CN101064811B - Electronic device and method for communicating with external connection module - Google Patents
Electronic device and method for communicating with external connection module Download PDFInfo
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- CN101064811B CN101064811B CN200610077070A CN200610077070A CN101064811B CN 101064811 B CN101064811 B CN 101064811B CN 200610077070 A CN200610077070 A CN 200610077070A CN 200610077070 A CN200610077070 A CN 200610077070A CN 101064811 B CN101064811 B CN 101064811B
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Abstract
The invention discloses an electronic device and method which communicates with external module. The electronic device possesses a first group of signal transmitter; a second group of signal transmitter and a third group of signal transmitter, and the electronic device possesses a preset value. The method includes following steps: (1) when the external module is not coupled to the electronic module, the first group of signal transmitter and the second group of signal transmitter can be used to transmit a data signal; (2) when the external module is coupled to the electronic module, (a) the third group of signal transmitter transmits a inquiring signal to the external module; (b) when the third group of signal transmitter receives a affirming signal of the external module; and (c) if the affirming signal inosculates the preset value, the second group of signal transmitter transmits electricity power to the external module.
Description
Technical field
The present invention particularly determines whether electronic installation and the method for transmission of electric energy to external connection module by contrast confirmation signal and preset value about a kind of electronic installation of communicating by letter with external connection module and method.
Background technology
Present various information electronic product is used widely, and various application also is suggested successively.Fig. 1 shows a kind of known electronics assembling device and application mode thereof.Projector 100 is connected to a mobile computer 120 by connecting line 110, with transmission video signal.At this moment, mobile computer 120 transmits vision signals to projector 100 by connecting line 110, and by projector 120 with image projection to screen 130.This kind application has been applied to various occasions such as newspaper cutting, speech, product is delivered and illustrate widely.Yet, because projector 100 is for can be more compact, so the signaling interface kind that institute can be built-in often limits to some extent, for example general projector may have only D-Sub terminal, S terminal, video line-in, and less configuration HDTV, audio line-in, coaxial cable, aberration terminal, infrared remote controller, Ethernet input interface make the user can produce inconvenience in the use.
Therefore, if can provide external connection module to expand projector's 100 input interfaces, can give user's elasticity increase the more image/audio/computer networks of projector/infrared signal input interface or even in conjunction with megaphone may.Fig. 2 A and Fig. 2 B illustrate the mode of known employed external connection module.In Fig. 2 A structure, electronic installation 200 utilizes normal video interface 202, and for example D-Sub interface or DVI interface come transmission video signal to external connection module 240.Utilize an extra power supply power supply interface 204 to transmit electric energy in addition again to external connection module 240.Under this structure, external connection module 240 must be connected to two interfaces 202,204 simultaneously, not only increases the inconvenience on using, and more makes the volume of external connection module 240 cause restriction, and can't reach compact demand.
In the structure of Fig. 2 B, electronic installation 200 utilizes a dedicated video interface 206 to be connected to external connection module 240.By specially designed dedicated video interface 206, electronic installation 200 can transmit electric energy and vision signal simultaneously to external connection module 240.Yet the shortcoming of using dedicated video interface 206 is the compatibility of having sacrificed device.Usually different vendor can use the special purpose interface that himself designs, thereby makes the product between the different vendor to use mutually, thereby has limited user's selectivity.
Therefore, being necessary to provide a kind of communicates by letter with external connection module and the electronic installation and the method for electric energy is provided by the normal video interface.
Summary of the invention
One aspect of the present invention judges that whether confirmation signal coincide with preset value, determines whether transmission of electric energy is to external connection module.
The present invention's coffret by a standard on the other hand transmits electric energy and data-signal to external connection module.
The present invention discloses a kind of in an electronic installation and an external connection module method for communicating.This electronic installation has one first group of signal transmission device, one second group of signal transmission device and one the 3rd group of signal transmission device, and electronic installation stores a preset value.The method comprises the following step;
(1) when external connection module is not coupled to electronic installation, first group of signal transmission device and second group of signal transmission device can be used to transmit a data-signal;
(2) when external connection module is coupled to electronic installation:
(a) the 3rd group of signal transmission device transmits a request signal to external connection module;
(b) the 3rd group of signal transmission device receives the confirmation signal that external connection module responds; And
(c) if confirmation signal and preset value coincide, then second group of signal transmission device begins transmission of electric energy to external connection module.
