CN100546351C - The power control of automobile-used 2.4G wireless video receiver - Google Patents
The power control of automobile-used 2.4G wireless video receiver Download PDFInfo
- Publication number
- CN100546351C CN100546351C CNB2008100190246A CN200810019024A CN100546351C CN 100546351 C CN100546351 C CN 100546351C CN B2008100190246 A CNB2008100190246 A CN B2008100190246A CN 200810019024 A CN200810019024 A CN 200810019024A CN 100546351 C CN100546351 C CN 100546351C
- Authority
- CN
- China
- Prior art keywords
- power
- circuit
- output
- power supply
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000001514 detection method Methods 0.000 claims abstract description 64
- 230000000087 stabilizing effect Effects 0.000 claims description 86
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 230000007704 transition Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 235000019506 cigar Nutrition 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Images
Abstract
The present invention relates to a kind of power control of 2.4G wireless video receiver, it comprises: power supply output detection circuit, power circuit and 2.4G wireless signal receive and output processing circuit; When the output current of the power output end of power supply output detection circuit during less than 1mA, the power output end non-transformer output of power circuit, the 2.4G wireless signal receives and output processing circuit quits work.When the output current of the power output end of power supply output detection circuit during greater than 100mA, the power output end of power circuit has power supply output, 2.4G wireless signal receives and output processing circuit gets electric and begin to receive the 2.4G wireless video signal, exports processing then.2.4G wireless video receiver among the present invention need not artificial its power supply of control separately, not only can economize on electricity but also made things convenient for use.
Description
Technical field
The present invention relates to a kind of power control of 2.4G wireless video receiver.
Background technology
2.4G frequency range is used in various short-distance wireless communications or the wireless control system as common frequency band.Chinese patent literature publication number CN1964471 discloses a kind of digital visual intercom of 2.4G common frequency band, it comprises power circuit, speech processing circuit, video processing circuits, central processing unit and the radio-frequency (RF) transmit-receive circuit and the antenna that are connected with central processing unit, speech processing circuit comprises microphone, loud speaker and the encoding and decoding speech circuit that is connected with central processing unit, microphone is connected the encoding and decoding speech circuit respectively with loud speaker, video processing circuits comprises display unit and the COMS camera that is connected with central processing unit respectively, radio-frequency (RF) transmit-receive circuit is made up of 2.4GHz frequency band digital transceiving chip and peripheral circuit, it can be at the digital visual intercommunication function of realizing the 2.4G common frequency band, can transmit voice simultaneously, video information realizes multimedia communication.
2.4G the wireless video device is applied in the automotive control system gradually, for example a 2.4G wireless camera is installed at automobile tail, in when reversing, this camera was sent to wireless mode captured automobile tail scene 2.4G wireless video receiver in the car with vision signal, the demonstration scene of taking the photograph on the last liquid crystal display screen before the driver.
Above-mentioned the deficiencies in the prior art are: the power supply of existing 2.4G wireless video receiver links to each other with automobile power source (being automobile storage battery) all the time, and power consumption is bigger, cut off its power supply and need artificial control separately, and the user often forgets its power supply of cut-out easily.
Summary of the invention
Technical problem to be solved by this invention provides a kind of the economize on electricity and the power control of automobile-used 2.4G wireless video receiver easy to use.
For solving the problems of the technologies described above, the power control of 2.4G wireless video receiver of the present invention comprises: power supply output detection circuit, power circuit and 2.4G wireless signal receive and output processing circuit; The power supply output detection circuit has power input, power output end and switching signal output; Power circuit has power input, power output end and switching signal input; 2.4G wireless signal receives and output processing circuit has power input; The power input conllinear of the power input of power supply output detection circuit and power circuit, and as the power input of this power control, the port that directly or indirectly links to each other with the automobile power source end when power input of this power control is to use; The switching signal output of power supply output detection circuit links to each other with the switching signal input of power circuit; The power output end of power circuit receives with the 2.4G wireless signal and the power input of output processing circuit links to each other; The port that links to each other with the power input of automobile-used power consumer apparatus when the power output end of power supply output detection circuit is to use.
