CN103687149A - Workload indication control circuit and electronic device - Google Patents
Workload indication control circuit and electronic device Download PDFInfo
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- CN103687149A CN103687149A CN201210346080.7A CN201210346080A CN103687149A CN 103687149 A CN103687149 A CN 103687149A CN 201210346080 A CN201210346080 A CN 201210346080A CN 103687149 A CN103687149 A CN 103687149A
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Abstract
The invention discloses a workload indication control circuit used for indicating the workload of an electronic device. The workload indication control circuit comprises an inductive coupling circuit, a square wave generation and frequency adjustment circuit and an integration circuit, wherein the inductive coupling circuit is used for inducting a current output from a power input circuit of the electronic device and generating a corresponding inductive voltage in direct proportion to the workload; the square wave generation and frequency adjustment circuit is used for converting the inductive voltage generated by the inductive coupling circuit into a square wave signal with a specific frequency, and the amplitude value of the square wave signal is in direct proportion to the inductive voltage; the integration circuit is used for integrating the square wave signal, generating a sawtooth wave signal to an indication unit and driving a luminous unit to be periodically changed from bright to dark and from dark to bright. The invention further discloses the electronic device. According to the workload indication control circuit and the electronic device, the workload of the electronic device is indicated through the speed of driving the luminous unit to be changed in brightness.
Description
Technical field
The present invention relates to a kind of control circuit, particularly a kind of electronic installation of indicating the control circuit of live load and thering is this control circuit.
Background technology
At present, electronic installation can have a luminescence unit conventionally, LED lamp for example, and the different conditions of indication electronic installation, for example indication in charging process, this LED lantern festival changes color along with the carrying out of charging, thus whether reminding user is full of electricity.Yet present electronic installation, when normal work, cannot be indicated the operating state of electronic installation, such as live load etc., cannot allow user when the live load of electronic installation is heavier, close in time some application programs, thereby extend the useful life of electronic installation.
Summary of the invention
The invention provides a kind of live load indication control circuit and electronic installation, can indicate the live load of electronic installation, thereby for user, understand in time the operating state of electronic installation.
A kind of live load indication control circuit, for controlling the luminescence unit of an electronic installation, indicate the live load of electronic installation, this live load indication control circuit comprises an inductively coupled circuit, a square wave generation and frequency regulating circuit and an integrating circuit.This inductively coupled circuit for respond to electronic installation power supply input circuit output electric current and produce corresponding induced voltage, wherein, the electric current of this power supply input circuit output is directly proportional to live load, and the size of this induced voltage is directly proportional to the size of current of power supply input circuit output.This square wave produces and frequency regulating circuit is transformed into the square-wave signal with characteristic frequency for the induced voltage that this inductively coupled circuit is produced, and wherein, the amplitude of square-wave signal is directly proportional to the size of induced voltage.This integrating circuit and this square wave generation and frequency regulating circuit and this luminescence unit are connected, for the square-wave signal to this square wave produces and frequency regulating circuit is exported, carry out integration, thereby produce a sawtooth signal with this characteristic frequency to this indicating member, drive this luminescence unit periodically from bright to dark and from secretly to bright variation.
A kind of electronic installation, comprise a power supply input circuit and a luminescence unit, this power supply input circuit comprises primary coil, secondary coil, one rectifier diode and a commutation capacitor, wherein, primary coil is connected with mains supply, by this primary coil and secondary coil, convert mains voltage to a less alternating voltage, this rectifier diode and commutation capacitor form a current rectifying and wave filtering circuit, the ac voltage rectifier of this secondary coil output is become to a direct voltage, and the consuming components that offers electronic installation is powered, this electronic installation also comprises a live load indication control circuit.This live load indication control circuit comprises: an inductively coupled circuit, a square wave generation and frequency regulating circuit and an integrating circuit.This inductively coupled circuit for respond to electronic installation power supply input circuit secondary coil output electric current and produce corresponding induced voltage, wherein, the electric current of secondary coil output is directly proportional to the live load of electronic installation, and the size of this induced voltage is directly proportional to the size of current of power supply input circuit output.This square wave produces and frequency regulating circuit is transformed into the square-wave signal with characteristic frequency for the induced voltage that this inductively coupled circuit is produced, and wherein, the amplitude of square-wave signal is directly proportional to the size of induced voltage.This integrating circuit and this square wave generation and frequency regulating circuit and this luminescence unit are connected, for the square-wave signal to this square wave produces and frequency regulating circuit is exported, carry out integration, thereby produce a sawtooth signal with this characteristic frequency to this indicating member, drive this luminescence unit periodically from bright to dark and from secretly to bright variation.
