CN103913867B - Liquid crystal display device and noise elimination method - Google Patents
Liquid crystal display device and noise elimination method Download PDFInfo
- Publication number
- CN103913867B CN103913867B CN201410126748.6A CN201410126748A CN103913867B CN 103913867 B CN103913867 B CN 103913867B CN 201410126748 A CN201410126748 A CN 201410126748A CN 103913867 B CN103913867 B CN 103913867B
- Authority
- CN
- China
- Prior art keywords
- signal
- common electric
- electric voltage
- noise
- noise signal
- 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.)
- Active
Links
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
Embodiments of the invention disclose a liquid crystal display device and a noise elimination method which belong to the field of display techniques. The liquid crystal display device comprises a printed circuit board, a liquid crystal display panel, and a flexible printed circuit board, and a timing controller, a digital-analog conversion circuit, and a common voltage supply device are disposed on the printed circuit board. The timing controller is used for generating a timing signal according to a detected noise signal generated by a common electrode, and providing the generated timing signal for the digital-analog conversion circuit. The digital-analog conversion circuit is used for converting the timing signal provided by the timing controller into a first analog signal, and providing the first analog signal for the common voltage supply device. The common voltage supply device is used for superposing the first analog signal and common voltage with the noise signal so as to generate first common voltage with the noise signal eliminated. The liquid crystal display device and the noise elimination method have the advantages that the noise generated by the display panel can be substantially eliminated and no touch disturbance is caused to a touch panel on the display panel.
Description
Technical field
The present invention relates to Display Technique field, particularly to a kind of liquid crystal indicator and noise removing method.
Background technology
In recent years, the rapid technological improvement relevant with liquid crystal indicator, such as touch-control show, by extensively
General being applied on communication product, computer installation and consumption electronic products, nationality is applied to be significantly increased
Convenience in the usefulness of electronic product and use.The liquid crystal indicator with touch display function generally wraps
Include display panels and the touch screen being arranged on display panels.
The cross-sectional view of existing a kind of display panels is as it is shown in figure 1, this display panels
It is oppositely arranged with colored filter substrate 101 including colored filter (Color Filter, CF) substrate 101
Thin-film transistor array base-plate 103 and be clipped in thin-film transistor array base-plate 103 and colored filter substrate
Liquid crystal layer 102 between 101.Wherein, colored filter substrate 101 includes the first substrate of glass 110, the
It is provided with public electrode 105, thin film transistor (TFT) array in one substrate of glass 110 and towards the side of liquid crystal layer 102
Substrate 103 includes the second substrate of glass 112, in the second substrate of glass 112 and towards the side of liquid crystal layer 102
Being provided with pixel electrode 107, public electrode 105 and pixel electrode 107 can apply electric field to liquid crystal layer 102,
And then display panels display picture can be controlled.
Thin-film transistor array base-plate 103 is additionally provided with MOSFET (Metal Oxide Semiconductor
Field-Effect-Transistor, MOS memory), it is a kind of a-Si (amorphous silicon membrane
Transistor), it includes source electrode (source) 111, the grid (gate) being arranged in the second substrate of glass 112
113 and drain electrode 115, source electrode 111 and grid 113 can and colored filter substrate 101 on the common electrical that arranges
Pole 105 forms coupling electric capacity.When the waveform of source electrode 111 with grid 113 output signal changes, change
Waveform can be coupled on public electrode 105, it is not stable for causing the voltage on public electrode 105, and
With noise, and the voltage on public electrode 105 is by the common electric voltage being connected with public electrode 105
Thering is provided device to provide, such noise also can be delivered to common electric voltage by public electrode 105 and provide device.
When the noise produced on public electrode 105 reaches certain value, just influence whether to arrange on display panels
Touch screen (Touch panel) (touch screen can be arranged on colored filter substrate 101) touch-control spirit
Sensitivity, if such as noise is too big, can cause the position of the touch point on user's point touching screen to be difficult to detect,
The touch-control to touch screen is caused to disturb.
Summary of the invention
The present invention provides a kind of liquid crystal indicator and noise removing method, to solve owing to producing on public electrode
The problems such as the touch-control interference that touch screen is brought by raw noise.
The invention provides a kind of liquid crystal indicator, this liquid crystal indicator includes: printed circuit board (PCB), liquid
LCD panel, the flexible printed wiring board being connected with printed circuit board (PCB) and display panels, printed circuit
Time schedule controller, D/A converting circuit and common electric voltage are set on plate device, wherein, time schedule controller are provided,
For producing clock signal according to the noise signal produced on the public electrode that detects, and by produce time
Sequential signal is supplied to D/A converting circuit；D/A converting circuit, for the sequential letter provided by time schedule controller
Number be converted to the first analogue signal, and the first analogue signal be supplied to common electric voltage device is provided；Common electrical
Pressure provides device, for by superimposed with the common electric voltage with noise signal for the first analogue signal, to generate
First common electric voltage eliminating noise signal, and the common electric voltage that first eliminates noise signal is supplied to public
Electrode.
In preferred embodiment of the present invention, the waveform of the first analogue signal is the noise produced on public electrode
The inversion waveforms of the waveform of signal.
