CN103903573B - Sequential upset method and time sequence control device thereof - Google Patents
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Abstract
The invention discloses a kind of sequential upset method, be used in the time sequence control device corresponding to multiple source electrode drivers. This sequential upset method comprises according to a clock signal, adjusts one and selects signal; According to this selection signal, in multiple scrambler generation units, select a scrambler generation unit, produce a sequential jammer signal; And according to this sequential jammer signal, produce the multiple upset data that correspond respectively to multiple source electrode drivers.
Description
Technical field
The present invention relates to a kind of sequential upset method and time sequence control device thereof, especially relating to one can produce by temporal evolutionSequential upset method and the time sequence control device thereof of the sequential jammer signal of different random degree.
Background technology
Liquid crystal display (LiquidCrystalDisplay, LCD) has frivolous, the low radiation of external form, volume is little and lowThe advantages such as power consumption, are widely used on the information products such as notes type calculator or flat-surface television. Therefore, liquid crystal display byGradually replacing traditional cathode-ray tube display (CathodeRayTubeDisplay) becomes the market mainstream, wherein again with masterMoving matrix form Thin Film Transistor-LCD (ActiveMatrixTFTLCD) is most popular. In simple terms, active-matrixThe drive system of formula Thin Film Transistor-LCD is by time schedule controller (TimingController), source driveDevice (SourceDriver) is to be formed with gate driver (GateDriver). Source electrode driver and gate driver are respectivelyControl data wire (DataLine) and scan line (ScanLine), it mutually intersects to form circuit unit matrix on panel,And each circuit unit (Cell) comprises liquid crystal molecule and transistor. The displaying principle of liquid crystal display is that gate pole driver first willSweep signal is delivered to transistorized gate, makes transistor turns, and the data that then source electrode driver is sent time schedule controller here turnChange into after output voltage, output voltage is delivered to transistorized source electrode, now the voltage of liquid crystal one end can equal transistor drainVoltage, and change the angle of inclination of liquid crystal molecule according to drain voltage, and then change light transmittance and reach and show different coloursObject.
The driving signal of source electrode driver is produced by time schedule controller (timingcontroller). Due to nowLiquid crystal display need to support the resolution ratio of high standard, therefore between source electrode driver and time schedule controller, need transmission at a high speedInterface or more transmission channel transmits data. But, between source electrode driver and time schedule controller, transmit a large amount of consolidatingGiven data and high-frequency signal cause Electromagnetic Interference (ElectricMagneticInterruption, EMI) to rise in a large number.Known technology is conventionally by dwindling the amplitude of oscillation, the spread spectrum clock generator (Spread of signal between source electrode driver and time schedule controllerSpectrumClockGenerator, SSCG) or upset coding (ScramblingCode) and reduce Electromagnetic Interference.Wherein, again with by upset the systematicness of data lower Electromagnetic Interference upset coding the most common.
Please refer to Fig. 1, Fig. 1 is used in a liquid crystal display to adopt the signal of upsetting a known time schedule controller 10 of encodingFigure. As shown in Figure 1, the sequential jammer signal that time schedule controller 10 produces by scrambler generation unit 100, will correspond respectively toAfter data D_SD1～D_SDN of source electrode driver SD1～SDN upsets, produce and upset data SD_SD1～SD_SDN and drive to source electrodeMoving device SD1～SDN. Then, source electrode driver SD1～SDN is again by scrambler generation unit 100 in source electrode driver SD1～SDNProduce identical sequential jammer signal, by the upset data decoding receiving, with restoring data. Electromagnetic Interference exists thusDistribution meeting on frequency spectrum is more average, reaches the target that reduces Electromagnetic Interference.
But, if data D_SD1～D_SDN immobilizes, because known technology only uses fixing scrambler generation unit100, the jammer signal that time schedule controller 10 produces still has similar pattern. Under this situation, adopt known upset codingIt is limited that method reduces the effect of Electromagnetic Interference
Summary of the invention
Therefore, the present invention proposes a kind of sequential upset method and time sequence control device thereof of joining day concept, to enter oneStep reduces Electromagnetic Interference.
The present invention discloses a kind of sequential upset method, is used in the time sequence control device corresponding to multiple source electrode drivers.This sequential upset method comprises according to a clock signal, adjusts one and selects signal; According to this selection signal, produce at multiple scramblersIn unit, select a scrambler generation unit, produce a sequential jammer signal; And according to this sequential jammer signal, produce respectivelyCorresponding to multiple upset data of multiple source electrode drivers.
The present invention also discloses a kind of time sequence control device. This time sequence control device comprises a selection signal generator module, usesCome according to a clock signal, adjust one and select signal; And multiple data generating module, corresponding to multiple source electrode drivers, everyOne data generating module comprises multiple scrambler generation units, is used for producing multiple sequential jammer signal; One selected cell, is coupled toThis selection signal generator module, is used for according to this selection signal, by selecting a sequential to upset letter in the plurality of sequential jammer signalNumber upset input signal as one; And one upset unit, be coupled to this selected cell, be used for according to this upset input signal withAnd corresponding to the source drive data of corresponding source electrode driver, produce one and upset data.
Brief description of the drawings
Fig. 1 is the schematic diagram that a known time schedule controller is used in a liquid crystal display.
Fig. 2 is the schematic diagram of the embodiment of the present invention one time sequence control device.
Fig. 3 is the schematic diagram of a sequential upset method of the embodiment of the present invention.
Wherein, description of reference numerals is as follows:
10 time schedule controllers
100 scrambler generation units
20 time sequence control devices
200 select signal generator module
202 data generating module
30 sequential upset methods
300～308 steps
CLK clock signal
D_SD1～D_SDN data
MUX selected cell
SCR_IN upsets input signal
SD1～SDN source electrode driver
SD_SD1～SD_SDN upsets data
SEL selects signal
SG1～SGM scrambler generation unit
T1～TM clock cycle
Detailed description of the invention
Please refer to Fig. 2, Fig. 2 is the schematic diagram of the embodiment of the present invention one time sequence control device 20. Time sequence control device 20 useData D_SD1～D_SDN is upset after coding, produce and upset data SD_SD1～SD_SDN and export respectively source electrode toDriver SD1～SDN. As shown in Figure 2, time sequence control device 20 comprises a selection signal generator module 200 and multiple dataGeneration module 202. Select signal generator module 200 to be used for according to a clock signal clk, adjust one and select signal SEL. Real oneExecute in example, select signal generator module 200 to can be a counter. Each data generating module 202 comprise a selected cell MUX,Scrambler generation unit SG1～SGM and one upsets cell S CR. Data generating module 202 be used for according to select signal SEL andData D_SD1～D_SDN, produces and upsets data SD_SD1～SD_SDN, and upset data SD_SD1～SD_SDN is exported toCorresponding source electrode driver. Thus, time sequence control device 20 can, according to clock signal clk, be selected at different timeDifferent scrambling codes generation unit is upset coding, and then makes the biography between time sequence control device 20 and source electrode driver SD1～SDNRandom degree on defeated passage generation time. Thus, the random degree summation of transmission channel can obtain lifting, the electromagnetic wave of transmission channelInterference can be further reduced.
Specifically, select signal generator module 200 in the time that clock signal clk indicates next clock cycle to start, adjustSelect signal SEL, so that the selected cell MUX of each data generating module 202 selected the scrambler different from a upper clock cycleThe sequential jammer signal that generation unit produces is as upsetting input signal SCR_IN. Thus, upsetting cell S CR can be notThe same clock cycle, produce and upset data SD_SD1～SD_ by the clock jammer signal that different scrambling codes generation unit producesSDN. Subsequently, source electrode driver SD1～SDN also, by identical selection signal SEL, selects identical scrambler generation unit,With restoring data correctly. In other words,, by according to clock signal clk, in the different clocks cycle, select different scramblers to produceRaw unit produces and is used in the sequential jammer signal that upsets coding, between time sequence control device 20 and source electrode driver SD1～SDNRandom degree on can generation time in transmission channel. The Electromagnetic Interference of transmission channel can be further reduced. It should be noted thatEven if not temporal evolution and changing of data D_SD1～D_SDN is by not owing to upsetting input signal within the different clocks cycleProduce with scrambler generation unit, therefore, upset data SD_SD1～SD_SDN that upset cell S CR produces still has quiteThe random degree of degree, thus reach the effect that reduces Electromagnetic Interference.
Correlation between producing about time of above-described embodiment and scrambler, below list lattice illustrate:
| CLK | T1 | T2 | … | TM |
| SEL | SG1 | SG2 | … | SGM |
(1)
As shown in form (1), in the time that clock periodic signal CLK indicates a clock cycle T 1 to carry out, select signal SEL instructionSelected cell MUX selects scrambler generation unit SG1. And in the time that clock periodic signal CLK indicates that next clock cycle, T2 started, choosingSelect signal SEL and change instruction selection scrambler generation unit SG2 into, all the other by that analogy. That is to say, along with clock cycle signalThe clock cycle of CLK instruction is converted into clock cycle TM by clock cycle T1, selects the indicated scrambler generation unit of signal SELAlso be changed to scrambler generation unit SGM by scrambler generation unit SG1. Accordingly, time sequence control device 20 can be at time sequence control device20 and source electrode driver SD1～SDN between transmission channel on random degree on generation time.
It should be noted that main spirits of the present invention is along with the time changes, by different scrambler generation unitsGeneration is used in the sequential jammer signal that upsets coding, and then reaches the transmission channel between clock control device and source electrode driverThe object of random degree on upper generation time. Accordingly, the electromagnetic interference quilt of the transmission channel between clock control device and source electrode driverFurther reduce. According to different application, those skilled in the art should implement suitable change and variation according to this. Come for exampleSay, in scrambler generation unit SG1～SGM, can comprise a scrambler generation unit, the random degree of the sequential jammer signal that it produces is0. In other words, in the time choosing this scrambler generation unit, upset data SD_SD1～SD_SDN that upset cell S CR produces etc.Be same as data D_SD1～D_SDN. Thus, can further reduce Electromagnetic Interference.
In addition, the correlation between producing about time of above-described embodiment and scrambler, below list lattice separately illustrate:
(2)
From form (2), in clock cycle T1, T2, select the indicated scrambler generation unit of signal SEL all for disturbingCode generation unit SG1. And, in clock cycle T3～TM, select signal SEL also can indicate scrambler generation unit SG1. AlsoBe to say, the selecteed time span of scrambler generation unit SG1 and frequency increase, and drive with source electrode thereby promote time sequence control device 20The temporal random degree of transmission channel between moving device SD1～SDN. In brief, time sequence control device 20 can be by changing each scramblerThe selecteed time span of generation unit or frequency, increase the random degree of upsetting data SD_SD1～SD_SDN.
Along with the time produces the mode of different sequential jammer signal, can further summarize one about time sequence control device 20Sequential upset method 30. Please refer to Fig. 3, should be noted, if there is identical in fact result, sequential upset method 30 alsoBe not limited with the order of flow chart shown in Fig. 3. Sequential upset method 30 can be applicable to a time sequence control device, and comprises:
Step 300: start.
Step 302: according to a clock signal, adjust one and select signal.
Step 304: according to this selection signal, select a scrambler generation unit in multiple scrambler generation units, produceOne sequential jammer signal.
Step 306: according to this sequential jammer signal, produce the multiple upset numbers that correspond respectively to multiple source electrode driversAccording to.
Step 308: finish.
According to sequential upset method 30, the random degree of upsetting data can be raised, thereby reduces further SECO dressThe raw Electromagnetic Interference of buying property. Can be with reference to above-mentioned about the detailed operating process of sequential upset method 30, for the sake of clarity, at this notRepeat.
In sum, above-described embodiment disclosed sequential upset method and time sequence control device thereof can be according to the clock cycleSignal is selected different scrambler generation units to produce and is used in the sequential upset letter of upsetting coding in the different clock cycleNumber, thereby further reduce the generation of Electromagnetic Interference. Even if it should be noted that input data do not change for a long time, above-mentionedEmbodiment disclosed sequential upset method and time sequence control device thereof still can effectively reach the effect that reduces Electromagnetic Interference.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this areaArt personnel, the present invention can have various modifications and variations. Within the spirit and principles in the present invention all, to do any repairingProtection scope of the present invention changes, be equal to replacement, improvement etc., within all should be included in.
Claims (8)
1. a sequential upset method, is used in the time sequence control device corresponding to multiple source electrode drivers, this sequential upset sideMethod comprises:
According to a clock signal, adjust one and select signal;
According to this selection signal, in multiple scrambler generation units, select a scrambler generation unit, produce a sequential and upset letterNumber; And
According to this sequential jammer signal, produce the multiple upset data that correspond respectively to the plurality of source electrode driver.
2. sequential upset method as claimed in claim 1, is characterized in that according to this clock signal, adjusts this selection signalStep comprises:
In the time that this clock signal is indicated through a clock cycle, adjust this selection signal.
3. sequential upset method as claimed in claim 1, is characterized in that according to this clock signal, adjusts this selection signalStep comprises:
In the time that this clock signal is indicated through a clock cycle, maintain this selection signal.
4. sequential upset method as claimed in claim 1, is characterized in that the plurality of scrambler generation unit comprises that random degree is zeroA scrambler generation unit.
5. a time sequence control device, comprising:
One selects signal generator module, is used for according to a clock signal, adjusts one and selects signal; And
Multiple data generating module, corresponding to multiple source electrode drivers, each data generating module comprises:
Multiple scrambler generation units, are used for producing multiple sequential jammer signal;
One selected cell, is coupled to this selection signal generator module, is used for according to this selection signal, upsets letter by the plurality of sequentialIn number, select a sequential jammer signal to upset input signal as one; And
One upsets unit, is coupled to this selected cell, is used for upsetting input signal and driving corresponding to corresponding source electrode according to thisThe source drive data of moving device, produce one and upset data.
6. time sequence control device as claimed in claim 5, is characterized in that this selection signal generator module is in this clock signalWhile indicating through a clock cycle, adjust this selection signal, so that this selected cell is selected the clock different from this clock cycleJammer signal is as upsetting input signal.
7. time sequence control device as claimed in claim 5, is characterized in that this selection signal generator module is in this clock signalWhile indicating through a clock cycle, maintain this selection signal, so that this selected cell is selected the clock identical with this clock cycleJammer signal is as upsetting input signal.
8. time sequence control device as claimed in claim 5, is characterized in that the plurality of scrambler of each data generating module producesRaw unit comprises that random degree is a scrambler generation unit of zero.
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| US10515578B2 (en) * | 2015-05-20 | 2019-12-24 | Sakai Display Products Corporation | Electrical circuit and display apparatus |
| CN106231227B (en) * | 2016-08-06 | 2020-04-21 | 武汉精测电子集团股份有限公司 | Apparatus for transmitting and converting image signal |
| CN107068112B (en) * | 2017-06-05 | 2019-09-10 | 青岛海信电器股份有限公司 | For showing the method for adjustment and device of electromagnetic interference peak value in equipment |
| CN108696288B (en) * | 2017-06-09 | 2022-02-01 | 京东方科技集团股份有限公司 | Signal transmission method, transmitting unit, receiving unit and display device |
| CN109586849A (en) * | 2018-12-17 | 2019-04-05 | 深圳市华星光电半导体显示技术有限公司 | Data transmission method and device |
| CN110277047B (en) * | 2019-05-31 | 2022-11-22 | 北京集创北方科技股份有限公司 | Method and device for reducing electromagnetic interference in display driving process |
| TWI701652B (en) * | 2019-05-31 | 2020-08-11 | 大陸商北京集創北方科技股份有限公司 | Source drive module, liquid crystal display and information processing device |
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| CN100392718C (en) * | 2004-03-09 | 2008-06-04 | 统宝光电股份有限公司 | data driver and driving method |
| JP4805900B2 (en) * | 2007-11-30 | 2011-11-02 | ザインエレクトロニクス株式会社 | Video signal transmitting apparatus, video signal receiving apparatus, and video signal transmission system |
| TWI401583B (en) * | 2009-08-06 | 2013-07-11 | Phison Electronics Corp | Data scramble and reverse-scranble method, data processing method, and controller and storage system thereof |
| US8362997B2 (en) * | 2010-02-12 | 2013-01-29 | Au Optronics Corporation | Display with CLK phase or data phase auto-adjusting mechanism and method of driving same |
| KR101788860B1 (en) * | 2010-08-27 | 2017-10-23 | 엘지디스플레이 주식회사 | Liquid crystal display |
| KR20120065840A (en) * | 2010-12-13 | 2012-06-21 | 삼성전자주식회사 | Display driver circuit, operating method thereof, and user device including that |
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