CN107426619A - Intelligent television and its under-voltage protection fault-tolerance approach - Google Patents
Intelligent television and its under-voltage protection fault-tolerance approach Download PDFInfo
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- CN107426619A CN107426619A CN201710432053.4A CN201710432053A CN107426619A CN 107426619 A CN107426619 A CN 107426619A CN 201710432053 A CN201710432053 A CN 201710432053A CN 107426619 A CN107426619 A CN 107426619A
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- 238000013459 approach Methods 0.000 title claims abstract description 7
- 238000001514 detection method Methods 0.000 claims abstract description 39
- 230000005611 electricity Effects 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 4
- 230000000052 comparative effect Effects 0.000 description 30
- 230000007246 mechanism Effects 0.000 description 13
- 101100112673 Rattus norvegicus Ccnd2 gene Proteins 0.000 description 11
- 230000008859 change Effects 0.000 description 7
- 230000002045 lasting effect Effects 0.000 description 6
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- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 238000000151 deposition Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
- H04N21/4436—Power management, e.g. shutting down unused components of the receiver
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/4424—Monitoring of the internal components or processes of the client device, e.g. CPU or memory load, processing speed, timer, counter or percentage of the hard disk space used
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/63—Generation or supply of power specially adapted for television receivers
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Engineering & Computer Science (AREA)
- Software Systems (AREA)
- Power Sources (AREA)
- Television Receiver Circuits (AREA)
Abstract
A kind of intelligent television and its under-voltage protection fault-tolerance approach, the intelligent television include：Power supply, by the primary processor of supply power supply power supply, storage device and system is resetted, and voltage detecting circuit, whether the supply voltage for detecting the storage device, which reduces and trigger, controls the storage device to be stopped；Also include：Voltage comparison unit, it includes voltage order one comparison circuit, for supply voltage compared with setting voltage threshold, is judged the supply voltage whether be increased to triggering control the storage device be stopped between voltage, and corresponding provide the first trigger signal；And decision package, at least trigger signal provided for the detection signal provided according to the voltage detecting circuit and the voltage comparison unit, to decide whether to control the storage device to rework.The present invention can independently recover, so as to improve Consumer's Experience after power down protection pattern is entered.
Description
Technical field
The present invention relates to intelligent television, more particularly to a kind of intelligent television with EMMC.
Background technology
The development of intelligent television at present, all there is EMMC (Embedded Multi Media in many intelligent televisions
Card, embedded multi-media card), EMMC is used for storing the program code and other data of the host CPU operation of intelligent television,
Data in EMMC are most important for the normal operation of intelligent television, and therefore, many intelligent televisions employ power down to EMMC
Protection mechanism, when there is power down in intelligent television, control EMMC be stopped, will not be altered with the data ensured in EMMC or
Person damages.
As shown in figure 1, be the EMMC power down protection block diagrams of prior art, including power supply, motherboard power supply converting system,
Detect circuit, memory system, SOC (on-chip system), EMMC systems and RESET systems (reset system).
Fig. 2 is a kind of block diagram of Fig. 1 power supply, including current rectifying and wave filtering circuit, pfc circuit, LLC resonance circuits,
One transformer, the first feedback circuit, circuit of reversed excitation, the second transformer, the second feedback circuit.
As shown in figure 3, being a kind of existing detection circuit applied to EMMC under-voltage protection mechanism, 12V voltages pass through resistance
R104, R113 and R123 are grounded, and detection signal Power_Detect is the detection signal of SOC host CPU, and the detection signal is
The voltage at resistance R123 both ends, the level of detection signal is 1V during power supply normal power supply.Because electric capacity be present in power panel and mainboard,
When alternating current 220V powers off, the 12V of output can't be reduced immediately, but gradually be reduced, when 12V is power-down to 10V, detection letter
Number Power_Detect drops to 0.8V from 1V, i.e., can trigger the power down protection to EMMC.
Power down protection can trigger before SOC host CPUs are stopped, and now host CPU still can maintain a period of time just
Often work, during this section, host CPU can preserve to the data in EMMC, and control EMMC to be stopped, to ensure EMMC
In data will not be altered or damage.
If the alternating current of input continues to reduce, intelligent television shutdown, SOC CPU is stopped；If simply moment
Power down, AC power is recovered normally again before CPU is stopped, then intelligent television is now reconciled still in power down protection state
The hardware circuits such as device, Video Decoder, audio D/A converter still can work, that is to say, that can be drawn with normal play video
Face and sound, but input equipment, for example, button, remote control then cannot respond to, show as deadlock state because, host CPU need from
EMMC is read after next needing code to be run and related data, could perform associative operation, such as read input equipment
Information is inputted, EMMC, which is stopped, will cause CPU can not also continue to run with.
As shown in figure 4, be the partial block diagram of typical intelligent television, including host CPU, demodulator, Video Decoder, audio
D/A converter, input equipment and EMMC.During normal work, host CPU is used for the dependent instruction inputted according to input equipment, to solution
Device, Video Decoder and audio D/A converter is adjusted to be controlled, when demodulator, Video Decoder and audio D/A converter work
Afterwards, it is not necessary to which obtaining the instruction of host CPU again can work, therefore now whether CPU runs and do not influence the normal of these hardware
Operation.
