CN201967029U - Television and audio output circuit thereof - Google Patents
Television and audio output circuit thereof Download PDFInfo
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- CN201967029U CN201967029U CN2011200398504U CN201120039850U CN201967029U CN 201967029 U CN201967029 U CN 201967029U CN 2011200398504 U CN2011200398504 U CN 2011200398504U CN 201120039850 U CN201120039850 U CN 201120039850U CN 201967029 U CN201967029 U CN 201967029U
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- output circuit
- audio output
- loudspeaker
- switch
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Abstract
The utility model relates to the technical field of televisions and provides a television and an audio output circuit thereof. The audio output circuit of the television comprises a switch and a mute module. In the utility model, as an earphone is plugged into an earphone socket, the switch outputs mute control signal, meanwhile the mute module drives a loudspeaker driver module to enable a loudspeaker to be in the mute state according to the mute control signal. Therefore, the earphone is working while the loudspeaker of the television is in the mute state, no noise is generated and the electricity consumption is reduced.
Description
Technical field
The utility model belongs to technical field of television sets, relates in particular to a kind of television set and audio output circuit thereof.
Background technology
Now, the audio frequency way of output of television set mainly comprises earphone and loudspeaker dual mode.In existing earphone designing technique, before being to use, general way inserts the disconnected technology in back, two mechanical switch structures promptly are set in earphone socket inside, be placed on the passage of the left and right acoustic channels of voice output respectively, when inserting earphone, sound channel and loudspeaker are disconnected, sound is exported by earphone.
But there are some shortcomings in this technology, is exactly earphone when work, and the loudspeaker of television set are also in running order always, can produce noise like this, and can waste electric energy.
The utility model content
The purpose of this utility model is to provide a kind of tv audio output circuit, and when being intended to solve present television set and adopting the earphone output sound, its loudspeaker can produce the problem of noise.
As the utility model one embodiment, a kind of tv audio output circuit, described tv audio output circuit comprises earphone socket, loudspeaker driver module and loudspeaker, the input of described earphone socket and loudspeaker driver module all connects the L channel and the R channel of television set, and described tv audio output circuit also comprises:
When earphone inserts earphone socket, export the switch of quiet control signal; And
Be connected between described switch and the loudspeaker driver module,, drive the quiet module that described loudspeaker driver module control loudspeaker are in mute state according to described quiet control signal.
In the said structure, described switch adopts a normally closed mechanical switch, and described mechanical switch is positioned in the earphone socket, the input termination power of described mechanical switch, the described quiet module of the output termination of described mechanical switch.
In the said structure, described quiet module comprises:
Resistance R 1, resistance R 2, resistance R 3, capacitor C 1, triode Q1 and diode D1;
First termination power of described resistance R 1, the anode of the second terminating diode D1 of described resistance R 1, the negative electrode of described diode D1 connects the loudspeaker driver module, the anode of described diode D1 also connects the collector electrode of triode Q1, the grounded emitter of described triode Q1, the base stage of described triode Q1 is by capacitor C 1 ground connection, the base stage of described triode Q1 is first end of connecting resistance R2 also, the output of the described mechanical switch of second termination of described resistance R 2, described resistance R 3 are connected between second end and ground of resistance R 2.
Another purpose of the present utility model is to provide a kind of television set, and described television set comprises above-mentioned tv audio output circuit.
In the utility model, the tv audio output circuit is provided with switch and quiet module, when earphone inserted earphone socket, switch was exported quiet control signal, and quiet module is according to quiet control signal, drive loudspeaker driver module control loudspeaker and be in mute state, like this, earphone is when work, and the loudspeaker of television set are in mute state always, can not produce noise, reduce the consumption of electric energy yet.
Description of drawings
Fig. 1 is the circuit diagram of the tv audio output circuit that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Fig. 1 shows the circuit structure of the tv audio output circuit that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model embodiment.
The tv audio output circuit comprises earphone socket 100, loudspeaker driver module 200 and loudspeaker 300, the input of earphone socket 100 and loudspeaker driver module 200 all connects the L channel and the R channel of television set, and the tv audio output circuit also comprises switch 400 and quiet module 500.
When earphone inserts earphone socket 100, the quiet control signal of switch 400 outputs;
As the utility model one embodiment, switch 400 adopts a normally closed mechanical switch K1, and mechanical switch K1 is positioned at 100 li of earphone sockets, the input termination power of mechanical switch K1, the quiet module 500 of the output termination of mechanical switch K1.