The present invention discloses a kind of in an electronic installation and an external connection module method for communicating.This electronic installation has a coffret, and this coffret has one first group of signal transmission device, one second group of signal transmission device, one the 3rd group of signal transmission device and one the 4th group of signal transmission device.External connection module comprises an identification circuit and an external connection module circuit.First group of signal transmission device is used for transmission of data signals to external connection module.Electronic installation stores a preset value.The method comprises the following step;
The external connection module electrical couplings is to electronic installation;
The 4th group of signal transmission device transmits the identification circuit of one first electric energy to external connection module, with the running of the identification circuit of keeping external connection module;
The 3rd group of signal transmission device transmits the identification circuit of a request signal to external connection module;
The 3rd group of signal transmission device receives the confirmation signal that identification circuit responded of external connection module; And
If confirmation signal and preset value coincide, then second group of signal transmission device carried the external connection module circuit of one second electric energy to external connection module.
The present invention discloses a kind of electronic installation of communicating by letter with an external connection module, comprises one first group of signal transmission device, one second group of signal transmission device and one the 3rd group of signal transmission device.When external connection module was not coupled to electronic installation, first group of signal transmission device and second group of signal transmission device can be used to transmit a data-signal.When external connection module is coupled to electronic installation, transmits a request signal to external connection module, and receive a confirmation signal of external connection module response.If confirmation signal and preset value coincide, then second group of signal transmission device begins transmission of electric energy to external connection module.
The present invention discloses a kind of electronic installation of communicating by letter with an external connection module.External connection module comprises an identification circuit and an external connection module circuit.Electronic installation comprises a memory and a coffret.Memory stores has a preset value.Coffret is used for and the external connection module electrical couplings, and this coffret has one first group of signal transmission device, one second group of signal transmission device, one the 3rd group of signal transmission device and one the 4th group of signal transmission device.First group of signal transmission device is used for transmission of data signals to external connection module.The 4th group of signal transmission device is used to transmit the identification circuit of one first electric energy to external connection module, with the running of the identification circuit of keeping external connection module.The 3rd group of signal transmission device transmits the identification circuit of a request signal to external connection module, and receives the confirmation signal that identification circuit responded of external connection module.If confirmation signal and preset value coincide, then second group of signal transmission device carried the external connection module circuit of one second electric energy to external connection module.
Electronic installation of the present invention also comprises a wireless signal receiver, and external connection module also comprises a wireless signal transmitter.Wireless signal transmitter transmission one auxiliary confirmation signal is confirmed external connection module to wireless signal receiver for electronic installation.
Electronic installation of the present invention also comprises one first holding section, and external connection module also comprises one second holding section.When second holding section engaged with this first holding section, electronic installation allowed second group of signal transmission device transmission of electric energy to external connection module.
Description of drawings
Fig. 1 shows a kind of known electronic product and application thereof;
Fig. 2 A and the known mode that supplies power to external connection module of Fig. 2 B explanation;
Fig. 3 illustrates a kind of electronic installation and external connection module according to the specific embodiment of the invention;
Fig. 4 illustrates another kind of electronic installation and external connection module according to the specific embodiment of the invention;
Fig. 5 further specifies the coffret according to a specific embodiment of the invention;
Fig. 6 A to Fig. 6 E illustrates a kind of circuit diagram according to the specific embodiment of the invention; And
Fig. 7 illustrates a kind of method flow diagram according to the specific embodiment of the invention.
