CN2682750Y - Television set having function of independent accompanying sound reception - Google Patents
Television set having function of independent accompanying sound reception Download PDFInfo
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- CN2682750Y CN2682750Y CNU2004200145464U CN200420014546U CN2682750Y CN 2682750 Y CN2682750 Y CN 2682750Y CN U2004200145464 U CNU2004200145464 U CN U2004200145464U CN 200420014546 U CN200420014546 U CN 200420014546U CN 2682750 Y CN2682750 Y CN 2682750Y
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Abstract
The utility model discloses a television set having function of accompanying sound independent listening reception. A sound accompanying power supply switching circuit is additionally arranged on the basis of a power supply which is in normal work and stand-by state. When the electric voltage of the television set descends to near 20v from a normal working voltage 130 v, a field scan circuit, a demoding circuit and a picture tube circuit are not in service, and thus the power consumption is obviously lowered; when a line output stage is cut off, the normal working power supply of the long time 'independent listening' television set is not over fractional load or zero load which results in frequency increasing, produces serious exothermic phenomenon, and thus the failure rate is low. With the addition of one switching circuit, the utility model costs lower than adding a new independent power supply.
Description
[technical field]:
The utility model relates to a kind of television set.
[background technology]:
Existing screen of TV set protection or " listening separately " technology only contrast and brightness are transferred to minimum value, and field scan, decoding circuit and picture tube circuit are being worked still, and power consumption is not obviously slowed down.Simultaneously, horizontal output stage superhigh pressure can rise to maximum when screen protection or " listening separately ", and easily moisture absorption causes the high voltage arc fault.If long-time " listening separately " can accomplish to cut off horizontal output stage, power consumption just can be reduced to minimum.But cause frequency to raise during owing to undue underloading of most normal operating conditions power supplys or zero load, produce the serious phenomenon of generating heat, fragile power supply and unfavorable picture tube.If adopt the technical scheme that increases new " listening separately " independent current source, will increase cost, bigger to the complete machine cost impact, there is no producer and use.And existing a kind of operate as normal Switching Power Supply standby power of holding concurrently, the operating frequency back that drops automatically is 20KHZ left and right sides low frequency in the time of can accomplishing that normal operating conditions switches to the strong attitude of standby.The drop about 1/6 automatically of main steady magnitude of voltage.Be in energy-efficient state, peak power output can be reduced to about 20W.
[summary of the invention]:
The purpose of this utility model is exactly at above-mentioned deficiency, provides a kind of both low to cost impact, can reduce the television set that possesses the independent auditory function of sound accompaniment of power consumption, minimizing failure rate again.
For achieving the above object, the utility model is by the following technical solutions: a kind of television set that possesses the independent auditory function of sound accompaniment, comprise operate as normal hold concurrently pressure swing type Switching Power Supply, microcontroller, high intercarrier signal and the sound processing system circuit of holding state, also comprise the sound accompaniment power supply switch circuit, described commutation circuit comprises two contacts at least, one of them contact connects the described operate as normal pressure swing type Switching Power Supply of holding state of holding concurrently, and second contact connects described audio power amplifier power output end, high intercarrier signal and sound processing system circuit power end; Described commutation circuit is used for work independently switching between the state of television set holding state and sound accompaniment.
Above-mentioned sound accompaniment power supply switch circuit comprises switching circuit 1 and connected control circuit; Described switching circuit 1 is used for when the steady voltage falling convergence of television set machine operate as normal master 20V, under the control of described control circuit, operate as normal held concurrently to switch between pressure swing type Switching Power Supply and described audio power amplifier power supply, high intercarrier signal and the sound processing system circuit power end of holding state to be connected or to disconnect.Described switching circuit 1 comprises relay K A2, described relay K A2 band single-pole double throw bit switch; Its hilted broadsword 0 connects amplifier power supply end and high intercarrier signal and sound processing system circuit power end, when the steady voltage falling convergence of television set machine operate as normal master 20V, relay K A2 hilted broadsword 0 resets without exception and connects contact P1, connect the operate as normal pressure swing type Switching Power Supply of holding state of holding concurrently, enter sound accompaniment and listen operating state separately.Described switching circuit 1 comprises thyristor SCR, the negative electrode of this thyristor SCR connects described audio power amplifier power supply, high intercarrier signal and sound processing system circuit power end, the hold concurrently pressure swing type Switching Power Supply of holding state of anode and described operate as normal is connected, and the gate utmost point is connected with the signal output part of described control circuit.Described switching circuit (1) also comprises clamp diode D716, and cross-over connection is used to prevent that the control of described thyristor scr gate is extremely partially anti-between the gate utmost point and negative electrode of described thyristor SCR.
