CN106652954A - Data drive circuit and driving method thereof, source drive chip and display device - Google Patents
Data drive circuit and driving method thereof, source drive chip and display device Download PDFInfo
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- CN106652954A CN106652954A CN201710002755.9A CN201710002755A CN106652954A CN 106652954 A CN106652954 A CN 106652954A CN 201710002755 A CN201710002755 A CN 201710002755A CN 106652954 A CN106652954 A CN 106652954A
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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
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
Abstract
The invention discloses a data drive circuit and a driving method thereof, a source drive chip and a display device; by virtue of signal selectors, it can judge whether a data signal, which is outputted from a corresponding signal output end of a data driver, is a signal of a darkest gray-scale picture under a normally black mode or a signal of a brightest gray-scale picture under a normally white mode, if so, a public voltage signal, which is outputted from a public voltage signal output end, is transmitted to a corresponding signal output end of the data drive circuit, so that it stops charging and discharging a liquid crystal under the normally black mode of a normally black screen or the normally white mode of a normally white screen, otherwise, a data signal, which is outputted from a corresponding signal output end of the data driver, is outputted to a corresponding signal output end of the data drive circuit. Therefore, by improving the data drive circuit, power consumption of a liquid crystal display panel under the normally black mode of the normally black screen or the normally white mode of the normally white screen can be effectively reduced, and meanwhile, under the precondition of avoiding influence to the normal display of other pictures, service life of the liquid crystal screen can be effectively prolonged.
Description
Technical field
The present invention relates to field of computer technology, espespecially a kind of data drive circuit, its driving method, source driving chip
And display device.
Background technology
On the array base palte of existing display panels, including viewing area and non-display area, wherein, non-aobvious
Show that region can include the parts such as gate driver circuit, data drive circuit, time schedule controller, it is aobvious that gate driver circuit is used for
Show that region provides gated sweep signal, data drive circuit is used to provide data-signal for viewing area, and time schedule controller is used for
For the signal that gate driver circuit and data drive circuit provide clock signal, control gate drive circuit and data drive circuit
Output.
By taking 256 GTG display pictures as an example, the signal of data drive circuit output is as shown in figure 1, the dotted line table of centre
Show public voltage signal, from the beginning of the grayscale signal near dotted line, be gradually distance from dotted line, grayscale signal is followed successively by 0 GTG letter
Number, it is 1 grayscale signal, 2 grayscale signals, the grayscale signal of 3 grayscale signal ... 252,253 grayscale signals, 254 grayscale signals, 255 grey
Rank signal；Meanwhile, the level height of the polarity inversion signal (Polarity Inversion, POL) of time schedule controller output can
The polarity of the data-signal exported with control data drive circuit, as shown in Figure 1 so that grayscale signal is located at dotted line upper and lower two
Side.
Generally, by black picture to white picture, can be shown by 64 GTGs, 256 GTGs or other digit GTGs；
In the design process of circuit, in order to meet the normal display of picture, it will usually adjust gamma gamma voltages, to adapt to what is shown
Demand.In addition, in order to prevent the liquid crystal being located in the middle of display floater from polarizing, each GTG it is corresponding two it is opposite polarity
Gamma voltages.Therefore, it is corresponding after adjustment completes gamma voltages for the display panels of normally-black screen/Chang Baiping
Black picture/white picture equally has two opposite polarity gamma voltages, and the two gamma voltages are different from common electric voltage,
This is allowed for when display panels are in black picture/white picture, and data drive circuit also fills in the liquid crystal for viewing area
Electric discharge；Therefore, causing the power consumption of display panels increases, while reducing the service life of display panels.
Based on this, the power consumption of display panels how is reduced, increased the service life, be that those skilled in the art urgently solve
Technical problem certainly.
The content of the invention
A kind of data drive circuit, its driving method, source driving chip and display device are embodiments provided,
The power consumption of display panels how is reduced in solve prior art, is increased the service life.
A kind of data drive circuit provided in an embodiment of the present invention, including data driver；Also include：Drive with the data
The one-to-one multiple signal selectors of each signal output part of dynamic device；Wherein,
The first signal input part signal output part connection corresponding with the data driver of the signal selector, the
Binary signal input is connected with public voltage signal output end, the first signal control end and positive polarity gamma gamma voltage signals
End connection, secondary signal control end is connected with negative polarity gamma voltage signal end, and signal output part is corresponding with data drive circuit
Signal output part connection；The positive polarity gamma voltage signal end and the negative polarity gamma voltage signal end are respectively used to
The corresponding a pair opposite polarity gamma of the most bright grey menu of most dark grey menu or normal white mode of output normally black mode are electric
Pressure signal；
The signal selector, in the data letter for judging the corresponding signal output part output of the data driver
Number for normally black mode most dark grey menu signal or normal white mode most bright grey menu signal when, by the common electrical
The public voltage signal of pressure signal output part output exports signal output part corresponding to the data drive circuit；Judging
The data-signal of the corresponding signal output part output of the data driver for the non-most dark grey menu of normally black mode signal
Or often the signal of the non-most bright grey menu of white mode when, by the data of the corresponding signal output part output of the data driver
Signal output is to the corresponding signal output part of the data drive circuit.
