CN107369424A - A kind of common electric voltage compensation circuit, compensation method and display device - Google Patents
A kind of common electric voltage compensation circuit, compensation method and display device Download PDFInfo
- Publication number
- CN107369424A CN107369424A CN201710778594.2A CN201710778594A CN107369424A CN 107369424 A CN107369424 A CN 107369424A CN 201710778594 A CN201710778594 A CN 201710778594A CN 107369424 A CN107369424 A CN 107369424A
- Authority
- CN
- China
- Prior art keywords
- unit
- public electrode
- signal
- common electric
- electric voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012216 screening Methods 0.000 claims abstract description 70
- 238000001514 detection method Methods 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 2
- 235000018734 Sambucus australis Nutrition 0.000 claims 1
- 244000180577 Sambucus australis Species 0.000 claims 1
- OGFXBIXJCWAUCH-UHFFFAOYSA-N meso-secoisolariciresinol Natural products C1=2C=C(O)C(OC)=CC=2CC(CO)C(CO)C1C1=CC=C(O)C(OC)=C1 OGFXBIXJCWAUCH-UHFFFAOYSA-N 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 4
- 201000005569 Gout Diseases 0.000 description 23
- 239000000758 substrate Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0267—Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The embodiment of the present invention provides a kind of common electric voltage compensation circuit, compensation method and display device, is related to display technology field, can carry out effective compensation to common electric voltage.The common electric voltage compensation circuit includes first waveform screening unit, the second waveform screening unit, addition of waveforms unit and compensating unit.First waveform screening unit is used for from the feedback signal of public electrode, filters out the gated sweep signal being coupled in the feedback signal；Second waveform screening unit is used for from the feedback signal of public electrode, filters out and is coupled in data drive signal in the feedback signal；Addition of waveforms unit is used to the waveform of gated sweep signal and data drive signal being overlapped, and exports to compensating unit；Compensating unit is additionally operable to the signal exported according to addition of waveforms unit, and thermal compensation signal is exported to public electrode.Above-mentioned common electric voltage compensation circuit is used to compensate common electric voltage.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of common electric voltage compensation circuit, compensation method and display dress
Put.
Background technology
Display, such as (Thin Film Transistor Liquid Crystal Display, film are brilliant by TFT-LCD
Body pipe-liquid crystal display) a kind of panel display apparatus is used as, because it has small volume, low in energy consumption, radiationless and cost of manufacture
The features such as relatively low, and be applied to more and more among high-performance display field.
Public electrode and pixel electrode are provided with TFT-LCD, the electric field control formed by public electrode and pixel electrode
Liquid crystal molecule processed enters horizontal deflection, to reach the purpose for showing different grey menus.But in the prior art, TFT-LCD is being shown
During picture, the common electric voltage on public electrode can fluctuate because some factors influence, so as to cause liquid crystal point
Occur deviation between the yawing moment and preset direction of son, and then cause display picture flicker (Flicker), green light occur
(Greenish), crosstalk (Crosstalk) etc. is bad.Reduce the yield of display effect and product.
The content of the invention
Embodiments of the invention provide a kind of common electric voltage compensation circuit, compensation method and display device, can be to public
Voltage carries out effective compensation.
To reach above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：
The one side of the embodiment of the present invention, there is provided a kind of common electric voltage compensation circuit, including first waveform screening unit,
Two waveform screening units, addition of waveforms unit and compensating unit；It is first waveform screening unit connection public electrode, described
Addition of waveforms unit；The first waveform screening unit is used for from the feedback signal of the public electrode, filters out and is coupled in
Gated sweep signal in the feedback signal；The second waveform screening unit connects the public electrode, the addition of waveforms
Unit；The second waveform screening unit is used for from the feedback signal of the public electrode, filters out and is coupled in the feedback letter
Data drive signal in number；The addition of waveforms unit is also connected with compensating unit；The addition of waveforms unit is used for the grid
The waveform of pole scanning signal and the data drive signal is overlapped, and is exported to the compensating unit；The compensating unit
It is also connected with the public electrode, the compensating unit is used for the signal exported according to the addition of waveforms unit, to described public
Electrode exports thermal compensation signal.
Preferably, the addition of waveforms unit includes in-phase adder；The first waveform screening unit and described second
Waveform screening unit is connected with the in-phase input end of the in-phase adder；The output end of the in-phase adder and the benefit
Unit is repaid to be connected.