It can be seen that existing intelligent television is normal mode for the EMMC power down protection patterns taken, do not consider certainly
The situation of main recovery.After power supply power-fail triggering, system enters guard mode, just independently can not be resetted and be opened
It is dynamic；In addition, in the case of user's artificial fast operating, it also can contingently enter guard mode；Especially family's power down and idol
Voltage Drop caused by sending out surge.These bring harmful effect to Consumer's Experience.
The content of the invention
The technical problem to be solved in the present invention is to overcome above-mentioned the shortcomings of the prior art, and proposes a kind of intelligence electricity
Depending on after power down protection pattern is entered, can independently recover, so as to improve Consumer's Experience.
The technical scheme that the present invention proposes for above-mentioned technical problem includes, and proposes a kind of intelligent television, including：Power supply
Power supply, by the primary processor of supply power supply power supply, storage device and system is resetted, and voltage detecting circuit, for detecting
Whether the supply voltage of the storage device, which reduces and trigger, controls the storage device to be stopped；Also include：Voltage comparison unit,
It includes voltage order one comparison circuit, for supply voltage compared with setting voltage threshold, to be judged into the supply voltage is
It is no be increased to triggering control the storage device be stopped between voltage, and corresponding provide the first trigger signal；And decision-making
Unit, at least one triggering letter provided for the detection signal provided according to the voltage detecting circuit and the voltage comparison unit
Number, to decide whether to control the storage device to rework.
The technical scheme that the present invention proposes for above-mentioned technical problem also includes, and proposes a kind of under-voltage guarantor of intelligent television
Fault-tolerance approach is protected, is engaged using voltage detecting circuit, voltage comparison unit and decision package；Wherein, the voltage detecting circuit
Whether the supply voltage of the storage device for detecting the intelligent television, which reduces and trigger, controls the storage device to be stopped；Should
Voltage comparison unit includes voltage order one comparison circuit, for compared with setting voltage threshold, judging to be somebody's turn to do supply voltage
Supply voltage whether be increased to triggering control the storage device be stopped between voltage, and corresponding provide the first triggering letter
Number；The decision package, for the detection signal that provides according to the step of the supply voltage of detection storage device and the voltage ratio compared with
At least trigger signal that unit provides, to decide whether to control the storage device to rework.
Compared with prior art, the present invention matches by using voltage detecting circuit, voltage comparison unit and decision package
Close, judge whether supply voltage reduces and trigger control storage device and be stopped, and judge to control storage device in triggering
After being stopped, whether supply voltage is increased to the voltage before the triggering control storage device is stopped, if so, then
Control the storage device to rework, after power down protection pattern is entered, can independently recover, so as to improve user's body
Test.
Brief description of the drawings
The system that Fig. 1 illustrates a kind of existing intelligent television under-voltage protection EMMC.
Fig. 2 illustrates a kind of power-supply system of existing intelligent television.
Fig. 3 illustrates a kind of detection circuit of the EMMC supply voltages of existing intelligent television.
The system that Fig. 4 illustrates a kind of existing intelligent television.
The system that Fig. 5 illustrates intelligent television first embodiment of the present invention.
Fig. 6 illustrates autonomous restoration methods used by first embodiment.
Fig. 7 illustrates voltage comparator circuit used by first embodiment.
Fig. 8 illustrates the under-voltage situation of the supply voltage that first embodiment is faced.
Fig. 9 illustrates that the situation of disturbing pulse occurs in supply voltage under the normal shutdown that first embodiment is faced.
Figure 10 illustrates a kind of current comparison circuit used by first embodiment.
Figure 11 illustrates the current detecting part of another current comparison circuit used by first embodiment.
Figure 12 illustrates the voltage rating unit of another current comparison circuit used by first embodiment.
Figure 13 illustrates decision circuit used by first embodiment.
Figure 14 illustrates a kind of SOC and storage device used by first embodiment.
Figure 15 illustrates decision-making electrical level and the clock circuit and IO in storage device controller used by first embodiment
The matching relationship of interface circuit.
Figure 16 illustrates another SOC and storage device used by first embodiment.
Figure 17 illustrates the operation principle of the autonomous protection mechanism for recovering function of the tool of first embodiment.
The system that Figure 18 illustrates intelligent television second embodiment of the present invention.
Figure 19 illustrates a kind of voltage order one comparison circuit used by second embodiment.
Figure 20 illustrates another voltage order one comparison circuit used by second embodiment.
Figure 21 illustrates the voltage order one comparison circuit of another used by second embodiment.
Figure 22 illustrates the voltage order one comparison circuit of another used by second embodiment.
Figure 23 illustrates secondary voltage comparison circuit used by second embodiment.
Figure 24 illustrates decision circuit used by second embodiment.
Figure 25 illustrates the operation principle of the autonomous protection mechanism for recovering function of the tool of second embodiment.
Wherein, Main Reference Numerals are described as follows：100a, the voltage ratio of 100 intelligent television, 101 power supply 102 compared with
103 electric currents compare the storage device 108RESET systems 109 of 104 motherboard power supply converting system, 105 internal memory 106SOC 107 and examined
The decision circuit 102a voltage order ones of slowdown monitoring circuit 110 compare 103a secondary voltages and compared.