In a kind of possible embodiment, in above-mentioned data drive circuit provided in an embodiment of the present invention, the letter
Number selector includes：Positive signal selector and minus polarity signal selector；Wherein,
The first signal input part signal output part corresponding with the data driver of the positive signal selector
Connection, secondary signal input is connected with public voltage signal output end, and signal control end is believed with the positive polarity gamma voltage
Number end connection, the connection of signal output part corresponding with data drive circuit signal output part；
The positive signal selector, for judging the corresponding signal output part output of the data driver
When positive polarity data-signal is identical with the positive polarity gamma voltage signal that the positive polarity gamma voltage signal end is exported, by institute
The public voltage signal for stating the output of public voltage signal output end exports signal output part corresponding to the data drive circuit；
When judging that the positive polarity data-signal is differed with the positive polarity gamma voltage signal, by the positive polarity data
Signal output is to the corresponding signal output part of the data drive circuit；
The first signal input part signal output part corresponding with the data driver of the minus polarity signal selector
Connection, secondary signal input is connected with public voltage signal output end, and signal control end is believed with the negative polarity gamma voltage
Number end connection, the connection of signal output part corresponding with data drive circuit signal output part；
The minus polarity signal selector, for judging the corresponding signal output part output of the data driver
When negative polarity data-signal is identical with the negative polarity gamma voltage signal that the negative polarity gamma voltage signal end is exported, by institute
The public voltage signal for stating the output of public voltage signal output end exports signal output part corresponding to the data drive circuit；
When judging that the negative polarity data-signal is differed with the negative polarity gamma voltage signal, by the negative polarity data
Signal output is to the corresponding signal output part of the data drive circuit.
In a kind of possible embodiment, in above-mentioned data drive circuit provided in an embodiment of the present invention, it is described just
Polar signal selector, including：Positive voltage comparator, first switch transistor and second switch transistor；Wherein,
The negative input of the positive voltage comparator is connected with the positive polarity gamma voltage signal end, positive pole input
End signal output part connection corresponding with the data driver, output end is connected with first node；The positive voltage comparator,
For judging the positive polarity data-signal and the positive polarity of the corresponding signal output part output of the data driver
Gamma voltage signal ends output positive polarity gamma voltage signal it is identical when, by the first level signal for pre-setting export to
The first node；When judging that the positive polarity data-signal is differed with the positive polarity gamma voltage signal, will be pre-
The second electrical level signal output for first arranging is to the first node；First level signal be low level signal, described second
Level signal is high level signal；Or, first level signal is high level signal, the second electrical level signal is low level
Signal；
The grid of the first switch transistor is connected with the first node, and source electrode is corresponding with the data driver
Signal output part connects, and drain signal output part connection corresponding with the data drive circuit；The first switch transistor
It is in the conduction state when the current potential of the first node is second electrical level；
The grid of the second switch transistor is connected with the first node, and source electrode is exported with the public voltage signal
End connection, drain signal output part connection corresponding with the data drive circuit；The second switch transistor is described
The current potential of one node is in the conduction state when being the first level.
In a kind of possible embodiment, in above-mentioned data drive circuit provided in an embodiment of the present invention, described
One level signal is low level signal, and when the second electrical level signal is high level signal, the first switch transistor is N-type
Transistor, the second switch transistor is P-type transistor；First level signal is high level signal, and described second is electric
When ordinary mail number is low level signal, the first switch transistor is P-type transistor, and the second switch transistor is that N-type is brilliant
Body pipe.
It is described negative in above-mentioned data drive circuit provided in an embodiment of the present invention in a kind of possible embodiment
Polar signal selector, including：Negative voltage comparator, the 3rd switching transistor and the 4th switching transistor；Wherein,
The negative input signal output part connection corresponding with the data driver of the negative voltage comparator, positive pole
Input is connected with the negative polarity gamma voltage signal end, and output end is connected with Section Point；The negative voltage comparator,
For judging the negative polarity data-signal and the negative polarity of the corresponding signal output part output of the data driver
Gamma voltage signal ends output negative polarity gamma voltage signal it is identical when, by the first level signal for pre-setting export to
The Section Point；When judging that the negative polarity data-signal is differed with the negative polarity gamma voltage signal, will be pre-
The second electrical level signal output for first arranging is to the Section Point；First level signal is low level signal；Described second
Level signal is high level signal；Or, first level signal is high level signal, the second electrical level signal is low level
Signal；
The grid of the 3rd switching transistor is connected with the Section Point, and source electrode is corresponding with the data driver
Signal output part connects, and drain signal output part connection corresponding with the data drive circuit；3rd switching transistor
It is in the conduction state when the current potential of the Section Point is second electrical level；
The grid of the 4th switching transistor is connected with the Section Point, and source electrode is exported with the public voltage signal
End connection, drain signal output part connection corresponding with the data drive circuit；4th switching transistor is described
The current potential of two nodes is in the conduction state when being the first level.
In a kind of possible embodiment, in above-mentioned data drive circuit provided in an embodiment of the present invention, described
One level signal is low level signal, and when the second electrical level signal is high level signal, the 3rd switching transistor is N-type
Transistor, the 4th switching transistor is P-type transistor；First level signal is high level signal, and described second is electric
When ordinary mail number is low level signal, the 3rd switching transistor is P-type transistor, and the 4th switching transistor is that N-type is brilliant
Body pipe.
