CN108319049A - Liquid crystal display and liquid crystal display driving method - Google Patents
Liquid crystal display and liquid crystal display driving method Download PDFInfo
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- CN108319049A CN108319049A CN201810142991.5A CN201810142991A CN108319049A CN 108319049 A CN108319049 A CN 108319049A CN 201810142991 A CN201810142991 A CN 201810142991A CN 108319049 A CN108319049 A CN 108319049A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136213—Storage capacitors associated with the pixel electrode
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
-
- 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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
-
- 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
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
Abstract
A kind of liquid crystal display of present invention offer and liquid crystal display driving method.The liquid crystal display corresponds to all sub-pixels and adds a display master control line, in first scanning signal to the last item scanning signal, sequentially grade passes, the first film transistor controlled in each row sub-pixel is opened, during data-signal charges line by line to storage capacitance, the display master control signal of the display master control line transmission controls the closing of the second thin film transistor (TFT) in all sub-pixels, third thin film transistor (TFT) is opened, the shorted on both ends of liquid crystal capacitance, keep uncharged state, so that picture shows black, black plug is realized；After storage capacitance charging complete in all sub-pixels, the display master control signal controls the opening of the second thin film transistor (TFT) in all sub-pixels, third thin film transistor (TFT) is closed, and the storage capacitance charges to liquid crystal capacitance so that picture is normally shown.The problems of the liquid crystal display can either realize black plug, and traditional black plug mode can be avoided.
Description
Technical field
The present invention relates to display technology field more particularly to a kind of liquid crystal displays and liquid crystal display driving method.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD) has thin fuselage, power saving, radiationless etc. numerous excellent
Point has obtained widely applying, such as：LCD TV, smart mobile phone, digital camera, tablet computer, computer screen or notebook
Computer screen etc..
Liquid crystal display on existing market is largely backlight liquid crystal display comprising shell is set in shell
Liquid crystal display panel and the backlight module (Backlight Module) in shell.The operation principle of liquid crystal display panel
It is to place liquid crystal molecule in the parallel glass substrate of two panels, liquid crystal molecule is controlled by the driving circuit of liquid crystal display
Change direction, the light refraction of backlight module is out generated into picture.
Since the response time problem of liquid crystal makes it smear do not occur, generally to improve the image quality of LCD dynamic menus
Black insertion technology can be used.There are two types of traditional LCD black insertion technologies are usual：
(1), as shown in Figure 1, being realized by controlling the different data-signal of 100 input of source electrode driver (Source IC)
A frame black is inserted between adjacent two frames show picture between+1 frame picture of kth (k is positive integer) frame picture and kth to draw
Face, wherein what is inputted to kth frame picture and+1 frame picture of kth is normal display data, what is inputted to black picture is black plug
Data.
There are certain defects for this black insertion technology：A, refreshing frequency is double, that is to say, that if liquid crystal display is originally
Refreshing frequency be 60Hz, then using after the black insertion technology, refreshing frequency has reformed into 120Hz, will certainly shorten picture in this way
The charging time of element, while increasing power consumption；B, black plug is completed by source electrode driver, then also needing to be equipped with one for source electrode driver
A picture cache module (Frame Buffer), to increase cost；C, the time of black plug is uncontrollable, can only be a frame picture
Time.
(2), it as shown in Fig. 2, directly extinguishing backlight when needing black plug, i.e., is drawn in display kth frame picture and+1 frame of kth
Backlight is normally lighted by backlight driver 200 when face, and is put out by backlight driver 200 between+1 picture of kth frame picture and kth
It goes out backlight.
There is also certain defects for this black insertion technology：A, pass backlight is not turned off, it is right so as to shorten the service life of backlight module
It is especially apparent for powerful backlight module；B, do not restored by " unlatching " corresponding to the liquid crystal molecule state of each pixel
For " closing ", when switching to a kind of lower " unlatching " state, the time needed is longer, after the arrival of next frame picture, needs
Longer time stablizes.
Invention content
The purpose of the present invention is to provide a kind of liquid crystal displays, can either realize black plug, and can avoid traditional black plug
The problems of mode.
