CN103389406B - Voltage indicating circuit and light fixture - Google Patents
Voltage indicating circuit and light fixture Download PDFInfo
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- CN103389406B CN103389406B CN201210146963.3A CN201210146963A CN103389406B CN 103389406 B CN103389406 B CN 103389406B CN 201210146963 A CN201210146963 A CN 201210146963A CN 103389406 B CN103389406 B CN 103389406B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
A kind of voltage indicating circuit, including: trigger module, it is judged that whether input voltage is in preset range, if input voltage is not in preset range, then export indication signal, described indication signal includes under-voltage signal and overvoltage signal；Indicating circuit, according to under-voltage signal or the overvoltage signal of described trigger module, instructed voltage over range.Above-mentioned voltage indicating circuit and there is the light fixture of this voltage indicating circuit, by trigger module judge input voltage whether beyond preset range, if beyond; would indicate over range, it is to avoid electrical equipment works long hours under the under-voltage or duty of overvoltage.
Description
Technical field
The present invention relates to indicating circuit, particularly relate to a kind of voltage indicating circuit, further relate to a kind of light fixture.
Background technology
Existing light fixture is when line voltage is beyond rated voltage, it is impossible to reminds in time to client, causes light fixture
Long-time overpower or underpower work, lamp life reduces.
Summary of the invention
Based on this, it is necessary to provide the voltage indicating circuit of a kind of instructed voltage over range.
Voltage indicating circuit, including:
Trigger module, it is judged that whether input voltage is in preset range, if input voltage is not in preset range,
Then exporting indication signal, described indication signal includes under-voltage signal and overvoltage signal, and described trigger module includes
First resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the first switching tube, second open
Guan Guan, the first stabilivolt and the second stabilivolt, one end of described first resistance connects described first stabilivolt
Negative electrode, the other end of described first resistance connect one end of described 3rd resistance, the one of described 4th resistance
End and the negative electrode of described second stabilivolt, the anode of described first stabilivolt connects the one of described second resistance
End and the control end of the first switching tube, the other end of described second resistance connects the second of described first switching tube
End, the other end of described 3rd resistance connects the first end and one end of the 5th resistance of described first switching tube,
The other end of described 5th resistance connects the control end of described second switch pipe, the other end of described 4th resistance
Connecting the first end of described second switch pipe, the second end of described second switch pipe exports under-voltage signal, described
The anode output overvoltage signal of the second stabilivolt, described first resistance with the common node of described 3rd resistance is
The input anode of described trigger module, described second resistance is public with the second end of described first switching tube
Node is the input cathode of described trigger module；
Indicating circuit, according to under-voltage signal or the overvoltage signal of described trigger module, instructed voltage over range.
Wherein in an embodiment, described indicating circuit includes the first indicating circuit and the second indicating circuit,
Described first indicating circuit provides under-voltage instruction according to described under-voltage signal, and described second indicating circuit is according to institute
State overvoltage signal and provide overvoltage instruction.
Wherein in an embodiment, described first indicating circuit is the first light emitting diode, receives described owing
Luminescence after pressure signal, described second indicating circuit is the second light emitting diode, sends out after receiving described overvoltage signal
Light.
Wherein in an embodiment, described first switching tube is a NPN audion, a described NPN
The base stage of audion is the control end of the first switching tube, and the current collection extremely first of a described NPN audion is opened
Close the first end of pipe, the second end of transmitting extremely first switching tube of a described NPN audion.
Wherein in an embodiment, described second switch pipe is the 2nd NPN audion, described 2nd NPN
The base stage of audion is the control end of second switch pipe, and the current collection extremely second of described 2nd NPN audion is opened
Close the first end of pipe, the second end of the transmitting extremely second switch pipe of described 2nd NPN audion.