The embodiment of the present invention additionally provides a kind of driving method of above-mentioned data drive circuit provided in an embodiment of the present invention,
Including：
The data-signal of the corresponding signal output part output of receiving data driver；
It is determined that whether the data-signal of the corresponding signal output part output of the data driver for receiving is normally-black mould
The signal of the signal of the most dark grey menu of formula or the most bright grey menu of normal white mode；
If so, then by public voltage signal output end export public voltage signal export corresponding to data drive circuit
Signal output part；
If it is not, then the data-signal of the corresponding signal output part output of the data driver is exported to the data driving
The corresponding signal output part of dynamic circuit.
In a kind of possible embodiment, in above-mentioned driving method provided in an embodiment of the present invention, the determination connects
Whether the data-signal of the corresponding signal output part output of the data driver that receives is that the most dull gray rank of normally black mode is drawn
The signal of the most bright grey menu of the signal in face or normal white mode, specifically includes：
Positive signal selector determines the data of the corresponding signal output part output of the data driver for receiving
Whether signal is identical with the positive polarity gamma voltage signal of positive polarity gamma voltage signal end output；
Minus polarity signal selector determines the data of the corresponding signal output part output of the data driver for receiving
Whether signal is identical with the negative polarity gamma voltage signal of negative polarity gamma voltage signal end output.
The embodiment of the present invention additionally provides a kind of source driving chip, including at least one it is provided in an embodiment of the present invention on
State data drive circuit.
The embodiment of the present invention additionally provides a kind of display device, including above-mentioned source drive core provided in an embodiment of the present invention
Piece.
The present invention has the beneficial effect that：
A kind of data drive circuit provided in an embodiment of the present invention, its driving method, source driving chip and display device,
The data drive circuit includes data driver, and with the one-to-one multiple signals of each signal output part of data driver
Selector, wherein, the first signal input part signal output part connection corresponding with data driver of signal selector, the second letter
Number input is connected with public voltage signal output end, and the first signal control end connects with positive polarity gamma gamma voltage signal ends
Connect, secondary signal control end is connected with negative polarity gamma voltage signal end, signal output part letter corresponding with data drive circuit
The connection of number output end；Therefore, the number of the corresponding signal output part output of data driver is may determine that by signal selector
It is believed that number be whether the signal of the most bright grey menu of the signal or normal white mode of the most dark grey menu of normally black mode, if so,
Then the public voltage signal that public voltage signal output end is exported is exported into signal output part corresponding to data drive circuit, made
Must stop to liquid crystal discharge and recharge in the normal white mode of the normally black mode of normally-black screen or Chang Baiping, reduce the moment to liquid crystal
Show the power consumption of panel；If it is not, then the data-signal of the corresponding signal output part output of data driver is exported to data-driven
The corresponding signal output part of circuit；Therefore, by the improvement to data drive circuit, display panels can effectively be reduced and is existed
Power consumption during the normal white mode of the normally black mode of normally-black screen or Chang Baiping, and in the same of the normal display for not affecting other pictures
When, and then effectively improve the service life of liquid crystal display.
Description of the drawings
Fig. 1 is the schematic diagram of the grayscale signal of data drive circuit output in prior art；
Fig. 2 is a kind of schematic diagram of the structure of the data drive circuit provided in the embodiment of the present invention；
Fig. 3 is the signal of the structure of the signal selector in a kind of data drive circuit provided in the embodiment of the present invention
Figure；
Fig. 4 is a kind of schematic diagram of the flow process of the driving method of the data drive circuit provided in the embodiment of the present invention.
Specific embodiment
A kind of data drive circuit provided in an embodiment of the present invention, its driving method, source electrode are driven below in conjunction with accompanying drawing
The specific embodiment of dynamic chip and display device is described in detail.
A kind of data drive circuit is embodiments provided, as shown in Fig. 2 data driver 10 can be included；Also
Can include：With the one-to-one multiple signal selectors 20 of each signal output part of data driver 10；Wherein,
First signal input part signal output part G [1] connection corresponding with data driver 10 of signal selector 20, the
Binary signal input is connected with public voltage signal output end Vcom, the first signal control end and positive polarity gamma voltage signal
End GAMMA [+] connection, secondary signal control end is connected with negative polarity gamma voltage signal end GAMMA [-], signal output part and
The corresponding signal output part OUTPUT connections of data drive circuit；Positive polarity gamma voltage signal end GAMMA [+] and negative polarity
Gamma voltage signal ends GAMMA [-] is respectively used to export the most dark grey menu of normally black mode or the most bright GTG of normal white mode
The corresponding a pair opposite polarity gamma voltage signals of picture；
Signal selector 20, in the data letter for judging corresponding signal output part G [1] output of data driver 10
Number for normally black mode most dark grey menu signal or normal white mode most bright grey menu signal when, common electric voltage is believed
The public voltage signal of number output end Vcom output exports signal output part OUTPUT corresponding to data drive circuit；Judging
The data-signal for going out corresponding signal output part G [1] output of data driver 10 is the non-most dark grey menu of normally black mode
During the signal of the non-most bright grey menu of signal or normal white mode, by corresponding signal output part G [1] output of data driver 10
Data-signal export signal output part OUTPUT corresponding to data drive circuit.
