CN100449452C - Method for inspecting computer signalling source automatically - Google Patents
Method for inspecting computer signalling source automatically Download PDFInfo
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- CN100449452C CN100449452C CNB2005100669666A CN200510066966A CN100449452C CN 100449452 C CN100449452 C CN 100449452C CN B2005100669666 A CNB2005100669666 A CN B2005100669666A CN 200510066966 A CN200510066966 A CN 200510066966A CN 100449452 C CN100449452 C CN 100449452C
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- projector equipment
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Abstract
The present invention discloses a method for inspecting a computer signal source automatically in projector equipment, which comprises a pin position for checking a computer connector. When the voltage of the pin position is zero, a signal source of a computer is ensured to connect to the signal source, and if no other signal input projector equipment exists, a signal for receiving a computer signal source is automatically switched by the projector equipment.
Description
Technical field
The invention relates to a kind of method of automatic detection computer signalling source, in particular to a kind of method that in projector equipment, detects computer signalling source automatically.
Background technology
Projector equipment has become indispensable bulletin equipment in the modern business meeting, and usually, the bulletin personnel can utilize notebook computer to be connected to projector equipment, for example liquid crystal projector.The D-Sub connector is the common interface of general computer VGA, and the D-Sub interface adopts 15 pin positions (15pin) of asymmetric distribution to connect.Its principle of work is to modify tone into high-frequency signal with the signal of video signal of stored in digital format through analogy, and then is output into picture.The signal of notebook computer will be sent to projector equipment, generally is exactly to utilize computer connector (D-Sub connector) transmission video image.
General projector equipment normally detects when automatic detection signal sequentially.For the signal of arbitrary disappearance, must search in regular turn after other all signals, just can again be detected.If when searching at a certain signal specific, it is comparatively time-consuming that this kind seek mode then can seem.
Please refer to the order of Fig. 1 traditional detection signal, S0, S1 in graphic ... Sn represents different signals respectively, behind a certain blackout, normally can detect next signal sequentially.For example, during blackout in the projector equipment, for example during the S1 blackout of square 102, projector equipment will be searched S0 signal (for example pcs signal), just must search in order, just will search other all signals (S1 is to the Sn signal) afterwards, just can detect desired S0 signal (square 101), this moment just can be by projector equipment received signal and shows signal content (square 121).Again, after if S0 signal this moment (for example pcs signal) disappears, owing to detect less than the S0 signal, the direction that projector equipment can detect automatically along with N (representative does not detect the S0 signal) detects next signal, so projector equipment then can remove to detect the S1 signal, detect next signal (S1 is to Sn) so in order, up to detecting signal.Therefore,, then take turns again and searched other all signals (S1 is to the Sn signal) for one time afterwards, just can detect desired S0 signal (square 101) if will again search the S0 signal.Therefore it is longer that can draw detection time.
Yet modern business is almost seized every minute and second, if projector equipment search signal overlong time promptly equals away the time the waste participant.So reality is necessary to improve the pattern of this detection signal.
Summary of the invention
In view of the deficiencies in the prior art, the present invention provides a kind of method that detects computer signalling source in projector equipment automatically, and this method comprises: when no signal input projector equipment, detect a computer connector pin position wherein; Judge the voltage of this pin position, for example judge whether voltage is zero; Judge according to this voltage whether computer signalling source has been connected to projector equipment, if voltage is zero, and when not having other signals and importing this projector equipment, then this projector equipment sees through the signal that this computer connector reads this computer signalling source.
When if the voltage of this pin position is non-vanishing, then search other secondary signal source automatically, wherein the secondary signal source can comprise S terminal signals, AV terminal signal, component aberration terminal signals, D terminal signals, DVI terminal signals or HDMI terminal signals.
In addition, the method for automatic detection pcs signal of the present invention is to can be applicable to projector equipment, and wherein this projector equipment can be digital projector, front projection machine, back reflection projector, back projection TV or plasma television or the like.
For above-mentioned and other purposes of the present invention, feature and advantage can be become apparent, cited below particularlyly go out preferred embodiment, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 is the detection sequential schematic of traditional automatic detection signal;
Fig. 2 is the synoptic diagram that Display projector equipment is connected with other devices;
Fig. 3 is the process flow diagram according to automatic detection pcs signal of the present invention;
Fig. 4 is the detection sequential schematic according to automatic detection pcs signal of the present invention.
(main element symbol description)
20, projector equipment
21, computer
22, DVD device
23, TV signal device
Embodiment
Please refer to Fig. 2, projector equipment 20 of the present invention is to connect a plurality of signal sources (comprising various visual devices), for example computer (or notebook computer) 21, DVD device or TV signal device (for example cable TV signal device, HDTV telltale or SDTV telltale) 23.So, projector equipment 20 is to receive unlike signal, for example S terminal signals, AV terminal signal, component aberration terminal signals (3RCA, YUV, YcbCr or YPbPr), D terminal signals, DVI (Digital VisualInterface) terminal signals, HDMI (High-Definition Multimedia) terminal signals or other are similar, and according to its signal displaying contents.Typically, being connected between projector equipment 20 and the computer 21 is by by a computer connector, and D-Sub connector for example is to reach the transmission pcs signal.
In a plurality of unlike signals source, the method for automatic detection provided by the invention can detect the signal source of computer 21 apace and show its content.Please refer to the process flow diagram of Fig. 3, method of the present invention comprises: at step S31, detect a pin position (pin) of computer connector, for example, because D-Sub the 10th pin position is logic ground (Logic Ground), so it is different to judge its accurate potential difference to detect the 10th pin position of D-Sub connector.Then be step S32, judge whether the voltage of pin position (for example the 10th pin position of D-Sub connector) is zero.If voltage is zero, then come step S33, when not having other signal input projector equipments 20, then projector equipment 20 sees through the signal that computer connector reads computer 21 signal sources.Then, step S34, projector equipment 20 will read the signal and the displaying contents of computer 21 signal sources.