Embodiment
Below in conjunction with accompanying drawing, give the present invention further elaboration.
Referring to Fig. 5, system that Fig. 5 illustrates intelligent television first embodiment of the present invention.The present invention proposes a kind of intelligence electricity
Depending on 100, it includes：Power supply 101, voltage ratio is compared with 102, and electric current compares 103, motherboard power supply converting system 104, internal memory 105,
SOC106, storage device 107, RESET (reset system) 108, detect circuit 109 and decision circuit 110.
Power supply 101 provides 12V supplies.Voltage ratio is monitored compared with the 12V that 102 pairs of power supplies 101 provide.Electric current
The electric current supply for comparing the 12V that 103 pairs of power supplies 101 provide is monitored.Motherboard power supply converting system 104 is by power supply
Various voltages supply needed for the 101 12V conversion mainboard normal works provided, so as to internal memory 105, SOC106 on mainboard, deposit
Store up equipment 107 and RESET systems 108 being capable of normal work.Detecting circuit 109, whether power down is monitored to power supply 101,
And detection signal is supplied to SOC106 in time.Signal VD, the electric current that decision circuit 110 provides according to voltage ratio compared with 102 compare
The detection signal that the 103 signal Vef provided and detection circuit 109 provide, generates decision-making electrical level, and then control RESET systems
108 action.
Referring to Fig. 6, Fig. 6 illustrates autonomous restoration methods used by first embodiment.The present invention proposes a kind of intelligence electricity
Depending on the autonomous method for recovering storage device work, comprise the following steps.
S100, the supply voltage for detecting storage device.
Storage device designated herein can be EMMC, Flash flash memory etc..
Supply voltage designated herein, can be the voltage or the voltage of the power input port of storage device
Preceding step voltage.Illustrated below in conjunction with Fig. 2, Fig. 3 and Fig. 5.The voltage of storage device EMMC power input port is main
The voltage of plate power conversion system output, and EMMC supply voltage can be the voltage of motherboard power supply converting system output；
Can also be motherboard power supply converting system output voltage preceding step voltage, that is, power supply output 12V；It can also be
The output voltage of circuit of reversed excitation, pfc circuit or current rectifying and wave filtering circuit.
It is noted that detection signal Power_Detect be although by resistance R123, R113, R104, R105 and
The circuit that R118 is formed obtains, because supply voltage 12V change can cause detection signal Power_Detect change, because
This, it is possible to understand that：It is substantially also the detection to supply voltage to obtain detection signal Power_Detect.
S110, judge whether the supply voltage reduces and trigger the control storage device and be stopped, and judge
After triggering controls the storage device to be stopped, whether the supply voltage is increased to triggering and controls the storage device
Voltage before being stopped, if so, then controlling the storage device to rework.
After storage device is reworked, host CPU can from storage device program code read and related data, so as to
It can continue to run with.
Referring to Fig. 3, during supply voltage 12V is reduced to 10V, detection signal Power_Detect drops to from 1V
0.8V, then trigger the control storage device and be stopped.
In order to judge after triggering controls the storage device to be stopped, whether the supply voltage, which is increased to, is triggered
Control the storage device be stopped before voltage, referring to Fig. 5, in the present embodiment, add voltage ratio compared with 102.Examine
Consider：Only there is above-mentioned voltage ratio compared with (circuit) 102, misrecognition is being likely to occur in some cases, in order to further confirm that
Whether supply voltage recovers to voltage during normal work, also add electric current and compares 103.
Referring to Fig. 7, Fig. 7 illustrates voltage comparator circuit used by first embodiment.Specifically, it may be determined that power supply
Sizes of the voltage Vin1 in normal work：With reference to supply voltage Vref1 (such as 12V), supply voltage Vin1 and reference are supplied
Piezoelectric voltage Vref1 as voltage comparator (or other voltage comparator circuits of such as OVP under-voltage protecting circuits etc) two
Individual input, output voltage comparative result VD.When supply voltage Vin1, which is more than, refers to supply voltage Vref1, a voltage ratio is exported
Compared with result VD；When supply voltage Vin1, which is less than, refers to supply voltage Vref1, another voltage comparative result VD is exported.
After triggering controls the storage device to be stopped, supply voltage is referred to when supply voltage Vin1 is more than
Vref1, then show that supply voltage recovers rise, can be determined according to voltage comparative result VD；When supply voltage Vin1 still less than
With reference to supply voltage Vref1, then show supply voltage complete power down (such as 0V), can also be according to voltage comparative result VD
It is determined that.
Referring to Fig. 8, Fig. 8 illustrates the under-voltage situation of the supply voltage that first embodiment is faced.At the T1 moment, power supply electricity
There is moment decline in pressure Vin, and decreases below rotection thresholds (setting voltage threshold) V1, therefore, at the T1 moment, supply voltage
Vin decline triggers the control storage device and is stopped.Now, although Vin1 is again smaller than Vref1, due to voltage
Comparator is rising edge triggering, and therefore, only when T2 moment supply voltages recover to Vref1, voltage comparator could be defeated
Go out voltage comparative result VD, judge that supply voltage Vin1 recovers to control the storage device to triggering according to comparative result VD
Voltage before being stopped.Therefore, after the T1 moment before the T2 moment, voltage comparator will not export Vin1 and be less than
Vref1 comparative result.
