CN103903573A - Time sequence scrambling method and time sequence control device thereof - Google Patents
Time sequence scrambling method and time sequence control device thereof Download PDFInfo
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- CN103903573A CN103903573A CN201210572502.2A CN201210572502A CN103903573A CN 103903573 A CN103903573 A CN 103903573A CN 201210572502 A CN201210572502 A CN 201210572502A CN 103903573 A CN103903573 A CN 103903573A
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Abstract
The invention discloses a time sequence scrambling method which is used in a time sequence control device corresponding to a plurality of source drive devices. The time sequence scrambling method comprises the following steps: a selection signal is adjusted according to a clock signal; a scrambling code generation unit is selected from a plurality of scrambling code generation units according to the selection signal to generate a time sequence scrambling signal; and a plurality of scrambling data corresponding to the plurality of source drive devices are generated separately according to the time sequence scrambling signal.
Description
Technical field
The present invention relates to a kind of sequential upset method and time sequence control device thereof, especially relate to a kind of sequential upset method and time sequence control device thereof that can temporal evolution produces the sequential jammer signal of different random degree.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD) has the advantages such as the little and low power consuming of frivolous, the low radiation of external form, volume, is widely used on the information products such as notes type counter or flat-surface television.Therefore, liquid crystal display replaces traditional cathode-ray tube display (Cathode Ray Tube Display) gradually becomes the market mainstream, wherein most popular with active matrix Thin Film Transistor-LCD (Active Matrix TFT LCD) again.In simple terms, the drive system of active matrix Thin Film Transistor-LCD is to be formed with gate driver (Gate Driver) by time schedule controller (Timing Controller), source electrode driver (Source Driver).Source electrode driver and gate driver are controlled respectively data line (Data Line) and sweep trace (Scan Line), and 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 is first delivered to sweep signal transistorized gate, make transistor turns, then the data-switching that source electrode driver is sent time schedule controller here becomes after output voltage, output voltage is delivered to transistorized source electrode, now the voltage of liquid crystal one end can equal the voltage of transistor drain, and according to the angle of inclination of drain voltage change liquid crystal molecule, and then change transmittance reaches the object that shows different colours.
The driving signal of source electrode controller is produced by time schedule controller (timing controller).Because liquid crystal display now need to be supported the resolution of high standard, therefore between source electrode driver and time schedule controller, need transmission interface at a high speed or more transmission channel transmits data.But, between source electrode driver and time schedule controller, transmit a large amount of fixed datas and high-frequency signal and cause Electromagnetic Interference (Electric Magnetic Interruption, EMI) to rise in a large number.Known technology is conventionally by dwindling the amplitude of oscillation, the spread spectrum clock generator (Spread Spectrum Clock Generator, SSCG) of signal between source electrode driver and time schedule controller or upsetting coding (Scrambling Code) 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 schematic diagram of upsetting a known time schedule controller 10 of encoding.As shown in Figure 1, the sequential jammer signal that time schedule controller 10 produces by scrambler generation unit 100, after the data D_SD1～D_SDN that corresponds respectively to source electrode driver SD1～SDN is upset, produce and upset data SD_SD1～SD_SDN to source electrode driver SD1～SDN.Then, source electrode driver SD1～SDN produces identical sequential jammer signal by scrambler generation unit 100 in source electrode driver SD1～SDN again, by the upset data decoding receiving, with restoring data.The distribution meeting of Electromagnetic Interference on frequency spectrum is more average thus, reaches the target that reduces Electromagnetic Interference.
But if data D_SD1～D_SDN immobilizes, because known technology only uses fixing scrambler generation unit 100, the jammer signal that time schedule controller 10 produces still has similar pattern.Under this situation, the effect that adopts known upset coding method to reduce Electromagnetic Interference is limited
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, further to reduce 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 driving devices.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 driving devices.
The present invention also discloses a kind of time sequence control device.This time sequence control device comprises a control signal generation module, is used for according to a clock signal, adjusts one and selects signal; And multiple data generating module, corresponding to multiple source electrode generators, each data generating module comprises multiple scrambler generation units, is used for producing multiple sequential jammer signal; One selected cell, is coupled to this control signal generation module, is used for according to this selection signal, by selecting a sequential jammer signal to upset input signal as one in the plurality of sequential jammer signal; And one upset unit, be coupled to this selected cell, be used for upsetting input signal and the source drive data corresponding to corresponding source electrode generator according to this, produce one upset data.
Accompanying drawing explanation
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 period
Embodiment
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 is used for data D_SD1～D_SDN to upset after coding, produces and upsets data SD_SD1～SD_SDN and export respectively source electrode driver SD1～SDN to.As shown in Figure 2, time sequence control device 20 comprises a selection signal generator module 200 and multiple data generating module 202.Select signal generator module 200 to be used for according to a clock signal clk, adjust one and select signal SEL.In one embodiment, select signal generator module 200 to can be a counter.Each data generating module 202 comprises that a selected cell MUX, scrambler generation unit SG1～SGM and one upset cell S CR.Data generating module 202 is used for according to selecting signal SEL and data D_SD1～D_SDN, produce to upset data SD_SD1～SD_SDN, and exports corresponding source electrode driver to by upsetting data SD_SD1～SD_SDN.Thus, time sequence control device 20 can, according to clock signal clk, be selected different scrambling codes generation unit to upset coding at different time, and then make the random degree on the transmission channel generation time between time sequence control device 20 and source electrode driver SD1～SDN.Thus, the random degree summation of transmission channel can obtain lifting, and the Electromagnetic Interference of transmission channel can be further reduced.
Specifically, select signal generator module 200 in the time that clock signal clk indicates next clock period to start, adjust and select signal SEL, so that the selected cell MUX of each data generating module 202 selected the sequential jammer signal of the scrambler generation unit generation different from a upper clock period as upsetting input signal SCR_IN.Thus, upsetting cell S CR can, in the different clocks cycle, produce and upset data SD_SD1～SD_SDN by the clock jammer signal that different scrambling codes generation unit produces.Subsequently, source electrode controller 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 scrambler generation units to produce to be used in to upset the sequential jammer signal of coding, the random degree on can generation time in the transmission channel between time sequence control device 20 and source electrode driver SD1～SDN.The Electromagnetic Interference of transmission channel can be further reduced.It should be noted that, even not temporal evolution and changing of data D_SD1～D_SDN, produced by different scrambling codes generation unit owing to upsetting input signal, therefore, upset data SD_SD1～SD_SDN that upset cell S CR produces still has the random degree of certain degree, thereby reaches the effect that reduces Electromagnetic Interference.
Mutual relationship 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 indication selected cell MUX to select scrambler generation unit SG1.And in the time that clock periodic signal CLK indicates that next clock period, T2 started, select signal SEL to change indication into and select scrambler generation unit SG2, all the other are by that analogy.That is to say, along with the clock period of clock period signal CLK indication is converted into clock period TM by clock period T1, select the indicated scrambler generation unit of signal SEL to be also changed to scrambler generation unit SGM by scrambler generation unit SG1.Accordingly, time sequence control device 20 can be in the transmission channel between time sequence control device 20 and source electrode driver SD1～SDN the random degree on generation time.
It should be noted that, main spirits of the present invention is along with the time changes, produce and be used in the sequential jammer signal that upsets coding by different scrambler generation unit, and then reach on the transmission channel between clock control device and source electrode driver the object of random degree on generation time.Accordingly, the electromagnetic interference (EMI) of the transmission channel between clock control device and source electrode driver is further reduced.According to different application, those skilled in the art should implement suitable change and variation according to this.For instance, in scrambler generation unit SG1～SGM, can comprise a scrambler generation unit, the random degree of the sequential jammer signal that it produces is 0.In other words,, in the time choosing this scrambler generation unit, upset data SD_SD1～SD_SDN that upset cell S CR produces is equal to data D_SD1～D_SDN.Thus, can further reduce Electromagnetic Interference.
In addition, the mutual relationship between producing about time of above-described embodiment and scrambler, below list lattice separately illustrate:
| CLK | T1 | T2 | … | TM |
| SEL | SG1 | SG1 | … | SGM |
（2）
From form (2), in clock period T1, T2, selecting the indicated scrambler generation unit of signal SEL is all scrambler generation unit SG1.And, in clock period T3～TM, select signal SEL also can indicate scrambler generation unit SG1.That is to say, the selecteed time span of scrambler generation unit SG1 and frequency increase, thereby promote the temporal random degree of transmission channel between time sequence control device 20 and source electrode driver SD1～SDN.In brief, time sequence control device 20 can, by changing the selecteed time span of each scrambler 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 a sequential upset method 30 about time sequence control device 20.Please refer to Fig. 3, should be noted, if there is identical in fact result, sequential upset method 30 is not limited with the order of process flow diagram 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, produce a sequential jammer signal.
Step 306: according to this sequential jammer signal, produce the multiple upset data that correspond respectively to multiple source electrode driving devices.
Step 308: finish.
According to sequential upset method 30, the random degree of upsetting data can be raised, thereby reduces further the Electromagnetic Interference that time sequence control device produces.Detailed operating process about sequential upset method 30 can, with reference to above-mentioned, for the sake of clarity, be not repeated herein.
In sum, above-described embodiment disclosed sequential upset method and time sequence control device thereof can be according to clock period signals, in the different clock period, select different scrambler generation units to produce to be used in to upset the sequential jammer signal of coding, 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-described embodiment 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 a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a sequential upset method, is used in the time sequence control device corresponding to multiple source electrode driving devices, and this sequential upset method 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 jammer signal; And
According to this sequential jammer signal, produce the multiple upset data that correspond respectively to the plurality of source electrode driving device.
2. sequential upset method as claimed in claim 1, is characterized in that, according to this clock signal, the step of adjusting this selection signal comprises:
In the time that this clock signal is indicated through a clock period, adjust this selection signal.
3. sequential upset method as claimed in claim 1, is characterized in that, according to this clock signal, the step of adjusting this selection signal comprises:
In the time that this clock signal is indicated through a clock period, 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 a scrambler generation unit of zero.
5. a time sequence control device, comprising:
One control signal generation module, is used for according to a clock signal, adjusts one and selects signal; And
Multiple data generating module, corresponding to multiple source electrode generators, each data generating module comprises:
Multiple scrambler generation units, are used for producing multiple sequential jammer signal;
One selected cell, is coupled to this control signal generation module, is used for according to this selection signal, by selecting a sequential jammer signal to upset input signal as one in the plurality of sequential jammer signal; And
One upsets unit, is coupled to this selected cell, is used for upsetting input signal and the source drive data corresponding to corresponding source electrode generator according to this, produces one and upsets data.
6. time sequence control device as claimed in claim 5, it is characterized in that this control signal generation module is in the time that this clock signal is indicated through a clock period, adjust this control signal, so that this selected cell selects the clock jammer signal different from this clock period as upsetting input signal.
7. time sequence control device as claimed in claim 5, it is characterized in that this control signal generation module is in the time that this clock signal is indicated through a clock period, maintain this control signal, so that this selected cell selects the clock jammer signal identical with this clock period as upsetting input signal.
8. time sequence control device as claimed in claim 5, is characterized in that the plurality of scrambler generation unit of each data generating module comprises that random degree is a scrambler generation unit of zero.
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| CN107068112A (en) * | 2017-06-05 | 2017-08-18 | 青岛海信电器股份有限公司 | Method of adjustment and device for electromagnetic interference peak value in display device |
| CN107615700A (en) * | 2015-05-20 | 2018-01-19 | 堺显示器制品株式会社 | Circuit and display device |
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| 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 |
| CN110277047A (en) * | 2019-05-31 | 2019-09-24 | 北京集创北方科技股份有限公司 | Reduce the method and device of the electromagnetic interference during display driving |
| 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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