CN105334651B - Liquid crystal display, display device and public electrode voltages adjusting method - Google Patents
Liquid crystal display, display device and public electrode voltages adjusting method Download PDFInfo
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- CN105334651B CN105334651B CN201510891125.2A CN201510891125A CN105334651B CN 105334651 B CN105334651 B CN 105334651B CN 201510891125 A CN201510891125 A CN 201510891125A CN 105334651 B CN105334651 B CN 105334651B
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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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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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
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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
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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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
- G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
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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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
- G09G3/3666—Control of matrices with row and column drivers using an active matrix with the matrix divided into sections
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0204—Compensation of DC component across the pixels in flat panels
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3614—Control of polarity reversal in general
Abstract
The invention discloses a kind of liquid crystal displays, the liquid crystal display is provided with the second pixel unit, and the positive-negative polarity voltage by neutralizing adjacent second pixel unit obtains an equal threshold voltage, by after the mean value Voltage Feedback to operational amplifier to be supplied to one actual public electrode voltages of public electrode, and meet positive voltage-public electrode voltages=public electrode voltages-negative voltage, avoid the liquid crystal display from flashing (flicker) phenomenon occur.Simultaneously because the liquid crystal display divides into multiple regions that each Self-controlled can be achieved namely the different public electrode voltages are provided to different regions, therefore full screen not flashing without dead angle may be implemented.Invention additionally discloses a kind of display device and a kind of public electrode voltages adjusting methods.
Description
Technical field
The present invention relates to technical field of liquid crystal display more particularly to a kind of liquid crystal displays, a kind of display device and one kind
Public electrode voltages adjusting method.
Background technique
In recent years, liquid crystal display (Liquid Crystal Display, LCD) gradually spreads people's lives
In.The liquid crystal display panel of important component as liquid crystal display mainly includes array substrate, color membrane substrates, Yi Jiwei
Liquid crystal molecule between array substrate and color membrane substrates.Liquid crystal display panel makes liquid by the orientation of electric field controls liquid crystal molecule
The transmissivity of LCD panel changes, to realize display function.In liquid crystal display panel, the electricity of liquid crystal molecule is controlled
It is to be determined by the voltage difference between pixel electrode and public electrode, but due to the presence of parasitic capacitance, grid signal
Will lead to the voltage of pixel electrode when closed, there are Δ V before and after jumpingPDeviation (feed-through effect), be
Guarantee the display quality of liquid crystal display panel, the voltage of all pixels electrode existing voltage deviation Δ before and after jumping
VPIt should be consistent.
But in liquid crystal display panel, due to the delay of resistance capacitance, the grid that is transmitted on a grid line
Signal can be distorted along transmission direction, so as to cause transmission direction of the voltage along grid signal on grid line of pixel electrode
Postpone.And the voltage generally loaded on public electrode be it is identical, so as to cause each picture in entire liquid crystal display panel
Voltage deviation Δ V on plain unitPInconsistent, there is the problems such as film flicker in turn in liquid crystal display panel, and this phenomenon is big
It is more obvious in the LCD of size.
Now, common solution is by adjusting public electrode voltages, i.e. VCOM voltage, to meet positive voltage-
VCOM=VCOM- negative voltage so that flicker level can be preferably minimized, but increases LCM (LCD Module, liquid crystal in this way
Show mould group) working hour of operation and difficulty.Further, since the charging effect of the intermediate region of screen and areas at both sides it is different (namely
It is to say, the charging effect of pixel unit of pixel unit and proximal end positioned at grid line distal end is different), then feed-through is imitated
Should be also different, due to VCOM voltage only one, often take the display effect for guaranteeing intermediate region and sacrifice two side areas
The method of display effect so causes intermediate region flashing lower, and two sides flash still more serious situation.
Summary of the invention
Technical problem to be solved by the present invention lies in a kind of liquid crystal display is provided, can not only avoid occurring full frame
Curtain flashing, and due to can precisely track liquid crystal charging voltage, it is not influenced by liquid crystal cells aging, improves reliability.
In addition, the present invention also provides a kind of display devices using the liquid crystal display.