Referring to Fig. 9, Fig. 9 illustrates that the feelings of disturbing pulse occurs in supply voltage under the normal shutdown that first embodiment is faced
Shape.For example, user to intelligent television normal shutdown (refer to shut down using modes such as the switches on remote control or intelligent television,
Except directly cut off the electricity supply (such as pull out plug, shut-off master on off) in addition to mode) when, host CPU can initially enter holding state
T3, now host CPU not yet power down, if now an interference rising pulses T4 occurs in power supply again, that is to say, that now power supply electricity
Pressure is to meet to fall before, and then the situation risen occurs again, and according to the method for preceding embodiment, now storage device can be controlled
System restarts work, and host CPU this fashion be in holding state, therefore host CPU reads the data of storage device again, weighs
New work, user can be caused to shut down and failed, so as to influence Consumer's Experience.
Referring to Fig. 5, electric current compares whether 103 associated currents for being used to detect storage device continue, if then showing user
It is in the action booted up, if otherwise showing, user is in the action shut down.
Here associated current refers to that the electric current of circuit system optional position, associated current reflect where storage device
The running status of machine where storage device, such as：Associated current is not zero during operation, and associated current can be that motherboard power supply turns
Change electric current or circuit of reversed excitation, the electric current of pfc circuit or current rectifying and wave filtering circuit of system.
Electric current, which compares 103, when detecting that electric current is lasting, then to export an electric current with output current comparative result Vef
Comparative result Vef, according to electric current comparative result Vef may determine that electric current be it is lasting, when detect electric current be it is not lasting,
Another electric current comparative result Vef is then exported, may determine that electric current is not lasting according to electric current comparative result Vef.
Referring to Figure 10, Figure 10 illustrates a kind of current comparison circuit used by first embodiment.The electric current compares (electricity
Road) 103 a voltage comparator and a sampling capacitance are employed to realize.Reference voltage V ref2 (this can be set
Reference voltage can change), if electric current I1 continues, sampling capacitance C1 voltage Vin2 can increase, by a timing
Between after, electric current comparative result Vef can be with the size between reflecting voltage Vin2 and reference voltage V ref2.If voltage Vin2 is more than
Reference voltage V ref2, then it is lasting to illustrate electric current I.
In other embodiment, there is the accumulator of electric capacity for some, upon power-up, accumulator externally supplies
The electric current answered is to reduce；When shutdown, the electric current that accumulator is externally supplied is then increased.Therefore, it is this kind of by detecting
The growth of external (such as sampling load) the supply size of current of accumulator, equally may determine that user is to shut down or opening
Machine.
Referring to Figure 11 and Figure 12, Figure 11 illustrates the electric current inspection of another current comparison circuit used by first embodiment
Survey part.Figure 12 illustrates the voltage rating unit of another current comparison circuit used by first embodiment.Accumulator
In storage capacitor C2 and sampling resistor Rs form electric current capture, wherein electric current I2 represents the electric current that accumulator is externally supplied,
Flow through sampling resistor Rs electric current.A reference voltage V ref3 (this reference voltage can change) can be set, if
Electric current I2 continues, then sampling capacitance C1 voltage Vin3 can then increase, and after some period of time, electric current comparative result Vef can
With the size between reflecting voltage Vin3 and reference voltage V ref3.If voltage Vin3 is more than reference voltage V ref3, illustrate electricity
Stream I2 is to increase, conversely, then illustrating that electric current I2 does not increase.
Referring to Figure 13, Figure 13 illustrates decision circuit used by first embodiment.Decision circuit 110 is real with door using one
It is existing, decision-making electrical level can be obtained according to detection signal Power_Detect, voltage comparative result VD and electric current comparative result Vef.
The logical table of decision circuit 110 is as follows.
| Power_Detect | VD | Vef | Decision-making electrical level |
| 1 | 1 | 1 | 0 |
| 0 | 0 | 0 | 0 |
| 0 | 1 | 1 | 1 |
The logic of decision-making electrical level and detection signal Power_Detect, voltage comparative result VD and electric current comparative result Vef
Relational expression is：Decision-making electrical level=(/Power_Detect) and (VD) and (Vef).
With reference to referring to Fig. 3, during normal work, detection signal Power_Detect is high level 1；When ripple occurs in supply voltage
It is dynamic when dropping to triggering and controlling the storage device to be stopped；Detection signal Power_Detect is low level 0；When power supply electricity
When pressure is down to 0V completely, detection signal Power_Detect is also low level 0.
With reference to referring to Fig. 5 and Fig. 7, when working properly, voltage comparative result VD is high level 1；Described in triggering control
After storage device is stopped, supply voltage Vref1 is referred to when supply voltage Vin1 is more than, voltage comparative result VD is high electricity
Flat 1；After triggering controls the storage device to be stopped, when supply voltage Vin1 is still less than referring to supply voltage Vref1,
Voltage comparative result VD is low level 0.