Above-mentioned control circuit comprises to be listened turn-on control circuit 2 separately and listens releasing control circuit 3 separately, and the two signal output part is connected in parallel in the control end of described switching circuit 1, is used for controlling respectively the break-make of described switching circuit 1.Described independent tin of turn-on control circuit 2 comprises relay triode VKA2, preposition triode A5A, the first voltage-stabiliser tube D7A, sample resistance R61A, the second voltage-stabiliser tube D8A, feedback resistance R67A, the collector electrode of described relay triode VKA2 is connected with the control end of described relay, emitter grounding, base stage connect the collector electrode of described preposition triode A5A; Described preposition triode A5A collector electrode is connected with described relay triode VKA2 base stage, constitutes multiple tube, and described feedback resistance R67A cross-over connection is between described relay triode VKA2 collector electrode and preposition triode A5A base stage; The hold concurrently pressure swing type Switching Power Supply of holding state of the described first voltage-stabiliser tube D7A negative electrode and described operate as normal is connected, and anode is connected with described sample resistance R61A one end, sample resistance R61A other end ground connection; The described second voltage-stabiliser tube D8A negative electrode is connected with the contact of described first voltage-stabiliser tube D7A and sample resistance R61A, and anode is connected with described feedback resistance R67A.Described independent tin of releasing control circuit 3 comprises triode V21A, relay triode VKA2, the collector electrode of described relay triode VKA2 is connected with the control end of described relay, emitter grounding, base stage connects the collector electrode of described triode V21A, described triode V21A base stage is connected emitter grounding with the signal output part of described microcontroller.
Above-mentioned independent tin of turn-on control circuit 2 comprises diode D714, and its anode is connected with the VCC power supply, and negative electrode is connected with the control end of described switching circuit 1; Described independent tin of releasing control circuit 3 comprises voltage-stabiliser tube D712A, diode D713, triode V23A, described voltage-stabiliser tube D712A, diode D713 constitute one or, described voltage-stabiliser tube D712A negative electrode connects the operate as normal pressure swing type Switching Power Supply of holding state of holding concurrently, and diode D713 anode connects described microcontroller signal output part; Described triode V23A base stage is connected with signal output part described or door, and collector electrode is connected emitter grounding with the control end of described switching circuit 1.
Described independent tin of turn-on control circuit 2 comprises diode D715, and its anode is connected with described microcontroller, and negative electrode is connected with the control end of described switching circuit 1; Described independent tin of releasing control circuit 2 comprises triode V22A, and its base stage is connected with described microcontroller, and collector electrode is connected emitter grounding with the control end of described switching circuit 1.
The beneficial effect that brings thus is: 1) the utility model possesses the television set of the independent auditory function of sound accompaniment with respect to existing screen of TV set protection or " listening separately " technology; when television set is in sound accompaniment and works independently state; voltage drops to present 20 volts by 130 volts of normal working voltage; field scan, decoding circuit and picture tube circuit are no longer worked, and power consumption obviously reduces.2) cut off horizontal output stage and work for a long time in that " listen separately " state is real down, the normal operating conditions power supply is undue underloading or unloaded and cause frequency to raise not, produce the phenomenon of seriously generating heat, so failure rate is low.3) increase new " listening separately " power supply in addition, will increase cost, only need to increase a commutation circuit, influence to the complete machine cost will reduce much than increasing new independent current source, the utility model possesses the television set of television set new with respect to increasing in addition " listening separately " power supply of the independent auditory function of sound accompaniment, has reached the purpose that reduces cost.
[description of drawings]:
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is the utility model embodiment 1 circuit theory diagrams;
Fig. 3 is the utility model embodiment 2 circuit theory diagrams;
Fig. 4 is the utility model embodiment 3 circuit theory diagrams.
[embodiment]:
Below in conjunction with accompanying drawing, the utility model is elaborated.
The utility model has been set up the independent power supply handoff technique of sound accompaniment again on operate as normal can be held concurrently holding state power supply basis again, can be used for radio function under the performance holding state.At the operate as normal pressure swing type Switching Power Supply master load end+B of holding state that holds concurrently, increase a relay K A2 or thyristor SCR and relevant circuit thereof, if when needing true " listening separately " television audio, can make original Opportunity awaiting control for linear Switching Power Supply be in the narrow current impulse oscillatory regime of low frequency at intermittence that standby should need, when about the steady voltage+B of operate as normal master is by 130V, dropping convergence 20V, relay K A2 or thyristor SCR conducting, the 20V of the steady voltage of holding state power supply master is powered to audio power amplifier power supply AVCC by diode VD9A automatically, simultaneously by resistance R 22A step-down, high intercarrier signal and sound processing system are given in power supply after voltage stabilizing again, reach holding state power supply double again " listening separately " sound accompaniment power supply.
