CN204442521U - Standby data protection circuit and television set - Google Patents
Standby data protection circuit and television set Download PDFInfo
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- CN204442521U CN204442521U CN201520081152.9U CN201520081152U CN204442521U CN 204442521 U CN204442521 U CN 204442521U CN 201520081152 U CN201520081152 U CN 201520081152U CN 204442521 U CN204442521 U CN 204442521U
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Abstract
The utility model discloses a kind of standby data protection circuit and television set, this standby data protection circuit comprises the first power end connecting standby power, connect the second source end of start power supply, power transfer device, power supply change-over device and energy storage device, power transfer device has the first input end and the second input that switch input, first input end is connected with the first power end, second input is connected with second source end, the output of power transfer device is connected with the input of power supply change-over device, the output of power supply change-over device connects the internal memory of television set, energy storage/the output of energy storage device is connected with the first input end of power transfer device.The utility model solves the internal memory power down of television set and causes standby failed problem, and it is simple that the utility model also has circuit structure, lower-cost advantage.
Description
Technical field
The utility model relates to a kind of standby data protection circuit and television set.
Background technology
Along with the development of TV tech, intelligent TV set has increasing function, has enriched the selection of user greatly; Simultaneously also along with digitlization, the intellectuality of television set, its built-in system also becomes 32 of complexity or the ARM system of 64 by simple 4 and 8.During startup, its program run is also the same with computer, just using state can be entered after needing operation one section of program, this process generally will wait for for 20 to 40 seconds, for the user getting used to starting shooting with regard to TV can be watched, just seem veryer long, Consumer's Experience is poor, and the viewing time of waste user.
And current solution is, when television standby, the internal memory of television set is allowed to work on, for preservation data, when by the time again starting shooting, only MCU need be started, the advantage of this way is that circuit cost is lower, the available machine time is also very fast, can meet the demand of most of user.But adopt this way, necessarily require the internal memory of television set (DDR) to take the mode of duplicate supply: when normally working, internal memory is powered by the main power source (start power supply) of television set; Time standby, powered by the standby power (ST-BY power supply) of television set.But in this scheme, because the standby power capacity of television set is less, the ability of reply grid transient is more weak, in television standby state, usually because export transient state power down and make internal memory lose data, cause standby failed and cause deadlock phenomenon; In addition, when also there is user misoperation TV and turn off standby power, also can make television shutdown, and when again starting shooting, wait for again and for a long time could start.
Foregoing, only for auxiliary understanding technical scheme of the present invention, does not represent and admits that foregoing is prior art.
Utility model content
Main purpose of the present utility model is to provide a kind of standby data protection circuit, and after being intended to realize the unexpected power down of TV standby power supply, the object that the internal memory of television set can work on, avoids standby failure.
For achieving the above object, the utility model provides a kind of standby data protection circuit, this standby data protection circuit comprises the first power end connecting standby power, connect the second source end of start power supply, power transfer device, power supply change-over device and energy storage device, described power transfer device has the first input end and the second input that switch input, described first input end is connected with described first power end, described second input is connected with described second source end, the output of described power transfer device is connected with the input of described power supply change-over device, the output of described power supply change-over device connects the internal memory of television set, energy storage/the output of described energy storage device is connected with the first input end of described power transfer device, wherein, described power transfer device controls described start power supply or described standby power inputs to power supply change-over device according to the supply voltage size of the first power end and second source input, the supply voltage of input is converted to default supply voltage by described power supply change-over device, normally works for internal memory, the standby power that described energy storage device receives described first power end input carries out energy storage, and when described first power end is without input, release electricity is to described power transfer device.
Preferably, described energy storage device comprises the first electric capacity, and the first end of described first electric capacity is the energy storage/output of described energy storage device, the second end ground connection of described first electric capacity.
Preferably, the capacitance of described first electric capacity is greater than or equal to 10 millifarads.
