TWI356575B - Power supply circuit and control method thereof - Google Patents

Description

1356575 On May 13, 100, according to the replacement page. 6. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a power supply circuit and a control method therefor. [Prior Art] [0002] With the increasing use of electronic products, low-energy electronic products are gradually favored. However, power circuits, which are an important part of electronic products, consume a lot of energy.

[0003] Please refer to FIG. 1, which is a block diagram of a circuit structure of a prior art power supply circuit. The power circuit 1 includes a first input terminal 2, a second input terminal 3, a relay 4, a main power source 5, a sub power source 6, a microprocessor 7, and a switch 8_. The secondary power source 6 includes a transformer 9 and a rectification filter circuit (not shown).

The first input terminal 2 is electrically connected to the main power source 5, and the second input terminal 3 is electrically connected to the main power source 5 via the relay 4, and the main power source 5 is electrically connected to a load (not shown). The first and second input terminals 2, 3 are also electrically connected to the two ends of the primary coil (not labeled) of the transformer 9, and the secondary coil (not labeled) of the transformer 9 is electrically connected to the micro via the rectifying and filtering circuit. Processor 7. The inductor (not shown) of the relay 4 is grounded at one end and electrically connected to the microprocessor 7 at the other end. [0005] The operating principle of the power circuit 1 is as follows: [0006] An AC voltage is input to the power circuit 1 via the first and second input terminals 2, 3, and the transformer 9 and the rectifying filter circuit via the sub power source 6 The DC voltage is applied to the microprocessor 7 to cause the microprocessor 7 to be in a powered state. 096137469 Form No. A0101 Page 5 of 35 Page 1003167776-0 1356575 _:__ 100 years May 13 i Shuttle replacement page [0007] After the microprocessor 7 is powered up, when the user generates a switch by the switch 8 When the pulse signal is turned on to the microprocessor 7, the microprocessor 7 sends a control signal to the relay 4 according to the power-on pulse signal, so that the relay 4 is in an on state. At this time, the AC voltage input to the first and second input terminals 2, 3 is loaded to the main power source 5, and is processed by the main power source 5 to supply the load. After the main power supply 5 is operated, when the user generates a shutdown pulse signal to the microprocessor 7 by the switch 8, the microprocessor 7 sends a control signal to the relay 4 according to the shutdown pulse signal, and the relay 4 is broken. open,

The main power source 5 has no voltage output, and the load stops operating. At this time, the power source circuit 2 is in a standby state. [0008] However, since the first and second input terminals 2, 3 always supply a power-on voltage to the microprocessor 7 via the sub-power source 6, a voltage is always applied to the transformer 9 of the sub-power source 6. Since the transformer 9 of the sub power source 6 consumes a large amount of energy, even when the power source circuit 1 is in the standby state, its power consumption is still large. [Summary of the Invention]

In view of the above, it is necessary to provide a power supply circuit that reduces standby power consumption. [0010] In view of the above, it is necessary to provide a power supply circuit control method that reduces standby power consumption. [0011] A power supply circuit for supplying power to a load includes a main circuit, a standby control circuit, a microprocessor, a standby detection circuit, and a storage circuit. The main circuit is used to convert the voltage input from the external circuit. The standby control circuit is for controlling the operating state of the main circuit. The microprocessor is configured to accept the voltage outputted by the main circuit and according to the working condition of the load 096137469 Form No. A0101 Page 6 of 35 Page 1003167776-0 1356575 13 Day Correction 1# Page_ |^〇〇5〇ϋ State A control signal is provided to the standby control circuit. The appellation detection circuit is configured to detect the working state of the load, and provide a shutdown control signal and a power-on control signal to the microprocessor and the standby control circuit according to the working state of the load. The tank circuit is used to provide the energy required for the standby clamp circuit. When the load enters from the working state, "

The microprocessor sends a control signal to the standby control circuit, so that the standby control circuit controls the main circuit to be turned off. After the main circuit is turned off, the energy storage circuit provides control to the standby control circuit to turn the main circuit back on. The required energy; when the load enters the work from the stop state, the standby control circuit controls the main circuit to operate normally, and the voltage that the main circuit turns out charges the storage circuit.

[ _ - a power circuit control method, comprising the steps of: providing a main circuit, the main circuit receiving a voltage signal input to the power circuit and converting the voltage signal, the converted voltage signal is provided to a microprocessor to make The micro-processing n is powered on; after the micro-processing is transferred to the power-on, according to the working state of the load of the main circuit, when the control signal is sent to the standby control circuit, the standby control circuit controls the main The 'supply-storage circuit is turned off. When the main circuit is turned off, the bank and the circuit provide the standby control circuit with the energy required to control the main circuit to be turned on again. [0013] 096137469 A standby power supply circuit that supplies power to a load, including: a main circuit;卩The voltage of the circuit wheel is converted; the standby control circuit “connects the voltage of the main circuit by X, and provides a control signal to the standby control circuit according to the operation of the load; and the storage capacitor is in the standby Control electric power; - can f acquire circuit, the form form dock number A01-01 page 7 / total 35 pages! 〇〇 3167776-〇1356575 _ 100 years. May 13th nuclear replacement page volume acquisition circuit electrical connection a first power source, a first diode,

a second capacitor and a second diode, the first capacitor is sequentially connected to the first diode, and the second capacitor is connected in parallel with the second diode between the anode and the ground of the first diode; Wherein, when the load enters the stop working state from the working state, the microprocessor sends a control signal to the standby control circuit, so that the standby control circuit controls the main circuit to be turned off, and after the main circuit is turned off, the storage capacitor is turned to The standby control circuit provides energy required to control the main circuit to be turned on again; the standby control circuit controls the main circuit to operate normally when the load enters operation from a stopped operation state.

[0014] Compared with the prior art, the microprocessor of the power circuit of the present invention receives the voltage outputted by the main circuit and provides a control signal to the standby control circuit, so that the standby control circuit provides a control signal when the load is stopped. The main circuit* is such that the main circuit is turned off. Since the main circuit is turned off, the energy storage circuit supplies the standby control circuit with the energy required to control the main circuit to be turned on again, so that the power consumption of the power supply circuit is reduced. [Embodiment] Referring to Figure 2, there is shown a block diagram of a circuit configuration of a first embodiment of a power supply circuit of the present invention. The power circuit 20 includes a first and second input terminals 211, 212, an energy harvesting circuit 22, a rectifying and filtering circuit 23, a standby indicating circuit 24, a storage circuit 25, a main circuit 26, and a standby control circuit. 27. A microprocessor 28 and a standby detection circuit 29. [0016] The first and second input terminals 211 and 212 are respectively a Live Line input terminal and a Null Line input terminal of an AC voltage. The 1003167776-0 096137469 Form No. A0101 Page 8 of 35 [0017] The AC voltage that is rotated by the second input terminals 211, 212 is rectified by the rectifying filter circuit 23 on May 13th, 100th. After filtering, a DC voltage is output to the main circuit 26 at the output terminal 231 of the rectifying and filtering circuit 23. The alternating voltages that are pulsed by the first and second input terminals 211, 212 also provide energy to the energy harvesting circuit 22.

The main circuit 26 receives the DC voltage outputted from the rounding end 231 of the rectifying and filtering circuit 23, and converts the DC voltage to the microprocessor 28 via the first 'second round end 260, 261 of the main circuit 26. powered by. For example, the main circuit converts the DC voltage output from the rectifying and filtering circuit 23 into 26V and 'the 26V and 5V voltages are respectively outputted by the first and second output terminals 260, 261 of the main circuit .26. The main circuit 26 simultaneously supplies power to the energy acquisition circuit 22 by the first and third output terminals 260, 262 of the main circuit 26. [0018] The energy acquisition circuit 22 respectively receives the first and second from the power supply circuit 2 The input terminals 211, 212, the first and third output terminals 26, 262 of the main circuit 26 acquire voltage, and provide voltages to the standby indicating circuit 24 and the energy storage circuit at the output end 221 of the energy harvesting circuit 22, respectively. 25. [0019]

The I 6 set standby indication circuit 24 receives voltage from the output terminal 221 of the energy harvesting circuit 22 and the first output terminal 26 of the main circuit 26 to display the operating state of the main circuit 26, respectively. [0020]. The energy storage circuit 25 receives and stores the power transmitted from the output terminal 22 of the energy harvesting circuit 22, and supplies the standby control circuit 27 to the output terminal 251 of the energy storage circuit 25 to control the power circuit 2 () to turn on/off. Energy. 096137469 The far standby detection circuit 29 determines whether the power supply circuit 2 is formed by the signal voltage of the load (not shown) by the input terminal 291 of the standby detection circuit 29 to determine whether the form number A0101 is 9 or a total of 35 pages. 1003167776-0 [0021] 1356575 After May 13, 100, the page is replaced, and the control signal is sent to the microprocessor 28 and the first and second output terminals 292, 293 of the standby detection circuit 29, respectively. Standby control circuit 27. [0022] The microprocessor 28 receives and analyzes the control signal sent by the first output terminal 292 of the standby detection circuit 29 and the second output terminal 272 of the standby control circuit 27. According to the control signal, the microprocessor 28 sends corresponding control signals to the standby control circuit 27' via its first and second output terminals 281, 282, respectively, and its third output terminal 283 is used to control the operation of the load.

[0023] The standby control circuit 27 receives the voltage output from the output terminal 251 of the tank circuit 25, and powers up the standby control circuit 27. The standby control circuit 27 also receives the control signals from the first and second output terminals 281 and 282 of the microprocessor 28 and the second output terminal 293 of the standby detection circuit 29, respectively, and the first output terminal thereof 271 clamps the operating state of the main circuit 26. The standby control circuit 27 sends a control signal to the microprocessor 28 via its second output 272 according to the operation signal sent by the user.

Please refer to FIG. 2 and FIG. 3 together, wherein FIG. 3 is a schematic diagram of the internal circuit of the main circuit 26 shown in FIG. 2. The main circuit 26 is a switching power supply circuit including a transformer 263, a switch control circuit (Switch 10264, a transistor 265, and a feedback circuit 266. The transformer 263 includes a primary coil 267 and a primary coil 268' The primary coil 267 is on the side of the primary end of the transformer 263, and the secondary winding 268 is on the side of the secondary end of the transformer 263. Typically, the ground voltage of the primary side of the transformer 263 is not zero, and the ground voltage of the secondary side is 0, therefore, when an electronic component is electrically connected to the ground end of the primary end of the transformer 263, the primary end of the electronic component is grounded. In the following, 'the grounding of the electronic component is indicated by grounding 096137469 Form No. A0101 Page 10 of 35 Page 1003167776-0 1356575 On May 13, 100, the positive replacement page voltage is 0, and the primary end grounding indicates that the electronic component is electrically connected to the ground terminal of the primary end of the transformer 263.

[0025] One end of the primary coil 267 is grounded via the transistor 265 and a resistor (not labeled), and the ground terminal of the primary end of the transformer 263 is defined as the third output 262 of the main circuit 26. The secondary winding 268 is electrically connected to the first output terminal 260 of the main circuit 26 by a rectifying and filtering circuit (not shown), and one of the secondary coils 268 is not tapped (not labeled) by another rectification A filter circuit (not shown) is electrically coupled to the second output 261 of the main circuit 26, the other end of which is grounded. Therefore, the input voltage of the main circuit 26 is divided by the transformer 263 to output two different voltages, for example, 26V, 5V. The switch control circuit 264 is electrically coupled to the first output 271 of the standby control circuit 27 to receive the control signal from the standby control circuit 27. The feedback circuit 266 is electrically coupled between the second output 261 of the main circuit 26 and the switch control circuit 264 to feed back the output voltage of the main circuit 26 to the switch control circuit 264. The switch control circuit 264 controls the on-time of the transistor 265 to adjust the voltages output by the first and second output terminals 260, 261. Please refer to FIG. 2 and FIG. 4 together. FIG. 4 is a schematic diagram of the internal circuit of the energy harvesting circuit 22 and the energy storage circuit 25 shown in FIG. The energy storage circuit 25 includes a storage capacitor, one end of which is grounded, and the other end of which is electrically connected to the output end 221 of the energy harvesting circuit 22. [0027] The energy harvesting circuit 22 includes a large energy harvesting circuit 222. and first, second, and third micro energy harvesting circuits 223' 224, 225. The output terminals of the large energy acquisition circuit 222 and the first, second, and third micro energy acquisition circuits 223, 224, and 225 are connected to the output end of the energy acquisition circuit 22, 096137469. Form No. A0101, page 11/35 pages, 1003167776 -0 1356575 On May 13, 100, the revised page 221 was amended. [0028] The large energy harvesting circuit 222 obtains energy from the first output terminal 260 of the main circuit 26, and includes a diode (not labeled), and the anode of the diode is electrically connected to the first output of the main circuit 26. Terminal 260 has its cathode electrically coupled to output 221 of energy harvesting circuit 22.

[0029] The first and second micro energy harvesting circuits 223 and 224 respectively obtain energy from the first and second input terminals 211 and 212 of the power source circuit 20. The first and second micro energy harvesting circuits 223 and 224 have the same circuit configuration. The input ends of the first and second micro energy harvesting circuits 223, 224 are electrically connected to the first 'second input terminals 211, 212 of the power source circuit 20, respectively. The first micro energy harvesting circuit 2 23 includes first and second capacitors (not labeled) and first and second diodes (not labeled). The first input end 211 of the power circuit 20 is electrically connected to the anode of the first diode via the first capacitor, and the cathode of the first diode is electrically connected to the output end 221 of the energy harvesting circuit 22. The second capacitor and the second diode form a parallel circuit, and the positive pole of the second diode is grounded, and the cathode of the second diode is electrically connected to the anode of the first diode. [0030] The third micro energy harvesting circuit 225 takes energy from the primary ground of the transformer 263 of the main circuit 26, that is, the third output 262 of the main circuit 26. The input of the third micro energy harvesting circuit 225 is electrically coupled to the third output 262 of the main circuit 26. The internal circuit of the third micro-energy acquisition circuit 225 is similar to the first micro-energy acquisition circuit 223, except that the first capacitance of the third micro-energy acquisition circuit 225 can also be a resistor or an inductor. [0031] When the main circuit 26 is in operation, the large energy acquisition circuit 222 and the first, second, and third micro energy acquisition circuits 223, 224, 225 simultaneously to the storage 096137469 form number A0101 page 12 / total 35 Page 1003167776-0 1356575 On May 13, 100, the storage capacitor of circuit 25 can be powered. When the main circuit 26 is in the standby state, only the first, second, and third micro-energy acquiring circuits 223, 224, 225 supply power to the stored energy. Please refer to FIG. 2 ' FIG. 5 , wherein FIG. 5 is a schematic diagram of the internal circuit of the standby indicating circuit 24 shown in FIG. 2 . The standby indicating circuit 24 includes a capacitor 241, a first transistor 242' - a second transistor 243, a light emitting diode 244, and a Zener diode 245. The first transistor 242 is a PNP type bipolar transistor, and the second transistor 243 is an NPN type bipolar transistor. [0033] The emitter of the first transistor 242 is electrically connected to the output terminal 221 of the energy harvesting circuit 22 via a resistor (not labeled) and a negative electrode of a body (not labeled). The emitter of the first transistor 242 is simultaneously grounded via the capacitor 241. The collector of the first transistor 242 is grounded via the positive and negative electrodes of the LED 244. The base of the first transistor 242 is electrically connected to its emitter via a resistor (not labeled), and the base is electrically connected to the collector of the second transistor 243 via another resistor (not shown). The pole is also electrically connected to the first output 260 of the main circuit 26 via a negative and positive pole of a diode (not shown). The emitter of the second transistor 243 is grounded, and the base thereof is electrically connected to the emitter of the first transistor 242 via the anode and the cathode of the Zener diode 245. [0034] When the main circuit 26 is in an active state, a voltage of the first output terminal 26〇 (for example, 26V) is applied to the base of the first transistor 242, and the first transistor 242 is turned off. The polar body 244 does not emit light. [0035] When the main circuit 26 is in the standby state, the first output terminal 260 of the main circuit 26 has no voltage output, and the energy acquisition circuit 22 via its output terminal 221 1003167776-0 096137469 Form No. A0101 Page 13 of 35 Page 1356575 [0036] The 100-year-old May 13th replacement page charges the capacitor 241. When the voltage across the capacitor '241 is charged to a certain value, the Zener diode 245 is turned on, and the second transistor 243 is turned on, and the base of the first transistor 242 is pulled to a low potential, so that the first power The crystal 242 is turned on, and the capacitor 241 is discharged through the first transistor 242 and the LED 244, and the LED 244 emits light. When the voltage across the capacitor 241 is discharged to a certain value, the first transistor 242 and the second transistor 243 are simultaneously turned off, and the LED 244 stops emitting light, and the first, second, and second of the energy acquiring circuit 22 The three micro energy acquisition circuits 223, 224, and 225 recharge the capacitor 241. When the voltage of the voltage capacitor 241 (four) reaches m, the light emitting diode (10) emits light again. Therefore, when the main circuit 26 is in the standby state, the capacitor 241 is continuously charged and discharged, so that the light-emitting diode 244 is continuously flashed to indicate that the power supply circuit 20 is in the standby state. [0037] Please refer to FIG. 2 'FIG. 6, wherein FIG. 6 is a schematic diagram of the internal circuit of the standby control circuit 27 shown in FIG. 2. The standby control circuit 27 includes a switch milk, a flip-flop 274, a transistor 275, a light turn 276, and an inverter 277. The switch 273 is a component for manually controlling the power circuit 2Q by the user. Touch Switch, unidirectional switch or bidirectional switch. The transistor 275 is an NPN type bipolar transistor, and the transistor 275 can also be a metal oxide semiconductor field effect transistor.

[0038] One end of the switch 273 is grounded, the other end is electrically connected to the flip-flop 274, and is electrically connected to the second output end 272 of the standby control circuit 27 via a negative and positive pole of a diode (not labeled), and via The second output 272 is electrically coupled to the microprocessor 28. The base of the transistor 275 is electrically connected to the flip-flop 274, the emitter of which is grounded via the optocoupler 276, and its collector is electrically connected to the positive 096137469. Form No. A0101 Page 14 / Total 35 Page 1003167776-0 1356575 On the first day of May 1st, 100th, the page reverser 274 is replaced, and the collector is electrically connected to the output end 251 of the storage circuit 25 via the negative and positive poles of a diode (not labeled). Therefore, the energy storage is performed. Circuit 25 supplies power to the flip flop 274 and the transistor 275. The input end of the inverter 277 is grounded via the secondary end of the optocoupler 276, and the output of the inverter 277 is electrically connected to the first output 271 of the standby control circuit 27, and via the first output 271 The switch control circuit 264 of the main circuit 26 is electrically connected. [0039] the flip-flop 274 and the base of the transistor 275 are respectively connected via a diode (not ^,

The negative and positive terminals are electrically connected to the first and second output terminals 281, 282 of the microprocessor 28. The flip flop 274 is also electrically coupled to the second output 293 of the standby detection circuit 29. [0040] Please refer to FIG. 2 to FIG. 6 together, the operating principle of the power circuit 20 is as follows: [〇〇41] When the first and second input terminals 211, 21 of the power circuit 20 input an AC voltage, The AC voltage is rectified and filtered by the rectifying filter circuit 23 and then applied to the primary coil 267 of the transformer 263 of the main circuit 26.

When the user wants to turn on the power circuit 20, it presses the switch 273 of the standby control circuit 27, and the switch 273 generates a trigger pulse, which causes the flip-flop 274 to generate a power-on pulse signal to The base of the transistor 275 is turned on. The voltage of the energy storage circuit 25. is sequentially applied to the primary end of the optocoupler 276 via its output terminal 251 and the transistor 275, so that the primary end of the light is sequentially turned on, and the secondary end is turned on. The input potential of the device 277 is pulled low. The output of the inverter 277 outputs a high voltage signal via the first output 271 of the standby control circuit 27 to cause the switch control circuit 264 of the main circuit 26 to start operating. The 096137469 Form No. 101 0101 Page 15 / Total 35 Page 1003167776-0 1356575 ___, _ 100 years 05. The 13th revised replacement page switch control circuit 264 controls the conduction time of the transistor 265 of the main circuit 26, thereby making the main The first and second output terminals 26, 261 of circuit 26 output a voltage which in turn causes microprocessor 24 to control the operation of the load. At the same time, the microprocessor 28 sends a control signal to the flip-flop 274 and the transistor 275' of the standby control circuit 27 via its first 'second output terminals 281, 282, respectively, to lock the flip-flop 274 and the electric The working state of the crystal 275.

When the user wants to turn off the power circuit 20, the user again presses the switch 273 of the standby control circuit 27, which generates a shutdown pulse signal to the microprocessor 28. The microprocessor 28 loads a base of the transistor 275 of the standby control circuit 27 at a second output 282 of the microprocessor 28 according to the shutdown signal, and the transistor 275 is turned off, thereby enabling the smooth surface. 276 deadline. The input terminal of the inverter 277 is pulled to a high potential, and the output of the inverter 277 outputs a low voltage signal through the first output terminal 271 of the standby control circuit 27 to stop the switch control circuit 264 of the main circuit 26. Work, and the transformer 263 stops working. The first and second output terminals 260' 261 of the main circuit 26 have no voltage output, the LEDs 244 of the standby indicating circuit 24 start to flash, and the microprocessor 28 and the load stop operating. The microprocessor 28 unlocks the flip-flop 274 of the standby control circuit 27. [0044] When the power supply circuit 20 is used for a liquid crystal display, the load may be other power components such as a liquid crystal panel, an inverter, and a universal serial bus (USB) interface. The following is a description of the standby principle of the power supply circuit 20 by taking the load as a liquid crystal panel: [0045] When the power supply circuit 20 is operating normally, the standby detection circuit 29 detects the voltage input to the liquid crystal panel via its input terminal 291. Signal, for example: digit 096137469 Form No. A0101 Page 6 / Total 35 Page 1003167776-0 1356575

[0046]

Corrected the signal of the Digital Visual Interface (DVI) signal, the Video Graphics Array (VGA) interface signal, and the High Definition Multimedia Interface (HDMI) signal on May 13th, 100. Voltage: If the standby detection circuit 29 does not detect the signal voltage, it sends a standby signal to the microprocessor 28, and the microprocessor 28 loads a low power on the second output 282 according to the standby signal. The transistor 275 of the standby control circuit 27 is turned off, thereby turning off the optocoupler 276. The input terminal of the inverter 277 is pulled to a high potential, and the output of the inverter 277 is The first output terminal 271 of the standby control circuit 27 outputs a low voltage signal to stop the switch control circuit 264 of the main circuit 26, and the transformer 263 stops operating. The first and second rounds of the main circuit 26 have no voltage output, and the LEDs 244 of the standby indicating circuit 24 start to flash to indicate that the power circuit 2 is in a standby state, and the microprocessor 28 stopped working. At this time, the microprocessor 28 releases the lock of the flip-flop 274 of the standby control circuit 27. After the power supply circuit 20 enters the standby state, if the standby detection circuit '29 detects the voltage signal input to the liquid crystal panel via its input terminal 291, the standby detection circuit 29 sends a pulse through its second output terminal 293. The signal causes the flip-flop 274 of the standby control circuit 27 to generate a turn-on pulse signal to the base of the transistor 275 'the transistor 275 is turned on. The output terminal 251 of the tank circuit 25 is loaded with a voltage at the primary end of the optocoupler 276 such that the primary and secondary ends of the optocoupler 276 are turned on in turn, and the turn-out of the inverter 277 is pulled low. The output of the inverter 277 outputs a high voltage signal through the first output terminal 271 of the standby control circuit 27 to open the main circuit 26 096137469 Form No. A0101 Page 17 / Total 35 Page 1003167776-0 1356575 100 years On May 13th, the modified lane change control circuit 264 starts to operate, so that the first and second output terminals 260 '261 of the main circuit 26 output voltage, and the microprocessor 28 controls the operation of the load. The microprocessor 28 simultaneously transmits a control signal ' via its first and second output terminals 281, 282 to lock the operational state of the flip-flop 274 and the transistor 275 of the standby control circuit 27. [0047] Compared with the prior art, the power circuit 20 of the present invention enters shutdown or waits

In the state of the machine, the main circuit 26 is stopped, and therefore, the power supply circuit 2 has lower power consumption than the power supply circuit of the prior art. The power supply circuit 20 can also monitor the working state of the load by the standby control circuit 27. If the load stops working, the power circuit 20 automatically enters a standby state, thereby causing the main circuit 26 to stop working. The power consumption of the power circuit 2 is further reduced. [0048] The power supply circuit 20 of the present invention supplies power to the energy storage circuit 25 via the energy acquisition circuit 22 as compared with the prior art. When the power circuit 2 is in a shutdown or standby state, the first, second, and third micro-energy acquiring circuits 223, 224, and 225 supply power to the energy storage circuit 25, and when the power circuit 2 is operating normally, The large energy acquisition circuit 222 also supplies power to the tank circuit 25, thereby speeding up the charging circuit 25. At the same time, the user can more clearly judge the operating state of the power supply circuit 2 by whether or not the light-emitting diode 244 of the standby finger circuit 24 is blinking. Referring to FIG. 7, a block diagram of a circuit configuration of a second embodiment of the power supply circuit of the present invention is shown. The difference between the power supply circuit 30 and the power supply circuit 2 is that the first input terminal 311 of the power supply circuit 3G is electrically connected to the fourth circuit, and the second input terminal 312 is electrically connected to the rectification wave circuit 33 by the relay 313. . When the power circuit 30 enters the shutdown or standby state, the standby 096137469 control circuit 37 sends a control signal to cause the relay form number A0101 to be disconnected, so that the power source 1003167776-0 1356575 On May 13, 100, the main circuit 36 of the positive replacement page circuit 30 was stopped to achieve the purpose of reducing energy consumption. [0050] In summary, the present invention has indeed met the requirements of the invention, and the patent application is filed according to law. However, the above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or changes made by those skilled in the art in light of the spirit of the present invention should be It is covered by the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS [0051] FIG. 1 is a block diagram showing the circuit structure of a prior art power supply circuit.

2 is a block diagram showing the circuit configuration of a first embodiment of the power supply circuit of the present invention. 3 is a schematic diagram of an internal circuit of the main circuit shown in FIG. 2. 4 is a schematic diagram showing the internal circuit of the energy harvesting circuit and the energy storage circuit shown in FIG. 2. 5 is a schematic diagram of an internal circuit of the standby indicating circuit shown in FIG. 2. 6 is a schematic diagram of an internal circuit of the standby control circuit shown in FIG. 2.

7 is a block diagram showing the circuit configuration of a second embodiment of the power supply circuit of the present invention. [Main component symbol description] [0058] Power supply circuit: 20, 30 [0059] First input terminal: 211, 311 [0060] Second input terminal: 212, 312 [0061] Energy acquisition circuit: 22, 32 [0062] Output: 221 096137469 Form No. A0101 Page 19 / Total 35 Page 1003167776-0 1356575 [0063] Large Energy Acquisition Circuit: 222 [0064] First Micro Energy Acquisition Circuit: 223 [0065] Second Micro Energy Acquisition Circuit: 224 [0066] Third micro energy acquisition: 225 [0067] Rectifier filter circuit: 23 [0068] Output: 231 [0069] Standby indication circuit: 24 [0070] Capacitance: 241 [0071] First transistor: 242 [ 0072] Second transistor: 243 [0073] Light-emitting diode: 244 [0074] Zener: 245 [0075] Energy storage circuit: 25 [0076] Output: 251 [0077] Main circuit: 26, 36 [ 0078] First output: 260 [0079] Second output: 261 [0080] Third output: 262 [0081] Transformer: 263 096137469 Form number A0101 Page 20 of 35 Page 100. May 13 Correction replacement page 1003167776-0

1356575 [0082] Switch Control Circuit: 264 [0083] Transistor: 265 [0084] Feedback Circuit: 266 [0085] Primary Coil: 267 [0086] Secondary Coil: 268 [0087] Standby Control Circuit: 27 ' 37 [0088 First output: 271 [0089] Second output: 272 [0090] Switch 2 73 [0091] Positive and negative: 274 [0092] Transistor: 275 [0093] Optocoupler: 276 [0094] Inverter : 277 [0095] Microprocessor: 28 [0096] First output: 281 [0097] Second round of output: 282 [0098] Third output: 283 [0099] Standby detection circuit: 29 [0100] Input: 291 096137469 Form No. A0101 Page 21 / Total 35 pages 100 years May 13th Revision replacement page 1003167776-0 1356575 100 years of May 13th Shuttle replacement page [0101] First output: 29 2 [0102 ] Second output: 29 3 [0103] Relay: 31 3

096137469 Form No. A0101 Page 22 of 35 1003167776-0

Claims (1)

1356575 100 years. May 13th, nuclear replacement page VII, the scope of application for patents: 1. A power supply circuit, which supplies power to the load, including: a main circuit for converting the voltage input to the external circuit; a circuit for controlling an operating state of the main circuit; a microprocessor for receiving a voltage outputted by the main circuit, and providing a control signal to the standby control circuit according to the negative 'loaded operating state; and an energy storage a circuit for supplying power to the standby control circuit; a standby detection circuit for detecting the working state of the load, and providing a shutdown control signal and a power-on control signal to the microprocessor and the standby control circuit according to the working state of the load; When the load enters the stop working state from the working state, the microprocessor sends a control signal to the standby control circuit, so that the standby control circuit controls the main circuit to be turned off, and after the main circuit is turned off, the energy storage circuit is turned to The standby control circuit provides energy required to control the main circuit to be turned on again; When the load enters operation from the stop state, the standby control circuit controls the main circuit to operate normally, and the voltage outputted by the main circuit charges the tank circuit. The power supply circuit of claim 1, wherein the power supply circuit further comprises a rectifying and filtering circuit for supplying a DC voltage to the main circuit. 3. The power supply circuit of claim 2, wherein the main circuit comprises a switch control circuit, a transistor, and a transformer, the switch control circuit providing a control signal to the transistor to control the power The on-time of the crystal adjusts the output voltage of the transformer. 4. The power supply circuit as described in claim 3, wherein the transformer 096137469 form number A0101 page 23/total 35 page 1003167776-0 · 1356575 100 years of May 13th The primary coil and the primary coil are electrically connected to the rectifying and filtering circuit at one end, and the other end is grounded via the transistor, and the primary end is electrically connected to the microprocessor and the other end is grounded. 5. The power supply circuit of claim 3, wherein the standby control circuit includes a switch for turning the main circuit on or off, and a transistor for controlling the operation of the switch control circuit of the main circuit. a state; and a flip-flop for generating a pulse signal to turn on the transistor of the standby control circuit. 6. The power supply circuit of claim 5, wherein the transistor A metal oxide semiconductor field effect transistor. 7. The power supply circuit of claim 5, wherein the transistor is a NPN type bipolar transistor. 8. The power circuit of claim 5, wherein the standby control The transistor of the circuit comprises a base, an emitter and a collector, the base of the transistor being electrically connected to the flip-flop, the emitter of which is electrically connected to the switch control circuit of the main circuit, the flip-flop and the The collectors of the transistors are electrically connected to the energy storage circuit, and the switch is grounded at one end and electrically connected to the flip-flop and the microprocessor at the other end. 9. The power supply circuit of claim 8, wherein the standby control circuit further comprises an optocoupler, the emitter of the transistor of the standby control circuit being electrically connected to the switch control circuit of the main circuit via the optocoupler . 10. The power supply circuit of claim 9, wherein the standby control circuit further comprises an inverter electrically coupled between the optocoupler and the switch control circuit of the main circuit. 11. The power supply circuit of claim 8, wherein the microprocessor includes a first and a second output, the first output electrically connecting the positive and negative 096137469 form number A0101, page 24 / Total 35 pages 1003167776-0 1356575 16 17 18 19 20 096137469 The replacement pager is modified on May 13, 100, and the second output terminal is electrically connected to the base 12 of the transistor of the standby control circuit. The power supply circuit according to claim 8 of the patent application, wherein The energy storage circuit includes a capacitor, one end of which is grounded, and the other end is electrically connected to the collector of the flip-flop and the standby control circuit. 13. The power supply circuit of claim 4, wherein the power supply circuit further comprises an energy harvesting circuit that supplies energy to the energy storage circuit. 14. The power supply circuit of claim 13, wherein the power supply circuit further comprises a large energy harvesting circuit that obtains energy from an output voltage of the main circuit. The power supply circuit of claim 14, wherein the energy acquisition circuit further comprises a first and second micro energy acquisition circuit, wherein the first and second micro energy acquisition circuits respectively input the power source The power supply circuit of the circuit of claim 15, wherein the energy acquisition circuit further comprises a third micro energy acquisition circuit, the third micro energy acquisition circuit from the primary ground of the main circuit transformer Get energy. The power supply circuit of claim 16, wherein the third micro energy acquisition circuit comprises a first capacitor and a first diode connected in series. The power supply circuit of claim 16, wherein the third micro energy acquisition circuit comprises a resistor and a first diode in series. The power supply circuit of claim 16, wherein the third micro energy acquisition circuit comprises one inductor and a first diode in series. The power supply circuit of claim 17, wherein the third micro energy acquisition circuit further comprises a second capacitor and a second diode, the first form number A0101, page 25, total 35, 1003167776-0 1356575 ___—I On May 13, 100, the nuclear replacement page two capacitor is connected in parallel with the second diode between the anode and the ground of the first diode. 21. The power supply circuit of claim 13, wherein the power supply circuit further comprises a standby indicating circuit to display an operating state of the main circuit. The power supply circuit of claim 21, wherein the standby indicating circuit comprises a capacitor, a first and a second transistor, a Zener diode and a light emitting diode, wherein the capacitor is grounded at one end. The other end is electrically connected to the energy acquisition circuit, and the emitter of the first transistor is electrically connected to the energy acquisition circuit, and the collector is grounded via the LED, and the base thereof is electrically connected to the emitter and the second transistor, respectively. The collector and the main circuit, the emitter of the second transistor is grounded, and the base thereof is electrically connected to the emitter of the first transistor via the Zener diode. The power circuit of claim 2, wherein the power circuit further includes a relay, wherein an AC voltage input to the power circuit is input to the rectifier filter circuit via the relay, and the standby control circuit provides a control signal The relay controls the conduction and the off of the relay to control the working state of the main circuit. 24. A method of controlling a power supply circuit, comprising the steps of: a. providing a main circuit, the main circuit receiving a voltage signal input to the power circuit, and converting the voltage signal, the converted voltage signal is provided to a micro The processor is configured to power up the microprocessor; b. after receiving the voltage, the microprocessor sends a control signal to a standby control circuit according to the working state of the load of the main circuit, so that the load stops working, The standby control circuit controls the main circuit to be turned off; c. providing a tank circuit, and when the main circuit is turned off, the tank circuit provides the standby control circuit with energy required to control the main circuit to be turned on again. 096137469 Form No. A0101, page 26, a total of 35 pages, 1003167776-0, 1356, 550, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00 The standby detection circuit detects the working state of the load, and sends a control signal to the microprocessor and the standby control circuit respectively to control the working state of the main circuit. 26. The power circuit control method according to claim 25, wherein When the load enters the stop working state by normal operation, the standby detection circuit sends a control signal to the microprocessor, so that the microprocessor controls the main circuit to stop working; when the load is stopped, the normal operation is completed. In the state, the standby detection circuit sends a control signal to the standby control circuit, so that the standby control circuit controls the main circuit to operate normally. The power circuit control method of claim 26, wherein the load is a liquid crystal panel, and the standby detection circuit determines whether the liquid crystal panel is working normally by detecting a signal voltage input to the liquid crystal panel. . The power circuit control method of claim 27, wherein the standby detection circuit detects a signal voltage of a digital video interface signal input to the liquid crystal panel. The power circuit control method according to claim 28, wherein the standby detection circuit detects a signal voltage of a video image array interface signal input to the liquid crystal panel. The power circuit control method according to claim 27, wherein the standby detection circuit detects a signal voltage of a high definition multimedia interface signal input to the liquid crystal panel. The power circuit control method according to claim 27, wherein the liquid crystal panel stops working when the liquid crystal panel has no signal voltage input, and the liquid crystal panel operates normally when the liquid crystal panel has a signal voltage input. 32. A standby power supply circuit that supplies power to the load, including: 1003167776-0 096137469 Form No. A0101 Page 27 of 35 1355755 Correction of replacement page One of the main circuits for inputting external circuits The voltage is converted; a standby control circuit is configured to receive the voltage outputted by the main circuit, and provide a control signal to the standby control circuit according to the working state of the load; a storage capacitor for supplying power to the standby control circuit ; An energy acquisition circuit electrically connected to the mains input terminal for supplying energy to the storage capacitor, comprising first and second micro energy acquisition circuits, wherein the first and second micro energy acquisition circuits comprise a first capacitor, a first diode, a second capacitor, and a second diode, wherein the first capacitor is sequentially connected to the first diode, and the second capacitor is connected in parallel with the second diode Between the anode of the diode and the ground; wherein, when the load enters the stop state from the working state, the microprocessor sends a control signal to the standby control circuit, so that the standby control circuit controls the main circuit to be turned off. After the main circuit is turned off, the storage capacitor provides the standby control circuit with the energy required to control the main circuit to be turned on again; when the load enters the work from the stop working state, the standby control circuit controls the main circuit to operate normally. 096137469 Form No. A0101 Page 28 of 35 1003167776-0