With reference to referring to Fig. 5 and Figure 10 to Figure 12, when working properly, or it is lasting that supply voltage, which declines still electric current,
In the case of, electric current comparative result Vef is high level 1, and when supply voltage is stopped power supply completely, electric current comparative result Vef is low electricity
Flat 0.
Referring to upper table, when detection signal Power_Detect, voltage comparative result VD and electric current comparative result Vef are high
During level 1, show the normal power supply of storage device, therefore the storage device need not be controlled to be stopped, such as：Decision-making electricity
Put down as low level 0；When detection signal Power_Detect, voltage comparative result VD and electric current comparative result Iref are low levels
When 0, show that the supply voltage of storage device is down to 0, i.e., do not power, therefore stop work also without the control storage device
Make, such as：Decision-making electrical level is low level 0；When detection signal Power_Detect is low level 0, voltage comparative result VD and electricity
Flow comparative result Vef when being high level 1, show that supply voltage after fluctuation declines, recovers again, now storage device by
In in stop working state, it is therefore desirable to control the storage device to rework, such as：Decision-making electrical level is high level 1.
After decision-making electrical level is obtained, can be realized according to decision-making electrical level to whether needing to control storage device work again
Make.Control storage device is reworked and has a variety of methods.
Referring to Figure 14, Figure 14 illustrates a kind of SOC and storage device used by first embodiment.In one approach,
Can be by controlling storage device controller work with not working, to control storage device work with not working.Wherein, SOC bags
Host CPU and the first storage device controller are included, storage device includes the second storage device controller and storage medium.
In storage device, storage medium stores the program code of host CPU operation, and related data.Clock circuit
For providing the clock signal required for operation for storage device controller.I/O interface circuitry is used to provide main second storage device
The data-interface that controller communicates with the first storage device controller, and the second storage device controller with storage medium it
Between data-interface.Processor is then used to be controlled clock circuit and I/O interface circuitry.First storage device controller with
The structure of second storage device controller is identical.
SOC is in communication with each other by the first storage device controller of itself with the second storage device controller.When SOC is to depositing
When storing up equipment data storage, the first storage device controller sends the data to the second storage device controller, and the second storage is set
Preparation controller is by the data Cun Chudao storage mediums received；When SOC reads data from storage device, the second storage device control
Device processed reads data from storage medium, then sends the data to the first storage device controller.
It is understood that storage device controller is the passage that SOC reads and writes data to storage device, therefore, work as needs
Control the storage device to be stopped, the first storage device controller can be controlled to be stopped and (in other words, close first to deposit
Store up device controller), when the second storage device controller of storage device is not received from the first storage device controller
Signal, naturally also it is stopped.
And control the first storage device controller to be stopped also and have various ways, for example, host CPU is to the first storage device
The processor of controller sends the order for closing clock circuit, and so, the first storage device controller is then stopped, due to not having
There is clock signal caused by clock circuit, the processor of the first storage device controller will also close, hereafter, the first storage device
Controller can not receive order from host CPU again, unless after being resetted to the first storage device controller, the first storage device
Controller can just rework；Or order of the host CPU to the first storage device controller transmission closing I/O interface circuitry, first
Storage device controller also can not receive order from host CPU again, also send data without the storage device controller of normal direction second, unless
After being resetted to the first storage device controller, the first storage device controller can just rework.
Referring to Figure 15, Figure 15 illustrates decision-making electrical level and the clock in storage device controller used by first embodiment
The matching relationship of circuit and I/O interface circuitry.In one approach, decision-making electrical level and the clock circuit in storage device controller
With the connection diagram of I/O interface circuitry.Wherein, Reset represents the reseting port of clock circuit and I/O interface circuitry, high level
Effectively.When decision-making electrical level is high level, clock circuit and I/O interface circuitry reset, and start working again, i.e. storage device
Controller and storage device restart work.
Control storage device is reworked and can also have following methods：Shutdown command is sent to storage device, storage device
Receive and storage device closed to after shutdown command (when storage device needs to rework, decision-making electrical level can be used for depositing
Storage equipment is resetted), for example, sending shutdown command closes the clock circuit of storage device, I/O interface circuitry etc..
Referring to Figure 16, Figure 16 illustrates another SOC and storage device used by first embodiment.SOC includes host CPU
With the first EMMC controllers (EMMC Controller), EMMC includes the 2nd EMMC controllers and storage medium.SOC and EMMC
Data interaction may be referred to be previously with regard to Figure 14 explanation.
Specifically, decision-making electrical level can be used for resetting the first storage device controller.Such as：Decision-making electrical level with
The reset circuit connection of first storage device controller.When decision-making electrical level is low level 0, reset circuit does not work, and works as decision-making
When level is high level 1, reset circuit work, the first storage device controller is reset, and re-powers work.In the present embodiment
In, by hard-wired decision circuit 110 to obtain decision-making electrical level, and the control of the first storage device is controlled according to decision-making electrical level
Device resets, more fast and reliable so as to control storage device to rework.In other embodiments, above-mentioned decision circuit 110
The logic of realization both can be by the software realization run on host CPU, can also be by the first storage device controller
The software realization run on processor, such as：The processor obtains detection signal Power_Detect, as detection signal Power_
When Detect is low level, then storage device is controlled to be stopped, for example, turning off the clock circuit or I/O interface circuitry of itself
Deng.
