CN1512666A

CN1512666A - Method and device for reducing standby power consumption

Info

Publication number: CN1512666A
Application number: CNA021607842A
Authority: CN
Inventors: 玉王; 王玉
Original assignee: JIANGKUI GROUP CO CHENJIANG CITY
Current assignee: JIANGKUI GROUP CO CHENJIANG CITY
Priority date: 2002-12-29
Filing date: 2002-12-29
Publication date: 2004-07-14

Abstract

A method and a device for reducing stand-by power loss is to cut in a MCU on a switch to be written in a control program and MCU controls on-off of a main consumption unit. First of all, MCU is initialized then to set related I/O ports to cut off main power supply and enters into stand-by mode, then to enter into waiting circulation, once the 'power' is pressed on a panel or a remoted controller, the program jumps out of the circulation and judges odd-even of the pressed times to determine if entering into the stand-by or working modes.

Description

A kind of method and device that reduces stand-by power consumption

Technical field

The present invention relates to a kind of method and device that reduces stand-by power consumption, be mainly used in various electrical equipment, especially for household electrical appliance with standby mode.

Background technology

After existing household electrical appliance entered standby mode, though its critical piece has entered low power consumpting state, on the path of power supply, the power consumption components and parts also existed, and such as voltage-stabilizing device, diode, load resistance etc., therefore, power consumption is still higher during standby.As the logical DVD player of a Daepori, the power consumption during operate as normal is about 18W, and power consumption is 10W under the standby mode originally, and as seen, electrical equipment has consumed many electric energy unconsciously.

Summary of the invention

Purpose of the present invention just is to overcome the many disadvantages of the original standby mode of electrical equipment, thoroughly cuts off main power consumption part power supply, stand-by power consumption is dropped to minimum.

In order to achieve the above object, the present invention inserts a MCU on Switching Power Supply, and writes control program, is controlled the break-make of main power consumption unit by MCU.At first MCU is carried out initialization,, cut off main power source, enter standby mode then with the set of corresponding I/O port.Then enter etc. to be recycledly, in case there be " POWER " on panel or the remote controller to press, program is promptly jumped out circulation, and judges the odd even of touch potential, determines to enter standby mode or mode of operation.After state switched, touch potential added 1 again, returned etc. to be recycled.

The invention has the advantages that when entering standby mode that institute's power consumption partly has only MCU, and power consumption≤0.5W of MCU, and in the use of MCU, also accomplish the low-power consumption application, therefore greatly reduced power consumption, and high more for supply power voltage, the part that electric current is big more, consumption reduction is just obvious more.

Description of drawings

Fig. 1 is the program flow diagram of MCU in the inventive method;

Fig. 2 is an embodiment circuit diagram of apparatus of the present invention.

Embodiment

Fig. 1 is the program flow diagram of MCU in the inventive method.At first MCU is carried out initialization, comprise timer and I/O port; With the set of corresponding I/O port, cut off main power source/LEDON then, enter standby mode; PA2, PA4 put height, and PA3 puts low, and red LED D1 is bright, and green LED D2 is for extinguishing state, and " POWER-CONTROL " output low level is cut off main power source.Then program enters and treats etc. to be recycledly, judges remote controller PCO/INT with interrupt mode, with inquiry mode scans I/O port PA0, PA1.If interrupt having the signal input, then enter interrupt service routine at once, judge whether key assignments, if put corresponding I/O port into " POWER ", machine enters operating state, and touch potential adds one, returns etc. to be recycled, simultaneously PA5 exports this value, if not, then jump directly to etc. to be recycled.If panel button input is arranged, then machine enters operating state, and touch potential adds one, returns etc. to be recycled." POWER " key assignments of PA5 output simultaneously.In the beginning of program, the touch potential variable must be changed to 0, through after repeatedly circulating,, must put 0 again as if variable value out of range.

The circuit diagram of Fig. 2 has provided the embodiment of apparatus of the present invention, and it has used said method.Used 6 I/O ports and 1 external interrupt mouth of MCU among the figure, wherein PA2, PA3 connect a light-emitting diode D1 and a D2 respectively, and as the standby indication, D1 is a red light, and D2 is a green light, and during the output high level, LED lights.PA4 is as control signal, and the control power panel is to the break-make of decoding deck power supply, and PA4 connects a reverse triode Q1, to increase driving force, during output low level, cuts off main power source.The remote signal that PA5 output receives, the signal replication that is about to therefrom fracture input is to output herein.PA0, PA1 " POWER " on the panel in response touch button and use, and it is identical with " POWER " key function on the remote controller, presses this key, and then opening power is cut off the electricity supply by next once more.Middle fracture PCO/INT is connected to the output pin that remote control receives head, and each key assignments on the remote controller all can enter MCU like this, but its only responds " POWER " key assignments, and other key assignments then passes through port PA5 output.One powers on, and PA2, PA4 put height, and PA3 puts low, and red LED is bright, and " POWER-CONTROL " is low, and main power source cuts off, and machine is in holding state.During " POWER " key on pressing lower panel or remote controller, PA3 puts height, and PA2, PA4 put low, and green LED is bright, and " POWER-CONTROL " is high, and main power source cuts off, and machine enters operating state." POWER " key when pressing again on lower panel or the remote controller enters standby mode once more.

Use common i/o port output remote signal, in order not influence the main program of decoded portion, what its was exported is a complete remote signal, promptly whenever press primary key, PA3 can send the gap of head sign indicating number and the 4.5ms of a 9ms earlier, sends 16 address code (18ms～36ms), 8 bit data sign indicating numbers (9ms～18ms) and 8 bit data radix-minus-one complements then successively.Each remote controller is corresponding to a unique address code, and numeric data code is a key assignments, and the key assignments that is received by middle fracture decides.In order to overcome the error of RC oscillating circuit, use crystal oscillator as external clock, to guarantee the accuracy of time.

Behind " POWER " key of pressing on lower panel or the remote controller, PA5 also exports the decoding program that " POWER " key assignments is given the rear end, allows it carry out work such as preservation and clear VFD, in order to avoid next time occurs random character, MCU does time-delay to wait for these processing simultaneously.

After embodiment of the present utility model was used for the common DVD machine, stand-by power consumption had dropped to 1.2W from original 10W, has reduced more than 8 times than original method.

Claims

1, a kind of method that reduces stand-by power consumption is characterized in that connecting a MCU on the Switching Power Supply of electrical equipment, and writes control program, control the break-make of main power consumption unit by MCU, at first MCU is carried out initialization, then with the set of corresponding I/O port, cut off main power source, enter standby mode.Then enter etc. to be recycledly, in case there be " POWER " on panel or the remote controller to press, program is promptly jumped out circulation, and judges the odd even of touch potential, determines to enter standby mode or mode of operation, and after state switched, touch potential added 1 again, returns etc. to be recycled.

2, a kind of device that reduces stand-by power consumption is characterized in that on the Switching Power Supply of electrical equipment connecting a MCU, and MCU has used in 6 I/O ports and the external interrupt mouth, and wherein PA2, PA3 connect a light-emitting diode D1 and a D2 respectively; PA4 is the control signal end; PA5 is output remote signal end; PA0, PA1 are connected with a switch; Middle fracture PC0/INT is connected with the output pin that remote control receives head.

3, device according to claim 2 is characterized in that PA4 can connect a reverse triode Q1.