As the utility model one embodiment, quiet module 500 comprises:
Resistance R 1, resistance R 2, resistance R 3, capacitor C 1, triode Q1 and diode D1;
First termination power of resistance R 1, the anode of the second terminating diode D1 of resistance R 1, the negative electrode of diode D1 connects loudspeaker driver module 200, the anode of diode D1 also connects the collector electrode of triode Q1, the grounded emitter of triode Q1, the base stage of triode Q1 is by capacitor C 1 ground connection, and the base stage of triode Q1 is first end of connecting resistance R2 also, the output of second termination machinery K switch 1 of resistance R 2, resistance R 3 is connected between second end and ground of resistance R 2.
1 pin of earphone socket 100 and 2 pin connect the L channel and the R channel of television set respectively, one normally closed mechanical switch K1 is set between 4 pin of earphone socket 100 and 5 pin, when not having earphone to insert, mechanical switch K1 closure, 4 pin link to each other with 5 pin, and this moment, second end of resistance R 2 was a high level, so triode Q1 conducting, so the current collection of triode Q1 is low level very, not conducting of diode D1; When earphone inserts, mechanical switch K1 disconnects, 4 pin and 5 pin disconnect, this moment, second end of resistance R 2 was a low level, so triode Q1 disconnects, power supply can provide high level to loudspeaker driver module 200 by resistance R 1 and diode D1, and loudspeaker driver module 200 control loudspeaker 300 are in mute state.
In the utility model, the tv audio output circuit is provided with switch and quiet module, when earphone inserted earphone socket, switch was exported quiet control signal, and quiet module is according to quiet control signal, drive loudspeaker driver module control loudspeaker and be in mute state, like this, earphone is when work, and the loudspeaker of television set are in mute state always, can not produce noise, reduce the consumption of electric energy yet.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (4)
1. tv audio output circuit, described tv audio output circuit comprises earphone socket, loudspeaker driver module and loudspeaker, the input of described earphone socket and loudspeaker driver module all connects the L channel and the R channel of television set, it is characterized in that described tv audio output circuit also comprises:
When earphone inserts earphone socket, export the switch of quiet control signal; And
Be connected between described switch and the loudspeaker driver module,, drive the quiet module that described loudspeaker driver module control loudspeaker are in mute state according to described quiet control signal.
2. tv audio output circuit as claimed in claim 1, it is characterized in that described switch adopts a normally closed mechanical switch, described mechanical switch is positioned in the earphone socket, the input termination power of described mechanical switch, the described quiet module of the output termination of described mechanical switch.
3. tv audio output circuit as claimed in claim 2 is characterized in that, described quiet module comprises:
Resistance R 1, resistance R 2, resistance R 3, capacitor C 1, triode Q1 and diode D1;
First termination power of described resistance R 1, the anode of the second terminating diode D1 of described resistance R 1, the negative electrode of described diode D1 connects the loudspeaker driver module, the anode of described diode D1 also connects the collector electrode of triode Q1, the grounded emitter of described triode Q1, the base stage of described triode Q1 is by capacitor C 1 ground connection, the base stage of described triode Q1 is first end of connecting resistance R2 also, the output of the described mechanical switch of second termination of described resistance R 2, described resistance R 3 are connected between second end and ground of resistance R 2.
4. a television set is characterized in that, described television set comprises each described tv audio output circuit as claim 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200398504U CN201967029U (en) | 2011-02-16 | 2011-02-16 | Television and audio output circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200398504U CN201967029U (en) | 2011-02-16 | 2011-02-16 | Television and audio output circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201967029U true CN201967029U (en) | 2011-09-07 |
Family
ID=44529581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200398504U Expired - Fee Related CN201967029U (en) | 2011-02-16 | 2011-02-16 | Television and audio output circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201967029U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111638865A (en) * | 2020-05-30 | 2020-09-08 | 深圳市亿道数码技术有限公司 | Hardware-controlled loudspeaker detection circuit and loudspeaker |
-
2011
- 2011-02-16 CN CN2011200398504U patent/CN201967029U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111638865A (en) * | 2020-05-30 | 2020-09-08 | 深圳市亿道数码技术有限公司 | Hardware-controlled loudspeaker detection circuit and loudspeaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20150216 |
|
| EXPY | Termination of patent right or utility model |