Live load of the present invention is indicated control circuit and is had the electronic installation of this control circuit, can be when live load be larger, the light and shade quickly of controlling luminescence unit changes, at live load hour, light and shade variation is slow more slowly to control luminescence unit, thereby give user, points out accordingly.
Accompanying drawing explanation
Fig. 1 is the functional block diagram in an embodiment of the present invention with the electronic installation of live load indication control circuit.
Fig. 2 is the schematic appearance in an embodiment of the present invention with the electronic installation of live load indication control circuit.
Fig. 3 is the physical circuit figure in first embodiment of the invention with the electronic installation of live load indication control circuit.
Fig. 4 is the square-wave signal of live load indication control circuit generation in an embodiment of the present invention and the schematic diagram of sawtooth signal.
Fig. 5 is the physical circuit figure in second embodiment of the invention with the electronic installation of live load indication control circuit.
Main element symbol description
| |
100 |
| Power |
10 |
| Live load |
20 |
| |
30 |
| Inductively coupled |
201 |
| Square wave produces and |
202 |
| |
203 |
| |
101 |
| |
102 |
| Rectifier diode | D1 |
| Commutation capacitor | C1 |
| Resistance | R1~R8 |
| Coupling coil | 2011 |
| Electric capacity | C2~C5 |
| Output | OT，OT1 |
| Operational amplifier | A1、A2 |
| Sawtooth signal | Vs |
| Square-wave signal | Vf |
| LED lamp | LD |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Referring to Fig. 1, is one to have the functional block diagram of the electronic installation 100 of live load indication control circuit.This electronic installation 100(with live load indication control circuit hereinafter referred to as: electronic installation 100) comprise power supply input circuit 10, live load indication control circuit 20 and luminescence unit 30.
Wherein, power supply input circuit 10 is for accessing mains supply, and is converted into after direct current the consuming components power supply for electronic installation 100, wherein, the constant voltage of power supply input circuit 10 output, when the consuming components of work is more, the electric current of power supply input circuit 10 outputs is larger.The brightness of this luminescence unit 30 is directly proportional to the voltage at the electric current flowing through and two ends.
This live load indication control circuit 20 comprises that the inductively coupled circuit 201, the square wave that connect successively produce and frequency regulating circuit 202 and an integrating circuit 203.This power induction inductive coupling circuit is exported to the electric current of consuming components and is produced corresponding induced voltage for induction power supply input circuit 10, and wherein, the size of this induced voltage is directly proportional to the size of current of power supply input circuit 10 outputs.
This square wave produces and frequency regulating circuit 202 is transformed into the square-wave signal with characteristic frequency for the induced voltage that this inductively coupled circuit 201 is produced, and wherein, the amplitude of square wave is directly proportional to the size of induced voltage.This integrating circuit 203 produces with this square wave and frequency regulating circuit 202 and this luminescence unit 30 are connected, for the square-wave signal this square wave being produced and frequency regulating circuit 202 is exported, carry out integration, thereby produce a sawtooth signal with this characteristic frequency to this luminescence unit 30, drive this luminescence unit 30 by this characteristic frequency, from bright to dark and from secretly to bright variation.Wherein, when the electric current of power supply input circuit 10 output is large, this luminescence unit 30 is from bright to dark and fast from the speed secretly changing to bright variation, and when the electric current hour of power supply input circuit 10 outputs, this luminescence unit 30 is from bright to dark and slow from the speed secretly changing to bright variation.Thereby the live load of indication electronic installation 100.
Concrete, the maximum amplitude of this sawtooth signal equates with the amplitude of this square-wave signal, the voltage of sawtooth signal from zero to this maximum amplitude variation or from maximum amplitude, be changed to zero, thereby make luminescence unit 30 from secretly to bright variation or variation from bright to dark.When electronic installation 100 live loads are heavy, be that the current ratio of power supply input circuit 10 output is when larger, the magnitude of voltage changing in this sawtooth signal unit interval is large, thereby it is also large to control the brightness value changing in 30 unit interval of this luminescence unit, thereby give a kind of fast-changing sensation of people, otherwise, shelves electronic installation 100 live loads are when lighter, be the current ratio of power supply input circuit 10 output hour, the magnitude of voltage changing in this sawtooth signal unit interval is less, thereby it is also little to control the brightness value changing in 30 unit interval of this luminescence unit, thereby give people a kind of sensation changing at a slow speed.
Refer to Fig. 2, in the present invention, the outward appearance of this luminescence unit 30 can be made heart as shown in Figure 2, thus simulation people heartbeat.Obviously, this luminescence unit 30 can be arbitrary pattern.This luminescence unit 30 also can be used as the backlight of a translucent pattern, and this translucent pattern is heart as shown in Figure 2, thereby makes this translucent pattern periodically from secretly to bright and variation from bright to dark, simulation people's heartbeat.
Referring to Fig. 3, is the physical circuit figure of electronic installation in first embodiment of the invention 100.Wherein, this power supply input circuit 10 comprises primary coil 101, secondary coil 102, rectifier diode D1, commutation capacitor C1 and resistance R 1, wherein, primary coil 101 is connected with mains supply, by this primary coil 101 and secondary coil 102, converts mains voltage to a less alternating voltage.This rectifier diode D1 and commutation capacitor C1 form a current rectifying and wave filtering circuit, the ac voltage rectifier of these secondary coil 102 outputs is become to a direct voltage, and offer consuming components, power supplies such as processor, memory.Wherein, the direct voltage of the alternating voltage of secondary coil 102 outputs and rectifier diode D1 and commutation capacitor C1 output keeps certain value, the electric current of power supply input circuit 10 outputs is also that the electric current of secondary coil 102 outputs is directly proportional to the live load of electronic installation 100.That is, when the live load of electronic installation 100 is heavy, the electric current of secondary coil 102 outputs is large, and when the live load of electronic installation 100 is light, the electric current of secondary coil 102 outputs is little.
In the present embodiment, the inductively coupled circuit 201 of this live load indication control circuit 20 comprises a coupling coil 2011, diode D2 and capacitor C 2, this coupling coil 2011 is coupled with the secondary coil 102 of this power supply input circuit 10, as everyone knows, coupling coil 2011 is relevant with coil turn separately to the current ratio of secondary coil 102, and coupling coil 2011 is a fixed value with the current ratio of secondary coil 102.Thereby the electric current of coupling coil 2011 is directly proportional to the electric current of this secondary coil 102, obviously, when the consuming components that connects when power supply input circuit 10 is more, the load of electronic installation 100 is larger, and the electric current of secondary coil 102 is larger, thereby the electric current that coupling coil 2011 couplings produce is also larger.
This diode D2 connects with capacitor C 2, and the connected node of diode D2 and capacitor C 2 forms the output OT of this inductively coupled circuit 201.This diode D2 and capacitor C 2 same formation one current rectifying and wave filtering circuits, become a constant current voltage by the current commutates of coupling coil 2011 and export through this output OT.
