CN107564489A - The driving method of liquid crystal display device - Google Patents
The driving method of liquid crystal display device Download PDFInfo
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- CN107564489A CN107564489A CN201710943091.6A CN201710943091A CN107564489A CN 107564489 A CN107564489 A CN 107564489A CN 201710943091 A CN201710943091 A CN 201710943091A CN 107564489 A CN107564489 A CN 107564489A
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Abstract
The present invention provides a kind of driving method of liquid crystal display device.This method using time schedule controller according to initial data signal judge the brightness to be shown of adjacent rows pixel relation generation corresponding to control signal into source electrode driver,Make when the brightness to be shown of adjacent rows pixel is identical or the brightness to be shown of previous row pixel is less than the brightness to be shown of rear one-row pixels,Voltage on adjacent two data line is carried out electric charge in the period of first high level of row latch signal after reverse signal level change and shared by source electrode driver,When current one-row pixels brightness to be shown is more than the brightness to be shown of rear one-row pixels,Source electrode driver be expert at latch signal each high level period in by adjacent two data line voltage carry out electric charge share,So that in the reverse signal level constant period only adjacent rows pixel picture by vain to during blacking just carry out electric charge share,Significantly reduce the power consumption and temperature of source electrode driver.
Description
Technical field
The present invention relates to technical field of liquid crystal display, more particularly to a kind of driving method of liquid crystal display device.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD) has thin fuselage, power saving, radiationless etc. numerous excellent
Point, is widely used.Such as：LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen
Curtain or notebook computer screen etc., occupy an leading position in flat display field.
Liquid crystal display major part on existing market is backlight liquid crystal display, and it includes liquid crystal panel and backlight mould
Group (backlight module).The operation principle of liquid crystal panel is in thin-film transistor array base-plate (Thin Film
Transistor Array Substrate, TFT Array Substrate) and colored filter substrate (Color Filter,
CF liquid crystal molecule is poured between), and applies driving voltage on two plate bases to control the direction of rotation of liquid crystal molecule, will the back of the body
The light of optical mode group reflects generation picture.
In active liquid crystal panel, each pixel includes a thin film transistor (TFT) (TFT), the grid of thin film transistor (TFT)
(Gate) horizontal scanning line is connected to, source electrode (Source) is connected to the data wire of vertical direction, and drain electrode (Drain) is then connected to
Pixel electrode.In the prior art, a plurality of data lines of liquid crystal panel is connected with source electrode driver (Source Driver), profit
With source electrode driver to pieces of data line applied signal voltage, electrically to connect so as to apply enough voltage in horizontal scanning line
Be connected to after all TFT on this horizontal scanning line open, the signal voltage on data wire can writing pixel, control different liquid
Brilliant light transmittance and then control color and the effect of brightness.
In the prior art, it is general to use to prevent liquid crystal molecule to be polarized for a long time in the presence of same direction electric field
Apply the type of drive of positive and negative alternating electric field, i.e. inversion driving mode to liquid crystal layer, to make the yawing moment cycle of liquid crystal molecule
Property conversion, so as to avoid the generation of polarization phenomena.Reverse drive mainly has frame reversion (Frame inversion), column inversion
The mode such as (Column inversion) and dot inversion (Dot inversion).In column inversion mode, the pole of same row pixel
Identical, the opposite polarity of adjacent column pixel of property.Meanwhile prior art is typically poor by time schedule controller (TCON) reception low-voltage
Data-signal corresponding to (LVDS) signal and transmission is divided to export reverse signal to source electrode driver, while to source electrode driver
(POL) and row latch signal (TP), reverse signal are pulse signal, generally in the duration of a frame picture level change once,
The polarity inversion for the signal voltage that source electrode driver is output it after the level change of reverse signal, liquid crystal polarization is prevented, and
Row latch signal is pulse signal, and source electrode driver is expert at the rising edge of latch signal latch data signal, lock of being expert at when arriving
Output signal voltage corresponding with the data-signal latched arranges in pairs or groups what is opened line by line to data wire after depositing the trailing edge arrival of signal
TFT, signal voltage is inputted line by line in each pixel, realize the driving of liquid crystal panel.
