Summary of the invention
The object of the present invention is to provide a kind of can be to some because skew appears in the display image that the quality problems of signal source cause or deficient phenomena is proofreaied and correct, and can avoid the loaded down with trivial details method and the corresponding device thereof of user's manual correction.
In order to address the above problem, the present invention proposes a kind of shows signal method for correcting phase, may further comprise the steps:
A, reception shows signal parameter to be corrected comprise that at least synchronous width parameter, synchronous back are along width parameter and synchronous polarity parameter;
B, judge that whether the synchronous polarity parameter of this signal to be corrected is coupling polarity; If not then the synchronous width parameter of described shows signal to be corrected is set to synchronous back along width parameter with synchronous back along the width parameter sum;
Synchronous back after c, the described correction is set to the actual displayed parameter along width parameter as correction parameter;
Wherein, described coupling polarity is meant: when display device regulation rising edge triggered reference position identification, coupling polarity was negative polarity; When display device regulation negative edge triggered reference position identification, coupling polarity was positive polarity.
Further, between described step b and step c, perhaps after the step c, also comprise steps d: store the shows signal parameter and the correction parameter thereof that receive among the described step a.
Further again, between described step a and step b, also include following steps:
A1, if the synchronous polarity parameter of described signal to be corrected is a coupling polarity, then finish the correction process, and described shows signal parameter to be corrected is set to the actual displayed parameter;
A2, according to the comparison of the corresponding parameter of the shows signal to be corrected that receives among the shows signal parameter of storing in the described steps d and the step a, judge described shows signal to be corrected whether with the shows signal of previous storage from same signal source, if, then directly the correction parameter of the previous shows signal of described storage is set to the actual displayed parameter, if not, execution in step b then.
Further again, when the record number of the shows signal parameter of described storage and correction parameter thereof reaches predetermined value, then cover previous shows signal parameter and correction parameter thereof with new shows signal parameter and correction parameter thereof.
Preferably, described shows signal is the VGA signal.
Correspondingly, the present invention also provides a kind of shows signal phase correction unit, comprising:
Receiving element is used to receive shows signal parameter to be corrected;
Comparing unit is used to judge whether the synchronous polarity parameter of described signal to be corrected is coupling polarity, if then finish the correction process; Otherwise, enter processing unit;
Processing unit, when described synchronous polarity is not the coupling polarity chron, the synchronous width parameter that is used for described shows signal to be corrected and back synchronously are set to synchronously the back along width parameter along the width parameter sum;
Output unit is used for the synchronous back after the correction of described processing unit output along width parameter as correction parameter and be set to the actual displayed parameter;
Wherein, described coupling polarity is meant: when display device regulation rising edge triggered reference position identification, coupling polarity was negative polarity; When display device regulation negative edge triggered reference position identification, coupling polarity was positive polarity.
Further, described shows signal phase correction unit also comprises:
Storage unit is used for storing shows signal parameter and the correction parameter thereof that receiving element receives;
Recognition unit, be used for comparison according to shows signal parameter with the corresponding parameter of the shows signal to be corrected of receiving element reception of described cell stores, judge that whether described shows signal to be corrected is same signal source with previous shows signal, if then directly the correction parameter of the described previous shows signal of cell stores is set to the actual displayed parameter; If not, then export described comparing unit to.
A nearlyer step, the shows signal parameter to be corrected that described receiving element receives comprises that at least synchronous width parameter, synchronous back are along width parameter and synchronous polarity parameter.
Preferably, described shows signal is the VGA signal.
Adopt the present invention can realize that to because the skew of the image display position that some difference of the signal that signal source produces and standard signal causes or the correction of deficient phenomena, the while can be avoided the loaded down with trivial details of user's manual adjustment.
Embodiment
With reference to figure 1, illustrate the functional structure of an embodiment of a kind of shows signal phase correction unit of the present invention.As shown in the figure, shows signal phase correction unit 1 comprises:
Receiving element 11 is used to receive shows signal parameter to be corrected; Wherein, the vision signal that described shows signal parameter to be corrected can be VGA signal or other appropriate formats, described shows signal be from signal source, for example DVD player, PC etc.; In addition, described shows signal parameter to be corrected comprises that at least synchronous width parameter, synchronous back are along width parameter, synchronous polarity parameter, can also comprise effective width parameter, overall width parameter and forward position parameter etc. synchronously, these parameters can be the correlation parameter of capable signal of described shows signal to be corrected or the correlation parameter of field signal.