This square wave produces and frequency regulating circuit 202 comprises an operational amplifier A 1 and resistance R 2, R3, R4 and capacitor C 3.This resistance R 2 and R3 are series between the output OT and ground of this inductively coupled circuit 201, and the normal phase input end of the connected node of resistance R 2 and R3 and operational amplifier A 1 (in figure not label) is connected.This resistance R 4 and capacitor C 3 are series between the output (in figure not label) and ground of this operational amplifier A 1, and the connected node of resistance R 4 and capacitor C 3 and the inverting input of this operational amplifier A 1 (in figure not label) are connected.
This integrating circuit 203 comprises a resistance R 5 and capacitor C 4, this resistance R 5 and capacitor C 4 are series between the output and ground of this operational amplifier A 1, and the connected node of this resistance R 5 and capacitor C 4 forms the output OT1 of this integrating circuit 203 and is connected with the positive pole of this luminescence unit 30.
When electronic installation 100 is in running order, the electric current in the secondary coil 102 of the coupling coil 2011 coupling power input circuits 10 of the inductively coupled circuit 201 of this live load indication control circuit 20 and produce the induced current being directly proportional to this secondary coil 102.This diode D2 and capacitor C 2 carry out this induced current to produce a constant current voltage Vd after rectifying and wave-filtering.
If the impedance of this capacitor C 3 is jwC3, easily know, as shown in A in Fig. 4, the square-wave signal Vf=Vd*R3 (jwCR4+1) that square wave produces and frequency regulating circuit 202 is exported/(R3+R2), wherein, square wave produces and the frequency of the square-wave signal Vf that frequency regulating circuit 202 is exported equals 2 π CR4, and amplitude F is directly proportional to the size of the voltage Vd of inductively coupled circuit 201 outputs.
The square-wave signal Vf that 203 pairs of these square waves of this integrating circuit produce and frequency regulating circuit 202 is exported carries out integration and obtains just like the sawtooth signal Vs shown in B in Fig. 4, wherein, the amplitude peak F of this sawtooth signal Vs equates with the amplitude of this square-wave signal Vf, and the frequency of this sawtooth signal Vs equates with the frequency of this square-wave signal Vf.As shown in B in Fig. 4, the voltage of this sawtooth signal Vs from the zero maximum amplitude that changes to, is then changed to zero from maximum amplitude in one-period.
In this physical circuit, this luminescence unit 30 comprises at least one LED lamp LD, and the positive pole of this LED lamp LD is connected with the output OT1 of this integrating circuit 203, minus earth.Yi Zhi, the cathode voltage of LED lamp LD is higher, and LED lamp LD brightness is larger, otherwise less.Thereby according to the variation from small to large and from big to small of the voltage cycle ground of this sawtooth signal Vs, the brightness of this LED lamp LD also periodically changes from small to large and from big to small.
Thereby, when the load of electronic installation 100 is larger, the electric current of the secondary coil 102 of power supply input circuit 10 is larger, inductively coupled circuit 201 senses that constant current voltage Vd is larger, square wave produces and the amplitude of the square-wave signal Vf that frequency regulating circuit 202 is exported is larger, thereby the maximum amplitude of sawtooth signal Vs is larger.Frequency one timing at sawtooth signal Vs, when sawtooth signal Vs maximum amplitude is larger, the magnitude of voltage changing in the sawtooth signal Vs unit interval is larger, thereby the brightness value changing in 30 unit interval of luminescence unit is larger, thereby gives fast-changing sensation.Otherwise, when the load of electronic installation 100 more hour, the electric current of the secondary coil 102 of power supply input circuit 10 is less, inductively coupled circuit 201 senses that constant current voltage Vd is less, square wave produces and the amplitude of the square-wave signal Vf that frequency regulating circuit 202 is exported is less, thereby the maximum amplitude of sawtooth signal Vs is less.Frequency one timing at sawtooth signal Vs, sawtooth signal Vs maximum amplitude more hour, the magnitude of voltage changing in the sawtooth signal Vs unit interval is less, thereby the brightness value changing in 30 unit interval of luminescence unit is less, thereby gives the sensation changing at a slow speed.
Referring to Fig. 5, is the physical circuit figure of electronic installation in second embodiment of the invention 100.Electronic installation 100 in this second execution mode is from the difference of the first execution mode: only inductively coupled circuit 201 is different with the inductively coupled circuit 201 in this first execution mode, and other structures are all identical.
In the present embodiment, this inductively coupled circuit 201 comprises an operational amplifier A 2 and resistance R 6, R7, R8, capacitor C 5, diode D3 and an output OT2.Wherein, this resistance R 6 is connected in the loop of secondary coil 102 of this power supply input circuit 10, crosses the electric current of secondary coil 102 for senses flow.This resistance R 7 and resistance R 8 are series between this resistance R 6 one end and this output OT2 near this secondary coil 102, this resistance R 7 and the connected node of resistance R 8 and the normal phase input end of this operational amplifier A 2 (in figure not label) are connected, and this electric capacity and this resistance R 7 are parallel between the normal phase input end of this output OT2 and this operational amplifier A 2.This diode D3 is connected between the output (in figure not label) of this operational amplifier A 2 and the output OT2 of this inductively coupled circuit 201.The inverting input of this operational amplifier A 2 (in figure not label) also passes through grounding through resistance.
Thereby the electric current of establishing secondary coil 102 is I, the voltage of establishing the output OT2 of this inductively coupled circuit 201 is Vot2.Thereby, known Vot2=I*R6*R8/R7.That is, the voltage of the output OT2 of this inductively coupled circuit 201 is directly proportional to the electric current of this secondary coil 102.This inductively coupled circuit 201 is undertaken exporting this voltage being directly proportional to the electric current of secondary coil 102 to this square wave generation and frequency regulating circuit 202 after rectifying and wave-filtering by diode D3 and capacitor C 5.
Square wave generation in this second execution mode and frequency regulating circuit 202 and integrating circuit 203 are in full accord with the structure in this first execution mode, therefore do not add to repeat at this.
As previously mentioned, the square-wave signal that square wave produces and frequency regulating circuit 202 generation amplitudes are directly proportional to these inductively coupled circuit 201 output voltages.Integrating circuit 203 produces maximum amplitudes and the sawtooth signal that this square wave produces and frequency regulating circuit 202 amplitudes equate, thereby drives this luminescence unit 30 from secretly to bright and from bright to secretly periodically variation.
Wherein, this electronic installation 100 can be the devices such as mobile phone, digital photo frame, digital camera, e-book.
The electronic installation 100 with live load indication control circuit of the present invention, can be when live load be larger, the light and shade of controlling luminescence unit 30 changes fast, at live load hour, the light and shade of controlling luminescence unit 30 changes slowly, thereby give user, points out accordingly.
Claims (18)
1. live load is indicated a control circuit, indicates the live load of electronic installation for controlling the luminescence unit of an electronic installation, it is characterized in that, this live load indication control circuit comprises:
One inductively coupled circuit, for respond to electronic installation power supply input circuit output electric current and produce corresponding induced voltage, wherein, the electric current of this power supply input circuit output is directly proportional to live load, and the size of this induced voltage is directly proportional to the size of current of power supply input circuit output;
One square wave produces and frequency regulating circuit, for the induced voltage that this inductively coupled circuit is produced, is transformed into the square-wave signal with characteristic frequency, and wherein, the amplitude of square-wave signal is directly proportional to the size of induced voltage; And
One integrating circuit, be connected with this square wave generation and frequency regulating circuit and this luminescence unit, for the square-wave signal to this square wave produces and frequency regulating circuit is exported, carry out integration, thereby produce a sawtooth signal with this characteristic frequency to this luminescence unit, drive this luminescence unit periodically from bright to dark and from secretly to bright variation.
