCOM1.
Similarly, when polarity reverse control signal POL is low level, the second control terminal of second switch element T2 receives the pole
The polarity reversal signal that sex reversal controls signal POL is high level, so that second switch element T2 is connected, so that second switch is first
It is low level that the third path end of part T2, which receives the second common voltage VCOM2 by the second switch element T2 of conducting, and second
The third path end of switch element T2 is connected with the 8th path terminal of the 4th switch element T4, therefore the 8th of the 4th switch element T4
The low level signal that first exchange common voltage ACVCOM1 of path terminal output is the second common voltage VCOM2.And second switch
The third path end of element T2 is connected with the third control terminal of third switch element T3, then the third control of third switch element T3
End receives low level and third switch element T3 is connected, then the third that the 6th path terminal of third switch element T3 passes through conducting
It is high level that switch element T3, which receives the first common voltage VCOM1,.At this point, the first control terminal receiving pole of first switching element T1
Sex reversal controls polarity reversal signal, that is, high level signal of signal POL, so that first switching element T1 is disconnected；Third switch member
The 6th path terminal of part T3 is also connected with the 4th control terminal of the 4th switch element T4, then the 4th control of the 4th switch element T4
End receives high level and disconnects the 4th switch element T4.
Therefore, when polarity reverse control signal POL is low level, in first switching element T1 and second switch element T2
Only third switch element T3 is connected in only second switch element T2 conducting, third switch element T3 and the 4th switch element T4, the
One exchange common voltage ACVCOM1 is the second common voltage VCOM2, and the second exchange common voltage ACVCOM2 is the first exchange
Common voltage ACVCOM1 is obtained by the first phase inverter, then the second exchange common voltage ACVCOM2 is the second common voltage
The polarity reversal voltage of VCOM2.
From the foregoing, it will be observed that the circuit connection of the public voltage generating circuit of the present embodiment, so that as polarity inverts control letter
The voltage of each polarity reversion of number POL, the first exchange common voltage ACVCOM1 becomes second from the first common voltage VCOM1
Common voltage VCOM2 becomes the first common voltage VCOM1 from the second common voltage VCOM2, realizes the first common voltage
The polarity of ACVCOM1 inverts.Correspondingly, as each polarity of polarity reverse control signal POL inverts, the second exchange common electrical
The polarity that the voltage of pressure ACVCOM2 becomes the second common voltage VCOM2 from the polarity reversal voltage of the first common voltage VCOM1 is anti-
Turn voltage or becomes the polarity reversion electricity of the first common voltage VCOM1 from the polarity reversal voltage of the second common voltage VCOM2
Pressure realizes the polarity reversion of the second common voltage ACVCOM2.
The public voltage generating circuit of the present embodiment is connect by the corresponding circuit connection of public voltage generating circuit 100
The first common voltage VCOM1 and the second common voltage VCOM2 are received, and according to polarity reverse control signal POL, output polarity is opposite
First exchange common voltage ACVCOM1 and second exchange common voltage ACVCOM2 so that first exchange common voltage
The data that the exchange of ACVCOM1 or second common voltage ACVCOM2 can be exported on pieces of data line with source electrode drive circuit 200
The polarity of signal is consistent, so as to avoid the generation of the inverse phenomenon on liquid crystal display panel 300.
3rd embodiment
Fig. 3 is the waveform correlation figure of the output voltage of the public voltage generating circuit of an embodiment.In this example, first is handed over
It is consistent with the polarity for the data-signal that source electrode drive circuit 200 exports on the data line of odd column to flow common voltage ACVCOM1,
The pole for the data-signal that second exchange common voltage ACVCOM2 and source electrode drive circuit 200 export on the data line of even column
Property is consistent, and waveform diagram as shown in Figure 3 can be obtained.
Specifically, the first exchange common voltage ACVCOM1 and the second exchange common voltage ACVCOM2 are controlled as polarity inverts
Each polarity of signal POL processed inverts and and then polarity inverts, moreover, passing through the first exchange common voltage ACVCOM1 and source electrode
The polarity for the data-signal Odd Source that driving circuit 200 exports on the data line of odd column is consistent, so that the first exchange
The data-signal Odd Source that common voltage ACVCOM1 and source electrode drive circuit 200 export on the data line of odd column is total
Same-action avoids the inverse for the pixel unit being connected with the data line of odd column in the same pixel unit of display panel 300
The generation of phenomenon；It is exported on the data line of even column by the second exchange common voltage ACVCOM2 with source electrode drive circuit 200
Data-signal Even Source polarity it is consistent so that the second exchange common voltage ACVCOM2 and source electrode drive circuit 200
The data-signal Even Source collective effect exported on the data line of even column is in the same pixel list of display panel 300
Member avoids the generation of the inverse phenomenon for the pixel unit being connected with the data line of even column.Wherein, because the first exchange is public
Voltage ACVCOM1 with second exchange common voltage ACVCOM2 be it is opposite polarity, correspondingly, exported on the data line of odd column
Data-signal Odd Source and even column data line on the polarity of data-signal Even Source that exports on the contrary, from
And the pixel unit on display panel 300 can be made to do column inversion or dot inversion.
