CN104135634B

CN104135634B - Reset circuit and television set

Info

Publication number: CN104135634B
Application number: CN201410373559.9A
Authority: CN
Inventors: 徐遥令
Original assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Current assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Priority date: 2014-07-31
Filing date: 2014-07-31
Publication date: 2017-03-08
Anticipated expiration: 2034-07-31
Also published as: CN104135634A

Abstract

The invention discloses a kind of reset circuit, including the key-press module being connected with power supply, time delay module, control of discharge module and reset control module；Key-press module connects the triggering end of time delay module and the first triggering end of control of discharge module respectively, and the outfan of control of discharge module connects the discharge control terminal of time delay module, and the outfan of time delay module connects the triggering end of reset control module；Key-press module exports effective push button signalling when there being button to press, to drive time delay module to be charged；When charging reaches the first predeterminated voltage, output drive signal exports effective reset signal to drive the reset output terminal of reset control module to time delay module；Key-press module exports invalid push button signalling when no button is pressed, and triggering control of discharge module work exports discharge signal to the discharge control terminal of time delay module, so that time delay module repid discharge.The invention also discloses a kind of television set.Reset circuit of the present invention and television set, reliability is high, simple to operate and cost is lower.

Description

Reset circuit and television set

Technical field

The present invention relates to reset control field, more particularly, to reset circuit and television set.

Background technology

With the fast development of TV tech, intelligent television has obtained quick popularization, and existing intelligent television is due to work( Energy is stronger and stronger, system becomes increasingly complex, and leads to intelligent television to be frequently encountered various unusual conditions, for example, modal Deadlock.

Reset processing mode after existing intelligent television breaks down has：(1) switching on and shutting down are carried out using alternating-current switch, So that intelligent television is resetted after again exchanging electricity, in the case that intelligent television reset operation is carried out using this kind of mode, need Setting exchange mechanical switch, increased the cost of intelligent television, and exchanges the installation position of mechanical switch and be equipped with particular/special requirement and shadow Ring the terseness of TV overall appearance.(2) each button corresponds to single push button signalling, by the particular combination of multiple buttons Control intelligent television to carry out reset to restart, but the operation realizing intelligent television reset using the combination of multiple buttons is again Miscellaneous, and when any one button in this particular combination damages or lost efficacy, then lose reset function, reliability is low.(3) adopt With specifically some is restarted by key control intelligent television, thus realize intelligent television resetting, specific due to defining Some button, when this keys deactivation, such as：Button damages, and the button reason such as drop causes keys deactivation, the reset of TV Function will not exist, and same reliability is low.

In view of the above-mentioned deficiency of intelligent television, need a kind of easy to operate, low cost of offer badly, the high television set of reliability is multiple Position scheme.

Content of the invention

Present invention is primarily targeted at solving high cost or complex operation or the reliability of existing television set reset schemes Low technical problem.

For achieving the above object, the present invention provides a kind of reset circuit, including the key-press module being connected with power supply, time delay mould Block and reset control module；The outfan of described key-press module connects the triggering end of described time delay module and described electric discharge control respectively First triggering end of molding block, the outfan of described control of discharge module connects the discharge control terminal of described time delay module, described The outfan of time delay module connects the triggering end of described reset control module；

Described key-press module exports effective push button signalling when there being button to press, to drive described time delay module to be filled Electricity；, when charging reaches the first predeterminated voltage, output drive signal is to drive described reset control module for described time delay module Reset output terminal exports effective reset signal；Described key-press module exports invalid push button signalling when no button is pressed, and triggers institute State control of discharge module work output discharge signal to the discharge control terminal of described time delay module, so that described time delay module is quick Electric discharge.

Preferably, the reset output terminal of described reset control module connects the second triggering end of described control of discharge module； When described reset control module receives described drive signal, put described in the effective reset signal driving of its reset output terminal output Electric control module is charged；, when charging reaches the second predeterminated voltage, output discharge signal is to institute for described control of discharge module State time delay module；After described time delay module receives described discharge signal, export invalid drive signal to described reset control module, So that described reset control module is charged；When charging reaches three predeterminated voltages, it resets described reset control module Outfan exports invalid reset signal, and described control of discharge module repid discharge is to stop exporting discharge signal.

Preferably, described key-press module includes first resistor and multiple push-button unit, and described first resistor one end connects electricity Source, the other end of described first resistor is grounded through each push-button unit respectively, and the other end of described first resistor is described button The outfan of module；Described push-button unit includes function button and the fall being connected between the other end of described first resistor and ground Piezoresistance.

Preferably, to include first switch unit, second switch unit, first energy-storage units and first steady for described time delay module Pressure unit, wherein：

First conduction terminal of described first switch unit connects power supply, and the second conduction terminal of described first switch unit connects The charge-discharge end of first energy-storage units, the triggering end of described first switch unit is the triggering end of described time delay module；

The charge-discharge end of described first energy-storage units is also connected with the input of described first voltage regulation unit, described first voltage stabilizing The input of unit is the discharge control terminal of described time delay module；

The triggering end of described second switch unit connects the outfan of described first voltage regulation unit, described second switch unit The first conduction terminal be described time delay module outfan, described second switch unit second conduction terminal ground connection.

Preferably, described first switch unit includes the first PNP type triode and second resistance, described second switch unit Including the first NPN type triode, described first energy-storage units include the first electric capacity, and described first voltage regulation unit includes the first voltage stabilizing Pipe, wherein：

The base stage of described first PNP type triode is the triggering end of described time delay module, described first PNP type triode Emitter stage connects power supply, and the colelctor electrode of described first PNP type triode connects one end of described second resistance；Described first electric capacity One end connect the other end of described second resistance and the negative electrode of described first stabilivolt, the negative electrode of described first stabilivolt is institute State the discharge control terminal of time delay module, the other end ground connection of described first electric capacity；The base stage of described first NPN type triode connects The anode of described first stabilivolt, the grounded emitter of described first NPN type triode, the collection of described first NPN type triode Electrode is the outfan of described time delay module.

Preferably, described reset control module include the 3rd switch element, the 4th switch element, second energy-storage units, Two voltage regulation units, one-way conduction unit and partial pressure unit, wherein：

First conduction terminal of described 3rd switch element is the triggering end of described reset control module, and described 3rd switch is single First conduction terminal of unit connects power supply, and the second conduction terminal of described 3rd switch element connects the charge and discharge of described second energy-storage units Electric end and the conducting input of described one-way conduction unit, the conducting outfan of described one-way conduction unit connects the described 3rd and opens Close the first conduction terminal of unit, the triggering end of described 3rd switch element connect described 3rd switch element the first conduction terminal and The input of described second voltage regulation unit, the output head grounding of described second voltage regulation unit；

First conduction terminal of described 4th switch element connects the charge-discharge end of described second energy-storage units, and the described 4th opens The second conduction terminal closing unit is the reset output terminal of described reset control module, the first conduction terminal of described 4th switch element The triggering end of described 4th switch element is also connected through described partial pressure unit.