When the output current of the power output end of power supply output detection circuit during less than 1mA, the switching signal output of power supply output detection circuit is a low level, the power output end non-transformer output of power circuit, reception of 2.4G wireless signal and output processing circuit outage also quit work;
When the output current of the power output end of power supply output detection circuit during greater than 100mA, the switching signal output of power supply output detection circuit is a high level, the power output end of power circuit has power supply output, 2.4G wireless signal receives and output processing circuit gets electric and begin to receive the 2.4G wireless video signal, exports processing then.
In the technique scheme, power circuit mainly comprises: voltage conversion circuit and voltage stabilizing circuit; The power input of voltage conversion circuit is the power input of power circuit; The power output end of voltage conversion circuit connects the power input of voltage stabilizing circuit; The power output end of voltage stabilizing circuit is the power output end of power circuit; Voltage conversion circuit be used for will input the DC power supply of 6-24V be converted to behind the direct current of 3-6V again from its power output end output; Voltage stabilizing circuit is used for behind the constant voltage direct current that direct current with the input of its power input carries out voltage transitions and voltage stabilizing and become 2-4V from its power output end output.
In the technique scheme, power circuit mainly comprises voltage stabilizing circuit, this voltage stabilizing circuit be used for will input the direct current of 5-6V carry out voltage transitions and voltage stabilizing and become behind the constant voltage direct current of 2-4V from its power output end output.
In the technique scheme, the 2.4G wireless signal receives and output processing circuit comprises: the video output driving circuit that 2.4G wireless video signal treatment circuit, the 2.4G wireless video signal receiving circuit that links to each other with the video signal input terminal of 2.4G wireless video signal treatment circuit link to each other with VT with 2.4G wireless video signal treatment circuit; The power input of described 2.4G wireless signal reception and output processing circuit is the power input of 2.4G wireless video signal treatment circuit, 2.4G wireless video signal receiving circuit and video output driving circuit.
In the technique scheme, the power supply output detection circuit comprises: the 2nd PNP triode, first resistance, second resistance, the 4th resistance and the NPN triode that are used for being arranged on the voltage stabilizing didoe, a PNP triode of power supply output loop, use as diode; The positive and negative electrode of voltage stabilizing didoe links to each other with the 2nd PNP transistor emitter with a PNP triode respectively, earth connection behind serial connection first resistance after the base stage of a PNP triode and the 2nd PNP triode links to each other; Connect the base stage of a NPN triode behind collector series connection the 4th resistance of the one PNP triode, the grounded emitter line of a NPN triode; Earth connection behind collector series connection second resistance of the one PNP triode; The collector electrode of the one NPN triode is the switching signal output of described power supply output detection circuit, the positive pole of voltage stabilizing didoe D2 is the power input of power supply output detection circuit 2, and the negative pole of voltage stabilizing didoe D2 is the power output end of power supply output detection circuit 2.
In the technique scheme, the port that links to each other with the power input of car borne GPS navigation instrument when the power output end of power supply output detection circuit is to use.
