CN2203519Y - High-tension ballast for neon light - Google Patents

Abstract

The utility model discloses a high-tension ballast for neon lights, which is characterized in that the input ends of two positive and negative half wave voltage doubling rectification circuits composed of diodes and capacitors of equal numbers are connected in parallel; the output ends are respectively connected in series after connected in parallel with a drain resistor. Starting electrodes mutually connected with the electrodes of the other end are respectively arranged on the outer wall of both ends of a discharge light tube corresponding to two-electrode portions. The utility model has the characteristic that the high-tension ballast can output high power voltage and larger current; the high-tension ballast has smaller voltage ripple coefficient, no flicker of the light tube, rapid and convenient high impedance electric discharge light start, stable operation, good use effect, higher performance and price ratio, etc. The utility model is especially suitable for being used as the high-tension ballast of neon lights and cold cathode fluorescent lights.

Description

High-tension ballast for neon light

The utility model relates to a kind of circuit arrangement that is used for discharge lamp igniting or control, especially a kind of neon light high pressure ballast.

At present, neon light still is widely used as a kind of carrier of advertising.Neon light belongs to negative resistance electrical equipment, and it need apply than the voltage of high several times of operating voltage in initial start stage and just can start working, and promptly the difference of its starting resistor and operating voltage is bigger.What generally use now is the voltage-doubler rectifier that forms with some grades of diodes and capacitor bank, and it is a kind of half-wave voltage doubler, utilizes discharging and recharging of capacitors at different levels that voltage is increased and acquisition high power voltage.This voltage doubling rectifing circuit also increases step by step with its capacity that increases of capacitor progression, causes internal resistance to increase, and output current significantly reduces, thereby the bigger cold-cathode discharge lamp effect of starting load is not good enough.In addition, because it is half-wave shape and discharges and recharges, the ripple coefficient of output voltage is bigger, can make fluorescent tube produce scintillation, so its result of use is undesirable, range of application is restricted.

The purpose of this utility model just is to overcome above-mentioned the deficiencies in the prior art part, a kind of high power voltage and the output of big electric current are provided, ripple coefficient of voltage is little, fluorescent tube flicker free and the cold-cathode discharge lamp that starts high impedance rapidly, facility and working stability, respond well, neon light high pressure ballast that the ratio of performance to price is higher.

The purpose of this utility model can reach by implementing following technical proposal: two inputs by equivalent amount diode and positive and negative half-wave voltage doubler that capacitor constitutes are parallel with one another, and be connected with two electrodes of cold-cathode discharge lamp by a steady resistance as the full-wave voltage doubler output that is constituted and with it with series system again behind the output bleeder resistance in parallel respectively separately at it.If connecting one respectively at two electrode places is arranged near the starting electrode on the outer wall other end counter electrode, then can obtain better result of use.

Accompanying drawing is the electrical connection schematic diagram of the utility model embodiment.

The utility model is described in further detail below in conjunction with embodiment and accompanying drawing: with two respectively by four capacitor C ₁～C ₄, C ₁'～C ₄' and diode D ₁～D ₄, D ₁'～D ₄' to form the input of positive and negative half-wave voltage doubler parallel with one another, and at its output bleeder resistance R in parallel respectively separately ₁And R ₁' after connect with series system again, as the output of institute's formation full-wave voltage doubler.At steady resistance R of serial connection ₂After, it is connected on the two end electrodes 1 and 2 of neon light tube L.Draw the starting electrode 3 and 4 that is the garden annular respectively from electrode 1 and 2, and they are separately positioned near corresponding electric grade 2 and 1 glass outer wall of the other end.Each utmost point corresponding elements parameter is identical in two positive and negative half-wave rectifying circuits, and capacitor volume is benchmark with the output terminal capacitor then, and exponent function relation increases progressively with the increase of progression.When using the utility model ballast to be connected with the electrode 1,2 of neon light tube L, electric main is imported respectively in the positive and negative half-wave rectifying circuit, it is is alternately discharged and recharged and produce 8 times of voltages to export and start neon light tube L.The all-wave high power voltage of being exported applies electric field to electrode 2 corresponding with it and 1 respectively by starting electrode 3 and 4 neon light tube L is lighted, and makes it continual and steady work.When electric main was closed, the high power voltage that is produced was by bleeder resistance R ₁And R ₁Released gradually in the ' loop that constituted to guarantee safety.

The utility model has high power voltage and High-current output compared with prior art, ripple coefficient of voltage is little, the cold-cathode discharge lamp that fluorescent tube flicker free and startup high resistant do is rapid, facility and working stability, respond well, performance and price is high relatively, especially is fit to be applied on neon light and the cold cathode daylight lamp. As design one and be input as 220 volts of civil powers, output open circuit voltage is 3.6 kilovolts, operating current is 5 milliamperes voltage-doubler ballast, and to drive a length with it be that 3 meters, diameter are 10 millimeters argon mercury mixing fluorescent tube, if adopt the common half-wave voltage-doubler rectifier need be with 12 times voltage-multiplying circuit, its primary capacitance device capacity is 250 microfarads, and the fluorescent tube flicker is frequent, job insecurity; Adopt the utility model ballast then only to need 2 * 6 times meter ripple voltage-multiplying circuit, its primary capacitance device capacity also only needs 12 microfarads just much of that, and its each value of series successively decreases with exponential relationship step by step. Its job stability and lamp luminescence performance etc. all are better than the former, and power factor (PF) also is significantly increased. Particularly the utility model ballast can be designed to the series of products of 4～20 multiplication of voltages, and more outstanding with its superiority of increase of voltage multiple.

Claims (2)

1, a kind of neon light high pressure ballast comprises shell, wiring board and voltage doubling rectifing circuit, it is characterized in that voltage doubling rectifing circuit is to contain equivalent amount diode (D by two ₁～D ₄, D ₁'～D ₄') and capacitor (C ₁～C ₄, C ₁'～C ₄') form the input parallel connection of positive and negative half-wave voltage doubler, it is output bleeder resistance (R in parallel respectively separately ₁, R ₁') back series connection output and constituting.

2, neon light high pressure ballast according to claim 1 is connected with one respectively and is arranged near starting electrode (3), (4) on the outer wall other end counter electrode on the electrode for discharge lamp (1) that it is characterized in that being connected with the voltage doubling rectifing circuit output, (2).

Images