TW201527946A - Energy saving circuit for computer - Google Patents

Abstract

The invention discloses an energy saving circuit for computer, used to control working state of a host and a display of the computer, thus to save energy. The energy saving circuit includes a power supply module, an infrared sensor module and a control module. The power supply module is electrically connected to the infrared sensor module, the control module and the display. The infrared sensor module is electronically connected to the control module, and is configured to detect whether the user leaves the display and transfer a corresponding detection signal to the control module. The control module is electronically connected to the host and the display, and is used to calculate a left time according to the detection signal, and control the host and the display to enter into different working states on the basis of the left time, so as to control the rank of energy consumption.

Description

Computer energy-saving circuit

The invention relates to an energy-saving circuit, in particular to a computer energy-saving circuit.

With the rapid development of computers, computers are becoming more and more widely used in people's work and life, which makes the energy saving of computers more and more important. However, when the user leaves the computer, the computer is often not turned off for some reason, the user leaves for a long time and the computer is still running, which causes a great waste of electric energy.

In view of the above problems, it is necessary to provide a computer energy-saving circuit.

A computer energy-saving circuit for controlling a working state of a host and a display, wherein the computer energy-saving circuit comprises a power module, an infrared sensor module and a control module, wherein the power module is electrically connected and provides a working voltage to the infrared sensor module, a control module and a display; the infrared sensor module is electrically connected to the control module, and is configured to detect whether the user leaves the display and transmit the corresponding detection signal to the control module; the control module is also electrically connected to the host and the display For calculating the time when the user leaves according to the received probe signal, and controlling the host and the display to enter different working states according to the length of time the user leaves, to hierarchically control the power consumption of the host and the display.

The computer energy-saving circuit detects whether the user leaves the front of the display by the infrared sensing module, and the control module hierarchically controls the energy consumption of the display and the host according to the length of the departure time, thereby achieving the energy-saving effect.

1 is a functional block diagram of a computer energy-saving circuit of the present invention in accordance with a preferred embodiment of the present invention.

2 is a circuit connection diagram of the computer energy-saving circuit shown in FIG. 1.

Referring to FIG. 1, the computer energy-saving circuit 100 of the preferred embodiment of the present invention is used to control the working state of the display 200 and the host 300 to achieve better energy saving effects. The computer energy-saving circuit 100 includes a power module 10, an infrared sensor module 20, a control module 30, and a display interface module 40.

The power module 10 is electrically connected to the infrared sensor module 20, the control module 30, and the display interface module 40 for supplying power to the infrared sensor module 20, the control module 30, and the display interface module 40. Referring to FIG. 2, the power module 10 includes a power supply +5V_SB, a power switch SW1, a first voltage dividing resistor R1, a second voltage dividing resistor R2, a first capacitor C1, and a second capacitor C2. In this embodiment, the power supply +5V_SB is a +5V standby power supply of the computer system. The power switch SW1 is used to establish or disconnect an electrical connection between the power supply +5V_SB and the control module 30 to selectively supply power to the control module 30. The first capacitor C1 is grounded at one end, and the other end is electrically connected to a node between the power supply +5V_SB and the power switch for high frequency filtering of the power supply and preventing power supply transients from affecting the operation of the control module 30. The first voltage dividing resistor R1 is electrically connected between the power switch SW1 and the control module 30, and the other end is electrically connected to the second voltage dividing resistor R2. The other end of the second voltage dividing resistor R2 is grounded. The voltage value of the node between the first voltage dividing resistor R1 and the second voltage dividing resistor R2 is the infrared sensing module 20 and the display interface module by the voltage dividing action of the first voltage dividing resistor R1 and the second voltage dividing resistor R2. The operating voltage of the group 40, in this embodiment, the voltage value of the node is +3V. The second capacitor C2 is grounded at one end, and the other end is electrically connected to a node between the first voltage dividing resistor R1 and the second voltage dividing resistor R2 for high frequency filtering of the power source and preventing power transients from affecting the display interface module. 40 jobs.

