CN101888224B - Generation method of control signal and device thereof - Google Patents
Generation method of control signal and device thereof Download PDFInfo
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- CN101888224B CN101888224B CN2009101363660A CN200910136366A CN101888224B CN 101888224 B CN101888224 B CN 101888224B CN 2009101363660 A CN2009101363660 A CN 2009101363660A CN 200910136366 A CN200910136366 A CN 200910136366A CN 101888224 B CN101888224 B CN 101888224B
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Abstract
The invention provides a generation method of a control signal and a device thereof. The method comprises the following steps: firstly, generating a reset parameter by virtue of a data enabling signal and a frequency signal, wherein, the reset parameter indicates the period of the data enabling signal; sequentially generating a count value according to the reset parameter and the positive rising edge of the data enabling signal; and finally generating the control signal according to the count value. In the invention, the control signal can be continuously generated when the data enabling signal stops change to apply to various driving techniques.
Description
Technical field
The invention relates to a kind of production method of control signal, and particularly relevant for a kind of uninterruptedly production method of the control signal of (Free Run).
Background technology
LCD (Liquid Crystal Display, LCD) the panel driving signal mainly is divided into two partly, the data-signal that provided for source electrode driver (Source Driver), another is the sweep signal that gate drivers (Gate Driver) is provided.Data-signal mainly provides each pixel gray level pairing voltage signal.Sweep signal is in order to control the switching signal of each row pixel voltage input, and sweep signal is for pursuing column scan.LCD must (TimingController, TCON) output control signal S drives source electrode driver and the gate drivers that is positioned on the panel module, to show correct image by time schedule controller.Time schedule controller is appeared the required control signal S of version in generation must be according to data actuating signal DE (Data Enable) generation in the input signal of video signal; Because the data actuating signal DE in the input signal of video signal is not continual signal; So when data actuating signal DE stops to change; When just data actuating signal DE was interrupted, control signal S also stopped to produce thereupon.
Fig. 1 is the synoptic diagram of the generation control signal of known technology.Please with reference to Fig. 1, when data actuating signal DE continued the output square wave, along with the transition variation of data actuating signal DE, control signal S also produced corresponding square wave thereupon.When data actuating signal DE kept low level and no longer changes, control signal S can only keep definite value, can't produce square wave more thereupon, so that can't the application data black plug drives and technology such as multi-field wide viewing angle panel driving.
Summary of the invention
The present invention provides a kind of production method of control signal, can when data actuating signal stops to change, still can continue to produce control signal.
The present invention provides a kind of generation device of control signal, can when data actuating signal stops to change, produce continual control signal, to use various actuation techniques.
The present invention proposes a kind of generation device of control signal, comprises a frequency signal generator, one first counter and a control signal generator.Wherein, frequency signal generator for generating one frequency signal.First counter is in order to receiving a data actuating signal and frequency signal, and produces a parameter reconfiguration.Second counter produces a count value in order to the rising edge according to a little parameter reconfigurations and data actuating signal.In addition, the control signal generator is in order to produce a control signal according to count value.
The present invention proposes a kind of production method of control signal, comprises the following steps.At first, utilize a data actuating signal and a frequency signal to produce a parameter reconfiguration.Then, the rising edge according to parameter reconfiguration and data actuating signal produces a count value.Produce a control signal according to count value afterwards.
In one embodiment of this invention, the step of above-mentioned generation parameter reconfiguration comprises: utilize data actuating signal and frequency signal to produce one first parameter value; Utilize data actuating signal and frequency signal to produce one second parameter value; And when first parameter value is identical with second parameter value, get second parameter value as parameter reconfiguration.
In one embodiment of this invention, the step that the above-mentioned rising edge according to parameter reconfiguration and data actuating signal produces count value comprises: when count value reaches parameter reconfiguration, and the replacement count value; And when the rising edge appearred in data actuating signal, the replacement count value was to obtain the count value according to the rising edge generation of parameter reconfiguration and data actuating signal.
Based on above-mentioned, the present invention can be when data actuating signal stops to change, and produces continual control signal according to cycle of data actuating signal, to use various actuation techniques.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and cooperates appended graphic elaborating as follows.
Description of drawings
Fig. 1 is the synoptic diagram of the generation control signal of known technology.
Fig. 2 is the calcspar according to the generation device of the control signal of one embodiment of the invention.
Fig. 3 is the process flow diagram according to the production method of a kind of control signal of one embodiment of the invention.
Fig. 4 is the process flow diagram of a kind of embodiment of step S302.
Fig. 5 is the process flow diagram of a kind of embodiment of step S304.
Fig. 6 is the process flow diagram of a kind of embodiment of step S306.
Fig. 7 is the synoptic diagram of production method of the control signal of Fig. 4-Fig. 6.
Fig. 8 is the process flow diagram of the another kind of embodiment of step S302.
Fig. 9 is the synoptic diagram of a kind of data actuating signal and parameter value.
Embodiment
The production method of known control signal; Though can produce according to the data actuating signal in the input signal of video signal with show image; But when data actuating signal stopped to change, control signal also stopped to produce thereupon, will make that so the application of actuation techniques is restricted.
In view of this, embodiments of the invention provide a kind of production method of control signal, can produce control signal with data actuating signal.When data actuating signal is normally exported, but the variation of data-driven enable signal is to produce control signal.When data actuating signal stops to change, still can continue to produce control signal, to use various actuation techniques according to the cycle of data actuating signal.Set forth embodiments of the invention in detail below with reference to accompanying drawing, the for example clear example embodiment of the present invention of accompanying drawing, wherein same or similar assembly or the step of same numeral indication.
Fig. 2 is the calcspar according to the generation device of the control signal of one embodiment of the invention.Please with reference to Fig. 2, in the present embodiment, control signal generator means 200 comprises a frequency signal generator 202, a counter 204, a counter 206, a buffer 208 and a control signal generator 210.In the present embodiment, frequency signal generator 202 couples counter 204 and counter 206.Buffer 208 couples counter 204 and counter 206.Control signal generator 210 couples counter 206.
Fig. 3 is the production method process flow diagram according to a kind of control signal of one embodiment of the invention.Please, at first, utilize a data actuating signal DE and a frequency signal P to produce a parameter reconfiguration R (step S302) with reference to Fig. 3.Then, the rising edge according to parameter reconfiguration and data actuating signal DE produces count value C (step S304).Afterwards, produce a control signal S (step S306) according to count value C.
Fig. 4-Fig. 6 is respectively the process flow diagram of a kind of embodiment of step S302, step S304 and step S306.Fig. 7 is the synoptic diagram according to the production method of the control signal of Fig. 4-Fig. 6.To cooperate Fig. 2 and Fig. 4-Fig. 7 that the production method of the control signal of present embodiment is explained in order to specify more below the step S302-step S306.
At first, please merge, utilize counter 204 to receive data actuating signal DE and frequency signal P, to produce one first parameter value (step S402) with reference to Fig. 2, Fig. 4 and Fig. 7.In detail, the frequency signal P that counter 204 reception data actuating signal DE capable of using and frequency signal generator 202 are produced is with the number of cycles of counting at one-period frequency signal P in the time of data actuating signal DE.Just count the number of cycles that arrives frequency signal P in the time of next rising edge in the rising edge of data actuating signal DE, to produce first parameter value.Wherein, the number of cycles of frequency signal P is first parameter value.
For instance, the one-period of data actuating signal DE is in the time in Fig. 7, and just the rising edge of square wave W1 is in the time of the rising edge of square wave W2, and the number of cycles of counter 204 count frequency signal P is to produce first parameter value.Can find out that by Fig. 7 first parameter value that counter 204 is produced is 2000.
Then, produce one second parameter value (step S404).In detail, after producing first parameter value.Then continue to utilize the number of cycles of counter 204, to produce second parameter value with frequency signal P in the cycle length of the next pulse wave signal of the method enumeration data enable signal DE of step S402.
For instance, in the cycle length of the next pulse wave signal of data actuating signal DE, just the rising edge of square wave W2 is in the time of the rising edge of square wave W3 in Fig. 7, and the number of cycles of counter 204 count frequency signal P is to produce second parameter value.Can find out that by Fig. 7 second parameter value that counter 204 is produced is 2000.
Then, judge this two parameter value whether identical (step S406).If then get second parameter value as parameter reconfiguration (step S408); If not, then get back to step S402 and continue to produce next parameter value.In detail, whether counter 204 basis for estimation data actuating signal DE capable of using are identical with resulting first parameter value of frequency signal P and second parameter value.If first parameter value equals second parameter value, then second parameter value is made as parameter reconfiguration R, and parameter reconfiguration R is sent to buffer 208 storages; If not, then get back to step S404, utilize counter 204 continuation to count the number of cycles of frequency signal P in the cycle length of next pulse wave signal, to produce next parameter value.
This note that when judge first parameter value and second parameter value inequality after, the next parameter value that counter 204 is produced will replace original second parameter value in step S404.In addition, then in step S406, two parameter values of being judged are the next parameter value and original second parameter value in step S404 that counter 204 is produced.So, counter 204 latter two parameter value that produces continuously as parameter reconfiguration R.
Though first parameter value and second parameter value that present embodiment has identical numerical value with continuous generation be as parameter reconfiguration R, in the practical application not as limit.The user can increase the parameter value number of sampling according to practical situation, to produce more accurate parameter reconfiguration R.For instance, in Fig. 7 counter 204 continuous counters five pulse wave signals of square wave W1-square wave W5, wherein the parameter value of square wave W1-square wave W5 is all 2000.Therefore, it is 2000 that counter 204 can be set parameter reconfiguration R, and parameter reconfiguration R is sent to buffer 208 storages.When counter 204 decides parameter reconfiguration R with more parameter values that produce continuously, parameter reconfiguration R will so can produce more stable control signal S more near the cycle of data actuating signal DE.
Then, please merge with reference to Fig. 2, Fig. 5 and Fig. 7, at first, the number of cycles of count frequency signal P is to produce count value C (step S502).Then, whether judgment data enable signal DE rising edge (step S504) occurs.If, the count value of then resetting C (step S506); If not, judge whether count value C equals parameter reconfiguration R (step S508).If, the count value of then resetting C (step S506); Then get back to the number of cycles of step S502 continuation count frequency signal P if not.
In detail, can utilize counter 206 to come the number of cycles of the frequency signal P that count frequency signal generator 202 produced, to produce count value C, wherein, count value C is the number of cycles of frequency signal P.Then, can utilize counter 206 to receive the stored parameter reconfiguration R of data actuating signal DE, frequency signal P and buffer 208.When the number of cycles of counter 206 at count frequency signal P, if the rising edge appears in data actuating signal DE, then counter 206 count value C that the number of cycles of count frequency signal P is obtained resets, and continues the number of cycles of count frequency signal P; If the rising edge does not appear in data actuating signal DE, then when count value C added up to parameter reconfiguration R, counter 206 was reset count value C, and continued the number of cycles of count frequency signal P.So utilize counter 206 number of cycles of count frequency signal P repeatedly, to obtain count value C according to the rising edge generation of parameter reconfiguration R and data actuating signal DE.
For instance, in Fig. 7, when data actuating signal DE still continued output, when count value C the rising edge occurred at data actuating signal DE, the counter 206 count value C that just resets got back to 1 with counting again.In addition, when data actuating signal DE stopped to change, count value C accumulative total was during to parameter reconfiguration R (numerical value is 2000), and the counter 206 count value C that also can reset gets back to 1 with counting again.
Afterwards, please merge with reference to Fig. 2, Fig. 6 and Fig. 7.At first, set one first default value and one second default value (step S602).Then, read count value C (step S604).Then, judge whether count value C equals first default value (step S606).If, then transfer control signal S to high levle (step S608) by low level, get back to step S604 then; If not, judge then whether count value C equals second default value (step S610).If, then transfer control signal S to low level (step S612) by high levle, get back to step S604 then; If not, then get back to step S604.
In detail, can set one first default value and one second default value in control signal generator 210, wherein first default value is less than second default value.Then, control signal generator 210 reads the count value C that counter 206 is produced.Afterwards, control signal generator 210 judges whether count value C equals first default value.If count value C is not equal to first default value, then counter 206 continues the then number of cycles of count frequency signal P, so that count value C continues to increase.If count value C accumulative total is to first default value, then control signal generator 210 transfers control signal S to high levle by low level, and counter 206 continues the then number of cycles of count frequency signal P, so that count value C continues to increase.Afterwards, control signal generator 210 judges whether count value C equals second default value.If count value C is not equal to second default value, then counter 206 continues the then number of cycles of count frequency signal P, so that count value C continues to increase.If count value C equals second default value, then control signal generator 210 transfers control signal S to low level by high levle, and counter 206 continues the then number of cycles of count frequency signal P, so that count value C continues to increase.
For instance, please with reference to the embodiment of Fig. 7, it is that 1910, second default value is 1920 that present embodiment is set first default value.When count value C accumulative total to 1910 the time, control signal S transfers high levle to by low level; When count value C accumulative total to 1920 the time, control signal S transfers low level to by high levle.Though present embodiment produces the control signal S to change with first default value and default value, in the practical application not as limit.The user can be according to the more default value number of the required setting of practical situation, or sets when count value C accumulative total and export corresponding pulse wave signal during to different default value, can use the control signal S of required actuation techniques with generation.
Though the production method and the device thereof of control signal have been depicted a possible kenel in the foregoing description; But having common knowledge the knowledgeable in the affiliated technical field should know; Each manufacturer is all different for the production method and the Design of device thereof of control signal, and therefore application of the present invention is when being not restricted to the possible kenel of this kind.In other words, so long as when data actuating signal stops to change, still the cycle according to data actuating signal continues the output control signal, just has been to have met spirit of the present invention place.Below lift several embodiments again so that this area has the understanding spirit of the present invention that common knowledge the knowledgeable can be further, and embodiment of the present invention.
In addition, in the above-described embodiments, the step S402 that Fig. 4 disclosed～S408 only is a kind of selection embodiment of step S302, and the present invention is not as limit.In other embodiments, have the knack of art technology person data actuating signal DE also capable of using and frequency signal P and otherwise produce parameter reconfiguration R (step S302).In detail, Fig. 8 is the process flow diagram of the another kind of embodiment of step S302.Please merge with reference to Fig. 2 and Fig. 8, counter 204 capable of using produces multiple parameter values (step S802) according to data actuating signal DE and frequency signal P, and then, these a little parameter values that will have identical numerical value are divided into same group (step S804).Then, in the group with maximum parameter value numbers, the one of which of getting these a little parameter values with identical numerical value is as parameter reconfiguration R (step S806).
For instance, Fig. 9 is the synoptic diagram of a kind of data actuating signal and parameter value thereof.Please, at first, can produce 7 parameter values according to the square wave A1-square wave A7 of data actuating signal DE with reference to Fig. 9.Wherein the parameter value of square wave A1, square wave A2 and square wave A4 is all 2000, and the parameter value of square wave A3 and square wave A5 is 1500, and the parameter value of square wave A6 and square wave A7 then is 1800.Then, according to the big I of parameter value square wave A1-square wave A7 is divided into three groups, first group is made up of square wave A1, square wave A2 and square wave A4, and second group is made up of square wave A3 and square wave A5, and the 3rd group is made up of square wave A6 and square wave A7.Wherein first group has 3 identical parameter values (square wave A1, square wave A2 and square wave A4), and second group has 2 identical parameter values (square wave A3 and square wave A5), and the 3rd group then has 2 identical parameter values (square wave A6 and square wave A7).
Afterwards, can be by in the group with maximum identical parameter value numbers (first group just), the parameter value of getting any square wave is as parameter reconfiguration R.Though present embodiment decides parameter reconfiguration R according to the parameter value of square wave A1-square wave A7, in the practical application not as limit.When the more pulse wave signals of sampling decide parameter reconfiguration R, parameter reconfiguration R will so can produce more stable control signal S more near the cycle of data actuating signal DE.
In sum, the present invention can be when data actuating signal stops to change, and produces continual control signal according to cycle of data actuating signal, to use various actuation techniques.In addition, all embodiment of the present invention also have following effect:
1. when deciding parameter reconfiguration with more parameter values that produce continuously, parameter reconfiguration will so can produce more stable control signal more near the cycle of data actuating signal.
2. the user can be according to the more default value number of the required setting of practical situation, or sets when count value C accumulative total and export corresponding pulse wave signal during to different default value, can use the control signal of required actuation techniques with generation.
3. when deciding parameter reconfiguration with more parameter values, parameter reconfiguration will so can produce more stable control signal more near the cycle of data actuating signal.
Though the present invention with embodiment openly as above; Right its is not in order to limit the present invention; Has common knowledge the knowledgeable in the technical field under any; Do not breaking away from the spirit and scope of the present invention, when doing a little change and retouching, so protection scope of the present invention is as the criterion when looking above-mentioned the claim scope person of defining.
Claims (12)
1. the production method of a control signal comprises:
Utilize a data actuating signal and a frequency signal to produce a parameter reconfiguration; Wherein, in the cycle of this this data actuating signal of parameter reconfiguration indication, the step that produces this parameter reconfiguration comprises:
Utilize this data actuating signal and this frequency signal to produce one first parameter value;
Utilize this data actuating signal and this frequency signal to produce one second parameter value; And
When this first parameter value is identical with this second parameter value, get this second parameter value as this parameter reconfiguration;
Rising edge according to this parameter reconfiguration and this data actuating signal produces a count value; The step that produces this count value comprises:
Receive this data actuating signal, this frequency signal and this parameter reconfiguration, and the number of cycles of counting this frequency signal is to produce this count value;
When this count value reaches this parameter reconfiguration, this count value of resetting; And
When the rising edge appears in this data actuating signal, this count value of resetting;
And produce a control signal according to this count value.
2. the production method of a control signal comprises:
Utilize a data actuating signal and a frequency signal to produce a parameter reconfiguration; Wherein, in the cycle of this this data actuating signal of parameter reconfiguration indication, the step that produces this parameter reconfiguration comprises:
Utilize this data actuating signal and this frequency signal to produce multiple parameter values;
Those parameter values that will have identical numerical value are divided into same group; And
In the group with maximum parameter value numbers, the one of which of getting those parameter values with identical numerical value is as this parameter reconfiguration;
Rising edge according to this parameter reconfiguration and this data actuating signal produces a count value; The step that produces this count value comprises:
Receive this data actuating signal, this frequency signal and this parameter reconfiguration, and the number of cycles of counting this frequency signal is to produce this count value;
When this count value reaches this parameter reconfiguration, this count value of resetting; And
When the rising edge appears in this data actuating signal, this count value of resetting;
And produce a control signal according to this count value.
3. the production method of control signal as claimed in claim 1 is characterized in that, the step that produces this control signal according to this count value comprises:
When this count value reached a default value, this control signal transferred low level to by high levle.
4. the production method of control signal as claimed in claim 1 is characterized in that, the step that produces this control signal according to this count value comprises:
When this count value reached a default value, this control signal transferred high levle to by low level.
5. the production method of control signal as claimed in claim 1 is characterized in that, the step that produces this control signal according to this count value comprises:
When this count value reaches a default value, export a pulse wave signal.
6. the production method of control signal as claimed in claim 2 is characterized in that, the step that produces this control signal according to this count value comprises:
When this count value reached a default value, this control signal transferred low level to by high levle.
7. the production method of control signal as claimed in claim 2 is characterized in that, the step that produces this control signal according to this count value comprises:
When this count value reached a default value, this control signal transferred high levle to by low level.
8. the production method of control signal as claimed in claim 2 is characterized in that, the step that produces this control signal according to this count value comprises:
When this count value reaches a default value, export a pulse wave signal.
9. the generation device of a control signal is characterized in that, comprising:
One frequency signal generator is in order to produce a frequency signal;
One first counter couples this frequency signal generator; Utilize this first counter reception data actuating signal and this frequency signal to produce one first parameter value; Utilize this first counter this data actuating signal of reception and this frequency signal to produce one second parameter value; When this first parameter value is identical with this second parameter value, get this second parameter value as a parameter reconfiguration; Wherein this parameter reconfiguration is indicated the cycle of this data actuating signal;
One second counter couples this frequency signal generator; This second counter is in order to receiving this data actuating signal, this frequency signal and this parameter reconfiguration, and the number of cycles of counting this frequency signal is to produce a count value; When this count value reaches this parameter reconfiguration, this count value of resetting; And when the rising edge appears in this data actuating signal, this count value of resetting;
One buffer couples this first counter and this second counter, in order to store this parameter reconfiguration that this first counter is produced; And
One control signal generator couples this second counter, in order to produce a control signal according to this count value.
10. the generation device of control signal as claimed in claim 9 is characterized in that, this count value is the number of cycles of this frequency signal.
11. the generation device of a control signal is characterized in that, comprising:
One frequency signal generator is in order to produce a frequency signal;
One first counter couples this frequency signal generator; Utilize this first counter to produce multiple parameter values according to data actuating signal and this frequency signal; Those parameter values that will have identical numerical value are divided into same group; In the group with maximum parameter value numbers, the one of which of getting those parameter values with identical numerical value is as a parameter reconfiguration; Wherein this parameter reconfiguration is indicated the cycle of this data actuating signal;
One second counter couples this frequency signal generator; This second counter is in order to receiving this data actuating signal, this frequency signal and this parameter reconfiguration, and the number of cycles of counting this frequency signal is to produce a count value; When this count value reaches this parameter reconfiguration, this count value of resetting; And when the rising edge appears in this data actuating signal, this count value of resetting;
One buffer couples this first counter and this second counter, in order to store this parameter reconfiguration that this first counter is produced; And
One control signal generator couples this second counter, in order to produce a control signal according to this count value.
12. the generation device of control signal as claimed in claim 11 is characterized in that, this count value is the number of cycles of this frequency signal.
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| US6560302B1 (en) * | 1997-12-26 | 2003-05-06 | Samsung Electronics Co., Ltd. | Sync detection device for an optical disk player and method for detecting sync |
| CN1474401A (en) * | 2002-08-07 | 2004-02-11 | 联发科技股份有限公司 | Synchronous signal protective circuit |
| CN101131806A (en) * | 2006-08-24 | 2008-02-27 | 联咏科技股份有限公司 | Charge pump clock generating circuit and method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6560302B1 (en) * | 1997-12-26 | 2003-05-06 | Samsung Electronics Co., Ltd. | Sync detection device for an optical disk player and method for detecting sync |
| CN1474401A (en) * | 2002-08-07 | 2004-02-11 | 联发科技股份有限公司 | Synchronous signal protective circuit |
| CN101131806A (en) * | 2006-08-24 | 2008-02-27 | 联咏科技股份有限公司 | Charge pump clock generating circuit and method thereof |
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| JP特开平6-348252A 1994.12.22 |
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Granted publication date: 20120627 |