Above-mentioned data drive circuit provided in an embodiment of the present invention, by signal selector 20 data driver 10 is judged
Whether the data-signal of corresponding signal output part G [1] output is the signal or Chang Baimo of the most dark grey menu of normally black mode
The signal of the most bright grey menu of formula, the public voltage signal output for if so, then exporting public voltage signal output end Vcom
To the corresponding signal output part OUTPUT of data drive circuit so that in the normally black mode or the normal white mode of Chang Baiping of normally-black screen
When, stop to liquid crystal discharge and recharge, reduce power consumption of the moment to display panels；If it is not, then by the correspondence of data driver 10
Signal output part G [1] output data-signal export signal output part OUTPUT corresponding to data drive circuit；Therefore,
By the improvement to data drive circuit, normally black mode or Chang Baiping of the display panels in normally-black screen can be effectively reduced
Power consumption during normal white mode, and while the normal display of other pictures is not affected, and then effectively improve the use of liquid crystal display
Life-span.
It should be noted that can be directed to normally-black screen in above-mentioned data drive circuit provided in an embodiment of the present invention,
Can also be for Chang Baiping, by the setting of signal selector 20, realize reducing the power consumption of liquid crystal panel, here is not limited
It is fixed.
Specifically, by black picture to white picture, can be shown by 64 GTGs, 256 GTGs or other digit GTGs；
So that 256 GTGs show as an example, the most dark grey menu of normally black mode is to export the picture shown during 0 GTG, normal white mode
Most bright grey menu is to export the picture shown during 255 GTG；Certainly, during design display panels, Ke Yixuan
64 GTG display pictures are selected, it is also an option that 256 GTG display pictures, it is also an option that other digit GTGs show picture
Face, is not limited thereto.
Specifically, gamma voltages can be 14,10, or 16, if 14 gamma voltages are set, positive polarity
The normally black mode that gamma voltage signal ends GAMMA [+] and negative polarity gamma voltage signal end GAMMA [-] are exported respectively is most
The corresponding a pair opposite polarity gamma voltage signals of the dark most bright grey menu of grey menu or normal white mode are G7 and G8；
If 10 gamma voltages are set, positive polarity gamma voltage signal end GAMMA [+] and negative polarity gamma voltage signal end
Corresponding a pair of the pole of the most bright grey menu of most dark grey menu or normal white mode of the normally black mode that GAMMA [-] is exported respectively
Property contrary gamma voltage signals be G5 and G6；If 16 gamma voltages are set, positive polarity gamma voltage signal end
The most dark grey menu of the normally black mode that GAMMA [+] and negative polarity gamma voltage signal end GAMMA [-] are exported respectively or Chang Bai
The corresponding a pair opposite polarity gamma voltage signals of most bright grey menu of pattern are G8 and G9；Therefore, for gamma is electric
The setting of pressure, but selection 14, it is also an option that 10, or selection 16, here is not limited.
In the specific implementation, it is defeated in order to realize the signal output part G [1] corresponding to data driver 10 of signal selector 20
The data-signal for going out optionally is exported, in above-mentioned data drive circuit provided in an embodiment of the present invention, such as Fig. 3 institutes
Show, signal selector 20 can include：Positive signal selector 21 and minus polarity signal selector 22；Wherein,
The first signal input part signal output part G [1] corresponding with data driver 10 of positive signal selector 21
Connection, secondary signal input is connected with public voltage signal output end Vcom, and signal control end is believed with positive polarity gamma voltage
Number end GAMMA [+] connection, signal output part signal output part OUTPUT corresponding with data drive circuit connects；
Positive signal selector 21, for judging corresponding signal output part G [1] output of data driver 10
When positive polarity data-signal is identical with the positive polarity gamma voltage signal of positive polarity gamma voltage signal end GAMMA [+] output,
The public voltage signal that public voltage signal output end Vcom is exported is exported into signal output part corresponding to data drive circuit
OUTPUT；It is when judging that positive polarity data-signal is differed with positive polarity gamma voltage signal, positive polarity data-signal is defeated
Go out signal output part OUTPUT corresponding to data drive circuit；
The first signal input part signal output part G [1] corresponding with data driver 10 of minus polarity signal selector 22
Connection, secondary signal input is connected with public voltage signal output end Vcom, and signal control end is believed with negative polarity gamma voltage
Number end GAMMA [-] connection, signal output part signal output part OUTPUT corresponding with data drive circuit connects；
Minus polarity signal selector 22, for judging corresponding signal output part G [1] output of data driver 10
When negative polarity data-signal is identical with the negative polarity gamma voltage signal of negative polarity gamma voltage signal end GAMMA [-] output,
The public voltage signal that public voltage signal output end Vcom is exported is exported into signal output part corresponding to data drive circuit
OUTPUT；It is when judging that negative polarity data-signal is differed with negative polarity gamma voltage signal, negative polarity data-signal is defeated
Go out signal output part OUTPUT corresponding to data drive circuit.
In the specific implementation, export in order to realize selectivity of the positive signal selector 21 to data-signal,
In above-mentioned data drive circuit provided in an embodiment of the present invention, as shown in figure 3, positive signal selector 21, can include：Just
Voltage comparator 21a, first switch transistor T1 and second switch transistor T2；Wherein,
The negative input of positive voltage comparator 21a is connected with positive polarity gamma voltage signal end GAMMA [+], and positive pole is defeated
Enter end signal output part G [1] connection corresponding with data driver 10, output end is connected with first node P1；Positive voltage compares
Device 21a, for judging the positive polarity data-signal and positive pole of corresponding signal output part G [1] output of data driver 10
Property gamma voltage signal ends GAMMA [+] output positive polarity gamma voltage signal it is identical when, by the first level for pre-setting
Signal output is to first node P1；When judging that positive polarity data-signal is differed with positive polarity gamma voltage signal, will be pre-
The second electrical level signal output for first arranging is to first node P1；First level signal is low level signal, and second electrical level signal is
High level signal；Or, the first level signal is high level signal, second electrical level signal is low level signal；
The grid of first switch transistor T1 is connected with first node P1, and source electrode is defeated with the corresponding signal of data driver 10
Go out to hold G [1] to connect, drain signal output part OUTPUT connections corresponding with data drive circuit；First switch transistor T1 exists
The current potential of first node P1 is in the conduction state when being second electrical level；
The grid of second switch transistor T2 is connected with first node P1, and source electrode connects with public voltage signal output end Vcom
Connect, drain signal output part OUTPUT connections corresponding with data drive circuit；Second switch transistor T2 is in first node P1
Current potential be the first level when it is in the conduction state.