In preferred embodiment of the present invention, printed circuit board (PCB) also sets up testing circuit；Wherein, common electrical
Pressure provides device, is supplied to testing circuit for eliminating the common electric voltage of noise signal by first；Testing circuit,
Whether the waveform for the common electric voltage of detection the first elimination noise signal fluctuates, when there is fluctuation,
Then output control signal is to D/A converting circuit；D/A converting circuit, for the control according to testing circuit output
Signal processed generates the second analogue signal；Common electric voltage provides device, for D/A converting circuit is generated the
Two analogue signals are superimposed, to generate the second elimination noise signal with the common electric voltage of the first elimination noise signal
Common electric voltage.
In preferred embodiment of the present invention, printed circuit board (PCB) also setting up memorizer, memorizer is in advance
Storage eliminates the waveform fluctuation information of the common electric voltage of noise signal and the inquiry table of control signal corresponding relation,
Testing circuit by detect eliminate noise signal common electric voltage waveform fluctuation information be stored in inquiry table
In corresponding relation compare, and obtain control signal.
In preferred embodiment of the present invention, liquid crystal indicator also includes backlight and is arranged at backlight
On conductive film, D/A converting circuit, be additionally operable to the first analogue signal is supplied to conductive film, public
The first analogue signal on electrode sensing conductive film so that produce in the first analogue signal and public electrode
Noise signal is superimposed, to eliminate the noise signal on common electric voltage.
Present invention also offers a kind of noise removing method, this noise removing method, including: utilize sequential control
Device processed according on the public electrode detected produce noise signal and produce clock signal, and by produce time
Sequential signal is supplied to D/A converting circuit；Utilize the clock signal that time schedule controller is provided by D/A converting circuit
Be converted to the first analogue signal, and the first analogue signal is supplied to common electric voltage offer device；Utilize public
Voltage offer device is by superimposed with the common electric voltage with noise signal for the first analogue signal, to generate first
Eliminate the common electric voltage of noise signal, and the common electric voltage that first eliminates noise signal is supplied to public electrode.
In preferred embodiment of the present invention, the waveform of the first analogue signal is the noise produced on public electrode
The inversion waveforms of the waveform of signal.
In preferred embodiment of the present invention, further comprise the steps of: and utilize common electric voltage to provide device to disappear first
The common electric voltage of remove impurity news signal is supplied to testing circuit；Utilize testing circuit detection the first elimination noise signal
The waveform of common electric voltage whether fluctuate, when there is fluctuation, then output control signal is to digital-to-analogue conversion
Circuit；D/A converting circuit is utilized to generate the second analogue signal according to the control signal that testing circuit exports；Profit
The second analogue signal providing device to be generated by D/A converting circuit with common electric voltage eliminates noise signal with first
Common electric voltage superimposed, to generate the common electric voltage of the second elimination noise signal.
In preferred embodiment of the present invention, utilize the common electrical of testing circuit detection the first elimination noise signal
Whether the waveform of pressure fluctuates, and when there is fluctuation, then output control signal is in D/A converting circuit,
Including step: utilize the waveform fluctuation information of common electric voltage eliminating noise signal that testing circuit will detect
Compare with the corresponding relation being stored in advance in inquiry table, and obtain control signal.
In preferred embodiment of the present invention, further comprise the steps of: and utilize D/A converting circuit by the first simulation letter
Number it is supplied to conductive film, the first analogue signal on public electrode sensing conductive film so that the first simulation
The noise signal produced on signal and public electrode is superimposed, to eliminate the noise signal on common electric voltage, leads
Electrolemma sheet is arranged in backlight.
The technical scheme that the embodiment of the present invention provides has the benefit that
Device is provided the first analogue signal to be stacked with the common electric voltage with noise signal by common electric voltage
Add, to generate the common electric voltage of the first elimination noise signal, and the common electric voltage eliminating noise signal by first
It is supplied to the public electrode being arranged on colored filter substrate.Solve miscellaneous due to produce on public electrode
The problems such as the touch-control interference that touch screen is brought by news, the embodiment of the present invention can produce on display panels
Noise do Processing for removing fundamentally, will not on display panels arrange touch screen bring touch-control do
Disturb.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technology of the present invention
Means, and can being practiced according to the content of description, and in order to allow the present invention above and other purpose,
Feature and advantage can become apparent, and below especially exemplified by preferred embodiment, and coordinates accompanying drawing, describes in detail such as
Under.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of existing a kind of display panels；
Fig. 2 A is the cut-away section structural representation of the liquid crystal indicator that first embodiment of the invention provides；
Fig. 2 B is the main frame block diagram of the liquid crystal indicator that first embodiment of the invention provides；
In Fig. 3, (a) is the voltage versus time wave figure of a kind of noise signal；
In Fig. 3 (b) be the clock signal obtained according to the waveform of the noise signal of (a) in Fig. 3 voltage-
Time waveform figure；
In Fig. 3, (c) is the voltage versus time wave figure of a kind of first analogue signal；
In Fig. 3, (d) is the voltage versus time wave figure of the common electric voltage of the first elimination noise signal；
Fig. 4 is the main frame block diagram of the liquid crystal indicator that second embodiment of the invention provides；
Fig. 5 is the main frame block diagram of the liquid crystal indicator that third embodiment of the invention provides；
Fig. 6 is the flow chart of the noise removing method that fourth embodiment of the invention provides；
Fig. 7 is the flow chart of the noise removing method that fifth embodiment of the invention provides；
Fig. 8 is the flow chart of the noise removing method that sixth embodiment of the invention provides.
