CN109920383A - A kind of common electrode voltage compensating device and method - Google Patents
A kind of common electrode voltage compensating device and method Download PDFInfo
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- CN109920383A CN109920383A CN201711319637.7A CN201711319637A CN109920383A CN 109920383 A CN109920383 A CN 109920383A CN 201711319637 A CN201711319637 A CN 201711319637A CN 109920383 A CN109920383 A CN 109920383A
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Abstract
The invention discloses a kind of common electrode voltage compensating devices, it include: display panel, common electrode signal wire is connected on the outside of the display panel, original common-battery pole tension is output to inside the display panel by the common electrode signal wire, is provided with multiple detecting points and multiple compensation points on the inside of the display panel；Circuit is detected, for detecting the detecting voltage of the detecting point；Processing circuit is detected, the detecting circuit is connected, for obtaining offset voltage according to the detecting voltage and the original common-battery pole tension；Circuit is compensated, the detecting processing circuit is connected, for the offset voltage to be loaded into the compensation point, compensates the common electrode signal wire output end voltage.The present invention detects the variation degree of different location by the way that multiple detecting points and multiple compensation points are arranged on a display panel, corresponds to and compensates, to offset common electrode variation caused by cross-interference issue, raising display effect.
Description
Technical field
The invention belongs to field of liquid crystal panel display, and in particular to a kind of common electrode voltage compensating device and method.
Background technique
In liquid crystal display, the light transmittance that liquid crystal display panel adjusts liquid crystal by electric field shows image.Therefore, liquid
Crystal display includes the display board with multiple liquid crystal cells, for the back light unit to the display board irradiation light and for driving
Move the data drive circuit of these liquid crystal cells, the scan drive circuit and common reference voltage that control liquid crystal cells are opened
To control deflection direction and the deflection angle of liquid crystal molecule in liquid crystal cells.
Since the scan line of liquid crystal panel scanning driving circuit and the data line of data drive circuit are at one layer, public electrode
Layer generally has away line overlap between two layers in cabling, will form parasitism between common electrode layer and scan line in another layer
Parasitic capacitance Cdc is will form between capacitor Cgc and common electrode layer and data line.
Fig. 1 and Fig. 2 are specifically please referred to, Fig. 1 is horizontal crosstalk schematic diagram when existing display panel is shown, Fig. 2 is existing aobvious
Show that the offset of common electrode signal potential generates timing diagram in panel.Since panel itself data line Cdc and scan line Cgc and upper plate are total
The presence of interelectrode parasitic capacitance, the capacitance coupling effect of parasitic capacitance will cause common electrode voltage deviation, and it sets current potential,
That is in Fig. 2 shown in A point, and common electrode voltage returns are greater than one-row pixels to its time for setting current potential and required time are written；Cause
This will cause the problem of panel has horizontal crosstalk under some driving pictures generation, influence the effect that picture is shown.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the present invention provides a kind of common electrode voltage compensating device and
Method.The technical problem to be solved in the present invention is achieved through the following technical solutions:
The embodiment of the invention provides a kind of common electrode voltage compensating devices, comprising: connection is total on the outside of the display panel
Electrode signal line, original common-battery pole tension are output to inside the display panel by the common electrode signal wire, the display
Multiple detecting points and multiple compensation points are provided on the inside of panel；
Circuit is detected, for detecting the detecting voltage of the detecting point；
Processing circuit is detected, the detecting circuit is connected, for according to the detecting voltage and the original common electrode electricity
Pressure obtains offset voltage；
Circuit is compensated, the detecting processing circuit is connected, for the offset voltage to be loaded into the compensation point, is compensated
The common electrode signal wire output end voltage.
In a specific embodiment of the invention, source terminal and the source is arranged on the inside of the display panel in the detecting point
On the inside of extreme opposite end.
In a specific embodiment of the invention, gate terminal is arranged on the inside of the display panel in the detecting point.
In a specific embodiment of the invention, the offset voltage in the compensation circuit is inputted by the common electrode signal wire
To compensation point.
In a specific embodiment of the invention, the detecting point and the compensation point are to be arranged around the display panel
Gold size point.
In a specific embodiment of the invention, the detecting processing circuit includes reversed operational amplifier, the reversed fortune
It calculates the amplifier in connection detecting loop output and the original common electrode voltage output end, the reversed operation is put
Big device output end connects the compensation loop output.
Another embodiment of the present invention provides a kind of common electrode voltage compensating method, comprising:
The detecting voltage of detection detecting point；
Offset voltage is obtained according to the detecting voltage and original common-battery pole tension；
The offset voltage is loaded into compensation point, compensates common electrode signal wire output end voltage.