The present invention also provides for a kind of light fixture, including lamp, drive the drive circuit of lamp work, trigger module and
Indicating circuit；
The input anode of described trigger module is connected with the input anode of described drive circuit, described triggering
The input cathode of module is connected with the input cathode of described drive circuit, and described trigger module judges input
Whether voltage is in preset range, if input voltage is not in preset range, then exports indication signal, described
Indication signal shows that signal includes under-voltage signal and overvoltage signal, described trigger module include the first resistance, second
Resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the first switching tube, second switch pipe, the first voltage stabilizing
Pipe and the second stabilivolt, one end of described first resistance connects the negative electrode of described first stabilivolt, and described the
The other end of one resistance connects one end of described 3rd resistance, one end and described second of described 4th resistance
The negative electrode of stabilivolt, the anode of described first stabilivolt connects one end and first switching tube of described second resistance
Control end, the other end of described second resistance connects the second end of described first switching tube, described 3rd electricity
The other end of resistance connects the first end and one end of the 5th resistance of described first switching tube, described 5th resistance
The other end connects the control end of described second switch pipe, and the other end of described 4th resistance connects described second and opens
Closing the first end of pipe, the second end of described second switch pipe exports under-voltage signal, the sun of described second stabilivolt
Pole output overvoltage signal, described first resistance is described trigger module with the common node of described 3rd resistance
Input anode, described second resistance is described triggering with the common node of the second end of described first switching tube
The input cathode of module；
Indicating circuit, according to under-voltage signal or the overvoltage signal of described trigger module, instructed voltage over range.
Wherein in an embodiment, described indicating circuit includes the first indicating circuit and the second indicating circuit,
Described first indicating circuit provides under-voltage instruction according to described under-voltage signal, and described second indicating circuit is according to institute
State overvoltage signal and provide overvoltage instruction.
Wherein in an embodiment, described first indicating circuit is the first light emitting diode, receives described owing
Luminescence after pressure signal, described second indicating circuit is the second light emitting diode, sends out after receiving described overvoltage signal
Light.
Wherein in an embodiment, described first switching tube is a NPN audion, a described NPN
The base stage of audion is the control end of the first switching tube, and the current collection extremely first of a described NPN audion is opened
Close the first end of pipe, the second end of transmitting extremely first switching tube of a described NPN audion.
Wherein in an embodiment, described second switch pipe is the 2nd NPN audion, described 2nd NPN
The base stage of audion is the control end of second switch pipe, and the current collection extremely second of described 2nd NPN audion is opened
Close the first end of pipe, the second end of the transmitting extremely second switch pipe of described 2nd NPN audion.
Above-mentioned voltage indicating circuit and have the light fixture of this voltage indicating circuit, is judged defeated by trigger module
Enter whether voltage exceeds preset range, if beyond, indicate over range, it is to avoid electrical equipment works long hours
Under the under-voltage or duty of overvoltage.
Accompanying drawing explanation
The circuit of the voltage indicating circuit that Fig. 1 provides for an embodiment；
The circuit diagram of the light fixture that Fig. 2 provides for an embodiment.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage more clearly, below in conjunction with accompanying drawing and enforcement
Example, the present invention is described in more detail.Should be appreciated that specific embodiment described herein is only in order to solve
Release the present invention, be not intended to limit the present invention.
As it is shown in figure 1, the voltage indicating circuit that present embodiment provides, including trigger module 110 and instruction
Circuit 120.
Trigger module 110 judge input voltage whether in preset range, if input voltage is not in preset range
In, then exporting indication signal, indication signal includes under-voltage signal and overvoltage signal, indicating circuit 120 basis
The under-voltage signal of trigger module 110 or overvoltage signal designation voltage over range.
Trigger module 110 include the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4,
5th resistance R5, the first switching tube Q1, second switch pipe Q2, the first stabilivolt ZD1 and the second voltage stabilizing
Pipe ZD2.One end of first resistance R1 connects the negative electrode of the first stabilivolt ZD1, another of the first resistance R1
End connects one end of the 3rd resistance R3, one end of the 4th resistance R4 and the negative electrode of the second stabilivolt ZD2.