2. live load as claimed in claim 1 is indicated control circuit, it is characterized in that, the maximum amplitude of this sawtooth signal produces with this square wave and the amplitude of the square-wave signal that frequency regulating circuit produces equates, the voltage of sawtooth signal changes or is changed to zero from maximum amplitude from zero to this maximum amplitude, thereby make luminescence unit from secretly to bright variation or variation from bright to dark, when electronic installation live load is heavy, the current ratio of power supply input circuit output is larger, the magnitude of voltage changing in this sawtooth signal unit interval is large, thereby it is also large to control the brightness value changing in this luminescence unit unit interval, when electronic installation live load is lighter, the electric current of power supply input circuit output is smaller, the magnitude of voltage changing in this sawtooth signal unit interval is less, thereby it is also little to control the brightness value changing in this luminescence unit unit interval.
3. live load as claimed in claim 1 is indicated control circuit, it is characterized in that, this inductively coupled circuit comprises a coupling coil, the first diode and the first electric capacity, the secondary coil coupling of the power supply input circuit of this coupling coil and electronic installation, the electric current of coupling coil is directly proportional to the electric current of this secondary coil; This first diode and the first capacitances in series, and the connected node of the first diode and the first electric capacity forms the output of this inductively coupled circuit, the first diode and the first electric capacity form a current rectifying and wave filtering circuit, the current commutates of the induction of coupling coil is become to a constant current voltage and export through the output of this inductively coupled circuit.
4. live load as claimed in claim 3 is indicated control circuit, it is characterized in that, this square wave produces and frequency regulating circuit comprises an operational amplifier and the first resistance, the second resistance, the 3rd resistance and the second electric capacity, this first resistance and the second resistance are series between the output and ground of this inductively coupled circuit, and the connected node of the first resistance and the second resistance is connected with the normal phase input end of operational amplifier, the 3rd resistance and the second capacitances in series are between the output and ground of this operational amplifier, and the 3rd resistance and the connected node of the second electric capacity and the inverting input of this operational amplifier are connected.
5. live load as claimed in claim 4 is indicated control circuit, it is characterized in that, this integrating circuit comprises one the 4th resistance and the 3rd electric capacity, the 4th resistance and the 3rd capacitances in series are between the output and ground of this operational amplifier, and the connected node of the 4th resistance and the 3rd electric capacity forms the output of this integrating circuit and is connected with the positive pole of this luminescence unit.
6. live load as claimed in claim 1 is indicated control circuit, it is characterized in that, this inductively coupled circuit comprises one first operational amplifier and the 5th resistance, the 6th resistance, the 7th resistance, the 4th electric capacity, the second diode and an output, wherein, the 5th resistance is connected in the loop of secondary coil of this power supply input circuit, the 6th resistance and the 7th resistance are series between the 5th resistance one end and this output near this secondary coil, the 6th resistance is connected with the normal phase input end of this first operational amplifier with the connected node of the 7th resistance, the 4th electric capacity and the 6th resistance are parallel between the output of this inductively coupled circuit and the normal phase input end of this first operational amplifier, this second diode is connected between the output of this first operational amplifier and the output of this inductively coupled circuit, the inverting input of this first operational amplifier passes through grounding through resistance.
7. live load as claimed in claim 6 is indicated control circuit, it is characterized in that, this square wave produces and frequency regulating circuit comprises one second operational amplifier and the first resistance, the second resistance, the 3rd resistance and the second electric capacity, this first resistance and the second resistance are series between the output and ground of this inductively coupled circuit, and the connected node of the first resistance and the second resistance is connected with the normal phase input end of the second operational amplifier, the 3rd resistance and the second capacitances in series are between the output and ground of this second operational amplifier, and the connected node of the 3rd resistance and the second electric capacity is connected with the inverting input of this second operational amplifier.
8. live load as claimed in claim 7 is indicated control circuit, it is characterized in that, this integrating circuit comprises one the 4th resistance and the 3rd electric capacity, the 4th resistance and the 3rd capacitances in series are between the output and ground of this second operational amplifier, and the connected node of the 4th resistance and the 3rd electric capacity forms the output of this integrating circuit and is connected with the positive pole of this luminescence unit.
9. an electronic installation, comprise a power supply input circuit and a luminescence unit, this power supply input circuit comprises primary coil, secondary coil, one rectifier diode and a commutation capacitor, wherein, primary coil is connected with mains supply, by this primary coil and secondary coil, convert mains voltage to a less alternating voltage, this rectifier diode and commutation capacitor form a current rectifying and wave filtering circuit, the ac voltage rectifier of this secondary coil output is become to a direct voltage, and the consuming components that offers electronic installation is powered, it is characterized in that, this electronic installation also comprises a live load indication control circuit, this live load indication control circuit comprises:
One inductively coupled circuit, for respond to electronic installation power supply input circuit secondary coil output electric current and produce corresponding induced voltage, wherein, the electric current of secondary coil output is directly proportional to the live load of electronic installation, and the size of this induced voltage is directly proportional to the size of current of power supply input circuit output;
One square wave produces and frequency regulating circuit, for the induced voltage that this inductively coupled circuit is produced, is transformed into the square-wave signal with characteristic frequency, and wherein, the amplitude of square-wave signal is directly proportional to the size of induced voltage; And
One integrating circuit, be connected with this square wave generation and frequency regulating circuit and this luminescence unit, for the square-wave signal to this square wave produces and frequency regulating circuit is exported, carry out integration, thereby produce a sawtooth signal with this characteristic frequency to this luminescence unit, drive this luminescence unit periodically from bright to dark and from secretly to bright variation.
10. electronic installation as claimed in claim 9, it is characterized in that, the maximum amplitude of this sawtooth signal produces with this square wave and the amplitude of the square-wave signal that frequency regulating circuit produces equates, the voltage of sawtooth signal changes or is changed to zero from maximum amplitude from zero to this maximum amplitude, thereby make luminescence unit from secretly to bright variation or variation from bright to dark, when electronic installation live load is heavy, when the current ratio of power supply input circuit output is larger, the magnitude of voltage changing in this sawtooth signal unit interval is large, thereby it is also large to control the brightness value changing in this luminescence unit unit interval, when electronic installation live load is lighter, the current ratio of power supply input circuit output hour, the magnitude of voltage changing in this sawtooth signal unit interval is less, thereby it is also little to control the brightness value changing in this luminescence unit unit interval.
11. electronic installations as claimed in claim 9, it is characterized in that, this inductively coupled circuit comprises a coupling coil, the first diode and the first electric capacity, the secondary coil coupling of the power supply input circuit of this coupling coil and electronic installation, the electric current of coupling coil is directly proportional to the electric current of this secondary coil; This first diode and the first capacitances in series, and the connected node of the first diode and the first electric capacity forms the output of this inductively coupled circuit, the first diode and the first electric capacity form a current rectifying and wave filtering circuit, the current commutates of the induction of coupling coil is become to a constant current voltage and export through the output of this inductively coupled circuit.
12. electronic installations as claimed in claim 11, it is characterized in that, this square wave produces and frequency regulating circuit comprises an operational amplifier and the first resistance, the second resistance, the 3rd resistance and the second electric capacity, this first resistance and the second resistance are series between the output and ground of this inductively coupled circuit, and the connected node of the first resistance and the second resistance is connected with the normal phase input end of operational amplifier, the 3rd resistance and the second capacitances in series are between the output and ground of this operational amplifier, and the 3rd resistance and the connected node of the second electric capacity and the inverting input of this operational amplifier are connected.
13. electronic installations as claimed in claim 12, it is characterized in that, this integrating circuit comprises one the 4th resistance and the 3rd electric capacity, the 4th resistance and the 3rd capacitances in series are between the output and ground of this operational amplifier, and the connected node of the 4th resistance and the 3rd electric capacity forms the output of this integrating circuit and is connected with the positive pole of this luminescence unit.
14. electronic installations as claimed in claim 10, it is characterized in that, this inductively coupled circuit comprises one first operational amplifier and the 5th resistance, the 6th resistance, the 7th resistance, the 4th electric capacity, the second diode and an output, wherein, the 5th resistance is connected in the loop of secondary coil of this power supply input circuit, the 6th resistance and the 7th resistance are series between the 5th resistance one end and this output near this secondary coil, the 6th resistance is connected with the normal phase input end of this first operational amplifier with the connected node of the 7th resistance, the 4th electric capacity and the 6th resistance are parallel between the output of this inductively coupled circuit and the normal phase input end of this first operational amplifier, this second diode is connected between the output of this first operational amplifier and the output of this inductively coupled circuit, the inverting input of this first operational amplifier passes through grounding through resistance.
15. electronic installations as claimed in claim 14, it is characterized in that, this square wave produces and frequency regulating circuit comprises one second operational amplifier and the first resistance, the second resistance, the 3rd resistance and the second electric capacity, this first resistance and the second resistance are series between the output and ground of this inductively coupled circuit, and the connected node of the first resistance and the second resistance is connected with the normal phase input end of the second operational amplifier, the 3rd resistance and the second capacitances in series are between the output and ground of this second operational amplifier, and the connected node of the 3rd resistance and the second electric capacity is connected with the inverting input of this second operational amplifier.
16. electronic installations as claimed in claim 15, it is characterized in that, this integrating circuit comprises one the 4th resistance and the 3rd electric capacity, the 4th resistance and the 3rd capacitances in series are between the output and ground of this second operational amplifier, and the connected node of the 4th resistance and the 3rd electric capacity forms the output of this integrating circuit and is connected with the positive pole of this luminescence unit.
17. electronic installations as claimed in claim 9, is characterized in that, described luminescence unit comprises at least one LED lamp.
18. electronic installations as claimed in claim 9, is characterized in that, described electronic installation is a kind of in mobile phone, digital photo frame, digital camera, e-book.
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| CN201210346080.7A CN103687149B (en) | 2012-09-18 | 2012-09-18 | Workload indication control circuit and electronic installation |
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|---|---|---|---|
| CN201210346080.7A CN103687149B (en) | 2012-09-18 | 2012-09-18 | Workload indication control circuit and electronic installation |
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| CN103687149A true CN103687149A (en) | 2014-03-26 |
| CN103687149B CN103687149B (en) | 2016-12-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107517536A (en) * | 2017-08-30 | 2017-12-26 | 深圳市新国都支付技术有限公司 | Breath light control circuit and electronic equipment |
| CN113741667A (en) * | 2021-05-18 | 2021-12-03 | 深圳市瑞声元科技有限公司 | Computer power supply, method for presenting load size of computer power supply through light effect and computer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107517536A (en) * | 2017-08-30 | 2017-12-26 | 深圳市新国都支付技术有限公司 | Breath light control circuit and electronic equipment |
| CN107517536B (en) * | 2017-08-30 | 2020-01-17 | 深圳市新国都支付技术有限公司 | Breathing lamp control circuit and electronic equipment |
| CN113741667A (en) * | 2021-05-18 | 2021-12-03 | 深圳市瑞声元科技有限公司 | Computer power supply, method for presenting load size of computer power supply through light effect and computer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103687149B (en) | 2016-12-21 |
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Effective date of registration: 20180226 Address after: The Guangxi Zhuang Autonomous Region Nanning hi tech Zone headquarters Road No. 18, China ASEAN enterprise headquarters base three 5# workshop Patentee after: NANNING FUGUI PRECISION INDUSTRIAL CO., LTD. Address before: 518109 Guangdong city of Shenzhen province Baoan District Longhua Town Industrial Zone tabulaeformis tenth East Ring Road No. 2 two Co-patentee before: Hon Hai Precision Industry Co., Ltd. Patentee before: Hongfujin Precise Industry (Shenzhen) Co., Ltd. |