The main element symbol description:
100 projectors, 110 transmission lines
120 mobile computers, 130 screens
200 electronic installations, 202 normal video interfaces
204 power supply power supply interfaces, 206 dedicated video interfaces
240 external connection modules
300 electronic installations, 302 signal processing circuits
304 control circuits, 305 memories
306 power supplys, 308 coffrets
314 second groups of transmitters of 312 first groups of transmitters
The 4th group of transmitter of 316 the 3rd groups of transmitters 318
320 external connection modules, 322 module interfaces
323 external connection module circuit, 324 identification circuits
400 electronic installations, 402 wireless signal receivers
420 external connection modules, 422 wireless signal transmitters
424 second holding sections, 404 first holding sections
Embodiment
Figure 3 shows that a kind of electronic installation 300 and external connection module 320 according to the specific embodiment of the invention.Electronic installation 300 has a signal processing circuit 302, a control circuit 304, a memory 305, a power supply 306 and a coffret 308.External connection module 320 has a module interface 322, an identification circuit 324 and an external connection module circuit 323.Electronic installation 300 communicates by coffret 308 and external connection module 320.In the present embodiment, electronic installation 300 is a projector, and external connection module 320 can be a sound equipment, aberration terminal, infrared remote controller, or Ethernet interface circuit.And electronic installation 300 by external connection module 320 and with another device (a for example mobile computer) transmission/reception various types of signal.Yet those skilled in the art are when knowing that the present invention also can be applicable to other different various devices.For example in another embodiment, electronic installation 300 can be a LCD, communicates by external connection module 320 and another radio base station.
As previously mentioned, coffret in the present embodiment uses the normal video coffret, thereby have a compatibility with AN connector. when the coffret 308 of electronic installation 300 was not coupled to external connection module 320, it also can be coupled to a transmission line. and this moment, first group of signal transmission device 312 and/or second group of signal transmission device 314 were used for transmitting and/or received signal by this transmission line and other device.
The module interface 322 of external connection module 320 is corresponding with the coffret 308 of electronic installation 300, and for example module interface 322 can be a D-Sub connector or a DVI connector.When module interface 322 couplings of the coffret 308 of electronic installation 300 and external connection module 320, power supply 306 transmits the identification circuit 324 of one first electric energy to external connection module 320 by the 4th group of signal transmission device 318, to keep the basic running of identification circuit 324.Control circuit 304 transmits the identification circuit 324 of a request signal to external connection module 320 by the 3rd group of signal transmission device 316 at this moment, and receives the confirmation signal that identification circuit 324 is responded.When if the preset value in confirmation signal and the memory 305 coincide, then control circuit 304 is carried the external connection module circuit 323 of one second electric energy to external connection module 320 by second group of signal transmission device 314, and passes through first group of signal transmission device 312 transmitting video data signal to external connection module circuit 323.That is, the external connection module circuit 323 of external connection module 320 receives these second electric energy and keeps its running, to communicate by letter with the signal processing circuit 302 of this electronic installation 300, for example with the pairing image projection of data-signal to screen, or the signal that plays sound, or transmission/reception network signal.
Must be noted that at this, by the 4th group of first electric energy that signal transmission device 318 is transmitted, less than second electric energy that is transmitted by second group of signal transmission device 314.That is first electric energy only needs enough to operate to sufficient for identification circuit 324.And treat that electronic installation 300 receives the affirmation signal from identification circuit 324, identify be coupled to coffret 308 for behind the external connection module 320, just by second group of signal transmission device, 314 transmission, second electric energy to external connection module 320; To guarantee second group of signal transmission device 314 before carrying second electric energy, confirm that the coupling person of institute is really for bearing the external connection module 320 of higher second electric energy.
Therefore, when other connector beyond the external connection module 320 is coupled to coffret 308, second group of signal transmission device 314 non-electric energy transmitting that are used for, thereby can guarantee the support of 308 pairs of AN connector of this electronic installation 300 coffrets, and can not cause the damage of device.For example: when detecting the device that is coupled to coffret 308 is a standard DVI video signal connector, and then this second group of signal transmission device 314 is used to transmit the default video data signal of this standard DVI video-frequency connector.
