CN108877707A - Reduce method, circuit and the liquid crystal display device of crosstalk - Google Patents
Reduce method, circuit and the liquid crystal display device of crosstalk Download PDFInfo
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- CN108877707A CN108877707A CN201810593944.2A CN201810593944A CN108877707A CN 108877707 A CN108877707 A CN 108877707A CN 201810593944 A CN201810593944 A CN 201810593944A CN 108877707 A CN108877707 A CN 108877707A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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- 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)
- Liquid Crystal Display Device Control (AREA)
Abstract
The present invention relates to a kind of methods for reducing crosstalk, and when crosstalk occurs, the jump in potential of a moment is formed on public electrode wire, the jump in potential because the coupling of capacitor leads to the reduction of data output signal voltage value, including：Crosstalk voltage signal on the public electrode wire of crosstalk occurs for detection；The crosstalk voltage signal is filtered, deviation voltage signal is obtained；By on the deviation voltage Signal averaging to the data output signal, correction data output signal is obtained.The method of above-mentioned reduction crosstalk is added on data output signal after being filtered the skip signal that crosstalk generates, and the voltage difference caused by crosstalk compensates, to reach good display effect.The invention also includes a kind of circuits and a kind of liquid crystal display device for reducing crosstalk.
Description
Technical field
The present invention relates to technical field of liquid crystal display, more particularly to a kind of method, circuit and liquid crystal for reducing crosstalk
Showing device.
Background technique
With the development of LCD technology, to Thin Film Transistor-LCD in high-resolution, wide viewing angle, high response
The requirement of speed, high aperture etc. is higher and higher, meanwhile, the line spacing along with the diminution of Pixel Dimensions, in TFT substrate
Also smaller and smaller, the coupling aggravation between unlike signal line when a kind of signal jumps, may influence whether periphery
The stability of other signals.Therefore, crosstalk (Crosstalk) be liquid crystal display display it is bad in relatively common one
Kind phenomenon, specifically refers to some region of picture and influences whether the picture in other regions, and causes showing for bad display
As.According to the different location that crosstalk occurs, vertical crosstalk and horizontal crosstalk can be divided into.The reason of generating crosstalk phenomenon is derived from
Capacitive coupling effect between data line (Data line) and public electrode (Common Electrode).For example, being gone here and there in level
It, will be via the parasitism electricity between data line and public electrode when the current potential of data line changes during the generation disturbed
Hold, forms the jump in potential of a moment on public electrode wire.At this point, if the signal delay of public electrode is more serious or electric
Press driving capability insufficient, then its current potential can not just be restored to presetting current potential quickly, this jump in potential can pass through storage electricity
The coupling of appearance drags down the cross-pressure in pixel, and pixel intensity is caused to reduce and form crosstalk.
Summary of the invention
Based on this, it is necessary to for the problem that crosstalk is frequent in current field of liquid crystal display, influence display effect, provide one
Kind reduces method, circuit and the liquid crystal display device of crosstalk.
A method of reducing crosstalk, applied to the crosstalk phenomenon in liquid crystal display device, the liquid crystal display device packet
Public electrode wire, data line, data drive circuit and pixel unit are included, the data drive circuit output data output signal is driven
The data line is moved so that the pixel unit is lighted, when crosstalk occurs, the current potential of data line changes, and occurs in crosstalk
When, the jump in potential of a moment is formed on public electrode wire, the jump in potential is because the coupling of capacitor leads to data
Output signal voltage value reduces, including：Crosstalk voltage signal on the public electrode wire of crosstalk occurs for detection；To the string
It disturbs voltage signal to be filtered, obtains deviation voltage signal；By the deviation voltage Signal averaging to the data output signal
On, obtain correction data output signal.
It is described in one of the embodiments, that the crosstalk voltage signal is filtered, obtain deviation voltage signal
Step includes：The crosstalk voltage signal is filtered, the DC voltage not occurred when crosstalk on public electrode wire is filtered off, obtains
To deviation voltage signal.
The data output signal is the constant pulse signal of voltage max in one of the embodiments, for driving
Pixel unit in hydrodynamic crystal device is lighted.
The crosstalk is horizontal crosstalk in one of the embodiments, and the method for reducing crosstalk is for reducing liquid crystal
The horizontal crosstalk that data line generates the capacitive coupling of public electrode wire in display device.
A kind of circuit reducing crosstalk, applied to the crosstalk phenomenon in liquid crystal display device, including：Detection module is used for
Crosstalk voltage signal on the public electrode wire of crosstalk occurs for detection；Filter module, for being carried out to the crosstalk voltage signal
Filtering, obtains deviation voltage signal；Correction module, for data output signal, obtaining the deviation voltage Signal averaging
To correction data output signal.