Detailed description of the invention
By further illustrating the technological means and effect that the present invention taked by reaching predetermined goal of the invention, with
Lower combination accompanying drawing and preferred embodiment, to the liquid crystal indicator proposed according to the present invention and noise removing method
Its detailed description of the invention, structure, feature and effect, after describing in detail such as.
For the present invention aforementioned and other technology contents, feature and effect, in following cooperation with reference to graphic
Preferred embodiment can clearly present in describing in detail.By the explanation of detailed description of the invention, when can be to this
Technological means and effect that invention is taked by reaching predetermined purpose are able to more go deep into and concrete understanding, so
And institute's accompanying drawings is only to provide reference and purposes of discussion, not it is used for the present invention is any limitation as.
First embodiment
Refer to Fig. 2 A and Fig. 2 B, Fig. 2 A shows the liquid crystal indicator that first embodiment of the invention provides
Cut-away section structural representation.Fig. 2 B shows the liquid crystal indicator that first embodiment of the invention provides
Main frame block diagram.Described liquid crystal indicator, including: printed circuit board (PCB) (Printed Circuit Board,
201, PCB) display panels 205, be connected with printed circuit board (PCB) 201 and display panels 205
Flexible printed wiring board (Flexible Printed Circuit Board, FPCB) 203 and be arranged at liquid crystal
Contact panel (not shown) on display floater 205.Display panels in Fig. 2 A includes array
Colored filter substrate 202 that substrate 200 and array base palte 200 are oppositely arranged, it is clipped in array base palte 200
And liquid crystal layer 204 between colored filter substrate 202 and the frame glue 221 that is arranged on around liquid crystal layer 204,
Array base palte 200 and colored filter substrate 202 are fitted tightly by frame glue, the district that frame glue 221 is surrounded
A viewing area 223 is defined in territory.Colored filter substrate 202 includes substrate of glass 215, is arranged on substrate of glass
The protective layer (Over Coat) 217 on 215 surfaces, the covering public electrode 219 on protective layer 217 surface.
Arrange on printed circuit board (PCB) 201 time schedule controller (TCON) 207, D/A converting circuit 209, with
And common electric voltage provides device 211.
Time schedule controller 207, is electrical connected with D/A converting circuit 209, for according to the common electrical detected
The noise signal that produces on pole 219 and produce clock signal, and the clock signal of generation be supplied to digital-to-analogue turn
Change circuit 209.
Specifically, on public electrode 219 produce noise signal can by detect in advance or in real time detect and
Know, if using detection mode in advance such as can repeatedly be repeatedly detected reality by detection equipment such as oscillographs
The noise signal produced on public electrode 219 in border, then the noise signal detected is supplied to sequencing contro
Device 207.The liquid crystal indicator noise signal when showing different pictures is different, and reason is display difference
During picture, source electrode output waveform is different, causes source electrode output waveform to be coupled to the public of colored filter board 200
Noise signal on electrode 219 is different.But, know through repeated multiple times detection, often noise signal wave
The peak location of shape is identical, and simply the amplitude of noise signal waveform is different.Therefore can be by examining in advance
Measure the noise signal produced on public electrode 219, and determine the peak location of noise signal waveform and miscellaneous
The amplitude range of news signal waveform.Wherein, noise signal is analogue signal, and clock signal is digital signal.
As shown in (a) in Fig. 3, it is shown that the voltage versus time wave figure of a kind of noise signal that detection equipment Inspection is arrived,
In Fig. 3, the waveform of the noise signal in (a) is the waveform being repeated cyclically, and in Fig. 3, (b) is according to Fig. 3
In the voltage versus time wave figure of clock signal that obtains of the noise signal waveform of (a).Fig. 3 produces in (b)
The wave period of raw clock signal and the ripple of the noise signal of generation on public electrode 219 in (a) in Fig. 3
The shape cycle is identical, the noise signal that public electrode 219 produces is when being negative pulse, then corresponding clock signal
The rising edge of waveform, when the noise signal that public electrode 219 produces is positive pulse, then corresponding clock signal
The trailing edge of waveform.In embodiments of the present invention, it is also possible to according to the waveform of detected noise signal
Different and produce the waveform of other shapes of clock signal, it is also possible to produce multiple sequential according to actual needs
The waveform of signal, but as long as the waveform of clock signal meets following condition: produce on public electrode 219
Noise signal when being negative pulse, then the rising edge of the waveform of corresponding clock signal, public electrode 219 produces
When raw noise signal is positive pulse, then the trailing edge of the waveform of corresponding clock signal.