If in step S32, the voltage of judgement is not zero, next then is step S35, and projector equipment 20 can beginning detect next signal source (being defined as the secondary signal source), just other signal sources except computer 21 signal sources in regular turn.The secondary signal source can comprise that for example above-mentioned S terminal signals, AV terminal signal, component aberration terminal signals, D terminal signals, DVI terminal signals, HDMI terminal signals or other are similar.Next be exactly step S36, projector equipment 20 reads the signal and the displaying contents in secondary signal source, the blackout (step S37) up to the secondary signal source.
After the blackout in secondary signal source, get back to step S31, detect the pin position of computer connector, the 10th pin position for example is because the 10th pin position is I/O pin position (I/O pin), so can be detected fastly.
Therefore, square 401,403 as Fig. 4 ... shown S0 signal is the signal of computer 21 signal sources, also aforesaid flow process, S1 ... Sn then can represent S terminal signals, AV terminal signal, component aberration terminal signals, D terminal signals, DVI terminal signals or HDMI end signal or the like respectively.As any signal (S1 except computer 21 signal sources ... Sn) after the disappearance, projector equipment 20 detects earlier the pin position of computer connector apace, in case find that computer 21 is to be connected in projector equipment 20, then automatically switches to the signal that reads computer 21 signal sources.So, utilize the method for automatic detection computer signalling source of the present invention can shorten the time of the signal of searching computer 21 signal sources significantly, also can save user's time certainly.
In addition, as have the knack of this skill person known, the projector equipment 20 that the present invention censured can be that digital projector, front projection machine, back reflection projector, back projection TV, plasma television or other are similar.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (6)
1, a kind of method of automatic detection one computer signalling source, it is to be applied to a projector equipment, it is characterized in that, this method comprises:
Under situation, at first detect a pin position of a computer connector with a plurality of unlike signals source;
Judge a voltage of this pin position;
According to the voltage of this pin position, judge whether this computer signalling source has been connected to this projector equipment; And
If this computer signalling source has been connected to this projector equipment, and whether when no matter having other signals to import this projector equipment, then this projector equipment sees through the signal that this computer connector reads this computer signalling source;
If connecting signal is not computer signalling source, but a secondary signal source behind the blackout in secondary signal source, is then at first detected the pin position voltage of computer connector, and then judged whether to read computer signalling source; And when this voltage was zero volt, then this projector equipment detected this computer signalling source automatically and reads the signal of this computer signalling source.
2, the method for claim 1, it is characterized in that, the voltage of judging this pin position is to judge whether the voltage of the 10th pin position of this computer connector is zero volt, when the voltage of this pin position is zero volt, represents that this computer signalling source has been connected to this projector equipment.
3, the method for claim 1 is characterized in that, described this computer connector is a D-Sub connector.
4, the method for claim 1, it is characterized in that, the voltage of judging this pin position is to judge whether this voltage is zero volt, and when the voltage of this pin position was not zero volt, this projector equipment detected this secondary signal source automatically and reads the signal in this secondary signal source.
5, the method for claim 1 is characterized in that, described this secondary signal source comprises a S terminal signals, an AV terminal signal, a component aberration terminal signals, a D terminal signals, a DVI terminal signals or a HDMI terminal signals.
6, the method for claim 1 is characterized in that, described this projector equipment can be a digital projector, a front projection machine, a back reflection projector, a back projection TV or a plasma TV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100669666A CN100449452C (en) | 2005-04-25 | 2005-04-25 | Method for inspecting computer signalling source automatically |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100669666A CN100449452C (en) | 2005-04-25 | 2005-04-25 | Method for inspecting computer signalling source automatically |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1854964A CN1854964A (en) | 2006-11-01 |
| CN100449452C true CN100449452C (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100669666A Expired - Fee Related CN100449452C (en) | 2005-04-25 | 2005-04-25 | Method for inspecting computer signalling source automatically |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1434366A (en) * | 2002-01-21 | 2003-08-06 | Lg电子株式会社 | Method and equipment for treating input signal of display equipment |
| WO2003088070A1 (en) * | 2002-04-05 | 2003-10-23 | Infocus Corporation | Projector device network management system |
| CN1578433A (en) * | 2003-07-21 | 2005-02-09 | 三星电子株式会社 | Method and apparatus to display on-screen display user-guide information |
| US20050050239A1 (en) * | 2003-09-02 | 2005-03-03 | Yoji Kimura | Output switching device, output switching program, output switching program storage medium and output switching method |
-
2005
- 2005-04-25 CN CNB2005100669666A patent/CN100449452C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1434366A (en) * | 2002-01-21 | 2003-08-06 | Lg电子株式会社 | Method and equipment for treating input signal of display equipment |
| WO2003088070A1 (en) * | 2002-04-05 | 2003-10-23 | Infocus Corporation | Projector device network management system |
| CN1578433A (en) * | 2003-07-21 | 2005-02-09 | 三星电子株式会社 | Method and apparatus to display on-screen display user-guide information |
| US20050050239A1 (en) * | 2003-09-02 | 2005-03-03 | Yoji Kimura | Output switching device, output switching program, output switching program storage medium and output switching method |
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| Publication number | Publication date |
|---|---|
| CN1854964A (en) | 2006-11-01 |
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Granted publication date: 20090107 |