The present invention has positive effect: in the power control of (1) automobile-used 2.4G wireless video receiver of the present invention, the power output end of power supply output detection circuit connects other power consumer apparatus of using in the power input of GPS navigation instrument or other cars, as long as GPS navigation instrument or other power consumer apparatus are not closed, then the power output end of power supply output detection circuit has the electric current output greater than 100mA all the time, the switching signal output of power supply output detection circuit is a high level, the power output end of power circuit has power supply output, and the 2.4G wireless signal receives and output processing circuit can receive the 2.4G wireless video signal line output of going forward side by side and handles.When GPS navigation instrument or other power consumer apparatus are closed, the output current of the power output end of power supply output detection circuit is almost nil, promptly less than 1mA, the switching signal output that causes the power supply output detection circuit is a low level, the power output end non-transformer output of power circuit, reception of 2.4G wireless signal and output processing circuit outage also quit work.So, after the power output end of power supply output detection circuit connects the GPS navigation instrument,, 2.4G wireless video receiver is quit work as long as close the GPS navigation instrument; When the GPS navigation instrument normally uses, 2.4G wireless video receiver also electric operate as normal, realized the purpose of economize on electricity; Simultaneously, need not artificially separately the operating state of 2.4G wireless video receiver to be controlled, made things convenient for use.(2) among power supply output detection circuit of the present invention embodiment, when the output current of its power output end during greater than 100mA, the voltage difference at voltage stabilizing didoe D2 two ends is about 0.3V, the one PNP triode Q1 is in cut-off state, cause a NPN triode Q2 also to be in cut-off state, the collector electrode of the one NPN triode Q2 is that the switching signal output of described power supply output detection circuit is in high-impedance state, promptly be in high level state, the power output end of power circuit has power supply output, 2.4G wireless signal receives and output processing circuit gets electric and begin to receive the 2.4G wireless video signal, exports processing then.Otherwise, when the output current of its power output end during less than 1mA, the voltage difference at voltage stabilizing didoe two ends is almost nil, the one PNP triode is in conducting state, cause a NPN triode also to be in conducting state, the collector electrode of a NPN triode be the switching signal output of described power supply output detection circuit in low resistive state, promptly be in low level state, the power output end non-transformer output of power circuit, reception of 2.4G wireless signal and output processing circuit outage also quit work.So power supply output detection circuit of the present invention is simple in structure, with low cost and control procedure good reliability.(3) power circuit of the present invention can be taked multiple version, adopt corresponding circuit structure according to different voltage ranges, for example: for the automobile power source (also can in use connect into the output of 6V, 8V etc.) of 12-24V, power circuit mainly comprises: be used for will input the DC power supply of 6-24V be converted to the galvanic voltage conversion circuit of 3-6V and the galvanic voltage stabilizing circuit of constant voltage that direct current conversion and the voltage stabilizing of 3-6V become 2-4V; And for the DC power supply of automobile power source being carried out resulting 5-6V after the conversion, power circuit is that mainly comprise can be with the power source conversion of the 5-6V of this input and the galvanic voltage stabilizing circuit of constant voltage that voltage stabilizing becomes 2-4V.
Description of drawings
Fig. 1 is the circuit block diagram of the power control of 2.4G wireless video receiver of the present invention;
Fig. 2 is the power supply output detection circuit among Fig. 1 and the electrical schematic diagram of power circuit;
Fig. 3 is the another kind of power supply output detection circuit among Fig. 1 and the electrical schematic diagram of power circuit.
Embodiment
(embodiment 1)
See Fig. 1, the power control of the 2.4G wireless video receiver of present embodiment comprises: power supply output detection circuit 2, power circuit 4 and 2.4G wireless signal receive and output processing circuit 5; Power supply output detection circuit 2 has power input, power output end and switching signal output; Power circuit 4 has power input, power output end and switching signal input; 2.4G wireless signal receives and output processing circuit 5 has power input; The power input conllinear of the power input of power supply output detection circuit 2 and power circuit 4, and as the power input of this power control, the port that directly or indirectly links to each other with the automobile power source end when power input of this power control is to use.
The switching signal output of power supply output detection circuit 2 links to each other with the switching signal input of power circuit 4; The power output end of power circuit 4 receives with the 2.4G wireless signal and the power input of output processing circuit 5 links to each other the port that links to each other with the power input of car borne GPS navigation instrument when the power output end of power supply output detection circuit 2 is to use.
