CN103731662B - A kind of display unit and method of pointing out VGA signal source state - Google Patents
A kind of display unit and method of pointing out VGA signal source state Download PDFInfo
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- CN103731662B CN103731662B CN201310618385.3A CN201310618385A CN103731662B CN 103731662 B CN103731662 B CN 103731662B CN 201310618385 A CN201310618385 A CN 201310618385A CN 103731662 B CN103731662 B CN 103731662B
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Abstract
The display unit that the invention provides a kind of VGA of prompting signal source state, comprises main control module, signal source front-end module and display module. Wherein, signal source front-end module, in the time that the input signal receiving does not comprise VGA input signal, arranges an invalidated identification value; Main control module is for reading described invalidated identification value and generating first instruction of prompting without VGA signal; Display module is for showing the information without VGA signal according to described the first instruction. The present invention program can correctly point out VGA signal source status information, solves prior art and can not point out the problem without VGA signal.
Description
Technical field
The present invention relates to display device technology field, relate in particular to a kind of VGA of prompting signal source stateDisplay unit and method.
Background technology
At present, along with the raising of people's living standard, various display unit are universal gradually, for example television set,The life that they are people provides various facilities, has also brought a lot of enjoyment.
VGA(VideoGraphicsArray) be a kind of video transmission standard, it have resolution ratio high,The advantages such as display speed is fast, color is abundant, are therefore widely used in various display unit.
In the actual use of display unit, VGA signal source equipment sends to aobvious by VGA input signalShowing device, display unit shows the VGA signal receiving. But receiving may appear in display unitThe VGA input signal situation that can not normally use, for example signal source resolution ratio is not supported, or VGASignal source equipment is closed etc. When similar situation occurs, and display unit does not provide corresponding prompting,Make user be unable to find out the reason that display unit can not normally show, thereby cannot find corresponding solution partyCase. Taking television set as example, in the time that television set cannot broadcast program, if television set does not provide accordingly and carriesShow, just cannot know the reason that it cannot be play, also just can not make respective handling, make its normal play.
In prior art, in the time that VGA signal source equipment is closed, or the VGA being connected with this deviceWhen cable is pulled out, display unit prompting " not supporting this resolution ratio ", and then user can produce doubt,Can not make correct processing.
Therefore, be necessary very much to provide one to point out user VGA signal source according to actual conditionsThe technical scheme of state.
Summary of the invention
In view of this, the invention provides a kind of prompting VGA(video transmission standard) dress of signal source statePut and method, can be applicable on television equipment, can point out user VGA signal according to actual conditionsThe state in source.
The invention provides a kind of display unit of the VGA of prompting signal source state, comprise main control module,Signal source front-end module and display module; Described signal source front-end module is under the control of main control moduleThe input signal unification of all types of signal sources is converted into standard row field sync signal for display module output,Wherein:
Described signal source front-end module, does not also comprise VGA input letter for the input signal receivingNumber time, an invalidated identification value is set;
Described main control module, also for reading described invalidated identification value and generating prompting without VGA signalThe first instruction;
Described display module, also for showing the information without VGA signal according to described the first instruction.
The present invention also provides a kind of display methods of the VGA of prompting signal source state, and described method comprisesFollowing steps:
In the time that the input signal receiving does not comprise VGA input signal, an invalidated identification value is set;
Read described invalidated identification value and produce the hint instructions without VGA signal;
Show the information without VGA signal according to described hint instructions.
From above technical scheme, in technical scheme provided by the present invention, when signal source front-end moduleWhen the input signal receiving does not comprise VAG input signal, an invalidated identification value is set, main control modulePass through I2Invalidated identification value in the front-end module of C bus read signal source also produces the prompting without VGA signalInstruction, display module shows the information without VGA signal according to this instruction; Therefore, the present invention canTo realize in the time there is no the input of VGA signal, correct prompting does not have the information of VGA signal input, can notThere is the error message of pointing out resolution ratio not support while input without VGA signal; And the present invention is without rightHardware makes any change, realizes cost very cheap.
Brief description of the drawings
Fig. 1 is a kind of embodiment device schematic diagram provided by the invention.
Fig. 2 is signal source front-end module structural representation in a kind of embodiment provided by the invention.
Fig. 3 is the typical embodiment flow chart of one provided by the invention.
Fig. 4 is a kind of preferred embodiment flow chart provided by the invention.
Detailed description of the invention
The present invention is because whether signal source front-end module comprises VGA input according to the input signal receivingSignal arranges ident value, and main control module passes through I again2C bus is obtained the mark in signal source front-end moduleValue sends hint instructions, and display module finally carrys out display reminding information according to this hint instructions. The present inventionCan accurately point out and have or not VGA input signal, effectively avoid in the time there is no VGA input signal mistakeThe problem of resolution ratio is not supported in mistake prompting. In order to further illustrate the present invention, provide the following example:
Embodiment mono-
Please refer to Fig. 1, the embodiment of the present invention provides a kind of display unit of the VGA of prompting signal source state100, this device 100 comprises main control module 110, signal source front-end module 120 and display module 130.
Signal source front-end module 120, in the time that the input signal receiving does not comprise VGA input signal, is establishedPut an invalidated identification value. Wherein, set invalidated identification value is saved, so that main control module 110Read.
Main control module 110 reads described invalidated identification value and generates first instruction of prompting without VGA signal.Above-mentioned main control module 110 is reading after invalidated identification value, can produce the first instruction according to this ident value, usesTo control display module 130.
Display module 130 shows the information without VGA signal according to described the first instruction. Show mouldPiece 130, receiving after the first instruction that main control module 110 sends, will show without VGA according to this instructionThe information of signal.
Because the display module 130 in the present invention can be according to main control module when without VGA input signal110 the first instructions that generate, show the information without VGA input signal, exist with respect to prior artWhile input without VGA signal, the information of still pointing out resolution ratio not support, information of the present invention is moreAccurately.
Embodiment bis-
Please refer to Fig. 1, the embodiment of the present invention provides a kind of display unit of the VGA of prompting signal source state100, this device 100 comprises main control module 110, signal source front-end module 120 and display module 130.
In a preferred embodiment, signal source front-end module 120 can be one and has dissimilarThe input signal unification of the signal source row field sync signal that is converted into standard carry out the chip of output function,Namely signal source front-end chip. Signal source front-end module 120 can receive dissimilar input signal,For example can receive high-definition multimedia signal, composite video broadcast singal etc.
In the present embodiment, the input signal receiving when signal source front-end module 120 does not comprise that VGA is defeatedWhile entering signal, an invalidated identification value is set; In the time that the input signal receiving comprises VGA input signal,One effective flag is set. Please refer to Fig. 2, in a preferred embodiment, signal source front-end module120 interiorly can arrange one first register 121, and invalidated identification value and effectively ident value are stored in first and depositIn device 121, so that main control module 110 reads.
In addition, signal source front-end module 120 can also comprise the second register 122, when VGA input letterNumber enter into after signal source front-end module 120, the second register 122 can be preserved the resolution ratio ginseng of these signalsNumber.
In a preferred embodiment, signal source front-end module 120 is signal source front-end chip ADV7850,And the inside of this chip is provided with a measurement module STDI; For example, this measurement module can compriseSTDI_DVALID_CH1_ST register, CH1_BL register, CH1_LCF register,CH1_LCVS register and CH1_FCL register etc. Wherein, STDI_DVALID_CH1_STStatus register i.e. the first register, CH1_BL, CH1_LCF, CH1_LCVS and CH1_FCLRegister i.e. the second register. The input signal receiving as signal source front-end chip ADV7850 does not wrapDuring containing VGA input signal, a nothing can be set in STDI_DVALID_CH1_ST registerEffect ident value, under normal circumstances, invalidated identification value can be set as 0; When signal source front-end chipWhen the input signal that ADV7850 receives comprises VGA input signal, can beOne effective ident value is set in STDI_DVALID_CH1_ST register, under normal circumstances, has criterionKnowledge value can be set to 1. And the position that resolution parameter is deposited is corresponding with these registers, that is to say, parameter block length can leave in CH1_BL register, and parameter field line number canLeave in CH1_LCF register, parameter vertical synchronization line number can leave in CH1_LCVS,Parameter number of fields length can leave in CH1_FCL register.