Preferably, the first waveform screening unit includes the first bandpass filter；The second waveform screening unit bag
Include the second bandpass filter；First bandpass filter or second bandpass filter include first resistor, second resistance,
3rd resistor, the 4th resistance, the 5th resistance, the first electric capacity, the second electric capacity and the first operational amplifier；The first resistor
First end is connected with the public electrode, and the second end is connected with the first end of second electric capacity；Second electric capacity
Second end is grounded；The first end of first electric capacity connects the second end of the first resistor, the second end of first electric capacity
It is connected with the in-phase input end of first operational amplifier；The first end of the second resistance connects first computing and put
The in-phase input end of big device, the second end ground connection；The first end of the 3rd resistor connects the reverse of first operational amplifier
Input, the second end ground connection；The first end of 4th resistance is connected with the second end of the first resistor, the second end and institute
The output end for stating the first operational amplifier is connected；The first end of 5th resistance is anti-phase with first operational amplifier
Input is connected, and the second end is connected with the output end of first operational amplifier.
It is further preferred that the resistance of the resistance in first bandpass filter is more than in second bandpass filter
The resistance of resistance.
Preferably, the first waveform screening unit connects the portion with grid line in the public electrode with overlapping area
Point；The second waveform screening unit connects the part with data wire in the public electrode with overlapping area.
Preferably, the compensating unit includes the second operational amplifier；The in-phase input end of second operational amplifier
Reference voltage terminal is connected, inverting input connects the addition of waveforms unit, the output end connection of second operational amplifier
The public electrode.
Preferably, in addition to detection unit, the detection unit connect supply voltage end and second operational amplifier
Operating voltage end；The detection unit is used for the undulating value for detecting current common electric voltage on the public electrode, and when fluctuation
When value is more than or equal to predetermined threshold value, by the work electricity of the voltage output at the supply voltage end to second operational amplifier
Pressure side.
Preferably, the detection unit includes time schedule controller.
The another aspect of the embodiment of the present invention, there is provided a kind of display device, including display panel and as described above
Anticipate a kind of common electric voltage compensation circuit；Public electrode, the public electrode and the common electrical are provided with the display panel
Pressure compensation circuit is connected.
The another aspect of the embodiment of the present invention, there is provided one kind is using any one common electric voltage compensation circuit as described above
The method compensated to common electric voltage, methods described include：First waveform screening unit from the feedback signal of public electrode,
Filter out the gated sweep signal being coupled in the feedback signal；Feedback letter of the second waveform screening unit from the public electrode
In number, filter out and be coupled in data drive signal in the feedback signal；Addition of waveforms unit is by the gated sweep signal and institute
The waveform for stating data drive signal is overlapped, and is exported to compensating unit；Compensating unit is defeated according to the addition of waveforms unit
The signal gone out, thermal compensation signal is exported to the public electrode.
The embodiment of the present invention provides a kind of common electric voltage compensation circuit, compensation method and display device.From the foregoing, should
First waveform screening unit in common electric voltage compensation circuit can be received by gated sweep signal and believed with the gated sweep
Number frequency similar in low-frequency noise.And the second waveform screening unit can be received by data drive signal and driven with the data
High-frequency noise similar in the frequency of dynamic signal.On this basis, in the signal that compensating unit receives, above-mentioned first waveform is passed through
Screening unit and the second waveform screening unit have filtered above-mentioned low-frequency noise and high-frequency noise so that the benefit of compensating unit output
Signal is repaid mainly to be made up of gated sweep signal and data drive signal, therefore during compensating common electric voltage, can
Avoid the influence of above-mentioned low-frequency noise and high-frequency noise to compensation effect.Specifically compensation process is：When public electrode receives
After above-mentioned thermal compensation signal, gated sweep signal and data drive signal in the thermal compensation signal can be respectively by common electric voltages
Gated sweep signal and data drive signal are offset, so as to avoid gated sweep signal and data drive signal to public affairs
Interference caused by common voltage, improves the stability of common electric voltage, and then reduces the several of the bad generation of the display such as flicker, green light
Rate.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of common electric voltage compensation circuit provided in an embodiment of the present invention；
Fig. 2 is signal FB in Fig. 1G, signal FBD, signal GOUT, the oscillogram of signal DATA and remaining noise；
Fig. 3 is a kind of concrete structure schematic diagram of the common electric voltage compensation circuit shown in Fig. 1；
Fig. 4 is the signal GOUT filtered out by the first waveform screening unit shown in Fig. 1 or Fig. 3；
Fig. 5 is the signal DATA filtered out by the second waveform screening unit shown in Fig. 1 or Fig. 3；
Fig. 6 is the signal waveforms after the addition of waveforms cell processing shown in Fig. 1 or Fig. 3；
Fig. 7 is another concrete structure schematic diagram of the common electric voltage compensation circuit shown in Fig. 1；
Fig. 8 is a kind of common electric voltage compensation method flow chart provided in an embodiment of the present invention.