Preferably, described power transfer device comprises the first diode and the second diode, and the anode of described first diode is the first input end of described power transfer device, and the negative electrode of described first diode is connected with the input of described power supply change-over device; The anode of described second diode is the second input of described power transfer device, and the negative electrode of described second diode is connected with the input of described power supply change-over device.
Preferably, described power supply change-over device is buck mode DC-DC converter.
Preferably; described standby data protection circuit also comprises power supply circuits; the input of described power supply circuits is connected with described first power end; the output of described power supply circuits is connected with the energy storage/output of described energy storage device and the input of described power transfer device respectively; described power supply circuits receive the standby power of the first power end input; and flow to energy storage device after the standby power of input is carried out constant current, constant voltage, for described energy storage device charging energy-storing.
Preferably, described power supply circuits comprise the first triode, the second triode, the 3rd triode, the first resistance, the second resistance, the 3rd resistance, the 4th resistance and the 5th resistance, the collector electrode of described first triode is connected with described first power end, the base stage of described first triode is connected with the first end of the collector electrode of described second triode, the first resistance, the collector electrode of the 3rd triode, and the emitter of described first triode is connected with the first end of described second resistance; Second end of described first resistance is connected with described first power end; Second end of described second resistance is connected with the first end of described first electric capacity and the first input end of described power transfer device, the grounded emitter of described second triode; The base stage of described 3rd triode is connected with the emitter of described first triode, the first end of the second resistance through described 3rd resistance, and the emitter of described 3rd triode is connected with the second end of described second resistance; The emitter of the first end of described 4th resistance and the second end of described second resistance, the 3rd triode, the energy storage/output of energy storage device, the first input end of power transfer device are connected, and the second end of described 4th resistance is connected with the described first end of the 5th resistance, the base stage of the second triode; Second end ground connection of described 5th resistance.
In addition, for achieving the above object, the present invention also provides a kind of television set, and described television set comprises standby data protection circuit as above; Described standby data protection circuit comprises the first power end connecting standby power, the second source end connecting start power supply, power transfer device, power supply change-over device and energy storage device, described power transfer device has the first input end and the second input that switch input, described first input end is connected with described first power end, described second input is connected with described second source end, the output of described power transfer device is connected with the input of described power supply change-over device, and the output of described power supply change-over device connects the internal memory of television set; Energy storage/the output of described energy storage device is connected with the first input end of described power transfer device; Wherein, described power transfer device controls described start power supply or described standby power inputs to power supply change-over device according to the supply voltage size of the first power end and second source input; The supply voltage of input is converted to default supply voltage by described power supply change-over device, normally works for internal memory; The standby power that described energy storage device receives described first power end input carries out energy storage, and when described first power end is without input, release electricity is to described power transfer device.
The utility model is by arranging the first power end in order to connect standby power, connect the second source end of start power supply, the supply voltage of input is converted to default supply voltage, for the power supply change-over device that internal memory normally works, supply voltage size according to the first power end and second source input controls the power transfer device that described start power supply or described standby power input to power supply change-over device, and the standby power receiving described first power end input carries out energy storage, and when described first power end is without input, release electricity is to the energy storage device of described power transfer device, due to energy storage device first power end source for no-standby electrical input or brownout time, automatic release electricity keeps normal work for the internal memory of television set, thus avoid the internal memory power down of television set and cause standby failed problem, and, it is simple that the standby data protection circuit of the utility model also has circuit structure, lower-cost advantage.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the standby data protection circuit preferred embodiment of the utility model;
Fig. 2 is the electrical block diagram of the standby data protection circuit preferred embodiment of the utility model.
The realization of the utility model object, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of standby data protection circuit; be applicable in television set; for television set be under holding state because of the voltage of unexpected power down or standby power input can not support the internal memory work of this television set time; out-put supply normally works for internal memory; ensure that internal memory can also work a period of time, avoid standby failure.