Fig. 4 illustrates another kind of electronic installation 400 and external connection module 420 according to the specific embodiment of the invention.In Fig. 4 and Fig. 3, use identical numbering person to refer to similar elements, and the part identical with previous embodiment do not repeat them here.In this embodiment, electronic installation 400 also comprises a wireless signal receiver 402 (infrared ray or RF signal), and external connection module 420 also comprises a wireless signal transmitter 422.And when external connection module 420 is coupled to electronic installation 400, transmit first electric energy by the 4th group of signal transmission device 318 and give wireless signal transmitter 422, can transmission one assist confirmation signal by wireless signal transmitter 422, confirm external connection modules 420 for electronic installation 400 to wireless signal receiver 402.That is the defeated confirmation signal that helps can use with the affirmation signal collocation of previous embodiment, to guarantee before carrying second electric energy, confirms that the coupling person of institute is really for bearing the external connection module 420 of higher second electric energy.
Similarly, electronic installation also can further comprise one first holding section 404, and external connection module 420 further comprises one second holding section 424.And when external connection module 420 was coupled to electronic installation 400, second holding section 424 can engage with first holding section 404, thereby started a security mechanism, allowed second group of signal transmission device 314 transmission of electric energy to external connection module 420.Security mechanism when using this kind mechanism can be guaranteed still can guarantee other AN connector can not thought by mistake external connection module 420 when aforementioned confirmation signal and/or the inefficacy of auxiliary confirmation signal.In the present embodiment, first holding section 404 is a groove, and second holding section 424 is a protuberance.Yet in other embodiments, first holding section 404 can be other structure that is used to engage with second holding section 424.
Fig. 5 further specifies according to the coffret 308. of a specific embodiment of the invention in the present embodiment, coffret 308 is a DVI Complex interface (DVI-Integrated, DVI-I) the .DVI Complex interface is supported a kind of coffret of analog video and digital video. and this kind coffret has 29 pins (pins) altogether, shown in the various pins that are used to transmit and/or receive various signal .DVI-I are defined as follows:
| Pin | Explanation | Pin | | Pin | Explanation | |
| 1 | T.M.D.S. data 2- | 9 | T.M.D.S. data 1- | 17 | T.M.D.S. data 0- | |
| 2 | T.M.D.S. |
10 | T.M.D.S. |
18 | T.M.D.S. data 0+ | |
| 3 | T.M.D.S. |
11 | T.M.D.S. |
19 | T.M.D.S. |
|
| 4 | T.M.D.S. data 4- | 12 | T.M.D.S. data 3- | 20 | T.M.D.S. data 5- | |
| 5 | T.M.D.S. data 4+ | 13 | T.M.D.S. |
21 | T.M.D.S. |
|
| 6 | The |
14 | + |
22 | T.M.D.S. |
|
| 7 | The |
15 | Ground connection | 23 | T.M.D.S. |
|
| 8 | The simulation |
16 | Hot- |
24 | T.M.D.S. clock- | |
| C1 | Simulate red | C2 | Simulate green | C3 | Simulation is blue | |
| C4 | Dummy level is synchronous | C5 | Analogue ground |
The transition minimized differential signaling of DVI Complex interface support digital signal (TransitionMinimized Differential Signaling, TMDS), and analog signal.The details of other relevant DVI interface can be with reference to the Open Standard of DVI, and this repeats no more again.
Fig. 6 A to Fig. 6 E explanation is applied to the circuit diagram of an embodiment of the invention of DVI Complex interface, so that be illustrated more clearly in feature of the present invention.Please earlier with reference to shown in Fig. 6 A, when external connection module 420 ought not be coupled to electronic installation 400, an or AN connector when being coupled to electronic installation 400, the DVI Complex interface operates with mode standard, that is pin C1, C3, C5 be respectively applied for the transmission analog video, represents with DVI_RAIN, DVI_BAIN, DVI_GAIN among the figure.
And when external connection module 420 was coupled to the coffret 308 of electronic installation 400, as previously mentioned, electronic installation 400 transmitted the direct current identification circuit 324 extremely of a 5V by the 4th group of signal transmission device (pin 14=5V, pin 15=GND).