The anode of the first stabilivolt ZD1 connects one end and the control end of the first switching tube Q1 of the second resistance R2, the
The other end of three resistance R3 connects the first end and one end of the 5th resistance R5 of the first switching tube Q1, and second
The other end of resistance R2 connects second end of the first switching tube Q1, and the other end of the 5th resistance R5 connects the
The control end of two switching tube Q2, the other end of the 4th resistance R4 connects first end of second switch pipe Q2.
Second end of second switch pipe Q2 exports under-voltage signal, the anode output overvoltage signal of the second stabilivolt ZD2.
The input anode that common node is trigger module 110 of the first resistance R1 and the 3rd resistance R3, the second electricity
The input cathode that common node is trigger module 110 of second end of resistance R2 and the first switching tube Q1.
In the present embodiment, the first switching tube Q1 is a NPN audion, the base stage of a NPN audion
It is the control end of the first switching tube Q1, the of the current collection extremely first switching tube Q1 of a NPN audion
One end, second end of the transmitting extremely first switching tube Q1 of a NPN audion.
In the present embodiment, second switch pipe Q1 is the 2nd NPN audion, the base stage of the 2nd NPN audion
For the control end of second switch pipe Q2, the of the current collection of the 2nd NPN audion extremely second switch pipe Q2
One end, second end of the transmitting of the 2nd NPN audion extremely second switch pipe Q2.
Indicating module 120 includes the first indicating circuit 121 and the second indicating circuit 122, the first indicating circuit
121 provide under-voltage instruction according to under-voltage signal, and the second indicating circuit 122 provides overvoltage instruction according to overvoltage signal.
In the present embodiment, the first indicating circuit 121 is the first LED 1, receives second switch pipe Q2
Output under-voltage signal after luminous, the second indicating circuit 122 is the second LED 2, receives the
Luminescence after the overvoltage signal of the anode output of two stabilivolt ZD2.In order to preferably distinguish under-voltage instruction and overvoltage
Indicating, the first LED 1 and the second LED 2 are arranged to send the light of different colours,
To distinguish under-voltage and overvoltage.Such as first LED 1 Yellow light-emitting low temperature, the second LED 2
Glow.
Brief description operation principle once:
The input anode of trigger module 110 is just connecting the power input of the electrical equipment needing instructed voltage
Pole, the input cathode of trigger module 110 connects the power input of the electrical equipment needing instructed voltage and bears
Pole, the breakdown voltage of the second stabilivolt ZD2 breakdown voltage than the first stabilivolt ZD1 is big.Set according to electricity consumption
The standby range of nominal tension, arranges the first stabilivolt ZD1 and the breakdown voltage of the second stabilivolt ZD2, then when
When the range of nominal tension of electrical equipment is [U1, U2], the range of nominal tension [U1, U2] i.e. preset range,
The breakdown voltage arranging the first stabilivolt ZD1 is U1, and the breakdown voltage arranging the second stabilivolt ZD2 is U2,
Once the running voltage of electrical equipment is super goes beyond the scope, the most under-voltage or overvoltage, it indicates that circuit 120 is given
Under-voltage instruction or overvoltage instruction.
When the voltage that the input of voltage indicating circuit inputs is less than U1, the control end of the first switching tube Q1
For low level, being not turned on, the control end of second switch pipe Q2 is high level, and second switch pipe Q2 turns on,
Second end of second switch pipe Q2 exports under-voltage signal, and the first LED 1 is luminous.
When the voltage that the input of voltage indicating circuit inputs is more than U1 and is less than U2, the first switching tube Q1
Control end be high level, first switching tube Q1 conducting, second switch pipe Q2 control end current potential be pulled low,
Second switch pipe Q2 is not turned on, and the second stabilivolt ZD2 is not reaching to breakdown condition, i.e. second switch pipe Q2
Indication signal is not the most exported with the second stabilivolt ZD2.