Another object of the present invention is to provide a kind of liquid crystal display driving methods, can effectively realize the same of black plug
When avoid the problems of traditional black plug mode.
To achieve the above object, present invention firstly provides a kind of liquid crystal displays, including：
Multiple sub-pixels arranged in array correspond to the multi-strip scanning line per a line sub-pixel setting, are right respectively respectively
Answer the multiple data lines of each row sub-pixel setting and a display master control line of corresponding all sub-pixel settings；
If n, m is positive integer, line n m row sub-pixels correspond to be electrically connected nth bar scan line, m data lines and
The display master control line；The nth bar scan line is used for transmission nth bar scanning signal, and the m data lines are used for transmission
M data signals, the display master control line are used for transmission display master control signal；
Each sub-pixel includes storage capacitance, liquid crystal capacitance, first film transistor, the second thin film transistor (TFT) and
Three thin film transistor (TFT)s；For line n m row sub-pixels, the grid of the first film transistor is electrically connected nth bar scanning
Line, source electrode are electrically connected m data lines, and drain electrode is electrically connected one end of storage capacitance and the source electrode of the second thin film transistor (TFT)；
The grid of second thin film transistor (TFT) is electrically connected the display master control line, one end of drain electrode electric connection liquid crystal capacitance and the
The source electrode of three thin film transistor (TFT)s；The grid of the third thin film transistor (TFT) is electrically connected the display master control via a phase inverter
Line, drain electrode are electrically connected the other end of the liquid crystal capacitance and are electrically connected public electrode；
Scanning signal is written to every scan line successively, the first film transistor controlled in each row sub-pixel is opened, number
It is believed that number charging line by line to storage capacitance, at the same time, the display master control signal controls second in all sub-pixels
Thin film transistor (TFT) is closed, third thin film transistor (TFT) is opened, the both ends of the liquid crystal capacitance by the third thin film transistor (TFT) short circuit,
Keep uncharged state so that picture shows black, realizes black plug；After storage capacitance charging complete in all sub-pixels, institute
It states and shows that master control signal controls the second thin film transistor (TFT) opening in all sub-pixels, third thin film transistor (TFT) is closed, it is described to deposit
Storing up electricity, which is held, charges to liquid crystal capacitance so that picture is normally shown.
The storage capacitance is made of storage electrode and public electrode, and the liquid crystal capacitance is by pixel electrode and public electrode
It constitutes.
Optionally, the first film transistor, the second thin film transistor (TFT) and third thin film transistor (TFT) are that N-type film is brilliant
Body pipe；The scanning signal be high potential single pulse signal, the display master control signal first scanning signal to last
The grade of scanning signal keeps low potential during passing, and is changed into high potential after the last item scanning signal acts on.
Optionally, the first film transistor, the second thin film transistor (TFT) and third thin film transistor (TFT) are that p-type film is brilliant
Body pipe；The scanning signal be low potential single pulse signal, the display master control signal first scanning signal to last
The grade of scanning signal keeps high potential during passing, and is changed into low potential after the last item scanning signal acts on.
The first film transistor, the second thin film transistor (TFT) and third thin film transistor (TFT) be amorphous silicon film transistor,
Polycrystalline SiTFT or oxide semiconductor thin-film transistor.
The display master control signal is provided by sequence controller or gate driving IC.