Specifically, first switch transistor T1 is under the control of first node P1, by the corresponding signal of data driver 10
The positive polarity data-signal of output end G [1] output exports signal output part OUTPUT corresponding to data drive circuit；Second opens
Transistor T2 is closed under the control of first node P1, the public voltage signal output that public voltage signal output end Vcom is exported
To the corresponding signal output part OUTPUT of data drive circuit.
Specifically, in above-mentioned data drive circuit provided in an embodiment of the present invention, the first level signal is low level letter
Number, when second electrical level signal is high level signal, first switch transistor T1 is N-type transistor, and second switch transistor T2 is P
Transistor npn npn；First level signal is high level signal, when second electrical level signal is low level signal, first switch transistor T1
For P-type transistor, second switch transistor T2 is N-type transistor.
Certainly, first switch transistor T1 can be N-type transistor, can also be P-type transistor；Second switch transistor
T2 can be N-type transistor, can also be P-type transistor, as shown in figure 3, here is not limited.
The above is only the concrete structure for illustrating positive signal selector 21, in the specific implementation, positive signal
The concrete structure of selector 21 is not limited to said structure provided in an embodiment of the present invention, can also be skilled person will appreciate that
Other structures, therefore not to repeat here.
In the specific implementation, export in order to realize selectivity of the minus polarity signal selector 22 to data-signal,
In above-mentioned data drive circuit provided in an embodiment of the present invention, as shown in figure 3, minus polarity signal selector 22, including：Negative voltage
Comparator 22a, the 3rd switching transistor T3 and the 4th switching transistor T4；Wherein,
Negative input signal output part G [1] connection corresponding with data driver 10 of negative voltage comparator 22a, just
Pole input is connected with negative polarity gamma voltage signal end GAMMA [-], and output end is connected with Section Point P2；Negative voltage compares
Device 22a, for judging the negative polarity data-signal and negative pole of corresponding signal output part G [1] output of data driver 10
Property gamma voltage signal ends GAMMA [-] output negative polarity gamma voltage signal it is identical when, by the first level for pre-setting
Signal output is to Section Point P2；When judging that negative polarity data-signal is differed with negative polarity gamma voltage signal, will be pre-
The second electrical level signal output for first arranging is to Section Point P2；First level signal is low level signal；Second electrical level signal is
High level signal；Or, the first level signal is high level signal, second electrical level signal is low level signal；
The grid of the 3rd switching transistor T3 is connected with Section Point P2, and source electrode is defeated with the corresponding signal of data driver 10
Go out to hold G [1] to connect, drain signal output part OUTPUT connections corresponding with data drive circuit；3rd switching transistor T3 exists
The current potential of Section Point P2 is in the conduction state when being second electrical level；
The grid of the 4th switching transistor T4 is connected with Section Point P2, and source electrode connects with public voltage signal output end Vcom
Connect, drain signal output part OUTPUT connections corresponding with data drive circuit；4th switching transistor T4 is in Section Point P2
Current potential be the first level when it is in the conduction state.
Specifically, the 3rd switching transistor T3 is under the control of Section Point P2, by the corresponding signal of data driver 10
The positive polarity data-signal of output end G [1] output exports signal output part OUTPUT corresponding to data drive circuit；4th opens
Transistor T4 is closed under the control of Section Point P2, the public voltage signal output that public voltage signal output end Vcom is exported
To the corresponding signal output part OUTPUT of data drive circuit.
Specifically, in above-mentioned data drive circuit provided in an embodiment of the present invention, the first level signal is low level letter
Number, when second electrical level signal is high level signal, the 3rd switching transistor T3 is N-type transistor, and the 4th switching transistor T4 is P
Transistor npn npn；First level signal is high level signal, when second electrical level signal is low level signal, the 3rd switching transistor T3
For P-type transistor, the 4th switching transistor T4 is N-type transistor.
Certainly, the 3rd switching transistor T3 can be N-type transistor, can also be P-type transistor；4th switching transistor
T4 can be N-type transistor, can also be P-type transistor, as shown in figure 3, here is not limited.
The above is only the concrete structure for illustrating minus polarity signal selector 22, in the specific implementation, minus polarity signal
The concrete structure of selector 22 is not limited to said structure provided in an embodiment of the present invention, can also be skilled person will appreciate that
Other structures, therefore not to repeat here.
Above-mentioned data drive circuit provided in an embodiment of the present invention is described in detail below in conjunction with specific embodiment.
Embodiment one：With reference to data drive circuit as shown in Figure 3, with the normally-black screen that 256 GTGs show, and arrange
As a example by 14 gamma voltages, when the most dark picture of normally-black picture is 0 GTG corresponding positive polarity gamma voltage be G7, negative pole
Property gamma voltages be G8.
When corresponding signal output part G [1] the output cathode data-signal of data driver 10, now positive signal
Selector 21 is in running order, and minus polarity signal selector 22 is closed, when in positive signal selector 21
Positive voltage comparator 21a judges the positive polarity data-signal and G7 of corresponding signal output part G [1] output of data driver 10
When identical, the output end output low level signal of positive voltage comparator 21a, the current potential of first node P1 is low level so that the
Two switching transistors T2 are opened, and first switch transistor T1 is closed, the common electrical that public voltage signal output end Vcom is exported
Pressure signal output is transmitted to corresponding data wire to the corresponding signal output part OUTPUT of data drive circuit, is now stopped
To liquid crystal discharge and recharge；When the positive voltage comparator 21a in positive signal selector 21 judges that positive polarity data-signal is more than
During G7, the output end output high level signal of positive voltage comparator 21a, the current potential of first node P1 is high level so that first
Switching transistor T1 is opened, and second switch transistor T2 is closed, and positive polarity data-signal is exported to data drive circuit correspondence
Signal output part OUTPUT, and transmit to corresponding data wire, to liquid crystal discharge and recharge.
When corresponding signal output part G [1] the output negative pole data-signal of data driver 10, now positive signal
Selector 21 is closed, and minus polarity signal selector 22 is in running order, when in minus polarity signal selector 22
Negative voltage comparator 22a judges the negative polarity data-signal and G8 of corresponding signal output part G [1] output of data driver 10
When identical, the output end output low level signal of negative voltage comparator 22a, the current potential of Section Point P2 is low level, and the 4th opens
Close transistor T4 to open, the 3rd switching transistor T3 is closed, the common electric voltage letter that public voltage signal output end Vcom is exported
Number signal output part OUTPUT corresponding to data drive circuit is exported, and transmitted to corresponding data wire, now stopped to liquid
Brilliant discharge and recharge；When the negative voltage comparator 22a in minus polarity signal selector 22 judges that negative polarity data-signal is less than G8,
The output end output high level signal of negative voltage comparator 22a, the current potential of Section Point P2 is high level, the 3rd switching transistor
T3 is opened, and the 4th switching transistor T4 is closed, and negative polarity data-signal is exported into signal output corresponding to data drive circuit
End OUTPUT, and transmit to corresponding data wire, to liquid crystal discharge and recharge.
Embodiment two：With reference to data drive circuit as shown in Figure 3, with the Chang Baiping that 256 GTGs show, and arrange
As a example by 14 gamma voltages, when the most bright picture of normal white picture is 255 GTG, corresponding positive polarity gamma voltage is G7, is born
Polarity gamma voltage is G8.
When corresponding signal output part G [1] the output cathode data-signal of data driver 10, now positive signal
Selector 21 is in running order, and minus polarity signal selector 22 is closed, when in positive signal selector 21
Positive voltage comparator 21a judges the positive polarity data-signal and G7 of corresponding signal output part G [1] output of data driver 10
When identical, the output end output low level signal of positive voltage comparator 21a, the current potential of first node P1 is low level so that the
Two switching transistors T2 are opened, and first switch transistor T1 is closed, the common electrical that public voltage signal output end Vcom is exported
Pressure signal output is transmitted to corresponding data wire to the corresponding signal output part OUTPUT of data drive circuit, is now stopped
To liquid crystal discharge and recharge；When the positive voltage comparator 21a in positive signal selector 21 judges that positive polarity data-signal is less than
During G7, the output end output high level signal of positive voltage comparator 21a, the current potential of first node P1 is high level so that first
Switching transistor T1 is opened, and second switch transistor T2 is closed, and positive polarity data-signal is exported to data drive circuit correspondence
Signal output part OUTPUT, and transmit to corresponding data wire, to liquid crystal discharge and recharge.
When corresponding signal output part G [1] the output negative pole grayscale signal of data driver 10, now positive signal
Selector 21 is closed, and minus polarity signal selector 22 is in running order, when in minus polarity signal selector 22
Negative voltage comparator 22a judges the negative polarity data-signal and G8 of corresponding signal output part G [1] output of data driver 10
When identical, the output end output low level signal of negative voltage comparator 22a, the current potential of Section Point P2 is low level, and the 4th opens
Close transistor T4 to open, the 3rd switching transistor T3 is closed, the common electric voltage letter that public voltage signal output end Vcom is exported
Number signal output part OUTPUT corresponding to data drive circuit is exported, and transmitted to corresponding data wire, now stopped to liquid
Brilliant discharge and recharge；When the negative voltage comparator 22a in minus polarity signal selector 22 judges that negative polarity data-signal is more than G8,
The output end output high level signal of negative voltage comparator 22a, the current potential of Section Point P2 is high level, the 3rd switching transistor
T3 is opened, and the 4th switching transistor T4 is closed, and negative polarity data-signal is exported into signal output corresponding to data drive circuit
End OUTPUT, and transmit to corresponding data wire, to liquid crystal discharge and recharge.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of above-mentioned data provided in an embodiment of the present invention and drives
The driving method of dynamic circuit, as shown in figure 4, following step can be included：
The data-signal of the corresponding signal output part output of S401, receiving data driver；
Whether the data-signal of the corresponding signal output part output of data driver that S402, determination are received is normally-black mould
The signal of the signal of the most dark grey menu of formula or the most bright grey menu of normal white mode；If so, then execution step S403；If
It is no, then execution step S404；
S403, by public voltage signal output end export public voltage signal export letter corresponding to data drive circuit
Number output end；
S404, the data-signal of data driver corresponding signal output part output is exported to data drive circuit correspondence
Signal output part.
In the specific implementation, step S402 in above-mentioned driving method provided in an embodiment of the present invention determines what is received
The data-signal of data driver corresponding signal output part output be whether the signal of the most dark grey menu of normally black mode or
Often the signal of the most bright grey menu of white mode, can specifically include：
Positive signal selector determines the data-signal of the corresponding signal output part output of the data driver for receiving
It is whether identical with the positive polarity gamma voltage signal of positive polarity gamma voltage signal end output；
Minus polarity signal selector determines the data-signal of the corresponding signal output part output of the data driver for receiving
It is whether identical with the negative polarity gamma voltage signal of negative polarity gamma voltage signal end output.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of source driving chip, including at least one
The above-mentioned data drive circuit that inventive embodiments are provided, it is embodied as can be found in above-mentioned data drive provided in an embodiment of the present invention
Dynamic circuit description, something in common is repeated no more.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of display device, including the embodiment of the present invention is carried
For above-mentioned source driving chip, the display device can be：Mobile phone, panel computer, television set, display, notebook computer,
Any product with display function such as DPF, navigator or part.The enforcement of the display device may refer to above-mentioned source
The embodiment of pole driving chip, repeats part and repeats no more.
A kind of data drive circuit, its driving method, source driving chip and display device are embodiments provided,
The data drive circuit includes data driver, and with the one-to-one multiple signals of each signal output part of data driver
Selector, wherein, the first signal input part signal output part connection corresponding with data driver of signal selector, the second letter
Number input is connected with public voltage signal output end, and the first signal control end connects with positive polarity gamma gamma voltage signal ends
Connect, secondary signal control end is connected with negative polarity gamma voltage signal end, signal output part letter corresponding with data drive circuit
The connection of number output end；Therefore, the number of the corresponding signal output part output of data driver is may determine that by signal selector
It is believed that number be whether the signal of the most bright grey menu of the signal or normal white mode of the most dark grey menu of normally black mode, if so,
Then the public voltage signal that public voltage signal output end is exported is exported into signal output part corresponding to data drive circuit, made
Must stop to liquid crystal discharge and recharge in the normal white mode of the normally black mode of normally-black screen or Chang Baiping, reduce the moment to liquid crystal
Show the power consumption of panel；If it is not, then the data-signal of the corresponding signal output part output of data driver is exported to data-driven
The corresponding signal output part of circuit；Therefore, by the improvement to data drive circuit, display panels can effectively be reduced and is existed
Power consumption during the normal white mode of the normally black mode of normally-black screen or Chang Baiping, and in the same of the normal display for not affecting other pictures
When, and then effectively improve the service life of liquid crystal display.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (10)
1. a kind of data drive circuit, including data driver；Characterized in that, also including：It is each with the data driver
The one-to-one multiple signal selectors of signal output part；Wherein,
The first signal input part signal output part connection corresponding with the data driver of the signal selector, the second letter
Number input is connected with public voltage signal output end, and the first signal control end connects with positive polarity gamma gamma voltage signal ends
Connect, secondary signal control end is connected with negative polarity gamma voltage signal end, signal output part letter corresponding with data drive circuit
The connection of number output end；The positive polarity gamma voltage signal end and the negative polarity gamma voltage signal end are respectively used to output
The most dark grey menu of normally black mode or the corresponding a pair opposite polarity gamma voltages letters of the most bright grey menu of normal white mode
Number；
The signal selector, for being in the data-signal for judging the corresponding signal output part output of the data driver
During the signal of the signal of the most dark grey menu of normally black mode or the most bright grey menu of normal white mode, by common electric voltage letter
The public voltage signal of number output end output exports signal output part corresponding to the data drive circuit；Described in judging
The data-signal of the corresponding signal output part output of data driver is the signal or normal of the non-most dark grey menu of normally black mode
During the signal of the non-most bright grey menu of white mode, by the data-signal of the corresponding signal output part output of the data driver
Export signal output part corresponding to the data drive circuit.
2. data drive circuit as claimed in claim 1, it is characterised in that the signal selector includes：Positive signal
Selector and minus polarity signal selector；Wherein,
The first signal input part signal output part connection corresponding with the data driver of the positive signal selector,
Secondary signal input is connected with public voltage signal output end, signal control end and the positive polarity gamma voltage signal end
Connection, signal output part signal output part connection corresponding with the data drive circuit；
The positive signal selector, in the positive pole for judging the corresponding signal output part output of the data driver
When property data-signal is identical with the positive polarity gamma voltage signal that the positive polarity gamma voltage signal end is exported, by the public affairs
The public voltage signal of common voltage signal output part output exports signal output part corresponding to the data drive circuit；Sentencing
Break when the positive polarity data-signal and differing with the positive polarity gamma voltage signal, by the positive polarity data-signal
Export signal output part corresponding to the data drive circuit；
The first signal input part signal output part connection corresponding with the data driver of the minus polarity signal selector,
Secondary signal input is connected with public voltage signal output end, signal control end and the negative polarity gamma voltage signal end
Connection, signal output part signal output part connection corresponding with the data drive circuit；
The minus polarity signal selector, in the negative pole for judging the corresponding signal output part output of the data driver
When property data-signal is identical with the negative polarity gamma voltage signal that the negative polarity gamma voltage signal end is exported, by the public affairs
The public voltage signal of common voltage signal output part output exports signal output part corresponding to the data drive circuit；Sentencing
Break when the negative polarity data-signal and differing with the negative polarity gamma voltage signal, by the negative polarity data-signal
Export signal output part corresponding to the data drive circuit.
