CN204335101U - A lighting protection circuit - Google Patents

Abstract

The utility model discloses a kind of light fixture and open protective circuit; comprise voltage controlled oscillator drive circuit and be connected with described voltage controlled oscillator drive circuit and be connected to the both end voltage Acquisition Circuit of light fixture; wherein, described voltage controlled oscillator drive circuit comprises the moment cut-in voltage Acquisition Circuit and voltage controlled oscillator driver element be connected with light fixture moment cut-in voltage output signal end.The beneficial effects of the utility model: by being provided with voltage controlled oscillator drive circuit in circuit, thus light fixture cut-in voltage is changed more relax, and then reach and effectively improve light fixture useful life, make it have more economy.

Description

A lighting protection circuit

technical field

The utility model relates to the technical field of lamp lighting, in particular to a lamp opening protection circuit.

Background technique

There is a huge difference between the turn-on voltage and the working voltage of the lamp when it is used for lighting. When the lamp starts to ignite, a high voltage is required, and when it is normally lit, the lamp only allows a small current, so the voltage at both ends of the lamp is lower than the power supply voltage. When the power is turned on, because the two metal sheets in the neon bulb of the starter are not connected, the power supply breaks down and the neon gas conducts electricity, so that the neon bulb glows. When the neon gas conducts electricity, heat is generated, causing the bimetallic strips in the neon bulb to bend after being heated. The degree is reduced, and the two electrodes are connected at the same time, and a larger current is passed. When the high voltage required for starting the fluorescent lamp is reached, because the neon gas in the neon bulb no longer conducts light after the bimetallic strip is connected, the temperature drops rapidly, the bimetallic strip returns to its original state, and the power supply is quickly cut off. At this time, the high voltage of the lamp tube is turned on The voltage disappears quickly. This opening method has a serious impact on the service life of the lamp, making its service life greatly reduced.

Aiming at the problems described in the above-mentioned related technologies, no effective solution has been proposed yet.

Utility model content

Aiming at the above-mentioned problems in the related art, the utility model proposes a lamp opening protection circuit, which can effectively solve the problem of excessive variation of the lamp opening voltage, thereby effectively improving the service life of the lamp.

For realizing above-mentioned technical purpose, technical scheme of the present utility model is realized like this:

A protection circuit for turning on a lamp, comprising a voltage-controlled oscillator drive circuit and a voltage acquisition circuit connected to both ends of the voltage-controlled oscillator drive circuit and connected to the lamp, wherein the voltage-controlled oscillator drive circuit includes a Instantly turn on the lamps connected to the voltage output signal end to instantly turn on the voltage acquisition circuit and the voltage-controlled oscillator drive unit, the instant on voltage acquisition circuit includes a first diode, a first resistor and a first two resistors connected in parallel with each other. A first capacitor, a second resistor, and a triode connected in series with the transistor and the first resistor, the emitter of the triode is connected with a third resistor, and the voltage-controlled oscillator drive unit includes a voltage-controlled oscillator and a voltage-controlled oscillator. The fourth resistor and the second capacitor connected in series with the controlled oscillator and the fifth resistor and the sixth resistor connected in parallel, the fifth resistor and the sixth resistor are also connected in series with the third resistor, the voltage at both ends The acquisition circuit includes a Zener diode connected to the second resistor and a third capacitor connected in parallel with the Zener diode, a second diode and a seventh resistor, the third capacitor and the first An eighth resistor is also connected between the two diodes, and the voltage-controlled oscillator drive circuit is also connected to an external power supply, and the two-terminal voltage collection circuit is also connected to a two-terminal voltage collection terminal.

Further, the base of the triode is connected to the first resistor, the emitter of the triode is connected to the third resistor, and the collector of the triode is connected to the first capacitor.

Further, the anode of the first diode is connected to the first capacitor, and the cathode of the first diode is connected to the first resistor.

Further, the anode of the Zener diode is connected to the second capacitor, and the cathode of the Zener diode is connected to the second resistor.

Further, the anode of the second diode is connected to the seventh resistor, and the cathode of the second diode is connected to the second capacitor.

The beneficial effects of the utility model: the circuit is provided with a voltage-controlled oscillator driving circuit, so that the change of the lamp opening voltage is more moderate, thereby effectively improving the service life of the lamp and making it more economical.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the present invention. For some embodiments of the present invention, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic circuit diagram of a lighting protection circuit according to an embodiment of the present invention.

In the picture:

1. Voltage-controlled oscillator drive circuit; 2. Voltage acquisition circuit at both ends; 3. Instantly turn on voltage acquisition circuit; 4. Voltage-controlled oscillator drive unit; 5. First diode; 6. First resistor; 7. The first capacitor; 8, the second resistor; 9, the triode; 10, the third resistor; 11, the voltage-controlled oscillator; 12, the fourth resistor; 13, the second capacitor; 14, the fifth resistor; 15, the sixth resistor 16. Zener diode; 17. Third capacitor; 18. Second diode; 19. Seventh resistor; 20. Eighth resistor; 21. External power supply.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