Because above-mentioned resolution parameter can accurate description goes out the proterties of input signal, and that resolution ratio refers to is aobviousShowing device can show how many pixels, therefore only has the resolution parameter of input signal to divide with display unitThe rate of distinguishing matches, and this display unit could show this input signal.
Understanding resolution parameter is proterties how to describe input signal, can first open from signal transmissionBegin to explain. As a rule, the input signal that display unit receives is generally image transmitting signal, and schemesSimilarly be to transmit frame by frame, a two field picture can be made up of two fields, i.e. odd field and even number. Accordingly, image, in the time scanning, by the line scanning of advancing, for example, is undertaken by odd-numbered lineWhat obtain is exactly odd field in scanning, and what scan by even number line is exactly even field. Understood frame,After the concept of field, row, just can clearly know, the proterties of input signal is to come by description of themDetermine, that is to say, resolution parameter is the associated description of frame to input signal, field, row. WithBlock length is example, and block length is one of resolution parameter, when after signal entering signal source front-end module 12,Signal source front-end module 12 can calculate the clock sum in the video being made up of the capable video of N, and instituteThe clock sum calculating is exactly block length. Wherein, N is can be self-defining, in preferred enforcementIn mode, can specify that 8 row videos are one, can certainly define 10 row videos and be one etc.,Do not do particular determination at this. The resolution parameter that similar block length is such, they can be from different perspectivesThe proterties of definition signal, therefore can distinguish this signal according to different resolution parameters which kind of is applicable toThe display unit of resolution ratio.
The block length of resolution parameter except saying before, also comprise a line number, vertical synchronization line number andNumber of fields length. In fact, the kind of resolution parameter is a lot, if detect one by one preservation, can wastePlenty of time and energy, and then reduce operating efficiency. Therefore, in a preferred embodiment, Ke YixuanGet block length, line number, vertical synchronization line number and these four of number of fields length and there is the parameter of characteristic featurePreserve, can determine whether this input signal can be shown by this display unit according to these parameters like this,Also do not reduce operating efficiency.
In sum, signal source front-end module 120 can comprise the first register 121, above-mentioned without criterionKnowledge value and effectively ident value are all to leave in the first register 121 of signal source front-end module; SignalSource front-end module 120 can also comprise the second register 122, and leaves in the first register 121Ident value and leave the resolution parameter in the second register in, reads for main control module 110.
In the present embodiment, what from the first register 121, read when main control module 110 is invalidated identification valueTime, can generate first instruction of prompting without VGA signal. When main control module 110 is from the first register 121In read be effective ident value time, main control module 110 will further read from the second register 122Resolution parameter. In a preferred embodiment, main control module 110 can be by obtaining extensivelyThe I of application2C bus reads invalidated identification value or effective ident value of storage in the first register 121.
That is to say, if main control module 110 reads is invalidated identification value, explanation receivesInput signal does not comprise VGA input signal, and now main control module 110 can produce one without VGA signalHint instructions. If what main control module 110 read is effective ident value, signal source front end mould is describedThe input signal that piece 120 receives comprises VGA input signal, and now main control module 110 needs judgementWhether this input signal closes with the resolution which matches of this display unit, so can further obtain this VGAThe resolution parameter of input signal.
Further, the main control module 110 in the present embodiment is reading dividing of above-mentioned VGA input signalDistinguish after rate parameter, can judge that read resolution parameter is whether within the scope of the resolution parameter that can play,Its deterministic process can be as follows:
First, determine the resolution parameter scope that this display unit can be play. In a preferred embodiment,The resolution parameter scope that display unit can be play, can set in advance in display unit.
Then, pre-set the resolution parameter scope of playing remain in a default table.
Finally, in the time that main control module 110 gets the resolution parameter of VGA input signal, according to thisDefault table judges the resolution parameter scope whether this resolution parameter can be play in display unit 100.If within the scope of the resolution parameter that resolution parameter can not be play in display unit 100, generate prompting notSupport the second instruction of resolution ratio; If the resolution parameter scope that resolution parameter can be play at display moduleIn, VGA input signal is gone to display module 130 and show.
The default table of above-mentioned basis judges the resolution whether this resolution parameter can be play in display unit 100The detailed process of rate parameter area, can illustrate by way of example. For example, there is now a VGA signalSource, obtains B parameter L, the LCF of this signal source, the value of LCVS, FCL is respectively x, y, and z, r,This parameter value and resolving range table (as shown in table 1) are contrasted, if x in scope a～b,Y in scope c～d, z in scope e～f, r in scope g～h, signal source front-end module 12The VGA signal that output is converted into the row field sync signal of standard shows to display module 13. If this letterNumber the miss resolving range of parameter value in any record, produce and do not support the of resolution ratioTwo instructions, display module 13 shows the information of not supporting resolution ratio according to hint instructions.
| Sequence number | B parameter L | Parameter L CF | Parameter L CVS | Parameter F CL |
| 1 | a～b | c～d | e～f | g～h |
| 2 | i～j | k～l | m～n | o～p |
| …… | …… | …… | …… | …… |
Table 1
In sum, the main control module 110 in the present embodiment, in the time reading invalidated identification value, produces theOne instruction; In the time reading effective ident value, further read-out resolution parameter, when read resolutionRate parameter, in the scope of default table, does not produce the second instruction.
130 instructions that produce according to main control module 110 of display module show. For example, showModule 130 is receiving after the first instruction, will show the information without VGA signal according to this instruction;Receiving after the second instruction, showing the information of not supporting resolution ratio.
In a preferred embodiment, display module 130 is receiving after the first instruction, shows " without VGASignal " prompt text, receiving after the second instruction, show the prompting of " not supporting this resolution ratio "Word. Information, except being suggestive word, can be also warning light, for example when red tableShow no signal, green light represents not support this resolution ratio; Can also be to use buzzer, for example, yowl and representNo signal, short ring represents not support this resolution ratio. Generally speaking, any vision that can point out user orPerson's auditory information, can be used as information.
In sum, the display unit of the prompting VGA signal source state that the embodiment of the present invention provides, energyThe VGA signal source state that enough correct prompting display unit receive, when without VGA input signal, aobviousShowing device will be pointed out the input signal without VGA; When there being the input of VGA input signal, and display unit is differentiatedWhen rate is not supported this input signal, the information of resolution ratio is not supported in display unit prompting.
Embodiment tri-
Please refer to Fig. 3, the present invention also provides a kind of method that is used for pointing out VAG signal source state, the partyMethod specifically comprises:
Step 101, in the time that the input signal receiving does not comprise VGA input signal, arranges one without criterionKnowledge value. This invalidated identification value is in order to produce the hint instructions without VGA signal.
Step 102, reads described invalidated identification value and produces the first instruction without VGA signal. Institute producesHint instructions be according in step 101 arrange invalidated identification value obtain, can be for generation of nothingThe information of VGA signal.
Step 103, shows the information without VGA signal according to described hint instructions. According to without VGAThe hint instructions of signal shows the information without VGA signal corresponding with this instruction.
Present embodiment produces prompting by invalidated identification value set in the front-end module of read signal source and refers toOrder, to show the information without VGA signal according to this instruction, can be in the time inputting without VGA signal,Correctly point out to user.
Embodiment tetra-
The embodiment of the present invention provides a kind of method that is used for pointing out VAG signal source state, the optimum of the methodImplementation concrete steps as shown in Figure 4.
Step 201, newly comprises the input signal of VGA according to the input receiving, be provided with effect ident valueOr invalidated identification value, and preserve the resolution parameter of VGA input signal.
Here it should be noted that, due to except VGA signal, to also have other dissimilar defeatedEnter signal, such as high-definition multimedia signal, composite video broadcast singal etc., so provided by the present inventionMethod can be carried out in a specific duty, and for example, main control module can be first to signal source front endModule sends instruction, and signal source front-end module receives after this instruction, enters and receives VGA input signalDuty, then signal source front-end module starts constantly to detect VGA input signal, namely holdsRow step 201, if but signal source front-end module does not receive the instruction that main control module sends, and it isCan initiatively not remove to detect VGA input signal.
In the time that the input signal receiving does not comprise VGA input signal, an invalidated identification value is set; WhenWhen the input signal receiving comprises VGA input signal, an effective ident value is set.
In a preferred embodiment, above-mentioned invalidated identification value and effective ident value are kept at signal source front endIn chip ADV7850, the inside of this chip is provided with a measurement module STDI, this measurement module bagDraw together STDI_DVALID_CH1_ST, CH1_BL, CH1_LCF, CH1_LCVS and CH1_FCLRegister. The input signal receiving as signal source front-end chip ADV7850 does not comprise VGA input letterNumber time, an invalidated identification value, normal conditions are set in STDI_DVALID_CH1_ST registerUnder, invalidated identification value is set to 0; The input signal receiving as signal source front-end chip ADV7850While comprising VGA input signal, in STDI_DVALID_CH1_ST register, arrange one effectiveIdent value, under normal circumstances, effectively ident value is set to 1. And, the position that resolution parameter is depositedPut correspondingly with these registers, that is to say, parameter block length leaves CH1_BL register inIn, parameter field line number leaves in CH1_LCF register, and parameter vertical synchronization line number leaves inIn CH1_LCVS, parameter number of fields length leaves in CH1_FCL register.
Above-mentioned resolution parameter can accurate description goes out the proterties of input signal, and resolution ratio refers to and shows dressPut and can show how many pixels, only have input signal resolution parameter can with display unit resolution which matchesClose, this display unit could show this input signal.
Understanding resolution parameter is proterties how to describe input signal, first starts to separate from signal transmissionRelease. As a rule, the input signal that display unit receives is generally image transmitting signal, and image isTransmit frame by frame, a two field picture is made up of two fields, i.e. odd field and even field. BecauseImage is in the time scanning, and by the line scanning of advancing, scanning what obtain by odd-numbered line is exactly odd number, and what scan by even number line is exactly even field. Understanding after the concept of frame, field, row, justCan clearly know, the proterties of input signal is determined by description of them, that is to say,Resolution parameter is the associated description of frame to input signal, field, row. Taking block length as example, block lengthOne of resolution parameter, when after signal entering signal source front-end module 12, signal source front-end module 12Can calculate the clock sum in the video being formed by the capable video of N, and the clock sum calculatingIt is exactly block length. Wherein, N is can be self-defining, and in a preferred embodiment, regulation 8 row are lookedFrequently be one, can certainly define 10 row videos is one. The resolution parameter that similar block length is such,They are the proterties of definition signal from different perspectives, therefore can come according to different resolution parametersDistinguish the display unit which kind of resolution ratio this signal is applicable to.
The block length of resolution parameter except saying before, also comprise a line number, vertical synchronization line number andNumber of fields length. In fact, the kind of resolution parameter is a lot, if detect one by one preservation, can wastePlenty of time and energy, and then reduce operating efficiency. Therefore, in a preferred embodiment, choose pieceLength, a line number, vertical synchronization line number and these four parameters with characteristic feature of number of fields length are carried outPreserve. Can determine whether this input signal can be shown by this display unit according to these parameters like this, alsoDo not reduce operating efficiency.
Step 202, what judgement read is effective ident value or invalidated identification value, if effectively identifyValue, goes to step 203; If invalidated identification value, goes to step 205.
In a preferred embodiment, what read is invalidated identification value, the input letter that explanation receivesNumber do not comprise VGA input signal, now can produce a hint instructions without VGA signal. If readTo be effective ident value, the input signal that receives of explanation comprises VGA input signal, now needsThis judges whether this input signal closes with the resolution which matches of this display unit, so can further be obtainedThe resolution parameter of VGA input signal.
Step 203, according to the effective ident value reading, further read-out resolution parameter, judges instituteWhether the resolution parameter reading is within the scope of the resolution parameter that can play, and if so, output is converted intoThe VGA signal of the row field sync signal of standard shows; If not, produce and do not support resolution ratioThe second instruction.
Reading after the resolution parameter of above-mentioned VGA input signal the resolution parameter that judgement is readWithin the scope of the resolution parameter that can play, its deterministic process can be as follows.
First, determine the resolution parameter scope that this display unit can be play. In a preferred embodiment,The resolution parameter scope that display unit can be play, can set in advance in display unit.
Then, pre-set the resolution parameter scope of playing remain in a default table.
Finally, in the time getting the resolution parameter of VGA input signal, judge according to this default tableThe resolution parameter scope whether this resolution parameter can play.