When the voltage that the input of voltage indicating circuit inputs is more than U2, the control end of the first switching tube Q1
For high level, the first switching tube Q1 conducting, second switch pipe Q2 controls the current potential of end and is pulled low, and second opens
Closing pipe Q2 to be not turned on, the second stabilivolt ZD2 punctures conducting, the anode output overvoltage of the second stabilivolt ZD2
Signal, the second LED 2 is luminous.
Refering to Fig. 2, the light fixture that present embodiment provides, including lamp L, the drive circuit of driving lamp L work
130, trigger module 110, indicating circuit 120 and rectification filtering module 140.
The input anode of trigger module 110 is connected with the input anode of drive circuit 130, trigger module
The input cathode of 110 is connected with the input cathode of drive circuit 130.Owing to the light fixture of present embodiment makes
With alternating current, alternating current is transmitted further to trigger module 110 after inputting rectified filtration module 140 rectifying and wave-filtering,
Alternating current is directly connected to drive circuit 130.Trigger module 110 judge input voltage whether in preset range,
If input voltage is not in preset range, then exporting indication signal, indication signal includes under-voltage signal and overvoltage
Signal, indicating circuit 120 is according to the under-voltage signal of trigger module 110 or overvoltage signal designation voltage over range.
Trigger module 110 judge input voltage whether in preset range, if input voltage is not in preset range
In, then exporting indication signal, indication signal includes under-voltage signal and overvoltage signal, indicating circuit 120 basis
The under-voltage signal of trigger module 110 or overvoltage signal designation voltage over range.
Trigger module 110 include the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4,
5th resistance R5, the first switching tube Q1, second switch pipe Q2, the first stabilivolt ZD1 and the second voltage stabilizing
Pipe ZD2.One end of first resistance R1 connects the negative electrode of the first stabilivolt ZD1, another of the first resistance R1
End connects one end of the 3rd resistance R3, one end of the 4th resistance R4 and the negative electrode of the second stabilivolt ZD2.
The anode of the first stabilivolt ZD1 connects one end and the control end of the first switching tube Q1 of the second resistance R2, the
The other end of three resistance R3 connects the first end and one end of the 5th resistance R5 of the first switching tube Q1, and second
The other end of resistance R2 connects second end of the first switching tube Q1, and the other end of the 5th resistance R5 connects the
The control end of two switching tube Q2, the other end of the 4th resistance R4 connects first end of second switch pipe Q2.
Second end of second switch pipe Q2 exports under-voltage signal, the anode output overvoltage signal of the second stabilivolt ZD2.
The input anode that common node is trigger module 110 of the first resistance R1 and the 3rd resistance R3, the second electricity
The input cathode that common node is trigger module 110 of second end of resistance R2 and the first switching tube Q1.
In the present embodiment, the first switching tube Q1 is a NPN audion, the base stage of a NPN audion
It is the control end of the first switching tube Q1, the of the current collection extremely first switching tube Q1 of a NPN audion
One end, second end of the transmitting extremely first switching tube Q1 of a NPN audion.
In the present embodiment, second switch pipe Q1 is the 2nd NPN audion, the base stage of the 2nd NPN audion
For the control end of second switch pipe Q2, the of the current collection of the 2nd NPN audion extremely second switch pipe Q2
One end, second end of the transmitting of the 2nd NPN audion extremely second switch pipe Q2.
Indicating module 120 includes the first indicating circuit 121 and the second indicating circuit 122, the first indicating circuit
121 provide under-voltage instruction according to under-voltage signal, and the second indicating circuit 122 provides overvoltage instruction according to overvoltage signal.