See Fig. 3, power supply output detection circuit 2 comprises: voltage stabilizing didoe D2, the PNP triode Q1, the 2nd PNP triode Q3, first resistance R 1, second resistance R 2, the 4th resistance R 4 and the NPN triode Q2 that are used for being arranged on the power supply output loop; The positive and negative electrode of voltage stabilizing didoe D2 links to each other with the 2nd PNP triode Q3 emitter with a PNP triode Q1 respectively, serial connection first resistance R 1 back earth connection after the base stage of a PNP triode Q1 and the 2nd PNP triode Q3 links to each other; Connect the base stage of a NPN triode Q2 after collector series connection the 4th resistance R 4 of the one PNP triode Q1, the grounded emitter line of a NPN triode Q2; The collector series connection second resistance R 2 back earth connections of the one PNP triode Q1; The collector electrode of the one NPN triode Q2 is the switching signal output of described power supply output detection circuit 2.The positive pole of voltage stabilizing didoe D2 is the power input of power supply output detection circuit 2, and the negative pole of voltage stabilizing didoe D2 is the power output end of power supply output detection circuit 2.The operating current of voltage stabilizing didoe D2 is 2A, and the conduction voltage drop when withstand voltage 40V, big electric current (100mA-1A) is 0.2-0.35V, and when conducting electric current during less than 1mA, conduction voltage drop is less than 0.05V.
Still see Fig. 3, when the voltage of automobile power source is power source voltage that 12-24V imports this power control when being 6-24V, power circuit 4 is made up of voltage conversion circuit 4-1, voltage stabilizing circuit 4-2 and filter circuit 4-3; The power input of voltage conversion circuit 4-1 is the power input of power circuit 4; The power output end of voltage conversion circuit 4-1 connects the power input of voltage stabilizing circuit 4-2; The power output end of voltage stabilizing circuit 4-2 is the power output end of power circuit 4; Voltage conversion circuit 4-1 be used for will input the direct current automobile power source of 12-24V be converted to the direct voltage of 3-5V and export voltage stabilizing circuit 4-2 to from power output end; Voltage stabilizing circuit 4-2 is used for the direct voltage of its power input input is carried out voltage stabilizing and export the 2.4G wireless signal to from its power output end receiving and output processing circuit 5.
Filter circuit 4-3 is made up of belt carcass inductance L 2 and capacitor C 2, is used for the high frequency composition of filter out power.
Voltage conversion circuit 4-1 comprises: DC conversion modules U4 and peripheral auxiliary circuits thereof; This peripheral auxiliary circuits comprises: capacitor C 5, C6, C8, C9, inductance L 1, voltage-stabiliser tube D1 and resistance R 5-R7.The power supply of importing this power control is sent into DC conversion modules U4 after belt carcass inductance L 2 IN end is the power input of voltage conversion circuit 4-1; The SW end of one termination DC conversion modules U4 of inductance L 1, its other end is exported the direct voltage of 3.8V, is the power output end of voltage conversion circuit 4-1.
Voltage stabilizing circuit 4-2 comprises: be output as the Voltage stabilizing module U3 of 3.3V direct voltage, the Voltage stabilizing module U2 that is output as the 2.5V direct voltage and their peripheral auxiliary circuits; This peripheral auxiliary circuits comprises: capacitor C 1, C3, C4, C11, C15, C16 and resistance R 10.The IN end of Voltage stabilizing module U2 and Voltage stabilizing module U3 is its power input, and the output 3.3V of Voltage stabilizing module U3 and Voltage stabilizing module U2 and the OUT of 2.5V direct voltage end are the power output end of power circuit 4.
See Fig. 1 and Fig. 3, the 2.4G wireless signal receives and output processing circuit 5 comprises: the video output driving circuit 5-3 that 2.4G wireless video signal treatment circuit 5-1, the 2.4G wireless video signal receiving circuit 5-2 that links to each other with the video signal input terminal of 2.4G wireless video signal treatment circuit 5-1 link to each other with VT with 2.4G wireless video signal treatment circuit 5-1; The power input of described 2.4G wireless signal reception and output processing circuit 5 is the power input of 2.4G wireless video signal treatment circuit 5-1,2.4G wireless video signal receiving circuit 5-2 and video output driving circuit 5-3.When using, the VT of video output driving circuit 5-3 links to each other with the video signal input terminal of liquid crystal display screen before the Che Nei driver.What the 2.4G wireless signal reception of present embodiment and the 2.4G wireless video signal treatment circuit 5-1 in the output processing circuit 5 were adopted is that the model that upright long-pending (Richwave) company in Taiwan makes is the integrated circuit of RTC6711, and 2.4G wireless video signal receiving circuit 5-2 and video output driving circuit 5-3 then adopt the upright circuit that company is recommended that amasss.The power supply of the 2.5V of the voltage stabilizing circuit 4-2 output of power circuit 4 links to each other with the power end of 2.4G wireless video signal receiving circuit 5-2 and the power end of 2.4G wireless video signal treatment circuit 5-1 respectively, and the power supply of the 3.3V of the voltage stabilizing circuit 4-2 output of power circuit 4 links to each other with the power end of video output driving circuit 5-3 and another power end of 2.4G wireless video signal treatment circuit 5-1 respectively.
The power control of present embodiment is to link to each other with cigar lighter seat as the automobile power source end by common cigar lighter, usually the cigar lighter seat is by the 12V storage battery power supply of automobile, so the input power supply of the power control in the present embodiment is 12V, behind the high frequency composition in the filter circuit 4-3 filter out power that this 12V power supply is formed by inductance L 2 and capacitor C 2, in the input IN end input module by DC conversion modules U4, through the processing and the control of module, export from the output SW end of U4 again.
When the power control of present embodiment was installed, the power output end of its power supply output detection circuit 2 linked to each other with the power input of car borne GPS navigation instrument.When power control got electric work, the 2nd PNP triode Q3 (its collector electrode is unsettled) that uses as diode of power supply output detection circuit 2 was in conducting state all the time.When the GPS navigation instrument cuts out, the output current of the power output end of power supply output detection circuit 2 (negative terminal of voltage stabilizing didoe D2) is less than 1mA, the voltage difference at voltage stabilizing didoe D2 two ends is almost nil, thereby make a PNP triode Q1 be in conducting state, and then cause a NPN triode Q2 also to be in conducting state, the collector electrode of the one NPN triode Q2 is that the switching signal output of described power supply output detection circuit 2 is in low resistive state, promptly be in low level state, the switching signal output that is power supply output detection circuit 2 is a low level, cause the EN end of described DC conversion modules U4 to be in low level state, and then cause the SW of DC conversion modules U4 to hold output low level, and then make the power output end (common junction of inductance L 1 and resistance R 5) of described voltage conversion circuit 4-1 be low level, thereby causing the SHND end of Voltage stabilizing module U2 among the described voltage stabilizing circuit 4-2 and Voltage stabilizing module U3 all is low level, make the OUT end no-voltage output of Voltage stabilizing module U2 and Voltage stabilizing module U3, be the power output end non-transformer output of power circuit 4, reception of 2.4G wireless signal and output processing circuit 5 outages also quit work.
When the GPS navigation instrument is normally opened work, the output current of the power output end of power supply output detection circuit 2 is greater than 100mA, the voltage difference at voltage stabilizing didoe D2 two ends is 0.3V, the one PNP triode Q1 is in cut-off state, cause a NPN triode Q2 also to be in cut-off state, the collector electrode of the one NPN triode Q2 is that the switching signal output of described power supply output detection circuit 2 is in high-impedance state, promptly be in high level state, promptly the switching signal output of power supply output detection circuit 2 is a high level; Because the EN of described DC conversion modules U4 end is constantly to charging with its capacitor C of contacting mutually 5, cause this EN end to be in high level state, make the power output end output 3.8V direct current of described voltage conversion circuit 4-1, thereby causing the SHND end of Voltage stabilizing module U2 among the described voltage stabilizing circuit 4-2 and Voltage stabilizing module U3 all is high level, make the OUT end of Voltage stabilizing module U3 and Voltage stabilizing module U2 export 3.3V and 2.5V direct voltage respectively, the power output end that is power circuit 4 has power supply output, 2.4G wireless signal receives and output processing circuit 5 gets electric and begin to receive the 2.4G wireless video signal, export processing then, show corresponding video image on the last liquid crystal display screen before the driver.
