CN108469869A - Upper electric control unit, method, power circuit and display device - Google Patents
Upper electric control unit, method, power circuit and display device Download PDFInfo
- Publication number
- CN108469869A CN108469869A CN201810320205.6A CN201810320205A CN108469869A CN 108469869 A CN108469869 A CN 108469869A CN 201810320205 A CN201810320205 A CN 201810320205A CN 108469869 A CN108469869 A CN 108469869A
- Authority
- CN
- China
- Prior art keywords
- voltage
- input
- connect
- delay
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/625—Regulating voltage or current wherein it is irrelevant whether the variable actually regulated is ac or dc
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Direct Current Feeding And Distribution (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
A kind of upper electric control unit of present invention offer, method, power circuit and display device.The upper electric control unit, including：Input voltage judgment sub-unit for detecting input voltage, and starts timing when determining the input voltage more than predetermined voltage, is controlled after the predetermined time to input Enable Pin and exports the first level；And upper electric control subelement, for when the current potential of the current potential and input Enable Pin that power on Enable Pin while sending voltage changeover control signal to be controlled when the first level to the control terminal of voltage conversion control unit.The present invention solve the problem of power circuit caused by being input to the input voltage of power circuit there are the rise time due to system end in the prior art carry out power supply conversion when input voltage does not rise complete and caused by the display that exports malfunctioned so as to cause corresponding display panel with voltage is inaccurate.
Description
Technical field
The present invention relates to voltage switch technology field more particularly to a kind of upper electric control unit, method, power circuits and aobvious
Showing device.
Background technology
When in use, can define the rise time specification of the input voltage of system end input makes general display panel to system
With, once system is using not to be noted this partial specification, it is more likely that lead to the malfunction of display panel.In the prior art,
Can exist system end because match different manufacturers display panel due to generation timing sequence mistake generate it is various bad.That is, existing
In technology, the voltage shift control module that power circuit includes controls power supply when the current potential for powering on Enable Pin is the first level
The voltage transformation module that circuit includes carries out voltage conversion to input voltage, to obtain each display voltage.But due to input
The presence of the rise time of voltage will produce and not rise complete power circuit in input voltage and carry out voltage turn
It changes, it is inaccurate so as to cause each display voltage for being sent to display panel, to display panel be caused to malfunction.
Invention content
The main purpose of the present invention is to provide a kind of upper electric control unit, method, power circuit and display devices, solve
Power circuit is defeated caused by being input to the input voltage of power circuit there are the rise time due to system end in the prior art
Enter when voltage does not rise complete to carry out power supply conversion and caused by the display voltage inaccuracy that exports, so as to cause corresponding
The problem of display panel malfunctions.
In order to achieve the above object, the present invention provides a kind of upper electric control units, are applied to power circuit, the power supply
Circuit includes voltage conversion unit and voltage conversion control unit；The voltage conversion unit is connect with Input voltage terminal；It is described
Upper electric control unit includes：
Input voltage judgment sub-unit is connect with the Input voltage terminal and input Enable Pin, for detecting by described defeated
Enter the input voltage of voltage end input, and start timing when determining the input voltage more than predetermined voltage, by pre- timing
Between after control to the input Enable Pin export the first level；And
Upper electric control subelement, and the control terminal of voltage conversion control unit, the input Enable Pin and powers on Enable Pin
Connection, for when the current potential for powering on Enable Pin and the current potential of the input Enable Pin while to be controlled when the first level to institute
The control terminal for stating voltage conversion control unit sends voltage changeover control signal.
When implementation, the input voltage judgment sub-unit includes division module, comparison module and time delay module；
The division module is connect with the Input voltage terminal and branch pressure voltage end, for dividing the input voltage
Pressure to obtain branch pressure voltage, and exports the branch pressure voltage by the branch pressure voltage end；
The comparison module is connect with the branch pressure voltage end and delay input terminal, for the branch pressure voltage and in advance
It is controlled when determining reference voltage, and the branch pressure voltage will be compared less than or equal to the predetermined reference voltage defeated to the delay
Enter end output second electrical level signal, is controlled to the delay when comparing the branch pressure voltage more than the predetermined reference voltage
Input terminal exports the first level signal；
The time delay module is connect with the delay input terminal with the input Enable Pin, for that will be inputted by the delay
The predetermined delay time of signal delay of end input, to obtain input enable signal, and by described in input Enable Pin output
Input enable signal.
When implementation, the division module includes the first divider resistance and the second divider resistance；
The first end of first divider resistance is connect with the Input voltage terminal, the second end of first divider resistance
It is connect with the branch pressure voltage end；
The first end of second divider resistance is connect with the second end of first divider resistance, the second partial pressure electricity
The second end of resistance is connect with low-voltage input terminal；
The comparison module includes：Comparator, normal phase input end are connect with the branch pressure voltage end, inverting input and base
Quasi- voltage end connection, output end are connect with the delay input terminal；
The reference voltage terminal is for exporting the predetermined reference voltage.