Referring to Figure 17, Figure 17 illustrates the operation principle of the autonomous protection mechanism for recovering function of the tool of first embodiment.Can
With understanding, 220V supply networks 501,12V supply networks 502, DETECT networks 503, DETECT signals 504, SOC detections
505, EMMC guard bits judge that 506, EMMC protections, 507 and EMMC non-protected 508 belongs to the reality of existing EMMC power down mechanism
Existing key element.Wherein, for voltage ratio compared with 511, VD trigger signals 512, electric current compares 513, Vef trigger signals 514, spontaneous decision system
Judge that 515, RESET triggers 516 and RESET and do not trigger 517 realizations for belonging to the newly-increased under-voltage protection fault tolerant mechanism of the present invention
Key element.
It is noted that referring to Fig. 5, voltage ratio compared with 102 and electric current compare 103 can uniformly be understood as a voltage ratio compared with
Unit, after controlling the storage device to be stopped in triggering, judge whether the supply voltage is increased to triggering control and is somebody's turn to do
Storage device be stopped between voltage.In addition, the logical operation that above-mentioned decision circuit 110 is realized, can change by main
The program realization run on reason device, therefore can be by the mechanism that realizes of this logical operation, collectively referred to as decision package.
The intelligent television 100 of the present invention, on the one hand can realize EMMC power down protections, be realized in technical standpoint controllable；
On the other hand the surge detection of power supply is realized by introducing the under-voltage manner of comparison of power-supply system, and enter according to surge detection
The anticipation of row power utilization environment, further, detected by introducing increase in current, to detect user behavior, so as to relatively reliable
The anticipation of user view is realized on ground, in conjunction with the result of anticipation come realize system reset start, can efficiently against due to
EMMC carry out power down protection and can not spontaneous startup the problem of, substantially improve Consumer's Experience.
Referring to Figure 18, system that Figure 18 illustrates intelligent television second embodiment of the present invention.The present invention proposes a kind of intelligence
TV 100a, it includes：Power supply 101, voltage order one compare 102a, and secondary voltage compares 103a, motherboard power supply conversion system
System 104, internal memory 105, SOC106, storage device 107, RESET (reset system) 108, detect circuit 109 and decision circuit 110.
Compared with the intelligent television 100 of aforementioned first embodiment, the difference of the two is mainly reflected in：By the voltage ratio of two-stage compared with
102a, 103a combination come substitute voltage order one compare 102 compared with one-level electric current 103 combination.It is, pass through two-stage
Voltage ratio detects whether supply network recovers compared with 102a, 103a, and provides user and be intended to direct power down shutdown or user
Trigger signal needed for the unstable anticipation of power utilization environment.
Referring to Figure 19 to Figure 22, Figure 19 illustrates a kind of voltage order one comparison circuit used by second embodiment.Figure
20 illustrate another voltage order one comparison circuit used by second embodiment.Figure 19 and Figure 20 shows two kinds of simple ratios
Compared with the situation of device circuit.Simple comparator is the voltage V1 and threshold voltage Vref that compare input size, is judged by size
The low and high level of output, as the trigger signal VD1 subsequently judged.The same phase and anti-phase two kinds of shapes that Figure 19 and Figure 20 is shown respectively
Formula.
Referring to Figure 21, Figure 21 illustrates the voltage order one comparison circuit of another used by second embodiment.Figure 21 shows
A kind of situation of hysteresis comparator is gone out.Compared with simple comparator, the structure of simple comparator is simple, high sensitivity, still
Antijamming capability is poor, if the voltage V1 inputted if continuous saltus step, can cause output electricity near threshold voltage Vref
Pressure VD1 is fluctuated back and forth between low and high level, and hysteresis comparator can preferably solve this anti-interference problem.
Referring to Figure 22, Figure 22 illustrates the voltage order one comparison circuit of another used by second embodiment.Figure 22 shows
A kind of situation of double-limit comparator is gone out.That is, can be by different from two the voltage V of input threshold voltage Va and Vb
Compare, to obtain comparative result VD1.
It is noted that although four kinds of above-mentioned modes can apply to the realization that voltage order one compares 102a, consider
To only with a threshold voltage with regard to design requirement can be met, it is not necessary that from double-limit comparator；In view of general home-use
Continuous fluctuation seldom occurs in electrical environment, voltage, from having little significance for hysteresis comparator；In view of the mode of simple comparator
Cost is low, efficiency high, therefore voltage order one is compared 102a realization and realized from the mode of simple comparator, this structure,
Structure is consistent with the realizing compared with 102 of the voltage ratio in aforementioned first embodiment.
Referring to Figure 23, Figure 23 illustrates secondary voltage comparison circuit used by second embodiment.Figure 23 shows one kind
The situation of under-voltage protecting circuit, its concrete principle are about：When input voltage V1 is normal value (generally 12V), signal VD1
Electric work, the controlled switch closure of relay, letter are obtained for high level, voltage-stabiliser tube ZD breakdown, triode ON, the coil of relay
Number VD2 is also high level, and whole system is normal work；When input voltage V1 is less than threshold voltage (generally 10V), letter
Number VD1 is changed into low level, voltage-stabiliser tube ZD cut-offs, triode cut-off, and the coil losing electricity of relay is not worked, and the controlled of relay is opened
Shut-off is opened, and signal VD2 is low level, and whole system is idle.