With reference to Fig. 1 and Fig. 2, in one embodiment, described standby data protection circuit comprises the first power end V1 connecting standby power, connect the second source end V2 of start power supply, the supply voltage of input is converted to default supply voltage, for the power supply change-over device 10 that the internal memory 100 of television set normally works, the supply voltage size inputted according to the first power end V1 and second source end V2 controls the power transfer device 20 that described start power supply or described standby power input to power supply change-over device 10, and the standby power receiving described first power end V1 input carries out energy storage, and when described first power end V1 is without input, release electricity is to the energy storage device 30 of described power transfer device 20.
Particularly, described power transfer device 20 has the first input end and the second input that switch input, described first input end is connected with described first power end V1, described second input is connected with described second source end V2, the output of described power transfer device 20 is connected with the input of described power supply change-over device 10, and the output of described power supply change-over device 10 connects the internal memory 100 of television set; Energy storage/the output of described energy storage device 30 is connected with the first input end of described power transfer device 20.
Wherein, the start supply voltage that the standby power voltage that second source end V2 inputs inputs higher than the first power end V1.When power supply of starting shooting inputs, standby power disconnects, and only supplies energy storage device 30 and charges, when power supply of starting shooting disconnects, standby power inputs, maintain television set and be in holding state, in the standby state, internal memory 100 normally works, to preserve data, during start, as long as the master controller (MCU) starting television set can enter picture, realize quick turn-on.
In the present embodiment, described energy storage device 30 comprises the first electric capacity C1, and the first end of described first electric capacity C1 is the energy storage/output of described energy storage device 30, the second end ground connection of described first electric capacity C1.This first electric capacity C1 should select the capacitor of larger capacity, is generally greater than or equal to 10 millifarads, to improve output voltage fluctuation and the instantaneous power-down ability of opposing standby power.Certainly also can select voluntarily according to actual needs, specifically can maintain the duration of internal memory 100 continuous firing as required and arrange.Understandable, when the time needing to maintain internal memory 100 continuous firing is longer, the first electric capacity C1 should select the electric capacity of larger capacity, otherwise, then can corresponding selection compared with the electric capacity of low capacity.
In the present embodiment, described power transfer device 20 comprises the first diode D1 and the second diode D2, the anode of described first diode D1 is the first input end of described power transfer device 20, and the negative electrode of described first diode D1 is connected with the input of described power supply change-over device 10; The anode of described second diode D2 is the second input of described power transfer device 20, and the negative electrode of described second diode D2 is connected with the input of described power supply change-over device 10.Wherein, the first diode D1 and the second diode D2 pours in down a chimney mutually for preventing the power supply of the first power end V1 and second source end V2 input; And the supply voltage inputted due to the first power end V1 and second source end V2 is not identical, when starting shooting power supply input, second diode D2 conducting, first diode D1 ends, by start Power supply, when television set is in holding state, start dump, second source end V2 non-transformer inputs, second diode D2 ends, the first diode D1 conducting, and standby power inputs to power supply change-over device 10, power to after power supply change-over device 10 carries out voltage transitions internal memory 100, make television set be in holding state.
In the present embodiment, the dc-dc U1 that described power supply change-over device 10 can adopt boosting and step-down to be integrated also can be only adopt buck mode DC-DC converter U1, to save cost.
Be understandable that, the standby data protection circuit of the utility model is by arranging the first power end V1 in order to connect standby power, connect the second source end V2 of start power supply, power supply change-over device 10, power transfer device 20 and energy storage device 30, this energy storage device 30 carries out energy storage for the standby power receiving described first power end V1 input, and when described first power end V1 is without input or brownout, automatic release electricity keeps normal work for the internal memory 100 of television set, thus avoid internal memory 100 power down of television set and cause standby failed problem, and, it is simple that the standby data protection circuit of the utility model also has circuit structure, lower-cost advantage.
Based on above-described embodiment, further, with reference to Fig. 1 and Fig. 2, in the present embodiment, described standby data protection circuit also comprises power supply circuits 40, the input of described power supply circuits 40 is connected with described first power end V1, the output of described power supply circuits 40 is connected with the energy storage/output of described energy storage device 30 and the input of described power transfer device 20 respectively, described power supply circuits 40 receive the standby power that the first power end V1 inputs, and the standby power of input is carried out constant current, energy storage device 30 is flowed to after constant voltage, for described energy storage device 30 charging energy-storing.