When implementation, the input voltage judgment sub-unit is sentenced including the first input voltage judgment module, the second input voltage
Disconnected module and input make energy control module；
The first input voltage judgment module includes the first partial pressure submodule, the first comparison sub-module and the first delay
Module；
The second input voltage judgment module includes the second partial pressure submodule, the second comparison sub-module and the second delay
Module；
The first partial pressure submodule is connect with the Input voltage terminal and the first branch pressure voltage end, for the input
Voltage is divided, and to obtain the first branch pressure voltage, and exports first branch pressure voltage by first branch pressure voltage end；
First comparison sub-module is connect with first branch pressure voltage end and the first delay input terminal, for comparing
The first branch pressure voltage and the first predetermined reference voltage are stated, and first branch pressure voltage will be compared and be less than or equal to described first
It is controlled when predetermined reference voltage to the first delay input terminal and exports second electrical level signal, first partial pressure is electric when comparing
Pressure controls to the first delay input terminal when being more than first predetermined reference voltage and exports the first level signal；
The first delay submodule is connect with the first delay input terminal with the first control Enable Pin, and being used for will be by institute
Signal the first predetermined delay time of delay for stating the input of the first delay input terminal, to obtain the first control enable signal, and passes through
First control Enable Pin output the first control enable signal；
The second partial pressure submodule is connect with the Input voltage terminal and the second branch pressure voltage end, for the input
Voltage is divided, and to obtain the second branch pressure voltage, and exports second branch pressure voltage by second branch pressure voltage end；
Second comparison sub-module is connect with second branch pressure voltage end and the second delay input terminal, for comparing
The second branch pressure voltage and the second predetermined reference voltage are stated, and second branch pressure voltage will be compared and be less than or equal to described second
It is controlled when predetermined reference voltage to the second delay input terminal and exports second electrical level signal, second partial pressure is electric when comparing
Pressure controls to the second delay input terminal when being more than second predetermined reference voltage and exports the first level signal；
The second delay submodule is connect with the second delay input terminal with the second control Enable Pin, and being used for will be by institute
Signal the second predetermined delay time of delay for stating the input of the second delay input terminal, to obtain the second control enable signal, and passes through
Second control Enable Pin output the second control enable signal；
The input makes energy control module control Enable Pin, the second control Enable Pin and the input with described first
Enable Pin connects, and the current potential of current potential and the second control Enable Pin for controlling Enable Pin when described first is all the first electricity
The current potential for usually controlling the input Enable Pin is the first level, when the current potential and/or described the of the first control Enable Pin
The current potential of two control Enable Pins controls input Enable Pin current potential when being second electrical level is second electrical level.
When implementation, the first partial pressure submodule includes the first divider resistance and the second divider resistance；
The first end of first divider resistance is connect with the Input voltage terminal, the second end of first divider resistance
It is connect with first branch pressure voltage end；
The first end of second divider resistance is connect with the second end of first divider resistance, the second partial pressure electricity
The second end of resistance is connect with the first low-voltage input terminal；
First comparison sub-module includes：First comparator, normal phase input end are connect with first branch pressure voltage end,
Inverting input is connect with the first reference voltage terminal, and output end is connect with the first delay input terminal；
First reference voltage terminal is for exporting first predetermined reference voltage；
The second partial pressure submodule includes third divider resistance and the 4th divider resistance；
The first end of the third divider resistance is connect with the Input voltage terminal, the second end of the third divider resistance
It is connect with second branch pressure voltage end；
The first end of 4th divider resistance is connect with the second end of the third divider resistance, the 4th partial pressure electricity
The second end of resistance is connect with the second low-voltage input terminal；
Second comparison sub-module includes：Second comparator, normal phase input end are connect with second branch pressure voltage end,
Inverting input is connect with the second reference voltage terminal, and output end is connect with the second delay input terminal；
Second reference voltage terminal is for exporting second predetermined reference voltage；
The input makes the energy control module include：The enabled control of input and door, first input end make with first control
The connection of energy end, the second input terminal are connect with the second control Enable Pin, and output end is connect with the input Enable Pin.
When implementation, the first input voltage judgment module further includes that the first spike filters out submodule；
First spike filters out submodule and is set to the output end of the first comparator and the first delay input
Between end, the signal for being used for the output end output to the first comparator carries out deglitch processing, and will be obtained after processing
To signal be sent to it is described first delay input terminal；
The second input voltage judgment module further includes that the second spike filters out submodule；
Second spike filters out submodule and is set to the output end of second comparator and the second delay input
Between end, the signal for being used for the output end output to second comparator carries out deglitch processing, and will be obtained after processing
To signal be sent to it is described second delay input terminal.
When implementation, the upper electric control subelement includes：
Upper electric control and door, first input end are connect with the Enable Pin that powers on, and the second input terminal and the input are enabled
End connection, output end are connect with the control terminal of the voltage conversion control unit.
The present invention also provides a kind of electrification control methods, are applied to above-mentioned upper electric control unit, the upper electric control
Method includes：
Input voltage judgment sub-unit detects the input voltage inputted by Input voltage terminal, and works as and determine the input voltage
Start timing when more than predetermined voltage, is controlled after the predetermined time to input Enable Pin and export the first level；
When the current potential that powers on Enable Pin and the current potential of the input Enable Pin simultaneously for the first level when, upper electric control is singly
The control terminal that member controls the voltage conversion control unit for including to power circuit sends voltage changeover control signal.
Further include above-mentioned upper electric control the present invention also provides a kind of power circuit, including voltage conversion control unit
Unit；The upper electric control subelement that the upper electric control unit includes is connect with the control terminal of the voltage conversion control unit.
The present invention also provides a kind of display devices, including the upper power circuit.
Compared with prior art, upper electric control unit, method, power circuit and display device of the present invention can make
Electricity must just be passed through after input voltage is risen to high voltage (namely input voltage reaches the stable state of setting voltage) by low-voltage
Pressure TCU transfer control unit control voltage conversion unit obtains multiple and different display voltage to carrying out voltage conversion, so that
It is accurate that power circuit exports the display voltage to display panel.