Embodiment one as shown in Figure 2, the television set that possesses the independent auditory function of sound accompaniment comprises operate as normal pressure swing type Switching Power Supply, audio power amplifier power supply, micro controller, high intercarrier signal and sound processing system circuit, the sound accompaniment power supply of the holding state commutation circuit that works independently of holding concurrently.Commutation circuit comprises switching circuit 1 and connected control circuit; Switching circuit 1 adopts relay K A2, the relay switch of KA2 is the single-pole double throw bit switch, its hilted broadsword 0 connects amplifier power supply end, high intercarrier signal and sound processing system power end, connect the hold concurrently pressure swing type Switching Power Supply of holding state of contact P1 and operate as normal and be connected, the single-pole double throw bit switch normality of KA2 is " opening ".Control circuit is divided into to be listened turn-on control circuit 2 separately and listens releasing control circuit 3 separately, listens turn-on control circuit 2 to comprise relay triode VKA2, preposition triode A5A, the first voltage-stabiliser tube D7A, sample resistance R61A, the second voltage-stabiliser tube D8A, feedback resistance R67A separately; Listen releasing control circuit 3 to comprise triode V21A, relay triode VKA2 separately.The collector connecting relay KA2 of this relay triode VKA2, grounded emitter, base stage connects the collector electrode of control triode V21A, the grounded emitter of this control triode V21A, base stage connects micro controller; The base stage of the collector connecting relay triode VKA2 of triode A5A, emitter connects the end of dropping resistor R22A, the end of another terminating diode VD9A of this resistance R 22A, another termination audio power amplifier power supply of this diode VD9A, the base stage of triode A5A is in series with diode D9A, VD5A, D8A, D7A, diode D7A connects the operate as normal pressure swing type Switching Power Supply of holding state of holding concurrently, the contact of diode D8A and D7A is connected with resistance R 61A, and relay K A2 connects described high intercarrier signal and sound processing system circuit.Behind relay triode VKA2 collector electrode and the preposition pipe A5A base stage adjunction positive feedback resistor branch road R67A thereof, constitute the voltage comparator that has hysteresis characteristic.Master's load end during operate as normal+B voltage height, voltage-stabiliser tube D7A and resistance R 61A sampling slip make resistance R 61A pressure drop big, and multiple tube A5A and VKA2 are turn-offed.When need were listened separately, voltage-stabiliser tube D7A ended, and resistance R 61 voltage drops are minimum, connected triode A5A bias source loop, chainly made multiple tube A5A and VKA2 conducting, and interlocking relay KA2 adhesive is connected under the holding state main load end as listening the sound accompaniment power supply very separately.When not needing to listen sound accompaniment separately, turn-off relay tube VKA2 by triode V21A and revert to standby power.This circuit has versatility, and anti-overload ability is strong, lower, the high reliability features of cost.Micro controller cpu instruction end PA forces to turn-off relay VKA2 by control valve V21A, reaches the realization holding state.
Embodiment two as shown in Figure 3, switching circuit 1 adopts thyristor SCR, the negative electrode of this thyristor SCR connects audio power amplifier power output end, high intercarrier signal and sound processing system circuit power end, by clamp diode D716 ground connection, anti-gate is extremely anti-to damage gate utmost point connection control circuit signal output part partially; Control circuit comprises to be listened turn-on control circuit 2 separately and listens releasing control circuit 3 separately; Listen turn-on control circuit 2 to comprise diode D714 separately, its anode is connected with the VCC power supply, and negative electrode is connected with the gate utmost point of thyristor SCR; Listen releasing control circuit 3 to comprise voltage-stabiliser tube D712A, diode D713, triode V23A separately; The thyristor scr gate control utmost point connects the collector electrode of triode V23A by a resistance, the grounded emitter of this triode V23A, base stage connects by biasing resistor or the signal output part of gate logic, this or gate logic comprise the diode D713 of a voltage-stabiliser tube D712A and series connection with it, the voltage-stabiliser tube negative electrode connects the described operate as normal pressure swing type Switching Power Supply of holding state of holding concurrently, diode D713 anode meets the signal output part Pa of microcontroller, the negative electrode of thyristor SCR connects the end of diode VD9A, the described audio power amplifier power supply of another termination of this diode VD9A.When adopting thyristor circuit, when main steady magnitude of voltage drop maybe need be by micro-controller command end Pa releasing " independent tin " sound accompaniment state to should needs value the time, respectively by voltage-stabiliser tube D712A and diode D713 assembly disjunction gate logical circuit, control triode V23A conducting/disconnections reaches and is/denys cutoff thyristor SCR purpose.The thyristor scr gate control utmost point can pass through diode D714 branch road triggering and conducting.Audio power amplifier power supply A VCC adverse current was to the 12V power supply when diode VD9A prevented normal operating conditions.