Reference：
01- common electric voltage compensation circuits；02- public electrodes；10- first waveform screening units；The screening of the waveforms of 11- second is single
Member；The operational amplifiers of 101- first；20- addition of waveforms units；201- in-phase adders；30- compensating units；The computings of 102- second
Amplifier；40- detection units.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of common electric voltage compensation circuit 01, and the common electric voltage compensation circuit 01 is used for input
Common electric voltage VCOM to public electrode 02 is compensated.Wherein, above-mentioned public electrode 02 is made in the display surface of display device
On plate.
Specifically, above-mentioned common electric voltage compensation circuit 01 is as shown in figure 1, including first waveform screening unit 10, the second ripple
Shape screening unit 11, addition of waveforms unit 20 and compensating unit 30.
Wherein, first waveform screening unit 10 connects public electrode 02 and above-mentioned addition of waveforms unit 20.The first wave
Shape screening unit 10 is used for from the feedback signal FB of public electrode 02, filters out the grid being coupled in feedback signal FB and sweeps
Retouch signal GOUT.Wherein, gated sweep signal GOUT frequency is in KHZ ranks.
Based on this, it is preferred that by above-mentioned first waveform screening unit 10 connect in the public electrode 02 with grid line GL (Gate
Line) there is the part of overlapping area, i.e., by the first signal lead 03, will there is overlapping face with grid line GL in public electrode 02
Long-pending part is connected with above-mentioned first waveform screening unit 10.In the case, the public electrode 02 of the opening position is by grid
Line GL influence is more obvious.So that public electrode 02 is screened single by above-mentioned first signal lead 03 to first waveform
The first sub- feedback signal FB that member 10 providesGThe gated sweep signal GOUT of middle coupling is stronger.
In the case, as shown in Fig. 2 the first sub- feedback signal FB exported by above-mentioned first signal lead 03GMiddle bag
Include gated sweep signal GOUT and with the gated sweep signal GOUT frequencies similar in low-frequency noise F1.Pass through above-mentioned first wave
Shape screening unit 10 can filter above-mentioned low-frequency noise F1, to filter out above-mentioned gated sweep signal GOUT.
It should be noted that with grid line GL there is overlapping area to refer in above-mentioned public electrode 02, the substrate of display panel
There is the above-mentioned public electrode 02 and grid line GL that different layer is set, when there is overlapping area with grid line GL in public electrode 02 on substrate
When, some friendship of orthographic projection of the public electrode 02 on the underlay substrate and orthographic projections of the grid line GL on underlay substrate
It is folded.
On this basis, the second waveform screening unit 11 connection public electrode 02 and above-mentioned addition of waveforms unit 20.Should
Second waveform screening unit 11 is used for from the feedback signal FB of public electrode 02, filters out and is coupled in number in feedback signal FB
According to drive signal DATA.Wherein, data drive signal DATA frequency is in MHZ or GHZ.
Based on this, it is preferred that above-mentioned second waveform screening unit 11 connect in the public electrode 02 with data wire DL (Data
Line) there is the part of overlapping area, i.e., it is overlapping by having in public electrode 02 with data wire DL by secondary signal lead 04
The part of area is connected with above-mentioned second waveform screening unit 11.In the case, the public electrode 02 of the opening position by
Data wire DL influence is more obvious.So that public electrode 02 is sieved by above-mentioned secondary signal lead 04 to the second waveform
The second sub- feedback signal FB that menu member 11 providesDThe data drive signal DATA of middle coupling is stronger.
In the case, as shown in Fig. 2 the second sub- feedback signal FB exported by above-mentioned secondary signal lead 04DMiddle bag
Include data drive signal DATA and with data drive signal DATA frequencies similar in high-frequency noise F2.Pass through above-mentioned second ripple
Shape screening unit 11 can filter above-mentioned high-frequency noise F2, to filter out above-mentioned data drive signal DATA.
It should be noted that refer in above-mentioned public electrode 02 with part that data wire DL has overlapping area, display surface
On the underlay substrate of plate have different layer set above-mentioned public electrode 02 and data wire DL, when in public electrode 02 with data wire DL
During with overlapping area, orthographic projection of the public electrode 02 on the underlay substrate and positive throwings of the data wire DL on underlay substrate
Some is overlapping for shadow.