Description of the drawings
Fig. 1 is the structure diagram of the upper electric control unit described in the embodiment of the present invention；
Fig. 2 is the structure chart of the first specific embodiment of upper electric control unit of the present invention；
Fig. 3 is the circuit diagram of the second specific embodiment of upper electric control unit of the present invention；
Fig. 4 is the structure chart of the third specific embodiment of upper electric control unit of the present invention；
Fig. 5 is the circuit diagram of the 4th specific embodiment of upper electric control unit of the present invention；
Fig. 6 is the working timing figure of the 4th specific embodiment of upper electric control unit of the present invention；
Fig. 7 is the structure chart of the display device described in the embodiment of the present invention.
Specific implementation mode
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 describes, 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.
Upper electric control unit described in the embodiment of the present invention is applied to power circuit, as shown in Figure 1, the power circuit
Including voltage conversion unit 101 and voltage conversion control unit 102；The voltage conversion unit 101 and Input voltage terminal Vin-T
Connection；The upper electric control unit includes：
Input voltage judgment sub-unit 11 is connect with the Input voltage terminal Vin-T and input Enable Pin EN, for detecting
The input voltage vin inputted by the Input voltage terminal Vin-T, and when determining the input voltage vin more than predetermined voltage
Start timing, is controlled after the predetermined time to the input Enable Pin EN and export the first level；And
Upper electric control subelement 12, and the control terminal of voltage conversion control unit 102, the input Enable Pin EN and powers on
Enable Pin Enable connections, the current potential of current potential and the input Enable Pin EN for powering on Enable Pin Enable described in is simultaneously
Voltage changeover control signal is sent to be controlled when the first level to the control terminal of the voltage conversion control unit 102.
In practical operation, the voltage value of the predetermined voltage and the predetermined time can be selected according to actual conditions.
In practical operation, the instruction voltage conversion control unit 102 that Enable Pin Enable is the prior art is powered on
The terminal of voltage conversion and control is proceeded by, the upper electric control unit described in the embodiment of the present invention increases an input Enable Pin
EN determines Vin by low-voltage after input voltage judgment sub-unit 11 determines Vin for a period of time more than predetermined voltage
It is upgraded to high voltage (namely Vin reaches the stable state of setting voltage) just to be controlled later to input Enable Pin EN the first level of output, make
The current potential for obtaining EN is the first level, and upper electric control subelement 12 is simultaneously the first level in the current potential of Enable and the current potential of EN
When just to the control terminal of the voltage conversion control unit 102 send voltage changeover control signal so that the voltage
TCU transfer control unit 102 controls voltage conversion unit 101 and carries out voltage conversion to Vin, is used to export multiple and different displays
Voltage.
Upper electric control unit described in the embodiment of the present invention enables to rise to high electricity by low-voltage in input voltage vin
Pressure just controls voltage conversion unit pair after (namely Vin reaches the stable state of setting voltage) by voltage conversion control unit 102
Vin carries out voltage conversion and obtains multiple and different display voltage, to avoid power circuit existing in the prior art from existing
Carry out power supply conversion when input voltage vin does not rise complete and caused by the display that exports voltage inaccuracy, so as to cause
The problem of corresponding display panel malfunction.
In the specific embodiment below the present invention, first level is high level.It is described but in practical operation
First level may be low level, accordingly change specific circuit structure.
According to a kind of specific implementation mode, as shown in Fig. 2, the input voltage judgment sub-unit may include division module
21, comparison module 22 and time delay module 23；The division module 21 and the Input voltage terminal Vin-T and branch pressure voltage end
Vset-T connections to obtain branch pressure voltage, and pass through the branch pressure voltage end for being divided to the input voltage vin
Vset-T exports the branch pressure voltage；
The comparison module 22 is connect with the branch pressure voltage end Vset-T and delay input terminal Din, described in comparing
Branch pressure voltage and predetermined reference voltage, and will compare when the branch pressure voltage is less than or equal to the predetermined reference voltage and control
Second electrical level signal is exported to the delay input terminal Din, is more than the predetermined reference voltage when comparing the branch pressure voltage
When control to the delay input terminal Din export the first level signal；
The time delay module 23 is connect with the delay input terminal Din with the input Enable Pin EN, and being used for will be by described
The predetermined delay time of signal delay that the input terminal Din that is delayed is inputted, to obtain input enable signal, and it is enabled by the input
EN is held to export the input enable signal.
In practical operation, the voltage value of the predetermined reference voltage and the predetermined delay time can be according to practical feelings
Condition is selected, and first level signal can be high level signal, and the second electrical level signal can be low level signal, but not
It is limited to this.
The specific embodiment of the present invention upper electric control unit as shown in Figure 2 at work, by division module 21 to defeated
Enter voltage Vin to be divided, obtain branch pressure voltage, when comparison module 22 compares to obtain branch pressure voltage more than predetermined reference voltage
The first level signal is exported to delay input terminal Din, the signal inputted by delay input terminal Din is delayed predetermined by time delay module 23
Delay time thereby may be ensured that Vin reaches setting voltage to obtain output to the input enable signal of input Enable Pin EN
When stable state namely Vin is risen to the voltage conversion unit 101 and electricity that just notice power circuit includes after high voltage by low-voltage
It presses TCU transfer control unit 102 to carry out voltage conversion operation, avoids showing caused by the rise time for not considering Vin in the prior art
Show the problem with voltage inaccuracy.
Specifically, as shown in figure 3, on the basis of the specific embodiment of upper electric control unit as shown in Figure 2, described point
Die block 21 includes the first divider resistance R1 and the second divider resistance R2；
The first end of the first divider resistance R1 is connect with the Input voltage terminal Vin-T, first divider resistance
The second end of R1 is connect with the branch pressure voltage end Vset-T；
The first end of the second divider resistance R2 is connect with the second end of the first divider resistance R1, described second point
The second end of piezoresistance R2 is connect with the low-voltage input terminal of input low-voltage VSS；
The comparison module 22 may include：Comparator DC, normal phase input end are connect with the branch pressure voltage end Vset-T,
Inverting input is connect with reference voltage terminal, and output end is connect with the delay input terminal Din；
The reference voltage terminal is for exporting the predetermined reference voltage Vref.