The filter module filters off not for being filtered to the crosstalk voltage signal in one of the embodiments,
DC voltage when crosstalk on public electrode wire occurs, obtains deviation voltage signal.
The data output signal of the correction module correction is the constant arteries and veins of voltage max in one of the embodiments,
Signal is rushed, for driving the pixel unit in liquid crystal display device.
The crosstalk is horizontal crosstalk in one of the embodiments, and the circuit for reducing crosstalk is for reducing liquid crystal
The horizontal crosstalk that data line generates the capacitive coupling of public electrode wire in display device.
A kind of liquid crystal display device, including public electrode wire, data line, scan signal line, data drive circuit, storage electricity
Hold and pixel unit, the pixel unit be connected with described storage capacitors one end, the storage capacitors other end with it is described public
Electrode wires are connected, and the pixel unit is located at the infall of the scan signal line and the data line, the data-driven electricity
Road output data output signal, the data output signal drives the data line so that the pixel unit is lighted, the liquid
Crystal device further includes the circuit of above-mentioned reduction crosstalk, the circuit input end for reducing crosstalk and the public electrode wire phase
Even, output end is connected with the data drive circuit.
The liquid crystal display device further includes array substrate and colored optical filtering substrates in one of the embodiments, described
Array substrate and the colored optical filtering substrates are just arranged oppositely.
Method, circuit and the liquid crystal display device of above-mentioned reduction crosstalk are folded after being filtered the skip signal that crosstalk generates
It is added on data output signal, the voltage difference caused by crosstalk compensates, to reach good display effect.
Detailed description of the invention
Fig. 1 is the schematic diagram of the method for the reduction crosstalk of the embodiment of the present invention；
Fig. 2 be the embodiment of the present invention reduction crosstalk method in crosstalk voltage signal Vcom, deviation voltage signal V ',
The waveform diagram of data output signal Data, correction data output signal Data '；
Fig. 3 is the schematic diagram for the pixel circuit that data line, scan signal line and pixel unit are constituted in liquid crystal display device；
Fig. 4 is the schematic diagram of the circuit of the reduction crosstalk of the embodiment of the present invention；
Fig. 5 is the schematic diagram of the liquid crystal display device of the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to Figure 1 and Fig. 2, Fig. 1 are the schematic diagram of the method for the reduction crosstalk of the embodiment of the present invention, and Fig. 2 is this hair
Bright embodiment reduction crosstalk method in crosstalk voltage signal Vcom, deviation voltage signal V ', data output signal Data,
The waveform diagram of correction data output signal Data '.In the present embodiment, the method for reducing crosstalk is for solving film crystal
Crosstalk phenomenon in pipe liquid crystal display device, the liquid crystal display device include first substrate, the second substrate, active switch, sweep
Retouch signal wire, public electrode wire, storage capacitors, data line, data drive circuit and pixel unit, wherein the active switch
For example, transistor, in one embodiment, the transistor are, for example, thin film transistor (TFT) (TFT), and the first substrate is array
Substrate, the second substrate are colored optical filtering substrates.Wherein, the first substrate is just being arranged oppositely with the second substrate, the master
Dynamic switch, the scan signal line, the public electrode wire, the data line, the pixel unit are arranged in first base
On plate, the data drive circuit is arranged by flexible circuit board in first substrate marginal position.The pixel unit with it is described
Storage capacitors one end is connected, and the storage capacitors other end is connected with the public electrode wire, and the pixel unit is located at described
The infall of scan signal line and the data line, the data drive circuit output data output signal, the data output
Signal drives the data line so that the pixel unit is lighted.The public electrode wire plays the role of precharge, is used for
The current potential of the pixel unit is improved when inactive, so that faster, display effect is more for speed when liquid crystal display device starting
It is good.
Fig. 3 is referred to, Fig. 3 is that active switch, data line, scan signal line and pixel unit are constituted in liquid crystal display device
Pixel circuit schematic diagram.During the generation of liquid crystal display horizontal crosstalk, when the current potential of data line changes,
The current potential that a moment via the parasitic capacitance between data line and public electrode wire, will be formed on public electrode wire is jumped
Become.At this point, current potential just can not be extensive quickly if the signal delay of public electrode wire is more serious or voltage driving capability is insufficient
Presetting current potential is arrived again, this jump in potential can drag down the cross-pressure in pixel by the coupling of storage capacitors, lead to picture
Plain brightness reduces and forms crosstalk.
In the present embodiment, the method for reducing crosstalk includes：
Step 100, the crosstalk voltage on the public electrode wire of crosstalk occurs for detection.
Specifically, will form the electricity of a moment on public electrode wire during the generation of the liquid crystal display crosstalk
Position jump, at this point, detecting the crosstalk voltage signal Vcom on the public electrode wire and recording its waveform.
Specifically, in the present embodiment, what the method for reducing crosstalk reduced is the horizontal string that liquid crystal display generates
It disturbs.The horizontal crosstalk is related with capacitive coupling of the data line to public electrode wire, electric leakage sum number of the vertical crosstalk with TFT
It is related according to capacitive coupling of the line to pixel electrode.In the present embodiment, the method for reducing crosstalk is for reducing liquid crystal display
The horizontal crosstalk that data line generates the capacitive coupling of public electrode wire in device.
Specifically, it is V3 that DC voltage when crosstalk on the public electrode wire does not occur, occur described public when crosstalk
Occur jump in potential in electrode wires, the voltage peak on when jump in potential public electrode wire is V2, voltage dips V4.
Step 110, the crosstalk voltage signal is filtered, obtains deviation voltage signal.
Specifically, the step 110 includes being filtered to the crosstalk voltage signal Vcom, when crosstalk does not occur for elimination
DC voltage on public electrode wire obtains deviation voltage signal V '.DC voltage when crosstalk on public electrode wire does not occur
For V3, the crosstalk voltage signal V ' is filtered, filters off the DC voltage V3 not occurred when crosstalk on public electrode wire, i.e.,
The entirety of the crosstalk voltage signal Vcom is subtracted into the d. c. voltage signal that a voltage value is V3, obtains deviation voltage signal
V’。
Specifically, the deviation voltage signal V ' voltage peak is V2-V3, valley is-(V3-V4), and DC voltage value is
0。
Step 120, correction data output letter will on the deviation voltage Signal averaging to the data output signal, be obtained
Number.
Specifically, the data output signal Data is the constant pulse signal of voltage max, for driving liquid crystal
Pixel unit in showing device.
Specifically, it is V5 that the data output signal Data, which is voltage peak, valley is the pulse signal of V1.
Specifically, the deviation voltage signal V ' is added on data output signal Data, correction data output is obtained
Signal Data '.The peak value of the correction data output signal Data ' is (V2-V3)+V5, valley V6, V6=V1- (V3-
V4)。
Fig. 4 is referred to, Fig. 4 is the schematic diagram of the circuit of the reduction crosstalk of the embodiment of the present invention.In the present embodiment, institute
The circuit for reducing crosstalk is stated for solving the crosstalk phenomenon in Thin Film Transistor-LCD.
In the present embodiment, the circuit for reducing crosstalk includes：
Detection module 400, for detecting the crosstalk voltage signal on the public electrode wire that crosstalk occurs.
Filter module 410 obtains deviation voltage signal for being filtered to the crosstalk voltage signal.
Specifically, the filter module 410 for being filtered to the crosstalk voltage signal, filters off when crosstalk not occurring
DC voltage on public electrode wire obtains deviation voltage signal.
Correction module 420, for data output signal, it is defeated to be obtained correction data for the deviation voltage Signal averaging
Signal out.
Specifically, the data output signal that the correction module 420 corrects is the constant pulse signal of voltage max, use
Pixel unit in driving liquid crystal display device.
Specifically, the crosstalk is horizontal crosstalk, the circuit for reducing crosstalk is for reducing number in liquid crystal display device
The horizontal crosstalk generated according to capacitive coupling of the line to public electrode wire.
Fig. 5 is referred to, Fig. 5 is the schematic diagram of the liquid crystal display device of the embodiment of the present invention.
In the present embodiment, the liquid crystal display device includes including public electrode wire 500, data line 510, scanning signal
Line 520, data drive circuit 530, pixel unit 540 and storage capacitors 560.The pixel unit 540 and the storage capacitors
560 one end are connected, and 560 other end of the storage capacitors pixel unit 540 that is connected with the public electrode wire 500 is located at institute
State the infall of scan signal line 520 and the data line 510, the 530 output data output signal of data drive circuit, institute
Stating data output signal drives the data line 510 so that the pixel unit 540 is lighted.The liquid crystal display device further includes
The circuit 550 of above-mentioned reduction crosstalk, 550 input terminal of circuit for reducing crosstalk are connected with the public electrode wire 500, export
End is connected with the data drive circuit 530.
In the present embodiment, the liquid crystal display device is Thin Film Transistor-LCD.
In the present embodiment, the liquid crystal display device further includes array substrate and colored optical filtering substrates, the array base
Plate and the colored optical filtering substrates are just arranged oppositely.
Method, circuit and the liquid crystal display device of above-mentioned reduction crosstalk are folded after being filtered the skip signal that crosstalk generates
It is added on data output signal, the voltage difference caused by crosstalk compensates, and increases charging voltage, reduces pixel both ends after coupling
The error of cross-pressure reaches desired display so that the pixel voltage after coupling reaches our pixel cross-pressures initially set as far as possible
Effect.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of method for reducing crosstalk, applied to the crosstalk phenomenon in liquid crystal display device, the liquid crystal display device includes
Public electrode wire, data line, data drive circuit and pixel unit, the data drive circuit output data output signal, institute
It states data output signal and drives the data line so that the pixel unit is lighted, when crosstalk occurs, the current potential of data line occurs
Variation forms the jump in potential of a moment on public electrode wire, and the jump in potential is because the coupling of capacitor causes
Data output signal voltage value reduces, which is characterized in that including：
Crosstalk voltage signal on the public electrode wire of crosstalk occurs for detection；
The crosstalk voltage signal is filtered, deviation voltage signal is obtained；
By on the deviation voltage Signal averaging to the data output signal, correction data output signal is obtained.
2. the method according to claim 1 for reducing crosstalk, which is characterized in that described to be carried out to the crosstalk voltage signal
Filtering, the step of obtaining deviation voltage signal include：
The crosstalk voltage signal is filtered, the DC voltage not occurred when crosstalk on public electrode wire is filtered off, is obtained partially
Potential difference signal.
3. the method according to claim 1 for reducing crosstalk, which is characterized in that the data output signal is that voltage is maximum
It is worth constant pulse signal, for driving the pixel unit in liquid crystal display device to light.
4. the method according to claim 1 for reducing crosstalk, which is characterized in that the crosstalk is horizontal crosstalk, described to subtract
The method of small crosstalk is used to reduce the horizontal crosstalk that data line generates the capacitive coupling of public electrode wire in liquid crystal display device.
5. a kind of circuit for reducing crosstalk, applied to the crosstalk phenomenon in liquid crystal display device, which is characterized in that including：
Detection module, for detecting the crosstalk voltage signal on the public electrode wire that crosstalk occurs；
Filter module obtains deviation voltage signal for being filtered to the crosstalk voltage signal；
Correction module, for obtaining correction data output signal for the deviation voltage Signal averaging to data output signal.
6. the circuit according to claim 5 for reducing crosstalk, which is characterized in that the filter module is used for the crosstalk
Voltage signal is filtered, and is filtered off the DC voltage not occurred when crosstalk on public electrode wire, is obtained deviation voltage signal.
7. the circuit according to claim 5 for reducing crosstalk, which is characterized in that the data output of the correction module correction
Signal is the constant pulse signal of voltage max, for driving the pixel unit in liquid crystal display device.
8. the circuit according to claim 5 for reducing crosstalk, which is characterized in that the crosstalk is horizontal crosstalk, described to subtract
The circuit of small crosstalk is used to reduce the horizontal crosstalk that data line generates the capacitive coupling of public electrode wire in liquid crystal display device.
9. a kind of liquid crystal display device, including public electrode wire, data line, scan signal line, data drive circuit, storage capacitors
And pixel unit, the pixel unit are connected with described storage capacitors one end, the storage capacitors other end and the common electrical
Polar curve is connected, and the pixel unit is located at the infall of the scan signal line and the data line, the data drive circuit
Output data output signal, the data output signal drive the data line so that the pixel unit is lighted, and feature exists
In the liquid crystal display device further includes the described in any item circuits for reducing crosstalk of claim 5-8, the reduction crosstalk
Circuit input end is connected with the public electrode wire, and output end is connected with the data drive circuit.
10. display device according to claim 9, which is characterized in that the liquid crystal display device further includes array substrate
And colored optical filtering substrates, the array substrate and the colored optical filtering substrates are just arranged oppositely.
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| CN201810593944.2A CN108877707A (en) | 2018-06-11 | 2018-06-11 | Reduce method, circuit and the liquid crystal display device of crosstalk |
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| CN201810593944.2A CN108877707A (en) | 2018-06-11 | 2018-06-11 | Reduce method, circuit and the liquid crystal display device of crosstalk |
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| CN114360458A (en) * | 2022-01-27 | 2022-04-15 | 京东方科技集团股份有限公司 | Display data compensation method, circuit and display device |
| CN114360458B (en) * | 2022-01-27 | 2023-02-07 | 京东方科技集团股份有限公司 | Display data compensation method, circuit and display device |
| CN114913826A (en) * | 2022-05-16 | 2022-08-16 | 星源电子科技(深圳)有限公司 | Manufacturing method of low-crosstalk liquid crystal module |
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