CN202218469U - Self-starting control circuit for gas discharge lamp tube - Google Patents
Self-starting control circuit for gas discharge lamp tube Download PDFInfo
- Publication number
- CN202218469U CN202218469U CN2011201550161U CN201120155016U CN202218469U CN 202218469 U CN202218469 U CN 202218469U CN 2011201550161 U CN2011201550161 U CN 2011201550161U CN 201120155016 U CN201120155016 U CN 201120155016U CN 202218469 U CN202218469 U CN 202218469U
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- Prior art keywords
- resistance
- circuit
- fluorescent tube
- discharge lamp
- filament
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model discloses a self-starting control circuit for a gas discharge lamp tube, provided with a bridge circuit formed by four resistor arms, wherein one resistor arm is serially connected with the filament of a lamp tube, the sum of the resistance of the resistor Rs of the filament of a normal lamp tube and the resistance of one resistor R4 is equal to the resistance of other three resistor arms, one node of the bridge circuit is connected with a DC power supply through a resistor, the corresponding node of the node is grounded, an optical coupling circuit is connected between other two nodes of the bridge circuit, and the optical coupling circuit outputs a sampling signal to control a ballast inverter circuit. The self-starting control circuit for a gas discharge lamp tube has the advantages of being low in power consumption and high in sensitivity, and is provided with a function of rectification state end of life protection for the lamp tube.
Description
Technical field
The utility model relates to a kind illumination and uses electronic amperite of gas-discharge lamp, particularly a kind of control circuit of fluorescent tube self-starting.
Background technology
Electric ballast gas driving discharge lamp is under the situation of ballast power switch connection; If as pin loose contact, filament break off, lamp tube service life ends and failure condition such as can not activate the time, its built-in protective circuit generally all can make the inverter circuit of ballast quit work and avoid damaging ballast; When the eliminating of fluorescent tube fault, when normal fluorescent tube inserts ballast, then according to user's demand, two kinds of possibilities are arranged: a kind of is elder generation to turn-off ballast power, and energized just can be lighted fluorescent tube again; Another kind is under the condition of ballast power switch connection, as long as the fluorescent tube fault is excluded, promptly inserts the normal fluorescent tube that is suitable for again, and fluorescent tube just can be activated and light.For the picture megastore, workshop etc. are controlled the occasion of numerous fluorescent tubes by a mains switch especially, and the characteristic that the latter is referred to as the fluorescent tube self-starting in the electric ballast can seem very necessary.The fluorescent tube self-starting function has been arranged, can know immediately whether the fluorescent tube fault is got rid of through the Switching power switch.
For a long time, generally adopt a kind of filament with fluorescent tube as switch, promptly filament loop " leading to " or " breaking " way of extracting the fluorescent tube fault message realizes the self-starting of fluorescent tube.Under the fault condition that filament loop breaks off, produce a sampled signal, control ballast inverter circuit quits work; When connecting in the tube filament loop, the ballast inverter circuit no longer receives the control of fault sampled signal and recovers operate as normal, thereby fluorescent tube is lighted.Adopt the ballast of this kind fluorescent tube self-starting, intact at tube filament, under the situation about lighting, ballast must have other no-load protection measure, thereby has increased cost because other faults can not be activated.
The utility model content
The utility model technical problem to be solved is to provide a kind of after the condition of fixing a breakdown, and need not cut off and energized once more, can light the gaseous discharge lamp fluorescent tube self-starting control circuit that inserts normal fluorescent tube automatically.
In order to solve above technical problem; The utility model provides a kind of gaseous discharge lamp fluorescent tube self-starting control circuit; A bridge circuit that is made up of four resistive arms is set; The filament of one of them resistive arm serial connection fluorescent tube makes normal tube filament resistance R s add another resistance R 4 resistance sums of this resistive arm, equates with the resistance of other three resistive arms; A node at bridge circuit is connected with DC power supply through a resistance; The corresponding node ground connection of this node; Between other two nodes of bridge circuit, connect an optically coupled circuit, optically coupled circuit is output sampled signal control ballast inverter circuit when the generation of filament resistance tissue is unusual.
Said optically coupled circuit also is connected to anti-tampering capacitor C and protection diode D.
The negative pole of light-emitting diode Dg in the said optocoupler circuit is connected with the positive pole of protection diode D, prevents that too high reverse voltage from appearring in light-emitting diode Dg two ends.
The operation principle of the utility model: under the normal condition, electric bridge is a balance, and being connected among the light-emitting diode Dg of two optocoupler circuits between the bridge arm does not have direct current to flow through, and photoelectrical coupler is not exported signal.When tube filament resistance increases to a certain degree, the original balance of electric bridge is broken, and the electric current that flows through among the photoelectrical coupler light-emitting diode Dg makes photoelectrical coupler output sampled signal, and the ballast inverter is quit work.When the fluorescent tube fault was got rid of, filament resistance recovered normal value, the electric bridge state that restores balance, and the ballast inverter circuit no longer includes from the fluorescent tube failure control signal of photoelectrical coupler and recovers operate as normal, and fluorescent tube is also just lighted automatically.
