CN2454900Y

CN2454900Y - Strobe-free dc. fluorescent lamp

Info

Publication number: CN2454900Y
Application number: CN00263408U
Authority: CN
Inventors: 高杰; 唐筱花; 金玉泉
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-21
Filing date: 2000-12-21
Publication date: 2001-10-17
Anticipated expiration: 2010-12-21

Abstract

The utility model relates to an improvement of the existing DC fluorescent lamp technology. A straight tube DC fluorescent lamp with double layer vacuum structure, and a DC electronic ballast matched with the straight tube DC fluorescent lamp are used to cause the DC fluorescent lamp not only to have no flash but also not to generate the common anode dark space phenomenon of lamp tubes. Consequently, the service life of the lamp tubes is prolonged.

Description

A kind of DC fluorescent lamp without stroboflash

The utility model relates to a kind of lighting, particularly relates to a kind of DC fluorescent lamp of not having stroboscopic.

Existing fluorescent lamp is mainly by the conventional fluorescent lamps and the high-frequency electronic ballast fluorescent lamp of inductance or inductance, capacitances in series.The former has stroboscopic because power factor is low, is difficult to starter under low temperature, low-voltage; Though and the latter has eliminated stroboscopic basically, electromagenetic wave radiation interference effect people's health has also been polluted environment.

The appearance of DC fluorescent lamp has in recent years been eliminated stroboscopic and electromagenetic wave radiation and has been disturbed, and can protect human eyesight and brain, for green light source has been opened up broad future.But also just on the desk lamp of power, use judging from the current situation, less than 25W.For the DC fluorescent lamp pipe of high-power (more than the 25W), in use can produce serious fluorescent tube dark space, influence brightness, problems such as starter difficulty overcome above-mentioned technical deficiency, are the purpose of this utility model places.

The utility model is to have done corresponding improvement in the design of the DC fluorescent lamp pipe and supporting with it electric ballast, has eliminated problems such as dark space and low-voltage starter difficulty basically, makes it to become practical 40W and above DC fluorescent lamp without stroboflash thereof.

The technical solution of the utility model is to implement like this: specialized designs a kind of long pipe type DC fluorescent lamp pipe that big direct current pressure drop (120V-150V) is arranged, specialized designs be the corresponding supporting dc electronic ballast of above-mentioned fluorescent tube.

The utility model is mainly by DC fluorescent lamp pipe 3, suitable with it dc electronic ballast 2 and lamp bracket 1 three parts are formed: DC fluorescent lamp pipe 3 is cylindrical long tubes of pair of lamina sealing, scribble fluorescent material on interior pipe 36 inwalls, fill a certain amount of argon gas after vacuumizing in the pipe, filament 34 is connected by lead-in wire with outer tube stem stem 32 by interior tube core post 33, and be connected on the lamp base 31 of outer tube 37, outer tube 37 is sealed glass tubes, vacuumize in the pipe, the air of pipe 36 and outside is isolated in making, in order to insulation, between outer tube 37 and the interior pipe 36 by support 35 relative fixed.

Suitable with it dc electronic ballast is made up of direct current current-limiting power supply, starting circuit and smoothed filter circuit.The direct current current-limiting power supply is to be formed through big capacitor filtering by capacitance decompression current-limiting circuit and bridge rectifier series connection again, specifically by capacitor C 1, C2, resistance R 1, R2, diode VD1-VD4 forms, its input is the 220V alternating current, and output is the direct current of smoother certain voltage and current.It is to produce the above high pressure of the required 600V of fluorescent tube starter and to the cathode fluorescent tube filament pre-heating that starting circuit mainly acts on.Starting circuit is by capacitor C 3, C5, resistance R 3, R4, the transformer coupled oscillating circuit that diode VD5, triode VT1 and high frequency transformer are formed.The required above high pressure of 600V of starter is by the high frequency transformer generation of boosting.The cathode filament preheating then is in series with cathode filament by high frequency transformer is secondary.The preheating as long as vibration one generation, filament are just switched on.Simultaneously, high pressure also is added to the fluorescent tube anode.So fluorescent tube is with regard to starter.In case the fluorescent tube starter, because load increases the weight of, vibration stops voluntarily, and direct current is added to the fluorescent tube anode by high frequency transformer is elementary with the winding that boosts.Smoothed filter circuit is by capacitor C 4, C6, resistance R 5, R6, R7, the active electronic filter circuit that diode VD6, triode VT2 form.Smoothed filter circuit and fluorescent tube series connection, thus guarantee that fluorescent tube does not have stroboscopic.Usually this circuit is to be connected in the fluorescent tube anode circuit, considers the anode voltage height, and to components and parts requirement of withstand voltage height, volume, cost are corresponding also big.For being connected on the cathode circuit behind this circuit modification, its performance, effect also can reach designing requirement.

