CN107358932B - A kind of power control circuit and method, display device - Google Patents
A kind of power control circuit and method, display device Download PDFInfo
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- CN107358932B CN107358932B CN201710827774.5A CN201710827774A CN107358932B CN 107358932 B CN107358932 B CN 107358932B CN 201710827774 A CN201710827774 A CN 201710827774A CN 107358932 B CN107358932 B CN 107358932B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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Abstract
The present invention discloses a kind of power control circuit and method, display device, is related to field of display technology, so that mainboard realizes zero-power, to solve limitation of the standby efficiency grade of display device by power consumption possessed by master chip itself.The power control circuit includes: signal control module, the ground connection control module of ground connection, and the upspring type key switch and electromagnetic switch module that connect respectively with power supply line；Power supply line is connect by upspring type key switch with the input terminal of signal control module, and power supply line is electrically connected by the control end of applying of electromagnetic switch module with the input terminal of ground connection control module；Power supply line is connect with the controlled end of electromagnetic switch module, so that controlled end is powered to mainboard and signal control module, the output end and upspring type key switch of signal control module are connect with the control terminal of ground connection control module respectively.The power control method applies above-mentioned power control circuit.Power control circuit provided by the invention is in display device.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of power control circuit and methods, display device.
Background technique
With increasing rapidly for household electrical appliance owning amount, problems of energy consumption is widely paid close attention to by people.Countries in the world
The energy efficiency of energy-consuming product all is improved by formulating and implementing Energy Efficiency Standard, popularization Energy Efficiency Labeling System, promotes energy saving skill
Art progress, and then reduce discharge and the protection environment of nuisance.
Such as: it is provided in Chinese computer display Energy Efficiency Standard GB21520-2008: the efficiency grade of liquid crystal display
It is divided into three-level, the stand-by power consumption of the first efficiency grade is 0.5W, and the stand-by power consumption of the second efficiency grade is 1W, third efficiency grade
Stand-by power consumption be 2W.
And available liquid crystal display is being pressed when switch, the master chip in liquid crystal display on mainboard can control backlight pass
It closes and other external equipments (such as power amplifier chips) is closed, to guarantee that the power consuming device other than master chip is all closed, therefore,
The stand-by power consumption of available liquid crystal display includes master chip power consumption, power panel and power supply adaptor power consumption；And due to power panel and
For adapter power consumption generally in 0.2W~0.3W or so, this makes the master chip power consumption in liquid crystal display must be in certain range
It is interior, the standby efficiency grade of liquid crystal display can be made to meet GB21520-2008 regulation.Therefore, liquid crystal display to
Function effect grade is limited by power consumption possessed by master chip itself.
Summary of the invention
The purpose of the present invention is to provide a kind of power control circuit and methods, display device, so that mainboard realizes zero power
Consumption, to solve limitation of the standby efficiency grade of display device by power consumption possessed by master chip itself.
To achieve the goals above, the invention provides the following technical scheme:
A kind of power control circuit, comprising: signal control module, ground connection control module, and connect respectively with power supply line
Upspring type key switch and electromagnetic switch module；
The power supply line is connect by the upspring type key switch with the input terminal of the signal control module, the electricity
Source line is electrically connected by the control end of applying of the electromagnetic switch module with the input terminal of the ground connection control module, the ground connection control
The output end of module is grounded；The power supply line is connect with the controlled end of the electromagnetic switch module, the electromagnetic switch module
Controlled end is used to power to the mainboard and the signal control module, the output end of the signal control module and described bounces
Formula key switch is connect with the control terminal of the ground connection control module respectively；The signal control module according to for bouncing
The state of formula key switch controls the ground connection control module on or off.