Referring to Figure 24, Figure 24 illustrates decision circuit used by second embodiment.With determining in aforementioned first embodiment
Plan circuit is compared, and the two is consistent, the logic for drawing decision-making electrical level be it is the same, only need to be simply with two trigger signals
VD1, VD2 accordingly substitute two foregoing trigger signals VD, Vef.It will not be repeated here.
Referring to Figure 25, Figure 25 illustrates the operation principle of the autonomous protection mechanism for recovering function of the tool of second embodiment.Can
With understanding, 220V supply networks 501,12V supply networks 502, DETECT networks 503, DETECT signals 504, SOC detections
505, EMMC guard bits judge that 506, EMMC protections, 507 and EMMC non-protected 508 belongs to the reality of existing EMMC power down mechanism
Existing key element.Wherein, voltage order one comparing cell 511a, VD1 trigger signal 512a, secondary voltage comparing cell 513a, VD2 triggering
Signal 514a, spontaneous decision system judge that 515, RESET triggerings, 516 and RESET does not trigger 517 and belongs to of the invention newly-increased owe
Pressure protection fault tolerant mechanism realizes key element.
Compared with the situation of the first embodiment shown in earlier figures 17, simply voltage order one comparing cell 511a, VD1 are triggered
Signal 512a, this four elements of secondary voltage comparing cell 513a and VD2 trigger signal 514a are different.Specifically,
Consider：The two key elements of voltage order one comparing cell 511a and VD1 trigger signal 512a, with foregoing voltage ratio compared with 511 and
The two key elements of VD trigger signals 512 are actually consistent.Therefore, second embodiment is compared with first embodiment, difference
It is only limitted to：The two key elements of secondary voltage comparing cell 513a and VD2 trigger signal 514a, 513 and Vef is triggered compared with electric current
The difference of the two key elements of signal 514.
Return ginseng Figure 18 and Fig. 5, it is to be appreciated that：Compared with first embodiment, the difference of the two is second embodiment：
Compare 103a with secondary voltage and instead of electric current and compare 103.It is noted that in a second embodiment, decision-making electrical level both carried
RESET systems 108 are supplied, are also provided to power supply 101, this is allowed for：Decision-making electrical level is asked for solving under-voltage protection
Topic, and under-voltage protection mechanism can both have been realized on mainboard, can also be realized on supply power supply 101.By by decision-making electrical level
Fed back to 101 liang of RESET systems 108 and power supply, be capable of the flexible realization of convenient under-voltage protection mechanism.Equally, it is right
In the situation of the first embodiment shown in Fig. 5, decision-making electrical level can also guide supply power supply 101 into according to the needs of practical application.
It is noted that referring to Figure 18, voltage order one compares 102a and secondary voltage compares 103a and can unify to understand
Into a voltage comparison unit, after controlling the storage device to be stopped in triggering, judge whether the supply voltage raises
To triggering control the storage device be stopped between voltage.In addition, being similar to first embodiment, the institute of decision circuit 110 is real
Existing logical operation, it can change and be realized by the program run on primary processor, therefore this logical operation can be realized machine
Structure, collectively referred to as decision package.
The intelligent television 100a of the present invention, on the one hand can realize EMMC power down protections, be realized in technical standpoint controllable；
On the other hand by introduce two-stage power-supply system under-voltage manner of comparison to realize the surge detection of power supply, and examined according to fluctuation
Survey to carry out the anticipation of power utilization environment, so as to relatively reliable realize the anticipation of user view, come in conjunction with the result of anticipation
Realize system reset start, can efficiently against due to EMMC carry out power down protection and can not spontaneous startup the problem of, significantly
Improve Consumer's Experience.
It is noted that in the above-described embodiments, the intelligent television 100 has voltage order one comparison circuit 102 and one
Level current comparison circuit 103, intelligent television 100a have voltage order one comparison circuit 102a and secondary voltage comparison circuit
103a；In further embodiments, voltage order one can only be retained according to the needs of practical application, the intelligent television 100,100a
Comparison circuit 102,102a, and the secondary voltage comparison circuit 103a of one-level current comparison circuit 103/ is saved.In addition, according to reality
The needs of border application, the intelligent television 100,100a can be the product or power switch without power switch
Product.
The above, only presently preferred embodiments of the present invention, are not intended to limit embodiment of the present invention, and this area is general
Lead to central scope and spirit of the technical staff according to the present invention, can very easily carry out corresponding flexible or modification, therefore originally
The protection domain of invention should be defined by the protection domain required by claims.
Claims (10)
1. a kind of intelligent television, including：Power supply, by the primary processor of supply power supply power supply, storage device and reset system
System, and voltage detecting circuit, whether the supply voltage for detecting the storage device, which reduces and trigger, controls the storage device
It is stopped；Characterized in that, also include：Voltage comparison unit, it includes voltage order one comparison circuit, for by supply voltage
Compared with setting voltage threshold, judge whether the supply voltage is increased to triggering and controls between the storage device is stopped
Voltage, and corresponding provide the first trigger signal；And decision package, for the detection letter provided according to the voltage detecting circuit
Number and the voltage comparison unit provide an at least trigger signal, to decide whether to control the storage device to rework.
2. according to the intelligent television described in claim 1, it is characterised in that the voltage comparison unit also includes：One-level electric current ratio
Compared with circuit, for detecting the associated current of the storage device, and judge whether the associated current continues, and correspond to and provide second
Trigger signal.
3. according to the intelligent television described in claim 2, it is characterised in that the current comparison circuit includes current detecting part,
For the associated current detected to be converted into voltage signal；And voltage rating unit, for current detecting part to be provided
Voltage signal compared with setting voltage threshold, obtain second trigger signal.
4. according to the intelligent television described in claim 1, it is characterised in that the voltage comparison unit also includes：Secondary voltage ratio
Compared with circuit, for supply voltage compared with setting voltage threshold, to be judged to, whether the supply voltage is increased to trigger control
The storage device be stopped between voltage, and corresponding provide the second trigger signal.
5. according to the intelligent television described in claim 4, it is characterised in that the voltage order one comparison circuit mainly by voltage ratio compared with
Device is formed, and the secondary voltage comparison circuit is mainly made up of voltage-stabiliser tube, triode and relay, wherein, the negative pole of the voltage-stabiliser tube
It is connected with first trigger signal.
6. according to the intelligent television described in claim 1, it is characterised in that the detection signal and the trigger signal are level letter
Number；The decision package carries out logical operation to the detection signal and the trigger signal, and provides decision-making electrical level, is given to power supply electricity
Source and/or the reset system.
7. according to the intelligent television described in claim 6, it is characterised in that the decision package is realized by logic circuit；Or should
Decision package is realized by the program run on the primary processor.
8. according to the intelligent television described in any one of claim 1 to 7, it is characterised in that the storage device is embedded more matchmakers
Body card；The intelligent television includes on-chip system, and the primary processor is located at the on-chip system.
9. the under-voltage protection fault-tolerance approach of a kind of intelligent television, it is characterised in that using voltage detecting circuit, voltage comparison unit
It is engaged with decision package；Wherein, the supply voltage for the storage device that the voltage detecting circuit is used to detect the intelligent television is
It is no reduce and trigger control the storage device be stopped；The voltage comparison unit includes voltage order one comparison circuit, for inciting somebody to action
Supply voltage judges whether the supply voltage is increased to triggering and controls the storage device to stop compared with setting voltage threshold
Voltage between work, and correspond to and the first trigger signal is provided；The decision package, for the power supply electricity according to detection storage device
At least trigger signal that the detection signal and the voltage comparison unit that the step of pressure provides provide, to decide whether to control this to deposit
Storage equipment is reworked.
10. according to the method described in claim 9, it is characterised in that the voltage comparison unit also includes：One-level electric current is more electric
Road, for detecting the associated current of the storage device, and judge whether the associated current continues, and correspond to and the second triggering is provided
Signal；Or the voltage comparison unit includes：Another voltage comparator circuit, for supply voltage and setting voltage threshold to be entered
Row compares, judge the supply voltage whether be increased to triggering control the storage device be stopped between voltage, and corresponding carry
For the second trigger signal.
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| CN201710431934.4A Active CN107197380B (en) | 2017-01-26 | 2017-06-09 | Intelligent television and undervoltage protection fault-tolerant method thereof |
| CN201710432051.5A Active CN107426618B (en) | 2017-01-26 | 2017-06-09 | Smart television and its under-voltage protection fault-tolerance approach |
| CN201710432053.4A Active CN107426619B (en) | 2017-01-26 | 2017-06-09 | Intelligent television and undervoltage protection fault-tolerant method thereof |
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| CN110780208A (en) * | 2018-07-25 | 2020-02-11 | 李尔公司 | Apparatus and method for monitoring battery and storing data based on battery status |
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| CN108270200A (en) * | 2018-01-18 | 2018-07-10 | 深圳创维－Rgb电子有限公司 | A kind of Voltage Drop protection circuit, backlight drive power supply and television set |
| CN109274065B (en) * | 2018-11-23 | 2020-06-02 | 深圳市道通智能航空技术有限公司 | Monitoring circuit, battery and aircraft |
| CN112395144A (en) * | 2020-11-05 | 2021-02-23 | 深圳市鼎盛光电有限公司 | Test method, test system, terminal equipment and readable storage medium |
| CN113464481A (en) * | 2021-08-23 | 2021-10-01 | 小熊电器股份有限公司 | Desktop fan, and power-off protection control method and device for desktop fan |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107426618B (en) | 2019-11-29 |
| CN107197380A (en) | 2017-09-22 |
| CN107426618A (en) | 2017-12-01 |
| CN107426619B (en) | 2019-12-06 |
| CN107426617B (en) | 2020-03-06 |
| CN107426617A (en) | 2017-12-01 |
| CN107197380B (en) | 2019-12-06 |
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