Embodiment three as shown in Figure 4, switching circuit 1 comprises thyristor SCR, the negative electrode of this thyristor SCR connects described high intercarrier signal and sound processing system circuit, and by clamp diode D716 ground connection, control end connects the negative electrode of two diac D15, D14 by resistance; Listen separately a releasing control circuit 3 to comprise control triode V22A, thyristor SCR control end connects the collector electrode of described control triode V22A by a resistance, the grounded emitter of this control triode V22A, and base stage connects micro controller by biasing resistor.
In the foregoing description two and three, when the operate as normal power supply enters standby/very separately during listen state, switching power supply enters the low-frequency stand-by energy-saving state in about 20KHZ left and right sides.Fall to about 20V about former operate as normal master's output 130V, the audio power amplifier feeder ear of former operate as normal just drops less than 4V naturally.Because thyristor control is extremely desirable to come from the audio power amplifier output or other is higher than 5V power supply or other pulse.If when control valve V22A or not conducting of V23A, just directly has the thyristor of triggering conducting function.Thyristor is after independent listen state conducting, and cathode potential raises and approaches about the about 20V of anode potential.In order not make the thyristor gate utmost point enter anti-state partially, increase diode D714 or D715 branch road in standby or independent listen state.Guarantee to control electrode potential and be not less than cathode potential.If when need removing independent listen state, force to make the gate utmost point to enter the disconnected thyristor state in anti-Pianguan County by control triode V22A or V23A.
Claims (10)
1, a kind of television set that possesses the independent auditory function of sound accompaniment, comprise operate as normal hold concurrently pressure swing type Switching Power Supply, microcontroller, high intercarrier signal and the sound processing system circuit of holding state, it is characterized in that: also comprise the sound accompaniment power supply switch circuit, described commutation circuit comprises two contacts at least, one of them contact connects the described operate as normal pressure swing type Switching Power Supply of holding state of holding concurrently, and second contact connects described audio power amplifier power output end, high intercarrier signal and sound processing system circuit power end; Described commutation circuit is used for work independently switching between the state of television set holding state and sound accompaniment.
2, the television set that possesses the independent auditory function of sound accompaniment according to claim 1 is characterized in that: described sound accompaniment power supply switch circuit comprises switching circuit (1) and connected control circuit; Described switching circuit (1) is used for when the steady voltage falling convergence of television set machine operate as normal master 20V, under the control of described control circuit, operate as normal held concurrently to switch between pressure swing type Switching Power Supply and described audio power amplifier power supply, high intercarrier signal and the sound processing system circuit power end of holding state to be connected or to disconnect.
3, the television set that possesses the independent auditory function of sound accompaniment according to claim 2 is characterized in that: described switching circuit (1) comprises relay (KA2), described relay (KA2) band single-pole double throw bit switch; Its hilted broadsword (0) connects amplifier power supply end and high intercarrier signal and sound processing system circuit power end, when the steady voltage falling convergence of television set machine operate as normal master 20V, relay (KA2) hilted broadsword (0) resets without exception and connects contact (P1), connect the operate as normal pressure swing type Switching Power Supply of holding state of holding concurrently, enter sound accompaniment and listen operating state separately.
4, the television set that possesses the independent auditory function of sound accompaniment according to claim 2, it is characterized in that: described switching circuit (1) comprises thyristor (SCR), the negative electrode of this thyristor (SCR) connects described audio power amplifier power supply, high intercarrier signal and sound processing system circuit power end, the hold concurrently pressure swing type Switching Power Supply of holding state of anode and described operate as normal is connected, and the gate utmost point is connected with the signal output part of described control circuit.
5, according to claim 2 or the 3 or 4 described television sets that possess the independent auditory function of sound accompaniment, it is characterized in that: described control circuit comprises to be listened turn-on control circuit (2) separately and listens releasing control circuit (3) separately, the two signal output part is connected in parallel in the control end of described switching circuit (1), is used for controlling respectively the break-make of described switching circuit (1).