In the present embodiment, the first indicating circuit 121 is the first LED 1, receives second switch pipe Q2
Output under-voltage signal after luminous, the second indicating circuit 122 is the second LED 2, receives the
Luminescence after the overvoltage signal of the anode output of two stabilivolt ZD2.In order to preferably distinguish under-voltage instruction and overvoltage
Indicating, the first LED 1 and the second LED 2 are arranged to send the light of different colours,
To distinguish under-voltage and overvoltage.Such as first LED 1 Yellow light-emitting low temperature, the second LED 2
Glow.
Rectification filtering module 140 includes diode D1 and electric capacity C1, and the anode of diode D1 connects driving electricity
One input on road 130, the negative electrode of diode D1 connects input anode and the electric capacity of trigger module 110
One end of C1, the other end of electric capacity C1 connects the input cathode of trigger module 110.
The operation principle of brief description light fixture:
Rectification filtering unit 140 inputs to the voltage commutation of drive circuit 130 and then inputs to trigger module
110.The breakdown voltage of the second stabilivolt ZD2 breakdown voltage than the first stabilivolt ZD1 is big, if first is steady
The breakdown voltage of pressure pipe ZD1 is U1, and the breakdown voltage of the second stabilivolt ZD2 is U2.
According to the range of nominal tension of lamp, the first stabilivolt ZD1 and the breakdown potential of the second stabilivolt ZD2 are set
Pressure, then, when the range of nominal tension of lamp L is [U1, U2], the range of nominal tension [U1, U2] is default
Scope, the breakdown voltage arranging the first stabilivolt ZD1 is U1, arranges the breakdown potential of the second stabilivolt ZD2
Pressure is U2, and once the running voltage of lamp is super goes beyond the scope, the most under-voltage or overvoltage, it indicates that circuit 120 is given
Go out under-voltage instruction or overvoltage instruction.
When the input voltage of drive circuit 130 is less than U1, i.e. the input terminal voltage of trigger module 110 is less than
During U1, the control end of the first switching tube Q1 is low level, is not turned on, and the control end of second switch pipe Q2 is
High level, second switch pipe Q2 turns on, the second end under-voltage signal of output of second switch pipe Q2, first
Optical diode LED1 is luminous.
When the input voltage of drive circuit 130 is more than U1 and is less than U2, i.e. the input of trigger module 110
When terminal voltage is more than U1 and less than U2, the control end of the first switching tube Q1 is high level, the first switching tube
Q1 turns on, and second switch pipe Q2 controls the current potential of end and is pulled low, and second switch pipe Q2 is not turned on, and second is steady
Pressure pipe ZD2 is not reaching to breakdown condition, i.e. second switch pipe Q2 and the second stabilivolt ZD2 does not the most export and refers to
Show signal.
When the input voltage of drive circuit 130 is more than U2, i.e. the input terminal voltage of trigger module 110 is more than
During U2, the control end of the first switching tube Q1 is high level, the first switching tube Q1 conducting, second switch pipe
Q2 controls the current potential of end and is pulled low, and second switch pipe Q2 is not turned on, and the second stabilivolt ZD2 punctures conducting,
The anode output overvoltage signal of the second stabilivolt ZD2, the second LED 2 is luminous.
Above-mentioned voltage indicating circuit and have the light fixture of this voltage indicating circuit, is judged defeated by trigger module
Enter whether voltage exceeds preset range, if beyond, indicate over range, it is to avoid electrical equipment works long hours
Under the under-voltage or duty of overvoltage.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed,
But therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for this area
Those of ordinary skill for, without departing from the inventive concept of the premise, it is also possible to make some deformation and
Improving, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended
Claim is as the criterion.