On this basis, above-mentioned addition of waveforms unit 20 is also connected with compensating unit 30.The addition of waveforms unit 20 is used for will
Gated sweep signal GOUT and data drive signal DATA waveform are overlapped, and are exported to the compensating unit 30.Now, should
The signal that compensating unit 30 receives mainly is made up of gated sweep signal GOUT and data drive signal DATA, and almost without it
His noise.
In addition, the compensating unit 30 is also connected with public electrode 02.Common electrical is provided with specifically, working as in above-mentioned display panel
During polar curve, above-mentioned compensating unit 30 can be connected by public electrode wire with the public electrode 02.In the case, compensation is single
Member 30 is used for the signal exported according to addition of waveforms unit 20, and thermal compensation signal is exported to public electrode 02.
Through analysis shows, the signal on grid line and data wire can produce coupled noise on public electrode 02, so as to cause
Common electric voltage VCOM stability on public electrode 02 declines.From the foregoing, first waveform screening unit 10 can receive
As gated sweep signal GOUT and with gated sweep signal GOUT frequency similar in low-frequency noise F1.And the second waveform screens
Unit 11 can receive as data drive signal DATA and with data drive signal DATA frequency similar in high-frequency noise
F2.On this basis, in the signal that compensating unit 30 receives, sieved by the above-mentioned waveform of first waveform screening unit 10 and second
Menu member 11 has filtered above-mentioned low-frequency noise F1 and high-frequency noise F2 respectively so that the thermal compensation signal master of the compensating unit 30 output
To be made up of gated sweep signal GOUT and data drive signal DATA, therefore during compensating common electric voltage VCOM,
The influence of above-mentioned low-frequency noise F1 and high-frequency noise F2 to compensation effect can be avoided.
Specifically compensation process is：After public electrode 02 receives above-mentioned thermal compensation signal, the grid in the thermal compensation signal
Scanning signal GOUT and data drive signal DATA can be respectively by the gated sweep signal GOUT sums in common electric voltage VCOM
Offset according to drive signal DATA, so as to avoid gated sweep signal GOUT and data drive signal DATA to common electrical
Interference caused by pressing VCOM, improves common electric voltage VCOM stability, and then reduces the bad generation of the display such as flicker, green light
Probability.
The concrete structure of unit in Fig. 1 is described in detail below.
Specifically, above-mentioned first waveform screening unit 10 includes the first bandpass filter, the second waveform screening unit 11 is wrapped
Include the second bandpass filter.
Based on this, above-mentioned first bandpass filter or the second bandpass filter, include first resistor R1, the as shown in Figure 3
Two resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the first electric capacity C1, the second electric capacity C2 and the first computing are put
Big device 101.
Wherein, first resistor R1 first end is connected with public electrode 02.In the case, when first waveform screens list
Member 10 receives above-mentioned first sub- feedback signal FBGWhen, have with grid line GL in the first resistor R1 first end and public electrode 02
The part for having overlapping area is connected.In addition, first resistor R1 the second end is connected with the second electric capacity C2 first end.Second
Electric capacity C2 the second end ground connection.
First electric capacity C1 first end connection first resistor R1 the second end, the first electric capacity C1 the second end and the first computing
The in-phase input end of amplifier 101 is connected.
Second resistance R2 first end connects the in-phase input end of above-mentioned first operational amplifier 101, the second end ground connection.
3rd resistor R3 first end connects the reverse input end of above-mentioned first operational amplifier 101, the second end ground connection.
4th resistance R4 first end is connected with first resistor R1 the second end, the second end and the first operational amplifier
101 output end is connected.
5th resistance R5 first end is connected with the inverting input of the first operational amplifier 101, the second end and first
The output end of operational amplifier 101 is connected.
In the case, from the foregoing, being filtered out by first waveform screening unit 10 (i.e. the first bandpass filter)
Gated sweep signal GOUT frequency in KHZ ranks；Sieved by the second waveform screening unit 11 (i.e. the second bandpass filter)
The data drive signal DATA selected frequency is in MHZ or GHZ.In order that obtain the waveform of first waveform screening unit 10 and second
Screening unit 11 can filter out the signal that frequency is different stage, it is preferred that the resistance of the resistance in the first bandpass filter
More than the resistance of resistance in the second bandpass filter.So that the first bandpass filter can by the larger resistance of resistance,
Filter out as shown in Figure 4, gated sweep signal GOUT of the frequency rank in KHZ.Again such that the second bandpass filter can
By the less resistance of resistance, the data drive signal DATA of frequency rank as shown in Figure 5 in MHZ or GHZ is filtered out.