The default table of above-mentioned basis judges that this resolution parameter is whether in the resolution parameter scope that can playDetailed process, can illustrate by way of example. For example, there is now a VGA signal source, obtain this letterB parameter L, the LCF in number source, the value of LCVS, FCL are respectively x, y, z, r, by this parameter value withResolving range table (as shown in table 1) contrasts, if x in scope a～b, y is at scope c～dIn, z is in scope e～f, and r is in scope g～h, and 12 outputs of signal source front-end module are converted into markThe VGA signal of accurate row field sync signal shows to display module 13. If the parameter value of this signal is notHit any record in resolving range, produce the second instruction of not supporting resolution ratio, showModule 13 shows the information of not supporting resolution ratio according to hint instructions.
In sum, in the time reading invalidated identification value, produce the first instruction; Reading effective markWhen value, further read-out resolution parameter, when read resolution parameter is not in the scope of default table,Produce the second instruction.
Step 204, in the time receiving the second instruction, shows the information of not supporting resolution ratio.
Step 205, according to the invalidated identification value reading, generates the first instruction without VGA signal.
Step 206, shows the information without VGA signal according to the first instruction.
In a preferred embodiment, receiving after the first instruction, can show " without VGA signal "Prompt text, receiving after the second instruction, can show the prompting literary composition of " not supporting this resolution ratio "Word. Information, except being suggestive word, can be also warning light, and for example when red representsNo signal, green light represents not support this resolution ratio; Can also be use buzzer, for example yowl indicate withoutSignal, short ring represents not support this resolution ratio. Generally speaking, any vision that can point out user orAuditory information, can be used as information.
In sum, the display methods of the prompting VGA signal source state that the embodiment of the present invention provides, energyThe VGA signal source state that enough correct prompting display unit receive, when without VGA input signal, aobviousShowing device will be pointed out the input signal without VGA; When there being the input of VGA input signal, and display unit is differentiatedWhen rate is not supported this input signal, the information of resolution ratio is not supported in display unit prompting.
The present invention can have in the time inputting without VGA signal, and user is without VGA signal in prompting, defeated at VGAWhen entering signal rate not supported respectively, prompting user, this VGA input signal resolution ratio do not support, canEffectively avoid in prior art, the inaccurate problem of information, makes user according to suggested information,Make correct processing.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all at thisWithin the spirit and principle of invention, any amendment of making, be equal to replacement, improvement etc., all should be included inWithin the scope of protection of the invention.
Claims (10)
1. a display unit for VGA signal source state be can point out, main control module, signal source front end comprisedModule and display module; Described signal source front-end module is used under the control of main control module all types of lettersThe input signal unification in number source is converted into standard row field sync signal for display module output, it is characterized in that:
Described signal source front-end module, does not also comprise VGA input letter for the input signal receivingNumber time, an invalidated identification value is set, in the time that the input signal receiving comprises VGA input signal, establishPut an effective ident value;
Described main control module, also sets in advance for the resolution parameter scope that display unit can be playIn described display unit; In the time reading described invalidated identification value, generate prompting without the of VGA signalOne instruction; When read be described effective ident value time, read the resolution parameter of VGA input signal,Judge the resolution parameter scope whether described resolution parameter can be play in described display unit;
Described display module, also in the time generating the first instruction, shows nothing according to described the first instructionThe information of VGA signal; When read be described effective ident value time, if determine resolution parameter notWithin the scope of the resolution parameter that can play in described display unit, generate prompting and do not support the of resolution ratioTwo instructions, show according to described the second instruction the information of not supporting resolution ratio; Described information isSuggestive word or warning light.
2. device as claimed in claim 1, is characterized in that, establishing in described signal source front-end moduleBe equipped with the first register, described invalidated identification value is stored in described the first register;
Described main control module passes through I2C bus reads the invalidated identification value of storing in described the first register.
3. device as claimed in claim 2, is characterized in that, described signal source front-end module is receivingTo input signal while comprising VGA input signal, an effective ident value is set, and stores described VGAThe resolution parameter of input signal.
4. device as claimed in claim 3, is characterized in that, described main control module obtains described VGAThe resolution parameter of input signal, if the resolution ratio that described resolution parameter can be play in described display unitIn parameter area, the standard that described signal source front-end module output is transformed by described VGA input signalRow field sync signal shows to described display module.
5. device as claimed in claim 3, is characterized in that, the resolution ratio of described VGA input signalParameter comprises: block length, a line number, vertical synchronization line number and number of fields length;
In described signal source front-end module, be also provided with the second register;
Described effective ident value is stored in described the first register; The resolution ratio of described VGA input signalParameter storage is in described the second register;
Described main control module passes through I2C bus reads described second in described signal source front-end module and depositsThe resolution parameter of the described VGA input signal in device.
6. the display methods that can point out VGA signal source state, is characterized in that, described method comprisesFollowing steps:
In the time that the input signal receiving does not comprise VGA input signal, an invalidated identification value is set, whenWhen the input signal receiving comprises VGA input signal, an effective ident value is set;
The resolution parameter scope that display unit can be play sets in advance in described display unit;
In the time reading described invalidated identification value, produce first instruction of prompting without VGA signal;
When read be described effective ident value time, read the resolution parameter of described VGA input signal,Judge the resolution parameter scope whether described resolution parameter can be play in described display unit;
In the time generating the first instruction, show the information without VGA signal according to described the first instruction;When read be described effective ident value time, if determine resolution parameter can not play in described display unitResolution parameter within the scope of, generate prompting and do not support the second instruction of resolution ratio, according to described secondInstruction shows the information of not supporting resolution ratio; Described information is suggestive word or warning light.
7. method as claimed in claim 6, is characterized in that, described method also comprises:
In the time that the input signal receiving comprises VGA input signal, an effective ident value is set, and depositsStore up the resolution parameter of described VGA input signal.
8. method as claimed in claim 7, is characterized in that, described in read described VGA input signalResolution parameter, judge the resolution ratio ginseng whether described resolution parameter can play in described display unitAfter number scope, also comprise:
If within the scope of the resolution parameter that described resolution parameter can be play in described display unit, outputThe standard row field sync signal being transformed by described VGA input signal shows.
9. method as claimed in claim 8, is characterized in that, the resolution ratio of described VGA input signalParameter comprises: block length, a line number, vertical synchronization line number and number of fields length.
10. method as claimed in claim 8, is characterized in that, the resolution of described VGA input signalRate parameter comprises: block length, a line number, vertical synchronization line number and number of fields length;
Described effective ident value is stored in the first register in described signal source front-end module; Described VGAThe resolution parameter of input signal is stored in the second register of described signal source front-end module.
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| CN101583048A (en) * | 2009-06-12 | 2009-11-18 | 深圳创维－Rgb电子有限公司 | Signal detection device of VGA channel |
| CN101742136A (en) * | 2008-11-18 | 2010-06-16 | 中兴通讯股份有限公司 | Multimedia terminal-based adaptive display method |
| CN102111662A (en) * | 2009-12-25 | 2011-06-29 | 康佳集团股份有限公司 | Method for displaying television signal status and set top box (STB) |
| CN103297847A (en) * | 2013-04-28 | 2013-09-11 | 四川长虹电器股份有限公司 | Method for achieving signal source intelligent navigation and switching |
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2013
- 2013-11-27 CN CN201310618385.3A patent/CN103731662B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5734423A (en) * | 1996-01-23 | 1998-03-31 | Mitsubishi Denki Kabushiki Kaisha | Signal hybrid device |
| CN101212587A (en) * | 2006-12-30 | 2008-07-02 | 乐金电子(中国)研究开发中心有限公司 | Digital TV receiver and method adaptive to display parameters of display terminal |
| CN101742136A (en) * | 2008-11-18 | 2010-06-16 | 中兴通讯股份有限公司 | Multimedia terminal-based adaptive display method |
| CN101583048A (en) * | 2009-06-12 | 2009-11-18 | 深圳创维－Rgb电子有限公司 | Signal detection device of VGA channel |
| CN102111662A (en) * | 2009-12-25 | 2011-06-29 | 康佳集团股份有限公司 | Method for displaying television signal status and set top box (STB) |
| CN103297847A (en) * | 2013-04-28 | 2013-09-11 | 四川长虹电器股份有限公司 | Method for achieving signal source intelligent navigation and switching |
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