In the present embodiment, described power supply circuits 40 comprise the first triode Q1, the second triode Q2, the 3rd triode Q3, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4 and the 5th resistance R5.
Wherein, the collector electrode of described first triode Q1 is connected with described first power end V1, the base stage of described first triode Q1 is connected with the collector electrode of the collector electrode of described second triode Q2, the first end of the first resistance R1 and the 3rd triode Q3, and the emitter of described first triode Q1 is connected with the first end of described second resistance R2; Second end of described first resistance R1 is connected with described first power end V1; Second end of described second resistance R2 is connected with the described first end of the first electric capacity C1 and the first input end of described power transfer device 20, the grounded emitter of described second triode Q2; The base stage of described 3rd triode Q3 is connected with the emitter of described first triode Q1, the first end of the second resistance R2 through described 3rd resistance R3, and the emitter of described 3rd triode Q3 is connected with second end of described second resistance R2; The first end of described 4th resistance R4 is connected with the first input end of second end of described second resistance R2, the emitter of the 3rd triode Q3, the energy storage/output of energy storage device 30 and power transfer device 20, and second end of described 4th resistance R4 is connected with the first end of described 5th resistance R5, the base stage of the second triode Q2; The second end ground connection of described 5th resistance R5.
Should be understood that, first triode Q1 and the second triode Q2 forms constant voltage charging circuit, constant voltage is carried out to the standby power of input, first triode Q1 and the 3rd triode Q3 forms constant-current charging circuit, constant current is carried out to the standby power of input, second resistance R2 is current sampling resistor, and the 4th resistance R4 and the 5th resistance R5 forms the final charging voltage that pressure sampling circuit determines the first electric capacity C1.
Be described in detail below in conjunction with Fig. 1, Fig. 2 and the physical circuit principle of television set to the standby data protection circuit of the utility model:
The utility model television set adopts duplicate supply (standby power and start power supply) power supply, and wherein, the first power end V1 connects standby power, and second source end V2 connects start power supply, and the voltage of this start power supply is greater than standby power voltage; Power supply change-over device 10 adopts the DC/DC transducer of voltage-dropping type, and the voltage drop of start power supply and standby power input to be low to moderate the work required voltage of internal memory 100, such as 1.8V, normally works for internal memory 100, thus preserves data.
Under open state, first power end V1 inputs standby power, the power supply of second source end V2 input start simultaneously, now, because start supply voltage is greater than standby power voltage, the first diode D1 ends, the second diode D2 conducting, the start power supply that second source end V2 inputs turns after U1 changes through dc-dc and flows to internal memory 100, and internal memory 100 is by start Power supply; Standby power charges to energy storage device 30 simultaneously.
When needs are standby, turn off start power supply, standby power inputs to DC/DC transducer, and flows to internal memory 100 after the conversion of DC/DC transducer, and internal memory 100 is powered by standby power.If standby power fluctuation is comparatively large or standby power disconnects, now, supply internal memory 100 by energy storage device 30 out-put supply, internal memory 100 is worked on, to preserve data, when standby power connects input again, switch to again standby power and power, so just can ensure, television set is when again starting shooting, do not need to restart internal memory 100 again, decrease the available machine time, and the state before shutdown can be got back to.
The utility model also provides a kind of television set, and this television set comprises above-mentioned standby data protection circuit; The detailed construction of described standby data protection circuit can refer to above-described embodiment, repeats no more herein; Be understandable that; owing to employing above-mentioned standby data protection circuit in a television set, therefore, the embodiment of this television set comprises whole technical schemes of the whole embodiment of above-mentioned standby data protection circuit; and the technique effect reached is also identical, does not repeat them here.