6, the television set that possesses the independent auditory function of sound accompaniment according to claim 5, it is characterized in that: described independent tin of turn-on control circuit (2) comprises relay triode (VKA2), preposition triode (A5A), first voltage-stabiliser tube (D7A), sample resistance (R61A), second voltage-stabiliser tube (D8A), feedback resistance (R67A), the collector electrode of described relay triode (VKA2) is connected with the control end of described relay, emitter grounding, base stage connect the collector electrode of described preposition triode (A5A); Described preposition triode (A5A) collector electrode is connected with described relay triode (VKA2) base stage, constitutes multiple tube, and described feedback resistance (R67A) cross-over connection is between described relay triode (VKA2) collector electrode and preposition triode (A5A) base stage; The hold concurrently pressure swing type Switching Power Supply of holding state of described first voltage-stabiliser tube (D7A) negative electrode and described operate as normal is connected, and anode is connected with described sample resistance (R61A) end, sample resistance (R61A) other end ground connection; Described second voltage-stabiliser tube (D8A) negative electrode is connected with the contact of described first voltage-stabiliser tube (D7A) with sample resistance (R61A), and anode is connected with described feedback resistance (R67A).
7, the television set that possesses the independent auditory function of sound accompaniment according to claim 6, it is characterized in that: described independent tin of releasing control circuit (3) comprises triode (V21A), relay triode (VKA2), the collector electrode of described relay triode (VKA2) is connected with the control end of described relay, emitter grounding, base stage connects the collector electrode of described triode (V21A), described triode (V21A) base stage is connected emitter grounding with the signal output part of described microcontroller.
8, the television set that possesses the independent auditory function of sound accompaniment according to claim 5, it is characterized in that: described independent tin of turn-on control circuit (2) comprises diode (D714), its anode is connected with the VCC power supply, and negative electrode is connected with the control end of described switching circuit (1); Described independent tin of releasing control circuit (3) comprises voltage-stabiliser tube (D712A), diode (D713), triode (V23A), described voltage-stabiliser tube (D712A), diode (D713) constitute one or, described voltage-stabiliser tube (D712A) negative electrode connects the operate as normal pressure swing type Switching Power Supply of holding state of holding concurrently, and diode (D713) anode connects described microcontroller signal output part; Described triode (V23A) base stage is connected with signal output part described or door, and collector electrode is connected emitter grounding with the control end of described switching circuit (1).
9, the television set that possesses the independent auditory function of sound accompaniment according to claim 5, it is characterized in that: described independent tin of turn-on control circuit (2) comprises diode (D715), its anode is connected with described microcontroller, and negative electrode is connected with the control end of described switching circuit (1); Described independent tin of releasing control circuit (2) comprises triode (V22A), and its base stage is connected with described microcontroller, and collector electrode is connected emitter grounding with the control end of described switching circuit (1).
10, the television set that possesses the independent auditory function of sound accompaniment according to claim 7, it is characterized in that: described switching circuit (1) also comprises clamp diode (D716), cross-over connection is between the gate utmost point and negative electrode of described thyristor (SCR), be used for the anti-potential difference partially of clamper thyristor (SCR) gate utmost point target and be not higher than 0.7V, prevent that described thyristor (SCR) gate is extremely anti-excessive partially and damage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200145464U CN2682750Y (en) | 2004-01-02 | 2004-01-02 | Television set having function of independent accompanying sound reception |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200145464U CN2682750Y (en) | 2004-01-02 | 2004-01-02 | Television set having function of independent accompanying sound reception |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2682750Y true CN2682750Y (en) | 2005-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200145464U Expired - Fee Related CN2682750Y (en) | 2004-01-02 | 2004-01-02 | Television set having function of independent accompanying sound reception |
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| Country | Link |
|---|---|
| CN (1) | CN2682750Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101072294B (en) * | 2006-05-12 | 2010-06-09 | 深圳Tcl新技术有限公司 | Standby mode low-power-consumption flow media automatic play device |
| CN101388983B (en) * | 2008-10-10 | 2010-06-09 | 深圳创维－Rgb电子有限公司 | Method for automatic recognition and switching M mode of sound |
| CN101795367A (en) * | 2009-04-28 | 2010-08-04 | 孟令松 | Audio-visual equipment that can turning off images and only listening to sound |
-
2004
- 2004-01-02 CN CNU2004200145464U patent/CN2682750Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101072294B (en) * | 2006-05-12 | 2010-06-09 | 深圳Tcl新技术有限公司 | Standby mode low-power-consumption flow media automatic play device |
| CN101388983B (en) * | 2008-10-10 | 2010-06-09 | 深圳创维－Rgb电子有限公司 | Method for automatic recognition and switching M mode of sound |
| CN101795367A (en) * | 2009-04-28 | 2010-08-04 | 孟令松 | Audio-visual equipment that can turning off images and only listening to sound |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050302 Termination date: 20110102 |