Claims (10)
1. a voltage indicating circuit, it is characterised in that including:
Trigger module, it is judged that whether input voltage is in preset range, if input voltage is not in preset range,
Then exporting indication signal, described indication signal includes under-voltage signal and overvoltage signal, and described trigger module includes
First resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the first switching tube, second open
Guan Guan, the first stabilivolt and the second stabilivolt, one end of described first resistance connects described first stabilivolt
Negative electrode, the other end of described first resistance connect one end of described 3rd resistance, the one of described 4th resistance
End and the negative electrode of described second stabilivolt, the anode of described first stabilivolt connects the one of described second resistance
End and the control end of the first switching tube, the other end of described 3rd resistance connects the first of described first switching tube
End and one end of the 5th resistance, the other end of described second resistance connects the second end of described first switching tube,
The other end of described 5th resistance connects the control end of described second switch pipe, the other end of described 4th resistance
Connecting the first end of described second switch pipe, the second end of described second switch pipe exports under-voltage signal, described
The anode output overvoltage signal of the second stabilivolt, described first resistance with the common node of described 3rd resistance is
The input anode of described trigger module, described second resistance is public with the second end of described first switching tube
Node is the input cathode of described trigger module；
Indicating circuit, according to under-voltage signal or the overvoltage signal of described trigger module, instructed voltage over range；
The breakdown voltage of described second stabilivolt is bigger than the breakdown voltage of described first stabilivolt；Described input voltage is little
When the breakdown voltage of the first stabilivolt, described indicating circuit provides under-voltage instruction；Described input voltage is more than
During the breakdown voltage of the second stabilivolt, indicating circuit provides overvoltage instruction.
Voltage indicating circuit the most according to claim 1, it is characterised in that described indicating circuit includes
First indicating circuit and the second indicating circuit, described first indicating circuit is given under-voltage according to described under-voltage signal
Instruction, described second indicating circuit provides overvoltage instruction according to described overvoltage signal.
Voltage indicating circuit the most according to claim 2, it is characterised in that described first indicating circuit
Being the first light emitting diode, luminous after receiving described under-voltage signal, described second indicating circuit is the second luminescence
Diode, luminous after receiving described overvoltage signal.
Voltage indicating circuit the most according to claim 1, it is characterised in that described first switching tube is
Oneth NPN audion, the control end that base stage is the first switching tube of a described NPN audion, described
First end of current collection extremely first switching tube of the oneth NPN audion, sending out of a described NPN audion
Emitter-base bandgap grading is the second end of the first switching tube.
Voltage indicating circuit the most according to claim 1, it is characterised in that described second switch pipe is
2nd NPN audion, the control end that base stage is second switch pipe of described 2nd NPN audion, described
First end of the current collection of the 2nd NPN audion extremely second switch pipe, sending out of described 2nd NPN audion
Emitter-base bandgap grading is the second end of second switch pipe.
6. a light fixture, it is characterised in that include lamp, drive lamp work drive circuit, trigger module with
And indicating circuit；
The input anode of described trigger module is connected with the input anode of described drive circuit, described triggering
The input cathode of module is connected with the input cathode of described drive circuit, and described trigger module judges input
Whether voltage is in preset range, if input voltage is not in preset range, then exports indication signal, described
Indication signal includes under-voltage signal and overvoltage signal, described trigger module include the first resistance, the second resistance,
3rd resistance, the 4th resistance, the 5th resistance, the first switching tube, second switch pipe, the first stabilivolt and
Second stabilivolt, one end of described first resistance connects the negative electrode of described first stabilivolt, described first resistance
The other end connect one end of described 3rd resistance, one end of described 4th resistance and described second stabilivolt
Negative electrode, the anode of described first stabilivolt connects one end and the control of the first switching tube of described second resistance
End, the other end of described 3rd resistance connects the first end and one end of the 5th resistance of described first switching tube,
The other end of described second resistance connects the second end of described first switching tube, the other end of described 5th resistance
Connecting the control end of described second switch pipe, the other end of described 4th resistance connects described second switch pipe
First end, the second end of described second switch pipe exports under-voltage signal, the anode output of described second stabilivolt
The input that common node is described trigger module of overvoltage signal, described first resistance and described 3rd resistance
Positive pole, described second resistance is described trigger module with the common node of the second end of described first switching tube
Input cathode；
Indicating circuit, according to under-voltage signal or the overvoltage signal of described trigger module, instructed voltage over range；
The breakdown voltage of described second stabilivolt is bigger than the breakdown voltage of described first stabilivolt；Described input voltage is little
When the breakdown voltage of the first stabilivolt, described indicating circuit provides under-voltage instruction；Described input voltage is more than
During the breakdown voltage of the second stabilivolt, indicating circuit provides overvoltage instruction.