The present invention also provides a kind of liquid crystal display driving methods, include the following steps：
Step S1, liquid crystal display is provided, the liquid crystal display includes：
Multiple sub-pixels arranged in array correspond to the multi-strip scanning line per a line sub-pixel setting, are right respectively respectively
Answer the multiple data lines of each row sub-pixel setting and a display master control line of corresponding all sub-pixel settings；
If n, m is positive integer, line n m row sub-pixels correspond to be electrically connected nth bar scan line, m data lines and
The display master control line；The nth bar scan line is used for transmission nth bar scanning signal, and the m data lines are used for transmission
M data signals, the display master control line are used for transmission display master control signal；
Each sub-pixel includes storage capacitance, liquid crystal capacitance, first film transistor, the second thin film transistor (TFT) and
Three thin film transistor (TFT)s；For line n m row sub-pixels, the grid of the first film transistor is electrically connected nth bar scanning
Line, source electrode are electrically connected m data lines, and drain electrode is electrically connected one end of storage capacitance and the source electrode of the second thin film transistor (TFT)；
The grid of second thin film transistor (TFT) is electrically connected the display master control line, one end of drain electrode electric connection liquid crystal capacitance and the
The source electrode of three thin film transistor (TFT)s；The grid of the third thin film transistor (TFT) is electrically connected the display master control via a phase inverter
Line, drain electrode are electrically connected the other end of the liquid crystal capacitance and are electrically connected public electrode；；
Step S2, into the charging stage, scanning signal is written to every scan line successively, controls the in each row sub-pixel
One thin film transistor (TFT) is opened, and data-signal charges line by line to storage capacitance, at the same time, the display master control signal control
The second thin film transistor (TFT) in all sub-pixels is closed, third thin film transistor (TFT) is opened, and the both ends of the liquid crystal capacitance are described
Third thin film transistor (TFT) short circuit keeps uncharged state so that picture shows black, realizes black plug；
Step S3, the stage is shown into disposable, after the storage capacitance charging complete in all sub-pixels, the display is total
Control signal controls the opening of the second thin film transistor (TFT) in all sub-pixels, third thin film transistor (TFT) is closed, the storage capacitance pair
Liquid crystal capacitance charges so that picture is normally shown.
Optionally, the first film transistor, the second thin film transistor (TFT) and third thin film transistor (TFT) are that N-type film is brilliant
Body pipe；The scanning signal be high potential single pulse signal, the display master control signal first scanning signal to last
The grade of scanning signal keeps low potential during passing, and is changed into high potential after the last item scanning signal acts on.
Optionally, the first film transistor, the second thin film transistor (TFT) and third thin film transistor (TFT) are that p-type film is brilliant
Body pipe；The scanning signal be low potential single pulse signal, the display master control signal first scanning signal to last
The grade of scanning signal keeps high potential during passing, and is changed into low potential after the last item scanning signal acts on.
Beneficial effects of the present invention：A kind of liquid crystal display provided by the invention is additionally arranged a display master control line, the
To the last item scanning signal, sequentially grade passes one scanning signal, and the first film transistor controlled in each row sub-pixel is opened,
During data-signal charges line by line to storage capacitance, the display master control signal of the display master control line transmission controls institute
There is the second thin film transistor (TFT) in sub-pixel to close, third thin film transistor (TFT) opening, the shorted on both ends of liquid crystal capacitance, holding is not filled
Electricity condition so that picture shows black, realizes black plug；It is described aobvious after storage capacitance all charging completes in all sub-pixels
Show that master control signal controls the second thin film transistor (TFT) opening in all sub-pixels, third thin film transistor (TFT) is closed, the storage electricity
Appearance charges to liquid crystal capacitance so that picture is normally shown.Compared to it is existing by control source electrode driver input it is different
Data-signal realizes traditional black insertion technology that a frame black picture is inserted between two adjacent frames show picture, liquid of the invention
Crystal display need not improve refreshing frequency and black plug can be realized, to avoid the increase of power consumption and cost, and black plug when
Between can be conveniently adjusted, optimal balance point can be found between black plug time and Dynamic Announce effect.It is logical compared to existing
It crosses and constantly switchs backlight to realize that traditional black insertion technology of black plug, liquid crystal display of the invention can be realized without operating backlight
Black plug avoids shortening backlight life, is more suitable for large-sized liquid crystal display.A kind of liquid crystal display provided by the invention drives
Dynamic method realizes black plug using above-mentioned liquid crystal display in the charging stage, realizes that picture is normally shown in the disposable display stage
Show, the problems of traditional black plug mode can be avoided while effectively realizing black plug.
Description of the drawings
For further understanding of the features and technical contents of the present invention, it please refers to below in connection with the detailed of the present invention
Illustrate and attached drawing, however, the drawings only provide reference and explanation, is not intended to limit the present invention.