Fig. 4 is the waveform correlation figure of the output voltage of the public voltage generating circuit of an embodiment.As shown, real one
It applies in example, the data that the first exchange common voltage ACVCOM1 and source electrode drive circuit 200 export on the data line of odd column are believed
Number polarity it is consistent, first exchange common voltage ACVCOM1 is also exported on the data line of even column with source electrode drive circuit 200
Data-signal polarity it is consistent.Specifically, by the first exchange common voltage ACVCOM1 and source electrode drive circuit 200 in surprise
The polarity of the data-signal exported on the data line of ordered series of numbers is consistent, so that the first exchange common voltage ACVCOM1 and source drive
The data-signal collective effect that circuit 200 exports on the data line of odd column is kept away in the same pixel unit of display panel 300
The generation of the inverse phenomenon for the pixel unit being connected with the data line of odd column is exempted from；Pass through the first exchange common voltage
ACVCOM1 is consistent with the polarity for the data-signal that source electrode drive circuit 200 exports on the data line of even column, so that first hands over
Stream common voltage ACVCOM1 and the data-signal collective effect that is exported on the data line of even column of source electrode drive circuit 200 in
The same pixel unit of display panel 300 avoids the production of the inverse phenomenon for the pixel unit being connected with the data line of even column
It is raw.Wherein, because the first exchange common voltage ACVCOM1 not only with the data-signal polarity one that is exported on the data line of odd column
It causes, and consistent with the polarity of data-signal exported on the data line of even column, so as to make the pixel on display panel 300
Unit does row reversion or frame reversion.The public voltage generating circuit of the present embodiment, by first exchange common voltage ACVCOM1 or
The data that second exchange common voltage ACVCOM2 and source electrode drive circuit 200 export on the data line of odd column or even column
The polarity of signal is consistent, so as to avoid the generation of the inverse phenomenon on liquid crystal display panel 300, meanwhile, also make to show
Pixel unit on panel 300 does corresponding polarity reversion.
Fourth embodiment
The present embodiment also provides a kind of source electrode drive circuit 200, and source electrode drive circuit 200 includes that above-mentioned common voltage produces
Raw circuit.
The source electrode drive circuit 200 of the present embodiment receives the first common voltage by public voltage generating circuit 100
VCOM1 and the second common voltage VCOM2, and according to polarity reverse control signal POL, the first opposite exchange of output polarity is public
The exchange common voltage ACVCOM2 of voltage ACVCOM1 and second, so that the first exchange common voltage ACVCOM1 or the second exchange are public
The polarity for the data-signal that common voltage ACVCOM2 can be exported on pieces of data line with source electrode drive circuit 200 is consistent,
So as to avoid the generation of the inverse phenomenon on liquid crystal display panel 300.
5th embodiment
The present embodiment also provides a kind of liquid crystal display device, and liquid crystal display device includes that above-mentioned common voltage generates electricity
Road.
The liquid crystal display device of the present embodiment, by public voltage generating circuit 100 receive the first common voltage VCOM1 and
Second common voltage VCOM2, and according to polarity reverse control signal POL, the first opposite exchange common voltage of output polarity
The exchange common voltage ACVCOM2 of ACVCOM1 and second, so that the first exchange common voltage ACVCOM1 or the second exchange common electrical
The polarity for the data-signal that pressure ACVCOM2 can be exported on pieces of data line with source electrode drive circuit 200 is consistent, thus
Avoid the generation of the inverse phenomenon on liquid crystal display panel 300.
More than, it is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, although this
Invention has been disclosed in a preferred embodiment above, however is not limited to invent, any person skilled in the art, not
It is detached within the scope of inventive technique scheme, when the technology contents using the disclosure above make a little change or are modified to equivalent variations
Equivalent embodiment, but all without departing from inventive technique scheme content, the technical spirit according to invention makees above embodiments
Any simple modification, equivalent change and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of public voltage generating circuit, which is characterized in that the public voltage generating circuit (100) receives the first common electrical
Press (VCOM1) and the second common voltage (VCOM2), and according to polarity reverse control signal (POL), output polarity on the contrary first
Exchange common voltage (ACVCOM1) exchanges common voltage (ACVCOM2) with second, and the first exchange common voltage
(ACVCOM1) or second exchange common voltage (ACVCOM2) exports on corresponding data line with source electrode drive circuit (200)
Data-signal polarity it is consistent, and the data-signal and consistent to exchange common voltage common with the data-signal polarity
Act on the same pixel unit of display panel (300).