Compared with prior art, in power control circuit provided by the invention, power supply line is connect with upspring type key switch,
Upspring type key switch is also connect with the control terminal of ground connection control module, and power supply line is applied control end and connect by electromagnetic switch module
The input terminal of ground control module is electrically connected, and is grounded the output end ground connection of control module, when so that pressing upspring type key switch, electricity
The power supply signal that source line provides can control ground connection control module conducting by upspring type key switch；At this point, power supply signal is just
It being capable of applying in control end and ground connection control module importing ground wire by electromagnetic switch module；And due to power supply line and electromagnetic switch mould
The controlled end of block connects, and the controlled end of electromagnetic switch module is used to supply to mainboard and signal control module as power output end
Therefore electricity passes through when applying control end of electromagnetic switch module in power supply signal, the controlled end of electromagnetic switch module can be opened in electromagnetism
It closes applying for module to control under the control of end, so that power supply signal applies control end to mainboard and signal control module by electromagnetic switch module
Power supply, this makes it possible to guarantee the electrification of signal control module to control ground connection control module conducting, so that power supply line continues
To main board power supply.
And when needing standby, can by pressing upspring type key switch so that upspring type key switch pressing state to
The shutdown signal that signal control module provides, signal control module can control ground connection control module shutdown according to shutdown signal, from
And guarantees power supply signal and stop powering to mainboard and signal control module.It can be seen that need to only press and bounce when needing standby
Formula key switch cuts off motherboard power supply line to main board power supply, so that the complete power down of mainboard, energy by power control circuit
Enough guarantee that mainboard realizes zero-power in the standby state, the standby efficiency grade of such display device would not be by master chip certainly
The limitation of power consumption possessed by body.
The present invention also provides a kind of power control methods, control electricity using the power supply that above-mentioned technical proposal provides
Road, the power control method include:
When the power supply signal that power supply line provides is powered to mainboard and signal control module, upspring type key switch, institute are pressed
It states upspring type key switch and is in pressing state, the closing letter that the upspring type key switch is provided to the signal control module
Number, the signal control module controls ground connection control module according to the shutdown signal and turns off, so that the power supply signal stops
It powers to the mainboard and the signal control module.
Compared with prior art, the beneficial effect Yu above-mentioned technical proposal of power control method provided by the invention provide
The beneficial effect of power control circuit is identical, and this will not be repeated here.
The present invention also provides a kind of display device, the power control circuit provided including above-mentioned technical proposal.
Compared with prior art, the power supply that the beneficial effect of display device provided by the invention and above-mentioned technical proposal provide
The beneficial effect of control circuit is identical, and this will not be repeated here.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of power control circuit provided in an embodiment of the present invention.
Appended drawing reference:
IN- power input, OUT- power output end；
K1- upspring type key switch, U1- signal control module；
U2- electromagnetic switch module, L- inductance coil；
K2- noncontacting switch, DC/DC- voltage transformation module；
B- protects circuit, RF1- the first divider resistance；
RF2- the second divider resistance, RXCurrent-limiting resistance；
RcBiasing resistor, Q- are grounded control module；
D1- first diode, the second diode of D2-；
A- tie point.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, power control circuit provided in an embodiment of the present invention, powers for control mainboard；Including signal control
Molding block U1, ground connection control module Q, and the upspring type key switch K1 and electromagnetic switch module that are connect respectively with power supply line
U2。
The power input IN of power supply line is connect by upspring type key switch K1 with the input terminal of signal control module U1,
The power input IN of power supply line is electrically connected by the control end of applying of electromagnetic switch module U2 with the input terminal of ground connection control module Q,
It is grounded the output end ground connection of control module Q；Power supply line is connect with the controlled end of electromagnetic switch module U2, electromagnetic switch module U2's
Controlled end is used to power to mainboard and signal control module U1 as power output end OUT, the output end of signal control module U1
It is connect respectively with the control terminal of ground connection control module Q with upspring type key switch K1；Signal control module U1 is used for basis and bounces
The state control ground connection control module Q on or off of formula key switch K1.
The control method of power control circuit provided in an embodiment of the present invention is described in detail with reference to the accompanying drawing.