Preferably, described reset control module also includes 3rd resistor, the 4th resistance and the 5th resistance, described 3rd switch Unit includes the second NPN type triode, and described 4th switch pipe unit includes the second PNP type triode, described second voltage stabilizing list Unit includes the second stabilivolt, and described second energy-storage units include the second electric capacity, and described one-way conduction unit includes the first diode, Described partial pressure unit includes the 6th resistance and the 7th resistance, wherein：

The colelctor electrode of described second NPN type triode connects one end of described 4th resistance, described 4th resistance another Hold the triggering end for described reset control module；The other end of described 4th resistance connects power supply through described 3rd resistor；Described The base stage of the second NPN type triode connects the other end of described 4th resistance through described 5th resistance, described second stabilivolt Negative electrode connects the base stage of described second NPN type triode, the plus earth of described second stabilivolt；

The emitter stage of described second NPN type triode successively through described 6th resistance, the 7th resistance eutral grounding, described second The emitter stage of NPN type triode also connects its colelctor electrode through described first diode；

Described second electric capacity is connected in parallel on the two ends of described 6th resistance, and the emitter stage of described second PNP type triode connects The emitter stage of described second NPN type triode, the base stage of described second PNP type triode is through described 7th resistance eutral grounding, described The reset output terminal of the extremely described reset control module of the current collection of the second PNP type triode, the collection of described second PNP type triode Electrode is through a resistance eutral grounding.

Preferably, described control of discharge module include the 5th switch element, the 6th switch element, the 7th switch element, Three energy-storage units and the 3rd voltage regulation unit, wherein：

The input of described 3rd voltage regulation unit is the first triggering end of described control of discharge module, described 3rd voltage stabilizing list The outfan of unit connects the triggering end of described 7th switch element, and the first conduction terminal of described 7th switch element is described electric discharge The outfan of control module, the second conduction terminal ground connection of described 7th switch element；

First conduction terminal of the first conduction terminal described 7th switch element of connection of described 6th switch element, the described 6th Second conduction terminal ground connection of switch element, the triggering end of described 6th switch element connects described 3rd energy-storage units discharge and recharge End；

The triggering end of described 5th switch element is the second triggering end of described control of discharge module, and described 5th switch is single First conduction terminal of unit connects power supply, and the second conduction terminal of described 5th switch element connects the charge and discharge of described 3rd energy-storage units Electric end.

Preferably, described 5th switch element includes the 3rd PNP type triode, and the 6th switch element includes the 3rd NPN type Audion, the 7th switch element includes the 4th NPN type triode, and described 3rd voltage regulation unit includes the 3rd stabilivolt, and described Three energy-storage units include the 3rd electric capacity, described control of discharge module also include the second diode, the 3rd diode, the 8th resistance, 9th resistance, the tenth resistance, the 11st resistance and the 12nd resistance, wherein：

The grounded emitter of described 4th NPN type triode, the extremely described electric discharge of current collection of described 4th NPN type triode The outfan of control module, the base stage of described 4th NPN type triode connects the anode of described 3rd stabilivolt, and the described 3rd is steady The negative electrode of pressure pipe is the first triggering end of described control of discharge module；

One end of described 8th resistance is the second triggering end of described control of discharge module, the other end of described 8th resistance Connect the anode of described second diode, the negative electrode of described second diode is through described 9th resistance eutral grounding, described two or two pole The negative electrode of pipe is also connected with the base stage of described 3rd PNP type triode, and the emitter stage of described 3rd PNP type triode connects described the The negative electrode of three diodes, the anode of described 3rd diode connects power supply, and the colelctor electrode of described 3rd PNP type triode is through described Tenth resistance eutral grounding；One end of described 11st resistance connects the colelctor electrode of described 3rd PNP type triode, described 11st electricity , through described 3rd capacity earth, the other end of described 11st resistance is also described through described 12nd resistance connection for the other end of resistance The base stage of the 3rd NPN type triode, the grounded emitter of described 3rd NPN type triode, the collection of described 3rd NPN type triode Electrode connects the colelctor electrode of described 4th NPN type triode.

Additionally, for achieving the above object, the present invention also provides a kind of television set, including central processing unit with as above Reset circuit, the reset output terminal of described reset control module connects the reset signal end of described central processing unit.

The reset circuit of the present invention and television set, trigger reset by any button certain time of the module that pushes button Operation, all buttons on key-press module can realize the operation that resets, simple, convenient；Even if the part of key-press module is pressed Key damages, and also can carry out resetting operation it is ensured that the use of reset function by other buttons unspoiled, reliability height；And This key-press module can directly adopt the key-press module of equipment itself, additionally need not increase key-press module, and the equipment that maintains is overall outer The terseness seen；Meanwhile, compared to the mode being resetted using exchange mechanical switch, the reset schemes of the present invention, cost is more Low.

Brief description

The module diagram that Fig. 1 is connected with power supply for reset circuit first embodiment of the present invention；

The module diagram that Fig. 2 is connected with power supply for reset circuit second embodiment of the present invention；

Fig. 3 is the refinement module schematic diagram of time delay module in reset circuit 3rd embodiment of the present invention；

Fig. 4 is the refinement module schematic diagram of reset control module in reset circuit 3rd embodiment of the present invention；

Fig. 5 is the refinement module schematic diagram amplifying control module in reset circuit 3rd embodiment of the present invention；

Fig. 6 is the circuit diagram of key-press module and time delay module in reset circuit fourth embodiment of the present invention；

Fig. 7 is the circuit diagram of reset control module and control of discharge module in reset circuit fourth embodiment of the present invention.

The realization of the object of the invention, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.

Specific embodiment

It should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.

The present invention provides a kind of reset circuit, and with reference to Fig. 1, in the first embodiment, this reset circuit includes and power supply 50 Key-press module 10, time delay module 20 and the reset control module 30 connecting；The outfan KEY of key-press module 10 connects time delay respectively Triggering end P1 of module 20 and the first triggering end P4 of control of discharge module 40, the outfan C_S2 of control of discharge module 40 connects The discharge control terminal of time delay module 20, the outfan C_S1 of time delay module 20 connects triggering end P3 of reset control module 30；Press Key module 10 exports effective push button signalling when there being button to press, to drive time delay module 20 to be charged；Time delay module 20 exists When charging reaches the first predeterminated voltage, output drive signal is exported with driving the reset output terminal Reset of reset control module 30 Effective reset signal (exports the reset signal end of the MCU of the equipment controlling to reset circuit)；Key-press module 10 is pressed in no button Invalid push button signalling, the control of discharge of triggering control of discharge module 40 work output discharge signal to time delay module 20 will be exported when lower End, so that time delay module 20 repid discharge.First predeterminated voltage can be set according to actually used convenience demand；First is pre- If voltage is higher, it is longer to charge to the first predeterminated voltage required time, press needed for time delay module 20 output drive signal by The persistent period of key is longer.

The working method of the present embodiment reset circuit is：Time delay module 20 is made to enter by the button in the module 10 that pushes button Row charges, and after the button of key-press module 10 keeps pressing a period of time, time delay module 20 charges and reaches the first predeterminated voltage, time delay Module 20 output drive signal, to reset control module 30, is controlled to it with driving reset control module 30 to export effective reset signal The equipment of system is resetted；When whole buttons of key-press module 10 unclamp (i.e. no button is pressed), control of discharge module 40 is defeated Go out discharge signal to time delay module 20, make time delay module 20 fall the electric energy quick release of storage of charging, so that time delay module 20 not output drive signal to reset control module 30 so that reset control module 30 stop output reset signal, stop to it The reset operation of the equipment controlling.When no button is pressed, time delay module 20 is controlled to discharge by control of discharge module 40, in case Only retain electricity in time delay module 20 and affect to reset the accuracy operating or cause the operation that by mistake resets.