In attached drawing,
Fig. 1 is the process schematic that traditional (1) plants black insertion technology；
Fig. 2 is the process schematic that traditional (2) plant black insertion technology；
Fig. 3 is that the liquid crystal display of the present invention realizes the process schematic of black plug；
Fig. 4 is the circuit structure diagram of the liquid crystal display of the present invention；
Fig. 5 be the present invention liquid crystal display in a sub-pixel particular circuit configurations figure；
Fig. 6 is the sequence diagram of the liquid crystal display of the present invention；
Fig. 7 is the flow chart of the liquid crystal display driving method of the present invention.
Specific implementation mode
Further to illustrate the technological means and its effect of the invention taken, below in conjunction with the preferred implementation of the present invention
Example and its attached drawing are described in detail.
Please refer to Fig. 3, Fig. 4, Fig. 5 and Fig. 6, present invention firstly provides a kind of liquid crystal displays, including：Multiple is in battle array
The sub-pixel SP of column arrangement, the respectively corresponding multi-strip scanning line 1 being arranged per a line sub-pixel SP correspond to each sub- picture of row respectively
The multiple data lines 3 of plain SP settings and a display master control line 5 of corresponding all sub-pixel SP settings.
If n, m is positive integer, line n m row sub-pixels SP, which is corresponded to, is electrically connected nth bar scan line 1, m datas
Line 3 and the display master control line 5；The nth bar scan line 1 is used for transmission nth bar scanning signal G (n), the m datas
Line 3 is used for transmission m data signal D (m), and the display master control line 5 is used for transmission display master control signal LO.
Specifically, include storage capacitance Cst, liquid crystal capacitance Clc, first in conjunction with Fig. 4 and Fig. 5, each sub-pixel SP
Thin film transistor (TFT) T1, the second thin film transistor (TFT) T2 and third thin film transistor (TFT) T3.The first film transistor T1, the second film
Transistor T2 and third thin film transistor (TFT) T3 is not limited to as amorphous silicon film transistor, polycrystalline SiTFT or oxide
Semiconductor thin-film transistor.For line n m row sub-pixel SP, the grid of the first film transistor T1 is electrically connected n-th
Scan line 1, source electrode are electrically connected m data lines 3, drain electrode be electrically connected storage capacitance Cst one end and the second film it is brilliant
The source electrode of body pipe T2；The grid of the second thin film transistor (TFT) T2 is electrically connected the display master control line 5, and drain electrode is electrically connected liquid
One end of brilliant capacitance Clc and the source electrode of third thin film transistor (TFT) T3；The grid of the third thin film transistor (TFT) T3 is via a reverse phase
Device F is electrically connected the display master control line 5, and drain electrode is electrically connected the other end of the liquid crystal capacitance Clc and is electrically connected public
Electrode Vcom；One end of the storage capacitance Cst is storage electrode (not shown, the storage electrode and each thin film transistor (TFT)
Source electrode and drain electrode be located at same layer), the other end be public electrode Vcom；One end of the liquid crystal capacitance Clc is pixel electrode
(not shown), the other end are public electrode Vcom.
In conjunction with Fig. 3 to Fig. 6, with the first film transistor T1, the second thin film transistor (TFT) T2 and third thin film transistor (TFT)
For T3 is N-type TFT, the course of work of the liquid crystal display is：
First, scanning signal G (n), i.e. first scanning signal G (1) to the last item are written to every scan line 1 successively
Sequentially grade passes scanning signal G (last), and each scanning signal G (n) is high potential single pulse signal, is controlled in each row sub-pixel SP
First film transistor T1 open, the corresponding data signal D (m) of X (X is positive integer) frame is via first film transistor T1
It charges line by line to storage capacitance Cst；The display master control signal LO is swept in first scanning signal G (1) to the last item
Retouch signal G (last) grade pass during keep low potential, control the second thin film transistor (TFT) T2 in all sub-pixel SP close,
Third thin film transistor (TFT) T3 is opened, and the both ends of liquid crystal capacitance Clc keep uncharged shape by the third thin film transistor (TFT) T3 short circuits
State so that picture shows black, realizes black plug.
After storage capacitance Cst charging completes in all sub-pixel SP, i.e. the last item scanning signal G (last) effects
After, each scanning signal G (n) is changed into low potential, and the first film transistor T1 controlled in each row sub-pixel SP is closed,
And the display master control signal LO is changed into high potential, the second thin film transistor (TFT) of control T2 is opened, third thin film transistor (TFT) T3 is closed
It closes, the storage capacitance Cst charges to liquid crystal capacitance Clc via the second thin film transistor (TFT) T2, and all sub-pixel SP are disposably shown
Show, to make the picture of X frame normally show.
The picture of X frame then enters the charging stage line by line of+1 frame of X after normally showing, and so on.
Further, when the size of liquid crystal display is larger, the display master control signal LO can be by sequence controller
(TCON) it provides；When the size of liquid crystal display is smaller, the display master control signal LO can be provided by gate driving IC.Pass through
Control scanning signal G (n) and display master control signal LO, it is convenient to which charging time, that is, black plug time shows with disposable line by line for adjusting
Show the time.
Certainly, the first film transistor T1, the second thin film transistor (TFT) T2 and third thin film transistor (TFT) T3 also can be P
Type thin film transistor (TFT).Correspondingly, the scanning signal G (n) is low potential single pulse signal, the display master control signal LO is the
The grade of one scanning signal G (1) to the last item scanning signal G (last) keep high potential during passing, and are swept in the last item
It is changed into low potential after retouching signal G (last) effects.
Different data-signal realizations is inputted in adjacent two frames display picture by controlling source electrode driver compared to existing
Traditional black insertion technology of a frame black picture is inserted between face, liquid crystal display of the invention need not improve refreshing frequency
Realize black plug, to avoid the increase of power consumption and cost, and the time of black plug can be conveniently adjusted, can be in the black plug time
Optimal balance point is found between Dynamic Announce effect.Realize that the tradition of black plug is inserted by constantly switching backlight compared to existing
Black plug can be realized without operating backlight in black technology, liquid crystal display of the invention, avoids shortening backlight life, is more suitable for big
The liquid crystal display of size.In addition, the liquid crystal display of the present invention makes liquid crystal capacitance Clc holdings not fill in the charging stage line by line
Electricity condition, liquid crystal is just returned to reset condition, and liquid crystalline phase generally compares from one the dispaly state conversion time from black to white
The dispaly state conversion time of grayscale to another grayscale wants short, so after next frame arrival, when display brightness stablizes required
Between also can be shorter.
Referring to Fig. 7, in conjunction with Fig. 3 to Fig. 6, the present invention also provides a kind of liquid crystal display driving methods, including walk as follows
Suddenly：
Step S1, liquid crystal display is provided, the liquid crystal display has above-mentioned structure as shown in figs. 4 and 5, herein
Repeated description no longer is carried out to the concrete structure of the liquid crystal display.
Step S2, into the charging stage, scanning signal G (n) is written to every scan line 1 successively, i.e., described first is swept
Retouching signal G (1) to the last item scanning signal G (last), sequentially grade passes, and controls the first film crystal in each row sub-pixel SP
Pipe T1 is opened, and data-signal D (m) charges to storage capacitance Cst via first film transistor T1, at the same time, described
Show that master control signal LO controls the second thin film transistor (TFT) T2 closings in all sub-pixel SP, third thin film transistor (TFT) T3 is opened,
The both ends of the liquid crystal capacitance Clc keep uncharged state so that picture shows black by the third thin film transistor (TFT) T3 short circuits
Color realizes black plug.
Specifically, if the first film transistor T1, the second thin film transistor (TFT) T2 and third thin film transistor (TFT) T3 are N
Type thin film transistor (TFT), then each scanning signal G (n) is high potential single pulse signal, and the display master control signal LO is swept at first
The grade for retouching signal G (1) to the last item scanning signal G (last) passes holding low potential in the process.
If the first film transistor T1, the second thin film transistor (TFT) T2 and third thin film transistor (TFT) T3 are p-type film
Transistor, then each scanning signal G (n) is low potential single pulse signal, and the display master control signal LO is in first scanning signal G
(1) high potential is kept during being passed to the grade of the last item scanning signal G (last).
Step S3, described after the storage capacitance Cst charging completes in all sub-pixel SP into the disposable display stage
Show that master control signal LO controls the second thin film transistor (TFT) T2 openings in all sub-pixel SP, third thin film transistor (TFT) T3 is closed,
The storage capacitance Cst charges to liquid crystal capacitance Clc so that picture is normally shown.
Specifically, if the first film transistor T1, the second thin film transistor (TFT) T2 and third thin film transistor (TFT) T3 are N
Type thin film transistor (TFT) enters the disposable display stage after the last item scanning signal G (last) is acted on, respectively sweeps
It retouches signal G (n) and is changed into low potential, and the display master control signal LO is changed into high potential.
If the first film transistor T1, the second thin film transistor (TFT) T2 and third thin film transistor (TFT) T3 are p-type film
Transistor enters the disposable display stage, each scanning signal after the last item scanning signal G (last) is acted on
G (n) is changed into high potential, and the display master control signal LO is changed into low potential.
Further, when the size of liquid crystal display is larger, the display master control signal LO can be provided by TCON；Work as liquid
When the size of crystal display is smaller, the display master control signal LO can be provided by gate driving IC.By controlling scanning signal G
(n) with display master control signal LO, it is convenient to adjust charging time, that is, black plug time line by line and disposable display time.
Different data-signal realizations is inputted in adjacent two frames display picture by controlling source electrode driver compared to existing
Traditional black insertion technology of a frame black picture is inserted between face, liquid crystal display driving method of the invention is by liquid crystal display
Black plug can be realized in the course of work of itself, need not improve refreshing frequency, to avoid the increase of power consumption and cost, and inserts
The black time can be conveniently adjusted, and can find optimal balance point between black plug time and Dynamic Announce effect.Compared to existing
Some realizes traditional black insertion technology of black plug by constantly switching backlight, and liquid crystal display driving method of the invention is without behaviour
Black plug can be realized as backlight, avoid shortening backlight life, be more suitable for large-sized liquid crystal display.
In conclusion the liquid crystal display of the present invention, is additionally arranged a display master control line, in first scanning signal to most
Sequentially grade passes latter scanning signal, and the first film transistor controlled in each row sub-pixel is opened, and data-signal is to storage electricity
During appearance is charged line by line, the display master control signal of the display master control line transmission controls second in all sub-pixels
Thin film transistor (TFT) is closed, third thin film transistor (TFT) is opened, and the shorted on both ends of liquid crystal capacitance keeps uncharged state so that picture
It shows black, realizes black plug；After storage capacitance charging complete in all sub-pixels, the display master control signal control is all
The second thin film transistor (TFT) in sub-pixel is opened, third thin film transistor (TFT) is closed, and the storage capacitance charges to liquid crystal capacitance, makes
Picture is obtained normally to show.Different data-signal realizations is inputted in two adjacent frames by controlling source electrode driver compared to existing
Traditional black insertion technology of a frame black picture is inserted between display picture, liquid crystal display of the invention need not improve refreshing frequency
Black plug can be realized in rate, and to avoid the increase of power consumption and cost, and the time of black plug can be conveniently adjusted, and can insert
Optimal balance point is found between black time and Dynamic Announce effect.Compared to existing black plug is realized by constantly switching backlight
Black plug can be realized without operating backlight in traditional black insertion technology, liquid crystal display of the invention, avoids shortening backlight life, more suitable
For large-sized liquid crystal display.The liquid crystal display driving method of the present invention, using above-mentioned liquid crystal display, in charging rank
Duan Shixian black plugs realize that picture is normally shown in the disposable display stage, can avoid tradition while effectively realizing black plug
The problems of black plug mode.
The above for those of ordinary skill in the art can according to the technique and scheme of the present invention and technology
Other various corresponding change and deformations are made in design, and all these change and distortions should all belong to the claim of the present invention
Protection domain.
Claims (9)
1. a kind of liquid crystal display, which is characterized in that including：
Multiple sub-pixels (SP) arranged in array, the respectively multi-strip scanning line (1) of the corresponding setting per a line sub-pixel (SP),
The multiple data lines (3) of each row sub-pixel (SP) setting are corresponded to respectively and one of corresponding all sub-pixel (SP) settings shows
Show master control line (5)；
If n, m is positive integer, line n m row sub-pixel (SP) is corresponding to be electrically connected nth bar scan line (1), m datas
Line (3) and the display master control line (5)；The nth bar scan line (1) is used for transmission nth bar scanning signal (G (n)), and described
M data lines (3) are used for transmission m datas signal (D (m)), and the display master control line (5) is used for transmission display master control signal
(LO)；
Each sub-pixel (SP) includes storage capacitance (Cst), liquid crystal capacitance (Clc), first film transistor (T1), second
Thin film transistor (TFT) (T2) and third thin film transistor (TFT) (T3)；For line n m row sub-pixel (SP), the first film crystal
The grid for managing (T1) is electrically connected nth bar scan line (1), and source electrode is electrically connected m data lines (3), and drain electrode is electrically connected and deposits
Storing up electricity holds the one end of (Cst) and the source electrode of the second thin film transistor (TFT) (T2)；The grid of second thin film transistor (TFT) (T2) is electrical
The display master control line (5) is connected, drain electrode is electrically connected one end of liquid crystal capacitance (Clc) and the source of third thin film transistor (TFT) (T3)
Pole；The grid of the third thin film transistor (TFT) (T3) is electrically connected the display master control line (5), drain electrode via a phase inverter (F)
It is electrically connected the other end of the liquid crystal capacitance (Clc) and is electrically connected public electrode (Vcom)；
Successively to every scan line (1) write-in scanning signal (G (n)), the first film crystal in each row sub-pixel (SP) is controlled
(T1) is managed to open, data-signal D (m) charges line by line to storage capacitance (Cst), at the same time, the display master control signal
(LO) the second thin film transistor (TFT) (T2) in all sub-pixels (SP) of control is closed, third thin film transistor (TFT) (T3) is opened, described
The both ends of liquid crystal capacitance (Clc) keep uncharged state so that picture shows black by third thin film transistor (TFT) (T3) short circuit
Color realizes black plug；After storage capacitance (Cst) charging complete in all sub-pixels (SP), display master control signal (LO) control
Make the second thin film transistor (TFT) (T2) opening in all sub-pixels (SP), third thin film transistor (TFT) (T3) is closed, the storage electricity
Hold (Cst) to charge to liquid crystal capacitance (Clc) so that picture is normally shown.
2. liquid crystal display as described in claim 1, which is characterized in that the storage capacitance (Cst) is by storage electrode and public affairs
Common electrode (Vcom) is constituted, and the liquid crystal capacitance (Clc) is made of pixel electrode and public electrode (Vcom).
3. liquid crystal display as described in claim 1, which is characterized in that the first film transistor (T1), the second film
Transistor (T2) and third thin film transistor (TFT) (T3) are N-type TFT；The scanning signal (G (n)) is high potential list
Pulse signal, the display master control signal (LO) is in first scanning signal (G (1)) to the last item scanning signal (G
(last)) grade keeps low potential during passing, and is changed into high electricity after the last item scanning signal (G (last)) is acted on
Position.
4. liquid crystal display as described in claim 1, which is characterized in that the first film transistor (T1), the second film
Transistor (T2) and third thin film transistor (TFT) (T3) are P-type TFT；The scanning signal (G (n)) is low potential list
Pulse signal, the display master control signal (LO) is in first scanning signal (G (1)) to the last item scanning signal (G
(last)) grade keeps high potential during passing, and is changed into low electricity after the last item scanning signal (G (last)) is acted on
Position.
5. liquid crystal display as described in claim 3 or 4, which is characterized in that the first film transistor (T1), second thin
Film transistor (T2) is amorphous silicon film transistor, polycrystalline SiTFT or oxide half with third thin film transistor (TFT) (T3)
Conductor thin film transistor.
6. liquid crystal display as described in claim 3 or 4, which is characterized in that the display master control signal (LO) is by sequential control
Device processed or gate driving IC are provided.
7. a kind of liquid crystal display driving method, which is characterized in that include the following steps：
Step S1, liquid crystal display is provided, the liquid crystal display includes：
Multiple sub-pixels (SP) arranged in array, the respectively multi-strip scanning line (1) of the corresponding setting per a line sub-pixel (SP),
The multiple data lines (3) of each row sub-pixel (SP) setting are corresponded to respectively and one of corresponding all sub-pixel (SP) settings shows
Show master control line (5)；
If n, m is positive integer, line n m row sub-pixel (SP) is corresponding to be electrically connected nth bar scan line (1), m datas
Line (3) and the display master control line (5)；The nth bar scan line (1) is used for transmission nth bar scanning signal (G (n)), and described
M data lines (3) are used for transmission m datas signal (D (m)), and the display master control line (5) is used for transmission display master control signal
(LO)；
Each sub-pixel (SP) includes storage capacitance (Cst), liquid crystal capacitance (Clc), first film transistor (T1), second
Thin film transistor (TFT) (T2) and third thin film transistor (TFT) (T3)；For line n m row sub-pixel (SP), the first film crystal
The grid for managing (T1) is electrically connected nth bar scan line (1), and source electrode is electrically connected m data lines (3), and drain electrode is electrically connected and deposits
Storing up electricity holds the one end of (Cst) and the source electrode of the second thin film transistor (TFT) (T2)；The grid of second thin film transistor (TFT) (T2) is electrical
The display master control line (5) is connected, drain electrode is electrically connected one end of liquid crystal capacitance (Clc) and the source of third thin film transistor (TFT) (T3)
Pole；The grid of the third thin film transistor (TFT) (T3) is electrically connected the display master control line (5), drain electrode via a phase inverter (F)
It is electrically connected the other end of the liquid crystal capacitance (Clc) and is electrically connected public electrode (Vcom)；
Step S2, into the charging stage, successively to every scan line (1) write-in scanning signal (G (n)), each row sub-pixel is controlled
(SP) first film transistor (T1) in is opened, and data-signal (D (m)) charges line by line to storage capacitance (Cst), with this
Meanwhile the second thin film transistor (TFT) (T2) in all sub-pixels (SP) of display master control signal (LO) control is closed, third is thin
Film transistor (T3) is opened, and by third thin film transistor (TFT) (T3) short circuit, holding is not filled at the both ends of the liquid crystal capacitance (Clc)
Electricity condition so that picture shows black, realizes black plug；
Step S3, described after storage capacitance (Cst) charging complete in all sub-pixels (SP) into the disposable display stage
Show that master control signal (LO) controls the second thin film transistor (TFT) (T2) opening in all sub-pixels (SP), third thin film transistor (TFT)
(T3) it closes, the storage capacitance (Cst) charges to liquid crystal capacitance (Clc) so that picture is normally shown.
8. liquid crystal display driving method as claimed in claim 7, which is characterized in that the first film transistor (T1),
Second thin film transistor (TFT) (T2) and third thin film transistor (TFT) (T3) are N-type TFT；The scanning signal (G (n)) is
High potential single pulse signal, the display master control signal (LO) is in first scanning signal (G (1)) to the last item scanning signal
The grade of (G (last)) keeps low potential during passing, and is changed into height after the last item scanning signal (G (last)) is acted on
Current potential.
9. liquid crystal display driving method as claimed in claim 7, which is characterized in that the first film transistor (T1),
Second thin film transistor (TFT) (T2) and third thin film transistor (TFT) (T3) are P-type TFT；The scanning signal (G (n)) is
Low potential single pulse signal, the display master control signal (LO) is in first scanning signal (G (1)) to the last item scanning signal
The grade of (G (last)) keeps high potential during passing, and is changed into after the last item scanning signal (G (last)) is acted on low
Current potential.
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| CN111179866A (en) * | 2018-11-12 | 2020-05-19 | 奇景光电股份有限公司 | Liquid crystal display device |
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| WO2023019574A1 (en) * | 2021-08-20 | 2023-02-23 | 京东方科技集团股份有限公司 | Shift register, scan driver circuit, and display device |
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