The former DVI video interface of pin 20 and 21 (the 3rd group of signal transmission device) is used for the pin of receiving high definition time series data, but this electronic installation 400 can't be accepted this high-resolution input data signal, so can change it into I2C, the bus of RS232 or one of them mode of GPID; So control circuit 304 sends request signal by pin 20 and 21 to external connection module 420 earlier, and then by pin 20 and the 21 affirmation signals that receive from external connection module 420.Control circuit 304 can judge whether the preset value in confirmation signal and the memory 305 coincide.When being judged as when coincideing, control circuit 304 can start the WIRELESS_EN signal of Fig. 6 B.
Please refer to Fig. 6 C, when second holding section 424 can engage with first holding section 404, thereby start a security mechanism, it for example is a switch, thereby can starting switch SW1. after SW1 and WIRELESS_EN all are activated, the circuit of Fig. 6 B then can be exported the signal of GPIO_SW. and this moment, the GPIO_SW signal can start the circuit shown in Fig. 6 D. and at this moment, electronic installation 400 can come transmission of electric energy to external connection module 420. by DVI_RAIN, DVI_BAIN and/or DVI_GAIN (that is former pin C1, C3, second group of signal transmission device of C5)
When electronic installation 400 identification external connection modules 420, and after finishing power supply, can utilize the circuit (first group of signal transmission device of UART2_TXD and UART2_RXD) as shown in Fig. 6 E again, communicate at electronic installation 400 and external connection module 420.
The foregoing description is used to enumerate explanation, but not is used to limit the present invention.The present invention can have many different modifications and variation in fact.For instance, communicating by letter between electronic installation 400 and the external connection module 420 is not to be defined in specific pin, and can utilize other idle in or the pin of not conflict transmit signal.For example, can also utilize horizontal-drive signal (Vertical Sync) and vertical synchronizing signal (HorizontalSync) the pin position one of them transmit this request signal, or confirmation of receipt signal.
Fig. 7 illustrates a kind of method flow diagram according to the specific embodiment of the invention.In step 702, external connection module 420 is coupled to the coffret 308 of electronic installation 400.In step 704, electronic installation 400 transmits basic electric energy to external connection module 420 by the 4th group of signal transmission device 318.In step 706, electronic installation 400 transmits a request signal to external connection module 420 by the 3rd group of signal transmission device 316.In step 708, electronic installation 400 receives knows the confirmation signal that external connection module 420 is responded.Judge in step 710 then whether this confirmation signal coincide with preset value.When if confirmation signal and preset value are misfitted, then electronic installation 400 can judge that coupling person is correct external connection module 420, and operates with mode standard, that is transmits vision signal by the pin of standard definition.If when confirmation signal and preset value coincide, then flow process proceeded to step 712, electronic installation 400 passes through second group of signal transmission device 314 transmission of electric energy to external connection module 420.In step 714, electronic installation 400 passes through first group of signal transmission device 312 transmission video signal to external connection module 420.
As previously mentioned, the invention provides the communication means between a kind of electronic installation and the external connection module, it uses the normal video coffret, and does not need the coffret of additional designs special use.Judge whether to provide electric energy by control circuit, and have the security mechanism of electronic type and mechanism's formula simultaneously, and can not produce the damage that the external connection module erroneous judgement is caused.
The above embodiments are in order to describe the present invention, and right the technology of the present invention still can have many modifications and variation.Therefore, the present invention is not limited to the description of above specific embodiment, and claim scope of the present invention desires to comprise all, and this type of is revised and variation, with real spirit according to the invention of energy and scope.
Claims (14)
1. an electronic installation and an external connection module method for communicating, this electronic installation has the coffret that uses the normal video coffret, this coffret comprises one first group of signal transmission device, one second group of signal transmission device and one the 3rd group of signal transmission device, this electronic installation stores a preset value, and this method comprises the following step;
(1) when this external connection module is not coupled to this electronic installation, this first group of signal transmission device and this second group of signal transmission device are used to transmit a data-signal;
(2) when this external connection module is coupled to this electronic installation:
(a) the 3rd group of signal transmission device transmits a request signal to this external connection module;
(b) the 3rd group of signal transmission device receives the confirmation signal that this external connection module responds; And
(c) if this confirmation signal and this preset value coincide, then this second group of signal transmission device begins transmission of electric energy to this external connection module.