These are only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model specification and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (8)
1. a standby data protection circuit, it is characterized in that, described standby data protection circuit comprises the first power end connecting standby power, connect the second source end of start power supply, power transfer device, power supply change-over device and energy storage device, described power transfer device has the first input end and the second input that switch input, described first input end is connected with described first power end, described second input is connected with described second source end, the output of described power transfer device is connected with the input of described power supply change-over device, the output of described power supply change-over device connects the internal memory of television set, energy storage/the output of described energy storage device is connected with the first input end of described power transfer device, wherein,
Described power transfer device controls described start power supply according to the supply voltage size that the first power end and second source input or described standby power inputs to power supply change-over device; The supply voltage of input is converted to default supply voltage by described power supply change-over device, normally works for internal memory; The standby power that described energy storage device receives described first power end input carries out energy storage, and when described first power end is without input, release electricity is to described power transfer device.
2. standby data protection circuit as claimed in claim 1, is characterized in that, described energy storage device comprises the first electric capacity, and the first end of described first electric capacity is the energy storage/output of described energy storage device, the second end ground connection of described first electric capacity.
3. standby data protection circuit as claimed in claim 2, is characterized in that, the capacitance of described first electric capacity is greater than or equal to 10 millifarads.
4. standby data protection circuit as claimed in claim 1, it is characterized in that, described power transfer device comprises the first diode and the second diode, the anode of described first diode is the first input end of described power transfer device, and the negative electrode of described first diode is connected with the input of described power supply change-over device; The anode of described second diode is the second input of described power transfer device, and the negative electrode of described second diode is connected with the input of described power supply change-over device.
5. standby data protection circuit as claimed in claim 1, is characterized in that, described power supply change-over device is buck mode DC-DC converter.
6. the standby data protection circuit as described in any one of claim 1-5; it is characterized in that; described standby data protection circuit also comprises power supply circuits; the input of described power supply circuits is connected with described first power end; the output of described power supply circuits is connected with the energy storage/output of described energy storage device and the input of described power transfer device respectively; described power supply circuits receive the standby power of the first power end input; and flow to energy storage device after the standby power of input is carried out constant current, constant voltage, for described energy storage device charging energy-storing.
7. standby data protection circuit as claimed in claim 6, it is characterized in that, described power supply circuits comprise the first triode, the second triode, the 3rd triode, the first resistance, the second resistance, the 3rd resistance, the 4th resistance and the 5th resistance, the collector electrode of described first triode is connected with described first power end, the base stage of described first triode is connected with the first end of the collector electrode of described second triode, the first resistance, the collector electrode of the 3rd triode, and the emitter of described first triode is connected with the first end of described second resistance; Second end of described first resistance is connected with described first power end; Second end of described second resistance is connected with the first end of described first electric capacity and the first input end of described power transfer device, the grounded emitter of described second triode; The base stage of described 3rd triode is connected with the emitter of described first triode, the first end of the second resistance through described 3rd resistance, and the emitter of described 3rd triode is connected with the second end of described second resistance; The emitter of the first end of described 4th resistance and the second end of described second resistance, the 3rd triode, the energy storage/output of energy storage device, the first input end of power transfer device are connected, and the second end of described 4th resistance is connected with the described first end of the 5th resistance, the base stage of the second triode; Second end ground connection of described 5th resistance.
8. a television set, is characterized in that, described television set comprises the standby data protection circuit as described in any one of claim 1-7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520081152.9U CN204442521U (en) | 2015-02-03 | 2015-02-03 | Standby data protection circuit and television set |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520081152.9U CN204442521U (en) | 2015-02-03 | 2015-02-03 | Standby data protection circuit and television set |
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| CN204442521U true CN204442521U (en) | 2015-07-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107426619A (en) * | 2017-01-26 | 2017-12-01 | 青岛海信电器股份有限公司 | Intelligent television and its under-voltage protection fault-tolerance approach |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107426619A (en) * | 2017-01-26 | 2017-12-01 | 青岛海信电器股份有限公司 | Intelligent television and its under-voltage protection fault-tolerance approach |
| CN107426619B (en) * | 2017-01-26 | 2019-12-06 | 青岛海信电器股份有限公司 | Intelligent television and undervoltage protection fault-tolerant method thereof |
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