As shown in Figure 1, a lighting protection circuit according to an embodiment of the present invention includes a voltage-controlled oscillator drive circuit 1 and is connected to the voltage-controlled oscillator drive circuit 1 and connected to both ends of the lamp. A voltage acquisition circuit 2, wherein the voltage-controlled oscillator drive circuit 1 includes an instant-on voltage acquisition circuit 3 and a voltage-controlled oscillator drive unit 4 connected to the output signal terminal of the instant-on voltage of the lamp, and the instant-on voltage acquisition circuit 3 includes a first diode 5 connected in parallel, a first resistor 6 and a first capacitor 7 connected in series with the first diode 5 and the first resistor 6, a second resistor 8 and a triode 9, the The emitter of the triode 9 is connected with a third resistor 10, and the voltage-controlled oscillator drive unit 4 includes a voltage-controlled oscillator 11, a fourth resistor 12 connected in series with the voltage-controlled oscillator 11, a second capacitor 13 and a phase The fifth resistance 14 and the sixth resistance 15 connected in parallel, the fifth resistance 14 and the sixth resistance 15 are also connected in series with the third resistance 10, and the voltage acquisition circuit 2 at both ends includes a connection with the second resistance 8 connected Zener diodes 16 and the third capacitor 17 connected in parallel with the Zener diode 16, the second diode 18 and the seventh resistor 19, the third capacitor 17 and the second two An eighth resistor 20 is also connected between the pole tubes 16, and the voltage-controlled oscillator driving circuit 1 is also connected to an external power supply 21, and the two-terminal voltage acquisition circuit 2 is also connected to a two-terminal voltage acquisition terminal.

In addition, in a specific embodiment, the base of the triode 9 is connected to the first resistor 6, the emitter of the triode 9 is connected to the third resistor 10, and the collector of the triode 9 Connected to the first capacitor 7.

In addition, in a specific embodiment, the anode of the first diode 5 is connected to the first capacitor 7 , and the cathode of the first diode 5 is connected to the first resistor 6 .

In addition, in a specific embodiment, the anode of the Zener diode 16 is connected to the second capacitor 13 , and the cathode of the Zener diode 16 is connected to the second resistor 8 .

In addition, in a specific embodiment, the anode of the second diode 18 is connected to the seventh resistor 19 , and the cathode of the second diode 18 is connected to the second capacitor 13 .

In order to facilitate the understanding of the above-mentioned technical solution of the present utility model, the above-mentioned technical solution of the present utility model will be described in detail below through specific usage modes.

In specific use, connect the instant-on voltage acquisition circuit to the instant-on voltage output signal terminal, connect the voltage acquisition circuit at both ends to the voltage acquisition end at both ends, and then connect the voltage-controlled oscillator drive circuit to an external power supply to make the entire circuit normal. Work, so that the turn-on voltage of the lamp disappears after a while, thus protecting the lamp from being affected by sudden voltage changes and reducing the service life.

To sum up, with the help of the above-mentioned technical solution of the utility model, by setting a voltage-controlled oscillator drive circuit in the circuit, the change of the lamp opening voltage is more moderate, thereby effectively improving the service life of the lamp and making it more efficient. economy.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (5)

1. protective circuit opened by a light fixture, it is characterized in that, comprise voltage controlled oscillator drive circuit (1) and be connected with described voltage controlled oscillator drive circuit (1) and be connected to the both end voltage Acquisition Circuit (2) of light fixture, wherein, described voltage controlled oscillator drive circuit (1) comprises moment cut-in voltage Acquisition Circuit (3) and voltage controlled oscillator driver element (4) that are connected with light fixture moment cut-in voltage output signal end, described moment cut-in voltage Acquisition Circuit (3) comprises the first diode (5) parallel with one another, first resistance (6) and first electric capacity (7) of connecting with described first diode (5) and described first resistance (6), second resistance (8) and triode (9), the emitter of described triode (9) is connected with the 3rd resistance (10), described voltage controlled oscillator driver element (4) comprises voltage controlled oscillator (11) and the 4th resistance (12) that is in series with described voltage controlled oscillator (11) and the second electric capacity (13) and the 5th resistance (14) be in parallel and the 6th resistance (15), described 5th resistance (14) and described 6th resistance (15) are also connected with described 3rd resistance (10), described both end voltage Acquisition Circuit (2) comprises the voltage stabilizing didoe (16) be connected with described second resistance (8) and the 3rd electric capacity (17) be in parallel be connected with described voltage stabilizing didoe (16), second diode (18) and the 7th resistance (19), the 8th resistance (20) is also connected with between described 3rd electric capacity (17) and described second diode (16), and, described voltage controlled oscillator drive circuit (1) is also connected with external power supply (21), described both end voltage Acquisition Circuit (2) is also connected with both end voltage collection terminal.

2. protective circuit opened by light fixture according to claim 1; it is characterized in that; the base stage of described triode (9) is connected with described first resistance (6); the emitter of described triode (9) is connected with described 3rd resistance (10), and the collector electrode of described triode (9) is connected with described first electric capacity (7).

3. protective circuit opened by light fixture according to claim 1, and it is characterized in that, the positive pole of described first diode (5) is connected with described first electric capacity (7), and described first diode (5) negative pole is connected with described first resistance (6).

4. protective circuit opened by light fixture according to claim 1, and it is characterized in that, the positive pole of described voltage stabilizing didoe (16) is connected with described second electric capacity (13), and described voltage stabilizing didoe (16) negative pole is connected with described second resistance (8).

5. protective circuit opened by light fixture according to claim 1, and it is characterized in that, the positive pole of described second diode (18) is connected with described 7th resistance (19), and described second diode (18) negative pole is connected with described second electric capacity (13).