(embodiment 2)
On the basis of embodiment 1, there is following difference in present embodiment:
See Fig. 2, the power control of present embodiment when mounted, be that cigar lighter by having DC converting circuit links to each other with cigar lighter seat as the automobile power source end, at this moment, the power supply of importing this power control is 5V, power circuit 4 is made up of filter circuit 4-3 and voltage stabilizing circuit 4-2, has removed the voltage conversion circuit 4-1 of embodiment 1.Voltage stabilizing circuit 4-2 is used for the DC power supply of the 5V of input is converted to the constant voltage direct current of required numerical value and exports reception of 2.4G wireless signal and output processing circuit 5 to from its power output end.
The structure of this voltage stabilizing circuit 4-2 is identical with structure among the embodiment 1, comprising: be output as the Voltage stabilizing module U3 of 3.3V direct voltage, the Voltage stabilizing module U2 that is output as the 2.5V direct voltage and their peripheral auxiliary circuits; This peripheral auxiliary circuits comprises: capacitor C 1, C3, C4, C11, C15, C16 and resistance R 10.The IN end of Voltage stabilizing module U2 and Voltage stabilizing module U3 is its power input, and the output 3.3V of Voltage stabilizing module U3 and Voltage stabilizing module U2 and the OUT of 2.5V direct voltage end are the power output end of power circuit 4.But, directly hold as the collector electrode of a NPN triode Q2 of the switching signal output of power supply output detection circuit 2 to link to each other with the 3 pin SHDN of the 3 pin SHDN end of Voltage stabilizing module U3 and Voltage stabilizing module U2.
When the GPS navigation instrument cuts out, the output current of the power output end of power supply output detection circuit 2 is less than 1mA, the voltage difference at voltage stabilizing didoe D2 two ends is almost nil, the one PNP triode Q1 is in conducting state, cause a NPN triode Q2 also to be in conducting state, the collector electrode of the one NPN triode Q2 is that the switching signal output of described power supply output detection circuit 2 is in low resistive state, promptly be in low level state, causing the SHND end of Voltage stabilizing module U2 in the described voltage stabilizing circuit and Voltage stabilizing module U3 all is low level, make Voltage stabilizing module U2 and Voltage stabilizing module U3 the output of OUT end no-voltage, be the power output end non-transformer output of power circuit 4, reception of 2.4G wireless signal and output processing circuit 5 outages also quit work.
When the GPS navigation instrument is normally opened work, the output current of the power output end of power supply output detection circuit 2 is greater than 100mA, the voltage difference at voltage stabilizing didoe D2 two ends is 0.3V, the one PNP triode Q1 is in cut-off state, cause a NPN triode Q2 also to be in cut-off state, the collector electrode of a NPN triode is that the switching signal output of described power supply output detection circuit 2 is in high level state; Because the EN of described DC conversion modules U4 end is constantly to charging with its capacitor C of contacting mutually 5, cause this EN end to be in high level state, making the SHND end of Voltage stabilizing module U2 in the described Voltage stabilizing module circuit and Voltage stabilizing module U3 all is high level, make Voltage stabilizing module U3 and Voltage stabilizing module U2 OUT end export 3.3V and 2.5V direct voltage respectively, the power output end that is power circuit 4 has power supply output, 2.4G wireless signal receives and output processing circuit 5 gets electric and begin to receive the 2.4G wireless video signal, export processing then, show corresponding video image on the last liquid crystal display screen before the driver.
Claims (5)
1, a kind of power control of automobile-used 2.4G wireless video receiver is characterized in that: comprise that power supply output detection circuit (2), power circuit (4) and 2.4G wireless signal receive and output processing circuit (5); Power supply output detection circuit (2) has power input, power output end and switching signal output; Power circuit (4) has power input, power output end and switching signal input; 2.4G wireless signal receives and output processing circuit (5) has power input; The power input conllinear of the power input of power supply output detection circuit (2) and power circuit (4), and as the power input of this power control, the port that directly or indirectly links to each other with the automobile power source end when power input of this power control is to use;
The switching signal output of power supply output detection circuit (2) links to each other with the switching signal input of power circuit (4); The power output end of power circuit (4) receives with the 2.4G wireless signal and the power input of output processing circuit (5) links to each other; The port that links to each other with the power input of car borne GPS navigation instrument when the power output end of power supply output detection circuit (2) is to use;
When the output current of the power output end of power supply output detection circuit (2) during less than 1mA, the switching signal output of power supply output detection circuit (2) is a low level, the power output end non-transformer output of power circuit (4), reception of 2.4G wireless signal and output processing circuit (5) cut off the power supply and quit work;
When the output current of the power output end of power supply output detection circuit (2) during greater than 100mA, the switching signal output of power supply output detection circuit (2) is a high level, the power output end of power circuit (4) has power supply output, 2.4G wireless signal receives and output processing circuit (5) gets electric and begin to receive the 2.4G wireless video signal, exports processing then.
2, the power control of automobile-used 2.4G wireless video receiver according to claim 1 is characterized in that: power circuit (4) mainly comprises: voltage conversion circuit (4-1) and voltage stabilizing circuit (4-2); The power input of voltage conversion circuit (4-1) is the power input of power circuit (4); The power output end of voltage conversion circuit (4-1) connects the power input of voltage stabilizing circuit (4-2); The power output end of voltage stabilizing circuit (4-2) is the power output end of power circuit (4);
Voltage conversion circuit (4-1) be used for will input the DC power supply of 6-24V be converted to behind the direct current of 3-6V again from its power output end output; Voltage stabilizing circuit (4-2) is used for behind the constant voltage direct current that direct current with the input of its power input carries out voltage transitions and voltage stabilizing and become 2-4V from its power output end output.
3, the power control of automobile-used 2.4G wireless video receiver according to claim 1, it is characterized in that: power circuit (4) mainly comprises voltage stabilizing circuit (4-2), this voltage stabilizing circuit (4-2) be used for will input the direct current of 5-6V carry out voltage transitions and voltage stabilizing and become behind the constant voltage direct current of 2-4V from its power output end output.
4, the power control of automobile-used 2.4G wireless video receiver according to claim 1 is characterized in that: the 2.4G wireless signal receives and output processing circuit (5) comprising: the video output driving circuit (5-3) that 2.4G wireless video signal treatment circuit (5-1), the 2.4G wireless video signal receiving circuit (5-2) that links to each other with the video signal input terminal of 2.4G wireless video signal treatment circuit (5-1) link to each other with VT with 2.4G wireless video signal treatment circuit (5-1); The power input of described 2.4G wireless signal reception and output processing circuit (5) is the power input of 2.4G wireless video signal treatment circuit (5-1), 2.4G wireless video signal receiving circuit (5-2) and video output driving circuit (5-3).
5, according to the power control of the described automobile-used 2.4G wireless video receiver of one of claim 1 to 4, it is characterized in that: power supply output detection circuit (2) comprising: the 2nd PNP triode (Q 3), first resistance (R1), second resistance (R2), the 4th resistance (R4) and the NPN triode (Q2) that are used for being arranged on the voltage stabilizing didoe (D2), a PNP triode (Q1) of power supply output loop, use as diode;
The positive and negative electrode of voltage stabilizing didoe (D2) links to each other with the 2nd PNP triode (Q3) emitter with a PNP triode (Q1) respectively, serial connection first resistance (R1) back earth connection after the base stage of a PNP triode (Q1) and the 2nd PNP triode (Q3) links to each other; Connect the base stage of a NPN triode (Q2) behind collector series connection the 4th resistance (R4) of the one PNP triode (Q1), the grounded emitter line of a NPN triode (Q2); Collector series connection second resistance (R2) the back earth connection of the one PNP triode (Q1); The collector electrode of the one NPN triode (Q2) is the switching signal output of described power supply output detection circuit (2), the positive pole of voltage stabilizing didoe (D2) is the power input of power supply output detection circuit 2, and the negative pole of voltage stabilizing didoe (D2) is the power output end of power supply output detection circuit 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100190246A CN100546351C (en) | 2008-01-10 | 2008-01-10 | The power control of automobile-used 2.4G wireless video receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100190246A CN100546351C (en) | 2008-01-10 | 2008-01-10 | The power control of automobile-used 2.4G wireless video receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101217627A CN101217627A (en) | 2008-07-09 |
| CN100546351C true CN100546351C (en) | 2009-09-30 |
Family
ID=39623984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2008100190246A Expired - Fee Related CN100546351C (en) | 2008-01-10 | 2008-01-10 | The power control of automobile-used 2.4G wireless video receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100546351C (en) |
-
2008
- 2008-01-10 CN CNB2008100190246A patent/CN100546351C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101217627A (en) | 2008-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206820830U (en) | A kind of mounted remote wake-up circuit | |
| CN106383508A (en) | Electric automobile battery management system slave control module and test system thereof | |
| CN206413131U (en) | A kind of wireless microphone with Bluetooth function | |
| CN100546351C (en) | The power control of automobile-used 2.4G wireless video receiver | |
| CN201528386U (en) | Multifunctional detachable mobile terminal | |
| CN208239974U (en) | The main website machine device for providing power supply simultaneously using two lines bus and being communicated | |
| CN201153299Y (en) | Power supply control device of 2.4G wireless video receiver for automobile | |
| CN107399288A (en) | The electric power system and method for supplying power to of a kind of vehicle diagnostic device | |
| CN103701965B (en) | A kind of mobile communcations system | |
| CN209728740U (en) | Conduct boat system core plate in new automobile | |
| CN205787144U (en) | A kind of Big Dipper blue tooth voice communication system supporting to block more | |
| CN201887953U (en) | Vehicle-mounted navigation terminal system based on digital voice transmission | |
| CN207926874U (en) | A kind of bluetooth headset | |
| CN207184162U (en) | One kind is used for active power distribution network intelligent terminal battery isolation monitoring of structures | |
| CN208730717U (en) | Tire pressure monitoring integrated circuit, transmitter and receiver | |
| CN103108061A (en) | Mobile phone, device and method capable of conducting electric energy transfer based on mobile phone audio interface | |
| CN206658216U (en) | A kind of debugging apparatus of vehicle-mounted information service system | |
| CN201699839U (en) | Email arrival reminding circuit and remote control | |
| CN203251297U (en) | Vehicle-mounted power amplification system | |
| CN205176513U (en) | On -vehicle intelligent interactive system | |
| CN209134074U (en) | A kind of fast charge charging circuit and device | |
| CN103279443A (en) | Uart communication signal conversion circuit | |
| CN207491073U (en) | A kind of camera monitoring device, combined type camera monitoring device | |
| CN103491268B (en) | Wiredly turn wireless alarm system | |
| CN217443768U (en) | Intelligent battery data monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHANGZHOU WUJIN WUXIN ASSETS MANAGEMENT CO., LTD. Free format text: FORMER OWNER: JIANGSU SHINCO DIGITAL TECHNOLOGY CO., LTD.. Effective date: 20120719 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 213100 CHANGZHOU, JIANGSU PROVINCE TO: 213159 CHANGZHOU, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120719 Address after: 213159 Hutang, Jiangsu, Wujin District, the town of Yan Zheng Road, No. 28, No. Patentee after: Changzhou Wujin Wu Xin Asset Management Co.,Ltd. Address before: 213100 Jiangsu province high tech Industrial Development Zone of Wujin Gufang Road No. 1 Patentee before: JIANGSU SHINCO DIGITAL TECHNOLOGY Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090930 |