2. the method for claim 1, wherein this coffret also comprises one the 4th group of signal transmission device, and before the 3rd group of signal transmission device transmitted this request signal, this method also comprised:
The 4th group of signal transmission device transmits a basic electric energy to this external connection module, produces this confirmation signal for this external connection module running.
3. the method for claim 1, wherein this electronic installation also comprises a wireless signal receiver, and this external connection module also comprises a wireless signal transmitter, and this method also comprises:
To this wireless signal receiver, confirm this external connection module by this wireless signal transmitter transmission one auxiliary confirmation signal for this electronic installation.
4. the method for claim 1, wherein this electronic installation also comprises one first holding section, and this external connection module also comprises one second holding section, and this method also comprises:
When this second holding section engages with this first holding section, allow this second group of signal transmission device transmission of electric energy to this external connection module.
5. an electronic installation and an external connection module method for communicating, this electronic installation has a coffret and a wireless signal receiver that uses the normal video coffret, this coffret has one first group of signal transmission device, one second group of signal transmission device, one the 3rd group of signal transmission device and one the 4th group of signal transmission device, this external connection module comprises an identification circuit, an one external connection module circuit and a wireless signal transmitter, this first group of signal transmission device is used for transmission of data signals to this external connection module, this electronic installation stores a preset value, and this method comprises the following step;
This external connection module electrical couplings is to this electronic installation;
The 4th group of signal transmission device transmits the identification circuit of one first electric energy to this external connection module, with the running of the identification circuit of keeping this external connection module;
The 3rd group of signal transmission device transmits the identification circuit of a request signal to this external connection module;
The 3rd group of signal transmission device receives the confirmation signal that identification circuit responded of this external connection module;
If this confirmation signal and this preset value coincide, then this second group of signal transmission device carried the external connection module circuit of one second electric energy to this external connection module; And
To this wireless signal receiver, confirm this external connection module by this wireless signal transmitter transmission one auxiliary confirmation signal for this electronic installation.
6. method as claimed in claim 5, wherein this electronic installation also comprises one first holding section, and this external connection module also comprises one second holding section, and this method also comprises:
When this second holding section engages with this first holding section, allow this second group of signal transmission device transmission of electric energy to this external connection module.
7. an electronic installation of communicating by letter with an external connection module comprises the coffret that uses the normal video coffret, and this coffret comprises:
One first group of signal transmission device;
One second group of signal transmission device, when this external connection module was not coupled to this electronic installation, this first group of signal transmission device and this second group of signal transmission device were used to transmit a data-signal; And
One the 3rd group of signal transmission device when this external connection module is coupled to this electronic installation, transmits a request signal to this external connection module, and receives a confirmation signal of this external connection module response;
Wherein, if this confirmation signal and preset value coincide, then this second group of signal transmission device begins transmission of electric energy to this external connection module.
8. electronic installation as claimed in claim 7, wherein this coffret also comprises:
One the 4th group of signal transmission device before the 3rd group of signal transmission device transmits this request signal, transmits a basic electric energy to this external connection module, produces this confirmation signal for this external connection module running.
9. electronic installation as claimed in claim 7 also comprises a wireless signal receiver, and this external connection module also comprises a wireless signal transmitter, and transmission one auxiliary confirmation signal is confirmed this external connection module to this wireless signal receiver for this electronic installation.
10. electronic installation as claimed in claim 7, also comprise one first holding section, and this external connection module also comprises one second holding section, wherein when this second holding section engages with this first holding section, allows this second group of signal transmission device transmission of electric energy to this external connection module.
11. electronic installation as claimed in claim 7, wherein this electronic installation utilizes the simulation RGB pin position of this second group of signal transmission device to come transmission of electric energy to this external connection module, and utilize the horizontal-drive signal of the 3rd group of signal transmission device and vertical synchronizing signal the pin position one of them transmit this request signal.