In order to prevent signal voltage, changing value is excessive in a short time, in the liquid crystal display device of application column inversion driving
In, prior art transmits the first control signal and the second control signal by time schedule controller to source electrode driver, controls source electrode
Voltage on adjacent data wire is carried out charge share (charge sharing) by driver, and the mode of charge share has two
Kind：In the first charge share mode, time schedule controller transmits low level first control signal and high electricity to source electrode driver
The second flat control signal, make after reverse signal level change in the period of first high level of row latch signal, source electrode
Driver carries out electric charge with the voltage on 2n-1 data lines by the 2n articles and shared, then when first decline of row latch signal
Along when arriving, source electrode driver drives the voltage on data wire to signal voltage corresponding with the data-signal of latch；Second
In kind charge share mode, time schedule controller transmits the first control signal and low level second of high level to source electrode driver
Control signal, in the period of each high level of the latch signal that makes to be expert at, source electrode driver is by the 2n articles and the 2n-1 articles
Voltage on data wire carries out electric charge and shared, and then when the trailing edge of row latch signal arrives, source electrode driver is by data wire
On voltage drive to signal voltage corresponding with the data-signal of latch.Under the first charge share mode, work as liquid crystal
The power consumption of showing device source electrode driver in display bright dark alternate picture line by line is maximum, temperature highest, in second of electric charge point
Enjoy under mode, when liquid crystal display device is showing white picture, the power consumption of source electrode driver is maximum, temperature highest.Source electrode driver
Power consumption and the too high liquid crystal display device that can restrict of temperature develop to the direction of more large scale and higher frequency.
The content of the invention
It is an object of the invention to provide a kind of driving method of liquid crystal display device, liquid crystal display device can be reduced
The power consumption of source electrode driver, the caloric value of source electrode driver is reduced, be advantageous to liquid crystal display device and realize large scale and high-frequency.
To achieve the above object, the present invention provides a kind of driving method of liquid crystal display device, comprises the following steps：
Step S1, liquid crystal display device is provided；The liquid crystal display device includes：Time schedule controller and time schedule controller
The source electrode driver of electric connection and the liquid crystal panel being electrically connected with source electrode driver；The liquid crystal panel is arranged including array
Multiple pixels of cloth, a plurality of data lines of connection corresponding with multiple row pixel and the multi-strip scanning line with the corresponding connection of multirow pixel,
A plurality of data lines is electrically connected with the source electrode driver；
Step S2, initial data signal is inputted to the time schedule controller；
Initial data signal is converted to convert data signal by step S3, described time schedule controller, and according to primary data
Signal judges control signal corresponding to the relation generation of adjacent rows pixel brightness to be shown, by the convert data signal, instead
Rotaring signal, row latch signal and the control signal are exported to source electrode driver；
Step S4, described source electrode driver is according to the convert data signal, reverse signal, row latch signal and control
Signal carries out column inversion driving to a plurality of data lines output signal voltage to liquid crystal panel；
If n is positive integer, in the step S4, when the brightness to be shown of adjacent rows pixel is identical or previous row pixel is waited to show
When showing that brightness is less than the brightness to be shown of rear one-row pixels, control signal that the source electrode driver transmits according to time schedule controller,
By on the 2n articles and 2n-1 data lines in the period of first high level of row latch signal after reverse signal level change
Voltage carry out electric charge share；When current one-row pixels brightness to be shown is more than the brightness to be shown of rear one-row pixels, the source electrode
The control signal that driver transmits according to time schedule controller, by the 2n articles in the period of each high level for latch signal of being expert at
Electric charge is carried out with the voltage on 2n-1 data lines to share.
The source electrode driver be expert at latch signal rising edge when the convert data signal that now inputs it is locked
Deposit, and drive the voltage on data wire to corresponding with the convert data signal of latch after the trailing edge arrival for latch signal of being expert at
Signal voltage.
The control signal includes the first control signal and the second control signal；
One-row pixels are waited to show after the brightness to be shown of adjacent rows pixel is identical or the brightness to be shown of previous row pixel is less than
When showing brightness, the time schedule controller exports the second control of low level first control signal and high level to source electrode driver
Signal；
When current one-row pixels brightness to be shown is more than the brightness to be shown of rear one-row pixels, the time schedule controller is to source electrode
The first control signal and low level second control signal of driver output high level.
The liquid crystal display device also includes gate drivers；
The multi-strip scanning line is electrically connected with gate drivers.
In the step S3, the time schedule controller obtains the brightness to be shown of adjacent rows pixel according to initial data signal
GTG, the relation of adjacent rows pixel brightness to be shown is judged according to the size of GTG.
The initial data signal is LVDS signals.
The convert data signal is mini-LVDS signals.