Comparing unit 12 is used to judge whether the synchronous polarity parameter of described signal to be corrected is coupling polarity, if, then finishing the correction process, described shows signal parameter to be corrected is set to the actual displayed parameter; If not, then enter processing unit 13.Wherein, described coupling polarity is meant that when display device regulation rising edge triggered reference position identification, described coupling polarity parameter was a negative polarity; Discern when display device regulation negative edge triggers reference position, this moment, described coupling polarity was positive polarity.
Processing unit 13, judging described synchronous polarity when comparing unit 12 is not the coupling polarity chron, is used for the synchronous width parameter of described shows signal to be corrected and back synchronously and is set to synchronously the back along width parameter along the width parameter sum; Here both can cover original synchronous back along width parameter along width parameter with the synchronous back after proofreading and correct, also can be stored in the buffer memory of this device 1 separately or register medium described buffer memory or register are not described here owing to be common practice.
Output unit 14 is used for described correction back and is set to the actual displayed parameter along width parameter as correction parameter in the back synchronously.Wherein, in described actual displayed parameter, also comprise in the shows signal parameter to be corrected that is received in the described receiving element 11 except that synchronous back parameter remaining along width parameter.
To export in the video display process chip of display device by the actual displayed parameter that described phase correction unit 1 produces, and then the control display device carries out the image demonstration according to the parameter after proofreading and correct.
With reference to figure 2, illustrate the functional structure of another embodiment of a kind of shows signal phase correction unit of the present invention.As shown in the figure, shows signal phase correction unit 2 comprises:
Receiving element 21 is used to receive shows signal parameter to be corrected; Wherein, the vision signal that described shows signal parameter to be corrected can be VGA signal or other appropriate formats, described shows signal be from signal source, for example DVD player, PC etc.; In addition, described shows signal parameter to be corrected comprises that at least synchronous width parameter, synchronous back are along width parameter, synchronous polarity parameter, can also comprise effective width parameter, overall width parameter and forward position parameter etc. synchronously, these parameters can be the correlation parameter of capable signal of described shows signal to be corrected or the correlation parameter of field signal.
Recognition unit 22, be used for contrasting and judge that whether described shows signal to be corrected is same signal source with previous shows signal according to the shows signal parameter of following storage unit 25 storages and the corresponding parameter of the shows signal parameter described to be corrected of receiving element 21 receptions, if then directly the correction parameter of the described shows signal to be corrected of storage unit 25 storages is set to the actual displayed parameter; If not, then handle by following comparing unit 23.Wherein, described collation process can be in the shows signal parameter of more described at least respectively shows signal parameter to be corrected and storage unit 25 storages synchronous polarity parameter, synchronously width parameter, effective width parameter, the back is along width parameter, front porch width parameter and overall width parameter etc. synchronously synchronously.The described method that the actual displayed parameter is set can be the process by the video display process chip that described correction parameter is exported to display device.
Comparing unit 23 is used to judge whether the synchronous polarity parameter of the signal to be corrected that receiving element 21 receives is coupling polarity, if, then finishing the correction process, described shows signal parameter to be corrected is set to the actual displayed parameter; If not, then enter processing unit 24.Wherein, described coupling polarity is meant: when display device regulation rising edge triggered reference position identification, this moment, described coupling polarity parameter was a negative polarity; Discern when display device regulation negative edge triggers reference position, this moment, described coupling polarity was positive polarity.
Processing unit 24, judging described synchronous polarity when comparing unit 23 is not the coupling polarity chron, is used for the synchronous width parameter of described shows signal to be corrected and back synchronously and is set to synchronously the back along width parameter along the width parameter sum.Here both can cover original synchronous back along width parameter along width parameter, also can be stored in the buffer memory of this device 2 separately or in the register, the present invention does not specifically limit this with the synchronous back after proofreading and correct.
Storage unit 25 is used for storing the parameter and the correction parameter thereof of the shows signal that receiving element 21 received; Described correction parameter is amended described synchronous back along width parameter, and this correction parameter can also comprise in the shows signal parameter described to be corrected that is received in the described receiving element 21 except that synchronous back parameter remaining along width parameter.In addition, here storage mode adopts the mode with described shows signal parameter and its correction parameter corresponding stored, corresponding stored herein can be to store in the mode of the different field of same record, can certainly adopt other anyly can make any storage mode of the unique corresponding one group of correction parameter of described shows signal parameter and do not influence enforcement of the present invention, its purpose is to make things convenient for the reading of correction parameter of the shows signal after 22 pairs of recognition units are discerned successfully.
In addition, when storage unit 25 storage data reach predetermined value, then cover previous shows signal parameter and correction parameter thereof with new shows signal parameter and correction parameter thereof.Described previous shows signal parameter that need to cover and correction parameter thereof can be after according to time sequence the earliest or the display parameter and the correction parameter thereof of storage early.Certainly, described previous shows signal parameter and the correction parameter thereof that need to cover also can be to judge according to frequency of utilization, promptly uses minimum or less previous shows signal parameter of frequency and correction parameter thereof to be to need to cover; Here can be to access times field of recording setting of each previous shows signal parameter and correction parameter thereof, the access times of this record that adds up judge with convenient whether this record is the described record that needs covering.Wherein, described predetermined value can be the maximal value of memory capacity, also can be a predefined dominant record numerical value, and this value can be stored in this storage unit 25, just the record number that will store when at every turn increasing new stored record and this value compare, to judge whether to reach maximal value.
Need to prove that described record is meant the one group of shows signal parameter and the correction parameter thereof of storage.
Output unit 26, be used for described correction back synchronously the back along width parameter as correction parameter and be set to the actual displayed parameter.Wherein, described correction parameter can also comprise in the shows signal parameter described to be corrected that is received in the described receiving element 21 that correction parameter at this moment is the actual displayed parameter except that synchronous back remaining parameter along width parameter.The described method that is set to the actual displayed parameter can be the step by the video display process chip that described correction parameter is exported to display device.
With reference to figure 3, illustrate the workflow of an embodiment of the shows signal method for correcting phase that is proposed based on Fig. 1 means for correcting 1.As shown in the figure, may further comprise the steps:
Step 31 receives shows signal parameter to be corrected.Wherein, the vision signal that described shows signal parameter to be corrected can be VGA signal or other appropriate formats, described shows signal be from signal source, for example DVD player, PC etc.; In addition, described shows signal parameter to be corrected comprises that at least synchronous width parameter, synchronous back are along width parameter, synchronous polarity parameter, can also comprise effective width parameter, overall width parameter and forward position parameter etc. synchronously, these parameters can be the correlation parameter of capable signal of described shows signal to be corrected or the correlation parameter of field signal;
Step 32, whether the synchronous polarity parameter of the shows signal to be corrected that is received in the determining step 31 is coupling polarity, if then execution in step 35, otherwise, execution in step 33; Described coupling polarity is meant: when display device regulation rising edge triggered reference position identification, this moment, described coupling polarity parameter was a negative polarity; Discern when display device regulation negative edge triggers reference position, this moment, described coupling polarity was positive polarity;
Step 33, the back is set to synchronous back along width parameter along width parameter and synchronous width parameter sum synchronously; Here both can cover original synchronous back along width parameter along width parameter, also can be stored in separately in the buffer memory of this device 2 or in the register with the synchronous back after proofreading and correct;
Synchronous back after proofreading and correct in the step 34, step 33 is along being set to the actual displayed parameter except that synchronous back remaining parameter along width parameter in the shows signal parameter that receives in width parameter and the step 31.Setting up procedure mainly by parameter after the described correction and remaining parameter are sent in the video display process chip, shows control by video display process chip herein.
Step 35 finishes the correction process.
With reference to figure 4, illustrate the workflow of another embodiment of the shows signal method for correcting phase that is proposed based on Fig. 2 means for correcting 2.As shown in the figure, may further comprise the steps:
Step 41 receives shows signal parameter to be corrected.Wherein, the vision signal that described shows signal parameter to be corrected can be VGA signal or other appropriate formats, described shows signal be from signal source, for example DVD player, PC etc.; In addition, described shows signal parameter to be corrected comprises that at least synchronous width parameter, synchronous back are along width parameter, synchronous polarity parameter, can also comprise effective width parameter, overall width parameter and forward position parameter etc. synchronously, these parameters can be the correlation parameter of capable signal of described shows signal to be corrected or the correlation parameter of field signal.