D/A converting circuit 209, provides device 211 and time schedule controller 207 to be electrical connected with common electric voltage,
For the clock signal that time schedule controller 207 provides being converted to the first analogue signal, and by the first simulation letter
Number it is supplied to common electric voltage and device 211 is provided.
Wherein, the waveform of the first analogue signal is the anti-of the waveform of the noise signal of generation on public electrode 219
Turn waveform, i.e. the voltage magnitude of both waveforms is identical, and voltage direction is contrary.As shown in (c) in Fig. 3 it is
A kind of voltage versus time wave figure of the first analogue signal.It is exactly in Fig. 3 the waveform of noise signal in (a)
Inversion waveforms.In Fig. 3, (c) illustrates a kind of spike waveform of the first analogue signal, but does not limit use
This waveform, it is possible to use other waveform, such as square wave etc..If using square wave also to be able to upper
Stating noise signal and have certain elimination effect, the effect simply eliminated does not uses the elimination of spike waveshape signal
It is effective, but as long as noise can be made to be down to acceptable scope.
Furthermore, it is necessary to explanation, in Fig. 3 in (a)-Fig. 3 in (c), the coordinate figure on abscissa with
Source electrode is relevant with the waveform position of grid, i.e. relevant with the resolution of liquid crystal indicator and refresh rate.Vertical seat
The coordinate figure put on is relevant with the display picture of liquid crystal indicator, and therefore, in practice, abscissa is with vertical
Coordinate figure on coordinate can not be unified as a kind of coordinate value, is only a kind of example at this.
Common electric voltage provides device 211, is electrical connected with D/A converting circuit 209, for by the first simulation letter
Number superimposed with the common electric voltage with noise signal, to generate the common electric voltage of the first elimination noise signal,
And be supplied to be arranged on colored filter substrate 202 by the common electric voltage that first eliminates noise signal public
Electrode.
Because common electric voltage provides device 211 to be electrical connected with public electrode 219, it provides common electrical
Pressure is to public electrode 219, and in practice with noise signal on public electrode 219, and therefore noise signal meeting
It is transferred to common electric voltage and device 211 is provided, make the common electric voltage that common electric voltage provides device 211 to produce with miscellaneous
News signal.Therefore common electric voltage provides device 211 common electric voltage and the first simulation with noise signal to be believed
Number superimposed.And the first analogue signal is the anti-of the waveform of the one of which noise signal of generation on public electrode
Turn waveform, after this kind of noise signal that will produce in the first analogue signal and public electrode is superimposed, generate
Common electric voltage that is to say eliminate major part noise signal common electric voltage so that noise is down to accept
Scope.In practice, the liquid crystal indicator noise signal when showing different pictures is different, former
During because being display different pictures, source electrode output waveform is different, causes source electrode output waveform to be coupled to colored filter
Noise signal on the public electrode 219 of plate 200 is different.But, the often spike position of noise signal waveform
It is identical for putting, and simply the amplitude of noise signal waveform is different.And the first analogue signal is to produce on public electrode
The inversion waveforms of the waveform of raw one of which noise signal, when the first analogue signal being produced on public electrode
The waveform of the common electric voltage of the first elimination noise signal generated after this kind of raw noise signal is superimposed there is also
Fluctuation somewhat.Although noise has been lowered to acceptable scope, but is not the most perfect condition, preferable
Under state, the waveform of the first common electric voltage eliminating noise signal is to there is not any fluctuation.In Fig. 3 (d)
Showing the voltage versus time wave figure of the common electric voltage of the first elimination noise signal, its result is in the ideal situation
Smoothly.The common electric voltage so counteracting noise signal can be supplied to be arranged at colored filter substrate 202
On public electrode, thus effectively reduce noise, and then eliminate and caused touch screen performance by noise signal
Impact (the such as sensitivity impact etc. on touch screen).
In embodiments of the present invention, the common electric voltage of the first elimination noise signal of generation is supplied directly to public
Electrode 219, simply one of them example；In other embodiments, it is also possible to according to actual needs and by first
The common electric voltage eliminating noise signal is supplied to public electrode 219 by miscellaneous equipment.
As it has been described above, the liquid crystal indicator that the present embodiment provides, will by common electric voltage offer device 211
First analogue signal is superimposed with the common electric voltage with noise signal, to generate the first elimination noise signal
Common electric voltage, and be supplied to be arranged on colored filter substrate by the common electric voltage that first eliminates noise signal
Public electrode 219.Solve touch-control touch screen brought due to the noise produced on public electrode 219 to do
The problem such as disturbing, the noise that display panels produces can be done at elimination fundamentally by the embodiment of the present invention
Reason, will bring touch-control to disturb the touch screen arranged on display panels.
Second embodiment
Refer to Fig. 4, it illustrates the main frame frame of the liquid crystal indicator that second embodiment of the invention provides
Figure.Noise signal is completely eliminated by the present embodiment.Fig. 4 improves on the basis of Fig. 2 B.
It is similar to the liquid crystal indicator shown in Fig. 2 B, and its difference is, printed circuit board (PCB) 201 also sets
Put testing circuit 301 and memorizer 303.
Common electric voltage provides device 211, is additionally operable to the common electric voltage that first eliminates noise signal is supplied to detection
Circuit 301.