The specific embodiment of the present invention upper electric control unit as shown in Figure 3 at work, includes the partial pressure mould of R1 and R2
Block 21 divides Vin, and when the Vset of the normal phase input end access of comparator DC is more than Vref, DC exports high level signal,
The signal that time delay module exports DC is into output after line delay to EN.
According to another specific implementation mode, as shown in figure 4, the input voltage judgment sub-unit includes the first input electricity
Pressure judgment module, the second input voltage judgment module and input make energy control module 40；
The first input voltage judgment module includes the first partial pressure submodule 411, the first comparison sub-module 412 and first
Be delayed submodule 413；
The second input voltage judgment module includes the second partial pressure submodule 421, the second comparison sub-module 422 and second
Be delayed submodule 423；
The first partial pressure submodule 411 connects with the Input voltage terminal Vin-T and the first branch pressure voltage end Vset1-T
It connects, for being divided to the input voltage vin, to obtain the first branch pressure voltage Vset1, and passes through the first partial pressure electricity
Pressure side Vset1-T exports the first branch pressure voltage Vset1；
The delay input terminals of first comparison sub-module 412 and first branch pressure voltage end Vset1-T and first Din1
Connection is used for the first branch pressure voltage Vset1 and the first predetermined reference voltage Vref1, and will compare described first
Branch pressure voltage Vset1 is controlled when being less than or equal to the first predetermined reference voltage Vref1 to the first delay input terminal
Din1 exports second electrical level signal, is more than first predetermined reference voltage when comparing the first branch pressure voltage Vset1
It is controlled when Vref1 to the first delay input terminal Din1 and exports the first level signal；
The first delay submodule 413 is connect with the first delay input terminal Din1 with the first control Enable Pin EN1,
Signal the first predetermined delay time T1 of delay for will be inputted by the first delay input terminal Din1, to obtain the first control
Enable signal, and control Enable Pin EN1 by described first and export the first control enable signal；
The second partial pressure submodule 421 connects with the Input voltage terminal Vin-T and the second branch pressure voltage end Vset2-T
It connects, for being divided to the input voltage vin, to obtain the second branch pressure voltage Vset2, and passes through the second partial pressure electricity
Pressure side Vset2-T exports second branch pressure voltage；
The delay input terminals of second comparison sub-module 422 and second branch pressure voltage end Vset2-T and second Din2
Connection is used for the second branch pressure voltage Vset2 and the second predetermined reference voltage Vref2, and will compare described second
Branch pressure voltage Vset2 is controlled when being less than or equal to the second predetermined reference voltage Vref2 to the second delay input terminal
Din2 exports second electrical level signal, is more than second predetermined reference voltage when comparing the second branch pressure voltage Vset2
It is controlled when Vref2 to the second delay input terminal Din2 and exports the first level signal；
The second delay submodule 423 is connect with the second delay input terminal Din2 with the second control Enable Pin EN2,
Signal the second predetermined delay time T2 of delay for will be inputted by the second delay input terminal Din2, to obtain the second control
Enable signal, and control Enable Pin EN2 by described second and export the second control enable signal；
The input make energy control module 40 with described first control Enable Pin EN1, the second control Enable Pin EN2 and
The input Enable Pin EN connections, the current potential for controlling Enable Pin EN1 when described first and the second control Enable Pin EN2
Current potential to control the current potential of the input Enable Pin EN when being all the first level be the first level, when the first control Enable Pin
The current potential of the current potential of EN1 and/or the second control Enable Pin EN2 control the electricity of the input Enable Pin EN when being second electrical level
Position is second electrical level.
In present invention specific embodiment as shown in Figure 4, the first level signal can be high level signal, second electrical level
Signal can be low level signal, and the first level can be high level, and second electrical level can be low level, and but not limited to this.
Present invention specific embodiment as shown in Figure 4 at work, the first input voltage judgment module include first point
Pressure submodule 411 divides the input voltage vin, to obtain the first branch pressure voltage Vset1, when the first input voltage is sentenced
The first comparison sub-module 412 that disconnected module includes compares to obtain the first branch pressure voltage Vset1 more than the first predetermined benchmark electricity
It is controlled when pressing Vref1 to the first delay input terminal Din1 and exports the first level signal；First input voltage judgment module packet
The signal delay first for being delayed input terminal Din1 inputs by described first is made a reservation for delay by the first delay submodule 413 included
Time T1, to obtain exporting to the first control enable signal of the first control Enable Pin EN1；Second input voltage judgment module packet
The the second partial pressure submodule 421 included divides the input voltage vin, to obtain the second branch pressure voltage Vset2, when second
The second comparison sub-module 422 that input voltage judgment module includes compares to obtain the second branch pressure voltage Vset2 more than second
It is controlled when predetermined reference voltage Vref2 to the second delay input terminal Din2 and exports the first level signal；Second input voltage
The second delay submodule 423 that judgment module includes is by the signal delay for the input terminal Din2 input that is delayed by described second
Two predetermined delay time T2, to obtain exporting to the second control enable signal of the second control Enable Pin EN2；The input is enabled
The current potential of current potential and the second control Enable Pin EN2 that control module 40 controls Enable Pin EN1 when described first is all first
The current potential that the input Enable Pin EN is controlled when level is the first level, indicates input voltage vin via in low-voltage at this time
It is upgraded to high voltage, if the current potential for powering on Enable Pin Enable at this time is also the first level, then can convert and control to the voltage
The control terminal of unit 102 processed sends voltage changeover control signal, so that the voltage conversion control unit 102 controls voltage
Converting unit 101 carries out voltage conversion to Vin, to export multiple and different display voltage.
Specifically, as shown in figure 5, on the basis of the specific embodiment of upper electric control unit as shown in Figure 4, described
One partial pressure submodule 411 may include the first divider resistance R1 and the second divider resistance R2；
The first end of the first divider resistance R1 is connect with the Input voltage terminal Vin-T, first divider resistance
The second end of R1 is connect with first branch pressure voltage end Vset1-T；
The first end of the second divider resistance R2 is connect with the second end of the first divider resistance R1, described second point
The second end of piezoresistance R2 is connect with the first low-voltage input terminal of the first low-voltage VSS1 of input；
First comparison sub-module 412 may include：First comparator DC1, normal phase input end are divided with described first
Voltage end Vset1-T connections, inverting input are connect with the first reference voltage terminal, output end and the first delay input terminal
Din1 connections；
First reference voltage terminal is for exporting the first predetermined reference voltage Vref1；
The second partial pressure submodule 421 may include third divider resistance R3 and the 4th divider resistance R4；
The first end of the third divider resistance R3 is connect with the Input voltage terminal Vin-T, the third divider resistance
The second end of R3 is connect with second branch pressure voltage end Vset2-T；
The first end of the 4th divider resistance R4 is connect with the second end of the third divider resistance R3, described 4th point
The second end of piezoresistance R4 is connect with the second low-voltage input terminal of the second low-voltage VSS2 of input；
Second comparison sub-module 422 may include：Second comparator DC2, normal phase input end are divided with described second
Voltage end Vset2-T connections, inverting input are connect with the second reference voltage terminal, output end and the second delay input terminal
Din2 connections；
Second reference voltage terminal is for exporting the second predetermined reference voltage Vref2；
The input makes the energy control module 40 may include：The enabled control of input and door ANDI, first input end with it is described
First control Enable Pin EN1 connections, the second input terminal are connect with the second control Enable Pin EN2, output end and the input
Enable Pin EN connections.
In practical operation, the value of VSS1 and VSS2 can be selected according to actual conditions, and VSS1 and VSS2 can be equal,
It can not also be equal.In the specific implementation, the first low-voltage input terminal and the second low-voltage input terminal can all be ground terminal, but not
As limit.
In practical operation, the resistance value of R1, the resistance value of R2, the resistance value of the resistance value of R3 and R4 can be according to reality
Situation is selected.
In the specific embodiment of upper electric control unit shown in Fig. 5, first level signal is high level signal, institute
It is low level signal to state second electrical level signal, and first level is high level, and the second electrical level is low level.
The specific embodiment of the present invention upper electric control unit as described in Figure 5 at work, in the upper of controlling power circuit
When electric sequential, it has been contemplated that the rise time of input voltage vin, T1 and T2 can be selected according to actual conditions, for example, T1 can
To be equal to 1ms, T2 can be equal to 2ms；Alternatively, T1 can be equal to 0.8ms, T2 can be equal to 1.8ms.
In practical operation, when the input voltage vin of system end input quickly reaches the stable state namely Vin of setting voltage
Rise time in short-term, after 2ms, if the current potential of Enable also be high level, can send out signal notice power circuit include
Voltage conversion control unit and voltage conversion unit proceed by voltage switching motion；
If the rise time of the input voltage vin of system end input is long namely Vin rises slowly, or even has step
Saltus step, then once each branch pressure voltage is not up to corresponding predetermined reference voltage, and the current potential of EN1 and the current potential of EN2 will not all become
High level, then the current potential of EN will not become high level, it is necessary to until system end input input voltage VIN reach detecting point voltage
(namely EN1 and EN2 are triggered), just can make the current potential of EN become high level, if the current potential of Enable is also high level,
Can send out the signal notice power circuit voltage conversion control unit that includes and voltage conversion unit to proceed by voltage conversion dynamic
Make.
The embodiment of the present invention utilizes AND gate, as long as the current potential of the current potential of EN and Enable are all high level, then
Can send out the signal notice power circuit voltage conversion control unit that includes and voltage conversion unit to proceed by voltage conversion dynamic
Make.
At work, the value of Vset1 can pass through the specific embodiment of the present invention upper electric control unit as described in Figure 5
R1 and R2 are adjusted, and the value of Vset2 can be adjusted by R3 and R4, and R1-R4 can be set to the interior of power circuit
Portion can also be set to the outside of power circuit；When R1-R4 is set to the inside of power circuit, extra circuits are needed
Module is controlled, and when R1-R4 is set to the outside of power circuit, the resistance value that can freely set the above resistance is come
To the branch pressure voltage with different voltages value.
Predetermined delay time is controlled by delay submodule, and can be selected as needed predetermined reference voltage, for example, can be with
It sets Vref1 and is equal to 4.9V, setting Vref2 is equal to 2.5V, the specific embodiment of the present invention upper electric control unit as shown in Figure 5
At work, as shown in fig. 6, the rise time of Vin is TR, T1 is the first predetermined delay time, when T2 is the second predetermined delay
Between, when the current potential of the current potential of EN1 and/or EN2 are low level, the current potential of EN is low level；When the current potential of EN1 and the electricity of EN2
When position is all high level, the current potential of EN is high level, if the current potential of Enable is high level at this time, then the voltage is notified to turn
It changes control unit 102 and controls voltage conversion unit 101 to Vin progress voltage conversions, to export multiple and different display electricity consumptions
Pressure.
Preferably, the first input voltage judgment module can also filter out submodule including the first spike；
First spike filters out submodule and is set to the output end of the first comparator and the first delay input
Between end, the signal for being used for the output end output to the first comparator carries out deglitch processing, and will be obtained after processing
To signal be sent to it is described first delay input terminal；
The second input voltage judgment module further includes that the second spike filters out submodule；
Second spike filters out submodule and is set to the output end of second comparator and the second delay input
Between end, the signal for being used for the output end output to second comparator carries out deglitch processing, and will be obtained after processing
To signal be sent to it is described second delay input terminal.
The preferred embodiment of upper electric control unit of the present invention is prolonged by the output end in first comparator with first
When input terminal between be arranged the first spike filtering submodule, the output end of the second comparator and second delay input terminal between set
The second spike filtering submodule is set, anti-spike is carried out with the signal that the signal exported to first comparator and the second comparator export
Pulse is handled.
In the specific implementation, the upper electric control subelement may include：
Upper electric control and door, first input end are connect with the Enable Pin that powers on, and the second input terminal and the input are enabled
End connection, output end are connect with the control terminal of the voltage conversion control unit；
When the current potential for powering on Enable Pin and the current potential for inputting Enable Pin are all high level, upper electric control turns with door to voltage
The control terminal output high level of control unit is changed, so that voltage conversion control unit control voltage conversion unit carries out voltage and turns
Move work；
When the current potential that powers on Enable Pin and/or the current potential for inputting Enable Pin are low level, upper electric control and door are to voltage
The control terminal of TCU transfer control unit exports low level.Voltage conversion control unit and voltage conversion unit are failure to actuate.
Electrification control method described in the embodiment of the present invention is applied to above-mentioned upper electric control unit, the upper electric control
Method includes：
Input voltage judgment sub-unit detects the input voltage inputted by Input voltage terminal, and works as and determine the input voltage
Start timing when more than predetermined voltage, is controlled after the predetermined time to input Enable Pin and export the first level；
When the current potential that powers on Enable Pin and the current potential of the input Enable Pin simultaneously for the first level when, upper electric control is singly
The control terminal that member controls the voltage conversion control unit for including to power circuit sends voltage changeover control signal.
Electrification control method described in the embodiment of the present invention enables to rise to high voltage by low-voltage in input voltage
Voltage conversion unit pair is just controlled by voltage conversion control unit after (namely input voltage reaches the stable state of setting voltage)
Input voltage carries out voltage conversion and obtains multiple and different display voltage, to avoid power supply electricity existing in the prior art
Road carry out power supply conversion when input voltage does not rise complete and caused by the display that exports voltage inaccuracy, so as to cause
The problem of corresponding display panel malfunction.
Power circuit described in the embodiment of the present invention, including voltage conversion control unit further include above-mentioned upper electric control
Unit；The upper electric control subelement that the upper electric control unit includes is connect with the control terminal of the voltage conversion control unit.
In practical operation, as shown in fig. 7, the voltage conversion control unit may include sequence controller SC；
The voltage conversion unit may include low pressure difference linear voltage regulator (Low Dropout Voltage
Regulator, LDO circuit) 70, boost converter (Boost Converter) 71, buck converter (Buck Converter)
72, I2C interface 73, overheating protection module TS and under-voltage locking module UVLO；
The low pressure difference linear voltage regulator is for exporting various logic IC's (Integrated Circuit, integrated circuit)
Operating voltage；The I2C interface 73 is connect with data line SDA and clock cable SCL；
The upper electric control unit includes input voltage judgment sub-unit 11 and upper electric control and door ANDC；
In the figure 7, it is power circuit marked as Power-IC.
Display device described in the embodiment of the present invention includes above-mentioned power circuit.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of upper electric control unit, is applied to power circuit, the power circuit includes voltage conversion unit and voltage conversion
Control unit；The voltage conversion unit is connect with Input voltage terminal；It is characterized in that, the upper electric control unit includes：
Input voltage judgment sub-unit is connect with the Input voltage terminal and input Enable Pin, for detecting by input electricity
The input voltage of pressure side input, and start timing when determining the input voltage more than predetermined voltage, after the predetermined time
It controls to the input Enable Pin and exports the first level；And
Upper electric control subelement, and the control terminal of voltage conversion control unit, the input Enable Pin and powers on Enable Pin and connect,
For when the current potential for powering on Enable Pin and the current potential of the input Enable Pin while to be controlled to the electricity when the first level
The control terminal of TCU transfer control unit is pressed to send voltage changeover control signal.
2. upper electric control unit as described in claim 1, which is characterized in that the input voltage judgment sub-unit includes partial pressure
Module, comparison module and time delay module；
The division module is connect with the Input voltage terminal and branch pressure voltage end, for being divided to the input voltage,
To obtain branch pressure voltage, and the branch pressure voltage is exported by the branch pressure voltage end；
The comparison module is connect with the branch pressure voltage end and delay input terminal, for the branch pressure voltage and predetermined base
Quasi- voltage, and will compare when the branch pressure voltage is less than or equal to the predetermined reference voltage and control to the delay input terminal
Second electrical level signal is exported, controls when comparing the branch pressure voltage more than the predetermined reference voltage and is inputted to the delay
The first level signal of end output；
The time delay module is connect with the delay input terminal with the input Enable Pin, and being used for will be defeated by the delay input terminal
The predetermined delay time of signal delay entered, to obtain input enable signal, and passes through the input Enable Pin and exports the input
Enable signal.
3. upper electric control unit as claimed in claim 2, which is characterized in that the division module include the first divider resistance and
Second divider resistance；
The first end of first divider resistance is connect with the Input voltage terminal, the second end of first divider resistance and institute
State the connection of branch pressure voltage end；
The first end of second divider resistance is connect with the second end of first divider resistance, second divider resistance
Second end is connect with low-voltage input terminal；
The comparison module includes：Comparator, normal phase input end are connect with the branch pressure voltage end, inverting input and benchmark electricity
Press bond, output end are connect with the delay input terminal；
The reference voltage terminal is for exporting the predetermined reference voltage.
4. upper electric control unit as described in claim 1, which is characterized in that the input voltage judgment sub-unit includes first
Input voltage judgment module, the second input voltage judgment module and input make energy control module；
The first input voltage judgment module includes the first partial pressure submodule, the first comparison sub-module and the first delay submodule
Block；
The second input voltage judgment module includes the second partial pressure submodule, the second comparison sub-module and the second delay submodule
Block；
The first partial pressure submodule is connect with the Input voltage terminal and the first branch pressure voltage end, for the input voltage
It is divided, to obtain the first branch pressure voltage, and first branch pressure voltage is exported by first branch pressure voltage end；
First comparison sub-module and first branch pressure voltage end and the first delay input terminal connects, are used for more described the
One branch pressure voltage and the first predetermined reference voltage, and first branch pressure voltage will be compared and made a reservation for less than or equal to described first
It is controlled when reference voltage to the first delay input terminal and exports second electrical level signal, first branch pressure voltage is big when comparing
It is controlled when first predetermined reference voltage to the first delay input terminal and exports the first level signal；
The first delay submodule controls Enable Pin with first and connect with described first input terminal that is delayed, and being used for will be by described the
Signal the first predetermined delay time of delay of one delay input terminal input, to obtain the first control enable signal, and by described
First control Enable Pin output the first control enable signal；
The second partial pressure submodule is connect with the Input voltage terminal and the second branch pressure voltage end, for the input voltage
It is divided, to obtain the second branch pressure voltage, and second branch pressure voltage is exported by second branch pressure voltage end；
Second comparison sub-module and second branch pressure voltage end and the second delay input terminal connects, are used for more described the
Two branch pressure voltages and the second predetermined reference voltage, and second branch pressure voltage will be compared and made a reservation for less than or equal to described second
It is controlled when reference voltage to the second delay input terminal and exports second electrical level signal, second branch pressure voltage is big when comparing
It is controlled when second predetermined reference voltage to the second delay input terminal and exports the first level signal；
The second delay submodule controls Enable Pin with second and connect with described second input terminal that is delayed, and being used for will be by described the
Signal the second predetermined delay time of delay of two delay input terminal inputs, to obtain the second control enable signal, and by described
Second control Enable Pin output the second control enable signal；
The input keeps energy control module and the first control Enable Pin, the second control Enable Pin and the input enabled
End connection, for when the current potential of the current potential of the first control Enable Pin and the second control Enable Pin is all the first level
The current potential for controlling the input Enable Pin is the first level, the current potential when the first control Enable Pin and/or second control
The current potential of Enable Pin processed controls input Enable Pin current potential when being second electrical level is second electrical level.
5. upper electric control unit as claimed in claim 4, which is characterized in that the first partial pressure submodule includes the first partial pressure
Resistance and the second divider resistance；
The first end of first divider resistance is connect with the Input voltage terminal, the second end of first divider resistance and institute
State the connection of the first branch pressure voltage end；
The first end of second divider resistance is connect with the second end of first divider resistance, second divider resistance
Second end is connect with the first low-voltage input terminal；
First comparison sub-module includes：First comparator, normal phase input end are connect with first branch pressure voltage end, reverse phase
Input terminal is connect with the first reference voltage terminal, and output end is connect with the first delay input terminal；
First reference voltage terminal is for exporting first predetermined reference voltage；
The second partial pressure submodule includes third divider resistance and the 4th divider resistance；
The first end of the third divider resistance is connect with the Input voltage terminal, the second end of the third divider resistance and institute
State the connection of the second branch pressure voltage end；
The first end of 4th divider resistance is connect with the second end of the third divider resistance, the 4th divider resistance
Second end is connect with the second low-voltage input terminal；
Second comparison sub-module includes：Second comparator, normal phase input end are connect with second branch pressure voltage end, reverse phase
Input terminal is connect with the second reference voltage terminal, and output end is connect with the second delay input terminal；
Second reference voltage terminal is for exporting second predetermined reference voltage；
The input makes the energy control module include：The enabled control of input and door, first input end control Enable Pin with described first
Connection, the second input terminal are connect with the second control Enable Pin, and output end is connect with the input Enable Pin.
6. upper electric control unit as claimed in claim 5, which is characterized in that the first input voltage judgment module further includes
First spike filters out submodule；
First spike filter out submodule be set to the output end of the first comparator with described first be delayed input terminal it
Between, for the signal to the output of the output end of the first comparator carry out deglitch processing, and will be obtained after processing
Signal is sent to the first delay input terminal；
The second input voltage judgment module further includes that the second spike filters out submodule；
Second spike filter out submodule be set to the output end of second comparator with described second be delayed input terminal it
Between, for the signal to the output of the output end of second comparator carry out deglitch processing, and will be obtained after processing
Signal is sent to the second delay input terminal.
7. the upper electric control unit as described in any claim in claim 1 to 6, which is characterized in that the upper electric control
Subelement includes：
Upper electric control and door, first input end are connect with the Enable Pin that powers on, and the second input terminal connects with the input Enable Pin
It connects, output end is connect with the control terminal of the voltage conversion control unit.
8. a kind of electrification control method is applied to the upper electric control unit as described in any claim in claim 1 to 7,
It is characterized in that, the electrification control method includes：
Input voltage judgment sub-unit detects the input voltage inputted by Input voltage terminal, and is more than when determining the input voltage
Start timing when predetermined voltage, is controlled after the predetermined time to input Enable Pin and export the first level；
When the current potential of the current potential that powers on Enable Pin and the input Enable Pin is simultaneously the first level, upper electric control subelement control
The control terminal for making the voltage conversion control unit for including to power circuit sends voltage changeover control signal.
9. a kind of power circuit, including voltage conversion control unit, which is characterized in that further include as any in claim 1 to 7
Upper electric control unit described in claim；The upper electric control subelement that the upper electric control unit includes is converted with the voltage
The control terminal of control unit connects.
10. a kind of display device, which is characterized in that including power circuit as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810320205.6A CN108469869B (en) | 2018-04-11 | 2018-04-11 | Power-on control unit, power-on control method, power supply circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810320205.6A CN108469869B (en) | 2018-04-11 | 2018-04-11 | Power-on control unit, power-on control method, power supply circuit and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108469869A true CN108469869A (en) | 2018-08-31 |
| CN108469869B CN108469869B (en) | 2020-07-24 |
Family
ID=63263131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810320205.6A Active CN108469869B (en) | 2018-04-11 | 2018-04-11 | Power-on control unit, power-on control method, power supply circuit and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108469869B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445090A (en) * | 2019-09-10 | 2019-11-12 | 上海商米科技集团股份有限公司 | POS terminal cash box and its protection circuit |
| CN114023280A (en) * | 2021-11-18 | 2022-02-08 | 深圳市华星光电半导体显示技术有限公司 | Voltage control circuit and display panel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100278329A1 (en) * | 2009-04-29 | 2010-11-04 | Ambit Microsystems (Shanghai) Ltd. | Port detection and protection circuit and electronic device using the same |
| CN102882203A (en) * | 2011-07-14 | 2013-01-16 | 冠捷投资有限公司 | Power transmission system, device and protection circuit with power supply protection function |
| CN102931826A (en) * | 2012-10-23 | 2013-02-13 | 京东方科技集团股份有限公司 | Time-delay power supply circuit, power supply time delay method and boost system |
| CN103326567A (en) * | 2013-07-17 | 2013-09-25 | 合肥工业大学 | Switching converter delay control method and implementation device |
-
2018
- 2018-04-11 CN CN201810320205.6A patent/CN108469869B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100278329A1 (en) * | 2009-04-29 | 2010-11-04 | Ambit Microsystems (Shanghai) Ltd. | Port detection and protection circuit and electronic device using the same |
| CN102882203A (en) * | 2011-07-14 | 2013-01-16 | 冠捷投资有限公司 | Power transmission system, device and protection circuit with power supply protection function |
| CN102931826A (en) * | 2012-10-23 | 2013-02-13 | 京东方科技集团股份有限公司 | Time-delay power supply circuit, power supply time delay method and boost system |
| CN103326567A (en) * | 2013-07-17 | 2013-09-25 | 合肥工业大学 | Switching converter delay control method and implementation device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445090A (en) * | 2019-09-10 | 2019-11-12 | 上海商米科技集团股份有限公司 | POS terminal cash box and its protection circuit |
| CN114023280A (en) * | 2021-11-18 | 2022-02-08 | 深圳市华星光电半导体显示技术有限公司 | Voltage control circuit and display panel |
| WO2023087381A1 (en) * | 2021-11-18 | 2023-05-25 | 深圳市华星光电半导体显示技术有限公司 | Voltage control circuit and display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108469869B (en) | 2020-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202818097U (en) | Power supply apparatus and electronic device with the power supply apparatus | |
| CN101924468B (en) | Way out of balance (WOB) current correction for use with a multi-phase DC-DC converter | |
| CN102290978B (en) | Power management system | |
| US20170005499A1 (en) | Battery charging apparatus and battery charging protection control method | |
| CN100424974C (en) | Power circuit and method of rising output voltage of power circuit | |
| CN107209539A (en) | Electric supply installation and its control circuit, current-collecting device and its control circuit, electronic equipment and charging adapter, method for detecting abnormality using it | |
| US20100284206A1 (en) | Power adapter and power supply method thereof | |
| US7777455B1 (en) | Switching battery charger with programmable current control and power control | |
| CN108123519A (en) | Power supply transfer equipment and its control method, device and electric power system | |
| CN109412221A (en) | charging system and power adapter thereof | |
| CN101499656B (en) | Power supply circuit having resistance element changing its resistance value | |
| CN111343065B (en) | Communication electric appliance and air conditioner | |
| CN104169834A (en) | Method and apparatus for load switch controller with tracking to support DDR termination | |
| CN108469869A (en) | Upper electric control unit, method, power circuit and display device | |
| EP3205024B1 (en) | Integrated circuit with external resistance detection | |
| CN210652756U (en) | Electric automobile BMS's controlling means and electric automobile | |
| CN114421581B (en) | Control circuit, method and device for backup battery unit and storage system | |
| CN104038207A (en) | Switchover circuit and electronic device | |
| CN103383547B (en) | The power management logic unit of many logical blocks power management integrated circuit | |
| CN112583255B (en) | Power supply device of electronic equipment and electronic equipment | |
| CN205596017U (en) | Four ways output adjustable power management system by I2C control | |
| CN103378726A (en) | Switching power supply and control circuit and control method thereof | |
| CN104682679B (en) | Power supply changeover device and its slope detecting controller and method | |
| CN109787349B (en) | UPS circuit, power supply circuit and electronic equipment | |
| CN104617764B (en) | Powering order control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |