CN107358932A - 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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- CN107358932A CN107358932A CN201710827774.5A CN201710827774A CN107358932A CN 107358932 A CN107358932 A CN 107358932A CN 201710827774 A CN201710827774 A CN 201710827774A CN 107358932 A CN107358932 A CN 107358932A
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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 display technology field so that mainboard realizes zero-power, is limited with solving 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 being connected respectively with power line；Power line is connected by upspring type key switch with the input of signal control module, and power line is electrically connected by the control end of applying of electromagnetic switch module with being grounded the input of control module；Power line is connected 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 connected with being grounded the control terminal of control module respectively.The power control method applies above-mentioned power control circuit.Power control circuit provided by the invention is used in display device.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of power control circuit and method, display device.
Background technology
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
All by formulating and implementing Energy Efficiency Standard, promote Energy Efficiency Labeling System to improve the energy efficiency of energy-consuming product, promote energy-conservation skill
Art progress, and then reduce discharge and the environmental protection of nuisance.
Such as：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, the 3rd efficiency grade
Stand-by power consumption be 2W.
And available liquid crystal display, when pressing when switch, the master chip in liquid crystal display on mainboard can control backlight to close
Close, and other external equipments (such as power amplifier chips) are closed, to ensure the power consuming device Close All beyond master chip, 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 typically in 0.2W~0.3W or so, this make it that the master chip power consumption in liquid crystal display must be in certain scope
It is interior, the standby efficiency grade of liquid crystal display can be caused to meet GB21520-2008 regulations.Therefore, liquid crystal display is treated
Function is imitated grade and limited by power consumption possessed by master chip itself.
The content of the invention
It is an object of the invention to provide a kind of power control circuit and method, display device so that mainboard realizes zero power
Consumption, limited with solving the standby efficiency grade of display device by power consumption possessed by master chip itself.
To achieve these goals, the present invention provides following technical scheme：
A kind of power control circuit, including：Signal control module, ground connection control module, and be connected respectively with power line
Upspring type key switch and electromagnetic switch module；
The power line is connected by the upspring type key switch with the input 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 of the ground connection control module, the ground connection control
The output head grounding of module；The power line is connected 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 upsprings
Control terminal of the formula key switch respectively with the ground connection control module is connected；The signal control module is used to upspring according to
The state control ground connection control module on or off of formula key switch.
Compared with prior art, in power control circuit provided by the invention, power line is connected with upspring type key switch,
Upspring type key switch is also connected with being grounded the control terminal of control module, and power line applies control end with connecing by electromagnetic switch module
The input electrical connection of ground control module, it is grounded the output head grounding of control module so that when pressing upspring type key switch, electricity
The power supply signal that source line provides can control ground connection control module to turn on by upspring type key switch；Now, power supply signal is just
It can be imported by the control end of applying of electromagnetic switch module with ground connection control module in ground wire；And due to power line and electromagnetic switch mould
The controlled end connection of block, the controlled end of electromagnetic switch module are used to supply to mainboard and signal control module as power output end
Electricity, therefore, power supply signal by electromagnetic switch module apply control end when, the controlled end of electromagnetic switch module can be opened in electromagnetism
Close 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 ensure that signal control module is powered with control ground connection control module conducting, so that power line continues
To main board power supply.
And when needing standby, can be by pressing upspring type key switch so that upspring type key switch pressed state to
The shutdown signal that signal control module provides, signal control module can control ground connection control module shut-off according to shutdown signal, from
And ensure power supply signal and stop to mainboard and the power supply of signal control module.As can be seen here, when needing standby, it need to only press and upspring
Formula key switch, motherboard power supply line is cut off to main board power supply by power control circuit so that the complete power down of mainboard, with regard to energy
Enough ensure 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.
Present invention also offers a kind of power control method, the described power supply electricity provided using above-mentioned technical proposal
Road, the power control method include：
When the power supply signal that power line provides is to mainboard and the power supply of signal control module, upspring type key switch, institute are pressed
State upspring type key switch and be in pressed state, the upspring type key switch is believed to the closing that the signal control module provides
Number, the signal control module controls ground connection control module to turn off according to the shutdown signal so that the power supply signal stops
Powered to the mainboard and the signal control module.
Compared with prior art, the beneficial effect of power control method provided by the invention provides with above-mentioned technical proposal
The beneficial effect of power control circuit is identical, will not be described here.
Present invention also offers a kind of display device, including the power control circuit that above-mentioned technical proposal provides.
Compared with prior art, the power supply that the beneficial effect of display device provided by the invention provides with above-mentioned technical proposal
The beneficial effect of control circuit is identical, will not be described here.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of power control circuit provided in an embodiment of the present invention.
Reference：
IN- power inputs, OUT- power output ends；
K1- upspring type key switches, U1- signal control modules；
U2- electromagnetic switch modules, L- inductance coils；
K2- noncontacting switches, DC/DC- voltage transformation modules；
B- protection circuits, RF1- the first divider resistance；
RF2- the second divider resistance, RX- current-limiting resistance；
Rc- biasing resistor, Q- ground connection control modules；
The diodes of D1- first, the diodes of D2- second；
A- tie points.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the 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 being connected respectively with power line
U2。
The power input IN of power line is connected by upspring type key switch K1 with signal control module U1 input,
The power input IN of power line is electrically connected by electromagnetic switch module U2 control end of applying with being grounded control module Q input,
It is grounded control module Q output head grounding；Power line is connected with electromagnetic switch module U2 controlled end, electromagnetic switch module U2's
Controlled end is used to power to mainboard and signal control module U1 as power output end OUT, signal control module U1 output end
It is connected respectively with being grounded control module Q control terminal with upspring type key switch K1；Signal control module U1 is used for basis and upspring
Formula key switch K1 state control ground connection control module Q on or off.
The control method of power control circuit provided in an embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
When the power supply signal that power 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 pressed state (i.e. upspring type key switch K1 conductings), 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 to turn off according to shutdown signal, this
Sample power supply signal just can not apply control end by electromagnetic switch module U2 so that electromagnetic switch module U2 controlled end can not be in electricity
Under the magnetic switch module U2 control for applying control end, power supply signal is powered to mainboard and signal control module U1, so as to ensure to cut off
The power supply of mainboard and signal control module U1.And in the state of upspringing at upspring type key switch K1, now power transfer module
Power down, and mainboard keeps power off state.
When the power supply signal that power line provides is not powered to mainboard and signal control module U1, upspring type button is pressed
K1 is switched, upspring type key switch K1 is in pressed state, and power supply signal controls ground connection control by upspring type key switch K1
Module Q is turned on so that power supply signal applies control end and ground connection control module Q importing ground wires by electromagnetic switch module U2's；
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 electromagnetic switch module U2 controlled end 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 upspring
State (i.e. upspring type key switch K1 disconnections), power supply signal can not control ground connection control module by upspring type key switch K1
Q is turned on；But during due at upspring type key switch K1 in pressed state, signal control module U1 control ground connection control moulds
Block Q is held on, and therefore, when upspring type key switch K1, which is in, upsprings state, power supply signal remains able to open by electromagnetism
Module U2 controlled end is closed to mainboard and signal control module U1 continued powers.
Knowable to the concrete structure and implementation process of the power control circuit provided based on above-described embodiment, the embodiment of the present invention
In the power control circuit of offer, power line is connected with upspring type key switch K1, and upspring type key switch K1 is also controlled with ground connection
Molding block Q control terminal connection, power line apply control end with being grounded control module Q input electricity by electromagnetic switch module U2's
Connection, ground connection control module Q output head grounding so that when pressing upspring type key switch K1, the power supply that power line provides is believed
Number ground connection control module Q conducting can be controlled by upspring type key switch K1, so as to ensure that power supply signal passes through electromagnetic switch
Module U2 control end of applying is imported in ground wire with ground connection control module Q；And due to power line and electromagnetic switch module U2 controlled end
Connection, electromagnetic switch module U2 controlled end are used to power to mainboard and signal control module U1 as power output end OUT, because
This, power supply signal by electromagnetic switch module U2 apply control end when, electromagnetic switch module U2 controlled end can be opened in electromagnetism
Close applying for module U2 to control under the control of end so that power supply signal is controlled by electromagnetic switch module U2 control end of applying to mainboard and signal
Module U1 powers, this makes it possible to ensure that signal control module U1 is powered with control ground connection control module Q conductings, so that electric
Source line continues to main board power supply.
, can be by pressing upspring type key switch K1 when needing standby so that upspring type key switch K1 is in pressing shape
The shutdown signal that state provides to signal control module U1, signal control module U1 can control ground connection control module according to shutdown signal
Q is turned off, so as to ensure that power supply signal stops to mainboard and signal control module U1 power supplies.As can be seen here, 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 by power control circuit so that mainboard
Complete power down, it becomes possible to ensure that mainboard realizes zero-power in the standby state, the standby efficiency grade of such display device is just not
It can be limited by power consumption possessed by master chip itself.
And because the standby efficiency grade of display device would not be limited by power consumption possessed by master chip itself, make
Obtain in the master chip on producing mainboard, without considering that standby energy consumption is lost, so as to reduce the production cost of master chip.
It is worth noting that, signal control module U1 can be single-chip microcomputer or other control modules in above-described embodiment, when
When signal control module U1 is single-chip microcomputer, the GND pin ground connection of single-chip microcomputer, the Vcc pins of single-chip microcomputer are as power interface and electricity
Magnetic switch module U2 controlled end connection, the IO1 pins of single-chip microcomputer are connected as input with upspring type key switch K1, monolithic
The IO2 pins of machine are connected as output end with being grounded control module Q control terminal.
When power line is not powered to mainboard and single-chip microcomputer, upspring type key switch K1 is pressed, and upspring type button is opened
Closing K1 and be in pressed state so that power supply signal is powered by the controlled end of electric magnetic card tube module to mainboard and single-chip microcomputer, now,
The voltage that single-chip microcomputer is directly exported the IO2 pins as output end is predisposed to high level.
And when power line is powered to mainboard and single-chip microcomputer, because single-chip microcomputer is in power-up state, now press upspring type
Key switch K1, and upspring type key switch K1 is in pressed 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 microcomputer as input, single-chip microcomputer is converted to high level low
Level, export and give ground connection control module Q, with shut-off ground connection control module Q.
It should be noted that above-mentioned electromagnetic switch module U2 wide variety is various, as shown in figure 1, electromagnetic switch module
U2 can be relay, and the control end of applying in relay be inductance coil L, and controlled end is noncontacting switch K2, and inductance coil L is leading to
When electric, noncontacting switch K2 is enabled to turn on, therefore, when above-mentioned electromagnetic switch module U2 is relay, power line passes through
The inductance coil L is connected with being grounded control module Q input；Power line is connected with noncontacting switch K2 one end, oncontacting
The point switch K2 other end 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 turned on, inductance coil L just has power supply signal by the way that i.e. inductance coil L has electric current to pass through so that contactless
Switch K2 is closed under magnetic field caused by inductance coil L, and such power supply signal just can be by noncontacting switch K2 to mainboard
Powered with signal control module U1.
And in order to ensure the stability and security of signal control module U1 work, above-described embodiment is in electromagnetic switch module
U2 controlled end is connected with signal control module U1 power interface by voltage transformation module DC/DC, with electromagnetic switch mould
The block U2 controlled end for applying control end control electromagnetic switch module U2 so that power supply signal is powered to mainboard and signal control module U1
When, power supply signal is changed by voltage transformation module DC/DC so that the voltage of power supply signal is in signal control module U1
Operating voltage, to ensure signal control module U1 job stability and security.
Further, as shown in figure 1, the power control circuit that above-described embodiment provides also includes protection circuit B, upspring type is pressed
Key switch K1 is connected with being grounded control module Q control terminal and signal control module U1 input respectively by protection circuit B,
To be at least used for protection signal control module U1 by protection circuit B.
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 with signal control module U1 respectively
It is connected with ground connection control module Q control terminal, and the first divider resistance RF1Connect the second divider resistance RF2Anode-cathode voltage should
When the operating voltage no more than signal control module U1.
Such as：As shown in figure 1, signal control module U1 is single-chip microcomputer, its operating voltage is 3.3V or 5V, in single-chip microcomputer
Operating voltage is 3V, and power supply signal voltage is 12V, the first divider resistance RF1Resistance be 27K Ω, the second divider resistance RF2's
Resistance is 10K Ω, now, 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, so as to protect
Card single-chip microcomputer is operated in safe voltage.
Meanwhile 12V power supply signal carries out voltage by voltage transformation module DC/DC and turned after noncontacting switch K2
Change, the voltage of power supply signal is down to 3.3V, there is provided to single-chip microcomputer, the output end voltage of single-chip microcomputer is predisposed to about by single-chip microcomputer
3.3V high level, to cause single-chip microcomputer control ground connection control module Q conductings.
In addition, the first divider resistance R in above-described embodimentF1, the second divider resistance RF2Resistance sizes be to be controlled by signal
What module U1 operating voltage size determined.And consider the first divider resistance RF1Connect the second divider resistance RF2End not
Input only with signal control module U1 is connected, but also the control terminal with being grounded control module Q is connected, and this causes first
Divider resistance RF1, the second divider resistance RF2When flowing through electric current, the Q conductings of ground connection control module can be controlled.
And cause ground connection control module Q 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 connected with the control terminal for being grounded control module Q, to avoid being grounded control module Q control terminal and collection
Electrode current is excessive；And current-limiting resistance RXDuring current limliting, it is necessary to the first divider resistance R in protection circuit BF1With the second partial pressure electricity
Hinder RF2Coordinated, it just can guarantee that ground connection control module Q electric current is in safe range, and can be in ground connection control module
When Q needs conducting, ensure to be supplied to the voltage of ground connection control module Q control terminals to enable to be grounded control module Q conductings.
And electromagnetic switch module U2 control end of applying passes through biasing resistor R in above-described embodimentcWith being grounded the defeated of control module Q
Enter end connection so that biasing resistor RcThe input electric current into ground connection control module Q can be limited, ensures ground connection control module
Q normal works.
Exemplary, above-mentioned ground connection control module Q is NPN type triode, now upspring type key switch K1 and signal control
The base stage of molding block U1 and NPN type triode connects, and electromagnetic switch module U2 controlled end and the colelctor electrode of NPN type triode connect
Connect, the grounded emitter of NPN type triode；Upspring type key switch K1 and signal control module U1 pass through current-limiting resistance RXRespectively
It is connected with the base stage of NPN type triode, electromagnetic switch module U2 controlled end passes through biasing resistor RcWith ground connection control module Q's
Colelctor electrode connects.Now, 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 conducting state.
Further, it is contemplated that signal control module U1 output end and upspring type key switch K1 controls mould with ground connection respectively
Block Q control terminal connection so that power supply signal controls ground connection control module Q to turn on by upspring type key switch K1, easily makes
Electric current recharge is obtained to signal control module U1, and the Q conductings of ground connection control module are controlled in signal control module U1, easily so that electricity
Flow back to and be poured into upspring type key switch K1 institutes in the loop；Based on this, referring to Fig. 1, the power supply that above-described embodiment provides
Circuit also includes the first diode D1 in parallel and the second diode D2, protection circuit B are connected with the first diode D1 anode,
First diode D1 negative electrode passes through current-limiting resistance RXIt is connected with the control terminal for being grounded control module Q, and signal control module
Output end is connected with the second diode D2 anode, and the second diode D2 negative electrode passes through current-limiting resistance RXWith being grounded control module
Q control terminal connection.Based on the structure, when upspring type key switch K1 is pressed, and pressed state is in, power supply signal passes through guarantor
Protection circuit B, the first diode D1, current-limiting resistance RXDuring control ground connection control module Q conductings, the second diode D2 can prevent electricity
Flow back to and be poured into signal control module U1；And when being upspring after upspring type key switch K1 is pressed, signal control module U1 controls
When being grounded control module Q conductings, the first diode D1 can avoid the electric current recharge into protection circuit B.
Exemplary, the embodiments of the invention provide a kind of power control circuit as shown in Figure 1, the power control circuit
Structure referring to above, wherein power line voltage is 12V, signal control module U1 be operating voltage be 3.3V single-chip microcomputer, connect
Ground control module Q is triode, and concrete model SST3904, electromagnetic switch module U2 are relay, first in protection circuit B
Divider resistance RF1Resistance be 27K Ω, the second divider resistance RF2Resistance be 10K Ω, current-limiting resistance RXResistance be 4.7K Ω,
Biasing resistor RcResistance be 10K Ω.
Before if upspring type key switch K1 is pressed, the power supply signal that power line provides does not supply to mainboard and single-chip microcomputer
Electricity, then after power supply signal upspring type key switch K1 is pressed, and be in pressed 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 microcomputer, and 12V power supply signal passes through upspring type key switch K1, the first divider resistance
RF1With current-limiting resistance RXAfterwards, by the first diode D1 (0.5V pressure drops), current-limiting resistance R is then passed throughXAfter be supplied to triode
Base stage, now the base voltage of triode is 2.74V so that triode ON, such power supply signal pass through in relay
Inductance coil L, biasing resistor RcIt is introduced into triode in ground wire, and the inductance coil L in relay produces when passing through electric current
Magnetic field so that the noncontacting switch K2 closures in relay, ensure 12V power supply signal by the noncontacting switch K2 of closure to
Mainboard and single-chip microcomputer power supply, and in order to ensure single-chip microcomputer work safety, before power supply signal enters single-chip microcomputer, by 12V power supply
Signal is converted to 3.3V voltage, and is powered from the Vcc pins of single-chip microcomputer to single-chip microcomputer, and single-chip microcomputer is now direct by IO2 pins
High level (voltage 3.3V) is predisposed to, and by current-limiting resistance RXAfter current limliting, triode ON is controlled.Wherein, it is above-mentioned to upspring
Formula key switch K1 can upspring at once after pressing so that upspring type key switch K1 disconnects；But due in this process,
IO2 pins are directly predisposed to high level by single-chip microcomputer so that when disconnecting, triode remains able to protect upspring type key switch K1
Hold conducting.
And if before upspring type key switch K1 presses, the power supply signal that power line provides is powered to mainboard and single-chip microcomputer,
So after upspring type key switch K1 is pressed, and pressed state is in, although the first divider resistance RF1Connect the second partial pressure electricity
Hinder RF2Anode-cathode voltage be 3.24V high level, the IO1 pins of single-chip microcomputer are converted to high level after high level is received
Low level, control triode shut-off.
It is worth noting that, the output signal that single-chip microcomputer gives tacit consent to its IO2 pin after the power-up in above-described embodiment is high electricity
It is flat, when upper electric single-chip microcomputer receives high level signal, high level signal can be converted to low level signal and exported, and
When upper electric single-chip microcomputer receives low level signal, the output signal of the IO2 pins of single-chip microcomputer remains in that default conditions, so
Just can be when not powered to mainboard and single-chip microcomputer, after pressing upspring type key switch K1, upspring type key switch K1 is in
Upspring state, although the IO1 pins of single-chip microcomputer receive low level signal, the IO2 pins of single-chip microcomputer remain able to export
High level signal control triode is held on, and when to mainboard and single-chip microcomputer power supply, after pressing upspring type key switch K1,
Upspring type key switch K1 is in pressed state, and the IO1 pins of monolithic receive high level signal, and single-chip microcomputer can be by high level
Signal is converted to low level signal, and exports low level signal by IO2 pins and control triode to turn off.
It should be noted that before being pressed for upspring type key switch K1, the power supply signal that power line provides is not to master
Plate and single-chip microcomputer are powered such case, after power supply signal upspring type key switch K1 is pressed, and are in pressed state, first point
Piezoresistance RF1Connect the second divider resistance RF2Anode-cathode voltage be 3.24V high level, but because the upper electricity of single-chip microcomputer,
So that the first divider resistance RF1Connect the second divider resistance RF2Anode-cathode voltage will not to single-chip microcomputer play it is any control make
With.
And in triode ON, the moment that power supply signal is powered to single-chip microcomputer, upspring type key switch K1 has upspring
(i.e. upspring type key switch K1 disconnections), it can not continue to control triode ON.But due to it is upper electricity after single-chip microcomputer can directly by
The output signal of IO2 pins is predisposed to high level, under upspring type key switch K1 disconnections, to keep triode ON.
The embodiment of the present invention additionally provides a kind of power control method, the described 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 line provides is to mainboard and signal control module U1 power supplies, upspring type key switch is pressed
K1, upspring type key switch K1 are in pressed state, and upspring type key switch K1 believes to the closing that signal control module U1 is provided
Number, signal control module U1 controls ground connection control module Q to turn off according to shutdown signal 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 described power control circuit provided is identical, will not be described here.
Specifically, as shown in figure 1, the power control method that above-described embodiment provides also includes：
When the power supply signal that power line provides is not powered to mainboard and signal control module U1, press upspring type button and open
K1 is closed, upspring type key switch K1 is in pressed state, and power supply signal controls ground connection control mould by upspring type key switch K1
Block Q is turned on so that power supply signal applies control end and ground connection control module Q importing ground wires by electromagnetic switch module U2's；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 turns on so that and power supply signal is powered by electromagnetic switch module U2 controlled end 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 present invention additionally provides a kind of display device, including the power supply that above-mentioned technical proposal provides
Control circuit.
Compared with prior art, the beneficial effect of display device provided in an embodiment of the present invention provides with above-mentioned technical proposal
Power control circuit beneficial effect it is identical, will not be described here.
Wherein, the display device that above-described embodiment provides can be mobile phone, tablet personal computer, television set, display, notebook
Any product or part with display function such as computer, DPF or navigator.
In the description of above-mentioned embodiment, specific features, structure, material or feature can be in any one or more
Combined in an appropriate manner in individual embodiment or example.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover 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)
- A kind of 1. power control circuit, it is characterised in that including：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 line is connected by the upspring type key switch with the input of the signal control module, the power line Electrically connected by the control end of applying of the electromagnetic switch module with the input of the ground connection control module, the ground connection control module Output head grounding；The power line is connected with the controlled end of the electromagnetic switch module, the electromagnetic switch module it is controlled Hold for being powered to the mainboard and the signal control module, the output end of the signal control module and the upspring type are pressed Control terminal of the key switch respectively with the ground connection control module is connected；The signal control module is used to be pressed according to the upspring type The state control ground connection control module on or off of key switch.
- 2. power control circuit according to claim 1, it is characterised in that the power control circuit also 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 connects with the input of the signal control module.
- 3. power control circuit according to claim 2, it is characterised 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 The control terminal with the ground connection control module is held to be connected.
- 4. power control circuit according to claim 2, it is characterised in that the power control circuit also includes current limliting electricity The first diode and the second diode of resistance, biasing resistor and parallel connection；The protection circuit and the sun of first diode Pole is connected, and the negative electrode of first diode is connected by the current-limiting resistance with the control terminal of the ground connection control module；The output end of the signal control module is connected with the anode of second diode, and the negative electrode of second diode leads to The control terminal that the current-limiting resistance is crossed with the ground connection control module is connected；The control end of applying of the electromagnetic switch module is connected with the input of the ground connection control module by the second current-limiting resistance.
- 5. according to any one of Claims 1 to 4 power control circuit, it is characterised in that the ground connection control module is NPN Type triode, the upspring type key switch and the signal control module are connected with the base stage of the NPN type triode, described The controlled end of electromagnetic switch module is connected with the colelctor electrode of the NPN type triode, and the emitter stage of the NPN type triode connects Ground.
- 6. according to the power control circuit described in any one of Claims 1 to 4, it is characterised in that the electromagnetic switch module Controlled end is connected with the power interface of the signal control module by voltage transformation module.
- 7. according to the power control circuit described in any one of Claims 1 to 4, it is characterised in that the electromagnetic switch module is Relay；The control end of applying of the electromagnetic switch module is inductance coil, and the power line is connect by the inductance coil with described The input connection of ground control module；The controlled end of the electromagnetic switch module is noncontacting switch, and one end of the power line and the noncontacting switch connects Connect, 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, it is characterised in that using the power control circuit described in any one of claim 1~7, institute Stating power control method includes：When the power supply signal that power line provides is to mainboard and the power supply of signal control module, upspring type key switch, the bullet are pressed Play formula key switch and be in pressed state, the shutdown signal that the upspring type key switch provides to the signal control module, The signal control module controls ground connection control module shut-off 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, it is characterised in that the power control method also includes：When the power supply signal that the power line provides is not powered to mainboard and signal control module, the upspring type button is pressed Switch, the upspring type key switch are in pressed 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 is led by applying control end and being grounded control module for electromagnetic switch module 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 conducting of the electromagnetic switch module 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 ground connection control module are held on.
- 10. a kind of display device, it is characterised 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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| 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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| CN107358932A true CN107358932A (en) | 2017-11-17 |
| CN107358932B CN107358932B (en) | 2019-10-29 |
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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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Also Published As
| Publication number | Publication date |
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| CN107358932B (en) | 2019-10-29 |
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