Light fixture the most according to claim 6, it is characterised in that described indicating circuit includes the first instruction
Circuit and the second indicating circuit, described first indicating circuit provides under-voltage instruction, institute according to described under-voltage signal
State the second indicating circuit and provide overvoltage instruction according to described overvoltage signal.
Light fixture the most according to claim 7, it is characterised in that described first indicating circuit is first
Optical diode, luminous after receiving described under-voltage signal, described second indicating circuit is the second light emitting diode,
Receive luminescence after described overvoltage signal.
Light fixture the most according to claim 6, it is characterised in that described first switching tube is a NPN
Audion, the control end that base stage is the first switching tube of a described NPN audion, a described NPN
First end of the current collection of audion the extremely first switching tube, the transmitting extremely first of a described NPN audion
Second end of switching tube.
Light fixture the most according to claim 6, it is characterised in that described second switch pipe is the 2nd NPN
Audion, the control end that base stage is second switch pipe of described 2nd NPN audion, described 2nd NPN
First end of the current collection of audion extremely second switch pipe, the transmitting extremely second of described 2nd NPN audion
Second end of switching tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210146963.3A CN103389406B (en) | 2012-05-11 | 2012-05-11 | Voltage indicating circuit and light fixture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210146963.3A CN103389406B (en) | 2012-05-11 | 2012-05-11 | Voltage indicating circuit and light fixture |
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| CN103389406A CN103389406A (en) | 2013-11-13 |
| CN103389406B true CN103389406B (en) | 2016-11-02 |
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| CN201210146963.3A Active CN103389406B (en) | 2012-05-11 | 2012-05-11 | Voltage indicating circuit and light fixture |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105226604B (en) * | 2015-09-30 | 2018-03-16 | 深圳创维数字技术有限公司 | A kind of under-voltage/over-voltage protection circuit and set top box |
| CN106208963B (en) * | 2016-08-30 | 2018-11-09 | 中国华能集团清洁能源技术研究院有限公司 | photovoltaic module fault monitoring method and device |
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| JPS5946862A (en) * | 1982-09-10 | 1984-03-16 | Hitachi Ltd | Undervoltage detection circuit |
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| TW201109681A (en) * | 2009-09-09 | 2011-03-16 | Hon Hai Prec Ind Co Ltd | Voltage detecting circuit |
| TWM385299U (en) * | 2009-12-04 | 2010-08-01 | Wern-Dare Jehng | High-temperature-resistant antibacterial eco-friendly chopsticks set produced by metal powder injection technology |
| CN101752827A (en) * | 2009-12-31 | 2010-06-23 | 海洋王照明科技股份有限公司 | Overvoltage, under-voltage and hysteresis protection circuit of input voltage |
| CN201830504U (en) * | 2010-08-24 | 2011-05-11 | 东莞市前锋电子有限公司 | Light emitting diode (LED) illumination power supply over-voltage or under-voltage protection circuit |
| CN202049190U (en) * | 2011-04-22 | 2011-11-23 | 日隆电子股份有限公司 | Input voltage detecting circuit for power supply unit |
| CN202049191U (en) * | 2011-04-28 | 2011-11-23 | 海洋王照明科技股份有限公司 | Overvoltage undervoltage detection circuit |
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| CN103389406A (en) | 2013-11-13 |
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