In a specific embodiment of the invention, source terminal, the source is arranged on the inside of the display panel in the detecting point
On the inside of extreme opposite end and display panel inside gate terminal.
In a specific embodiment of the invention, the offset voltage in the compensation circuit is inputted by the common electrode signal wire
To compensation point.
In a specific embodiment of the invention, the detecting point and the compensation point are to be arranged around the display panel
Gold size point.
Compared with prior art, beneficial effects of the present invention:
For the present invention by the way that multiple detecting points and multiple compensation points are arranged on a display panel, the voltage for detecting different location is inclined
Shifting degree, correspondence compensate, to offset common electrode variation caused by cross-interference issue.
Detailed description of the invention
Fig. 1 is horizontal crosstalk schematic diagram when existing display panel is shown；
Fig. 2 is that the offset of common electrode signal potential generates timing diagram in existing display panel；
Fig. 3 is a kind of common electrode voltage compensating device structural schematic diagram provided in an embodiment of the present invention；
Fig. 4 is reversed operation amplifier circuit schematic diagram provided in an embodiment of the present invention.
Specific embodiment
Further detailed description is done to the present invention combined with specific embodiments below, but embodiments of the present invention are not limited to
This.
Embodiment one
Fig. 3 is referred to, Fig. 3 is a kind of common electrode voltage compensating device structural schematic diagram provided in an embodiment of the present invention, packet
Include: display panel 1 connects common electrode signal wire on the outside of the display panel 1, and original common-battery pole tension is believed by the common electrode
Number line is output to inside the display panel 1, and multiple detecting points 2 and multiple compensation points 3 are provided on the inside of the display panel 1；
Circuit 4 is detected, for detecting the detecting voltage of the detecting point 2；
Processing circuit 5 is detected, the detecting circuit 4 is connected, for according to the detecting voltage and the original common electrode
Voltage obtains offset voltage；
Circuit 6 is compensated, the detecting processing circuit 5 is connected, for the offset voltage to be loaded into the compensation point 3,
Compensate the common electrode signal wire output end voltage.
Display panel 1 includes first substrate, the second substrate with first substrate face, wherein is handed over each other on first substrate
Fork is provided with data line and scan line, and forms pixel electrode in intersection region, and the second substrate entire surface is provided with common electrical
Pole Vcom, and the liquid crystal capacitance and liquid crystal layer filled between pixel electrode and public electrode.It is input to picture in display panel 1
Voltage on element is exported by the interface printed circuit board being arranged on the outside of display panel 1, in a kind of display panel 1, altogether
Electrode is other than the wiring in lower plate, it is also necessary to be connected to upper plate, and the common electrode power supply provided with outside is connect.With upper plate
Common electrode be by mixed with gold or silver conducting resinl, sticked on substrate with dots structure, in this way, can be basic in upper and lower two panels
When fitting, upper and lower plates common electrode is realized and is conductively connected, common electrode is with very wide wiring ring pixel array.
The source of common-battery pole tension is to be provided by outside, therefore need to connect with external, it is however generally that, meeting in scan line and
The outside of data line bunching wiring, in addition several common electrode power-supply wirings and connection terminal.The present invention is by printed circuit board
Interface between Vcom output end and liquid crystal display panel is known as interface printed circuit board, original common-battery pole tension be it is initial it is lossless under
Common-battery pole tension Vcom input voltage, be input to inside display panel 1 by common electrode signal wire.
In conclusion display panel 1 includes scan line and data line, it further include electrically exhausted with the scan line and data line
The common electrode layer of edge will form parasitic capacitance Cgc and described public between the common electrode layer and the scan line
Parasitic capacitance Cdc is will form between electrode layer and the data line, the capacitance coupling effect of this capacitor will cause common electrode electricity
The time required to pressure deviates it and sets current potential, and common electrode voltage returns set greater than one picture element write-in of potential time to it；Cause
This will cause the problem of panel has horizontal crosstalk under some special driving pictures generation.In addition, inventor also found, with
Display mainstream resolution and operating frequency continue to increase, and the influence that panel common electrode is capacitively coupled is also increasing.
In a specific embodiment, the broadside of display panel 1 is gate terminal (Gate), and long side is source terminal
(Source), gate terminal side is provided with Gate COF (Chip On Film), source terminal side is provided with Source
COF.Wherein, the inside surrounding of display panel 1 is arranged in detecting point 2 and compensation point 3.
It further include detecting circuit 4, for detecting the detecting voltage of the detecting point 2；Detecting 4 cabling of circuit is located at detecting point
2 both sides can accurately detect the voltage of detecting 2.
Processing circuit 5 is detected, the detecting circuit 4 is connected, for according to the detecting voltage and the original common electrode
Voltage obtains offset voltage；Original common-battery pole tension is the voltage value of theoretical input, can directly receive voltage from power end
The input of signal, detecting voltage are the voltage acquired from detecting circuit 4, correspond to the voltage that actually enters on cabling, at detecting
Reason circuit 5 calculates the voltage value for needing to compensate according to above-mentioned two input.
Circuit 6 is compensated, the detecting processing circuit 5 is connected, for the offset voltage to be loaded into the compensation point 3,
Compensate the common electrode signal wire output end voltage.The offset voltage that detecting processing circuit 5 is calculated is input to compensation circuit
6, compensation circuit 6 is loaded into position to be compensated to 3 input offset voltage of compensation point, correspondence.
In a specific embodiment of the invention, the detecting point 2 is arranged in the 1 inside source terminal of display panel and described
The end-to-end inside of source electrode.
For source terminal, in the side Source COF, the point that the present embodiment chooses the side is examined as detecting point 2
It surveys, the voltage difference of the side difference point is smaller, therefore can choose any one or more points in the side Source as detecting point
2, corresponding, when compensating, compensation point may be provided at the place close to detecting point 2, carry out voltage by compensation circuit 6
Compensation.For the present embodiment also in anti-terminals side, the i.e. side Source COF opposite end setting detecting point 2, which is the side Source COF
The other end along data line direction, when carrying out cabling, from the shortest one side cabling of opposite ends sub- lateral edge panel side respective path
To the side Source COF.Since when anti-terminals side is detected and compensated, route cabling is longer, and inventor notices that anti-terminals side is any
The detecting voltage difference of point is smaller, and in actual product design, the optional shorter point of line of taking away carries out detecting compensation, for example,
Anti- terminals side is chosen close to the point at the end Gate as detecting point 2 or compensation point 3,4 cabling of detecting circuit of the point is successively along anti-
Terminals side, gate electrode side are drawn from the side Source, and 6 cabling of circuit is corresponding is reversely input to compensation point along above-mentioned direction for compensation
3。
In a specific embodiment of the invention, the detecting point 2 is arranged in the 1 inside gate terminal of display panel.It is corresponding
In the side Source COF, the side Gate COF equally will appear the common electrode voltage deviation setting current potential of gate electrode side, and cause level
The problem of crosstalk, the present embodiment are equally detected and are compensated to the voltage of gate terminal, to overcome drawbacks described above.Specifically, grid
Extreme detecting point 2 may be provided at the middle position of the side, in favor of improving compensation effect.In this detecting site setting
Under, the corresponding compensation point of source terminal is reversed compensation along detecting direction.
In a specific embodiment of the invention, the offset voltage in the compensation circuit 6 is defeated by the common electrode signal wire
Enter to compensation point 3.To improve compensation effect.
In a specific embodiment of the invention, the detecting point 2 is to be arranged in the display panel 1 with the compensation point 3
The gold size point of surrounding.The present invention directly chooses the gold size point being inherently arranged and detects and compensate, and does not need additional set-point
Position optimizes circuit cabling, improves compensation effect.
In a specific embodiment of the invention, Fig. 4 is referred to, Fig. 4 is reversed operation amplifier provided in an embodiment of the present invention
Device circuit diagram, the detecting processing circuit 5 include reversed operational amplifier, the reversed opamp input terminal connection
4 output end of detecting circuit and the original common electrode voltage output end, the reversed operational amplifier output terminal connect institute
State compensation 6 output end of circuit.
The present invention detects the electricity of different location by the way that multiple detecting points 2 and multiple compensation points 3 are arranged on display panel 1
Press degrees of offset, correspondence compensates, to offset common electrode variation caused by cross-interference issue.It is mended compared to traditional single-point
It repays, the drift condition that multiple points are capable of more accurate detection different location is arranged in the present invention according to actual needs, to make
Compensation result is more accurate.
Embodiment two
Another embodiment of the present invention provides a kind of common electrode voltage compensating method, comprising: 1 outside of display panel
Common electrode signal wire is connected, original common-battery pole tension is output to inside the display panel 1 by the common electrode signal wire, institute
It states and is provided with multiple detecting points 2 and multiple compensation points 3 on the inside of display panel 1；Wherein, which comprises
Detect the detecting voltage of the detecting point 2；
Offset voltage is obtained according to the detecting voltage and the original common-battery pole tension；
The offset voltage is loaded into the compensation point 3, compensates the common electrode signal wire output end voltage.
In a specific embodiment of the invention, the detecting point 2 is arranged in the 1 inside source terminal of display panel, described
The end-to-end inside of source electrode and the 1 inside gate terminal of display panel.
In a specific embodiment of the invention, the offset voltage in the compensation circuit 6 is defeated by the common electrode signal wire
Enter to compensation point 3.
In a specific embodiment of the invention, the detecting point 2 is to be arranged in the display panel 1 with the compensation point 3
The gold size point of surrounding.
The present invention detects the electricity of different location by the way that multiple detecting points 2 and multiple compensation points 3 are arranged on display panel 1
Press degrees of offset, correspondence compensates, to offset common electrode variation caused by cross-interference issue.It is mended compared to traditional single-point
It repays, the drift condition that multiple points are capable of more accurate detection different location is arranged in the present invention according to actual needs, to make
Compensation result is more accurate.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (10)
1. a kind of common electrode voltage compensating device characterized by comprising
Display panel, the display panel outside connect common electrode signal wire, and original common-battery pole tension is believed by the common electrode
Number line is output to inside the display panel, is provided with multiple detecting points and multiple compensation points on the inside of the display panel；
Circuit is detected, for detecting the detecting voltage of the detecting point；
Processing circuit is detected, the detecting circuit is connected, for obtaining according to the detecting voltage and the original common-battery pole tension
To offset voltage；
Circuit is compensated, the detecting processing circuit is connected, for the offset voltage to be loaded into the compensation point, described in compensation
Common electrode signal wire output end voltage.
2. common electrode voltage compensating device according to claim 1, which is characterized in that the detecting point setting is described aobvious
Show source terminal and the end-to-end inside of the source electrode on the inside of panel.
3. common electrode voltage compensating device according to claim 1, which is characterized in that the detecting point setting is described aobvious
Show gate terminal on the inside of panel.
4. common electrode voltage compensating device according to claim 1, which is characterized in that the offset voltage in the compensation circuit
Compensation point is input to by the common electrode signal wire.
5. common electrode voltage compensating device according to claim 1, which is characterized in that the detecting point and the compensation point
For the gold size point being arranged in around the display panel.
6. common electrode voltage compensating device according to claim 1, which is characterized in that the detecting processing circuit includes anti-
To operational amplifier, the reversed opamp input terminal connects the detecting loop output and the original common electrode electricity
Output end is pressed, the reversed operational amplifier output terminal connects the compensation loop output.
7. a kind of common electrode voltage compensating method characterized by comprising
The detecting voltage of detection detecting point；
Offset voltage is obtained according to the detecting voltage and original common-battery pole tension；
The offset voltage is loaded into compensation point, compensates common electrode signal wire output end voltage.
8. common electrode voltage compensating method according to claim 7, which is characterized in that the detecting point setting is described aobvious
Show source terminal on the inside of panel, the end-to-end inside of the source electrode and display panel inside gate terminal.
9. common electrode voltage compensating method according to claim 7, which is characterized in that the offset voltage in the compensation circuit
Compensation point is input to by the common electrode signal wire.
10. common electrode voltage compensating method according to claim 7, which is characterized in that the detecting point and the compensation
Point is the gold size point being arranged in around the display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711319637.7A CN109920383A (en) | 2017-12-12 | 2017-12-12 | A kind of common electrode voltage compensating device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711319637.7A CN109920383A (en) | 2017-12-12 | 2017-12-12 | A kind of common electrode voltage compensating device and method |
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| CN109920383A true CN109920383A (en) | 2019-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711319637.7A Pending CN109920383A (en) | 2017-12-12 | 2017-12-12 | A kind of common electrode voltage compensating device and method |
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Cited By (4)
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| CN110752838A (en) * | 2019-11-11 | 2020-02-04 | 上海联影医疗科技有限公司 | Series diode circuit |
| CN114280854A (en) * | 2021-12-17 | 2022-04-05 | 惠科股份有限公司 | Display panel and display |
| CN114743516A (en) * | 2022-04-11 | 2022-07-12 | 惠科股份有限公司 | Compensation circuit and liquid crystal display device |
| WO2024036813A1 (en) * | 2022-08-19 | 2024-02-22 | 北海惠科光电技术有限公司 | Display panel and display apparatus |
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Application publication date: 20190621 |
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