Each pixel includes thin film transistor (TFT) and pixel electrode；The grid of the thin film transistor (TFT) is electrically connected with corresponding
Scan line, source electrode be electrically connected with corresponding to data wire, drain electrode is electrically connected with the pixel electrode in pixel where it.
Beneficial effects of the present invention：A kind of driving method of liquid crystal display device provided by the invention, utilizes SECO
Device control signal to source electrode according to corresponding to initial data signal judges the relation generation of adjacent rows pixel brightness to be shown drives
In dynamic device, the one-row pixels after brightness to be shown of adjacent rows pixel is identical or the brightness to be shown of previous row pixel is less than are made to wait to show
When showing brightness, source electrode driver will be adjacent in the period of first high level of row latch signal after reverse signal level change
Voltage on two data lines carries out electric charge and shared, and current one-row pixels brightness to be shown is more than the brightness to be shown of rear one-row pixels
When, source electrode driver be expert at latch signal each high level period in by adjacent two data line voltage carry out electricity
Lotus is shared so that in the reverse signal level constant period only adjacent rows pixel picture by vain to during blacking
Carry out electric charge to share, significantly reduce the power consumption and temperature of source electrode driver.
Brief description of the drawings
In order to be further understood that the feature of the present invention and technology contents, refer to below in connection with the detailed of the present invention
Illustrate and accompanying drawing, however accompanying drawing only provide with reference to and explanation use, be not used for being any limitation as the present invention.
In accompanying drawing,
Fig. 1 is the flow chart of the driving method of the liquid crystal display device of the present invention；
Fig. 2 is the step S1 of the driving method of the liquid crystal display device of present invention schematic diagram；
Fig. 3 be the present invention liquid crystal display device driving method step S4 in the reverse signal level constant period when
Sequence figure.
Embodiment
Further to illustrate the technological means and its effect of the invention taken, below in conjunction with being preferable to carry out for the present invention
Example and its accompanying drawing are described in detail.
Referring to Fig. 1, the present invention provides a kind of driving method of liquid crystal display device, comprise the following steps：
Step S1, referring to Fig. 1, providing liquid crystal display device；The liquid crystal display device includes：Time schedule controller 100,
The source electrode driver 200 being electrically connected with time schedule controller 100 and the liquid crystal panel being electrically connected with source electrode driver 200
300；The liquid crystal panel 300 includes multiple pixels 310 of array arrangement, more datas of connection corresponding with multiple row pixel 310
Line 320 and the multi-strip scanning line 330 of connection corresponding with multirow pixel 310, a plurality of data lines 320 with the source electrode driver
200 are electrically connected with.
Specifically, the liquid crystal display device also includes gate drivers 400；The multi-strip scanning line 330 is and grid
Driver 400 is electrically connected with.
Specifically, each pixel 310 includes thin film transistor (TFT) T and pixel electrode 311；The grid of the thin film transistor (TFT) T
Scan line 330 corresponding to the electric connection of pole, data wire 320 corresponding to source electrode electric connection, drain electrode are electrically connected with pixel where its
Pixel electrode 311 in 310.
Step S2, initial data signal is inputted to the time schedule controller 100.
Specifically, the initial data signal is LDVS signals.
Step S3, referring to Fig. 3, initial data signal is converted to convert data signal by the time schedule controller 100, and
The control signal according to corresponding to initial data signal judges the relation generation of 310 brightness to be shown of adjacent rows pixel, by described in
Convert data signal, reverse signal POL, row latch signal TP and the control signal are exported to source electrode driver 200.
Specifically, the convert data signal is micro- low-voltage differential (mini-LDVS) signal.
Specifically, in the step S3, the time schedule controller 100 obtains adjacent rows pixel according to initial data signal
The GTG of 310 brightness to be shown, the relation of 310 brightness to be shown of adjacent rows pixel is judged according to the size of GTG.Further
Ground, in the step S3, the time schedule controller 100 in adjacent rows pixel 310 is received corresponding to previous row pixel just
Stored after beginning data-signal, then after receiving in adjacent rows pixel 310 initial number corresponding to one-row pixels it is believed that
After number, the pass of 310 brightness to be shown of adjacent rows pixel is obtained according to initial data signal corresponding to adjacent rows pixel 310
System.
Specifically, the control signal includes the first control signal LP1 and the second control signal LP2；When adjacent rows picture
Plain 310 brightness to be shown are identical or when 310 brightness to be shown of previous row pixel is less than rear 310 brightness to be shown of one-row pixels, institute
State the second control letter that time schedule controller 100 exports low level first control signal LP1 and high level to source electrode driver 200
Number LP2；
When current 310 brightness to be shown of one-row pixels is more than rear 310 brightness to be shown of one-row pixels, the time schedule controller
100 export the first control signal LP1 and low level second control signal LP2 of high level to source electrode driver 200.
Specifically, the reverse signal POL is in the prior art for controlling the signal that source electrode driver 200 exports to it
Voltage carries out the pulse signal of polarity inversion.Preferably, the high level time of the reverse signal POL and low level time are equal
It is equal for a frame duration of liquid crystal panel 300, namely reverse signal POL level keeps constant in same frame, and adjacent two frame
Interior reverse signal POL level is different.
Specifically, the row latch signal TP is in the prior art for controlling source electrode driver 200 according to change data
The pulse signal of signal voltage corresponding to signal output.It is expert at after latch signal TP rising edge arrival, source electrode driver 200 is right
The convert data signal for now inputting it is latched, and by the voltage on data wire after latch signal TP trailing edge arrives
Driving extremely signal voltage corresponding with the convert data signal of latch.
Step S4, described source electrode driver 200 is according to the convert data signal, reverse signal POL, row latch signal
TP and control signal carry out column inversion driving to the output signal voltage of a plurality of data lines 320 to liquid crystal panel 300, namely same
The polarity of row pixel 310 is identical, the opposite polarity of adjacent two row pixel 310.
It is important to note that in the step S4, when 310 brightness to be shown of adjacent rows pixel is identical or previous row
When 310 brightness to be shown of pixel is less than rear 310 brightness to be shown of one-row pixels, time schedule controller 100 is defeated to source electrode driver 200
Go out low level first control signal LP1 and high level the second control signal LP2, when the source electrode driver 200 receives
After low level first control signal LP1 and high level the second control signal LP2, start and only become in reverse signal POL level
Change and row latch signal TP carries out electric charge shared mode of operation when be high level, specially only in the change of reverse signal POL level
By the 2n articles and the voltage V on 2n-1 data lines 320 in the period of row latch signal TP first high level after change2n、
V2n-1Carry out electric charge share, when reverse signal POL level is constant the 2n articles with the voltage V on 2n-1 data lines 3202n、
V2n-1Shared without electric charge；And current 310 brightness to be shown of one-row pixels is when being more than rear 310 brightness to be shown of one-row pixels,
Time schedule controller 100 exports the first control signal LP1 of high level and low level second control signal to source electrode driver 200
LP2, when the source electrode driver 200 receives the first control signal LP1 and low level second control signal LP2 of high level
Afterwards, start and electric charge shared mode of operation is carried out when the latch signal TP that is expert at is high level, be specially expert at latch signal TP
Each high level period in by the 2n articles and the voltage V on 2n-1 data lines 3202n、V2n-1Electric charge is carried out to share, from
And referring to Fig. 3, the present invention in the reverse signal POL level constant period, only adjacent rows pixel 310 picture by white
Shared to electric charge is just carried out during blacking, source electrode driver is reduced close to the power consumption of half, prevent source electrode driver power consumption mistake
The problem of producing temperature rise greatly.
In summary, the driving method of liquid crystal display device of the invention, using time schedule controller according to initial number it is believed that
Number judge the brightness to be shown of adjacent rows pixel relation produce corresponding to control signal into source electrode driver, make to work as adjacent two
When the brightness to be shown of row pixel is identical or the brightness to be shown of previous row pixel is less than the brightness to be shown of rear one-row pixels, source drive
Device is after reverse signal level change by the electricity on adjacent two data line in the period of first high level of row latch signal
Pressure carries out electric charge and shared, and when current one-row pixels brightness to be shown is more than the brightness to be shown of rear one-row pixels, source electrode driver exists
The voltage on adjacent two data line is carried out into electric charge in the period of each high level of row latch signal to share, so that
In the reverse signal level constant period only adjacent rows pixel picture by vain to during blacking just carry out electric charge share, have
Reduce to effect the power consumption and temperature of source electrode driver.
It is described above, for the person of ordinary skill of the art, can be with technique according to the invention scheme and technology
Other various corresponding changes and deformation are made in design, and all these changes and deformation should all belong to the appended right of the present invention
It is required that protection domain.
Claims (8)
1. a kind of driving method of liquid crystal display device, it is characterised in that comprise the following steps：
Step S1, liquid crystal display device is provided；The liquid crystal display device includes：Time schedule controller (100) and time schedule controller
(100) source electrode driver (200) being electrically connected with and the liquid crystal panel (300) being electrically connected with source electrode driver (200)；Institute
Stating liquid crystal panel (300) includes multiple pixels (310) of array arrangement, more datas of connection corresponding with multiple row pixel (310)
Line (320) and the multi-strip scanning line (330) of connection corresponding with multirow pixel (310), a plurality of data lines (320) with the source
Driver (200) is electrically connected with；
Step S2, initial data signal is inputted to the time schedule controller (100)；
Initial data signal is converted to convert data signal by step S3, described time schedule controller (100), and according to primary data
Signal judge adjacent rows pixel (310) brightness to be shown relation produce corresponding to control signal, the change data is believed
Number, reverse signal (POL), row latch signal (TP) and the control signal exported to source electrode driver (200)；
Step S4, described source electrode driver (200) is according to the convert data signal, reverse signal (POL), row latch signal
(TP) and control signal is to a plurality of data lines (320) output signal voltage, and column inversion driving is carried out to liquid crystal panel (300)；
If n is positive integer, in the step S4, when adjacent rows pixel (310) brightness to be shown is identical or previous row pixel
(310) when brightness to be shown is less than rear one-row pixels (310) brightness to be shown, the source electrode driver (200) is according to sequential control
The control signal of device (100) transmission processed, first high level of row latch signal (TP) after reverse signal (POL) level change
Period in by the 2n articles with 2n-1 data lines (320) voltage progress electric charge share；Current one-row pixels (310) are waited to show
When showing that brightness is more than rear one-row pixels (310) brightness to be shown, the source electrode driver (200) is according to time schedule controller (100)
The control signal of transmission, by the 2n articles and 2n-1 data lines in the period of each high level of latch signal of being expert at (TP)
(320) voltage on carries out electric charge and shared.
2. the driving method of liquid crystal display device as claimed in claim 1, it is characterised in that the source electrode driver (200)
Be expert at latch signal (TP) rising edge when the convert data signal that now inputs it is latched, and latch signal of being expert at
(TP) trailing edge drives the voltage on data wire (320) to signal corresponding with the convert data signal of latch electricity after arriving
Pressure.
3. the driving method of liquid crystal display device as claimed in claim 1, it is characterised in that the control signal includes first
Control signal (LP1) and the second control signal (LP2)；
A line picture after adjacent rows pixel (310) brightness to be shown is identical or previous row pixel (310) brightness to be shown is less than
During plain (310) brightness to be shown, the time schedule controller (100) controls to source electrode driver (200) output low level first
The second control signal (LP2) of signal (LP1) and high level；
When current one-row pixels (310) brightness to be shown is more than rear one-row pixels (310) brightness to be shown, the time schedule controller
(100) the first control signal (LP1) of high level and low level second control signal are exported to source electrode driver (200)
(LP2)。
4. the driving method of liquid crystal display device as claimed in claim 1, it is characterised in that the liquid crystal display device also wraps
Include gate drivers (400)；
The multi-strip scanning line (330) is electrically connected with gate drivers (400).
5. the driving method of liquid crystal display device as claimed in claim 1, it is characterised in that in the step S3, when described
Sequence controller (100) obtains the GTG of adjacent rows pixel (310) brightness to be shown according to initial data signal, according to GTG
Size judges the relation of adjacent rows pixel (310) brightness to be shown.
6. the driving method of liquid crystal display device as claimed in claim 1, it is characterised in that the initial data signal is
LVDS signals.
7. the driving method of liquid crystal display device as claimed in claim 6, it is characterised in that the convert data signal is
Mini-LVDS signals.
8. the driving method of liquid crystal display device as claimed in claim 1, it is characterised in that each pixel (310) includes
Thin film transistor (TFT) (T) and pixel electrode (311)；Scan line corresponding to the grid electric connection of the thin film transistor (TFT) (T)
(330), data wire (320), the pixel electrode where drain electrode is electrically connected with it in pixel (310) corresponding to source electrode electric connection
(311)。
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| CN112068341A (en) * | 2020-09-17 | 2020-12-11 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal display panel and method for improving poor horizontal stripes of liquid crystal display panel |
| CN112509532A (en) * | 2020-12-08 | 2021-03-16 | 惠科股份有限公司 | Driving method and driving device of liquid crystal display panel and display device |
| CN112967693A (en) * | 2021-02-26 | 2021-06-15 | 北京集创北方科技股份有限公司 | Driving method and device, chip and electronic equipment |
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