The infrared sensing module 20 is configured to detect whether the user leaves the front of the display 200 and transmit the detection signal to the control module 30. The infrared sensor module 20 includes an infrared sensor 21 and a first pull-up resistor R3. The infrared sensor 21 is grounded at one end, and the other end is electrically connected to the control module 30 to transmit a detection signal to the control module 30, and The first pull-up resistor R3 is electrically connected to the node between the first voltage dividing resistor R1 and the second voltage dividing resistor R2 of the power module 10 to pull up the detection signal output by the infrared sensor 21 to the control module. 30 identifiable potentials.

The control module 30 is electrically connected to the host 300 and electrically connected to the display 200 through the display interface module 40 for realizing energy consumption of the host 300 and the display 200 according to the detection signal of the infrared sensing module 20. Hierarchical control. The control module 30 includes a microcontroller 31, a clock circuit 32, and a reset circuit 33. In the present embodiment, the microcontroller 31 is a single-chip microcomputer model AT89C51 manufactured by ATMEL Corporation. The microcontroller 31 includes a power pin VCC, a ground pin GND, a first clock pin XTAL1, a second clock pin XTAL2, a reset pin RST, a first pin P0.0, and a second pin P0.7. The third pin P1.0, the fourth pin P1.2, the fifth pin P2.2, and the sixth pin EA/VPP. The power pin VCC is electrically connected to the power supply +5V_SB by the power switch SW1, the ground pin GND is grounded, and the first clock pin XTAL1 and the second clock pin XTAL2 are electrically connected to the clock circuit 32. The pin RST and the sixth pin EA /VPP are electrically connected to the reset circuit 33, and the first pin P0.0 is electrically connected to the display interface module 40. The second pin P0.7, the third pin P1.0, and the fourth pin P1.2 are electrically connected to the sleep mode signal point SLP_S3# of the host 300, the sleep mode signal point SLP_S4#, and the deep sleep mode, respectively. Signal point SUSWARN#, the node between the second pin P0.7 and the sleep mode signal point SLP_S3# is grounded through the first pull-down resistor R4; the third pin P1.0 and the sleep mode signal point SLP_S4# The node between the two is grounded through the second pull-down resistor R5; the node between the fourth pin P1.2 and the deep sleep mode signal point SUSWARN# is grounded through a third pull-down resistor R6. The first pull-down resistor R4, the second pull-down resistor R5, and the third pull-down resistor R6 are used to release excess charge when the corresponding pin changes from a high potential to a low potential. The pin P2.2 of the microcontroller 31 is electrically connected to the infrared sensor 21 for receiving a detection signal from the user that the infrared sensor 21 feeds back. When the potential of the sleep mode signal point SLP_S3# is a logic low level, the host 300 is in the sleep mode; when the potential of the sleep mode signal point SLP_S4# is a logic low level, the host 300 is in the sleep mode; the deep sleep mode signal point SUSWARN# When the potential is a logic low level, the host 300 is in a deep sleep mode. The power consumption of the host 300 in the sleep mode, the sleep mode, and the deep sleep mode is gradually reduced.

The clock circuit 32 is used to provide a clock signal to the microcontroller 31. The clock circuit 32 includes a crystal body Y1, a third capacitor C3, and a fourth capacitor C4. One end of the third capacitor C3 and the fourth capacitor C4 are grounded, and the other end of the third capacitor C3 is connected to one end of the crystal oscillator Y1 and then connected to the first clock pin XTAL1, the fourth capacitor C4 The other end is connected to the other end of the crystal body Y1 and then connected to the second clock pin XTAL2.

The reset circuit 33 is for resetting the microcontroller 31. The reset circuit 33 includes a reset switch SW2, a second pull-up resistor R7, and a fourth pull-down resistor R8. The second pull-up resistor R7 is electrically connected to the power pin VCC at one end, and is connected to the sixth pin EA/VPP at the other end and is connected to the reset pin RST through the reset switch SW2. The reset pin RST is grounded through the fourth pull-down resistor R8.

The display interface module 40 includes a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) Q1, a self-recovering fuse FV1, a Video Graphics Array (VGA) interface 41, and a current limiting resistor. R9, a fifth pull-down resistor R10, a fifth capacitor C5, and a sixth capacitor C6. In this embodiment, the MOSFET Q1 is of the NPN type, the gate g of the MOSFET Q1 is electrically connected to the first pin P0.0 of the microcontroller 31, and the gate g is grounded through the fifth pull-down resistor R10; The drain d of the MOSFET Q1 is grounded; the source s of the MOSFET Q1 is electrically connected to the first voltage dividing resistor R1 and the second voltage dividing resistor R2 through the current limiting resistor R9; the VGA interface 41 passes the self-recovering fuse FV1 is electrically connected to the source s of the MOSFET Q1; the fifth capacitor C5 is grounded at one end, and the other end is electrically connected between the self-recovering fuse FV1 and the current limiting resistor R9; the sixth capacitor C6 is grounded at one end, and the other end is electrically connected. Connected between the VGA interface 41 and the self-recovery fuse FV1.

The working process of the computer power saving circuit 100 will be described in detail below.

When the user turns on the host 300 and the display 200, the power switch SW1 is connected, and the micro controller 31 automatically lifts the fourth pin P1.2, the third pin P1.0, and the second pin P0.7 in order. High to logic high, pull the first pin P0.0 down to a logic low level, at this time the MOSFET Q1 is off. After that, the computer power-saving circuit 100 starts to work. The power module 10 provides a suitable working voltage for the infrared sensor module 20, the control module 30, and the display interface module 40. The infrared sensor 21 emits a continuous signal to detect whether the display 200 user is away from the display 200. When the user does not leave the display 200, the infrared sensor 21 transmits a detection signal that is logic high to the microcontroller 31. At this time, the output signals of the pins of the microcontroller 31 are unchanged; when the user leaves the display 200 The infrared sensor 21 transmits a logic low level detection signal to the microcontroller 31. At this time, the micro controller 31 starts timing, and when the timer reaches a first preset time, such as 1 minute, the micro controller 31 pulling the first pin P0.0 to a logic high level, at which time the MOSFET Q1 is turned on, so that the VGA interface 41 is grounded through the self-recovery fuse FV1, that is, the VGA interface 41 no longer has a power supply, The display 200 enters a standby state. When counting to a second preset time, such as up to 10 minutes, the microcontroller 31 pulls the potential of the second pin P0.7 to a logic low level due to the second pin P0.7 and the sleep mode. The signal point SLP_S3# is electrically connected, thereby pulling the potential of the sleep mode signal point SLP_S3# to ground, and the host 300 enters a sleep state. When counting to a third preset time, such as 30 minutes, the microcontroller 31 pulls the potential of the third pin P1.0 to a logic low level, due to the third pin P1.0 and the sleep mode signal point. The SLP_S4# is electrically connected to pull the potential of the sleep mode signal point SLP_S4# to ground, and the host 300 enters a sleep state. When counting to a fourth preset time, such as 60 minutes, the microcontroller 31 pulls the potential of the fourth pin P1.2 to a logic low level due to the fourth pin P1.2 and the deep sleep mode. The signal point SUSWARN# is electrically connected to pull the potential of the deep sleep mode signal point SUSWARN# to ground, and the host 300 enters the deep sleep state.

At any time during the above timing, when the infrared sensor 21 detects that the user returns to the front of the display 200, the infrared sensor 21 transmits a logic high level detection signal to the microcontroller 31, at which time the micro control The timer 31 starts counting. When counting a predetermined time, such as 5 seconds, the microcontroller 31 pulls down the fourth pin P1.2, the third pin P1.0, and the second pin P0.7. The pin sequentially raises the potential to a logic high level, and pulls the first pin P0.0 to a logic low level, so that the host 300 and the display 200 resume normal operation after the hierarchical wake-up time, specifically, the host 300 and When the display 200 is in different working states of standby, sleep, and deep sleep, the wake-up time is from short to long.

At any time, if the reset switch SW2 is turned on, the host 300 and the display 200 immediately resume normal operation.

The computer energy-saving circuit 100 detects whether the user leaves the front of the display 200 through the infrared sensor 21, and the micro-controller 31 controls the working state of the display 200 and the host 300 according to the departure time, thereby performing energy consumption on the display 200 and the host 300. Grading control to achieve better energy saving effect.

100‧‧‧Computer energy-saving circuit

200‧‧‧ display

300‧‧‧Host

10‧‧‧Power Module

20‧‧‧Infrared sensor module

30‧‧‧Control Module

40‧‧‧Display interface module

21‧‧‧Infrared sensor

31‧‧‧Microcontroller

32‧‧‧clock circuit

33‧‧‧Re-circuit

41‧‧‧VGA interface

SW1‧‧‧Power switch

SW2‧‧‧Re-switch

Q1‧‧‧MOSFET

Y1‧‧‧ crystal oscillator

FV1‧‧‧ self-recovery fuse

R1‧‧‧ first voltage divider resistor

R2‧‧‧Second voltage divider resistor

R3‧‧‧First pull-up resistor

R4‧‧‧First pull-down resistor

R5‧‧‧second pull-down resistor

R6‧‧‧ third pull-down resistor

R7‧‧‧Second pull-up resistor

R8‧‧‧4th pull-down resistor

R9‧‧‧ current limiting resistor

R10‧‧‧ fifth pull-down resistor

VCC‧‧‧Power pin

GND‧‧‧ Grounding Pin

RST‧‧‧Reset pin

XTAL1‧‧‧ first clock pin

XTAL2‧‧‧ second clock pin

P0.0‧‧‧ first pin

P0.7‧‧‧second pin

P1.0‧‧‧ third pin

P1.2‧‧‧ fourth pin

P2.2‧‧‧ fifth pin

EA/VPP‧‧‧ sixth pin

C1‧‧‧first capacitor

C2‧‧‧second capacitor

C3‧‧‧ third capacitor

C4‧‧‧fourth capacitor

C5‧‧‧ fifth capacitor

C6‧‧‧ sixth capacitor

+5V_SB‧‧‧Power supply

SLP_S3#‧‧‧Sleep mode signal point

SLP_S4#‧‧‧Sleep mode signal point

SUSWARN#‧‧‧Deep sleep mode signal point

no

200‧‧‧ display

300‧‧‧Host

10‧‧‧Power Module

20‧‧‧Infrared sensor module

30‧‧‧Control Module

40‧‧‧Display interface module

Claims (10)

A computer energy-saving circuit for controlling the working state of the host and the display, wherein the computer energy-saving circuit comprises a power module, an infrared sensor module and a control module, and the power module is electrically connected and provides a working voltage to the infrared The sensing module, the control module and the display; the infrared sensing module is electrically connected to the control module, and is configured to detect whether the user leaves the display and transmit a corresponding detection signal to the control module; the control module is also electrically connected The host and the display are configured to calculate the time when the user leaves according to the received detection signal, and control the host and the display to enter different working states according to the length of time the user leaves, to perform hierarchical control on the power consumption of the host and the display. The computer energy-saving circuit according to claim 1, wherein the power module comprises a power source, a power switch, a first voltage dividing resistor and a second voltage dividing resistor, and the power source is selectively electrically connected to the control module through the power switch. The first voltage dividing resistor is electrically connected between the power switch and the control module, the other end is electrically connected to the second voltage dividing resistor, and the other end of the second voltage dividing resistor is grounded, and the infrared sensing module is electrically connected. The node is connected to the node between the first voltage dividing resistor and the second voltage dividing resistor to obtain an operating voltage. The computer energy-saving circuit of claim 1, wherein the infrared sensor module comprises an infrared sensor and a first pull-up resistor, the infrared sensor is grounded at one end, and the other end is electrically connected to the control module. The detection signal is sent to the control module, and is electrically connected to the power module through the first pull-up resistor to obtain the working voltage, and the potential of the detection signal of the infrared sensor is pulled up to the potential recognized by the control module. The computer energy-saving circuit of claim 1, wherein the control module comprises a microcontroller, the power controller includes a power pin, a ground pin, a first pin, a second pin, and a third a pin pin, a fourth pin, and a fifth pin, the power pin is electrically connected to the power source, the ground pin is grounded, and the first pin outputs a signal for controlling the working state of the display, the second lead The pin, the third pin and the fourth pin are respectively electrically connected to the sleep mode signal point, the sleep mode signal point, and the deep sleep mode signal point of the host, and the fifth pin of the microcontroller is electrically connected to the infrared sensor mode. The group is configured to receive a detection signal transmitted by the infrared sensing module. The computer energy-saving circuit of claim 4, wherein the control module further includes a clock circuit, the clock circuit includes a crystal body, a third capacitor, and a fourth capacitor, and the microcontroller further includes a first clock a second clock pin, one end of the third capacitor and the fourth capacitor are grounded, and the other end of the third capacitor is connected to one end of the crystal oscillator body and then connected to the first clock pin, the first The other end of the four capacitor is connected to the other end of the crystal body and then connected to the second clock pin. The computer energy-saving circuit of claim 4, wherein the control module further comprises a reset circuit, the reset circuit includes a reset switch, a second pull-up resistor, and a fourth pull-down resistor, the microcontroller includes a sixth a pin, a reset pin, one end of the second pull-up resistor is electrically connected to the power pin, and the other end is connected to the sixth pin and is connected to the re-set pin through a reset switch, and the reset pin is grounded through the fourth pull-down resistor . The computer energy-saving circuit according to claim 1, wherein the computer energy-saving circuit further comprises a display interface module, wherein the display interface module comprises a metal oxide semiconductor field effect transistor, a self-recovering fuse, and a video graphic array interface. a current limiting resistor and a fifth pull-down resistor, the gate of the MOSFET is electrically connected to the control module to receive a signal sent by the control module to control the working state of the display, and the gate passes the fifth Pull-down resistor is grounded; the drain of the MOSFET is grounded; the source of the MOSFET is electrically connected to the power module through a current limiting resistor; the video graphics array interface passes through The recovery fuse is electrically connected to the source of the MOSFET, and the video graphics array interface is also used to connect the display. The computer energy-saving circuit according to claim 7, wherein when the user does not leave the display, the infrared sensor transmits a logic high level detection signal to the control module, and the control module outputs a logic low level. The control signal to the gate of the metal oxide semiconductor field effect transistor turns off the metal oxide semiconductor field effect transistor, and the display works normally; when the user leaves the display, the infrared sensor transmits a logic low detection signal to a control module, the control module outputs a logic high level control signal to pull up a gate potential of the metal oxide semiconductor field effect transistor, and the metal oxide semiconductor field effect transistor is turned on, thereby the video graphic The array interface is grounded through a self-recovery fuse, that is, the video graphics array interface no longer has a power supply, and the display is in a standby state. The computer power-saving circuit of claim 4, wherein the second pin is electrically connected to the sleep mode signal point to have a first pull-down resistor, and the other end of the first pull-down resistor is grounded; A third pull-down resistor is electrically connected between the three pin and the sleep mode signal point, and the other end of the second pull-down resistor is grounded; and a third pull-down resistor is electrically connected between the fourth pin and the deep sleep mode signal point, The other end of the third pull-down resistor is grounded. The computer energy-saving circuit according to claim 9, wherein the microcontroller sequentially pulls down potentials of the second pin, the third pin, and the fourth pin according to the length of time the user leaves, the microcontroller When the potential of the second pin is pulled down to a logic low level, the potential of the sleep mode signal point is pulled down to ground, and the host enters a sleep state; the microcontroller pulls the potential of the third pin to a logic low. Normally, at this time, the potential of the sleep mode signal point is pulled down to ground, and the host enters a sleep state; when the microcontroller pulls the potential of the fourth pin to a logic low level, the potential of the deep sleep mode signal point at this time Pulled low to ground, the host enters deep sleep.