Testing circuit 301, provides device 211 and D/A converting circuit 209 to be electrical connected with common electric voltage, uses
Whether the waveform in the common electric voltage of detection the first elimination noise signal fluctuates, when there is fluctuation, then
Output control signal is to D/A converting circuit 209.Although noise can be lowered to permissible by first embodiment
The scope accepted, but is not the most perfect condition, ideally the first common electric voltage eliminating noise signal
Waveform is to there is not any fluctuation.If there is fluctuation, then it represents that there is also other noise caused by environment,
The noise that the uncertain factors such as such as environmental noise cause.
Testing circuit 301 is signal detection apparatus.Memorizer 303 can also be arbitrary storage device.Number
Analog conversion circuit 209, is additionally operable to the control signal according to testing circuit 301 output and generates the second analogue signal,
Common electric voltage provides device 211, is additionally operable to the second analogue signal and first generated by D/A converting circuit 209
The common electric voltage eliminating noise signal is superimposed, to generate the common electric voltage of the second elimination noise signal, then enters
Row is above-mentioned is supplied to the public affairs on testing circuit 301 and display floater by the common electric voltage that second eliminates noise signal
The process of common electrode (not shown), till the noise signal on common electric voltage is completely eliminated.Second mould
Intend the inversion waveforms of the waveform of the common electric voltage that waveform is the first elimination noise signal of signal, the i.e. second simulation
The voltage magnitude of the waveform that the waveform of signal and first eliminates the common electric voltage of noise signal is identical, voltage direction
On the contrary.
Memorizer 303 is for prestoring waveform fluctuation information and the control of the common electric voltage eliminating noise signal
The inquiry table (lookup table) of signal corresponding relation.The common electrical eliminating noise signal such as detected
The peak value of the waveform of pressure is 400mV (millivolt), then can store the waveform pair of 400mV peak value in inquiry table
Should export the numerical value of control signal to D/A converting circuit 209, such as numerical value 1 etc., i.e. deposit in inquiry table
The waveform of storage 400mV peak value closes to the corresponding of the numerical value of the control signal of D/A converting circuit 209 with output
System.
Testing circuit 301 is according to the waveform fluctuation information of the common electric voltage of the first elimination noise signal detected
Can adopt with the following method when obtaining control signal:
Testing circuit 301 is by the waveform fluctuation information of common electric voltage eliminating noise signal detected and storage
Corresponding relation in inquiry table compares, and obtains control signal.Specifically, if eliminating noise signal
Common electric voltage waveform fluctuation information in, the peak value of waveform is 300mV, in memorizer 303 storage looks into
The waveform correspondence of the 300mV peak value in inquiry table exports the numerical value of the control signal to D/A converting circuit 209
2, then the control signal that testing circuit 301 obtains from inquiry table is exactly numerical value 2.
So, can thoroughly be eliminated in order to ensure noise in practice, carried out twice noise and eliminated, the
Noise is to be fluctuated by the waveform of source electrode and gate output signal to cause, and noise is the present embodiment for the second time
In cause due to other noise present in actual environment, by as above first embodiment and the present embodiment
Twice noise eliminates such that it is able to ensure to eliminate all noises of display device.
As it has been described above, the display device that the present embodiment provides, detect that first disappears also by testing circuit 301
When the waveform of the common electric voltage of remove impurity news signal occurs fluctuation, then obtain control signal according to waveform fluctuation information,
Generating the second analogue signal with control D/A converting circuit 209, common electric voltage provides device 211 by the second mould
The common electric voltage intending signal and the first elimination noise signal is superimposed, to generate the public affairs of the second elimination noise signal
Common voltage, then carry out above-mentioned by second eliminate noise signal common electric voltage be supplied to testing circuit 301 and public affairs
The process of common electrode, till the noise signal on common electric voltage is completely eliminated such that it is able to liquid crystal
Show the noise produced on panel do thoroughly the most fundamentally, Processing for removing thoroughly, will not be on display panels
The touch screen arranged brings touch-control to disturb.
3rd embodiment
Refer to Fig. 5, it illustrates the main frame frame of the liquid crystal indicator that third embodiment of the invention provides
Figure.It is similar to the liquid crystal indicator shown in Fig. 2 B, and its difference is, liquid crystal indicator also wraps
Include backlight (not shown) and the conductive film 401 being arranged in backlight, wherein, backlight
It is arranged at below the display panels of Fig. 2 A.
D/A converting circuit 209, is additionally operable to be supplied to the first analogue signal conductive film 401 (conductive film
Material can be silver).Public electrode 219 can sense the first analogue signal on conductive film, so that
The noise signal produced in first analogue signal and public electrode 219 is superimposed, to eliminate on common electric voltage
Noise signal.Wherein, the waveform of the first analogue signal is the ripple of the noise signal produced on public electrode 219
The inversion waveforms of shape, the ripple of the noise signal that the waveform of the i.e. first analogue signal and public electrode 219 produce
The voltage magnitude of shape is identical, and voltage direction is contrary.The waveform example of the first analogue signal refers to the present invention
Related description in one embodiment.