In addition, the present invention also provides a kind of public electrode voltages adjusting methods applied to the liquid crystal display.
To achieve the goals above, embodiment of the present invention adopts the following technical scheme that
There is provided a kind of liquid crystal display, the liquid crystal display includes: grid drive chip, data driving chip, a plurality of
The grid line and a plurality of data line being connect with the data driving chip being connect with the grid drive chip, it is a plurality of along row side
It intersects to the grid line of extension and a plurality of data line extended along column direction；
The liquid crystal display includes multiple public electrode voltages regulatory regions being arranged along the line direction and multiple
With the one-to-one operational amplifier of public electrode voltages regulatory region, each public electrode voltages regulatory region includes
At least two arrange adjacent and the first pixel unit being arranged in array and at least two the second adjacent pixel units；Each operation
The first all pixel unit in the output end output public electrode voltages to corresponding public electrode voltages regulatory region of amplifier
Public electrode and at least two the second adjacent pixel units public electrode；
Each second pixel unit includes first film transistor, pixel electrode and the second thin film transistor (TFT), institute
The signal input part for stating the second thin film transistor (TFT) is connected to the pixel electrode, is located in the same public electrode voltages regulatory region
At least two the second adjacent pixel units the second thin film transistor (TFT) signal output end be connected after be connected to together pair
The positive input terminal for the operational amplifier answered；
The a plurality of grid line includes zero row grid line and the first row grid line, and the first of second pixel unit is thin
The grid of film transistor is connected to the zero row grid line, and the grid of second thin film transistor (TFT) is connected to the first row
Grid line, the grid drive chip gradually send a signal to the zero row grid line and the first row grid line.
Preferably, the negative input end of the operational amplifier is connected to the output end of the operational amplifier.
Preferably, each first pixel unit includes thin film transistor (TFT), public electrode and pixel electrode, described thin
Film transistor includes the grid that the grid drive chip is connected to by other grid lines in addition to the zero row grid line
Pole is connected to the signal input part of the data driving chip by the data line and is connected to first pixel unit
The signal output end of pixel electrode.
Preferably, the thin film transistor (TFT) of the first film transistor of first pixel unit and second pixel unit
Signal input part be source electrode, the film of the first film transistor of first pixel unit and second pixel unit is brilliant
The signal output end of body pipe is drain electrode；
Alternatively, the thin film transistor (TFT) of the first film transistor of first pixel unit and second pixel unit
Signal input part is drain electrode, the film crystal of the first film transistor of first pixel unit and second pixel unit
The signal output end of pipe is source electrode.
Preferably, the signal input part of second thin film transistor (TFT) is source electrode, the signal of second thin film transistor (TFT)
Output end is drain electrode；Alternatively, the signal input part of second thin film transistor (TFT) is drain electrode, the letter of second thin film transistor (TFT)
Number output end is source electrode.
Preferably, each public electrode voltages regulatory region includes that 2n arranges the first picture that is adjacent and being arranged in array
Plain unit and 2n the second adjacent pixel units, n positive integer.
Preferably, the operational amplifier is integrated in the data driving chip.
In addition, also providing a kind of display device, including liquid crystal display described in any of the above embodiments.
In addition, also providing a kind of public electrode voltages adjusting method, it is applied to liquid crystal display described in any of the above embodiments,
When liquid crystal display is shown, grid drive chip transmits voltage signal to zero row grid line, makes to own
The first film transistor of second pixel unit is connected, and multiple data lines charge to second pixel unit；
After charging complete, the grid drive chip disconnects the voltage signal for being sent to the zero row grid line, and passes
It send the voltage signal to the first row grid line, the second thin film transistor (TFT) of all second pixel units is connected, is located at
All second pixel units of the same public electrode voltages regulatory region are connected simultaneously by second thin film transistor (TFT)
An equal threshold voltage is exported, and the equal threshold voltage is sent to the positive input terminal of the operational amplifier；
The output end of the operational amplifier provides public electrode voltages to the corresponding public electrode voltages regulatory region
The public electrode of interior all first pixel units and the public electrode of second pixel unit.