The superior effect of the utility model is:
(1) low-power consumption: power consumption is merely a microampere magnitude;
(2) high sensitivity: change less than 8%～10% o'clock at filament resistance, control circuit can start;
(3) with rectification attitude defencive function to lamp tube life end.
Description of drawings
Fig. 1 is the circuit diagram of the utility model.
Embodiment
See also shown in the accompanying drawing, the utility model is done further to describe.
As shown in Figure 1; The utility model provides a kind of gaseous discharge lamp fluorescent tube self-starting control circuit; A bridge circuit that is made up of four resistive arms is set, and resistance R 1, R2, R3 constitute three independently bridge arms, and resistive arm R4 connects the filament of fluorescent tube; Make normal tube filament resistance R s add another resistance R 4 resistance sums of this resistive arm, equate with the resistance of other three resistive arms.
One end of electric bridge is that the connected node P of resistance R 1 and tube filament Rs receives dc power supply+DC through resistance R 0; The other end of electric bridge is the connected node G earthing potential of resistance R 2 and R3.The mid point of bridge arm is the light-emitting diode Dg that is connected in parallel to capacitor C, protection diode D and photoelectrical coupler U between the connected node B of connected node A and resistance R 3 and resistance R 4 of resistance R 1 and resistance R 2.The negative pole of protection diode D and the positive pole of light-emitting diode Dg connect the A point; The negative pole of the positive pole of diode D and light-emitting diode Dg connects the B point.
Under normal circumstances; Said tube filament resistance R s equates with other three resistance R 1, R2, R3 resistance value separately with the resistance value sum of said resistance R 4; Electric bridge is poised state; Do not have current flowing among the light-emitting diode Dg of photoelectrical coupler U, photoelectrical coupler does not have sampled signal output.In case the value of filament resistance Rs increases; Surpassing a certain numerical value is infinitely great when filament breaks off; The original balance of electric bridge is broken, and the electric current that flows through among the light-emitting diode Dg of photoelectrical coupler U makes photoelectrical coupler output sampled signal, and the ballast inverter is quit work.
When the fluorescent tube fault was got rid of, filament resistance Rs recovered normal value, the electric bridge state that restores balance, and the ballast inverter circuit no longer includes from the fluorescent tube failure control signal of photoelectrical coupler U and recovers operate as normal, and the normal fluorescent tube of access is also just lighted automatically.
In order to eliminate the interference that possibly occur, between the A of electric bridge point and B point, i.e. the two ends shunt capacitor C of the light-emitting diode Dg of photoelectrical coupler U.
Between the A of electric bridge point and B point, be connected with protection diode D with the light-emitting diode Dg pole reversal of photoelectrical coupler U, prevent to occur too high reverse voltage at light-emitting diode Dg two ends.
Claims (3)
1. gaseous discharge lamp fluorescent tube self-starting control circuit; It is characterized in that: a bridge circuit that is made up of four resistive arms is set; The filament of one of them resistive arm serial connection fluorescent tube; Make normal tube filament resistance R s add another resistance R 4 resistance sums of this resistive arm, equate with the resistance of other three resistive arms; A node at bridge circuit is connected with DC power supply through a resistance; The corresponding node ground connection of this node; Between other two nodes of bridge circuit, connect an optically coupled circuit, optically coupled circuit is output sampled signal control ballast inverter circuit when the generation of filament resistance tissue is unusual.
2. gaseous discharge lamp fluorescent tube self-starting control circuit according to claim 1 is characterized in that: said optically coupled circuit also is connected to anti-tampering capacitor C and protection diode D.
3. gaseous discharge lamp fluorescent tube self-starting control circuit according to claim 2 is characterized in that: the negative pole of the light-emitting diode Dg in the said optocoupler circuit is connected with the positive pole of protection diode D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201550161U CN202218469U (en) | 2011-05-16 | 2011-05-16 | Self-starting control circuit for gas discharge lamp tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201550161U CN202218469U (en) | 2011-05-16 | 2011-05-16 | Self-starting control circuit for gas discharge lamp tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202218469U true CN202218469U (en) | 2012-05-09 |
Family
ID=46017690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201550161U Expired - Lifetime CN202218469U (en) | 2011-05-16 | 2011-05-16 | Self-starting control circuit for gas discharge lamp tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202218469U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102281693A (en) * | 2011-05-16 | 2011-12-14 | 上海阿卡得电子有限公司 | Auto-start control circuit of gas discharge lamp tube |
-
2011
- 2011-05-16 CN CN2011201550161U patent/CN202218469U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102281693A (en) * | 2011-05-16 | 2011-12-14 | 上海阿卡得电子有限公司 | Auto-start control circuit of gas discharge lamp tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120509 |