12. an electronic installation of communicating by letter with an external connection module, this external connection module comprise an identification circuit and an external connection module circuit, this electronic installation comprises:
One memory stores a preset value;
Use a coffret of normal video coffret, be used for and this external connection module electrical couplings, this coffret has:
Use one first group of signal transmission device of normal video coffret, be used for transmission of data signals to this external connection module;
Use one second group of signal transmission device of normal video coffret;
Use one the 3rd group of signal transmission device of normal video coffret, transmit the identification circuit of a request signal, and receive the confirmation signal that identification circuit responded of this external connection module to this external connection module;
Use one the 4th group of signal transmission device of normal video coffret, be used to transmit the identification circuit of one first electric energy, with the running of the identification circuit of keeping this external connection module to this external connection module; And
One wireless signal receiver;
Wherein, this external connection module also comprises a wireless signal transmitter, and transmission one auxiliary confirmation signal is confirmed this external connection module to this wireless signal receiver for this electronic installation;
If the affirmation signal that identification circuit responded of this external connection module and this preset value coincide, then this second group of signal transmission device carried the external connection module circuit of one second electric energy to this external connection module.
13. electronic installation as claimed in claim 12, also comprise one first holding section, and this external connection module also comprises one second holding section, wherein when this second holding section engages with this first holding section, allows this second group of signal transmission device transmission of electric energy to this external connection module.
14. electronic installation as claimed in claim 12, wherein this electronic installation utilizes the simulation RGB pin position of this second group of signal transmission device to come transmission of electric energy to this external connection module, and utilize the horizontal-drive signal of the 3rd group of signal transmission device and vertical synchronizing signal the pin position one of them transmit this request signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610077070A CN101064811B (en) | 2006-04-26 | 2006-04-26 | Electronic device and method for communicating with external connection module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610077070A CN101064811B (en) | 2006-04-26 | 2006-04-26 | Electronic device and method for communicating with external connection module |
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| CN101064811A CN101064811A (en) | 2007-10-31 |
| CN101064811B true CN101064811B (en) | 2010-05-12 |
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| CN200610077070A Expired - Fee Related CN101064811B (en) | 2006-04-26 | 2006-04-26 | Electronic device and method for communicating with external connection module |
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| CN102946521A (en) * | 2012-10-26 | 2013-02-27 | 圆刚科技股份有限公司 | Video and audio conversion system and video and audio conversion method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2133880Y (en) * | 1992-10-20 | 1993-05-19 | 北京昆仑电子印刷设备服务公司 | Video interface interconnecting card for canon-xerox laser printer |
| US6046823A (en) * | 1998-03-12 | 2000-04-04 | Avision Inc. | Interface control for analog signal processing |
| CN1484368A (en) * | 2002-08-23 | 2004-03-24 | 株式会社理光 | Power souree supply device and method thereof |
| CN1523474A (en) * | 2003-02-20 | 2004-08-25 | 联想(北京)有限公司 | Expanded interface system for projector and expanded module and controlling method therefor |
| CN1704896A (en) * | 2004-06-01 | 2005-12-07 | 联想(北京)有限公司 | Portable equipment video switching equipment and switching method thereof |
-
2006
- 2006-04-26 CN CN200610077070A patent/CN101064811B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2133880Y (en) * | 1992-10-20 | 1993-05-19 | 北京昆仑电子印刷设备服务公司 | Video interface interconnecting card for canon-xerox laser printer |
| US6046823A (en) * | 1998-03-12 | 2000-04-04 | Avision Inc. | Interface control for analog signal processing |
| CN1484368A (en) * | 2002-08-23 | 2004-03-24 | 株式会社理光 | Power souree supply device and method thereof |
| CN1523474A (en) * | 2003-02-20 | 2004-08-25 | 联想(北京)有限公司 | Expanded interface system for projector and expanded module and controlling method therefor |
| CN1704896A (en) * | 2004-06-01 | 2005-12-07 | 联想(北京)有限公司 | Portable equipment video switching equipment and switching method thereof |
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|---|---|
| CN101064811A (en) | 2007-10-31 |
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