3. data drive circuit as claimed in claim 2, it is characterised in that the positive signal selector, including：Positive electricity
Pressure comparator, first switch transistor and second switch transistor；Wherein,
The negative input of the positive voltage comparator is connected with the positive polarity gamma voltage signal end, electrode input end with
The corresponding signal output part connection of the data driver, output end is connected with first node；The positive voltage comparator, is used for
Judging the positive polarity data-signal and positive polarity gamma electricity of the corresponding signal output part output of the data driver
When the positive polarity gamma voltage signal of pressure signal end output is identical, the first level signal for pre-setting is exported to described the
One node；When judging that the positive polarity data-signal is differed with the positive polarity gamma voltage signal, will pre-set
Second electrical level signal output to the first node；First level signal is low level signal, the second electrical level letter
Number be high level signal；Or, first level signal is high level signal, the second electrical level signal is low level signal；
The grid of the first switch transistor is connected with the first node, source electrode signal corresponding with the data driver
Output end connects, and drain signal output part connection corresponding with the data drive circuit；The first switch transistor is in institute
The current potential for stating first node is in the conduction state when being second electrical level；
The grid of the second switch transistor is connected with the first node, and source electrode connects with the public voltage signal output end
Connect, drain signal output part connection corresponding with the data drive circuit；The second switch transistor is in the first segment
The current potential of point is in the conduction state when being the first level.
4. data drive circuit as claimed in claim 3, it is characterised in that first level signal is low level signal,
The second electrical level signal be high level signal when, the first switch transistor be N-type transistor, the second switch crystal
Manage as P-type transistor；
First level signal is high level signal, when the second electrical level signal is low level signal, the first switch
Transistor is P-type transistor, and the second switch transistor is N-type transistor.
5. data drive circuit as claimed in claim 2, it is characterised in that the minus polarity signal selector, including：Negative electricity
Pressure comparator, the 3rd switching transistor and the 4th switching transistor；Wherein,
The negative input signal output part connection corresponding with the data driver of the negative voltage comparator, positive pole input
End is connected with the negative polarity gamma voltage signal end, and output end is connected with Section Point；The negative voltage comparator, is used for
Judging the negative polarity data-signal and negative polarity gamma electricity of the corresponding signal output part output of the data driver
When the negative polarity gamma voltage signal of pressure signal end output is identical, the first level signal for pre-setting is exported to described the
Two nodes；When judging that the negative polarity data-signal is differed with the negative polarity gamma voltage signal, will pre-set
Second electrical level signal output to the Section Point；First level signal is low level signal；The second electrical level letter
Number be high level signal；Or, first level signal is high level signal, the second electrical level signal is low level signal；
The grid of the 3rd switching transistor is connected with the Section Point, source electrode signal corresponding with the data driver
Output end connects, and drain signal output part connection corresponding with the data drive circuit；3rd switching transistor is in institute
The current potential for stating Section Point is in the conduction state when being second electrical level；
The grid of the 4th switching transistor is connected with the Section Point, and source electrode connects with the public voltage signal output end
Connect, drain signal output part connection corresponding with the data drive circuit；4th switching transistor is in the second section
The current potential of point is in the conduction state when being the first level.
6. data drive circuit as claimed in claim 5, it is characterised in that first level signal is low level signal,
When the second electrical level signal is high level signal, the 3rd switching transistor is N-type transistor, the 4th switch crystal
Manage as P-type transistor；
First level signal is high level signal, when the second electrical level signal is low level signal, the 3rd switch
Transistor is P-type transistor, and the 4th switching transistor is N-type transistor.
7. a kind of driving method of the data drive circuit as described in any one of claim 1-6, it is characterised in that include：
The data-signal of the corresponding signal output part output of receiving data driver；
It is determined that whether the data-signal of the corresponding signal output part output of the data driver for receiving is normally black mode
The signal of the signal of most dark grey menu or the most bright grey menu of normal white mode；
If so, then by public voltage signal output end export public voltage signal export signal corresponding to data drive circuit
Output end；
If it is not, then the data-signal of the corresponding signal output part output of the data driver is exported to data-driven electricity
The corresponding signal output part in road.
8. driving method as claimed in claim 7, it is characterised in that the data driver correspondence that the determination is received
Signal output part output data-signal be whether normally black mode most dark grey menu signal or normal white mode it is most bright
The signal of grey menu, specifically includes：
Positive signal selector determines the data-signal of the corresponding signal output part output of the data driver for receiving
It is whether identical with the positive polarity gamma voltage signal of positive polarity gamma voltage signal end output；
Minus polarity signal selector determines the data-signal of the corresponding signal output part output of the data driver for receiving
It is whether identical with the negative polarity gamma voltage signal of negative polarity gamma voltage signal end output.
9. a kind of source driving chip, it is characterised in that drive including at least one data as described in any one of claim 1-6
Dynamic circuit.
10. a kind of display device, it is characterised in that including source driving chip as claimed in claim 9.
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