As it has been described above, the liquid crystal indicator that the present embodiment provides, also by D/A converting circuit 209 by the
One analogue signal is supplied to conductive film so that the noise signal produced in the first analogue signal and public electrode
Superimposed, to eliminate the noise signal on common electric voltage, various ways so can be used on common electric voltage
Noise eliminate so that liquid crystal indicator disclosure satisfy that the needs without applied environment.
It is below the embodiment of the method for the present invention, the details of the most detailed description, Ke Yican in embodiment of the method
It is admitted to the device embodiment stating correspondence.
4th embodiment
Refer to Fig. 6, it illustrates the flow chart of the noise removing method that fourth embodiment of the invention provides.Should
Method can be eliminated process by the noise performed by liquid crystal indicator in first embodiment；Described noise eliminates
Method, it may include following steps 601-605:
Step 601, utilizes time schedule controller to produce according to the noise signal produced on the public electrode detected
Clock signal, and the clock signal of generation is supplied to D/A converting circuit.
Step 603, utilizes D/A converting circuit that the clock signal that time schedule controller provides is converted to the first simulation
Signal, and the first analogue signal is supplied to common electric voltage offer device.
The waveform of the first analogue signal is the inversion waveforms of the waveform of the noise signal produced on public electrode.
Step 605, utilizes common electric voltage to provide device by the first analogue signal and the common electrical with noise signal
Press superimposed, to generate the common electric voltage of the first elimination noise signal, and the public affairs eliminating noise signal by first
Common voltage is supplied to the public electrode being arranged on colored filter substrate.
As it has been described above, the noise removing method that the present embodiment provides, provide device by first by common electric voltage
Analogue signal is superimposed with the common electric voltage with noise signal, to generate the public of the first elimination noise signal
Voltage, and the common electric voltage that first eliminates noise signal is supplied to the public affairs being arranged on colored filter substrate
Common electrode.Solve the problems such as noise touch-control interference that touch screen is brought owing to producing on public electrode,
The noise produced on display panels can be done Processing for removing fundamentally by the embodiment of the present invention, will not be right
The touch screen arranged on display panels brings touch-control to disturb.
5th embodiment
Refer to Fig. 7, it illustrates the flow chart of the noise removing method that fifth embodiment of the invention provides.Should
Method can be eliminated process by the noise performed by liquid crystal indicator in the second embodiment；It is shown in Fig. 6
Noise removing method similar, its difference is, specifically can also include after the step 605 of Fig. 6:
Step 701-707.
Step 701, utilizes common electric voltage to provide device that the common electric voltage that first eliminates noise signal is supplied to inspection
Slowdown monitoring circuit.
Step 703, utilizes whether the waveform of the common electric voltage of testing circuit detection the first elimination noise signal occurs
Fluctuation, when there is fluctuation, then output control signal is to D/A converting circuit.
Step 705, utilizes D/A converting circuit to generate the second simulation letter according to the control signal that testing circuit exports
Number.
Step 707, utilizes common electric voltage to provide the second analogue signal of being generated by D/A converting circuit of device and the
The common electric voltage of one elimination noise signal is superimposed, to generate the common electric voltage of the second elimination noise signal.
After generating the common electric voltage of the second elimination noise signal, then carry out above-mentioned steps 701 will eliminate miscellaneous
The common electric voltage of news signal is supplied to the process of the public electrode on testing circuit and display floater, until public
Till noise signal on voltage is completely eliminated.
In sum, the noise removing method that the present embodiment provides, detect that first disappears also by testing circuit
When the waveform of the common electric voltage of remove impurity news signal occurs fluctuation, then obtain control signal according to waveform fluctuation information,
Generate the second analogue signal controlling D/A converting circuit, common electric voltage provide device by the second analogue signal with
The common electric voltage of the first elimination noise signal is superimposed, to generate the common electric voltage of the second elimination noise signal,
Carry out the above-mentioned mistake that the common electric voltage that second eliminates noise signal is supplied to testing circuit and public electrode again
Journey, till the noise signal on common electric voltage is completely eliminated such that it is able to produce on display panels
Raw noise does the most fundamentally, Processing for removing thoroughly, will not be to the touch arranged on display panels
Screen brings touch-control to disturb.
Sixth embodiment
Refer to Fig. 8, it illustrates the flow chart of the noise removing method that sixth embodiment of the invention provides.Should
Method can be eliminated process by the noise performed by liquid crystal indicator in the 3rd embodiment；It is shown in Fig. 6
Noise removing method similar, its difference is, also includes: the step 605 of Fig. 6 is the most all right
Replace with: step 801.
Step 801, utilizes D/A converting circuit that the first analogue signal is supplied to conductive film, public electrode sense
Answer the first analogue signal on conductive film so that the noise letter produced in the first analogue signal and public electrode
Number superimposed, to eliminate the noise signal on common electric voltage, wherein, conductive film is arranged under display floater
In the backlight of side.
In sum, the noise removing method that the present embodiment provides, also by D/A converting circuit by the first mould
Intend signal and be supplied to conductive film so that the noise signal produced in the first analogue signal and public electrode is stacked
Add, to eliminate the noise signal on common electric voltage, so can use miscellaneous by common electric voltage of various ways
News eliminate so that liquid crystal indicator disclosure satisfy that the needs without applied environment.