Whether step 42, determining step 41 shows signal that receives from same signal source, if then execution in step 43, otherwise, execution in step 45.Here, judge whether from the contrast of same signal source to as if the parameter of previous previous shows signal of being preserved when carrying out the shows signal phase correction, this parameter is stored in the storage unit 25 in the means for correcting 2; The shows signal parameter of described storage promptly is the shows signal parameter that is received in the previous step 41; Described determination methods can only be whether the shows signal parameter of judging in this step 21 to be received all equates with the value of the corresponding parameter of the previous shows signal parameter of storage, if equate, then think from same signal source, otherwise, think from different signal sources.Certainly, judging whether here is that the method for same signal source is not unique, for example can also be whether the shows signal parameter judging in this step 21 to be received is all approximate with the value of the corresponding parameter of the previous shows signal parameter of storage, approximate herein this sub-value that is meant described corresponding parameter and toward sub-value whether all in same scope, if then think to be similar to, and then think from same signal source, otherwise cannot not think approximately, and then think and be not from same signal source.For example, be example with the field sync signal width, if the value of this parameter of this reception is 3.813 microseconds, previous this parameter value of storage is 3.751 microseconds, supposes that default scope is the 3.7-3.9 microsecond, then thinks to be similar this moment.Thus, we can adopt equal fully or approximate or the mode of both combinations judges whether from same signal source, and for example, the value of a part of corresponding parameter equates, and the respective value of the parameter of remaining part is close, then thinks it also is from same signal source.Because those skilled in the art can simply draw its detailed process by the foregoing description reasoning, therefore no longer describe in detail.In addition, said here preset value can be stored in the ROM (read-only memory), just can read this value after powering up at every turn; Described preset value also can be stored in the electricity erasable memorizer, can read after powering up, and also can change this preset value by specific function in operational process.Because this all is those skilled in the art's conventional techniques, therefore no longer more specifically describe.
Step 43 is called the described step 42 of having stored and is judged the shows signal to be corrected that receives with step 41 correction parameter from the shows signal of same signal source.This correction parameter is by being stored in the following step 48, and the invoked procedure here can be the correction parameter that simply reads by step 48 storage.Particular content for this correction parameter can refer step 48 be described.
Step 44, the correction parameter that obtains in the described step 43 are set to the actual displayed parameter of display device, finish the correction process then, promptly jump to step 49.This setting up procedure is, described correction parameter exported in the video display process chip of this display device, the display effect of display device controlled after reading described correction parameter by this chip.
Whether the synchronous polarity parameter that step 45, determining step 41 receive shows signal to be corrected is coupling polarity, if then execution in step 49, otherwise, execution in step 46.Description for coupling polarity can be described with reference to step 32 in embodiment illustrated in fig. 3.
Step 46, the back is set to synchronous back along width parameter along width parameter and synchronous width parameter sum synchronously.Here both can cover original synchronous back along width parameter along width parameter with the synchronous back after proofreading and correct, also can be stored in the buffer memory of this device 2 separately or register medium.
Synchronous back after proofreading and correct in the step 47, step 46 is along being set to the actual displayed parameter except that synchronous back remaining parameter along width parameter in the shows signal parameter to be corrected that receives in width parameter and the step 41.Setting up procedure mainly by the parameter of the synchronous back after the described correction along width parameter and former remainder is sent in the video display process chip, shows control by video display process chip herein.
Step 48 is stored the shows signal parameter to be corrected that is received in the described step 41, and the correction parameter of the described shows signal parameter to be corrected of corresponding stored.This correction parameter is amended described synchronous back along width parameter, in the shows signal parameter described to be corrected that this correction parameter can also comprise in the step 41 being received except that the parameter of synchronous back remainder along width parameter.
It should be noted that, in this step with described shows signal parameter to be corrected and correction parameter corresponding stored thereof, its purpose is when the shows signal parameter to be corrected that reads described storage in the step 42 after at this moment step 43 when judging from same signal source, then can directly call corresponding correction parameter.In order to reach this purpose, storage mode herein can be to store in the mode of the different field of same record, can certainly adopt other anyly can make any storage mode of the unique corresponding one group of correction parameter of described shows signal parameter to be corrected and do not influence enforcement of the present invention.
In addition, when the storage data reach predetermined value, then cover previous shows signal parameter and correction parameter thereof with new shows signal parameter and correction parameter thereof.Described previous shows signal parameter that need to cover and correction parameter thereof can be after according to time sequence the earliest or the display parameter and the correction parameter thereof of storage early.Certainly, described previous shows signal parameter and the correction parameter thereof that need to cover also can be to judge according to frequency of utilization, promptly uses minimum or less previous shows signal parameter of frequency and correction parameter thereof to be to need to cover; Here can be to access times field of recording setting of each previous shows signal parameter and correction parameter thereof, the access times of this record that adds up judge with convenient whether this record is the described record that needs covering.
Wherein, described predetermined value can be the maximal value of memory capacity, it also can be a predefined dominant record numerical value, this value can be stored in this storage unit 25 of means for correcting 2, just the record number that will store when at every turn increasing new stored record and this value compare, to judge whether to reach this maximal value.
Need to prove that described record is meant the one group of display parameter and the correction parameter thereof of storage.
Step 49 finishes this correction process.
What need further specify is that display device described in the present invention can be televisor or other any appropriate display device.
The above is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.