2. public voltage generating circuit as described in claim 1, which is characterized in that the polarity reverse control signal (POL)
From the data decoder of the source electrode drive circuit (200) or from sequential control circuit.
3. public voltage generating circuit as described in claim 1, which is characterized in that with the polarity reverse control signal
(POL) each polarity reversion, the voltage of first exchange common voltage (ACVCOM1) is from first common voltage
(VCOM1) become second common voltage (VCOM2) or become first public affairs from second common voltage (VCOM2)
Common voltage (VCOM1).
4. public voltage generating circuit as claimed in claim 3, which is characterized in that the public voltage generating circuit (100)
Including
First switching element (T1), the first switching element (T1) include the first control terminal, the first path terminal and alternate path
First control terminal at end, the first switching element (T1) receives the polarity reverse control signal (POL), the first switch
The alternate path end of element (T1) receives second common voltage (VCOM2)；
Second switch element (T2), the second switch element (T2) include the second control terminal, third path end and fourth passage
End, the polarity that the second control terminal of the second switch element (T2) receives the polarity reverse control signal (POL) invert letter
Number, the fourth passage end of the second switch element (T2) receives second common voltage (VCOM2)；
Third switch element (T3), the third switch element (T3) include third control terminal, fifth passage end and the 6th access
End, the third control terminal of the third switch element (T3) are connected with the third path end of the second switch element (T2), institute
The fifth passage end for stating third switch element (T3) receives first common voltage (VCOM1), the third switch element
(T3) the 6th path terminal is connected with the first path terminal of the first switching element (T1)；
4th switch element (T4), the 4th switch element (T4) include the 4th control terminal, the 7th path terminal and the 8th access
End, the 4th control terminal of the 4th switch element (T4) are connected with the first path terminal of the first switching element (T1), institute
The 7th path terminal for stating the 4th switch element (T4) receives second common voltage (VCOM2), the 4th switch element
(T4) the 8th path terminal is connected with the third path end of the second switch element (T2), and it is public also to export first exchange
Voltage (ACVCOM1)；
First negater (101), first negater (101) include input terminal and output end, the first reverse phase member
The input terminal of part (101) is connected with the 8th path terminal of the 4th switch element (T4), first negater (101)
Output end output second exchange common voltage (ACVCOM2).
5. public voltage generating circuit as claimed in claim 4, which is characterized in that the first switching element (T1) and described
Second switch element (T2) is NMOS tube, and the third switch element (T3) and the 4th switch element (T4) are PMOS tube.
6. public voltage generating circuit as claimed in claim 4, which is characterized in that the public voltage generating circuit (100)
Including the second negater, second negater includes input terminal and output end, the input terminal of second negater
Receive the polarity reverse control signal (POL), the output end of second negater and the second switch element (T2)
The second control terminal be connected.
7. public voltage generating circuit as described in claim 1, which is characterized in that the first exchange common voltage
(ACVCOM1) consistent with the polarity of data-signal that the source electrode drive circuit (200) exports on the data line of odd column, institute
State the number that the second exchange common voltage (ACVCOM2) exports on the data line of even column with the source electrode drive circuit (200)
It is believed that number polarity it is consistent.
8. public voltage generating circuit as described in claim 1, which is characterized in that the first exchange common voltage
(ACVCOM1) consistent with the polarity of data-signal that the source electrode drive circuit (200) exports on the data line of odd column, institute
State what the first exchange common voltage (ACVCOM1) also exported on the data line of even column with the source electrode drive circuit (200)
The polarity of data-signal is consistent.
9. a kind of source electrode drive circuit, which is characterized in that the source electrode drive circuit (200) includes as appointed in claim 1 to 8
Public voltage generating circuit described in one.
10. a kind of liquid crystal display device, which is characterized in that the liquid crystal display device includes such as any one of claims 1 to 8
The public voltage generating circuit.
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| CN201810574958.XA CN108877705B (en) | 2018-06-06 | 2018-06-06 | Common voltage generating circuit, source electrode driving circuit and liquid crystal display device |
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| CN201810574958.XA CN108877705B (en) | 2018-06-06 | 2018-06-06 | Common voltage generating circuit, source electrode driving circuit and liquid crystal display device |
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| CN108877705B (en) | 2021-01-15 |
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