When the power supply signal that power supply line provides is powered to mainboard and signal control module U1, upspring type key switch is pressed
K1, upspring type key switch K1 are in pressing state (i.e. upspring type key switch K1 conducting), and upspring type key switch K1 is to letter
The shutdown signal that number control module U1 is provided, signal control module U1 control ground connection control module Q according to shutdown signal and turn off, this
Sample power supply signal just can not apply control end by electromagnetic switch module U2, so that the controlled end of electromagnetic switch module U2 can not be in electricity
Under the control for applying control end of magnetic switch module U2, power supply signal is powered to mainboard and signal control module U1, to guarantee to cut off
The power supply of mainboard and signal control module U1.And in the state of bouncing at upspring type key switch K1, power conversion module at this time
Power down, and mainboard keeps power off state.
When the power supply signal that power supply line provides is not powered to mainboard and signal control module U1, upspring type key is pressed
Switch K1, upspring type key switch K1 are in pressing state, and power supply signal passes through upspring type key switch K1 control ground connection control
Module Q conducting, so that power supply signal applies control end and ground connection control module Q importing ground wire by electromagnetic switch module U2；In
Electromagnetic switch module U2's applies control end when passing through power supply signal, and electromagnetic switch module U2's applies control end control electromagnetic switch module U2
Controlled end conducting so that power supply signal is supplied by the controlled end of electromagnetic switch module U2 to mainboard and signal control module U1
Electricity, so that signal control module U1 control ground connection control module Q is held on.In addition, upspring type key switch K1 is in and bounces
State (i.e. upspring type key switch K1 disconnection), power supply signal can not control ground connection control module by upspring type key switch K1
Q conducting；But since, in pressing state, signal control module U1 control ground connection controls mould at upspring type key switch K1
Block Q is held on, and therefore, when upspring type key switch K1, which is in, bounces state, power supply signal still is able to open by electromagnetism
The controlled end of module U2 is closed to mainboard and signal control module U1 continued power.
Specific structure and the implementation process of the power control circuit provided based on the above embodiment are it is found that the embodiment of the present invention
In the power control circuit of offer, power supply line is connect with upspring type key switch K1, and upspring type key switch K1 is also controlled with ground connection
The control terminal of molding block Q connects, the input terminal electricity applied control end and be grounded control module Q that power supply line passes through electromagnetic switch module U2
Connection, the output end ground connection of ground connection control module Q, when so that pressing upspring type key switch K1, the power supply that power supply line provides is believed
Number can by upspring type key switch K1 control ground connection control module Q conducting, to guarantee that power supply signal passes through electromagnetic switch
Module U2's applies in control end and ground connection control module Q importing ground wire；And due to the controlled end of power supply line and electromagnetic switch module U2
The controlled end of connection, electromagnetic switch module U2 is used to power to mainboard and signal control module U1 as power output end OUT, because
This passes through when applying control end of electromagnetic switch module U2 in power supply signal, and the controlled end of electromagnetic switch module U2 can be opened in electromagnetism
It closes applying for module U2 to control under the control of end, so that power supply signal is controlled by the control end of applying of electromagnetic switch module U2 to mainboard and signal
Module U1 power supply, this makes it possible to guarantee signal control module U1 electrification to control ground connection control module Q conducting, so that electric
Source line continues to main board power supply.
It, can be by pressing upspring type key switch K1, so that upspring type key switch K1 is in pressing shape when needing standby
The shutdown signal that state is provided to signal control module U1, signal control module U1 can control ground connection control module according to shutdown signal
Q shutdown, to guarantee that power supply signal stops powering to mainboard and signal control module U1.It can be seen that when needing standby, only
Upspring type key switch K1 need to be pressed, motherboard power supply line is cut off to main board power supply, so that mainboard by power control circuit
Complete power down, it will be able to guarantee that mainboard realizes zero-power in the standby state, the standby efficiency grade of such display device is just not
It will receive the limitation of power consumption possessed by master chip itself.
And since the standby efficiency grade of display device would not be limited by power consumption possessed by master chip itself, make
It obtains when producing the master chip on mainboard, without considering that standby energy consumption is lost, to reduce the production cost of master chip.
It is worth noting that, in above-described embodiment signal control module U1 can be single-chip microcontroller or other control modules, when
When signal control module U1 is single-chip microcontroller, the GND pin ground connection of single-chip microcontroller, the Vcc pin of single-chip microcontroller is as power interface and electricity
The controlled end of magnetic switch module U2 connects, and the IO1 pin of single-chip microcontroller is connect as input terminal with upspring type key switch K1, monolithic
The IO2 pin of machine is connect as output end with the control terminal of ground connection control module Q.
When power supply line is not powered to mainboard and single-chip microcontroller, upspring type key switch K1 is pressed, and upspring type key is opened
It closes K1 and is in pressing state, so that power supply signal is powered by the controlled end of electromagnetic switch module to mainboard and single-chip microcontroller, at this point,
The voltage that single-chip microcontroller is directly exported the IO2 pin as output end is predisposed to high level.
And when power supply line is powered to mainboard and single-chip microcontroller, since single-chip microcontroller is in power-up state, upspring type is pressed at this time
Key switch K1, and upspring type key switch K1 is in pressing state, above-mentioned first divider resistance RF1Connect the second divider resistance
RF2Anode-cathode voltage be high level, and be supplied to IO1 pin of the single-chip microcontroller as input terminal, single-chip microcontroller is converted to high level low
Ground connection control module Q is given in level, output, is grounded control module Q with shutdown.
It should be noted that the wide variety multiplicity of above-mentioned electromagnetic switch module U2, as shown in Figure 1, electromagnetic switch module
U2 can be relay, and the control end of applying in relay is inductance coil L, and controlled end is noncontacting switch K2, and inductance coil L is logical
When electric, noncontacting switch K2 is enabled to be connected, therefore, when above-mentioned electromagnetic switch module U2 is relay, power supply line passes through
The inductance coil L is connect with the input terminal of ground connection control module Q；Power supply line is connect with one end of noncontacting switch K2, oncontacting
The other end of point switch K2 is powered as power output end OUT to mainboard and signal control module U1.Based on the structure, work as ground connection
When control module Q is connected, inductance coil L just has power supply signal and passes through, i.e. inductance coil L has electric current to pass through, so that contactless
Switch K2 is closed under the magnetic field caused by inductance coil L, and such power supply signal can be by noncontacting switch K2 to mainboard
It powers with signal control module U1.
And in order to guarantee the stability and safety of signal control module U1 work, above-described embodiment is in electromagnetic switch module
The controlled end of U2 is connect with the power interface of signal control module U1 by voltage transformation module DC/DC, in electromagnetic switch mould
The controlled end for applying control end control electromagnetic switch module U2 of block U2, so that power supply signal is powered to mainboard and signal control module U1
When, power supply signal is converted by voltage transformation module DC/DC, so that the voltage of power supply signal is in signal control module U1
Operating voltage, to guarantee job stability and the safety of signal control module U1.
Further, as shown in Figure 1, power control circuit provided by the above embodiment further includes protection circuit B, upspring type is pressed
Key switch K1 is connect with the input terminal of the control terminal of ground connection control module Q and signal control module U1 respectively by protection circuit B,
By protecting circuit B to be at least used to protect signal control module U1.
Optionally, as shown in Figure 1, above-mentioned protection circuit B includes the first divider resistance RF1And the second partial pressure electricity of ground connection
Hinder RF2；Upspring type key switch K1, the first divider resistance RF1With the second divider resistance RF2It is sequentially connected in series together, the first partial pressure
Resistance RF1Connect the second divider resistance RF2End (i.e. tie point a) in Fig. 1 input terminal with signal control module U1 respectively
It is connected with the control terminal of ground connection control module Q, and the first divider resistance RF1Connect the second divider resistance RF2Anode-cathode voltage answer
When the operating voltage for being no more than signal control module U1.
Such as: as shown in Figure 1, signal control module U1 is single-chip microcontroller, operating voltage is 3.3V or 5V, in single-chip microcontroller
Operating voltage is 3V, and power supply signal voltage is 12V, the first divider resistance RF1Resistance value be 27K Ω, the second divider resistance RF2's
Resistance value is 10K Ω, at this point, the first divider resistance RF1Connect the second divider resistance RF2Anode-cathode voltage be 3.24V, therefore, first
Divider resistance RF1Connect the second divider resistance RF2Anode-cathode voltage be no more than signal control module U1 operating voltage, to protect
Single-chip microcontroller work is demonstrate,proved in safe voltage.
Meanwhile the power supply signal of 12V carries out voltage by voltage transformation module DC/DC and turns after noncontacting switch K2
It changes, the voltage of power supply signal is made to be down to 3.3V, be supplied to single-chip microcontroller, the output end voltage of single-chip microcontroller is predisposed to about by single-chip microcontroller
The high level of 3.3V, so that single-chip microcontroller control ground connection control module Q conducting.
In addition, the first divider resistance R in above-described embodimentF1, the second divider resistance RF2Resistance sizes be to be controlled by signal
What the operating voltage size of module U1 determined.And consider the first divider resistance RF1Connect the second divider resistance RF2End not
It only connect with the input terminal of signal control module U1, but also is connected with the control terminal of ground connection control module Q, this makes first
Divider resistance RF1, the second divider resistance RF2When flowing through electric current, ground connection control module Q conducting can be controlled.
And ground connection control module Q is caused to burn in order to avoid electric current is excessive, as shown in Figure 1, protecting electricity in above-described embodiment
Road B passes through current-limiting resistance RXIt is connect with the control terminal of ground connection control module Q, to avoid the control terminal sum aggregate of ground connection control module Q
Electrode current is excessive；And current-limiting resistance RXWhen current limliting, need and the first divider resistance R in protection circuit BF1With the second partial pressure electricity
Hinder RF2Coordinated just can guarantee at the electric current of ground connection control module Q in safe range, and can be grounded control module
When Q needs to be connected, guarantee that the voltage for being supplied to ground connection control module Q control terminal enables to ground connection control module Q conducting.
And the control end of applying of electromagnetic switch module U2 passes through biasing resistor R in above-described embodimentcWith ground connection control module Q it is defeated
Enter end connection, so that biasing resistor RcThe input terminal electric current into ground connection control module Q can be limited, guarantees ground connection control module
Q is worked normally.
Illustratively, above-mentioned ground connection control module Q is NPN type triode, at this time upspring type key switch K1 and signal control
The connection of the base stage of molding block U1 and NPN type triode, the controlled end of electromagnetic switch module U2 and the collector of NPN type triode connect
It connects, the emitter ground connection of NPN type triode；Upspring type key switch K1 and signal control module U1 passes through current-limiting resistance RXRespectively
It is connect with the base stage of NPN type triode, the controlled end of electromagnetic switch module U2 passes through biasing resistor RcWith ground connection control module Q's
Collector connection.At this point, biasing resistor RcIt can not only limit into NPN type triode collector current size, and can also
It is enough to provide direct current biasing to NPN type triode, so that NPN type triode is in saturation state and on state.
Further, it is contemplated that the output end and upspring type key switch K1 of signal control module U1 controls mould with ground connection respectively
The control terminal of block Q connects, so that power supply signal is easy to make by upspring type key switch K1 control ground connection control module Q conducting
Electric current recharge is obtained to signal control module U1, and controls ground connection control module Q conducting in signal control module U1, is easy so that electric
It flows back to and is poured into upspring type key switch K1 institute in the loop；Based on this, referring to Fig. 1, power supply provided by the above embodiment controls
Circuit further includes first diode D1 and the second diode D2 in parallel, and protection circuit B is connect with the anode of first diode D1,
The cathode of first diode D1 passes through current-limiting resistance RXIt is connect with the control terminal of ground connection control module Q, and signal control module
Output end is connect with the anode of the second diode D2, and the cathode of the second diode D2 passes through current-limiting resistance RXWith ground connection control module
The control terminal of Q connects.Based on the structure, when upspring type key switch K1 is pressed, and it is in pressing state, power supply signal passes through guarantor
Protection circuit B, first diode D1, current-limiting resistance RXWhen control ground connection control module Q conducting, the second diode D2 can prevent electricity
It flows back to and is poured into signal control module U1；And when being bounced after upspring type key switch K1 is pressed, signal control module U1 control
When being grounded control module Q conducting, first diode D1 can be avoided the electric current recharge into protection circuit B.
Illustratively, the embodiment of the invention provides a kind of power control circuit as shown in Figure 1, the power control circuits
Structure referring to above, wherein power line voltage is 12V, signal control module U1 be operating voltage be 3.3V single-chip microcontroller, connect
Ground control module Q is triode, and concrete model SST3904, electromagnetic switch module U2 are relay, is protected first in circuit B
Divider resistance RF1Resistance value be 27K Ω, the second divider resistance RF2Resistance value be 10K Ω, current-limiting resistance RXResistance value be 4.7K Ω,
Biasing resistor RcResistance value be 10K Ω.
If before upspring type key switch K1 is pressed, the power supply signal that power supply line provides is not supplied to mainboard and single-chip microcontroller
Electricity, then after power supply signal upspring type key switch K1 is pressed, and it is in pressing state, the first divider resistance RF1Connection second
Divider resistance RF2Anode-cathode voltage be 3.24V (about 3.3V), it is seen then that the first divider resistance RF1Connect the second divider resistance RF2's
Anode-cathode voltage is slightly less than the operating voltage of single-chip microcontroller, and the power supply signal of 12V passes through upspring type key switch K1, the first divider resistance
RF1With current-limiting resistance RXAfterwards, by first diode D1 (0.5V pressure drop), then pass through current-limiting resistance RXAfter be supplied to triode
Base stage, the base voltage of triode is 2.74V at this time, so that triode ON, such power supply signal passes through in relay
Inductance coil L, biasing resistor RcIt is introduced into ground wire with triode, and the inductance coil L in relay is generated when passing through electric current
Magnetic field so that the noncontacting switch K2 in relay is closed, guarantee the power supply signal of 12V by the noncontacting switch K2 of closure to
Mainboard and single-chip microcontroller power supply, and in order to guarantee single-chip microcontroller work safety, before power supply signal enters single-chip microcontroller, by the power supply of 12V
Signal is converted to the voltage of 3.3V, and powers from the Vcc pin of single-chip microcontroller to single-chip microcontroller, and single-chip microcontroller is direct by IO2 pin at this time
It is predisposed to high level (voltage 3.3V), and passes through current-limiting resistance RXAfter current limliting, triode ON is controlled.Wherein, above-mentioned to bounce
Formula key switch K1 can be bounced at once after pressing, so that upspring type key switch K1 is disconnected；But due in this process,
IO2 pin is directly predisposed to high level by single-chip microcontroller, so that upspring type key switch K1 is when disconnecting, triode still is able to protect
Hold conducting.
And if the power supply signal that power supply line provides is powered to mainboard and single-chip microcontroller before upspring type key switch K1 presses,
So after upspring type key switch K1 is pressed, and it is in pressing state, although the first divider resistance RF1Connection the second partial pressure electricity
Hinder RF2Anode-cathode voltage be 3.24V high level, the IO1 pin of single-chip microcontroller is converted to high level after receiving high level
Low level, control triode shutdown.
It is worth noting that, single-chip microcontroller defaults the output signal of its IO2 pin after the power-up for high electricity in above-described embodiment
It is flat, when the single-chip microcontroller powered on receives high level signal, high level signal can be converted to low level signal and exported, and
When the single-chip microcontroller powered on receives low level signal, the output signal of the IO2 pin of single-chip microcontroller still maintains default conditions, in this way
It can be when powering to mainboard and single-chip microcontroller, after pressing upspring type key switch K1, upspring type key switch K1 is in
State is bounced, although the IO1 pin of single-chip microcontroller receives low level signal, the IO2 pin of single-chip microcontroller still is able to export
High level signal control triode is held on, and when powering to mainboard and single-chip microcontroller, after pressing upspring type key switch K1,
Upspring type key switch K1 is in pressing state, and the IO1 pin of monolithic receives high level signal, and single-chip microcontroller can be by high level
Signal is converted to low level signal, and exports low level signal by IO2 pin and control triode shutdown.
It should be noted that the power supply signal that power supply line provides is not to master before pressing for upspring type key switch K1
Plate and single-chip microcontroller are powered such case, after power supply signal upspring type key switch K1 is pressed, and are in pressing state, and first point
Piezoresistance RF1Connect the second divider resistance RF2Anode-cathode voltage be 3.24V high level, but because single-chip microcontroller do not power on,
So that the first divider resistance RF1Connect the second divider resistance RF2Anode-cathode voltage any control of single-chip microcontroller played will not be made
With.
And in triode ON, the moment that power supply signal is powered to single-chip microcontroller, upspring type key switch K1 has been bounced
(i.e. upspring type key switch K1 disconnection) can not continue to control triode ON.But due to the single-chip microcontroller after powering on can directly by
The output signal of IO2 pin is predisposed to high level, to keep triode ON under upspring type key switch K1 disconnection.
The embodiment of the invention also provides a kind of power control method, the power supply provided using above-mentioned technical proposal
Control circuit, as shown in Figure 1, the power control method includes:
When the power supply signal that power supply line provides is powered to mainboard and signal control module U1, upspring type key switch is pressed
K1, upspring type key switch K1 are in pressing state, the closing letter that upspring type key switch K1 is provided to signal control module U1
Number, signal control module U1 controls ground connection control module Q according to shutdown signal and turns off, so that power supply signal stops to mainboard and letter
Number control module U1 power supply.
Compared with prior art, the beneficial effect and above-mentioned technical proposal of power control method provided in an embodiment of the present invention
The beneficial effect of the power control circuit provided is identical, and this will not be repeated here.
Specifically, as shown in Figure 1, power control method provided by the above embodiment further include:
When the power supply signal that power supply line provides is not powered to mainboard and signal control module U1, presses upspring type key and open
K1 is closed, upspring type key switch K1 is in pressing state, and power supply signal passes through upspring type key switch K1 control ground connection control mould
Block Q conducting, so that power supply signal applies control end and ground connection control module Q importing ground wire by electromagnetic switch module U2；In electricity
Magnetic switch module U2's applies control end when passing through power supply signal, and electromagnetic switch module U2's applies control end control electromagnetic switch module U2's
Controlled end conducting, so that power supply signal is powered by the controlled end of electromagnetic switch module U2 to mainboard and signal control module U1,
Signal control module U1 control ground connection control module Q is held on.
As shown in Figure 1, the embodiment of the invention also provides a kind of display device, the power supply including above-mentioned technical proposal offer
Control circuit.
Compared with prior art, the beneficial effect of display device provided in an embodiment of the present invention and above-mentioned technical proposal provide
Power control circuit beneficial effect it is identical, this will not be repeated here.
Wherein, display device provided by the above embodiment can be mobile phone, tablet computer, television set, display, notebook
Any products or components having a display function such as computer, Digital Frame or navigator.
In the description of above embodiment, particular features, structures, materials, or characteristics can be at any one or more
It can be combined in any suitable manner in a embodiment or example.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of power control circuit characterized by comprising signal control module, ground connection control module, and respectively with electricity
The upspring type key switch and electromagnetic switch module of source line connection；
The power supply line is connect by the upspring type key switch with the input terminal of the signal control module, the power supply line
It is electrically connected by the control end of applying of the electromagnetic switch module with the input terminal of the ground connection control module, the ground connection control module
Output end ground connection；The power supply line is connect with the controlled end of the electromagnetic switch module, the electromagnetic switch module it is controlled
End is for mainboard and signal control module power supply, the output end of the signal control module and the upspring type key to be opened
It closes and is connect respectively with the control terminal of the ground connection control module；The signal control module according to the upspring type key for opening
The state of pass controls the ground connection control module on or off.
2. power control circuit according to claim 1, which is characterized in that the power control circuit further includes at least using
In the protection circuit for protecting the signal control module, the upspring type key switch by the protection circuit respectively with it is described
The control terminal of ground connection control module is connected with the input terminal of the signal control module.
3. power control circuit according to claim 2, which is characterized in that the protection circuit includes the first divider resistance
And the second divider resistance of ground connection；The upspring type key switch, the first divider resistance and the second divider resistance are sequentially connected in series
Together, first divider resistance connects the end input with the signal control module respectively of second divider resistance
It holds and is connected with the control terminal of the ground connection control module.
4. power control circuit according to claim 2, which is characterized in that the power control circuit further includes current limliting electricity
The first diode and the second diode of resistance, biasing resistor and parallel connection；The sun of the protection circuit and the first diode
The cathode of pole connection, the first diode is connect by the current-limiting resistance with the control terminal of the ground connection control module；
The output end of the signal control module is connect with the anode of second diode, and the cathode of second diode is logical
The current-limiting resistance is crossed to connect with the control terminal of the ground connection control module；
The control end of applying of the electromagnetic switch module is connect with the input terminal of the ground connection control module by the second current-limiting resistance.
5. any one power control circuit according to claim 1~4, which is characterized in that the ground connection control module is NPN
Type triode, the upspring type key switch and the signal control module are connect with the base stage of the NPN type triode, described
The controlled end of electromagnetic switch module is connect with the collector of the NPN type triode, and the emitter of the NPN type triode connects
Ground.
6. power control circuit according to any one of claims 1 to 4, which is characterized in that the electromagnetic switch module
Controlled end is connect with the power interface of the signal control module by voltage transformation module.
7. power control circuit according to any one of claims 1 to 4, which is characterized in that the electromagnetic switch module is
Relay；The control end of applying of the electromagnetic switch module is inductance coil, and the power supply line is connect by the inductance coil with described
The input terminal of ground control module connects；
The controlled end of the electromagnetic switch module is noncontacting switch, one end company of the power supply line and the noncontacting switch
It connects, the other end of the noncontacting switch is powered as power output end to mainboard and signal control module.
8. a kind of power control method, which is characterized in that apply the described in any item power control circuits of claim 1~7, institute
Stating power control method includes:
When the power supply signal that power supply line provides is powered to mainboard and signal control module, upspring type key switch, the bullet are pressed
It plays formula key switch and is in pressing state, the shutdown signal that the upspring type key switch is provided to the signal control module,
The signal control module controls ground connection control module shutdown according to the shutdown signal, so that the power supply signal stops to institute
State mainboard and signal control module power supply.
9. power control method according to claim 8, which is characterized in that the power control method further include:
When the power supply signal that the power supply line provides is not powered to mainboard and signal control module, the upspring type key is pressed
Switch, the upspring type key switch are in pressing state, and the power supply signal controls institute by the upspring type key switch
State ground connection control module conducting so that the power supply signal by electromagnetic switch module apply control end and ground connection control module lead
Enter ground wire；The electromagnetic switch module apply control end pass through power supply signal when, the electromagnetic switch module apply control end control
The controlled end of the electromagnetic switch module is connected, so that the power supply signal is by the controlled end of the electromagnetic switch module to master
Plate and the power supply of signal control module, the signal control module control the ground connection control module and are held on.
10. a kind of display device, which is characterized in that including any one of claim 1~7 power control circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710827774.5A CN107358932B (en) | 2017-09-14 | 2017-09-14 | A kind of power control circuit and method, display device |
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| CN201710827774.5A CN107358932B (en) | 2017-09-14 | 2017-09-14 | A kind of power control circuit and method, display device |
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| CN107358932A CN107358932A (en) | 2017-11-17 |
| CN107358932B true CN107358932B (en) | 2019-10-29 |
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| CN201710827774.5A Expired - Fee Related CN107358932B (en) | 2017-09-14 | 2017-09-14 | A kind of power control circuit and method, display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110299122A (en) * | 2019-07-05 | 2019-10-01 | 福州京东方光电科技有限公司 | Display mode control circuit and its driving method, display mode control system |
| CN114610137A (en) * | 2022-03-11 | 2022-06-10 | 冠捷电子科技(福建)有限公司 | Energy-saving control method and energy-saving framework of display |
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| CN201203775Y (en) * | 2008-06-10 | 2009-03-04 | 青岛海信宽带多媒体技术股份有限公司 | Standby control circuit |
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| CN107358932A (en) | 2017-11-17 |
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