Lamp bracket 1 can be made different shape, with fixedly DC fluorescent lamp pipe and dc electronic ballast, forms a complete light fixture.

Advantage of the present utility model has been to eliminate the stroboscopic phenomenon of general fluorescent lamp, no Electromagnetic Interference, and startability is good, and can not produce the anode dark space of fluorescent tube, has prolonged the useful life of fluorescent tube.

Provide embodiment of the present utility model below in conjunction with accompanying drawing:

Fig. 1 structural representation of the present utility model;

The structure chart of Fig. 2 the utility model double-layer seal DC fluorescent lamp pipe;

The circuit diagram of the dc electronic ballast of Fig. 3 the utility model embodiment;

Embodiment:

The lamp bracket that aluminum material is made, the double-layer seal DC fluorescent lamp pipe of 40W, 15 millimeters of the diameters of the interior pipe 36 of this fluorescent tube (T5), 1100 millimeters of length are installed in the below; 28 millimeters of overcoat diameters (T8), length are 1200 millimeters outer tube 37, and inner and outer pipes all vacuumizes.The top of lamp bracket is installed and is pressed the dc electronic ballast that Fig. 3 circuit is formed, and the relevant parameter of its electronic component is as follows: capacitor C 1 is 9 μ F, 250V; Capacitor C 2 is 150 μ F, 400V; Capacitor C 3, C5 are 0.01 μ F, 600V; Capacitor C A is 25 μ F, 50V; Capacitor C 6 is 1000 μ F, 25V; Resistance R 1 is 220K Ω; Resistance R 2 is 330K Ω; Resistance R 3 is 200 Ω, PTC; Resistance R 4 is 100K Ω; Resistance R 5, R6 are debugging resistance; Resistance R 7 is 10 Ω, 2W; Diode VD1-VD6 is 1N4007; Triode VT1, VT2 are 13005.

Claims

1, a kind of DC fluorescent lamp without stroboflash of being made up of lamp bracket 1, dc electronic ballast 2 and DC fluorescent lamp pipe 3 is characterized in that: (1) DC fluorescent lamp pipe 3 is made up of parts such as interior pipe 36, outer tube 37, support 35, filament 34, interior tube core post 33, outer tube stem stem 32, lamp bases 31; (2) dc electronic ballast is by capacitor C 1, C2, resistance R 1, R2, the direct current current-limiting power supply that diode VD1-VD4 forms and by capacitor C 3, C5, resistance R 3, R4, the starting circuit that diode VD5, triode VT1 form and by capacitor C A, C6, resistance R 5, R6, R7, these three parts of the smoothed filter circuit that diode VD6, triode VT2 form constitute, wherein smoothed filter circuit and fluorescent tube series connection.

2, DC fluorescent lamp without stroboflash according to claim 1 is characterized in that described interior pipe 36 is to place outer tube 37 inner chambers, and by making the relatively-stationary support of two pipes 35 location.

3, DC fluorescent lamp without stroboflash according to claim 1 is characterized in that described interior pipe 36 and outer tube 37 all are the glass tubes of sealing state, and inner chamber vacuumizes respectively.

4, DC fluorescent lamp without stroboflash according to claim 1 is characterized in that scribbling fluorescent material on interior pipe 36 inner tubal walls of described DC fluorescent lamp pipe, fills a certain amount of argon gas after interior pipe vacuumizes.