When the reset circuit of the present embodiment is applied in TV or other equipment, by the module 10 that pushes button any by Key certain time and trigger reset operation, all buttons on key-press module 10 can realize reset operation, even if key-press module 10 part button damages, and also can carry out resetting operation it is ensured that the use of reset function by other buttons unspoiled, reliable Property high；And this key-press module 10 can directly adopt the key-press module 10 of equipment itself, need not additionally increase key-press module 10, protect Hold the terseness of equipment overall appearance；Meanwhile, resetted compared to using exchange mechanical switch, the reset electricity of the present embodiment The scheme on road, cost is lower.

Further, with reference to Fig. 2, the scheme based on first embodiment of the present embodiment, in the present embodiment, reset and control The reset output terminal Reset of module 30 connects the second triggering end P5 of control of discharge module 40；Reset control module 30 receives During drive signal, the effective reset signal of its reset output terminal Reset output drives control of discharge module 40 to be charged；Electric discharge , when charging reaches the second predeterminated voltage, output discharge signal is to time delay module 20 for control module 40；Time delay module 20 receives and puts After the signal of telecommunication, export invalid drive signal to reset control module 30, so that reset control module 30 is charged；Reset and control When charging reaches three predeterminated voltages, its reset output terminal Reset exports invalid reset signal, control of discharge module to module 30 40 repid discharges are to stop exporting discharge signal.

The reset principle of the present embodiment reset circuit is：1) key-press module 10 keeps button to be pressed to reset circuit control Equipment completes to unclamp when resetting, then key-press module 10 exports effective push button signalling, and time delay module 20 charges, and time delay module 20 charges During to the first predeterminated voltage, output drive signal to reset control module 30, when reset control module 30 receives drive signal, defeated Go out effective reset signal, make the equipment that reset circuit controls start to reset；Meanwhile, control of discharge module 40 receives active homing letter Number and start to charge up, when control of discharge module 40 charges to three predeterminated voltages, control of discharge module 40 export discharge signal To time delay module 20, time delay module 20 receives discharge signal repid discharge and stops output drive signal, reset control module 30 Do not receive drive signal, then start to charge up, when reset control module 30 charges to the second predeterminated voltage, the invalid letter that resets of output Number, make the equipment that reset circuit controls complete to reset.2) key-press module 10 keeps button to press, and opens in reset control module 30 Begin to unclamp during output effective reset signal (equipment that i.e. reset circuit controls starts to reset), then key-press module 10 exports and effectively presses Key signals, time delay module 20 charges, and when time delay module 20 charges to the first predeterminated voltage, output drive signal controls mould to resetting Block 30, when reset control module 30 receives drive signal, exports effective reset signal, so that the equipment that reset circuit controls is started multiple Position；The button now pressed unclamps, and control of discharge module 40 output discharge signal, to time delay module 20, makes time delay module 20 quick Electric discharge, makes reset control module 30 start to charge up thus stopping output drive signal, it is pre- that reset control module 30 charges to second If during voltage, export invalid reset signal, make the equipment that reset circuit controls complete to reset.

The reset circuit of the present embodiment, by reset control module 30 in output effective reset signal, controls it to control Device reset and control control of discharge module 40 are charged, and make control of discharge module 40 reach the second predeterminated voltage in charging When (charge with a period of time after) output discharge signal, allow time delay module 20 repid discharge, thus time delay module 20 stops output and drives Dynamic signal to reset control module 30 makes reset control module 30 be charged, and it is pre- that reset control module 30 reaches the 3rd in charging If (after a period of time of charging) stopping output effective reset signal (exporting invalid reset signal) completes reseting procedure during voltage, And make control of discharge module 40 stop output discharge signal.The charging interval of control of discharge module 40 and reset control module 30 Charging interval makes reset circuit have sufficiently long resetting time, thus ensure that the equipment that reset circuit controls can fully reset； And in reset control module 30 charging process, control of discharge module 40 keeps output discharge signal to control time delay module 20 to put It is ensured that reset control module 30 is during output effective reset signal, key-press module 10 can not repeat to reset electricity Operation, it is to avoid frequent recovery and the resetting time long damage of equipment leading to reset circuit to control and exception.

Further, with reference to Fig. 3, the scheme of the present embodiment scheme based on second embodiment.The time delay mould of the present embodiment Block 20 includes first switch unit 21, second switch unit 22, first energy-storage units 23 and the first voltage regulation unit 24, wherein：The First conduction terminal of one switch element 21 connects power supply 50, and the second conduction terminal of first switch unit 21 connects first energy-storage units 23 charge-discharge end, the triggering end of first switch unit 21 is triggering end P1 of time delay module 20；The filling of first energy-storage units 23 Discharge end is also connected with the input of the first voltage regulation unit 24, and the input of the first voltage regulation unit 24 is the electric discharge control of time delay module 20 End P2 processed；The triggering end of second switch unit 22 is the outfan of the first voltage regulation unit 24, and the first of second switch unit 22 leads Go side connects the outfan C_S1 of time delay module 20, the second conduction terminal ground connection of second switch unit 22.

The operation principle of the present embodiment time delay module 20 is：When triggering end P1 of time delay module 20 receives key-press module 10 Button press and export effective push button signalling when, that is, first switch unit 21 triggering end receive effective push button signalling when, First switch unit 21 turns on, thus the second conduction terminal of first switch unit 21 is connected with power supply 50, power supply 50 stores up to first Can unit 23 be charged.If the button that key-press module 10 is pressed is constantly in down state, the triggering end of time delay module 20 P1 persistently receives effective push button signalling, then first switch unit 21 remains conducting, and power supply 50 is always to the first energy storage list Unit 23 charging；Charge after a period of time, reach the conducting voltage (i.e. the of the first voltage regulation unit 24 when first energy-storage units 23 charge During one predeterminated voltage), the first voltage regulation unit 24 turns on, and makes the triggering end of second switch unit 22 be changed into high level, second switch Unit 22 turns on, so that the first conduction terminal ground connection of second switch unit 22, that is, time delay module 20 output drive signal is (low Level).When discharge control terminal P2 of time delay module 20 receives discharge signal, that is, the charge-discharge end of energy-storage units receives and puts The signal of telecommunication, energy-storage units are not turned on through described discharge control terminal repid discharge, then the first voltage regulation unit 24, the 4th switch element 32 Triggering end no signal, the 4th switch element 32 ends, the non-low level of the first conduction terminal of the 4th switch element 32, i.e. time delay mould The outfan C_S1 not output drive signal of block 20.

Further, with reference to Fig. 4, the reset control module 30 of the present embodiment includes the 3rd switch element 31, the 4th switch Unit 32, second energy-storage units 33, the second voltage regulation unit 34, one-way conduction unit 35 and partial pressure unit 36, wherein：3rd switch First conduction terminal of unit 31 is triggering end P3 of reset control module 30, and the first conduction terminal of the 3rd switch element 31 connects electricity Source 50, the charge-discharge end of the second conduction terminal connection second energy-storage units 33 of the 3rd switch element 31 and one-way conduction unit 35 Conducting input, the conducting outfan of one-way conduction unit 35 connects the first conduction terminal of the 3rd switch element 31, the 3rd switch The triggering end of unit 31 connects the first conduction terminal of the 3rd switch element 31 and the input of the second voltage regulation unit 34, the second voltage stabilizing The output head grounding of unit 34；First conduction terminal of the 4th switch element 32 connects the charge-discharge end of second energy-storage units 33, the Second conduction terminal of four switch elements 32 is the reset output terminal Reset of reset control module 30, the of the 4th switch element 32 One conduction terminal also connects the triggering end of the 4th switch element 32 through partial pressure unit 36.

The operation principle of the reset control module 30 of the present embodiment is：Triggering end P3 of reset control module 30 does not receive During drive signal, the second voltage regulation unit 34 makes the triggering end of the 3rd switch element 31 stable in high level, the 3rd switch element 31 Conducting, power supply 50 charges to second energy-storage units 33, when second energy-storage units 33 are charged to the second predeterminated voltage, the 4th switch Unit 32 turns on, the second conduction terminal output high level of the 4th switch element 32, i.e. the reset output terminal of reset control module 30 Reset exports invalid reset signal.When triggering end P3 of reset control module 30 receives drive signal, the 3rd switch element 31 Triggering end is changed into low level, and the 3rd switch element 31 ends, and second energy-storage units 33 are quickly discharged through one-way conduction unit 35, The charge-discharge end of second energy-storage units 33 is low level, and the 4th switch element 32 ends, and the 4th switch element 32 exports effectively multiple Position signal.

Further, with reference to Fig. 5, the control of discharge module 40 of the present embodiment includes the 5th switch element 41, the 6th switch Unit 42, the 7th switch element 43, the 3rd energy-storage units 45 and the 3rd voltage regulation unit 44, wherein：3rd voltage regulation unit 44 defeated Enter the first triggering end P4 for control of discharge module 40 for the end, the outfan of the 3rd voltage regulation unit 44 connects the 7th switch element 43 Triggering end, the first conduction terminal of the 7th switch element 43 connects the outfan of control of discharge module 40, the 7th switch element 43 Second conduction terminal ground connection；First conduction terminal of the first conduction terminal connection the 7th switch element 43 of the 6th switch element 42, the 6th Second conduction terminal ground connection of switch element 42, the triggering end of the 6th switch element 42 connects the 3rd energy-storage units 45 charge-discharge end； The triggering end of the 5th switch element 41 is the second triggering end P5 of control of discharge module 40, the first conducting of the 5th switch element 41 End connects power supply 50, and the second conduction terminal of the 5th switch element 41 connects the charge-discharge end of the 3rd energy-storage units 45.

The operation principle of the control of discharge module 40 of the present embodiment is：1st, the first triggering end of discharge module receives button mould During the invalid push button signalling of block 10 output, that is, the input of the 3rd voltage regulation unit 44 receives invalid push button signalling, the 3rd voltage stabilizing Unit 44 turns on, and the triggering end of the 7th switch element 43 is high level, and the 7th switch element 43 turns on, thus the 7th switch element 43 the first conduction terminal is connected with the second conduction terminal, i.e. the first conduction terminal ground connection of the 7th switch element 43, i.e. control of discharge mould Outfan output discharge signal (low level) of block 40；Receive having of key-press module 10 output in the first triggering end of discharge module During effect push button signalling, the 3rd voltage regulation unit 44 ends, the triggering end no signal of the 7th switch element 43, the 7th 43 sections of switch element Stop, thus the first conduction terminal no signal of the 7th switch element 43.2nd, the second triggering end P5 in control of discharge module 40 receives During effective reset signal (i.e. the triggering end of the 5th switch element 41 receives effective reset signal) of reset control module 30 output, 5th switch element 41 turns on, and power supply 50 charges to the 3rd energy-storage units 45, presets when the 3rd energy-storage units 45 are charged to the 3rd During voltage (voltage making the 6th switch element 42 turn on), the 6th switch element 42 turns on, and the first of the 6th switch element 42 leads Go side is connected with its second conduction terminal, i.e. its first conduction terminal ground connection, the triggering end of control of discharge module 40；When in control of discharge (i.e. the 5th switch element 41 is tactile for the invalid reset signal of the second triggering end P5 reception reset control module 30 output of module 40 Make a start and receive invalid reset signal) when, the 5th switch element 41 ends, the 3rd energy-storage units 45 repid discharge, and the 6th switch is single The triggering end of unit 42 is low level, and the 6th switch element 42 ends, the first conduction terminal no signal of the 6th switch element 42.When First conduction terminal of the first conduction terminal of six switch elements 42 and the 7th switch element 43 all no signal when, control of discharge module 40 Outfan then do not export discharge signal；When having a conducting in the 6th switch element 42 and the 7th switch element 43, electric discharge control The outfan output discharge signal of molding block 40.

With reference to Fig. 6 and Fig. 7, the scheme of the present embodiment scheme based on second or third embodiments.The button of the present embodiment Module 10 includes first resistor R1 and multiple push-button unit 11, and first resistor R1 one end connects power supply 50, first resistor R1 another One end is grounded through each push-button unit 11 respectively, and the other end of first resistor R1 is the outfan KEY of key-press module 10；Button list The function button SW that unit 11 includes being connected between the other end of first resistor R1 and ground (uses " button " to represent in the following description " function button SW ") and dropping resistor Rx (resistance of dropping resistor Rx usually differs, also can be identical).Key-press module 10 exists When no button is pressed, the voltage of its outfan KEY is power supply 50 voltage (i.e. invalid push button signalling)；Key-press module 10 is having button When pressing, the voltage of its outfan KEY is that the voltage at the dropping resistor Rx two ends of the button place push-button unit 11 pressed (has Effect push button signalling), the voltage at this dropping resistor Rx two ends is the partial pressure to power supply 50 voltage for the push-button unit 11, and that is, effectively button is believed Number magnitude of voltage be less than invalid push button signalling magnitude of voltage.

In the time delay module 20 of the present embodiment, first switch unit 21 includes the first PNP type triode Q1 and second resistance R2, second switch unit 22 includes the first NPN type triode Q2, and first energy-storage units 23 include the first electric capacity C1, the first voltage stabilizing Unit 24 includes the first stabilivolt ZD1, wherein：The base stage of the first PNP type triode Q1 is triggering end P1 of time delay module 20, the The emitter stage of one PNP type triode Q1 connects power supply 50, and the colelctor electrode of the first PNP type triode Q1 connects the one of second resistance R2 End；One end of first electric capacity C1 connects the other end of second resistance R2 and the negative electrode of the first stabilivolt ZD1, the first stabilivolt ZD1 Negative electrode be time delay module 20 discharge control terminal P2, the first electric capacity C1 the other end ground connection；The base of the first NPN type triode Q2 Pole connects the anode of the first stabilivolt ZD1, the grounded emitter of the first NPN type triode Q2, the collection of the first NPN type triode Q2 Electrode is the outfan C_S1 of time delay module 20.The present embodiment is with first switch unit 21 as PNP type triode with second switch Unit 22 is preference for NPN type triode, and the reset circuit of the present embodiment is illustrated；Wherein, first switch unit 21 Triggering end, the first conduction terminal and the second conduction terminal be the base stage of the first PNP type triode Q1, collector and emitter successively, The triggering end of second switch unit 22, the first conduction terminal and the second conduction terminal are the base stage of the first NPN type triode Q2, collection successively Electrode and emitter stage.Certainly, first switch unit 21 and second switch unit 22 can also realize opening of said function for other Close pipe or switching device.The outfan through a resistance Ry1 and key-press module 10 for the base stage of the wherein first PNP type triode Q1 connects Connect, the base stage of the first NPN type triode Q2 is connected with the anode of the first stabilivolt ZD1 through a resistance Ry2.

The reset control module 30 of the present embodiment also includes 3rd resistor R3, the 4th resistance R4 and the 5th resistance R5, and the 3rd Switch element 31 includes the second NPN type triode Q3, and the 4th switch pipe unit includes the second PNP type triode Q4, the second voltage stabilizing Unit 34 includes the second stabilivolt ZD2, and second energy-storage units 33 include the second electric capacity C2, and one-way conduction unit 35 includes the one or two Pole pipe D1, partial pressure unit 36 includes the 6th resistance R6 and the 7th resistance R7, wherein：The colelctor electrode of the second NPN type triode Q3 is even Connect one end of the 4th resistance R4, the other end of the 4th resistance R4 is triggering end P3 of reset control module 30；Reset control module 30 triggering end P3 connects power supply 50 through 3rd resistor R3；The base stage of the second NPN type triode Q3 connects the through the 5th resistance R5 The other end of four resistance R4, the negative electrode of the second stabilivolt ZD2 connects the base stage of the second NPN type triode Q3, the second stabilivolt ZD2 Plus earth；The emitter stage of the second NPN type triode Q3 is successively through the 6th resistance R6, the 7th resistance R7 ground connection, the second NPN type The emitter stage of audion Q3 also connects its colelctor electrode through the first diode D1；Second electric capacity C2 is connected in parallel on the two of the 6th resistance R6 End, the emitter stage of the second PNP type triode Q4 connects the emitter stage of the second NPN type triode Q3, the second PNP type triode Q4 Base stage is grounded through the 7th resistance R7, the reset output terminal of the current collection extremely reset control module 30 of the second PNP type triode Q4 Reset, the colelctor electrode of the second PNP type triode Q4 is grounded through a resistance Rz1.In order to prevent reset output terminal Reset from exporting The voltage of the equipment that reset circuit controls is excessive, and the colelctor electrode of the second PNP type triode Q4 has also concatenated a resistance Rz2 and dropped Pressure.In the present embodiment with the 3rd switch element 31 as NPN type triode and the 4th switch element 32 as PNP type triode as a example, The present embodiment is illustrated；Wherein, the triggering end of the 3rd switch element 31, the first conduction terminal and the second conduction terminal are successively The base stage of two NPN type triode Q3, collector and emitter, the triggering end of the 4th switch element 32, the first conduction terminal and second Conduction terminal is the base stage of the second PNP type triode Q4, emitter and collector successively；Certainly, the 3rd switch element 31 and the 4th Switching tube or switching device that switch element 32 can also realize said function for other.

The present embodiment the 5th switch element 41 includes the 3rd PNP type triode Q5, and the 6th switch element 42 includes the 3rd NPN Type audion Q6, the 7th switch element 43 includes the 4th NPN type triode Q7, and the 3rd voltage regulation unit 44 includes the 3rd stabilivolt ZD3, the 3rd energy-storage units 45 include the 3rd electric capacity C3, and control of discharge module 40 also includes the second diode D2, the 3rd diode D3, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 11st resistance R11 and the 12nd resistance R12, wherein：4th The grounded emitter of NPN type triode Q7, the outfan of the current collection extremely control of discharge module 40 of the 4th NPN type triode Q7, The base stage of the 4th NPN type triode Q7 connects the anode of the 3rd stabilivolt ZD3, and the negative electrode of the 3rd stabilivolt ZD3 is control of discharge First triggering end P4 of module 40；One end of 8th resistance R8 is the second triggering end P5 of control of discharge module 40, the 8th resistance The other end of R8 connects the anode of the second diode D2, and the negative electrode of the second diode D2 is grounded through the 9th resistance R9, the two or two pole The negative electrode of pipe D2 is also connected with the base stage of the 3rd PNP type triode Q5, and the emitter stage of the 3rd PNP type triode Q5 connects the three or two pole The negative electrode of pipe D3, the anode of the 3rd diode D3 connects power supply 50, and the colelctor electrode of the 3rd PNP type triode Q5 is through the tenth resistance R10 is grounded；One end of 11st resistance R11 connects the colelctor electrode of the 3rd PNP type triode Q5, and the 11st resistance R11's is another End is grounded through the 3rd electric capacity C3, and the other end of the 11st resistance R11 also connects the 3rd NPN type triode through the 12nd resistance R12 The base stage of Q6, the grounded emitter of the 3rd NPN type triode Q6, the colelctor electrode of the 3rd NPN type triode Q6 connects the 4th NPN type The colelctor electrode of audion Q7.The present embodiment with the 5th switch element 41, as PNP type triode and open by the 6th switch element the 42, the 7th Close unit 43 for, as a example NPN type triode, illustrating to the reset circuit of the present embodiment；Wherein, the 5th switch element 41 Triggering end, the first conduction terminal and the second conduction terminal are the base stage of the 3rd PNP type triode Q5, emitter and collector successively, the The triggering end of six switch elements 42, the first conduction terminal and the second conduction terminal are the base stage of the 3rd NPN type triode Q6, current collection successively Pole and emitter stage, the triggering end of the 7th switch element 43, the first conduction terminal and the second conduction terminal are the 4th NPN type triode successively The base stage of Q7, collector and emitter.Certainly, the 5th switch element 41, the 6th switch element 42 and the 7th switch element 43 The switching tube that said function can be realized for other or switching device.

It should be noted that the present embodiment be the physical circuit shown in Fig. 6 and Fig. 7 as preference, to reset circuit Carry out a detailed elaboration, all devices in Fig. 6 and Fig. 7 all can use other devices or circuit of identical function etc. to substitute.

With reference to Fig. 6 with Fig. 7 (in Fig. 6 with Fig. 7, label identical line end is connected), and with reset circuit in TV Use in machine, as a example reset circuit controls the CPU of television set, the present embodiment reset circuit is described in detail.

(1), when television set works on power, to key-press module 10, time delay module 20, reset control respectively by output voltage for power supply 50 Molding block 30 and control of discharge module 40, reset circuit makes television set automatically carry out initial reset.Its specific reset mode is： Key-press module 10 no operates (not having button to press), and its outfan KEY voltage is power supply 50 voltage (i.e. invalid push button signalling), I.e. the base voltage of the first PNP type triode Q1 is power supply 50 voltage so that the emitter stage of the first PNP type triode Q1 and base stage Between pressure reduction be less than the first PNP type triode Q1 threshold voltage (usually 0.7V), first PNP type triode Q1 cut-off, A The voltage of point is 0V, and that is, the base stage of the first NPN type triode Q2 is 0V, the first NPN type triode Q2 cut-off, the first NPN type three The colelctor electrode no signal output (i.e. the outfan C_S1 of time delay module 20 no drive signal output) of pole pipe Q2.Time delay module 20 is not Output drive signal, then the triggering end P3 no signal (being equivalent to disconnection) of reset control module 30, power supply 50 is successively through the seven the Three resistance R3, the 5th resistance R5 and the second stabilivolt ZD2 form conducting loop to ground, and the negative electrode of the second stabilivolt ZD2 is high electricity Flat (i.e. the base stage of the second NPN type triode Q3 is high level), the pressure between the base stage of the second NPN type triode Q3 and emitter stage , more than the threshold voltage of the second NPN type triode Q3, the second NPN type triode Q3 conducting, power supply 50 is successively through 3rd resistor for difference R3, the 4th resistance R4, the 6th resistance R6 and the 7th resistance R7 to ground form conducting loop, and C point is high level (i.e. the second positive-negative-positive The transmitting of audion Q4 extremely high level), C point voltage is started to charge up to the second electric capacity C2 by the 7th resistance R7, due to second The pressure drop of electric capacity C2 can not be mutated, and is high level when the base stage of the therefore second PNP type triode Q4 starts, the second positive-negative-positive three pole Pipe Q4 ends, the current collection extremely low level of the second PNP type triode Q4, i.e. the reset output terminal Reset of reset control module 30 Output low level (for effective reset signal), makes the CPU of television set start to reset；After second electric capacity C2 charging a period of time (i.e. Reset control module 30 charges when reaching three predeterminated voltages), the pressure reduction at the second electric capacity C2 two ends is more than the second PNP type triode The threshold voltage of Q4, the second PNP type triode Q4 conducting, the current collection extremely high level of the second PNP type triode Q4, reset and control Reset output terminal Reset output high level (for invalid reset signal) of module 30, makes the CPU of television set complete to reset, TV Machine normally starts work.

(2) after television set normal work, when break down or other in the case of, need be controlled reset when, Yong Huke Resetted by the CPU that key-press module 10 controls television set, concrete mode is：Any button in the module that pushes button 10 is simultaneously Keep down state, power supply 50 arrives with being conducting to through the push-button unit 11 that first resistor R1 and the button pressed are located, then button The voltage of the outfan KEY of module 10 is the partial pressure to power supply 50 voltage of button place push-button unit 11, and this partial pressure is less than electricity Source 50 voltage, the emitter stage of the first PNP type triode Q1 and the pressure reduction of base stage are more than the threshold value electricity of the first PNP type triode Q1 Pressure, the first PNP type triode Q1 conducting, power supply 50 voltage is charged to the first electric capacity C1 through second resistance R2, due to first The pressure drop of electric capacity C1 can not be mutated, and when the first electric capacity C1 starts to charge up, the first stabilivolt ZD1 is not turned on, the first NPN type triode The base stage no-voltage of Q2, the first NPN type triode Q2 cut-off, time delay module 20 not output drive signal, reset control module 30 Working condition is constant, keeps invalid reset signal output, and the CPU of TV is not resetted；When first electric capacity C1 charge one section when Between after while reaching the first predeterminated voltage (i.e. time delay module 20 charge), the first stabilivolt ZD1 conducting, the first NPN type triode Q2 Base voltage be high level, first NPN type triode Q2 conducting, outfan C_S1 (i.e. first NPN type three of time delay module 20 The colelctor electrode of pole pipe Q2) export low level signal (drive signal) to reset control module 30, the triggering of reset control module 30 End P3 is low level, then power supply 50 voltage of reset control module 30 is directly conducting to ground, the second stabilivolt through 3rd resistor R3 ZD2 is not turned on, and the base stage of the second NPN type triode Q3 is low level, the second NPN type triode Q3 cut-off, the second electric capacity C2 storage The electric energy deposited quickly discharges through the first diode D1, and the two ends of the second electric capacity C2 are all low level, the second PNP type triode Q4 Emitter stage and base stage are all low level, the second PNP type triode Q4 cut-off, the reset output terminal Reset of reset control module 30 Output effective reset signal makes the CPU of television set start to reset；The reset output terminal Reset output of reset control module 30 simultaneously Low level (effective trigger), D point is low level, and that is, the base stage of the 3rd PNP type triode Q5 is low level, and the 3rd PNP The transmitting extremely high level of type audion Q5, so the 3rd PNP type triode Q5 conducting, power supply 50 through the 3rd diode D3, the 11 resistance R11 start to charge up to the 3rd electric capacity C3, and the pressure drop due to the 3rd electric capacity C3 can not be mutated, and the therefore the 3rd electric capacity C3 opens When beginning to charge, the base stage of the 3rd NPN type triode Q6 is low level, the 3rd NPN type triode Q6 cut-off, the 3rd NPN type three pole The colelctor electrode no signal of pipe Q6；Simultaneously as there being button to press, the 3rd stabilivolt ZD3 is not turned on, the 4th NPN type triode Q7 Base stage be low level, the 4th NPN type triode Q7 cut-off, the colelctor electrode no signal of the 4th NPN type triode Q7；So electric discharge The outfan C_S2 of control module 40 does not export discharge signal, and time delay module 20 remains unchanged and keeps drive signal output, resets and controls Module 30 keeps output effective reset signal to make the cpu reset of television set；(discharge after the 3rd electric capacity C3 charges a period of time Control module 40 charges when reaching the second predeterminated voltage), E point is high level, and that is, the base stage of the 3rd NPN type triode Q6 is high electricity Flat, the 3rd NPN type triode Q6 conducting, the grounded collector of the 3rd NPN type triode Q6 is low level, i.e. control of discharge module , to time delay module 20, the first electric capacity C1 is through the 3rd NPN type triode Q6 for 40 outfan C_S2 output low level (discharge signal) Arrive ground repid discharge, A point is changed into low level, and the first stabilivolt ZD1 is not turned on, and the base stage of the first NPN type triode Q2 is changed into low Level, the first NPN type triode Q2 cut-off, the colelctor electrode no signal of the first NPN type triode Q2, time delay module 20 does not export drive Dynamic signal；Power supply 50 is conducting to ground, the second NPN type triode Q3 through 3rd resistor R3, the 5th resistance R5 and the second stabilivolt ZD2 Base stage is high level, the second NPN type triode Q3 conducting, and C point is high level, and C point starts the second electric capacity C2 is charged, charging one After the section time, the pressure drop at the second electric capacity C2 two ends is more than the threshold voltage of the second PNP type triode Q4, the second PNP type triode Q4 turns on, and reset output terminal Reset output high level (invalid reset signal) of reset control module 30 makes the CPU of television set complete Become to reset；Reset output terminal Reset output high level (invalid trigger) of reset control module 30 simultaneously, D point is high electricity Flat, the 3rd PNP type triode Q5 cut-off, the 3rd electric capacity C3 through the 11st resistance R11 and the tenth resistance R10 arrive repid discharge, The base voltage of the 3rd NPN type triode Q6 is changed into low level, the 3rd NPN type triode Q6 cut-off, control of discharge module 40 Outfan C_S2 does not export discharge signal.

The reset circuit of the present embodiment, in reseting procedure, due to discharge module make time delay module 20 keep electric discharge so that Now can not be controlled by the button operation of key-press module 10 and reset again, it is to avoid reset excessively frequently or resetting time mistake Long, the damage that the CPU of television set is caused or fault.Meanwhile, filled by the charging interval and the 3rd electric capacity C3 of the second electric capacity C2 The electric time ensure that the CPU of television set can fully reset.And, when key-press module 10 no press by button, key-press module 10 Outfan is power supply 50 voltage, makes the 3rd stabilivolt ZD3 conducting, so that the 4th NPN type triode Q7 conducting, control of discharge mould The electric energy that first electric capacity C1 stores is bled off by block 40 output discharge signal, it is to avoid using the keypress function on key-press module 10 When (for example carry out changing the operation such as channel, plus/minus volume using the button of key-press module 10), the accumulation to the first electric capacity C1 is charged And bring the operation that by mistake resets it is ensured that the required button of operation that resets presses duration.

(3) television set (i.e. reset circuit no reset operation) in normal course of operation, the output voltage moment of power supply 50 When falling：In the present embodiment with power supply 50 voltage of reset control module 30 as 12V, the conducting voltage of the second stabilivolt ZD2 be As a example 8V, it is described in detail.

Assume second stabilivolt ZD2 conducting when electric current be Iz, second NPN type triode Q3 conducting when base current be Ib is it is known that Iz is far longer than Ib.

When the insufficient amplitude of power supply 50 voltage decline abruptly is big (after power supply 50 Voltage Drop of such as reset control module 30 Magnitude of voltage be changed into 9V) so that second stabilivolt ZD2 continue conducting, B point voltage still be 8V, the second NPN type triode Q3 is still Saturation conduction, does not affect the magnitude of voltage of C point, and that is, still in conducting state, reseting module keeps output to the second PNP type triode Q4 Invalid reset signal, the CPU of television set does not reset, and television set is still normal to be run.

When the amplitude of power supply 50 voltage decline abruptly continues to expand so that power supply 50 Voltage Drop is to equal to threshold voltage , so that the second stabilivolt ZD2 cut-off, the electric current flowing through the 5th resistance R5 is by Iz+Ib for Vth (threshold voltage Vth is slightly larger than 8V) It is changed into Ib, because Iz is far longer than Ib, the pressure drop of the 5th resistance R5 is negligible too late, B point voltage is still 8V, the second NPN type three pole Pipe Q3 still saturation conduction, does not affect the magnitude of voltage of C point, and the CPU of television set does not reset, and television set normally runs.

It is less than threshold voltage Vth but be more than the Vth-0.7V (pressure drop of diode D1 after power supply 50 voltage decline abruptly For 0.7V) when, then C point voltage value is less than 7.3V, because the second electric capacity C2 voltage can not be mutated, the second PNP type triode Q4 Pressure drop between emitter stage and base stage remains as the threshold voltage more than the second PNP type triode Q4, the second PNP type triode Q4 Conducting, reset output terminal Reset continues to output invalid reset signal, and the CPU of television set does not reset, and television set normally runs.When When being less than threshold voltage Vth after power supply 50 voltage decline abruptly, and maintaining a period of time, the second electric capacity C2 passes through the 6th resistance The pressure drop between the emitter stage of the second PNP type triode Q4 and base stage is made to be less than the second PNP type triode Q4 after R6 electric discharge Threshold voltage, then the second PNP type triode Q4 cut-off, reset output terminal Reset exports effective reset signal, makes television set CPU is resetted；After a period of time, power supply 50 voltage reverts to 12V and the second electric capacity C2 is charged, due to the second electric capacity C2 Pressure drop can not be mutated so that the second PNP type triode Q4 remain unchanged end, make television set CPU continue reset, until second electricity The pressure drop that appearance C2 charges between the emitter stage making the second PNP type triode Q4 and base stage is more than the second PNP type triode Q4 Threshold voltage and when turning on, reset output terminal Reset exports invalid reset signal, makes the CPU of television set complete to reset.

(the dropping to of such as power supply 50 voltage when being less than threshold voltage Vth-0.7V after power supply 50 voltage decline abruptly 7V), the second NPN type triode Q3 cut-off, the first diode D1 conducting, the second electric capacity C2 is discharged rapidly by the first diode D1 Make C point voltage value be changed into Vth-0.7V, make the pressure drop between the emitter stage of the second PNP type triode Q4 and base stage be less than second The threshold voltage of PNP type triode Q4, the second PNP type triode Q4 cut-off, reset output terminal Reset exports effective reset signal Make the cpu reset of television set；After a period of time, power supply 50 voltage reverts to 12V and the second electric capacity C2 is charged, due to second The pressure drop of electric capacity C2 can not be mutated the cut-off so that the second PNP type triode Q4 remains unchanged, and makes the CPU of television set continue to reset, until The pressure drop that second electric capacity C2 charges between the emitter stage making the second PNP type triode Q4 and base stage is more than the second positive-negative-positive three pole The threshold voltage of pipe Q4 and when turning on, reset output terminal Reset exports invalid reset signal, makes the CPU of television set complete to reset.

Therefore, 1, when power supply 50 Voltage Drop is to threshold voltage Vth, the CPU of television set is made not reset；2nd, falling To Vth～Vth-0.7V and drop-out time very in short-term (i.e. quickly recover 12V), so that the CPU of television set is not resetted, But when dip duration is long, reset control module 30 can make the CPU of television set be resetted automatically；Dropping to less than Vth- During 0.7V, reset control module 30 can make the CPU of television set reset immediately automatically.The reset circuit of the present embodiment, can be in electricity Source 50 voltage (i.e. the running voltage of television set) makes the cpu reset of television set automatically so that television set is in electric voltage exception when falling Shi Zidong recovers, and simultaneously when amplitude of falling is less, is not automatically reset, and effectively prevent to running voltage fluctuation excessively spirit The quick and frequent recovery that causes, improves the overall performance of television set.

The present invention also provides a kind of television set, and this television set includes central processing unit and reset circuit, reset control module 30 reset output terminal connects the reset signal end of central processing unit.This reset circuit may include the technology of any of the above-described embodiment Scheme, its detailed construction can refer to Fig. 1-Fig. 7, and therefore not to repeat here.Due to employing the scheme of foregoing reset circuit, the present invention Television set compared to existing television set for, reliability is high, simple to operate, more succinct and cost is lower.

These are only the preferred embodiments of the present invention, not thereby limit the present invention the scope of the claims, every using this Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other related skills Art field, is included within the scope of the present invention.

Claims

1. a kind of reset circuit it is characterised in that include is connected with power supply key-press module, time delay module, control of discharge module And reset control module；The outfan of described key-press module connects the triggering end of described time delay module and described electric discharge control respectively First triggering end of molding block, the outfan of described control of discharge module connects the discharge control terminal of described time delay module, described The outfan of time delay module connects the triggering end of described reset control module；

Described key-press module exports effective push button signalling when there being button to press, to drive described time delay module to be charged；Institute State time delay module when charging reaches the first predeterminated voltage, output drive signal is to drive the reset of described reset control module defeated Go out end output effective reset signal；Described key-press module exports invalid push button signalling when no button is pressed, and triggers described electric discharge The discharge control terminal of control module work output discharge signal extremely described time delay module, so that described time delay module repid discharge；

The reset output terminal of described reset control module connects the second triggering end of described control of discharge module；Described reset controls When module receives described drive signal, the effective reset signal of its reset output terminal output drives described control of discharge module to enter Row charges；, when charging reaches the second predeterminated voltage, output discharge signal is to described time delay module for described control of discharge module；Institute After stating the time delay module described discharge signal of reception, export invalid drive signal to described reset control module, so that described reset Control module is charged；, when charging reaches three predeterminated voltages, the output of its reset output terminal is no for described reset control module Effect reset signal, described control of discharge module repid discharge is to stop exporting discharge signal.

2. reset circuit as claimed in claim 1 is it is characterised in that described key-press module includes first resistor and multiple button Unit, described first resistor one end connects power supply, and the other end of described first resistor is grounded through each push-button unit respectively, described The other end of first resistor is the outfan of described key-press module；Described push-button unit includes being connected on the another of described first resistor Function button between one end and ground and dropping resistor.

3. reset circuit as claimed in claim 1 it is characterised in that described time delay module include first switch unit, second Switch element, first energy-storage units and the first voltage regulation unit, wherein：

First conduction terminal of described first switch unit connects power supply, and the second conduction terminal of described first switch unit connects first The charge-discharge end of energy-storage units, the triggering end of described first switch unit is the triggering end of described time delay module；

The charge-discharge end of described first energy-storage units is also connected with the input of described first voltage regulation unit, described first voltage regulation unit Input be described time delay module discharge control terminal；

The triggering end of described second switch unit connects the outfan of described first voltage regulation unit, and the of described second switch unit One conduction terminal is the outfan of described time delay module, the second conduction terminal ground connection of described second switch unit.

4. reset circuit as claimed in claim 3 is it is characterised in that described first switch unit includes the first positive-negative-positive three pole Pipe and second resistance, described second switch unit includes the first NPN type triode, and described first energy-storage units include the first electricity Hold, described first voltage regulation unit includes the first stabilivolt, wherein：

The base stage of described first PNP type triode is the triggering end of described time delay module, the transmitting of described first PNP type triode Pole connects power supply, and the colelctor electrode of described first PNP type triode connects one end of described second resistance；The one of described first electric capacity End connects the other end of described second resistance and the negative electrode of described first stabilivolt, and the negative electrode of described first stabilivolt is described prolonging When module discharge control terminal, described first electric capacity the other end ground connection；The base stage of described first NPN type triode connects described The anode of the first stabilivolt, the grounded emitter of described first NPN type triode, the colelctor electrode of described first NPN type triode Outfan for described time delay module.

5. reset circuit as claimed in claim 1 it is characterised in that described reset control module include the 3rd switch element, 4th switch element, second energy-storage units, the second voltage regulation unit, one-way conduction unit and partial pressure unit, wherein：

First conduction terminal of described 3rd switch element is the triggering end of described reset control module, described 3rd switch element First conduction terminal connects power supply, and the second conduction terminal of described 3rd switch element connects the charge-discharge end of described second energy-storage units With the conducting input of described one-way conduction unit, the described 3rd switch list of conducting outfan connection of described one-way conduction unit First conduction terminal of unit, the triggering end of described 3rd switch element connects the first conduction terminal of described 3rd switch element and described The input of the second voltage regulation unit, the output head grounding of described second voltage regulation unit；

First conduction terminal of described 4th switch element connects the charge-discharge end of described second energy-storage units, and described 4th switch is single Second conduction terminal of unit is the reset output terminal of described reset control module, the first conduction terminal also warp of described 4th switch element Described partial pressure unit connects the triggering end of described 4th switch element.

6. reset circuit as claimed in claim 5 it is characterised in that described reset control module also include 3rd resistor, Four resistance and the 5th resistance, described 3rd switch element includes the second NPN type triode, and described 4th switch pipe unit includes the Two PNP type triode, described second voltage regulation unit includes the second stabilivolt, and described second energy-storage units include the second electric capacity, institute State one-way conduction unit and include the first diode, described partial pressure unit includes the 6th resistance and the 7th resistance, wherein：

The colelctor electrode of described second NPN type triode connects one end of described 4th resistance, and the other end of described 4th resistance is The triggering end of described reset control module；The other end of described 4th resistance connects power supply through described 3rd resistor；Described second The base stage of NPN type triode connects the other end of described 4th resistance, the negative electrode of described second stabilivolt through described 5th resistance Connect the base stage of described second NPN type triode, the plus earth of described second stabilivolt；

The emitter stage of described second NPN type triode is successively through described 6th resistance, the 7th resistance eutral grounding, described second NPN type The emitter stage of audion also connects its colelctor electrode through described first diode；

Described second electric capacity is connected in parallel on the two ends of described 6th resistance, and the emitter stage connection of described second PNP type triode is described The emitter stage of the second NPN type triode, the base stage of described second PNP type triode through described 7th resistance eutral grounding, described second The reset output terminal of the extremely described reset control module of the current collection of PNP type triode, the colelctor electrode of described second PNP type triode Through a resistance eutral grounding.

7. reset circuit as claimed in claim 1 it is characterised in that described control of discharge module include the 5th switch element, 6th switch element, the 7th switch element, the 3rd energy-storage units and the 3rd voltage regulation unit, wherein：

The input of described 3rd voltage regulation unit is the first triggering end of described control of discharge module, described 3rd voltage regulation unit Outfan connects the triggering end of described 7th switch element, and the first conduction terminal of described 7th switch element is described control of discharge The outfan of module, the second conduction terminal ground connection of described 7th switch element；

First conduction terminal of described 6th switch element connects the first conduction terminal of described 7th switch element, described 6th switch Second conduction terminal ground connection of unit, the triggering end of described 6th switch element connects described 3rd energy-storage units charge-discharge end；

The triggering end of described 5th switch element is the second triggering end of described control of discharge module, described 5th switch element First conduction terminal connects power supply, and the second conduction terminal of described 5th switch element connects the discharge and recharge of described 3rd energy-storage units End.

8. reset circuit as claimed in claim 7 is it is characterised in that described 5th switch element includes the 3rd positive-negative-positive three pole Pipe, the 6th switch element includes the 3rd NPN type triode, and the 7th switch element includes the 4th NPN type triode, and the described 3rd is steady Pressure unit includes the 3rd stabilivolt, and described 3rd energy-storage units include the 3rd electric capacity, and described control of discharge module also includes second Diode, the 3rd diode, the 8th resistance, the 9th resistance, the tenth resistance, the 11st resistance and the 12nd resistance, wherein：

The grounded emitter of described 4th NPN type triode, the extremely described control of discharge of current collection of described 4th NPN type triode The outfan of module, the base stage of described 4th NPN type triode connects the anode of described 3rd stabilivolt, described 3rd stabilivolt Negative electrode be described control of discharge module the first triggering end；

One end of described 8th resistance is the second triggering end of described control of discharge module, and the other end of described 8th resistance connects The anode of described second diode, the negative electrode of described second diode through described 9th resistance eutral grounding, described second diode Negative electrode is also connected with the base stage of described 3rd PNP type triode, and the emitter stage of described 3rd PNP type triode connects the described 3rd 2 The negative electrode of pole pipe, the anode of described 3rd diode connects power supply, and the colelctor electrode of described 3rd PNP type triode is through the described tenth Resistance eutral grounding；One end of described 11st resistance connects the colelctor electrode of described 3rd PNP type triode, described 11st resistance The other end also connects the described 3rd through described 12nd resistance through described 3rd capacity earth, the other end of described 11st resistance The base stage of NPN type triode, the grounded emitter of described 3rd NPN type triode, the colelctor electrode of described 3rd NPN type triode Connect the colelctor electrode of described 4th NPN type triode.

9. a kind of television set, including central processing unit it is characterised in that described television set is also included as appointed in claim 1-8 Reset circuit described in one, the reset output terminal of described reset control module connects the reset signal of described central processing unit End.