CN104638928A - Power supply device and image display device - Google Patents
Power supply device and image display device Download PDFInfo
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- CN104638928A CN104638928A CN201410643101.0A CN201410643101A CN104638928A CN 104638928 A CN104638928 A CN 104638928A CN 201410643101 A CN201410643101 A CN 201410643101A CN 104638928 A CN104638928 A CN 104638928A
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- circuit
- voltage
- switching circuit
- switching
- state
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention provides a power supply device and an image display device, wherein the damage to a power control circuit is avoided, and the power consumption in the standby state is reduced. The primary winding (18a) of a switch transformer (18) is connected with a switch element (26). The switch element (26) is controlled by a switching power control circuit (24). The switching power control circuit (24) is used for acquiring a rectified voltage (V44) acquired through rectifying the voltage of an AC power supply. Meanwhile, the output voltage of the driving winding (18c) of the switch transformer (18) is received by second switching circuit (22), and then the output voltage is rectified to generate a rectified voltage (V48). The power fed by a power supply component (38) is supplied to a standby control circuit (40) so as to control switching circuits (21, 22).
Description
Technical field
The present invention relates to power supplier and possess the image display of power supplier.
Background technology
In the power supplier of various electric equipment, current general use switching power circuit.Such as at RCC (Ringing Choke Converter, auto-excitation type transducer) mode and quasi-resonance mode switching power circuit in adopt with the following method more: in the holding state (during underload) of electric equipment, reducing switching loss by carrying out intermittent switch motion, cutting down electric equipment power consumption in the standby state.
Further, recently the performance of the electrical storage devices such as double charge layer capacitor is improved, while making control IC low power consumption, the electric power that the electric equipment of holding state can be made only to utilize to be provided from electrical storage device can carry out long action.
And be known to following structure: cut off the input of alternating voltage and shutdown switch power circuit (patent documentation 1) by latching relay (latching relay) in the standby state.In the structure shown here, although do not need to continue to control coil inflow current, in order to transfer relay needed to flow into larger electric current to control coil more than the stipulated time.For this reason, sometimes in order to for drived control coil, and need to use the electrical storage device be used for outside readiness control circuit.
Further, switch sound due to relay can be produced, and the electric equipment requiring quiet action can not be applied to.Further, sometimes latching relay due to can double-throw contact state unintentionally from the vibration of outside or impact etc.
Further, it is also known that following structure, this structure has: main switch power circuit, and it provides voltage when the usual action of electric equipment; And standby switching power circuit, it provides voltage (patent documentation 2) when standby action to readiness control circuit.In the structure shown here, when electric equipment becomes holding state, by providing the control of the readiness control circuit of voltage since standby switching power circuit, and stop main switch power circuit.
This main switch power circuit is configured to: carry out rectification to the alternating voltage from AC power, and the voltage produced in the driving winding of the pulse transformer of this commutating voltage and Switching Power Supply is input to the single power voltage input terminal of switching power source control circuit.Further, when electric equipment is in holding state, make the voltage being input to this power voltage input terminal be the lower value that main switch power supply is stopped, thus main switch power supply is stopped.
But under most cases, the voltage of switching power source control circuit according to input and the load characteristic of switching power source control circuit self, be respectively arranged with the power voltage input terminal employed and the power voltage input terminal of driving.For the switching power source control circuit being provided with the power voltage input terminal employed and drive like this, when applying the structure of patent documentation 2, power supply input from the wherein power voltage input terminal of a side can only be controlled, and Switching Power Supply can not be made to stop completely.And, when described above ON-OFF control circuit is provided with multiple power voltage input terminal, need to carry out considering do not also have the hurtful control of switch element self to switching power source control circuit and circumferential component thereof, but do not carry out such consideration in the structure of patent documentation 2.
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication No. 3471283 publication (the 1st page, Fig. 1, Figure 15, Figure 16, Figure 17)
Patent documentation 2: Japanese Patent No. 4467393 publication (the 1st page, Fig. 1, Fig. 2, Fig. 3)
Summary of the invention
The object of the invention is to, realize a kind of power supplier, this power supplier can avoid damaging the switching power source control circuit and circumferential component thereof that possess starting voltage input terminal and driving voltage input terminal, and can cut down the power consumption under holding state.
For solving the means of problem
The feature of power supplier of the present invention is, it has: the 1st rectification circuit, and it carries out rectification to the alternating voltage from AC power and exports the 1st commutating voltage, switch transformer, it has the winding and secondary winding and driving winding that are provided described 1st commutating voltage, 2nd rectification circuit, it carries out rectification to the alternating voltage exported from described secondary winding and exports the 2nd commutating voltage, electrical storage device, described 2nd commutating voltage is carried out electric power storage as input by it, and output dc voltage, readiness control circuit, its with the direct voltage exported from described electrical storage device for power supply carries out action, 3rd rectification circuit, it carries out rectification to the alternating voltage exported from described driving winding and exports the 3rd commutating voltage, switch element, it turns on/off the electric current flowing to a described winding, switching power source control circuit, it has starting voltage input terminal and driving voltage input terminal, carries out on/off control to described switch element, 1st switching circuit, its on/off is for the applying of described 1st commutating voltage of described starting voltage input terminal, and the 2nd switching circuit, its on/off is for the applying of described 3rd commutating voltage of described driving voltage input terminal, described switching power source control circuit according to be provided to described starting voltage input terminal described 1st commutating voltage rising and start to carry out the control action for described switch element, to described 3rd commutating voltage of described driving voltage input terminal be supplied to as power supply, proceed the control action for described switch element, the ON/OFF state of described readiness control circuit to described 1st switching circuit and described 2nd switching circuit controls, by connecting described 1st switching circuit, described 1st commutating voltage is applied to described starting voltage input terminal as starting voltage, by connecting described 2nd switching circuit, described 3rd commutating voltage is applied to described driving voltage input terminal as driving voltage.
The feature of image display of the present invention is, it has above-mentioned power supplier; And load circuit, it receives the supply of the electric power exported from described 2nd rectification circuit of described power supplier, and described load circuit carries out the process for show image.
According to the present invention, because this power supplier has: the voltage of the starting voltage input terminal of subtend switching power source control circuit applies the 1st switching circuit carrying out controlling, and the voltage of polar driving voltage input-terminal applies to carry out the 2nd switching circuit that controls, also there is the readiness control circuit controlled these switching circuits, therefore, can avoid damaging switching power source control circuit and circumferential component thereof, and the power consumption under holding state can be cut down.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the power supplier that embodiments of the present invention 1 are shown.
Fig. 2 illustrates the circuit diagram that can be used as the structure example of the switching circuit of the switching circuit 21,22 of Fig. 1.
Fig. 3 is the structured flowchart of the power supplier that embodiments of the present invention 2 are shown.
(a) ~ (d) of Fig. 4 is the timing waveform of the change case of the signal of control switch circuit when illustrating that the electric equipment of the power supplier possessing execution mode 2 transfers to usual operate condition from holding state.
(a) ~ (d) of Fig. 5 is the timing waveform of the change case of the signal of control switch circuit when illustrating that the electric equipment of the power supplier possessing execution mode 2 transfers to holding state from usual operate condition.
(a) ~ (d) of Fig. 6 is the timing waveform of the different examples of the change of the signal of control switch circuit when illustrating that the electric equipment of the power supplier possessing execution mode 2 transfers to usual operate condition from holding state.
(a) ~ (d) of Fig. 7 is the timing waveform of the different examples of the change of the signal of control switch circuit when illustrating that the electric equipment of the power supplier possessing execution mode 2 transfers to holding state from usual operate condition.
Label declaration
2: electric equipment; 4: AC power; 6: load circuit; 8: power supply opening and closing signal input unit; 10: power supplier; 13: diode bridge; 14: capacitor; 16: starting voltage resistor; 18: switch transformer; 21: the 1 switching circuits; 22: the 2 switching circuits; 24: switching power source control circuit; 26: switch element; 28: diode; 29: capacitor; 31: diode; 32: capacitor; 36: diode; 38: electrical storage device; 40: readiness control circuit; 44: the 1 rectification circuits; 46: the 2 rectification circuits (load voltage generation rectification circuit); 48: the 3 rectification circuits (driving voltage generation rectification circuit); 50: Switching Power Supply; 52: AC power rise detection circuit; 60: readiness control circuit; 61: action decision-making circuit; 62: timing decision-making circuit; R1 ~ R7: resistor; C1: capacitor; Tr1 ~ Tr3: transistor; Pmr: photoelectricity MOS relay.
Embodiment
Execution mode 1
The power supplier 10 of embodiments of the present invention 1 together illustrates with AC power 4, load circuit 6 and power supply opening and closing signal input unit 8 by Fig. 1.
Power supplier 10 shown in Fig. 1 forms a part for electric equipment 2, and the power supply received from the AC power 4 of outside supplies, and provides direct voltage to each several part of electric equipment 2.Load circuit 6 is expressed as by receiving the part supplied from the power supply of power supplier 10 in Fig. 1.Further, the signal about power supply opening and closing is inputted from the power supply opening and closing signal input unit 8 of electric equipment 2 to power supplier 10.
Power supplier 10 is made up of Switching Power Supply, has diode bridge 13, capacitor 14, starting voltage resistor 16, switch transformer 18, the 1st switching circuit 21, the 2nd switching circuit 22, switching power source control circuit 24, switch element 26, diode 28, capacitor 29, diode 31, capacitor 32, diode 36, electrical storage device 38 and readiness control circuit 40.
Switch transformer 18 has winding 18a, a secondary winding 18b and drives winding 18c.
A pair AC terminal of diode bridge 13 is connected with AC power 4, and the rise detection terminal 22p1 of the positive terminal of positive terminal 13a and capacitor 14, starting voltage one end (the 1st terminal) 16a of resistor 16, the 1st terminal 18aa of a winding 18a of switch transformer 18, rising (on vertical Chi Ga り) the detection terminal 21p1 of the 1st switching circuit 21 and the 2nd switching circuit 22 is connected.
The starting voltage other end (the 2nd terminal) 16b of resistor 16 is connected with the input terminal 21i of the 1st switching circuit 21.
The lead-out terminal 21o of the 1st switching circuit 21 is connected with the starting voltage input terminal 24a of switching power source control circuit 24.
The 2nd terminal 18ab of a winding 18a of switch transformer 18 is connected with the 1st terminal 26a of switch element 26.
The 1st terminal 18ca of the driving winding 18c of switch transformer 18 is connected with the anode of diode 28, and the negative electrode of diode 28 is connected with the input terminal 22i of the positive terminal of capacitor 29 and the 2nd switching circuit 22.
The lead-out terminal 22o of the 2nd switching circuit 22 is connected with the driving voltage input terminal 24b of switching power source control circuit 24.
The sub-24c in control output end of switching power source control circuit 24 is connected with the control terminal 26c of switch element 26.
Switch element 26 is such as made up of FET, and its gate terminal forms control terminal 26c.
1st earth terminal 22g1 of the 2nd terminal 26b of the negative terminal 13b of diode bridge 13, the negative terminal of capacitor 14, switch element 26, the 2nd terminal 18cb of driving winding 18c, the negative terminal of capacitor 29, the 1st earth terminal 21g1 of the 1st switching circuit 21 and the 2nd switching circuit 22 is connected with power circuit primary side ground connection GD1.
The 1st terminal 18ba of the secondary winding 18b of switch transformer 18 is connected with the anode of diode 31, and the negative electrode of diode 31 is connected with the anode of the positive terminal of capacitor 32, load circuit 6 and diode 36.
The power input terminal 8p of power input terminal 40p, the power input terminal 21p2 of the 1st switching circuit 21 of the negative electrode of diode 36 and the positive terminal of electrical storage device 38, readiness control circuit 40, the power input terminal 22p2 of the 2nd switching circuit 22 and power supply opening and closing signal input unit 8 is connected.
Readiness control circuit 40 receives order from power supply opening and closing signal input unit 8.
The control signal lead-out terminal 40c of readiness control circuit 40 is connected with the control signal input terminal 22c of the control signal input terminal 21c of the 1st switching circuit 21 and the 2nd switching circuit 22.
2nd earth terminal 22g2 of the 2nd terminal 18bb of secondary winding 18b, the negative terminal of capacitor 32, the negative terminal of electrical storage device 38, the 2nd earth terminal 21g2 of the 1st switching circuit 21 and the 2nd switching circuit 22 is connected with power circuit secondary side ground connection GD2.
Utilize diode bridge 13 and capacitor 14 to form to carry out rectification to the alternating voltage from AC power 4 and make its smoothing and export the 1st rectification circuit 44 of commutating voltage V44.
Utilize diode 31 and capacitor 32 to form to carry out rectification to the alternating voltage from secondary winding 18b and make its smoothing and produce the 2nd rectification circuit (load voltage generation rectification circuit) 46 of load voltage V46.
Utilize diode 28 and capacitor 29 to form carry out rectification to carrying out the alternating voltage of self-driven winding 18c and make its smoothing and produce the 3rd rectification circuit (driving voltage generation rectification circuit) 48 of driving voltage V48.
By based on the rectification of the 1st rectification circuit 44 and smoothing and direct voltage (the 1st commutating voltage) V44 produced is imported into a winding 18a of switch transformer 18, carry out switch control rule by switch element 26.
Thus, the alternating voltage that the secondary winding 18b of switch transformer 18 responds to is carried out rectification from the 2nd rectification circuit 46 and is made its smoothing and become direct voltage, and it can be used as load voltage V46 to be supplied to load circuit 6.
Load circuit 6 is the devices such as carrying out the process for show image, in this case, forms image display by the electric equipment 2 comprising load circuit 6 and power supplier 10.
The direct voltage V46 exported from the 2nd rectification circuit 46 is provided to electrical storage device 38 via diode 36, stores electric power by electrical storage device 38.
Electrical storage device 38 is such as made up of double charge layer capacitor.
The electric power be stored in electrical storage device 38 is provided to readiness control circuit 40, the 1st switching circuit 21, the 2nd switching circuit 22 and power supply opening and closing signal input unit 8.
Switch element 26 is controlled by switching power source control circuit 24 and carries out switch motion.
As mentioned above, switching power source control circuit 24 has starting voltage input terminal 24a and driving voltage input terminal 24b.
The commutating voltage V44 exported from the 1st rectification circuit 44 is applied to starting voltage input terminal 24a via starting voltage resistor 16 and the 1st switching circuit 21 as starting voltage.
The direct voltage V48 exported from the 3rd rectification circuit 48 is applied to driving voltage input terminal 24b via the 2nd switching circuit 22 as driving voltage.
The driving voltage V48 provided from the 3rd rectification circuit 48 is lower than the starting voltage provided from the 1st rectification circuit 44.
When voltage from AC power 1 supplies, utilize voltage V44 to make switching power source control circuit 24 start action, in order to proceed the action that started and utilize voltage V48.Namely, when starting to carry out voltage supply from AC power 4, supplying the change in voltage that starts to bring accordingly with this voltage, in switching power source control circuit 24, temporarily producing the voltage of electronegative potential, small area analysis, thus, the on/off control to switch element 26 is started.This result is, the starting of oscillation of Switching Power Supply.
After this starting of oscillation, carry out rectification by the voltage responded to the driving winding 18c of switch transformer 18 and the voltage of the stable electronegative potential obtained, big current, make switching power source control circuit 24 proceed on/off control.
Because voltage V44 is high potential, therefore hypothesis will generate according to commutating voltage V44 the electric power making switching power source control circuit 24 carry out electronegative potential required for operating stably, big current, then need this Switching Power Supply of further additional image dc-dc, and because the number of components of this structure is more, cost is higher, therefore, weigh its purposes, and inappropriate.In the present invention, voltage V44 is supplied to switching power circuit 24 via starting voltage resistor 16, therefore, it is possible to do not use complicated circuit, namely starts with simple circuit realiration.
The state of the 1st switching circuit 21 and the 2nd switching circuit 22 is controlled by the control signal D40 from readiness control circuit 40.
Control signal D40 makes switching circuit 21,22 for on-state (short-circuit condition) when the 1st state such as high level, make switching circuit 21,22 be off state (open-circuit condition) when the 2nd state such as low level.
Like this, control signal D40 plays a role as the control signal for making switching circuit 21,22 connect when the 1st state, when the 2nd state, plays a role as the control signal for making switching circuit 21,22 disconnect.
The order D8w of input instruction " transferring to holding state from usual operate condition " from power supply opening and closing signal input unit 8 to the readiness control circuit 40 and order D8n of instruction " transferring to usual operate condition from holding state ".
By when indicating the order D8w of " transferring to holding state from usual operate condition " to be input to readiness control circuit 40 from power supply opening and closing signal input unit 8, readiness control circuit 40 is off state to make the 1st switching circuit 21 and the 2nd switching circuit 22, and makes control signal D40 be the 2nd state (exporting the control signal for being off-state).
When the 1st switching circuit 21 and the 2nd switching circuit 22 become off-state, any one in starting voltage input terminal 24a in switching power source control circuit 24 and driving voltage input terminal 24b is all no longer provided voltage, switching power source control circuit 24 stops action, does not drive (on/off control) switch element 26.Therefore, except not having current flowing from AC power 4 except the leakage current of diode bridge 13 and commutation condenser 14, its result is, inhibits the power consumption of the electric equipment 2 of holding state significantly.
When electric equipment 2 is holding state, readiness control circuit 40 is supplied by the electric power from electrical storage device 38, continues to control the 1st switching circuit 21 and the 2nd switching circuit 22.
Such as, readiness control circuit 40 has the function monitored the magnitude of voltage provided from electrical storage device 38, because the magnitude of voltage provided from electrical storage device 38 when charge capacity reduces also reduces, therefore, by above-mentioned function for monitoring, detect the reduction of this magnitude of voltage, readiness control circuit 40 temporarily makes the 1st switching circuit 21 and the 2nd switching circuit 22 make Switching Power Supply action for on-state, and make its action for charge to electrical storage device 38, can continue thus to control the 1st switching circuit 21 and the 2nd switching circuit 22.
Then by when indicating the order D8n of " transferring to usual operate condition from standby operate condition " to be input to readiness control circuit 40 from power supply opening and closing signal input unit 8, readiness control circuit 40 in order to make the 1st switching circuit 21 and the 2nd switching circuit 22 be on-state, and makes control signal D40 be the 1st state (exporting for making switching circuit be the control signal of on-state).
When the 1st switching circuit 21 becomes on-state, the starting voltage input terminal 24a of switching power source control circuit 24 is transfused to starting voltage, and switching power source control circuit 24 starts to carry out on/off control to switch element 26.And, when the 2nd switching circuit 22 becomes on-state, driving voltage is imported into driving voltage input terminal 24b, switching power source control circuit 24 utilizes driving voltage and carries out action, become the state that can continue switch element 26 to be carried out on/off control, Switching Power Supply continues action, and electric equipment 2 becomes usual operate condition.
Fig. 2 illustrates the example that can be used as the switching circuit of the switching circuit 21,22 of Fig. 1.Illustrated circuit is configured to make switch element to be usually when non-input control signal (when namely control signal is low level or) off-state, if use this circuit, then, when electric equipment 2 is holding state, power consumption can be made less.
When the switching circuit of Fig. 2 is used as the 1st switching circuit 21 of Fig. 1, rise detection terminal Vp1, power input terminal Vp2, and control signal input terminal Ct forms the rise detection terminal 21p1 of the 1st switching circuit 21 respectively, power input terminal 21p2, and control signal input terminal 21c, and the commutating voltage V44 they connected for receiving Fig. 1 respectively, storage voltage V38 and control signal D40, input terminal Si and lead-out terminal So forms input terminal 21i and the lead-out terminal 21o of the 1st switching circuit 21 respectively, and respectively with the starting voltage of Fig. 1 the 2nd terminal 16b with resistor 16, and the starting voltage input terminal 24a of switching power source control circuit 24 connects.
When the switching circuit of Fig. 2 is used as the 2nd switching circuit 22 of Fig. 1, rise detection terminal Vp1, power input terminal Vp2 and control signal input terminal Ct forms the rise detection terminal 22p1 of the 2nd switching circuit 22 respectively, power input terminal 22p2 and control signal input terminal 22c, and the commutating voltage V44 they connected for receiving Fig. 1 respectively, storage voltage V38 and control signal D40, input terminal Si and lead-out terminal So forms input terminal 22i and the lead-out terminal 22o of the 2nd switching circuit 22 respectively, and respectively with the negative electrode of the diode 28 of Fig. 1, and the driving voltage input terminal 24b of switching power source control circuit 24 connects.
The main switch element (carrying out the switch element of opening and closing between input terminal Si, lead-out terminal So) of the switching circuit shown in Fig. 2 is made up of PNP transistor Tr1.The emitter of transistor Tr1 is connected with input terminal Si, and collector electrode is connected with lead-out terminal So.
One end of resistor R1 is connected with power input terminal Vp2 (being connected to the output voltage V38 receiving electrical storage device 38), and the other end of resistor device R1 is connected with the anode of the light-emitting diode Ld of PhotoMOS relay Pmr.
The negative electrode of light-emitting diode Ld is connected with the collector electrode of NPN transistor Tr2, and the emitter of transistor Tr2 is connected with power circuit secondary side ground connection GD2.
One end of resistor R2 is connected with control signal input terminal Ct (being transfused to control signal D40 from readiness control circuit 40), and the other end of resistor R2 is connected with the base stage of transistor Tr2.
The base stage of transistor Tr1 is connected with one end of resistor R3, and the other end of resistor R3 is connected with the 1st terminals P ta of the MOS switch element Pt of PhotoMOS relay Pmr, and the 2nd terminals P tb of MOS switch element Pt is connected with power circuit primary side ground connection GD1.
As PhotoMOS relay Pmr, use has the MOS switch element Pt when electric current does not flow into light-emitting diode Ld and is off the element of the characteristic of state.
One end of resistor R4 is connected with input terminal Si, and the other end is connected with the base stage of transistor Tr1.
One end of resistor R5 is connected with the base stage of transistor Tr1, and therefore, be connected with the other end of resistor R4, the other end of resistor R5 is connected with the collector electrode of NPN transistor Tr3.
The emitter of transistor Tr3 is connected with power circuit primary side ground connection GD1.
One end of capacitor C1 is connected with rise detection terminal Vp1 (being connected to the commutating voltage V44 receiving Fig. 1), and the other end of capacitor C1 is connected with one end of resistor R6, and the other end of resistor R6 is connected with the base stage of transistor Tr3.
One end of resistor R7 is connected with the base stage of transistor Tr3, therefore, is connected with the other end of resistor R6, and the other end of resistor R7 is connected with power circuit primary side ground connection GD1.
AC power rise detection circuit 52 is made up of capacitor C1, resistor R6 and R7 and transistor Tr3.AC power rise detection circuit 52 detects the rising (on vertical Chi Ga り) of AC power 4, the base potential of transistor Tr1 is reduced, makes transistor Tr1 become conducting state.
Resistor R6, R7 of rise detection circuit 52 cooperate with starting voltage resistor 16 and carry out dividing potential drop to voltage V44, and voltage is supplied to the base stage of transistor Tr3.But, capacitor C1 is inserted with, therefore, as long as voltage V44 does not change owing to connecting between the positive terminal 13a and the base stage of transistor Tr3 of diode bridge 13, the base stage of transistor Tr3 and emitter are equipotentials, are also cut-off state between the collector electrode-emitter of transistor Tr3.
About PhotoMOS relay Pmr, due to when control signal D40 is low level or non-input control signal D40 time MOS switch element Pt be off-state, therefore the base stage of transistor Tr1 and emitter are equipotentials, and the emitter-inter-collector of transistor Tr1 is cut-off state.
As the order D8n " transferring to usual operate condition from holding state " according to the instruction from power supply opening and closing signal input unit 8, when becoming the 1st state (high level) from the control signal D40 of readiness control circuit 40 output, form the control input terminal 21c of switching circuit 21,22, the control input terminal Ct of 22c and become high level, transistor Tr2 becomes conducting state.
When transistor Tr2 becomes conducting state, electric current flows to the light-emitting diode Ld of PhotoMOS relay Pmr from electrical storage device 38.
When electric current flows through light-emitting diode Ld, the MOS switch element Pt of PhotoMOS relay Pmr becomes on-state.So the base potential of transistor Tr1 becomes also lower than emitter current potential, and transistor Tr1 becomes conducting state.
By this action, the 1st switching circuit 21 be made up of the switching circuit of Fig. 2 and the 2nd switching circuit 22 become on-state, apply starting voltage and driving voltage to switching power source control circuit 24, Switching Power Supply starts action, and electric equipment 2 becomes usual operate condition.
As the order D8w " transferring to holding state from usual operate condition " according to the instruction from power supply opening and closing signal input unit 8, when becoming the 2nd state (low level z) from the control signal D40 of readiness control circuit 40 output, form the control input terminal 21c of switching circuit 21,22, the control input terminal Ct of 22c and become high level, transistor Tr2 becomes cut-off state.
When transistor Tr2 becomes cut-off state, electric current will not flow to the light-emitting diode Ld of PhotoMOS relay Pmr, and the MOS switch element Pt of PhotoMOS relay Pmr becomes cut-off state.
So base potential and the emitter current potential of transistor Tr1 become equipotential, and the emitter-inter-collector of transistor Tr1 becomes cut-off state.
By this action, the 1st switching circuit 21 and the 2nd switching circuit 22 become off-state, no longer apply starting voltage and driving voltage to switching power source control circuit 24, and Switching Power Supply stops action, and electric equipment 2 becomes holding state.
When this holding state, owing to not having electric current to flow into switching circuit 21,22 from electrical storage device 38, switching circuit 21,22 is controlled as off-state, therefore, it is possible to make the electric power retention time of electrical storage device 38 become longer, power consumption becomes less.
By arranging AC power rise detection circuit 52, the 1st switching circuit 21 can be made, the power consumption of the 2nd switching circuit 22 becomes less.
Such as, are the new products be not also connected with AC power 4 at electric equipment 2, or when making electrical storage device 38 discharge owing to having a power failure for a long time, electrical storage device 38 is in uncharged state or undercharge state.If do not arrange AC power rise detection circuit 52, even if then electric equipment 2 is connected with AC power 4, electrical storage device 38 does not also provide electric power, and readiness control circuit 40 can not export control signal D40 (being high level).Its result is that electric equipment 2 " can not transfer to usual operate condition from holding state ".
When being provided with AC power rise detection circuit 52, when electric equipment 2 is connected with AC power 4, during make capacitor C1 charge by making commutating voltage V44 rise, current flows through resistor R6, R7, transistor Tr3 becomes conducting state.So the base potential of transistor Tr1 becomes also lower than emitter current potential, and the state of transistor Tr1 and PhotoMOS relay Pmr independently becomes conducting state.
Like this, the 1st switching circuit 21 be made up of the switching circuit of Fig. 2 and the 2nd switching circuit 22 all become on-state, and switching power source control circuit 24 is applied in starting voltage and driving voltage.Its result is, Switching Power Supply starts action, charging device 38 is charged, readiness control circuit 40 is provided supply voltage, then, readiness control circuit 40 becomes can export control signal D40 (being high level), and its result is for can stably control the 1st switching circuit 21 and the 2nd switching circuit 22.
Above-mentioned AC power rise detection circuit 52 is connected with the node (starting voltage the 2nd terminal 16b of resistor 16) being provided commutating voltage V44, as long as but the link position of AC power rise detection circuit 52 according to the voltage input from AC power 4 node that current potential is changed, even the node beyond the node being provided commutating voltage V44 is also harmless.
And, transistor Tr1, Tr2, Tr3 etc. of Fig. 2 can not be bipolar transistors, but other switch element, also can be such as FET, control electric current can be cut down further by selector switch element, its result is, can obtain the effect of the power consumption of cutting down under the usual operate condition of electric equipment 2.Such as, as long as use P channel MOSFET to carry out alternative transistor Tr1, use N channel MOSFET to come alternative transistor Tr2, Tr3, just can cut down the electric current flowed in the case of a bipolar transistor.
Further, in the above-described embodiment, use PhotoMOS relay to form and can carry out element that is electrically separated, transmission signal, but, also can replace, use the photoelectrical coupler comprising phototransistor.
In addition, one or both that also can make in the 1st switching circuit 21 and the 2nd switching circuit 22 is configured to usual on-state (being on-state when not providing control signal or control signal D40 is low level).In this case, AC power rise detection circuit 52 can be omitted.
On the other hand, when electric equipment 2 is holding state, need to make switching circuit remain open the control electric current of state, therefore, compare when being configured to making the 1st switching circuit 21 and the 2nd switching circuit 22 state usually disconnected, even the retention time of the electric power of the electrical storage device 38 under the holding state of electric equipment 2 is shorter, but such structure, also can obtain the effect that can suppress power consumption by stopping the Switching Power Supply of the electric equipment 2 of holding state.
Execution mode 2
Fig. 3 illustrates the power supplier 10 of embodiments of the present invention 2.
The power supplier 10 of Fig. 3 is roughly the same with the power supplier 10 of Fig. 1, but is provided with readiness control circuit 60 to replace the readiness control circuit 40 of Fig. 1.
Readiness control circuit 60 is different from readiness control circuit 40 in following: readiness control circuit 60 exports for the 1st and the 2nd switching circuit 21,22 independently the 1st and the 2nd control signal D60a, D60b.
The readiness control circuit 60 of Fig. 3 has action decision-making circuit 61 and timing decision-making circuit 62.
The order D8w that action decision-making circuit 61 " transfers to holding state from usual operate condition " according to the instruction from power supply opening and closing the signal input unit 8 and order D8n that instruction " transfers to usual operate condition from holding state ", decision makes switching circuit 21,22 connect or disconnects, and output action index signal D61.
Action index signal D61 can choose any one in such as the 1st state such as high level and the 2nd state such as low level, when the 1st state, represent and make electric equipment transfer to usual operate condition, and switching circuit 21,22 should be made for on-state, when the 2nd state, represent and make electric equipment transfer to holding state and switching circuit 21,22 should be made to be off state.Like this, action index signal D61 makes switching circuit 21,22 be that the action index signal of on-state plays a role when the 1st state as instruction, and the action index signal making switching circuit 21,22 be off state as instruction when the 2nd state plays a role.
Timing decision-making circuit 62 is according to the state of action index signal D61 switch-over control signal D60a, D60b.Control signal D60a, D60b, when the 1st state such as high level, make switching circuit 21,22 connect respectively, when the 2nd state such as low level, make switching circuit 21,22 disconnect respectively.Control signal D60a, D60b are signals independent of each other, and its timing of rising and declining also is controlled independently.Therefore, the on-off action of switching circuit 21,22 is also controlled independently.
Like this, during each comfortable 1st state of control signal D60a, D60b, playing a role as the control signal for making corresponding switching circuit connect, when the 2nd state, playing a role as the control signal for making corresponding switching circuit disconnect.
When have input the order D8w that instruction " transfers to holding state from usual operate condition " from power supply opening and closing signal input unit 8, action decision-making circuit 61 make action index signal D61 be the 2nd state (namely, export the signal representing and switching circuit 21,22 should be made to disconnect), timing decision-making circuit 62 becomes the situation of the 2nd state according to action index signal D61, control signal D60a, D60b are switched to the 2nd state (low level).This timing switched to low level can determine with being independently of each other, and thus, the 1st switching circuit 21 and the 2nd switching circuit 22 are independently regularly becoming off-state.
When indicating the order D8n of " transferring to usual operate condition from standby operate condition " from the input of power supply opening and closing signal input unit 8, action decision-making circuit 61 make action index signal D61 be the 1st state (namely, export the signal representing and make switching circuit 21,22 connect), timing decision-making circuit 62 becomes the situation of the 1st state according to action index signal D61, control signal D60a, D60b are switched to the 1st state (high level).This timing switched to high level can determine with being independently of each other, and thus, the 1st switching circuit 21 and the 2nd switching circuit 22 are independently regularly becoming on-state.
Switching circuit 21,22 as Fig. 3 also can use the switching circuit shown in Fig. 2 separately.
When use the switching circuit shown in Fig. 2 as Fig. 3 switching circuit 21,1st control signal D60a is supplied to the control signal input terminal Ct of Fig. 2, when use the switching circuit shown in Fig. 2 as Fig. 3 switching circuit 22, the 2nd control signal D60b is supplied to the control signal input terminal Ct of Fig. 2.
In other than the above, the connection of switching circuit is identical with the content described in execution mode 1.
(a) ~ (d) of Fig. 4 illustrates in embodiments of the present invention 2, when making electric equipment 2 " transferring to usual operate condition from holding state " (making Switching Power Supply transfer to operate condition from halted state), driven circuit 61 of making decision be input to timing decision-making circuit 62 action index signal D61, be input to from timing decision-making circuit 62 the 1st switching circuit 21 control signal D60a and be input to the control signal D60b of the 2nd switching circuit 22 and the state of electric equipment 2 from timing decision-making circuit 62.
As mentioned above, the voltage V44 obtained by carrying out rectification to the voltage from AC power 4 when starting power supply supply receives as starting voltage by switching power source control circuit 24, detect it to rise, start to carry out on/off control to switch element 26, then, voltage V48 is received as driving voltage, proceeds bistable action.
Because the starting voltage of switching power source control circuit 24 and driving voltage have difference as above, therefore when making electric equipment 2 " transferring to usual operate condition from holding state " (making Switching Power Supply transfer to operate condition from halted state), if do not control to apply driving voltage immediately after applying starting voltage to switching power source control circuit 24, then not only can not make electric equipment 2 " transferring to usual operate condition from holding state ", and make the big current of driving flow to starting voltage input terminal 24a, likely give switching power source control circuit 24, switch element 26, starting voltage input terminal 24a, and starting voltage resistor 16 causes damage.
And when inputting from power supply opening and closing input unit 8 the order D8n that instruction makes electric equipment 2 " transferring to usual operate condition from holding state ", action decision-making circuit 61 exports expression should make switching circuit 21, during 22 signal that is on-state (as shown in (a) of Fig. 4, when moment t11, when making action index signal D61 be the 1st state (high level)), timing decision-making circuit 62 makes the 2nd control signal D60b become the 1st state (as shown in (c) of Fig. 4, high level is become from low level) at moment t12, thus, the 2nd switching circuit 22 is made to be on-state, thus, can start immediately to provide driving voltage.
Timing decision-making circuit 62 is then in order to make the 1st switching circuit 21 for on-state, the 1st control signal D60a is made to become the 1st state (as shown in (b) of Fig. 4, high level is become from low level at moment t13), thereby, it is possible to provide starting voltage.
Form action decision-making circuit 61 and timing decision-making circuit 62 as shown in Figure 3, control signal D60a can be made by the timing shown in (a) ~ (c) of Fig. 4, D60b becomes high level, and suitably control the 1st switching circuit 21 and the 2nd switching circuit 22, cause damage can not to switching power source control circuit 24, switch element 26, starting voltage input terminal 24a and starting voltage resistor 16, and make electric equipment 2 " transferring to usual operate condition from holding state ".
In addition, when using the switching circuit of Fig. 2, the polarity of the signal of (a) ~ (c) of Fig. 4 is suitable, about the polarity of signal, need to make it be changed to the structure of the switching circuit of realistic upper application, the present invention is not limited to the polarity of the signal shown in (a) ~ (c) of Fig. 4.Just, when changing signal polarity, the content that the change order of signal level, timing should illustrate with (a) ~ (c) with reference to Fig. 4 is identical.
In embodiments of the present invention 2, when making electric equipment 2 " transferring to holding state from usual operate condition " (making Switching Power Supply from action state transitions to halted state), (a) ~ (c) of Fig. 5 illustrate driven circuit 61 of making decision be input to timing decision-making circuit 62 action index signal D61, be input to from timing decision-making circuit 62 the 1st switching circuit 21 control signal D60a and be input to the control signal D60b of the 2nd switching circuit 22 and the state of electric equipment 2 from timing decision-making circuit 62.
As mentioned above, the voltage V44 obtained by carrying out rectification to the voltage from AC power 4 when starting power supply supply receives as starting voltage by switching power source control circuit 24, detect it to rise, start to carry out on/off control to switch element 26, then, voltage V48 is received as driving voltage, proceeds bistable action.
Because the starting voltage of switching power source control circuit 24 and driving voltage have difference as above, therefore when making electric equipment 2 " transferring to holding state from usual operate condition " (making Switching Power Supply from action state transitions to halted state), if do not control as stopping input queued switches voltage in stopping after switching power source control circuit 24 inputs starting voltage, then continuation is maintained usual operate condition by Switching Power Supply, and make big current flow to starting voltage input terminal 24a, likely give switching power source control circuit 24, switch element 26, starting voltage input terminal 24a, and starting voltage resistor 16 causes damage.
And when being used for from the input of power supply opening and closing input unit 8 the order D8w making electric equipment 2 " transferring to holding state from usual operate condition ", action decision-making circuit 61 exports expression should make switching circuit 21, 22 when being off the signal of state (as shown in (a) of Fig. 5, action index signal D61 is made to be the 2nd state (low level) at moment t21), timing decision-making circuit 62 is first in order to make the 1st switching circuit 21 be off state, and make the 1st control signal D60a be that the 2nd state is (as shown in (b) of Fig. 5, control signal D60a is made to become low level from high level at moment t22), thus, stop supply starting voltage.
Timing decision-making circuit 62 is then in order to make the 2nd switching circuit 22 be off state, and make the 2nd control signal D60b become the 2nd state (as shown in (c) of Fig. 5, control signal D60b is made to become low level from high level at moment t23), thus, stop supply driving voltage.
Form action decision-making circuit 61 and timing decision-making circuit 62 as shown in Figure 3, timing shown in (a) ~ (c) of Fig. 5 makes control signal D60a, D60b becomes low level, thus, can suitably control the 1st switching circuit 21 and the 2nd switching circuit 22, cause damage can not to switching power source control circuit 24, switch element 26, starting voltage input terminal 24a and starting voltage resistor 16, and make electric equipment 2 " transferring to holding state from usual operate condition ".
In addition, when using the switching circuit of Fig. 2, the polarity of the signal of (a) ~ (c) of Fig. 5 is suitable, about the polarity of signal, need to make it change accordingly with the structure of the switching circuit in fact applied, the present invention is not limited to the polarity of the signal shown in (a) ~ (c) of Fig. 5.Just, when changing signal polarity, change order, the timing of signal level should be identical with the content illustrated with reference to Fig. 5 (a) ~ (c).
(a) ~ (d) of Fig. 6 illustrates in embodiments of the present invention 2, when making electric equipment 2 " transferring to usual operate condition from holding state " (making Switching Power Supply transfer to operate condition from halted state), driven circuit 61 of making decision be input to timing decision-making circuit 62 action index signal D61, be input to from timing decision-making circuit 62 the 1st switching circuit 21 control signal D60a and be input to the control signal D60b of the 2nd switching circuit 22 and the state of electric equipment 2 from timing decision-making circuit 62.
As mentioned above, the voltage V44 obtained by carrying out rectification to the voltage from AC power 4 when starting power supply supply receives as starting voltage by switching power source control circuit 24, detect it to rise, start to carry out on/off control to switch element 26, then, voltage V48 is received as driving voltage, proceeds bistable action.
Because the starting voltage of switching power source control circuit 24 and driving voltage exist difference as above, therefore, when making electric equipment 2 " transferring to usual operate condition from holding state " (making Switching Power Supply transfer to operate condition from halted state), if do not control to apply driving voltage immediately after applying starting voltage to switching power source control circuit 24, then not only can not make electric equipment 2 " transferring to usual operate condition from holding state ", and make the big current of driving flow to starting voltage input terminal 24a, likely give switching power source control circuit 24, switch element 26, starting voltage input terminal 24a, and starting voltage resistor 16 causes damage.
And when being used for from the input of power supply opening and closing input unit 8 the order D8n making electric equipment 2 " transferring to usual operate condition from holding state ", action decision-making circuit 61 exports expression should make switching circuit 21, during 22 signal that is on-state (as shown in (a) of Fig. 6, control index signal D61 is made to be the 1st state (high level) at moment t11), first timing decision-making circuit 62 makes the 2nd control signal D60b become the 1st state (as shown in (c) of Fig. 6, high level is become from low level) at moment t12, thus, the 2nd switching circuit 22 is made to be on-state, thus, can start immediately to supply driving voltage.
Then, timing decision-making circuit 62 makes the 1st control signal D60a become the 1st state (as shown in (b) of Fig. 6, high level is become from low level) at moment t13, thus, the 1st switching circuit 21 is made to be on-state, thereby, it is possible to provide starting voltage to switching power source control circuit 24.
By this action, bring infringement can not to switching power source control circuit 24, switch element 26, starting voltage input terminal 24a and starting voltage resistor 16, and make electric equipment 2 " transferring to usual operate condition from holding state ".
After have passed through the stipulated time becoming usual operate condition from electric equipment 2, at moment t14, timing decision-making circuit 62 makes control signal D60a become low level ((b) of Fig. 6), makes switching circuit 21 be off state.Thus, no longer input starting voltage to switching power source control circuit 24, but owing to starting supply driving voltage, therefore, switching power source control circuit 24 continues to maintain usual operate condition.In this condition, flow to starting voltage resistor 16 owing to no longer including electric current from commutating voltage V44, the control signal being supplied to the 1st switching circuit 21 becomes low level, therefore also obtains the effect suppressed the power consumption of the electric equipment 2 of usual operate condition.
Form action decision-making circuit 61 and timing decision-making circuit 62 as shown in Figure 3, the state variation of control signal D60a, D60b is made by the timing shown in (a) ~ (c) of Fig. 6, thus except obtaining the effect identical with the situation of the generation control signal shown in (a) ~ (c) of such as Fig. 4, also can obtain the effect of the power consumption of the electric equipment 2 that can reduce usual operate condition further.
Shown in (a) ~ (c) of such as Fig. 6, control signal D60a, D60b are changed, and when making electric equipment 2 transfer to usual operate condition, when from this state transitions to holding state, driven circuit 61 of making decision be input to timing decision-making circuit 62 action index signal D61, be input to from timing decision-making circuit 62 the 1st switching circuit 21 control signal D60a and be input to the change of the control signal D60b of the 2nd switching circuit 22 and the state of electric equipment 2 as shown in (a) ~ (d) of Fig. 7 from timing decision-making circuit 62.
Namely, as shown in (a) of Fig. 7, from the control index signal D61 of action decision-making circuit 61 after the moment, t21 became low level, timing decision-making circuit 62 makes the 2nd switching circuit 22 be off state by the 2nd control signal D60b is switched to low level, thus, stop to switching power source control circuit 24 input queued switches voltage ((c) of Fig. 7) at moment t23.That is, as shown in (b) of Fig. 7, control signal D60a is in low state as shown in (b) of Fig. 7, owing to not being applied in starting voltage, as long as therefore maintain this state.
As mentioned above, according to execution mode 2, except the advantage illustrated by execution mode 1, also there is the additional advantage that control signal D60a, D60b for the 1st and the 2nd switching circuit 21,22 are brought independently of one another.
Execution mode 1 is described and may have various distortion, execution mode 2 also can be made to carry out same distortion.
Claims (10)
1. a power supplier, is characterized in that,
Described power supplier has:
1st rectification circuit, it carries out rectification to the alternating voltage from AC power and exports the 1st commutating voltage;
Switch transformer, it has the winding and secondary winding and driving winding that are provided described 1st commutating voltage;
2nd rectification circuit, it carries out rectification to the alternating voltage exported from described secondary winding and exports the 2nd commutating voltage;
Electrical storage device, described 2nd commutating voltage is carried out electric power storage as input by it, and output dc voltage;
Readiness control circuit, its with the direct voltage exported from described electrical storage device for power supply carries out action;
3rd rectification circuit, it carries out rectification to the alternating voltage exported from described driving winding and exports the 3rd commutating voltage;
Switch element, it turns on/off the electric current flowing through a described winding;
Switching power source control circuit, it has starting voltage input terminal and driving voltage input terminal, carries out on/off control to described switch element;
1st switching circuit, its on/off is for the applying of described 1st commutating voltage of described starting voltage input terminal; And
2nd switching circuit, it turns on/off the applying for described 3rd commutating voltage of described driving voltage input terminal,
Described switching power source control circuit according to be provided to described starting voltage input terminal described 1st commutating voltage rising and start to carry out the control action for described switch element, to described 3rd commutating voltage of described driving voltage input terminal be supplied to as power supply, proceed the control action for described switch element
The ON/OFF state of described readiness control circuit to described 1st switching circuit and described 2nd switching circuit controls, and by connecting described 1st switching circuit, described 1st commutating voltage is applied to described starting voltage input terminal as starting voltage,
By connecting described 2nd switching circuit, described 3rd commutating voltage is applied to described driving voltage input terminal as driving voltage.
2. power supplier according to claim 1, is characterized in that,
Described 1st switching circuit and described 2nd switching circuit have separately:
Switch element; And
Rise detection circuit, it detects the rising of the voltage of described AC power,
When described rise detection circuit detects the rising of the voltage of described AC power, described switch element is controlled as on-state.
3. power supplier according to claim 1, is characterized in that,
Described 1st commutating voltage is applied to described starting voltage input terminal via starting voltage resistor.
4. the power supplier according to any one in claims 1 to 3, is characterized in that,
Described 1st switching circuit and described 2nd switching circuit are configured to respectively, become off-state when the control signal for controlling this switching circuit is low level.
5. the power supplier according to any one in claims 1 to 3, is characterized in that,
Described readiness control circuit output the 1st control signal independent of each other and the 2nd control signal are as the control signal for controlling described 1st switching circuit and described 2nd switching circuit.
6. power supplier according to claim 5, is characterized in that,
Described readiness control circuit has:
Action decision-making circuit, it receives the order from power supply opening and closing signal input unit and determines the content of control; And
Timing decision-making circuit, it receives the decision of described action decision-making circuit and exports described 1st control signal and described 2nd control signal.
7. power supplier according to claim 6, is characterized in that,
When starting to apply described starting voltage and described driving voltage to the described starting voltage input terminal of described switching power source control circuit and described driving voltage input terminal, first described timing decision-making circuit makes after described 2nd switching circuit becomes on-state, then to make described 1st switching circuit become on-state.
8. power supplier according to claim 6, is characterized in that,
When stopping applying described starting voltage and described driving voltage to the described starting voltage input terminal of described switching power source control circuit and described driving voltage input terminal, first described timing decision-making circuit makes described 1st switching circuit become off-state, then makes described 2nd switching circuit become off-state.
9. power supplier according to claim 7, is characterized in that,
From after making described 2nd switching circuit become to have passed through the stipulated time on-state, described 1st switching circuit is made to become off-state.
10. an image display, is characterized in that,
Described image display has the power supplier described in any one in claim 1 to 9; And load circuit, it receives the supply of the electric power exported from described 2nd rectification circuit of described power supplier,
Described load circuit carries out the process for show image.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-230993 | 2013-11-07 | ||
| JP2013230993A JP6129056B2 (en) | 2013-11-07 | 2013-11-07 | Power supply device and video display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104638928A true CN104638928A (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410643101.0A Pending CN104638928A (en) | 2013-11-07 | 2014-11-06 | Power supply device and image display device |
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| Country | Link |
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| JP (1) | JP6129056B2 (en) |
| CN (1) | CN104638928A (en) |
Families Citing this family (1)
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| JP6296091B2 (en) * | 2015-09-28 | 2018-03-20 | 三菱電機株式会社 | Light source lighting device and lighting fixture |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3529740B2 (en) * | 2001-03-29 | 2004-05-24 | シャープ株式会社 | Switching power supply |
| US7779278B2 (en) * | 2008-05-29 | 2010-08-17 | Igo, Inc. | Primary side control circuit and method for ultra-low idle power operation |
| US8164932B2 (en) * | 2009-02-12 | 2012-04-24 | Apple Inc. | Power converter with automatic mode switching |
| KR101649271B1 (en) * | 2010-06-04 | 2016-08-30 | 삼성전자주식회사 | Switching mode power supply and method of supplying power by using the same |
-
2013
- 2013-11-07 JP JP2013230993A patent/JP6129056B2/en not_active Expired - Fee Related
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- 2014-11-06 CN CN201410643101.0A patent/CN104638928A/en active Pending
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| JP6129056B2 (en) | 2017-05-17 |
| JP2015091203A (en) | 2015-05-11 |
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Application publication date: 20150520 |