The above, be only presently preferred embodiments of the present invention, not makees the present invention any pro forma
Limit, although the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any
Those skilled in the art, in the range of without departing from technical solution of the present invention, when available the disclosure above
Technology contents make a little change or be modified to the Equivalent embodiments of equivalent variations, as long as being without departing from this
Bright technical scheme content, any simple modification above example made according to the technical spirit of the present invention,
Equivalent variations and modification, all still fall within the range of technical solution of the present invention.
Claims (8)
1. a liquid crystal indicator, it is characterised in that described liquid crystal indicator includes: printed circuit board (PCB),
Display panels, the flexible printed wiring board being connected with described printed circuit board (PCB) and display panels, institute
State and time schedule controller, D/A converting circuit and common electric voltage offer device are set on printed circuit board (PCB), wherein,
Described time schedule controller, during for producing according to the noise signal produced on the public electrode detected
Sequential signal, and the clock signal of generation is supplied to described D/A converting circuit, wherein, public electrode produces
When raw noise signal is negative pulse, then the rising edge of the waveform of corresponding clock signal, public electrode produces
Noise signal when being positive pulse, then the trailing edge of the waveform of corresponding clock signal；
Described D/A converting circuit, for being converted to the first mould by the clock signal that described time schedule controller provides
Intend signal, and described first analogue signal is supplied to described common electric voltage device, wherein, described the are provided
The waveform of one analogue signal is the inversion waveforms of the waveform of the noise signal produced on described public electrode, and the
The waveform of one analogue signal is identical with the voltage magnitude of the waveform of the noise signal produced on described public electrode,
Voltage direction is contrary；
Described common electric voltage provides device, for by public with noise signal of described first analogue signal
Voltage is superimposed, to generate the common electric voltage of the first elimination noise signal, and eliminates noise letter by described first
Number common electric voltage be supplied to described public electrode.
Liquid crystal indicator the most according to claim 1, it is characterised in that on described printed circuit board (PCB)
Also set up testing circuit；
Wherein, described common electric voltage provides device, provides for eliminating the common electric voltage of noise signal by first
To described testing circuit；
Described testing circuit, whether the waveform for the common electric voltage of detection the first elimination noise signal there is ripple
Dynamic, when there is fluctuation, then output control signal gives described D/A converting circuit；
Described D/A converting circuit, the control signal for exporting according to described testing circuit generates the second simulation
Signal；
Described common electric voltage provides device, for the second analogue signal that described D/A converting circuit is generated with
The common electric voltage of the first elimination noise signal is superimposed, to generate the common electric voltage of the second elimination noise signal.
Liquid crystal indicator the most according to claim 2, it is characterised in that on described printed circuit board (PCB)
Also setting up memorizer, described memorizer is for prestoring the waveform fluctuation of the common electric voltage eliminating noise signal
Information and the inquiry table of described control signal corresponding relation, the elimination noise letter that described testing circuit will detect
Number the waveform fluctuation information of common electric voltage compare with the corresponding relation being stored in inquiry table, and obtain
Described control signal.
Liquid crystal indicator the most according to claim 1, it is characterised in that described liquid crystal indicator
Also include backlight and the conductive film being arranged in backlight, described D/A converting circuit, be additionally operable to by
Described first analogue signal is supplied to conductive film, and described public electrode senses first on described conductive film
Analogue signal so that the noise signal produced in described first analogue signal and public electrode is superimposed, to disappear
Except the noise signal on common electric voltage.
5. a noise removing method, it is characterised in that described noise removing method, including:
Time schedule controller is utilized to produce sequential letter according to the noise signal produced on the public electrode detected
Number, and the clock signal of generation is supplied to D/A converting circuit, and wherein, the noise that public electrode produces
When signal is negative pulse, then the rising edge of the waveform of corresponding clock signal, the noise that public electrode produces letter
When number being positive pulse, then the trailing edge of the waveform of corresponding clock signal；
Utilize described D/A converting circuit that the clock signal that described time schedule controller provides is converted to the first simulation
Signal, and described first analogue signal is supplied to common electric voltage offer device, wherein, described first simulation
The waveform of signal is the inversion waveforms of the waveform of the noise signal produced on described public electrode, and the first simulation
The waveform of signal is identical with the voltage magnitude of the waveform of the noise signal produced on described public electrode, voltage side
To on the contrary；
Described common electric voltage is utilized to provide device by described first analogue signal and the common electrical with noise signal
Press superimposed, to generate the common electric voltage of the first elimination noise signal, and eliminate noise signal by described first
Common electric voltage be supplied to described public electrode.
Noise removing method the most according to claim 5, it is characterised in that further comprise the steps of:
Described common electric voltage is utilized to provide device that the common electric voltage that first eliminates noise signal is supplied to detection electricity
Road；
Whether the waveform utilizing the common electric voltage of described testing circuit detection the first elimination noise signal there is ripple
Dynamic, when there is fluctuation, then output control signal gives described D/A converting circuit；
Described D/A converting circuit is utilized to generate the second simulation letter according to the control signal that described testing circuit exports
Number；
Described common electric voltage is utilized to provide the second analogue signal of being generated by described D/A converting circuit of device and the
The common electric voltage of one elimination noise signal is superimposed, to generate the common electric voltage of the second elimination noise signal.
Noise removing method the most according to claim 6, it is characterised in that utilize described testing circuit
Whether the waveform of the common electric voltage of detection the first elimination noise signal fluctuates, when there is fluctuation, the most defeated
Go out control signal in described D/A converting circuit, including step:
Utilize described testing circuit by detect eliminate noise signal common electric voltage waveform fluctuation information with
The corresponding relation being stored in advance in inquiry table compares, and obtains described control signal.
Noise removing method the most according to claim 5, it is characterised in that further comprise the steps of:
Utilize described D/A converting circuit that described first analogue signal is supplied to conductive film, described common electrical
Pole senses the first analogue signal on described conductive film so that in described first analogue signal and public electrode
The noise signal produced is superimposed, and to eliminate the noise signal on common electric voltage, described conductive film is arranged at
In backlight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410126748.6A CN103913867B (en) | 2014-03-31 | 2014-03-31 | Liquid crystal display device and noise elimination method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410126748.6A CN103913867B (en) | 2014-03-31 | 2014-03-31 | Liquid crystal display device and noise elimination method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103913867A CN103913867A (en) | 2014-07-09 |
| CN103913867B true CN103913867B (en) | 2017-01-11 |
Family
ID=51039671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410126748.6A Active CN103913867B (en) | 2014-03-31 | 2014-03-31 | Liquid crystal display device and noise elimination method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103913867B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107437407B (en) * | 2017-08-11 | 2020-06-02 | 昆山龙腾光电股份有限公司 | Common voltage generating circuit and liquid crystal display device |
| TWI646837B (en) * | 2017-09-14 | 2019-01-01 | 友達光電股份有限公司 | An anti-interference display panel and an anti-interference signal line |
| CN111933078A (en) * | 2020-08-18 | 2020-11-13 | 合肥维信诺科技有限公司 | Organic light emitting diode driving circuit and display panel |
| CN113507329B (en) * | 2021-06-22 | 2022-06-17 | 厦门翔澧工业设计有限公司 | Glass backboard for filtering clutter and equipment with glass backboard |
| CN116704970B (en) * | 2023-08-04 | 2023-10-24 | 南京芯视元电子有限公司 | Correction system and method for display signal processing |
Citations (2)
| 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 |
| CN103188484A (en) * | 2011-12-27 | 2013-07-03 | 华晶科技股份有限公司 | Video coding/decoding device with three-dimensional noise quantization function and video coding method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1821175A1 (en) * | 2004-10-22 | 2007-08-22 | Sharp Kabushiki Kaisha | Display device with touch sensor, and drive method for the device |
-
2014
- 2014-03-31 CN CN201410126748.6A patent/CN103913867B/en active Active
Patent Citations (2)
| 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 |
| CN103188484A (en) * | 2011-12-27 | 2013-07-03 | 华晶科技股份有限公司 | Video coding/decoding device with three-dimensional noise quantization function and video coding method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103913867A (en) | 2014-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103913867B (en) | Liquid crystal display device and noise elimination method | |
| US9465497B2 (en) | Touch sensing system | |
| CN105867699B (en) | Display panel and touch-control pressure detection method | |
| CN104750330B (en) | Touch-sensing system | |
| TW574667B (en) | Input-output integrated type display device | |
| US10429967B2 (en) | In-cell touch type liquid crystal display device and method for driving the same | |
| CN103902094B (en) | Touch induction device and method | |
| KR101657215B1 (en) | Display device including touch panel device and coupling-noise elliminating method | |
| KR101778731B1 (en) | Display having touch sensor and driving method thereof | |
| CN104932738B (en) | Semiconductor device | |
| EP3306446B1 (en) | Display device having integrated touch function and driving method thereof | |
| CN109753952B (en) | Circuit with full-screen recognition and detection functions and equipment thereof | |
| CN203133794U (en) | Touch screen | |
| CN105355186B (en) | Driving circuit, touch-control display panel and its driving method, touch control display apparatus | |
| CN105118464B (en) | A kind of GOA circuits and its driving method, liquid crystal display | |
| CN203894514U (en) | Display panel and display device | |
| CN106097950B (en) | Display device | |
| US20150378472A1 (en) | Touch sensing display and sensing method thereof | |
| CN103186308A (en) | Touch screen and driving method thereof | |
| CN107861660A (en) | A kind of touch control detection device and its touch control detecting method | |
| CN106940500A (en) | Array base palte, display panel, the driving method of display device and array base palte | |
| CN105609073A (en) | Drive circuit, drive method, and display apparatus | |
| CN104991675B (en) | touch display drive method, drive module and display device | |
| CN104199577A (en) | Method and circuit of providing synchronous signals for touch panel by display panel | |
| CN104765519B (en) | Touch control detection circuit and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee after: Kunshan Longteng Au Optronics Co Address before: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee before: Kunshan Longteng Optronics Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |