CN207241434U - Display instrument and automobile for automobile - Google Patents
Display instrument and automobile for automobile Download PDFInfo
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- CN207241434U CN207241434U CN201721082146.0U CN201721082146U CN207241434U CN 207241434 U CN207241434 U CN 207241434U CN 201721082146 U CN201721082146 U CN 201721082146U CN 207241434 U CN207241434 U CN 207241434U
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Abstract
The utility model provides a kind of display instrument and automobile for automobile, wherein, display instrument includes power module, processor and backlight drive circuit；Power module includes immunity module, step-up DC/DC module and voltage-dropping type DCDC modules；The input terminal connection external power supply of immunity module, the input terminal with step-up DC/DC module, the input terminal of voltage-dropping type DCDC modules are connected the output terminal of immunity module respectively, first output terminal of voltage-dropping type DCDC modules and the power input of processor connect, and the output terminal of step-up DC/DC module and the power input of backlight drive circuit connect.The utility model can improve the stability of display instrument.
Description
Technical field
The utility model belongs to the display instrument and automobile of electronic technology field, more particularly, to automobile.
Background technology
The alternating current generator of automobile is used to provide electric energy for the associated components such as display instrument of automobile.When the exchange of automobile is sent out
Motor sudden shuts off and loads or during the connecting path of storage battery, can bring interference signal to the display instrument of automobile, such as have
There is certain destructive transient overvoltage signal, this transient overvoltage signal can influence the steady of display instrument to a certain extent
Qualitative, this requires display instrument possesses antijamming capability.And it is its important module such as CPU that current display instrument, which is,
(Central Processing Unit, central processing unit) or SDRAM (Synchronous Dynamic Random Access
Memory, synchronous DRAM) anti-jamming circuit is provided, and the protection of other modules is have ignored, this is possible to meeting
The situation that other modules are damaged because being subject to destructive voltge surge is caused to occur.
Utility model content
Asked to solve the technology of the situation that other modules are damaged because being subject to destructive voltge surge in display instrument
Topic, the utility model embodiment provide the display instrument and automobile for automobile.
The utility model embodiment first aspect provides a kind of display instrument for automobile, including power module, processing
Device and backlight drive circuit；The power module includes immunity module, step-up DC/DC module and voltage-dropping type DCDC modules；
The input terminal connection external power supply of the immunity module, the output terminal of the immunity module respectively with the liter
The input terminal connection of the input terminal of die mould DCDC modules, the voltage-dropping type DCDC modules, the first of the voltage-dropping type DCDC modules
Output terminal is connected with the power input of the processor, output terminal and the backlight drive of the step-up DC/DC module
The power input connection of circuit；
The immunity module receives the first power supply signal of external power supply, and filters out dry in first power supply signal
Signal is disturbed, exports second source signal；
The voltage-dropping type DCDC modules handle the second source signal by decompression, output the 3rd DC power supply letter
Number, the 3rd DC power signal is powered for the processor；
The step-up DC/DC module handles the second source signal by boosting, output the 4th DC power supply letter
Number, the 4th DC power signal is powered for the backlight drive circuit.
Preferably, the immunity module includes high-frequency filter circuit, common mode filtering circuit, Schottky diode and π types
Filter circuit；
The input terminal of the high-frequency filter circuit is connected with external power supply, the output terminal and common mode of the high-frequency filter circuit
The input terminal connection of filter circuit, the anode metal end company of the institute input terminal of this common mode filtering circuit and the Schottky diode
Connect, the N-type substrate end of the Schottky diode is connected with the input terminal of the π types filter circuit；The π types filter circuit
The input terminal with the step-up DC/DC module, the input terminal of the voltage-dropping type DCDC modules are connected output terminal respectively；
The high-frequency filter circuit receives the first power supply signal of external power supply, and filters out in first power supply signal
High-frequency interferencing signal, exports the 5th DC power signal；
The common mode filtering circuit receives the 5th DC power signal, and filters out in the 5th DC power signal
Common mode interference signal, export the 6th DC power signal；
The π types filter circuit receives the 6th DC power signal by the Schottky diode, and filters out
Middle low-frequency interference signal in 6th DC power signal, exports the second source signal.
Preferably, the high-frequency filter circuit includes the first capacitance and the second capacitance；
The output terminal of the input terminal of the high-frequency filter circuit and the high-frequency filter circuit is first capacitance
First end, the second end of first capacitance connect the first end of the second capacitance, the second end connection ground terminal of second capacitance.
Preferably, the π types filter circuit includes inductance, the 3rd capacitance, the 4th capacitance and the first electrolytic capacitor；
The first end of the inductance N-type substrate end with the Schottky diode, the first of the 3rd capacitance respectively
End connection；The input with the first end, the step-up DC/DC module of the 4th capacitance respectively of the second end of the inductance
End, the input end module connection of the voltage-dropping type DCDC modules；
The first end of first electrolytic capacitor is connected with the second end of the first end of the inductance or the inductance；
The second end of the second end of 3rd capacitance, the second end of the 4th capacitance and first electrolytic capacitor connects
Ground terminal.
Preferably, the π types filter circuit includes inductance, magnetic bead, the 3rd capacitance and the 4th capacitance；
The first end of the magnetic bead is connected with the N-type substrate end of the Schottky diode, the second end of the magnetic bead with
The first end connection of the inductance, the second end of the inductance are connected with the input terminal of the power module；The of the magnetic bead
The second end of one end or the magnetic bead is connected with the first end of the 3rd capacitance, first end and the electricity of the 4th capacitance
The second end connection of sense；Or
The N-type substrate end of the Schottky diode is connected with the first end of the inductance, the second end of the inductance with
The first end connection of the magnetic bead, the second end of the magnetic bead are connected with the input terminal of the power module；3rd capacitance
First end be connected with the first end of the inductance, the second end of the first end of the magnetic bead or the magnetic bead with the described 4th electricity
The first end connection of appearance；
The second end of 3rd capacitance and the second end of the 4th capacitance are all connected with ground terminal.
Preferably, the immunity module further includes first resistor and second resistance；
The first end of the first resistor is connected with the output terminal of the high-frequency filter circuit, and the second of the first resistor
Terminate ground terminal；
The first end of the second resistance is connected with the output terminal of the π types filter circuit, and the second of the second resistance
Terminate ground terminal.
Preferably, the display instrument further includes comparator；
The input terminal of the comparator is connected with the output terminal of the immunity module, the output terminal of the comparator and institute
State the first control signal connection of processor, the first control output end of the processor and the step-up DC/DC module
Enable Pin connects, and the second control output end of the processor is connected with the Enable Pin of the voltage-dropping type DCDC modules；
The comparator by the output voltage of the immunity module compared with reference voltage, output and comparative result
Corresponding level signal, the processor control the step-up DC/DC module or the voltage-dropping type according to the level signal
DCDC modules whether out-put supply signal.
Preferably, the display instrument further includes operational amplifier and sampling resistor；
The sampling resistor is connected on the power input of the backlight drive circuit and the step-up DC/DC module
Between output terminal, the first input end of the operational amplifier is connected with the first end of the sampling resistor, the operation amplifier
Second input terminal of device is connected with the second end of the sampling resistor；
The output terminal of the operational amplifier is connected with the second control signal of the processor, and the of the processor
Two control output ends connect the Enable Pin of the step-up DC/DC module；
The operational amplifier gathers the voltage difference at the sampling resistor both ends, exports amplification corresponding with the voltage difference
Whether value, the processor control the step-up DC/DC module defeated according to the value of magnification and the comparative result of predetermined threshold value
Go out power supply signal.
Preferably, the display instrument further includes USB module, SDRAM memory, WIFI module and built-in multimedia and deposits
Reservoir；The power module further includes the first linear voltage-stabilizing circuit；
The voltage-dropping type DCDC modules further include the second output terminal, the 3rd output terminal and the 4th output terminal, and described second is defeated
Outlet is connected with the power input of the USB module, the power input of the 3rd output terminal and the SDRAM memory
End connection, the 4th output terminal are connected with the power input of the WIFI module；
The input terminal of first linear voltage-stabilizing circuit is connected with the 4th output terminal, first linear voltage-stabilizing circuit
Output terminal be connected with the power input of the built-in multimedia memory；
The voltage-dropping type DCDC modules handle the second source signal by multiple decompression, export the 7th direct current respectively
Power supply signal, the 8th DC power signal and the 9th DC power signal, the 7th DC power signal are the USB module
Power supply, the 8th DC power signal are powered for the SDRAM memory, and the 9th DC power signal is the WIFI
Module for power supply；
9th DC power signal is carried out linear voltage stabilization processing by first linear voltage-stabilizing circuit, and output the tenth is straight
Galvanic electricity source signal, the tenth DC power signal are powered for the built-in multimedia memory.
The utility model embodiment second aspect provides a kind of automobile, including is used for the aobvious of automobile described in any of the above-described
Show instrument.
Existing beneficial effect is the utility model embodiment compared with prior art：The utility model embodiment by
Immunity module is added in the power module of display instrument, is all carried out so as to the modules to display instrument anti-interference anti-
Shield, improves the stability of display instrument.
Brief description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the utility model
Example is applied, for those of ordinary skill in the art, without having to pay creative labor, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the first structure schematic diagram for the power module that the utility model embodiment provides；
Fig. 2 is the structure diagram for the immunity module that the utility model embodiment provides；
Fig. 3 is the second structure diagram of the power module that the utility model embodiment provides；
Fig. 4 is the 3rd structure diagram of the power module that the utility model embodiment provides.
Embodiment
In being described below, in order to illustrate rather than in order to limit, it is proposed that such as tool of particular system structure, technology etc
Body details, to understand thoroughly the utility model embodiment.However, it will be clear to one skilled in the art that there is no these
The utility model can also be realized in the other embodiments of detail.In other situations, omit to well-known system,
The detailed description of device, circuit and method, in case unnecessary details hinders the description of the utility model.
In order to illustrate technical solution described in the utility model, illustrated below by specific embodiment.
As shown in Figure 1, the display instrument for automobile includes power module 100, processor 200 and backlight drive circuit
300.Power module 100 include immunity module 110, step-up DC/DC (Direct Current-Direct Current, directly
Galvanic electricity source is transformed to DC power supply) module 120 and voltage-dropping type DCDC modules 130.
The input terminal connection external power supply of immunity module 110, the output terminal of immunity module 110 respectively with booster type
The input terminal of DCDC modules 120, the input terminal connection of voltage-dropping type DCDC modules 130, the first output of voltage-dropping type DCDC modules 130
End is connected with the power input of processor 200, the output terminal of step-up DC/DC module 120 and the electricity of backlight drive circuit 300
Source input terminal connection.Wherein, external power supply is the power supply for being used to provide DC power signal for display instrument in automobile.Backlight is driven
Dynamic circuit 300 is the circuit for driving backlight module.Backlight module is used to provide back light for the screen of display instrument.
Wherein, the tool of processor 200 is central processing unit 200.
Immunity module 110 receives the first power supply signal of external power supply, and filters out the letter of the interference in the first power supply signal
Number, export second source signal；Voltage-dropping type DCDC modules 130 handle second source signal by decompression, export the 3rd direct current
Power supply signal, the 3rd DC power signal are powered for processor 200.Step-up DC/DC module 120 passes through second source signal
Boosting is handled, and exports the 4th DC power signal, and the 4th DC power signal is powered for backlight drive circuit 300.
The utility model embodiment by the power module 100 of display instrument add immunity module 110, so as to
Anti-interference protection is all carried out with the modules to display instrument, improves the stability of display instrument.
Preferably, as shown in Fig. 2, immunity module 110 includes high-frequency filter circuit 111, common mode filtering circuit 112, Xiao
Special based diode D1 and π types filter circuit 113.
Wherein, the input terminal of high-frequency filter circuit 111 is connected with external power supply, the output terminal of high-frequency filter circuit 111 with
Common mode filtering circuit 112 input terminal connection, institute this common mode filtering circuit 112 input terminal and Schottky diode D1 anode
Metal end connects, and the N-type substrate end of Schottky diode D1 is connected with the input terminal of π types filter circuit 113；π type filter circuits
113 output terminal (i.e. VCC ends) input terminal with step-up DC/DC module 120, the input terminal of voltage-dropping type DCDC modules 130 respectively
Connection.Common mode filtering circuit 112 is specifically as follows common mode inductance, first input end and the immunity module 110 of common mode inductance
Output terminal connects, the second input end grounding of common mode inductance, the first output terminal of common mode inductance and the sun of Schottky diode D1
Pole metal end connection, the second output head grounding of common mode inductance.Schottky diode D1 can prevent external power supply positive and negative anodes from connecing
Inverse time, electric current poured in down a chimney into power module 100, so as to damage the component in display instrument.
High-frequency filter circuit 111 receives the first power supply signal of external power supply, and filters out the high frequency in the first power supply signal
Interference signal, exports the 5th DC power signal；Common mode filtering circuit 112 receives the 5th DC power signal, and filters out the 5th
Common mode interference signal in DC power signal, exports the 6th DC power signal；π types filter circuit 113, which receives, passes through Xiao Te
The 6th DC power signal of based diode D1, and filter out the middle low-frequency interference signal in the 6th DC power signal, output the
Two power supply signals.
Specifically, common mode filtering circuit 112 is common mode inductance, first input end and the immunity module 110 of common mode inductance
Output terminal connection, the second input end grounding of common mode inductance, the first output terminal of common mode inductance is with Schottky diode D1's
Anode metal end connects, the second output head grounding of common mode inductance.
Specifically, high-frequency filter circuit 111 includes the first capacitance C1 and the second capacitance C2.High-frequency filter circuit 111 it is defeated
The output terminal for entering end and high-frequency filter circuit 111 is the first end of the first capacitance C1, the second end connection of the first capacitance C1 the
The first end of two capacitance C2, the second end connection ground terminal of the second capacitance C2.The the first capacitance C1 and the second capacitance C2 of series connection can be with
To there is the peak voltage quickly low drawing of amplitude low energy in first power supply signal.
Specifically, as the first embodiment, π types filter circuit 113 includes inductance L, the 3rd capacitance C3, the 4th electricity
Hold C4 and the first electrolytic capacitor C5.
Wherein, the first end of the inductance L N-type substrate end with Schottky diode D1, the first end of the 3rd capacitance C3 respectively
Connection；Input terminal, the voltage-dropping type of the second end of inductance the L first end with the 4th capacitance C4, step-up DC/DC module 120 respectively
The input end module connection of DCDC modules 130；The of the first end of first electrolytic capacitor C5 and the first end of inductance L or inductance L
Two ends connect；The second end of 3rd capacitance C3, the second end of the 4th capacitance C4 connect ground with the second end of the first electrolytic capacitor C5
End.
First electrolytic capacitor C5 and inductance L can carry out energy storage when the input voltage (i.e. Vin) of external power supply is higher,
And can be when the input voltage of external power supply be relatively low, for load (including voltage-dropping type DCDC modules 130 and step-up DC/DC
Module 120) electric energy is provided, in this way, the stability to the input voltage of load can be improved.In addition, π types filter circuit 113
The second electrolytic capacitor C6 is further included, the first end of the second electrolytic capacitor C6 connects with the first end of inductance L or the second end of inductance L
Connect, the second end connection ground terminal of the second electrolytic capacitor C6.
Specifically, inductance L, magnetic bead FB1, the 3rd capacitance C3 are included as second of embodiment, π types filter circuit 113
With the 4th capacitance C4.Wherein, external high frequency noise signal can be changed into thermal energy by magnetic bead FB1.
Wherein, the first end of magnetic bead FB1 is connected with the N-type substrate end of Schottky diode D1, the second end of magnetic bead FB1
It is connected with the first end of inductance L, the second end of inductance L is connected with the input terminal of power module 100；The first end of magnetic bead FB1 or
The second end of magnetic bead FB1 is connected with the first end of the 3rd capacitance C3, and the first end of the 4th capacitance C4 connects with the second end of inductance L
Connect；The second end of 3rd capacitance C3 and the second end of the 4th capacitance C4 are all connected with ground terminal.
Specifically, inductance L, magnetic bead FB1, the 3rd capacitance C3 are included as the third embodiment, π types filter circuit 113
With the 4th capacitance C4.The N-type substrate end of Schottky diode D1 is connected with the first end of inductance L, the second end and magnetic bead of inductance L
The first end connection of FB1, the second end of magnetic bead FB1 are connected with the input terminal of power module 100；The first end of 3rd capacitance C3 with
The first end connection of inductance L, the first end of magnetic bead FB1 or the second end of magnetic bead FB1 are connected with the first end of the 4th capacitance C4；
The second end of 3rd capacitance C3 and the second end of the 4th capacitance C4 are all connected with ground terminal.
In addition, π types filter circuit 113 further includes the first end and inductance L of the first electrolytic capacitor C5, the first electrolytic capacitor C5
First end or inductance L second end connection, the first electrolytic capacitor C5 second end connection ground terminal.
It is worth noting that, in order to preferably realize filtering, the first capacitance C1, the second capacitance C2, the 3rd capacitance C3 and
Four capacitance C4 all can be ceramic condenser.In addition, π types filter circuit 113 can also include a number of other capacitances (referring in Fig. 2
The 5th capacitance C7, the 6th capacitance C8, the 7th capacitance C9).One end ground connection of other capacitances, the other end and the first of magnetic bead FB1
The second end connection at end, the second end of magnetic bead FB1, the first end of inductance L or inductance L.
Specifically, immunity module 110 further includes first resistor R1 and second resistance R2；The first end of first resistor R1
It is connected with the output terminal of high-frequency filter circuit 111, the second end ground terminal of first resistor R1；The first end and π of second resistance R2
The output terminal connection of type filter circuit 113, the second end ground terminal of second resistance R2.First resistor R1 and second resistance R2 can be with
In the quick power down of the input voltage of external power supply, discharge as early as possible immunity module 110.
Specifically, as shown in figure 3, display instrument further includes operational amplifier 500 and sampling resistor 400.
Wherein, sampling resistor 400 is connected on the power input and step-up DC/DC module 120 of backlight drive circuit 300
Output terminal between, the first input end of operational amplifier 500 is connected with the first end of sampling resistor 400, operational amplifier 500
The second input terminal be connected with the second end of sampling resistor 400；The output terminal of operational amplifier 500 and the second of processor 200
Control signal connects, the Enable Pin of the second control output end connection step-up DC/DC module 120 of processor 200.In addition, adopt
Sample resistance 400 can also be connected in the major loop of backlight drive circuit 300.
Operational amplifier 500 gathers the voltage difference at 400 both ends of sampling resistor, exports value of magnification corresponding with voltage difference, place
Device 200 is managed according to value of magnification and the comparative result of predetermined threshold value, control step-up DC/DC module 120 whether out-put supply is believed
Number.When value of magnification is more than predetermined threshold value, processor 200 controls step-up DC/DC module 120 to stop out-put supply signal.This
Sample, can carry out overcurrent protection to backlight drive circuit 300 and backlight module.
Specifically, display instrument further includes comparator 600.The input terminal of comparator 600 is defeated with immunity module 110
Outlet connects, and the output terminal of comparator 600 is connected with the first control signal of processor 200, the first control of processor 200
Output terminal is connected with the Enable Pin of step-up DC/DC module 120, the second control output end and the voltage-dropping type DCDC of processor 200
The Enable Pin connection of module 130.In addition, display instrument further includes the band-gap reference for providing reference voltage for comparator 600
Circuit, band-gap reference circuit are connected with the reference voltage input Vref of comparator 600.
Comparator 600 compared with reference voltage, exports the output voltage of immunity module 110 and comparative result pair
The level signal answered, processor 200 is according to level signal, control step-up DC/DC module 120 or voltage-dropping type DCDC modules 130
Whether out-put supply signal.When output voltage and the absolute value of the difference of reference voltage are more than preset value, processor 200 can be with
Enable signal is sent to step-up DC/DC module 120 and voltage-dropping type DCDC modules 130, the two is stopped.In this way, just
Overvoltage/undervoltage can be carried out to modules in display instrument (such as power module 100, processor 200, backlight drive circuit 300)
Protection.
Specifically, display instrument further includes USB module, SDRAM memory, WIFI module and built-in multimedia storage
Device.Preferably, power module 100 further includes the first linear voltage-stabilizing circuit 140.Wherein, built-in multimedia memory is specially
A kind of memory of the embedded memory standard with controller, its operating voltage is generally 1.8 volts or 3.3 volts, for depositing
Store up operating system and application program of display instrument etc..
Voltage-dropping type DCDC modules 130 further include the second output terminal, the 3rd output terminal and the 4th output terminal, the second output terminal with
The power input connection of USB module, the power input of the 3rd output terminal and SDRAM memory connect, the 4th output terminal with
The power input connection of WIFI module.The input terminal of first linear voltage-stabilizing circuit 140 is connected with the 4th output terminal, First Line
The output terminal of property regulator circuit 140 is connected with the power input of built-in multimedia memory.
Further, as shown in figure 4, voltage-dropping type DCDC modules 130 include the first voltage-dropping type DCDC circuits 131, second
Voltage-dropping type DCDC circuits 132, the 3rd voltage-dropping type DCDC circuits 133 and the 4th voltage-dropping type DCDC circuits 134.Wherein, anti-interference mould
The input of the output terminal of block 110 input terminal with the first voltage-dropping type DCDC circuits 131, the second voltage-dropping type DCDC circuits 132 respectively
End connection；The output terminal of first voltage-dropping type DCDC circuits 131 input terminal with the 3rd voltage-dropping type DCDC circuits 133, the 4th respectively
The input terminal connection of voltage-dropping type DCDC circuits 134.Wherein, the first voltage-dropping type DCDC circuits 131 are the second output terminal；Second decompression
The output terminal of type DCDC circuits 132 is the 4th output terminal；The output terminal of 3rd voltage-dropping type DCDC circuits 133 is the 3rd output terminal,
The output terminal of 4th voltage-dropping type DCDC circuits 134 is the first output terminal.Specifically, the first control output end of processor 200 point
Enable Pin, the Enable Pin of the second voltage-dropping type DCDC circuits 132 not with the first voltage-dropping type DCDC circuits 131, the 3rd voltage-dropping type
The Enable Pin of DCDC circuits 133, the connection of the Enable Pin of the 4th voltage-dropping type DCDC circuits 134.
Voltage-dropping type DCDC modules 130 handle second source signal by multiple decompression, export the 7th DC power supply respectively
Signal, the 8th DC power signal and the 9th DC power signal, the 7th DC power signal are powered for USB module, and the 8th is straight
Galvanic electricity source signal is powered for SDRAM memory, and the 9th DC power signal is powered for WIFI module；First linear voltage-stabilizing circuit will
9th DC power signal carries out linear voltage stabilization processing, exports the tenth DC power signal, and the tenth DC power signal is insertion
Formula multi-media memory is powered.
In addition, display instrument further includes microprocessor.Power module 100 further includes the second linear voltage-stabilizing circuit 150.The
The input terminal of bilinear regulator circuit 150 is connected with the output terminal of immunity module 110, the second linear voltage-stabilizing circuit 150 it is defeated
The power input of outlet and microprocessor connects.
Second source signal is carried out linear voltage stabilization processing by the second linear voltage-stabilizing circuit 150, exports the 11st DC power supply
Signal, the 11st DC power signal are microprocessor power supply.
In addition, the utility model embodiment also provides a kind of automobile, including the above-mentioned display instrument for automobile.
Embodiment described above is only to illustrate the technical solution of the utility model, rather than its limitations；Although with reference to before
Embodiment is stated the utility model is described in detail, it will be understood by those of ordinary skill in the art that：It still can be with
Modify to the technical solution described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；And
These modifications are replaced, and the essence of appropriate technical solution is departed from the spirit of various embodiments of the utility model technical solution
And scope, it should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of display instrument for automobile, it is characterised in that including power module, processor and backlight drive circuit；Institute
Stating power module includes immunity module, step-up DC/DC module and voltage-dropping type DCDC modules；
The input terminal connection external power supply of the immunity module, the output terminal of the immunity module respectively with the booster type
The input terminal connection of the input terminal of DCDC modules, the voltage-dropping type DCDC modules, the first output of the voltage-dropping type DCDC modules
End is connected with the power input of the processor, output terminal and the backlight drive circuit of the step-up DC/DC module
Power input connects；
The immunity module receives the first power supply signal of external power supply, and filters out the letter of the interference in first power supply signal
Number, export second source signal；
The voltage-dropping type DCDC modules handle the second source signal by decompression, export the 3rd DC power signal, institute
The 3rd DC power signal is stated to power for the processor；
The step-up DC/DC module handles the second source signal by boosting, exports the 4th DC power signal, institute
The 4th DC power signal is stated to power for the backlight drive circuit.
2. it is used for the display instrument of automobile as claimed in claim 1, it is characterised in that the immunity module is filtered including high frequency
Wave circuit, common mode filtering circuit, Schottky diode and π type filter circuits；
The input terminal of the high-frequency filter circuit is connected with external power supply, the output terminal and common mode filtering of the high-frequency filter circuit
Circuit input terminal connection, the input terminal of this common mode filtering circuit be connected with the anode metal end of the Schottky diode,
The N-type substrate end of the Schottky diode is connected with the input terminal of the π types filter circuit；The π types filter circuit it is defeated
The input terminal with the step-up DC/DC module, the input terminal of the voltage-dropping type DCDC modules are connected outlet respectively；
The high-frequency filter circuit receives the first power supply signal of external power supply, and filters out the high frequency in first power supply signal
Interference signal, exports the 5th DC power signal；
The common mode filtering circuit receives the 5th DC power signal, and filters out being total in the 5th DC power signal
Mould interference signal, exports the 6th DC power signal；
The π types filter circuit receives the 6th DC power signal by the Schottky diode, and filters out described
Middle low-frequency interference signal in 6th DC power signal, exports the second source signal.
3. it is used for the display instrument of automobile as claimed in claim 2, it is characterised in that the high-frequency filter circuit includes first
Capacitance and the second capacitance；
The output terminal of the input terminal of the high-frequency filter circuit and the high-frequency filter circuit is the first of first capacitance
End, the second end of first capacitance connect the first end of the second capacitance, the second end connection ground terminal of second capacitance.
4. as claimed in claim 2 be used for automobile display instrument, it is characterised in that the π types filter circuit include inductance,
3rd capacitance, the 4th capacitance and the first electrolytic capacitor；
The N-type substrate end with the Schottky diode, the first end of the 3rd capacitance connect the first end of the inductance respectively
Connect；The input terminal, described of the second end of the inductance first end with the 4th capacitance, the step-up DC/DC module respectively
The input terminal connection of voltage-dropping type DCDC modules；
The first end of first electrolytic capacitor is connected with the second end of the first end of the inductance or the inductance；
Second end, the second end of the 4th capacitance of 3rd capacitance connect ground with the second end of first electrolytic capacitor
End.
5. as claimed in claim 2 be used for automobile display instrument, it is characterised in that the π types filter circuit include inductance,
Magnetic bead, the 3rd capacitance and the 4th capacitance；
The first end of the magnetic bead is connected with the N-type substrate end of the Schottky diode, the second end of the magnetic bead with it is described
The first end connection of inductance, the second end of the inductance are connected with the input terminal of the power module；The first end of the magnetic bead
Or the second end of the magnetic bead is connected with the first end of the 3rd capacitance, first end and the inductance of the 4th capacitance
Second end connects；Or
The N-type substrate end of the Schottky diode is connected with the first end of the inductance, the second end of the inductance with it is described
The first end connection of magnetic bead, the second end of the magnetic bead are connected with the input terminal of the power module；The of 3rd capacitance
One end is connected with the first end of the inductance, the second end of the first end of the magnetic bead or the magnetic bead and the 4th capacitance
First end connects；
The second end of 3rd capacitance and the second end of the 4th capacitance are all connected with ground terminal.
6. it is used for the display instrument of automobile as claimed in claim 2, it is characterised in that the immunity module further includes first
Resistance and second resistance；
The first end of the first resistor is connected with the output terminal of the high-frequency filter circuit, the second termination of the first resistor
Ground terminal；
The first end of the second resistance is connected with the output terminal of the π types filter circuit, the second termination of the second resistance
Ground terminal.
7. it is used for the display instrument of automobile as claimed in claim 1, it is characterised in that the display instrument, which further includes, to be compared
Device；
The input terminal of the comparator is connected with the output terminal of the immunity module, the output terminal of the comparator and the place
The first control signal connection of device is managed, the first control output end of the processor is enabled with the step-up DC/DC module
End connection, the second control output end of the processor is connected with the Enable Pin of the voltage-dropping type DCDC modules；
For the comparator by the output voltage of the immunity module compared with reference voltage, output is corresponding with comparative result
Level signal, the processor controls the step-up DC/DC module or the voltage-dropping type DCDC according to the level signal
Module whether out-put supply signal.
8. it is used for the display instrument of automobile as claimed in claim 1, it is characterised in that the display instrument further includes computing and puts
Big device and sampling resistor；
The sampling resistor is connected on the power input of the backlight drive circuit and the output of the step-up DC/DC module
Between end, the first input end of the operational amplifier is connected with the first end of the sampling resistor, the operational amplifier
Second input terminal is connected with the second end of the sampling resistor；
The output terminal of the operational amplifier is connected with the second control signal of the processor, the second control of the processor
Output terminal processed connects the Enable Pin of the step-up DC/DC module；
The operational amplifier gathers the voltage difference at the sampling resistor both ends, exports value of magnification corresponding with the voltage difference,
The processor controls whether the step-up DC/DC module exports electricity according to the value of magnification and the comparative result of predetermined threshold value
Source signal.
9. it is used for the display instrument of automobile as claimed in claim 1, it is characterised in that the display instrument further includes USB moulds
Block, SDRAM memory, WIFI module and built-in multimedia memory；The power module further includes the first linear voltage stabilization electricity
Road；
The voltage-dropping type DCDC modules further include the second output terminal, the 3rd output terminal and the 4th output terminal, second output terminal
It is connected with the power input of the USB module, the power input of the 3rd output terminal and the SDRAM memory connects
Connect, the 4th output terminal is connected with the power input of the WIFI module；
The input terminal of first linear voltage-stabilizing circuit is connected with the 4th output terminal, first linear voltage-stabilizing circuit it is defeated
Outlet is connected with the power input of the built-in multimedia memory；
The voltage-dropping type DCDC modules handle the second source signal by multiple decompression, export the 7th DC power supply respectively
Signal, the 8th DC power signal and the 9th DC power signal, the 7th DC power signal supply for the USB module
Electricity, the 8th DC power signal are powered for the SDRAM memory, and the 9th DC power signal is the WIFI moulds
Block is powered；
9th DC power signal is carried out linear voltage stabilization processing by first linear voltage-stabilizing circuit, exports the tenth direct current
Source signal, the tenth DC power signal are powered for the built-in multimedia memory.
10. a kind of automobile, it is characterised in that be used for the display instrument of automobile including claim 1 to 9 any one of them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721082146.0U CN207241434U (en) | 2017-08-25 | 2017-08-25 | Display instrument and automobile for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721082146.0U CN207241434U (en) | 2017-08-25 | 2017-08-25 | Display instrument and automobile for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207241434U true CN207241434U (en) | 2018-04-17 |
Family
ID=61883527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721082146.0U Active CN207241434U (en) | 2017-08-25 | 2017-08-25 | Display instrument and automobile for automobile |
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| Country | Link |
|---|---|
| CN (1) | CN207241434U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110370930A (en) * | 2019-08-23 | 2019-10-25 | 河南科技大学 | CAN bus based electric tractor virtual instrument |
| CN112994425A (en) * | 2021-02-07 | 2021-06-18 | 杰华特微电子（杭州）有限公司 | Noise suppression method, noise suppression circuit and switching circuit |
| CN113421529A (en) * | 2021-05-25 | 2021-09-21 | 东风电驱动***有限公司 | Automobile instrument liquid crystal backlight protection circuit and method, automobile instrument and storage medium |
| CN114257079A (en) * | 2021-12-23 | 2022-03-29 | 无锡睿勤科技有限公司 | Power utilization equipment and power supply system |
| CN116683749A (en) * | 2023-07-28 | 2023-09-01 | 成都工业学院 | Energy-storage anti-interference power supply for mining underground sensor |
-
2017
- 2017-08-25 CN CN201721082146.0U patent/CN207241434U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110370930A (en) * | 2019-08-23 | 2019-10-25 | 河南科技大学 | CAN bus based electric tractor virtual instrument |
| CN112994425A (en) * | 2021-02-07 | 2021-06-18 | 杰华特微电子（杭州）有限公司 | Noise suppression method, noise suppression circuit and switching circuit |
| CN112994425B (en) * | 2021-02-07 | 2022-07-15 | 杰华特微电子股份有限公司 | Noise suppression method, noise suppression circuit and switching circuit |
| CN113421529A (en) * | 2021-05-25 | 2021-09-21 | 东风电驱动***有限公司 | Automobile instrument liquid crystal backlight protection circuit and method, automobile instrument and storage medium |
| CN114257079A (en) * | 2021-12-23 | 2022-03-29 | 无锡睿勤科技有限公司 | Power utilization equipment and power supply system |
| CN116683749A (en) * | 2023-07-28 | 2023-09-01 | 成都工业学院 | Energy-storage anti-interference power supply for mining underground sensor |
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