CN1710436A - Signal output device and operation method - Google Patents
Signal output device and operation method Download PDFInfo
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- CN1710436A CN1710436A CN 200410049529 CN200410049529A CN1710436A CN 1710436 A CN1710436 A CN 1710436A CN 200410049529 CN200410049529 CN 200410049529 CN 200410049529 A CN200410049529 A CN 200410049529A CN 1710436 A CN1710436 A CN 1710436A
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- 238000001514 detection method Methods 0.000 claims description 38
- 230000005236 sound signal Effects 0.000 claims 2
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Abstract
The signal output device includes an output module and a test module. Connected to an output end, the output module is in use for outputting an output signal to the said output end based on a test signal. The said test module is in use for testing the state of the said output end in order to generate the test signal.
Description
Technical field
The invention provides a kind of signal output apparatus and method of operating thereof, be meant a kind of signal output apparatus and method of operating thereof especially with detection components.
Background technology
Fig. 1 is the function block schematic diagram of conventional output unit 10.Output unit 10 includes a signal output apparatus (signal transmitter) 12 and one display device 14.Signal output apparatus 12 includes a data processing circuit 16, one output circuits 18, and a connectivity port 20.Data processing circuit 16 can be to input data DATA decode computing and relevant treatment, and output image data DATA ', output circuit 18 is converted to simulating signal DATA with digital signal DATA ' "; and the display frame of " be delivered to display device 14, display device 14 shows respective signal DATA " with signal DATA via connectivity port 20 and a connecting line 22.
If signal output apparatus 12 is not connected to display device 14, be for opening circuit between signal output apparatus 12 and the display device 14, after signal output apparatus 12 starts (power on), since between signal output apparatus 12 and the display device 14 for opening circuit, therefore signal output apparatus 12 itself just can't drive display device 14 with display frame, yet, as well known in the art, data processing circuit 16 just can begin consumed power with output circuit 18 after starting, in other words, signal output apparatus 12 just can cause unnecessary power dissipation, if signal output apparatus 12 is arranged on the portable type electronic product (a for example mobile computer), then this portable type electronic product provides operation required power supply with a cell apparatus, that is the power-on time of this cell apparatus is shortened in above-mentioned unnecessary power dissipation meeting.
Summary of the invention
One of purpose of the present invention is to provide a kind of and has connection status that detection components detects a load device whether to determine the signal output apparatus and the method for operating thereof of output signal.
The present invention discloses a signal output apparatus, and this signal output apparatus includes an output precision, is connected to an output terminal, is used for exporting an output signal to this output terminal according to a detection signal; And a detection components, be used for detecting this output terminal to produce this detection signal.
The invention provides the method for operating of a kind of control one output signal output, comprise: export an output signal to an output terminal; Detect this output terminal to produce a detected value; And determine whether interrupting this output signal of output according to this detected value.
Signal output apparatus of the present invention and its method of operating can lower power consumption improperly effectively, in addition when signal output apparatus of the present invention when its output terminal does not connect external loading and turn-offs its output precision, signal output apparatus of the present invention also can reduce conventional output signal via output terminal to installing the electromagnetic interference (EMI) that is caused arround other.
Description of drawings
Fig. 1 is the function block schematic diagram of conventional multimedia play system.
Fig. 2 is the function block schematic diagram of signal output apparatus of the present invention.
Fig. 3 is the operational flowchart of signal output apparatus shown in Figure 2.
Fig. 4 is another operational flowchart of signal output apparatus shown in Figure 2.
The reference numeral explanation
100 signal output apparatus
110 output precisions
120 switch modules
130 signals provide assembly
140 detection components
150 detecting units
160 resistance units
Embodiment
Fig. 2 is the function block schematic diagram of signal output apparatus of the present invention (signal transmitter) 100.Signal output apparatus 100 includes an output precision 110, one switch modules 120, one signals provides assembly 130, one detection components 140, and a connectivity port 142.This detection components 140 includes a detecting unit 150 and a resistance unit 160.This signal output apparatus 100 receives an operating voltage (not being shown in Fig. 2) and begins operation.This output precision 110 is used for producing an output signal; Switch module 120 provides between assembly 130 and the connectivity port 142 between signal; Signal provides assembly 130 that a current signal or a voltage signal can be provided; Detection components 140 is used for detecting connectivity port 142 and whether is connected to an external loading.Connectivity port 142 is the output terminal of signal output apparatus 100, it can be used to connect an external loading, for example, signal output apparatus 100 is a DVD player, then connectivity port 142 just is connected to a display via a connecting line, perhaps signal output apparatus 100 is a sound equipment enlarger, and then connectivity port 142 just can be connected to loudspeaker via a connecting line.Note that signal output apparatus 100 of the present invention can be have output terminal with from any device of this output terminal output signal.
Fig. 3 is the operational flowchart of signal output apparatus 100 shown in Figure 2, includes the following step:
Step 200: output precision 110 produces an output signal So;
Step 202: detection components 140 detects the magnitude of voltage Vout of connectivity port 142:
Step 204: detection components 140 comparing voltage value Vout and a predetermined value, if magnitude of voltage Vout greater than this predetermined value, then carry out step 206,, then carry out step 200 if magnitude of voltage Vout is not more than this predetermined value;
Step 206: detection components 140 produces a control signal Sc and turn-offs output precision 110; And
Step 208: the function that starts hot plug (hot-plug-and-play).Among another embodiment, though should still continue input by input data DATA, but yet this signal output apparatus 100 shut-down operations and enter a standby mode (battery saving mode), after assembly 140 to be detected detects connectivity port 142 and external loading is connected, utilize this control signal Sc notice output precision 110 to enter normal manipulation mode again.Among another embodiment, this control signal Sc can directly interrupt this operating voltage of output precision 110, can reach less electricity consumption.
In the present embodiment, output precision 110 operates in current-mode, can produce the output signal So (step 200) with a specific current value I when promptly output precision 110 is handled a tentation data.The detecting unit 150 of detection components 140 just can detect the magnitude of voltage Vout (step 202) that connectivity port 142 is had, in addition, resistance unit 160 is used to provide a resistance with the connection status of 150 judgement connectivity ports 142, auxiliary detection unit with external loading, and its operation instructions is as follows.
Suppose that (for example: input impedance display) is 75 ohm to an external loading, and the resistance of resistance unit 160 is 75 ohm.When external loading is connected to connectivity port 142 via a connecting line, if do not consider the impedance that this connecting line and connectivity port 142 itself have, then the output impedance of signal output apparatus 100 can be considered 75 ohm in parallel with resistance unit 160, in other words, the product of the current value I that detecting unit 150 measured magnitude of voltage Vout can equal output signal So and 75 ohm of equivalent resistances in parallel with resistance unit 160 also is I*37.5.On the contrary, when external loading was not connected to connectivity port 142, then detecting unit 150 measured magnitude of voltage Vout were I*75.So, detection components 140 just can judge whether connectivity port 142 is connected to an external loading according to detected magnitude of voltage Vout, in the present embodiment, detecting unit 150 just comparing voltage value Vout and a predetermined value (for example I*56.25) is judged the connection status (step 204) of connectivity port 142, if magnitude of voltage Vout is greater than this predetermined value, represent that then this external loading is not connected with connectivity port 142, come to reach purpose of power saving (step 206) so stop the operation of output precision 110.Another embodiment, the control signal Sc of detecting unit 150 is the operation of controllable switch assembly 142 also, at this moment, switch module 142 just can conducting (switch on) so that signal provides assembly 130 to be connected to connectivity port 142, in the present embodiment, signal provides assembly 130 can produce one additionally to decide electric current I ss, so after output precision 110 stops to produce output signal So, extra decide electric current I ss and just can be 142 set up a voltage level Iss*75 in the connectivity port via resistance unit 160, even therefore output precision 110 shut-down operation, connectivity port 142 still can have a voltage level.Once this external loading is when being connected to connectivity port 142, extra decide electric current I ss and just can be 142 set up another voltage level Iss*37.5 in the connectivity port, therefore detecting unit 150 output control signal Sc control output precisions 110 restart, and gauge tap assembly 142 just can turn-off (switchoff), this output precision 110 exportable this output signal So drive this display, in sum, signal provides assembly 130 to be used for making connectivity port 142 have an output voltage when output precision 110 turn-offs and making signal output apparatus 100 have the function (step 208) of hot plug.
On the contrary, if magnitude of voltage Vout is not more than this predetermined value, represent that then this external loading is connected to connectivity port 142 really, therefore output precision 110 just can successfully produce output signal So and drive this display, in addition, step 200,202,204 can detect constantly whether this outside is negative interrupted with being connected of signal output apparatus 100.
Another embodiment, resistance unit 160 can be made of to produce desired resistance a plurality of resistance, in addition, the example that present embodiment drives a display with signal output apparatus 100 illustrates the operation of detection components 140, wherein output signal So meets CVBS, S-Video, the specification of YPbPr or RGB, yet, signal output apparatus 100 also can drive other load devices (for example loudspeaker), so resistance unit 160 just needs to use suitable resistance according to load device, and detection components 140 also need use suitable predetermined value to come execution in step 204, in other words, under different applied environments, signal output apparatus 100 of the present invention all can be via the operation that suitable detection components 140 reaches the connection status that detects an external connecting line is set.
Another embodiment, output precision 110 operates in voltage mode, that is when output precision 110 is handled a tentation data with generation output signal So, the corresponding magnitude of voltage of output signal So meeting, that is the different tentation data of output precision 110 processing can make the corresponding different magnitude of voltage of corresponding output signal So, at this moment, detection components 140 of the present invention also can detect the connection status of an external connecting line, see also Fig. 4, Fig. 4 is another operational flowchart of signal output apparatus 100 shown in Figure 2, includes the following step:
Step 300: output precision 110 produces an output signal So;
Step 302: detection components 140 detects the current value I out of connectivity port 142:
Step 304: detection components 140 is a current value I out and a predetermined value relatively, if magnitude of voltage Iout less than this predetermined value, then carry out step 306, if magnitude of voltage Vout is not less than this predetermined value, then carry out step 300;
Step 306: detection components 140 produces a control signal Sc and turn-offs output precision 110; And
Step 308: the function that starts hot plug.
When handling a tentation data, output precision 110 can produce output signal So (step 300) with a specific voltage value V.The detecting unit 150 of detection components 140 just can detect the current value I out (step 302) that connectivity port 142 is had, similarly, resistance unit 160 also is to be used for auxiliary detection unit 150 to judge the connection status of connectivity ports 142 and external loading, and its operation instructions is as follows.
Is example with a display as the external loading device of signal output apparatus 100, when this display is connected to connectivity port 142, then the output impedance of signal output apparatus 100 can be considered 75 ohm in parallel with resistance unit 160, the resistance of the controlling resistance unit 160 of present embodiment is 75 ohm, in other words, detecting unit 150 measured current value I out equal V/37.5.On the contrary, when this display was not connected to connectivity port 142, then the output impedance of signal output apparatus 100 was the resistance of resistance unit 160, and promptly detecting unit 150 measured current value I out equal V/75.
So, detecting unit 150 just can judge whether connectivity port 142 is connected to an external loading according to detected current value I out, in the present embodiment, detecting unit 150 just compares the connection status (step 304) that a current value I out and a predetermined value (for example V/56.25) are judged connectivity port 142, if current value I out is less than this predetermined value, represent that then this display is not connected to connectivity port 142, interrupt the operation of output precision 110 to reach purpose of power saving (step 306) so detecting unit 150 is just exported control signal Sc.When this display is not connected to connectivity port 142, this output precision 110 can be initiatively or the passive battery saving mode that enters.
On the contrary, if current value I out is not less than this predetermined value, represent that then this display is connected to the connectivity port 142 of signal output apparatus 100 really via a connecting line.
By last two embodiment as can be known, when output precision 110 operated in current-mode or voltage mode, detection components 140 can judge all whether connectivity port 142 is connected with an external loading, and the usefulness of further promoting this signal output apparatus 100.
The above only is preferred embodiment of the present invention, and all equivalences of carrying out according to claim of the present invention change and revise, and all should belong to covering scope of the present invention.
Claims (10)
1. signal output apparatus, it includes:
One output precision is used for according to a detection signal, and whether decision ends to export an output signal to an output terminal; And
One detection components is connected to this output terminal, is used for detecting this output terminal to produce this detection signal.
2. signal output apparatus as claimed in claim 1, wherein this detection components comprises:
One resistance unit; And
One detecting unit is connected to this resistance unit, is used for detecting this output signal and imports the detected value that this resistance unit produces.
3. signal output apparatus as claimed in claim 1, corresponding predetermined current value of this output signal wherein, this detection components detects a magnitude of voltage of this output terminal, and if this magnitude of voltage of this output terminal is greater than a predetermined value, then this detection components can produce this detection signal and interrupts this output signal of output to control this output precision.
4. signal output apparatus as claimed in claim 1, corresponding scheduled voltage of this output signal wherein, this detection components detects a current value of this output terminal, and if this current value of this output terminal is less than a predetermined value, then this detection components can produce this detection signal and interrupts this output signal of output to control this output precision.
5. signal output apparatus as claimed in claim 1 also comprises:
One signal provides assembly, is used for exporting a drive signal; And
One switch module is used for according to this detection signal, controls this drive signal and whether outputs to this output terminal;
Wherein if this output precision interrupts this output signal of output, then this drive signal outputs to this output terminal.
6. signal output apparatus as claimed in claim 1, wherein this output precision is a video or an audio signal output assembly.
7. control the method for operating that an output signal is exported for one kind, it includes:
Determine whether ending this output signal of output to an output terminal according to a detection signal; And
Detect this output terminal to produce this detection signal.
8. method as claimed in claim 7, corresponding predetermined current value of this output signal wherein, the detected value of this output terminal is a magnitude of voltage, and this method also includes:
If this magnitude of voltage, interrupts this output signal of output greater than a predetermined value.
9. method as claimed in claim 7, corresponding scheduled voltage of this output signal wherein, the detected value of this output terminal is a current value, and this method also includes:
If this current value, interrupts this output signal of output less than a predetermined value.
10. method as claimed in claim 7, wherein this output signal is a video or a sound signal, and this method also includes:
When this output signal is interrupted output, provide a drive signal to this output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100495299A CN100410672C (en) | 2004-06-16 | 2004-06-16 | Signal output device and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100495299A CN100410672C (en) | 2004-06-16 | 2004-06-16 | Signal output device and operation method |
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| Publication Number | Publication Date |
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| CN1710436A true CN1710436A (en) | 2005-12-21 |
| CN100410672C CN100410672C (en) | 2008-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100495299A Expired - Lifetime CN100410672C (en) | 2004-06-16 | 2004-06-16 | Signal output device and operation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378842A (en) * | 2012-04-19 | 2013-10-30 | 扬智科技股份有限公司 | Output circuit and method for detecting whether connecting port is connected to transmission line or not |
| CN104426524A (en) * | 2013-09-06 | 2015-03-18 | 扬智科技股份有限公司 | Output circuit, method for detecting whether connecting port is connected to load or not and image output circuit |
| CN106160725A (en) * | 2015-04-10 | 2016-11-23 | 扬智科技股份有限公司 | Whether output circuit is connected to the method for the connectivity port corresponding to output circuit with detecting load |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248984B (en) * | 2013-04-17 | 2017-02-08 | 佛山市毅丰电器实业有限公司 | Method for achieving hot plugging through audio power amplifier module supporting hot plugging |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR970008512B1 (en) * | 1994-11-30 | 1997-05-24 | 엘지전자 주식회사 | Automatic sensing apparatus with power saving function |
| US6523124B1 (en) * | 1999-04-23 | 2003-02-18 | Palm, Inc. | System and method for detection of an accessory device connection status |
| JP2000321941A (en) * | 1999-05-10 | 2000-11-24 | Ricoh Co Ltd | Image forming device |
| CN2424488Y (en) * | 2000-04-10 | 2001-03-21 | 商研株式会社 | Power source energy saving controller for computer |
| EP1517294A4 (en) * | 2002-06-25 | 2007-06-27 | Fujitsu Ltd | Display and power-saving controller |
-
2004
- 2004-06-16 CN CNB2004100495299A patent/CN100410672C/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378842A (en) * | 2012-04-19 | 2013-10-30 | 扬智科技股份有限公司 | Output circuit and method for detecting whether connecting port is connected to transmission line or not |
| CN103378842B (en) * | 2012-04-19 | 2016-01-06 | 扬智科技股份有限公司 | Whether output circuit is connected to the method for transmission line with detecting connectivity port |
| CN104426524A (en) * | 2013-09-06 | 2015-03-18 | 扬智科技股份有限公司 | Output circuit, method for detecting whether connecting port is connected to load or not and image output circuit |
| CN106160725A (en) * | 2015-04-10 | 2016-11-23 | 扬智科技股份有限公司 | Whether output circuit is connected to the method for the connectivity port corresponding to output circuit with detecting load |
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| Publication number | Publication date |
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| CN100410672C (en) | 2008-08-13 |
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Granted publication date: 20080813 |