Based on this, the present invention is not limited the resistance size of above-mentioned resistance, and those skilled in the art can be according to display
The different size of panel is adjusted to the resistance of above-mentioned resistance, as long as can ensure the resistance of the resistance in the first bandpass filter
Value is more than the resistance of resistance in the second bandpass filter.
In addition, above-mentioned is only the illustration to the first bandpass filter and the second bandpass filter structures.The present invention
The structure of the bandpass filter of offer is not limited to that.
On this basis, as shown in figure 3, above-mentioned addition of waveforms unit 20 includes in-phase adder 201.In the case,
The waveform screening unit 11 of first waveform screening unit 10 and second is connected with the in-phase input end of the in-phase adder 201.
Based on this, when the structure of the waveform screening unit 11 of first waveform screening unit 10 and second is same as above, the first waveform
The first operation amplifier in the output end of the first operational amplifier 101 in screening unit 10 and the second waveform screening unit 11
In-phase input end of the output end of device 101 with the in-phase adder 201 is connected.
In addition, the output end of the in-phase adder 201 is connected with compensating unit 30.The in-phase adder 201 it is reverse
Input end grounding.
In the case, by in-phase adder 201 as shown in fig. 6, first waveform screening unit 10 can be filtered out
Gated sweep signal GOUT and the data drive signal DATA that filters out of the second waveform screening unit 11 enter when phase is identical
Row superposition, obtains signal FB_OUT.
On this basis, above-mentioned compensating unit 30 includes the second operational amplifier 102.Specifically, second operation amplifier
The in-phase input end connection reference voltage terminal Vb of device 102.Reference voltage terminal Vb is used to export the common electric voltage for being not affected by interference
VCOM。
The inverting input of second operational amplifier 102 connects above-mentioned addition of waveforms unit 20.Based on this, when the waveform
When the structure of superpositing unit 20 is as described above, the inverting input of second operational amplifier 102 and above-mentioned in-phase adder 201
Output end be connected.
In addition, the output end connection public electrode 02 of above-mentioned second operational amplifier 102.The public affairs are provided with specifically, working as
When being additionally provided with public electrode wire on the display panel of common electrode 02, the output end of above-mentioned second operational amplifier 102 can lead to
Above-mentioned public electrode wire is crossed with public electrode 02 to be connected.
In the case, the signal FB_ that above-mentioned in-phase adder 201 can be exported by the second operational amplifier 102
OUT carries out being overlapped to obtain common electric voltage reversely and with the common electric voltage VCOM for being not affected by interference of reference voltage terminal Vb outputs
VCOM thermal compensation signal Vc.Based on this, after thermal compensation signal Vc is exported to public electrode 02 by public electrode wire, compensation is believed
The common electric voltage that will can be interfered by reverse gated sweep signal GOUT and data drive signal DATA in number Vc
Positive gated sweep signal GOUT and data drive signal DATA in VCOM are offset respectively, so that public electrode
Common electric voltage VCOM and the common electric voltage VCOM for being not affected by interference that reference voltage terminal Vb is exported after being compensated on 02 is equal or near
Patibhaga-nimitta etc., and then improve the purpose of common electric voltage VCOM stability.
It should be noted that above-mentioned first operational amplifier 101 uses short cut technique in figure 3, and the second operational amplifier
102 depict specific chip pin in figure 3.
Based on this, through analysis shows, when common electric voltage VCOM is interfered and when fluctuating, if fluctuating range compared with
Small, influence to display effect is simultaneously little, for being not easy to capture above-mentioned exception in watching process.In the case, such as
Compensating unit 30 in the above-mentioned common electric voltage compensation circuit 01 of fruit still compensates to common electric voltage VCOM, for display effect
Lifting can not be observed that and the compensation process can increase power consumption by user.
In order to solve the above problems, it is preferred that the common electric voltage compensation circuit 01 also includes detection unit as shown in Figure 7
40。
Specifically, the operating voltage end of the detection unit 40 connection supply voltage end AVDD and the second operational amplifier 102
VDD.The detection unit 40 is used to detecting the undulating value of current common electric voltage VCOM on public electrode 02, and be more than when undulating value or
During equal to predetermined threshold value, by above-mentioned supply voltage end AVDD voltage output to the operating voltage end of the second operational amplifier 102
VDD.In the case, the second operational amplifier 102 is started working, and the common electric voltage VCOM on public electrode 02 is mended
Repay.
Wherein, the present invention is not limited the concrete numerical value of above-mentioned predetermined threshold value, and those skilled in the art can be according to need
It is set.When the sensitivity of the smaller compensating unit 30 of the numerical value of predetermined threshold value is higher, on the contrary it is smaller.
Preferably, above-mentioned detection unit 40 includes time schedule controller (TCON).So, without additionally setting above-mentioned inspection
Survey unit 40, it is only necessary to the detection function of the detection unit 40 is integrated in above-mentioned time schedule controller, so as to be advantageous to carry
The wiring space of high display panel non-display area.
The embodiment of the present invention provides a kind of display device, and the display device is any including display panel and as described above
A kind of common electric voltage compensation circuit 01.Public electrode 02 is provided with the display panel, the public electrode 02 and above-mentioned common electrical
Pressure compensation circuit 01 is connected.Wherein, public electrode 02 and the connection procedure of above-mentioned common electric voltage compensation circuit 01 are same as above,
Here is omitted.In addition, above-mentioned display device has the identical of common electric voltage compensation circuit 01 provided with previous embodiment
Beneficial effect, here is omitted.
It should be noted that in embodiments of the present invention, above-mentioned display device can specifically include liquid crystal display device, example
Such as display device can be display, TV, DPF, mobile phone or any product with display function of tablet personal computer
Or part.
The embodiment of the present invention provides one kind using any one common electric voltage compensation circuit 01 as described above to common electrical
The method that pressure VCOM is compensated, as shown in figure 8, this method includes：
S101, first waveform screening unit 10 as shown in Figure 1 filter out coupling from the feedback signal of public electrode 02
Gated sweep signal GOUT in the feedback signal.
S102, the second waveform screening unit 11 filter out from the feedback signal of public electrode 02 and are coupled in the feedback letter
Data drive signal DATA in number.
It should be noted that the present invention is not limited above-mentioned steps S101 and step S102 sequencing.When above-mentioned
First sub- feedback signal FBGWith the second sub- feedback signal FBDEffectiveness it is identical or approximately the same when, it is preferred that it is above-mentioned
Step S101 and step S102 can be carried out simultaneously.
S103, addition of waveforms unit 20 are folded gated sweep signal GOUT and data drive signal DATA waveform
Add, and export to compensating unit 30.
The signal FB_OUT that S104, compensating unit 30 export according to addition of waveforms unit 20, export and mend to public electrode 02
Repay signal Vc.
It should be noted that when the structure of unit in above-mentioned steps is as shown in Figure 3, the course of work of unit
Same as above, here is omitted.Carried in addition, the above-mentioned method compensated to common electric voltage VCOM has with previous embodiment
The identical beneficial effect of common electric voltage compensation circuit 01 of confession, here is omitted.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
- A kind of 1. common electric voltage compensation circuit, it is characterised in that including first waveform screening unit, the second waveform screening unit, Addition of waveforms unit and compensating unit；The first waveform screening unit connection public electrode, the addition of waveforms unit；The first waveform screening unit is used In the feedback signal from the public electrode, the gated sweep signal being coupled in the feedback signal is filtered out；The second waveform screening unit connects the public electrode, the addition of waveforms unit；The second waveform screening is single Member is used for from the feedback signal of the public electrode, filters out and is coupled in data drive signal in the feedback signal；The addition of waveforms unit is also connected with compensating unit；The addition of waveforms unit is used for the gated sweep signal and institute The waveform for stating data drive signal is overlapped, and is exported to the compensating unit；The compensating unit is also connected with the public electrode, and the compensating unit is used for what is exported according to the addition of waveforms unit Signal, thermal compensation signal is exported to the public electrode.
- 2. common electric voltage compensation circuit according to claim 1, it is characterised in that the addition of waveforms unit includes same phase Adder；The first waveform screening unit and the second waveform screening unit and the in-phase input end phase of the in-phase adder Connection；The output end of the in-phase adder is connected with the compensating unit.
- 3. common electric voltage compensation circuit according to claim 1, it is characterised in that the first waveform screening unit includes First bandpass filter；The second waveform screening unit includes the second bandpass filter；First bandpass filter or second bandpass filter include first resistor, second resistance, 3rd resistor, the 4th Resistance, the 5th resistance, the first electric capacity, the second electric capacity and the first operational amplifier；The first end of the first resistor is connected with the public electrode, and the second end is connected with the first end of second electric capacity Connect；The second end ground connection of second electric capacity；The first end of first electric capacity connects the second end of the first resistor, the second end of first electric capacity and described the The in-phase input end of one operational amplifier is connected；The first end of the second resistance connects the in-phase input end of first operational amplifier, the second end ground connection；The first end of the 3rd resistor connects the reverse input end of first operational amplifier, the second end ground connection；The first end of 4th resistance is connected with the second end of the first resistor, the second end and first operation amplifier The output end of device is connected；The first end of 5th resistance is connected with the inverting input of first operational amplifier, the second end and described the The output end of one operational amplifier is connected.
