CN108520723A - Liquid crystal display panel and liquid crystal display - Google Patents
Liquid crystal display panel and liquid crystal display Download PDFInfo
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- CN108520723A CN108520723A CN201810331449.4A CN201810331449A CN108520723A CN 108520723 A CN108520723 A CN 108520723A CN 201810331449 A CN201810331449 A CN 201810331449A CN 108520723 A CN108520723 A CN 108520723A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 59
- 230000005540 biological transmission Effects 0.000 claims abstract description 92
- 230000008901 benefit Effects 0.000 claims abstract description 7
- 239000010409 thin film Substances 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 11
- 238000012423 maintenance Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 3
- 230000001808 coupling effect Effects 0.000 abstract description 21
- 230000002159 abnormal effect Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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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
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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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13454—Drivers integrated on the active matrix substrate
-
- 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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Optics & Photonics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The embodiment of the invention discloses a kind of liquid crystal display panels, including：GOA circuits comprising the GOA unit of multistage interconnection；Low potential transmission line is electrically connected respectively with every grade of GOA unit to transmit low-potential voltage to corresponding GOA unit, and the low potential transmission line is equipped with detecting voltage point；Low potential provides unit, provides low potential normal voltage and exports；Compensating unit, its first input end provides unit with low potential and is electrically connected, its second input terminal is electrically connected with detecting voltage point to detect the fluctuation of voltage on low potential transmission line, its output end is electrically connected with the low potential transmission line, and the compensating unit is according to the voltage control output at detecting voltage point to the voltage of low potential transmission line.The embodiment of the invention also discloses a kind of liquid crystal displays.Using the present invention, have the advantages that prevent low potential transmission line from causing liquid crystal display panel display abnormal due to capacitance coupling effect.
Description
Technical field
The present invention relates to display technology fields, more particularly to a kind of liquid crystal display panel and liquid crystal display.
Background technology
The advantages that liquid crystal display panel is high, cheap, easy to carry with its display quality, become mobile communication equipment,
The display panel of PC, TV etc..Liquid crystal display panel actuation techniques are gradually intended to use GOA circuits, GOA circuits that can simplify at present
The production process of panel display board saves engagement (bonding) technique in horizontal scanning line direction, can promote production capacity, reduce
Product cost, while the integrated level that can promote display panel is allowed to be more suitable for making narrow frame or Rimless shows product, it is full
The vision of sufficient modern people is pursued.
GOA circuits, i.e. Gate Driver on Array technologies, that is, utilize available liquid crystal display panel Array systems
Gate driving circuit is produced on underlay substrate by journey, realizes the type of drive progressively scanned to scan line.Each GOA electricity
Road includes the GOA unit of multistage interconnection, and the schematic diagram of N grades of GOA units is (N is the integer more than 1) as shown in Figure 1, N grades
GOA unit includes pull-up control unit 110, pull-up unit 120, drop-down maintenance unit 130, drop-down unit 140 etc., wherein low
Current potential transmission line low-potential voltage Vss gives drop-down maintenance unit 130, the drop-down unit 140 of N grades of GOA units, described low
Potential voltage Vss is generally -6V.When the output signal G (N+1) of N+1 grades of GOA units (next stage of N grades of GOA units) is
When high level, the low-potential voltage Vss on low potential transmission line drags down Q (N) point current potentials, at this point, thin in pull-up unit 120
Film transistor T21 is closed, meanwhile, the thin film transistor (TFT) T31 conductings in drop-down unit 140, to the output of N grades of GOA units
Voltage G (N) is low-potential voltage Vss, is -6V, the rechargeable thin film transistors in viewing area to control liquid crystal display panel
It closes, and the leakage current of rechargeable thin film transistors is minimum (referring to the black line marked position erected in Fig. 2).
However, since low-potential voltage needs all grades of GOA for being conveyed to GOA circuits by low potential transmission line mono-
Member, to which low potential transmission line can be very long, general low potential transmission line extends longitudinally, thus can be across other lateral circuits
Either the neighbouring circuit that other are longitudinally extended is when the voltage generation on the circuit that those are longitudinally extended or the circuit being laterally extended
When voltage when variation or on the common electrode of the colorized optical filtering on piece of liquid crystal display panel changes, low potential transmission
Line is influenced by capacitance coupling effect, and low-potential voltage Vss thereon also can accordingly generate variation, such as low potential is made to transmit
Low-potential voltage Vss on line, which is increased, either reduces (the perpendicular black line in Fig. 2 is moved right or is moved to the left), such as by-
6V becomes -5.5V or -6.5V, the low-potential voltage also respective change for causing GOA unit to export, low when GOA unit output
When potential voltage is increased or reduced (when especially increasing), lead to the rechargeable thin film crystal in the viewing area of liquid crystal display panel
The leakage current of pipe will increase, and causes the rechargeable thin film transistors in viewing area to be unable to completely close, influences liquid crystal display panel
Display performance may cause display abnormal.
Invention content
Technical problem to be solved of the embodiment of the present invention is, provides a kind of liquid crystal display panel.It can prevent low potential
Transmission line causes liquid crystal display panel display abnormal due to capacitance coupling effect.
In order to solve the above-mentioned technical problem, first aspect present invention embodiment provides a kind of liquid crystal display panel, including：
GOA circuits comprising the GOA unit of multistage interconnection, the output end of every grade of GOA unit are electrically connected with scan line, often
Multiple rechargeable thin film transistors are connected in scan line；
Low potential transmission line is electrically connected with every grade of GOA unit mono- to corresponding GOA to transmit low-potential voltage respectively
Member, the low potential transmission line are equipped with detecting voltage point；
Low potential provides unit, provides low potential normal voltage and exports；
Compensating unit, first input end provide unit with low potential and are electrically connected, the second input terminal and detecting voltage point
Electrical connection is to detect the fluctuation of voltage on low potential transmission line, and output end is electrically connected with the low potential transmission line, the benefit
Repay voltage of the unit according to the voltage control output at detecting voltage point to low potential transmission line.
In one embodiment of first aspect present invention, the compensating unit includes operational amplifier, capacitance, the low potential
It provides unit to be electrically connected with the noninverting input of the operational amplifier, the detecting voltage point is electrically connected to the of the capacitance
One end, the second end of the capacitance are electrically connected to the reverse input end of the operational amplifier, the output of the operational amplifier
End is electrically connected with the low potential transmission line.
In one embodiment of first aspect present invention, the compensating unit further includes first resistor and second resistance, described
The second end of capacitance is electrically connected with the first end of first resistor, and the second end of the first resistor is anti-with the operational amplifier
It is electrically connected to input terminal, the first end of the second resistance is electrically connected with the second end of the first resistor, the second resistance
Second end be electrically connected with the output end of the operational amplifier.
In one embodiment of first aspect present invention, the low potential transmission line is longitudinal by the first end of liquid crystal display panel
Extend to opposite second end.
In one embodiment of first aspect present invention, the first end of the LCD panel is equipped with PCB, the compensating unit
On the PCB, the output end of the compensating unit is electrically connected with the first end of the low potential transmission line.
In one embodiment of first aspect present invention, the detecting voltage point is located at the low potential transmission line far from first
The side at end.
In one embodiment of first aspect present invention, the liquid crystal display panel further includes sequence controller, the sequential
Controller includes that the low potential provides unit.
In one embodiment of first aspect present invention, the quantity of the GOA circuits is two, two GOA circuits point
Not Wei Yu the liquid crystal display panel opposite sides, the quantity of the low potential transmission line is two, the compensating unit
Quantity is two, and two low potential transmission lines and two compensating units correspond to two GOA circuits and set respectively
It sets, the low potential provides unit and provides low potential normal voltage respectively to two compensating units.
In one embodiment of first aspect present invention, each GOA unit include pull-up control unit, pull-up unit, under
Maintenance unit and drop-down unit, the low-potential voltage line is drawn to be electrically connected respectively with the drop-down unit, drop-down maintenance unit.
Second aspect of the present invention embodiment provides a kind of liquid crystal display, including backlight module and above-mentioned liquid crystal display
Panel, the liquid crystal display panel are located at the top of the backlight module.
Implement the embodiment of the present invention, has the advantages that：
Since the liquid crystal display panel includes compensating unit, first input end and the low potential of compensating unit provide unit
Electrical connection, the second input terminal of compensating unit are electrically connected with detecting voltage point to detect the fluctuation of voltage on low potential transmission line,
The output end of compensating unit is electrically connected with the low potential transmission line, and the compensating unit is according to the voltage control at detecting voltage point
Voltage of the system output to low potential transmission line.To pass through low potential electricity on detecting voltage point detecting real-time low potential transmission line
The variation of pressure, compensating unit adjustment output are realized to the size of the low-potential voltage of low potential transmission line to low potential transmission line
Since capacitance coupling effect causes the variation of low-potential voltage to compensate, to maintain low-potential voltage on low potential transmission line
It is permanent to stablize, so as to so that the leakage current of rechargeable thin film transistors is small as possible, not interfere with the display of liquid crystal display panel
Can, display will not be caused abnormal.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the principle schematic of N grades of GOA units in prior art GOA circuits；
Fig. 2 is prior art rechargeable thin film transistors current-voltage change schematic diagram；
The schematic diagram of Fig. 3 one embodiment of the invention liquid crystal display panels；
Fig. 4 is the physical circuit figure of one embodiment of the invention compensating unit；
Shown by reference numeral：
110- pull-up control units；120- pull-up units；130- pulls down maintenance unit；140- drop-down units；200- liquid crystal
Display panel；210-GOA circuits；211-GOA units；220- low potentials provide unit；230- compensating units；240-PCB；250-
Viewing area；251- rechargeable thin film transistors；252- pixel capacitances；260- non-display areas；VS- low potential normal voltages；The low electricity of VR-
Position voltage；SL- scan lines；Lvs- low potential transmission lines；Lfb- feedback lines.
Specific implementation mode
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 describes, 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, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
The term " comprising " and " having " occurred in present specification, claims and attached drawing and their any changes
Shape, it is intended that cover and non-exclusive include.Such as contain the process of series of steps or unit, method, system, product or
Equipment is not limited to the step of having listed or unit, but further includes the steps that optionally not listing or unit or optional
Ground further includes for the intrinsic other steps of these processes, method, product or equipment or unit.In addition, term " first ", " the
Two " and " third " etc. are and to be not intended to describe specific sequence for distinguishing different objects.
The embodiment of the present invention provides a kind of liquid crystal display panel, refers to Fig. 3, and the liquid crystal display panel 200 includes GOA
Circuit 210, low potential transmission line Lvs, low potential provide unit 220.
In the present embodiment, the GOA circuits 210 are located at the non-display area 260 of the liquid crystal display panel 200, described
GOA circuits 210 include the GOA unit 211 of multistage interconnection, and the GOA unit 211 of specially this grade is mono- with the GOA of upper level respectively
Member 211 and the GOA unit 211 of next stage are electrically connected, include per level-one GOA unit 211 pull-up control unit, pull-up unit, under
Maintenance unit and drop-down unit etc. are drawn, since pull-up control unit, pull-up unit, drop-down maintenance unit, drop-down unit etc. are this
Field circuit known to a person of ordinary skill in the art and structure, repeat no more here.In the present embodiment, the liquid crystal display panel
200 viewing area 250 is equipped with majority scan line SL, the output end of every grade of GOA unit 211 respectively with a scan line SL
It is electrically connected, multiple rechargeable thin film transistors 251, the grid of each rechargeable thin film transistors 251 is electrically connected on every scan line SL
It being electrically connected with corresponding scan line SL, the drain electrode of each rechargeable thin film transistors 251 is electrically connected with corresponding pixel capacitance 252,
The source electrode of each rechargeable thin film transistors is electrically connected with corresponding data line (not shown).In the present embodiment, pass through GOA
211 output voltage of unit gives scan line SL, so control the unlatching for being connected to the rechargeable thin film transistors 251 on scan line SL or
Person closes, and then controls pixel capacitance 252 and charge (unlatching of rechargeable thin film transistors 251) or pixel capacitance 252 is maintained to power on
Lotus (closing of rechargeable thin film transistors 251).
In the present embodiment, the low potential transmission line Lvs also is located at the non-display area of the liquid crystal display panel 200
260, the low potential transmission line Lvs are electrically connected respectively with every grade of GOA unit 211 to transmit low-potential voltage VR to corresponding
GOA unit 211.Particularly, the low potential transmission line Lvs respectively with the drop-down maintenance unit of every grade of GOA unit 211, under
Unit electrical connection, every grade of output of GOA unit 211 is drawn to come with the signal for controlling the closing of rechargeable thin film transistors 251 to scan line SL
Low-potential voltage VR on low potential transmission line Lvs, when the low potential transmission line Lvs is not by capacitance coupling effect
Influence when, the low-potential voltage VR on the low potential transmission line Lvs is generally -6V, at this time rechargeable thin film transistors 251
Leakage current is minimum, when the low potential transmission line Lvs is influenced by capacitance coupling effect, the low potential transmission line Lvs
On low-potential voltage VR can change, when low-potential voltage VR can be caused not influenced relatively by capacitance coupling effect increase or drop
It is low, such as become -5.5V (raising) either -6.5V (reduction) etc. can lead at this time when low-potential voltage VR is increased or is reduced
It crosses the output of GOA unit 211 and gives scan line SL, the voltage that scan line SL is transferred to rechargeable thin film transistors 251 is caused also to increase, from
And the leakage current of the rechargeable thin film transistors being closed 251 is caused to increase, cause display abnormal.In order to improve above
Problem, in the present embodiment, the low potential transmission line Lvs are equipped with detecting voltage point D, are detectd in real time by detecting voltage point D
Low-potential voltage VR variations on low potential transmission line Lvs are surveyed, especially because capacitance coupling effect causes the variation of voltage.
In the present embodiment, the low potential provides unit 220 and provides low potential normal voltage VS and export, here,
The low potential normal voltage VS is generally -6V, when low potential transmission line Lvs is not influenced by capacitance coupling effect, institute
Low potential normal voltage VS is stated equal to the low-potential voltage VR transmitted on low potential transmission line Lvs, is generally -6V.
In order to keep the low-potential voltage VR transmitted on low potential transmission line Lvs more stable, capacitance coupling effect pair is reduced
The influence of low-potential voltage VR, in the present embodiment, the liquid crystal display panel 200 further include compensating unit 230, the compensation
Unit 230 is located at the non-display area 260 of the liquid crystal display panel 200, the first input end of the compensating unit 230 and low electricity
Position provides unit 220 and is electrically connected, and the low potential normal voltage VS that unit 220 transmits, the benefit are provided for receiving low potential
The second input terminal for repaying unit 230 is electrically connected with detecting voltage point D with detecting real-time low potential transmission line by feedback line Lfb
The fluctuation of the upper voltages of Lvs, the output end of the compensating unit 230 are electrically connected with the low potential transmission line Lvs, and the compensation is single
Member 230 is according to the voltage control output detected at detecting voltage point D to the low-potential voltage VR of low potential transmission line Lvs, dimension
The stabilization of the low-potential voltage VR transmitted on low potential transmission line Lvs is held, namely maintains the electricity on low potential transmission line Lvs as possible
Pressure is -6V.Here, the voltage at detecting voltage point D is the voltage after low-potential voltage VR is affected.Particularly, when
Due to capacitance coupling effect cause low-potential voltage VR increase when, such as by -6V increase be -5.5V when, the compensating unit 230
The voltage of the voltage namely reception -5.5V at point D is detected by feedback line Lfb receiving voltages, the compensating unit 230 carries out
Compensation, such as the output end of the compensating unit 230 export and become -6.5V from -6V to the voltage of low potential transmission line Lvs, pass through
Capacitance coupling effect on low potential transmission line Lvs is crossed, to make the low-potential voltage VR on low potential transmission line Lvs become quickly
For -6V；When causing low-potential voltage VR to reduce due to capacitance coupling effect, such as when being reduced to -6.5V by -6V, the benefit
The voltage of the voltage namely reception -6.5V at 230 receiving voltage of unit detecting point D is repaid, the compensating unit 230 compensates,
Such as the output end of the compensating unit 230 is exported becomes -5.5V from -6V to the voltage of low potential transmission line Lvs, through too low electricity
Capacitance coupling effect on the transmission line Lvs of position, to make the low-potential voltage VR on low potential transmission line Lvs quickly become -6V.From
And by compensating unit 230, even if low potential transmission line Lvs is influenced by capacitance coupling effect, low potential transmission line Lvs
The low-potential voltage VR of upper transmission tends to be more stable, and liquid crystal display panel is not in that display is abnormal.
Incorporated by reference to referring to Fig. 3 and Fig. 4, in the present embodiment, the compensating unit 230 includes operational amplifier OP, capacitance
C.The low potential provides unit 220 and is electrically connected with the in-phase input end (+) of the operational amplifier OP.The detecting voltage point
D is electrically connected to the first end of the capacitance C by feedback line Lfb, and the second end of the capacitance C is electrically connected to the operation amplifier
The reverse input end (-) of device OP, in this embodiment it is assumed that low potential transmission line Lvs is actually by capacitance coupling effect to electricity
The influence of pressure is Vrippe ', then the voltage at detecting voltage point D is VS+Vrippe ', since feedback line Lfb may also be by electricity
The influence for holding coupling effect or other factors, leading to reach the voltage at the first end of capacitance C can decline with respect to VS+Vrippe '
Subtract, the voltage at the first end of capacitance C is assumed to VS+Vrippe namely impacted voltage by V rippe ' decaying changes at this time
For Vrippe, after capacitance, the voltage at the capacitance C second ends is Vrippe.The output end of the operational amplifier OP
It is electrically connected with the low potential transmission line Lvs.
In the present embodiment, the compensating unit 230 further includes first resistor R1 and second resistance R2, the capacitance C's
Second end is electrically connected with the first end of the first resistor R1, the second end of the first resistor R1 and the operational amplifier OP
Reverse input end (-) electrical connection namely the first resistor R1 be located at the reversed of the capacitance C and operational amplifier OP
Between input terminal, the first end of the second resistance R2 is electrically connected with the second end of the first resistor R1, namely with the fortune
Calculate the reverse input end electrical connection of amplifier OP, the output end of the second end of the second resistance R2 and the operational amplifier OP
Electrical connection, to which the voltage Vout of the operational amplifier OP output ends is：
Vout=VS-Vrippe*R2/R1；
In above formula, R2/R1 is amplification factor, and value may be greater than 1, can also be that can also be equal to 1 less than 1.From
And the virtual voltage transmitted on low potential transmission line Lvs is：VS-Vrippe*R2/R1+Vrippe ', to pass through Vrippe*
R2/R1 causes the influence Vrippe ' of the voltage of low potential transmission line Lvs to compensate capacitance coupling effect, to which operation is put
The voltage of big device OP output ends can make up low potential transmission line Lvs to be influenced by capacitance coupling effect.In order to as far as possible
The value etc. of Vrippe*R2/R1 can be made by many experiments by reducing influence of the capacitance coupling effect to low potential transmission line Lvs
In Vrippe '.
Continuing with referring to Fig. 3, in the present embodiment, the low potential transmission line Lvs by liquid crystal display panel first end
Opposite second end is extended lengthwise into, the first end is the upper end of liquid crystal display panel 200 here, and the second end is liquid
The lower end of LCD panel 200, it is certainly good in turn.The first end of the liquid crystal display panel 200 is equipped with PCB (Printed
Circuit Board, printed circuit board) 240, the PCB240 is flexible printed circuit board, and the compensating unit 230 is located at institute
It states on PCB240, the output end of the compensating unit 230 is electrically connected with the first end of the low potential transmission line Lvs.In this reality
It applies in example, data driver (not shown), the data driver and data line electricity is additionally provided on the PCB240
Connection.
Since the low potential transmission line Lvs is extended longitudinally, the low potential transmission line Lvs length is long, and institute
The output end for stating compensating unit 230 is electrically connected with the first end of the low potential transmission line Lvs, when the detecting voltage point D is leaned on
When the first end of nearly low potential transmission line Lvs, although can accurately detect the first end and electricity of low potential transmission line Lvs at this time
The variation of low-potential voltage VR on circuit between pressure detecting point D, but after the detecting voltage point D of low potential transmission line Lvs
Circuit voltage variation detection it is just less accurate, such situation in order to prevent, in the present embodiment, the detecting voltage point
D is located at the sides of the low potential transmission line Lvs far from first end, is preferably located at second end, and detecting voltage point D can be at this time
Accurately detect that the low-potential voltage VR on low potential transmission line Lvs is generated by the influence of the factors such as capacitance coupling effect
Variation.
In the present embodiment, the liquid crystal display panel 200 further includes sequence controller, and the sequence controller includes institute
It states low potential and unit 220 is provided.In addition, the sequence controller can also provide GOA circuits 210 other required signals,
Such as clock signal etc..
In the present embodiment, the quantity of the GOA circuits 210 is one, is located at the non-aobvious of the left side of the display panel
Show area 260, the low potential transmission line Lvs, feedback line Lfb quantity be one, the quantity of the compensating unit 230 is one
It is a.However, the present invention is not limited thereto, in other embodiments of the invention, the quantity of the GOA circuits can also be two, two
The GOA circuits are located at the opposite sides of the liquid crystal display panel, such as two GOA circuits are located at left side
Non-display area and right side non-display area, the low potential transmission line, feedback line quantity be two, the compensating unit
Quantity is two, and two low potential transmission lines, two feedback lines and two compensating units corresponding two GOA circuits respectively
Setting namely one of GOA circuits correspond to a low potential transmission line, a feedback line and a compensating unit setting, separately
An outer GOA circuit also corresponds to another low potential transmission line, in addition a feedback line and the setting of another compensating unit,
A detecting voltage point is respectively provided on two low potential transmission lines, two detecting voltage points pass through respective feedback line respectively
It is electrically connected to corresponding compensating unit；The low potential provides unit and provides low potential normal voltage respectively to two compensation
Unit.Certainly, in other embodiments of the invention, when there are two GOA circuits, two low potentials can also be set, list is provided
Member, two low potentials provide unit and are located in sequence controller.
In addition, the embodiment of the present invention also provides a kind of liquid crystal display, the liquid crystal display includes backlight module and upper
The liquid crystal display panel stated, the liquid crystal display panel are located at the top of the backlight module.
It should be noted that each embodiment in this specification is described in a progressive manner, each embodiment weight
What point illustrated is all the difference with other embodiments, and the same or similar parts between the embodiments can be referred to each other.
For device embodiments, since it is basically similar to the method embodiment, thus description it is fairly simple, related place referring to
The part of embodiment of the method illustrates.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (10)
1. a kind of liquid crystal display panel, which is characterized in that including：
GOA circuits comprising the GOA unit of multistage interconnection, the output end of every grade of GOA unit are electrically connected with scan line, and every is swept
It retouches and connects multiple rechargeable thin film transistors on line；
Low potential transmission line is electrically connected respectively with every grade of GOA unit to transmit low-potential voltage to corresponding GOA unit, institute
It states low potential transmission line and is equipped with detecting voltage point；
Low potential provides unit, provides low potential normal voltage and exports；
Compensating unit, first input end provide unit with low potential and are electrically connected, and the second input terminal is electrically connected with detecting voltage point
It connects to detect the fluctuation of voltage on low potential transmission line, output end is electrically connected with the low potential transmission line, and the compensation is single
Member is according to the voltage control output at detecting voltage point to the voltage of low potential transmission line.
2. liquid crystal display panel as described in claim 1, which is characterized in that the compensating unit includes operational amplifier, electricity
Hold, the low potential provides unit and is electrically connected with the noninverting input of the operational amplifier, the detecting voltage point electrical connection
To the first end of the capacitance, the second end of the capacitance is electrically connected to the reverse input end of the operational amplifier, the fortune
The output end for calculating amplifier is electrically connected with the low potential transmission line.
3. liquid crystal display panel as claimed in claim 2, which is characterized in that the compensating unit further includes first resistor and
Two resistance, the second end of the capacitance are electrically connected with the first end of first resistor, the second end of the first resistor and the fortune
The reverse input end electrical connection of amplifier is calculated, the first end of the second resistance is electrically connected with the second end of the first resistor,
The second end of the second resistance is electrically connected with the output end of the operational amplifier.
4. the liquid crystal display panel as described in claim 1-3 any one, which is characterized in that the low potential transmission line is by liquid
The first end of LCD panel extends lengthwise into opposite second end.
5. liquid crystal display panel as claimed in claim 4, which is characterized in that the first end of the LCD panel is equipped with PCB,
The compensating unit is located on the PCB, and the output end of the compensating unit and the first end of the low potential transmission line are electrically connected
It connects.
6. liquid crystal display panel as claimed in claim 4, which is characterized in that the detecting voltage point is located at low potential biography
Side of the defeated line far from first end.
7. the liquid crystal display panel as described in claim 1-3 any one, which is characterized in that the liquid crystal display panel also wraps
Sequence controller is included, the sequence controller includes that the low potential provides unit.
8. the liquid crystal display panel as described in claim 1-3 any one, which is characterized in that the quantity of the GOA circuits is
Two, two GOA circuits are located at the opposite sides of the liquid crystal display panel, the quantity of the low potential transmission line
It it is two, the quantity of the compensating unit is two, and two low potential transmission lines and two compensating unit difference
Corresponding two GOA circuits settings, the low potential provide unit and provide low potential normal voltage respectively to two benefits
Repay unit.
9. the liquid crystal display panel as described in claim 1-3 any one, which is characterized in that each GOA unit includes upper
Draw control unit, pull-up unit, drop-down maintenance unit and drop-down unit, the low-potential voltage line single with the drop-down respectively
Member, drop-down maintenance unit electrical connection.
10. a kind of liquid crystal display, which is characterized in that including backlight module and liquid as described in any one of claims 1-9
LCD panel, the liquid crystal display panel are located at the top of the backlight module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810331449.4A CN108520723A (en) | 2018-04-13 | 2018-04-13 | Liquid crystal display panel and liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810331449.4A CN108520723A (en) | 2018-04-13 | 2018-04-13 | Liquid crystal display panel and liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108520723A true CN108520723A (en) | 2018-09-11 |
Family
ID=63432544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810331449.4A Pending CN108520723A (en) | 2018-04-13 | 2018-04-13 | Liquid crystal display panel and liquid crystal display |
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| Country | Link |
|---|---|
| CN (1) | CN108520723A (en) |
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| WO2020244057A1 (en) * | 2019-06-06 | 2020-12-10 | 深圳市华星光电技术有限公司 | Drive circuit, display panel and display apparatus |
| CN114267309A (en) * | 2021-12-25 | 2022-04-01 | 重庆惠科金渝光电科技有限公司 | Public voltage detection circuit, display module and display device |
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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Applicant after: TCL China Star Optoelectronics Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Applicant before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |
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Application publication date: 20180911 |
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