Compared to the prior art, the invention has the following advantages:
Liquid crystal display of the present invention is provided with the second pixel unit, and by neutralizing adjacent the second pixel list
The positive-negative polarity voltage of member obtains equal threshold voltage, by after the mean value Voltage Feedback to operational amplifier to be supplied to public electrode
One actual public electrode voltages, and meet positive voltage-public electrode voltages=public electrode voltages-negative voltage, avoid institute
It states liquid crystal display and flashing (flicker) phenomenon occurs.Simultaneously because the liquid crystal display divides into multiple can be achieved respectively
The region of regulation namely the different public electrode voltages are provided to different regions, therefore full screen may be implemented without dead
Angle does not flash.Further, when the liquid crystal display carries out the display of each frame image, the mean value can be re-started
Voltage, the equal threshold voltage constantly feeds back to the operation amplifier with the progress of the display program of the liquid crystal display
Therefore device can also track the charging situation of the pixel unit in specific region, not by the shadow of liquid crystal aging precisely in real time
It rings, improves the operational amplifier and the reliability of accurate public electrode voltages is provided.
Display device of the present invention can be avoided screen in display and dodge due to using the liquid crystal display
Bright phenomenon.
Public electrode voltages adjusting method of the present invention, due to using in real time, subregional public electrode voltages
Feedback and supply, therefore can be avoided screen flicker phenomenon.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, attached drawing needed in embodiment will be made below
Simply introduce, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, general for this field
For logical technical staff, without creative efforts, other attached drawings can also be obtained such as these attached drawings.
Fig. 1 is a kind of schematic diagram of liquid crystal display provided in an embodiment of the present invention.
Fig. 2 is a kind of another schematic diagram of liquid crystal display provided in an embodiment of the present invention.
Fig. 3 is a kind of schematic diagram of the first pixel unit of liquid crystal display provided in an embodiment of the present invention.
Fig. 4 is a kind of schematic diagram of the second pixel unit of liquid crystal display provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
For ease of description, may be used herein such as " ... under ", " ... below ", "lower", " ... on ", "upper"
Spaces relative terms are waited to describe the relationship of an elements or features and another (a little) elements or features as illustrated in the drawing.
It is appreciated that be referred to as in another element or layer "upper", " being connected to " or " being couple to " another element when an element or layer or
When layer, it can directly on another element or layer, be directly connected to or be couple to another element or layer, or there may be occupy
Between element or layer.
It is appreciated that terminology used here is merely to description specific embodiment, is not intended to limit the present invention.Herein
In use, clearly stating unless the context otherwise, otherwise singular " one " and "the" are also intended to including plural form.Further
Ground, when used in this manual, term " includes " and/or "comprising" show the feature, entirety, step, element and/or
The presence of component, but the presence that is not excluded for other one or more features, entirety, step, element, component and/or combination thereof or
Increase.Specification subsequent descriptions are to implement better embodiment of the invention, and so the description is of the invention general to illustrate
For the purpose of principle, the range that is not intended to limit the invention.Protection scope of the present invention is when view appended claims institute defender
Subject to.
Fig. 1 and Fig. 2 are please referred to, the embodiment of the present invention provides a kind of liquid crystal display, comprising: grid drive chip
(Gate IC) 10, data driving chip (Source IC) 20, a plurality of grid line and multiple data lines.The a plurality of grid line and
The a plurality of data line intersects to form multiple pixel units, that is to say, that two grid lines of arbitrary neighborhood and appoint
Two data lines for anticipating adjacent surround a pixel unit.As shown in Figure 1, a plurality of gate lines G 0, G1, G2 ...
Gn extends along line direction (i.e. horizontal direction shown in Fig. 1), along column direction (the vertical side i.e. shown in FIG. 1 perpendicular to horizontal direction
To) be alternatively arranged, a plurality of described data line S1, S2 ... Sn-1, Sn extends along column direction, is alternatively arranged along line direction.It is a plurality of
The grid line and a plurality of data line intersect to form multiple pixel units namely multiple pixel units in array
Distribution.In the present embodiment, the gate lines G 0 is between the data driving chip 20 and gate lines G 1, that is, the grid
The adjacent data driving chip 20 of line G0 and be arranged.
As described in Figure 1, in the present embodiment, the liquid crystal display is along the direction that the grid line extends (namely Fig. 1 institute
The horizontal direction shown) there are the multiple operational amplifiers 50 of setting, at least two column of output end connection of the operational amplifier 50 side by side
The public electrode of the adjacent pixel unit, and public electrode voltages are sent to corresponding public electrode, the data-driven
Chip 20 sends the voltage signal of opposite polarity to the adjacent data line.For example, as shown in Figure 1, the liquid crystal
Display screen includes n public electrode voltages regulatory region, i.e. 1 to the n-th public electrode voltages of the first public electrode voltages regulatory region are adjusted
Area n, wherein n is positive integer.Each public electrode voltages regulatory region includes two adjacent data lines and by adjacent two
The two adjacent column pixel units that two grid lines of data line and arbitrary neighborhood are formed.Multiple operational amplifiers 50 with
Multiple public electrode voltages regulatory regions correspond.For example, the first public electrode voltages regulatory region 1 includes prolonging along data line
The first row pixel unit and secondary series pixel unit that direction is arranged successively are stretched, first row pixel unit is connected to the first row
Data line S1, secondary series pixel unit are connected to the second column data line S2；The connection of operational amplifier 50 is located at described
Corresponding pixel unit in first public electrode voltages regulatory region 1, and public electrode voltages VCOM1 is sent to first row and
The polarity of the public electrode of two column pixel units, pixel unit described in the polarity and secondary series of pixel unit described in first row is opposite
(such as pixel unit described in first row shown in Fig. 1 is positive polarity, and pixel unit described in secondary series is negative polarity).
Similarly, the n-th public electrode voltages regulatory region n includes that is arranged successively and connected along data line extending direction
It the 2n-1 column pixel unit of 2n-1 column data line S2n-1 and is arranged successively along data line extending direction and connects 2n columns
The pixel unit is arranged according to the 2n of line S2n, connection is located at the pixel list in the n-th public electrode voltages regulatory region n
The operational amplifier 50 of member, sends public electrode voltages VCOMn to 2n-1 column and 2n arranges the common electrical of the pixel unit
Pole；And 2n-1 arranges the polarity of the pixel unit and 2n arranges the pixel unit polarity is opposite (such as shown in Fig. 1
2n-1 to arrange the pixel unit be positive polarity, it is negative polarity that 2n, which arranges the pixel unit).
As shown in Figure 1, in the present embodiment, multiple pixel units include the first pixel unit 30 and one being arranged in array
The second pixel unit of row 40.As shown in Fig. 2, first pixel unit is shown for carrying out picture, and the first all pixels
Viewing area 100 is collectively formed in unit 30.The picture that second pixel unit 40 is not involved in the liquid crystal display is shown, that is,
Non-display area is formd along the second pixel unit 40 that the extending direction of the gate lines G 0 arranges, is located at the viewing area
100 periphery, the picture for being not involved in the liquid crystal display are shown, only test the different location for being in the liquid crystal display
The practical charging situation of the different pixels unit at place, therefore the data driving chip 20 can be defeated by a plurality of data line
Enter arbitrary data into second pixel unit 40.For example, the second pixel unit 40 described in the present embodiment is located at institute
It states between viewing area 100 and the data driving chip 20.
Also referring to Fig. 1 and Fig. 3, in the present embodiment, first pixel unit 30 include thin film transistor (TFT) 31, as
Plain electrode 32 and public electrode 33 form liquid crystal capacitance between the pixel electrode 32 and the public electrode 33.The film
Transistor 31 includes grid (Gate), source electrode (Source) and drain electrode (Drain), and the grid passes through described grid line (such as Fig. 1
With gate lines G 1 shown in Fig. 3) it is connected to grid drive chip 10, the source electrode passes through the data line as signal input part
(data line S1 as shown in figures 1 and 3) is connected to the data driving chip 20, and the drain electrode is connected to as signal output end
The pixel electrode 32.Certainly, those skilled in the art can also be according to thin film transistor (TFT) described in specific requirements flexible setting
Signal transmission direction, the drain electrode of thin film transistor (TFT) 31 is as the signal input part, source electrode as the signal as described in selecting
Output end.
Also referring to Fig. 1 and Fig. 4, in the present embodiment, second pixel unit 40 include thin film transistor (TFT) 41, as
Plain electrode 42, public electrode 43 and field effect transistor 44 form liquid between the pixel electrode 42 and the public electrode 43
Brilliant capacitor.The thin film transistor (TFT) 41 includes grid, source electrode and drain electrode, and the grid passes through the grid line (such as Fig. 1 and Fig. 4
Shown gate lines G 0) it is connected to grid drive chip 10, the source electrode passes through described data line (such as Fig. 1 as signal input part
It is connected to the data driving chip 20 with data line S1 shown in Fig. 4), the drain electrode is connected to the picture as signal output end
Plain electrode 42.The field effect transistor 44 includes grid, source electrode and drain electrode, and the grid passes through described grid line (such as Fig. 1
With gate lines G 1 shown in Fig. 4) it is connected to grid drive chip 10, the source electrode is connected to the pixel electricity as signal input part
Pole 42, the drain electrode is as signal output end and other second pixel units 40 in same public electrode voltages regulatory region
Field effect transistor 44 signal output end (drain) connection after be connected to the positive input terminal of operational amplifier 50 together
(+) is located at all second pixel units 40 in same public electrode voltages regulatory region to transmit data to operational amplifier 50
Drain electrode the positive input terminal (+) of operational amplifier 50 is commonly connected to as signal output end.
For example, in the present embodiment, each public electrode voltages regulatory region includes the two adjacent column pictures
Plain unit, the drain electrode for being now placed in two the second pixel units 40 in same public electrode voltages regulatory region are exported as signal
End is commonly connected to the positive input terminal (+) of the operational amplifier 50 after being connected, voltage signal is transferred to the operation
Amplifier 50.The negative input end (-) of the operational amplifier 50 is connected to the output end of operational amplifier 50.For example, connection the
The field of second pixel unit 40 of the second column data line S2 of second pixel unit 40 and connection of one column data line S1
The signal output end of effect transistor 44 is connected, and sends a signal to the positive input terminal (+) of operational amplifier 50 upon connection,
The output end connection of the operational amplifier 50 is located at the public affairs of all pixel units in the first public electrode voltages regulatory region 1
Common electrode.Certainly, those skilled in the art can also be according to thin film transistor (TFT) 41 described in specific requirements flexible setting and the field
The respective signal transmission direction of effect transistor 44, the drain electrode of thin film transistor (TFT) 41 is inputted as the signal as described in selecting
End, source electrode are as the signal output end, and the drain electrode of the field effect transistor 44 is as the signal input part, source electrode conduct
The signal output end.
As shown in Figure 1, in the present embodiment, a plurality of grid line includes zero row gate lines G 0 and the first row grid line
The grid of G1, the thin film transistor (TFT) 41 of second pixel unit 40 are connected to the grid by the zero row gate lines G 0
The grid of driving chip 10, the field effect transistor 44 of second pixel unit 40 is connected by the first row gate lines G 1
To the grid drive chip 10, the grid drive chip 10 gradually sends a signal to the zero row gate lines G 0 and described
The first row gate lines G 1.It should be understood that the meaning described herein for gradually indicating individually to carry out according to scheduled timing.
In the present embodiment, the grid drive chip 10 sends voltage signal to the zero row gate lines G 0 first,
So that the thin film transistor (TFT) 41 of second pixel unit 40 is connected, then the data driving chip 20 passes through a plurality of data
Line charges to the liquid crystal capacitance of all second pixel units 40；After charging complete, the grid drive chip 10, which disconnects, to be passed
Send to the voltage signal of the zero row gate lines G 0, then send voltage signal to the first row gate lines G 1, at this time with institute
The field effect transistor 44 for stating connected all second pixel units 40 of the first row gate lines G 1 is connected, and shares the same common electrical
Second pixel unit 40 of pole tension exports an equal threshold voltage after being connected by the field effect transistor 44 jointly,
And by the mean value Voltage Feedback to the positive input terminal (+) of the operational amplifier 50, the output end of the operational amplifier 50 is mentioned
For the public electrode voltages to the public electrode of corresponding pixel unit.As shown in Figure 1, in the present embodiment, due to liquid crystal
The AC characteristic of driving, therefore the pixel unit needs positive-negative polarity voltage driven, namely in the row direction, is located at same
Two adjacent the second pixel units 40 have opposite polarity in one public electrode voltages regulatory region.The equal threshold voltage is
After two adjacent 40 mutual conductions of the second pixel unit, positive-negative polarity voltage neutralize after numerical value, namely for positive-negative polarity electricity
Median after pressure neutralization.It should be understood that the voltage signal can be first send a sufficiently large voltage (such as
Then grid of the 20V to 30V) to thin film transistor (TFT) retransmits about -5V to -10V to guarantee conducting membrane transistor
Voltage to thin film transistor (TFT) grid to guarantee turn off thin film transistor (TFT).
In an embodiment of the present invention, when the public electrode voltages for being provided to the public electrode meet: positive voltage-
When public electrode voltages=public electrode voltages-negative voltage, it can avoid the liquid crystal display and flashing (flicker) occur now
As.Simultaneously as liquid crystal display can be divided into multiple regions that each Self-controlled public electrode voltages can be achieved namely different public affairs
Common-battery pole tension is provided to different public electrode voltages regulatory regions, therefore can achieve the mesh that entire screen is not in flashing
's.It further, in this embodiment, all can be again to described equal when the liquid crystal display carries out the display of each frame image
Threshold voltage is tested, and with the progress of the display program of the liquid crystal display, the equal threshold voltage can constantly be fed back to
Therefore the operational amplifier 50 can also track the charging of second pixel unit 40 in specific region precisely in real time
Situation is not influenced by liquid crystal aging, is improved the operational amplifier 50 and is provided the reliability of accurate public electrode voltages.
It should be understood that in the present embodiment, transmitting voltage signal to the first row grid in grid drive chip 10
While polar curve G1, the thin film transistor (TFT) 31 of the first pixel unit 30 described in the first row is also turned on, at this time data-driven core
Piece 20 passes through output channel namely the first column data line S1, the second column data line S2 ... 2n-1 column data S2n-1,2n
Column data line S2n charges to the liquid crystal capacitance of the corresponding pixel unit, and the different operational amplifiers 50 is each
The public electrode of the self-corresponding pixel unit provides the public electrode voltages, the liquid crystal capacitance voltage difference of the two ends=liquid
Brilliant unit charging voltage-public electrode voltages, to realize the rotation of liquid crystal.The first pixel unit 30 described in the first row is completed
After charging, the grid drive chip 10 disconnects the voltage signal for being sent to the first row gate lines G 1, transmits voltage signal
To the second row gate lines G 2, the data driving chip 20 passes through a plurality of data line first pixel described in the second row
Unit 30 charges ... and so on, and gradually every one-row pixels are connected by the grid line in the grid drive chip 10
The thin film transistor (TFT) of unit, the data driving chip 20 fill the pixel unit by a plurality of data line
Electricity, the different operational amplifiers 50 provide corresponding, different institutes for the public electrode of pixel unit described in each column
State public electrode voltages, the liquid crystal capacitance voltage difference of the two ends=liquid crystal cells charging voltage-public electrode voltages, to realize
The display of the liquid crystal display is completed in the rotation of liquid crystal.
It should be understood that in the present embodiment, since the negative input end of the operational amplifier 50 is connected to the fortune
The output end of amplifier 50 is calculated, therefore, the operational amplifier 50 is equivalent to voltage follower, when the input voltage of positive input terminal
When becoming larger, the output voltage of the output end is also become larger, then the output voltage of the output end, which becomes larger, will lead to the operation amplifier
The input voltage of the negative input end of device 50 also becomes larger；Otherwise, the output voltage of the output end becomes smaller, and it is flat to be finally reached dynamic
Weighing apparatus.
Further, the operational amplifier 50 can not only be separately provided, and can also be integrated in the data-driven
On chip 20, it can so reduce line complexity, simplify wiring, and reduce the production cost of the liquid crystal display.
Further, the field effect transistor 44 of second pixel unit 40 can aoxidize for thin film transistor (TFT) or metal
Object semiconductor field effect transistor.Certainly, in this embodiment, it is preferred that, the thin film transistor (TFT) is as second pixel
The field effect transistor 44 of unit 40 reduces cost to reduce the production material kind of the liquid crystal display.
As a kind of preferred embodiment, the output end of the operational amplifier 50 provides public electrode voltages and gives 2n column institute
State the public electrode of pixel unit, wherein n is more than or equal in 1 positive integer namely each described public electrode regulatory region
It include the pixel unit of even column.Since the voltage signal of the data driving chip 20 transmission opposite polarity is to adjacent
The data line, therefore be located at the same public electrode regulatory region in all second pixel units 40 pass through the field-effect
After transistor 44 is connected, positive and negative polar voltage is neutralized, and the operational amplifier 50 is able to obtain accurate mean value electricity
Pressure.
The embodiment of the present invention also provides a kind of display device, and the display device is using the liquid crystal in above-described embodiment
Display screen.The display device can be avoided the appearance of scintillation, concrete principle embodiment institute as above when being shown
It states, is not repeated herein.
The embodiment of the present invention also provides a kind of public electrode voltages adjusting method, is applied to institute described in embodiment as above
State liquid crystal display, when the liquid crystal display is shown, transmission voltage signal first to the zero row gate lines G 0,
The thin film transistor (TFT) 41 of all second pixel units 40, a plurality of data line is connected in the zero row gate lines G 0
It charges to the liquid crystal capacitance of second pixel unit 40.It is disconnected after charging complete and is sent to the zero row grid
The voltage signal of line G0, voltage send a signal to the first row gate lines G 1, and all institutes are connected in the first row gate lines G 1
The field effect transistor 44 for stating the second pixel unit 40 shares all described the second of the same public electrode voltages
Pixel unit 40 is connected by the field effect transistor 44 and exports equal threshold voltage, and the equal threshold voltage is sent to described
The positive input terminal of operational amplifier 50, the output end of the operational amplifier 50 provide the public electrode voltages to corresponding institute
State the public electrode of pixel unit.
The same of the field effect transistor 44 of all second pixel units 40 is connected in the first row gate lines G 1
When, the thin film transistor (TFT) of the first pixel unit 30 described in the first row is also turned on, and the data driving chip 20 passes through more
Data line described in item sends a signal to the first pixel unit 30 described in the first row to drive it to be shown.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (9)
1. a kind of liquid crystal display, which is characterized in that the liquid crystal display include: grid drive chip, data driving chip,
The a plurality of grid line being connect with the grid drive chip and a plurality of data line being connect with the data driving chip, a plurality of edge
The grid line and a plurality of data line extended along column direction that line direction extends intersect；
The liquid crystal display includes multiple public electrode voltages regulatory regions being arranged along the line direction and multiple and institute
The one-to-one operational amplifier of public electrode voltages regulatory region is stated, each public electrode voltages regulatory region includes at least
Two arrange adjacent and the first pixel unit being arranged in array and at least two the second adjacent pixel units；Each operation amplifier
The public affairs of the first all pixel units in the output end output public electrode voltages to corresponding public electrode voltages regulatory region of device
The public electrode of common electrode and at least two the second adjacent pixel units；
Each second pixel unit includes first film transistor, pixel electrode and the second thin film transistor (TFT), and described
The signal input part of two thin film transistor (TFT)s is connected to the pixel electrode, in the same public electrode voltages regulatory region extremely
The signal output end of second thin film transistor (TFT) of few two adjacent second pixel units is connected to corresponding together after being connected
The positive input terminal of operational amplifier；
The a plurality of grid line includes zero row grid line and the first row grid line, and the first film of second pixel unit is brilliant
The grid of body pipe is connected to the zero row grid line, and the grid of second thin film transistor (TFT) is connected to the first row grid
Line, the grid drive chip gradually send a signal to the zero row grid line and the first row grid line.
2. liquid crystal display as described in claim 1, which is characterized in that the negative input end of the operational amplifier is connected to institute
State the output end of operational amplifier.
3. liquid crystal display as claimed in claim 2, which is characterized in that each first pixel unit includes film crystalline substance
Body pipe, public electrode and pixel electrode, the thin film transistor (TFT) include by other grid in addition to the zero row grid line
The signal that polar curve is connected to the grid of the grid drive chip, is connected to the data driving chip by the data line is defeated
Enter end and is connected to the signal output end of the pixel electrode of first pixel unit.
4. liquid crystal display as claimed in claim 3, which is characterized in that the first film transistor of first pixel unit
Signal input part with the thin film transistor (TFT) of second pixel unit is source electrode, and the first film of first pixel unit is brilliant
The signal output end of the thin film transistor (TFT) of body pipe and second pixel unit is drain electrode；
Alternatively, the signal of the thin film transistor (TFT) of the first film transistor of first pixel unit and second pixel unit
Input terminal is drain electrode, the first film transistor of first pixel unit and the thin film transistor (TFT) of second pixel unit
Signal output end is source electrode.
5. liquid crystal display as described in claim 1, which is characterized in that the signal input part of second thin film transistor (TFT) is
Source electrode, the signal output end of second thin film transistor (TFT) are drain electrode；
Alternatively, the signal input part of second thin film transistor (TFT) is drain electrode, the signal output end of second thin film transistor (TFT)
For source electrode.
6. liquid crystal display as described in claim 1, which is characterized in that each public electrode voltages regulatory region includes
2n arranges the first pixel unit and 2n adjacent and be arranged in array the second adjacent pixel unit, n positive integer.
7. liquid crystal display as described in claim 1, which is characterized in that the operational amplifier is integrated in the data-driven
On chip.
8. a kind of display device, which is characterized in that including such as described in any item liquid crystal displays of claim 1-7.
9. a kind of public electrode voltages adjusting method, which is characterized in that be applied to such as the described in any item liquid crystal of claim 1-7
Display screen,
When liquid crystal display is shown, grid drive chip transmits voltage signal to zero row grid line, makes all second
The first film transistor of pixel unit is connected, and multiple data lines charge to second pixel unit；
After charging complete, the grid drive chip disconnects the voltage signal for being sent to the zero row grid line, and transmits institute
Voltage signal is stated to the first row grid line, the second thin film transistor (TFT) of all second pixel units is connected, is located at same
All second pixel units of a public electrode voltages regulatory region are connected and are exported by second thin film transistor (TFT)
One equal threshold voltage, and the equal threshold voltage is sent to the positive input terminal of the operational amplifier；
The output end of the operational amplifier provides institute in public electrode voltages to the corresponding public electrode voltages regulatory region
The public electrode for first pixel unit having and the public electrode of second pixel unit.
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| CN107123408B (en) * | 2017-06-22 | 2019-08-30 | 深圳市华星光电技术有限公司 | Public voltage generating circuit and liquid crystal display |
| US10395614B2 (en) | 2017-06-22 | 2019-08-27 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Common voltage generating circuit and LCD |
| CN108682401B (en) * | 2018-03-19 | 2021-05-18 | Oppo广东移动通信有限公司 | Liquid crystal display screen public voltage control method, circuit, equipment and medium |
| CN108803172B (en) * | 2018-06-29 | 2021-08-10 | 上海中航光电子有限公司 | Array substrate, display panel and display device |
| CN109509446B (en) * | 2018-12-19 | 2021-06-04 | 惠科股份有限公司 | Display module and display device |
| CN110133926B (en) * | 2019-04-04 | 2020-12-29 | 惠科股份有限公司 | Display panel and display device |
| CN112327530A (en) * | 2020-12-01 | 2021-02-05 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display device |
| CN113327564A (en) * | 2021-05-31 | 2021-08-31 | 惠科股份有限公司 | Voltage control method of liquid crystal electrode, display panel and display device |
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