- 4. common electric voltage compensation circuit according to claim 3, it is characterised in that the electricity in first bandpass filter The resistance of resistance is more than the resistance of resistance in second bandpass filter.
- 5. common electric voltage compensation circuit according to claim 1, it is characterised in that the first waveform screening unit connection There is the part of overlapping area in the public electrode with grid line；The second waveform screening unit connects the part with data wire in the public electrode with overlapping area.
- 6. common electric voltage compensation circuit according to claim 1, it is characterised in that the compensating unit includes the second computing Amplifier；The in-phase input end connection reference voltage terminal of second operational amplifier, inverting input connect the addition of waveforms list Member, the output end of second operational amplifier connect the public electrode.
- 7. common electric voltage compensation circuit according to claim 6, it is characterised in that also including detection unit, the detection Unit connects supply voltage end and the operating voltage end of second operational amplifier；The detection unit is used to detect the public affairs The undulating value of current common electric voltage in common electrode, and when undulating value is more than or equal to predetermined threshold value, by the supply voltage end Voltage output to the operating voltage end of second operational amplifier.
- 8. common electric voltage compensation circuit according to claim 7, it is characterised in that the detection unit includes SECO Device.
- A kind of 9. display device, it is characterised in that the common electrical including display panel and as described in claim any one of 1-8 Press compensation circuit；Public electrode is provided with the display panel, the public electrode is connected with the common electric voltage compensation circuit.
- 10. a kind of common electric voltage compensation circuit using as described in claim any one of 1-8 compensates to common electric voltage Method, it is characterised in that methods described includes：First waveform screening unit filters out the gated sweep being coupled in the feedback signal from the feedback signal of public electrode Signal；Second waveform screening unit filters out from the feedback signal of the public electrode and is coupled in data drive in the feedback signal Dynamic signal；The waveform of the gated sweep signal and the data drive signal is overlapped by addition of waveforms unit, and is exported to benefit Repay unit；The signal that compensating unit exports according to the addition of waveforms unit, thermal compensation signal is exported to the public electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710778594.2A CN107369424B (en) | 2017-08-31 | 2017-08-31 | A kind of common voltage compensation circuit, compensation method and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710778594.2A CN107369424B (en) | 2017-08-31 | 2017-08-31 | A kind of common voltage compensation circuit, compensation method and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107369424A true CN107369424A (en) | 2017-11-21 |
| CN107369424B CN107369424B (en) | 2019-12-03 |
Family
ID=60312141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710778594.2A Expired - Fee Related CN107369424B (en) | 2017-08-31 | 2017-08-31 | A kind of common voltage compensation circuit, compensation method and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107369424B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107993628A (en) * | 2018-01-26 | 2018-05-04 | 京东方科技集团股份有限公司 | Common electric voltage compensation circuit, its compensation method, display panel and display device |
| CN108665841A (en) * | 2018-05-09 | 2018-10-16 | 京东方科技集团股份有限公司 | Common electrode voltage compensation circuit and display device |
| CN111243538A (en) * | 2020-02-14 | 2020-06-05 | 京东方科技集团股份有限公司 | Common voltage compensation method and device for display panel, display panel and device |
| CN111627365A (en) * | 2019-02-27 | 2020-09-04 | 精工爱普生株式会社 | Voltage supply circuit, liquid crystal device, electronic apparatus, and moving object |
| CN111862896A (en) * | 2019-04-25 | 2020-10-30 | 瑞鼎科技股份有限公司 | Common voltage compensation device and method applied to display driving circuit |
| CN113316887A (en) * | 2019-03-08 | 2021-08-27 | 深圳市柔宇科技股份有限公司 | Panel assembly and electronic device |
| CN115202513A (en) * | 2022-07-28 | 2022-10-18 | 惠科股份有限公司 | Compensation circuit, touch display screen and electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101452131A (en) * | 2007-11-30 | 2009-06-10 | 瀚宇彩晶股份有限公司 | Device with built-in capacitance coupling effect compensating function and method |
| CN101770743A (en) * | 2010-02-21 | 2010-07-07 | 友达光电股份有限公司 | Display capable of inhibiting ripples of common voltage |
| CN103048818A (en) * | 2011-10-11 | 2013-04-17 | 株式会社日本显示器东 | Liquid crystal display device |
-
2017
- 2017-08-31 CN CN201710778594.2A patent/CN107369424B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101452131A (en) * | 2007-11-30 | 2009-06-10 | 瀚宇彩晶股份有限公司 | Device with built-in capacitance coupling effect compensating function and method |
| CN101770743A (en) * | 2010-02-21 | 2010-07-07 | 友达光电股份有限公司 | Display capable of inhibiting ripples of common voltage |
| CN103048818A (en) * | 2011-10-11 | 2013-04-17 | 株式会社日本显示器东 | Liquid crystal display device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107993628A (en) * | 2018-01-26 | 2018-05-04 | 京东方科技集团股份有限公司 | Common electric voltage compensation circuit, its compensation method, display panel and display device |
| CN108665841A (en) * | 2018-05-09 | 2018-10-16 | 京东方科技集团股份有限公司 | Common electrode voltage compensation circuit and display device |
| CN111627365A (en) * | 2019-02-27 | 2020-09-04 | 精工爱普生株式会社 | Voltage supply circuit, liquid crystal device, electronic apparatus, and moving object |
| CN111627365B (en) * | 2019-02-27 | 2023-08-08 | 精工爱普生株式会社 | Voltage supply circuit, liquid crystal device, electronic apparatus, and moving object |
| CN113316887A (en) * | 2019-03-08 | 2021-08-27 | 深圳市柔宇科技股份有限公司 | Panel assembly and electronic device |
| CN111862896A (en) * | 2019-04-25 | 2020-10-30 | 瑞鼎科技股份有限公司 | Common voltage compensation device and method applied to display driving circuit |
| CN111243538A (en) * | 2020-02-14 | 2020-06-05 | 京东方科技集团股份有限公司 | Common voltage compensation method and device for display panel, display panel and device |
| CN111243538B (en) * | 2020-02-14 | 2022-08-09 | 京东方科技集团股份有限公司 | Common voltage compensation method and device for display panel, display panel and device |
| CN115202513A (en) * | 2022-07-28 | 2022-10-18 | 惠科股份有限公司 | Compensation circuit, touch display screen and electronic equipment |
| US11966541B2 (en) | 2022-07-28 | 2024-04-23 | HKC Corporation Limited | Compensation circuit, touch screen, and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107369424B (en) | 2019-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107369424A (en) | A kind of common electric voltage compensation circuit, compensation method and display device | |
| CN102200857B (en) | Touch signal scanning frequency determining method of touch panel | |
| DE102014113800B4 (en) | Touch detection system, method for controlling the same and user interface with the system | |
| CN102455812B (en) | Touch display device | |
| CN102096509B (en) | Touch panel and method for reducing noise of common voltage coupling on touch panel | |
| US9140922B2 (en) | Display device and electronic unit | |
| CN103338581A (en) | Flexible printed circuit for connecting touch screen and liquid crystal display device using the same | |
| CN104036743A (en) | Circuit for generating gamma reference voltage, array substrate and display device | |
| CN104156106B (en) | Contactor control device and its driving method | |
| CN106782397A (en) | The compensation method of display panel and its common electric voltage, display device | |
| US10241629B2 (en) | Filtering circuit and touch display device | |
| CN106909252B (en) | touch screen frequency point calibration device and method, touch screen and display device | |
| DE102009046177A1 (en) | Touch data generator | |
| CN104793366A (en) | Liquid crystal panel subjected to bright point repair and bright point repair method thereof | |
| CN104020916B (en) | Capacitive touch screen drive detection method and device and electronic device | |
| CN104932767B (en) | Array substrate, manufacturing method, touch display panel and touch display device | |
| US9740349B2 (en) | Touch driving apparatus, touch driving method and touch display system | |
| CN105739768A (en) | Touch display panel and touch display equipment | |
| CN106384578A (en) | Protection circuit, protection method and display against working abnormity of GOA panel | |
| CN106940500A (en) | Array base palte, display panel, the driving method of display device and array base palte | |
| CN105913816A (en) | Display panel, driving method thereof and display device | |
| CN103794186B (en) | display device and compensation method | |
| CN105929994B (en) | A kind of display panel and its gesture awakening method and display device | |
| CN105159511B (en) | A kind of self-tolerant embeds touch panel and detection method | |
| US20190377448A1 (en) | Display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191203 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |