THE ELECTRONIC STABILIZER FOR A FLUORESCENT LAMP

Abstract: Describes the electronic stabilizer for a fluorescent lamp including composition for providing; a starter circuit, which is connected with D.C. power source, becomes magnetic inverter and the first, second current limiter located between the magnetic inverter oscillator, the transformer; a synthetic resin coil bobbin in the central opening inside of outer case with a central groove at the cylindrical center interposed core in the central opening.

Description: DESCRIPTION THE ELECTRONIC STABLIZER FOR A FLUORSCENT LAMP BACKGROUND OF THE INVENTION This invention relates to the electronic stablizer for a fluorscent lamp, more particularly, to providing simple type for the operation of the fluorscent lamp that said electronic starter circuit connected with D.C. power source becomes the magnetic inverter-oscilater, and the first, second current limiter located between the magnetic inverter-oscilater and the fluorscent lamp. BACKGROUND - REFERENCE TO RELATED APPLICATIONS These inventions are related to the prior art of Korean Patent Ser. No. 570 (Publication No. 81-566); Korean Patent Ser. No. 611 (Publication No. 81-142) and British Patent No. 2071950; Korean Patent Ser. No. 729 (Publica¬ tion No. 82-1748) . Heretofore, in the aforementioned applications, briefly stated; these inventions are related to the elec¬ tronic starter circuit for a fluorscent lamp with: Two transisters linked in serial D.C. power source; current transformer for maintaining oscilater operation of the transister; consisting of series resonance circuit with the inducter and capaciter, or other capaciter connected with the both side of series resonance circuit and the voltage source since these prior arts are hardly expected in operating of circuit and inpracticing as followings: 1. The problems are: The inverter circuit connected with the D.C. power source is given to the capaciter which passed by the inducter as series resonance and condition of oscilating current transformer and a transister disa- greeded by high-frequency noise of the fluorscent lamp; two transisters are being "ON" situation simultaneously, the overheat of the transisters can be generated there¬ fore, this invention has to be added as the prior art, Ser. No. 611. 2. In the above circuits, the system of the trigger has been absured for initial oscilating of the inverter circuit it is hardly expect in safty for user and for circuit components, as- maintaining its oscilation conti¬ nuously even though the infection of initial discharge from oscilate the load of discharge lamp as like a fluors¬ cent lamp or demage of the fluorscent lamp therefore, this invention has to be erected as the prior art. Ser. No. 729. 3. In comprising of circuits due to complete all the condition of 1 and 2 the difficulty will follow from the increased number of circuit, complicated circuit and higher cost at manufacturing, relatively. In addition to, it ought to be prepared the better radition system to the above transister and to the inducter for generation of heat in circuit. In the electronic starter circuit of the fluorscent lamp comprising the capaciter, for a design of circuit characteristics for the induce load and the high-f equency circuit depend upon the characteristic of circuit and the change of input, is not easy to design, for this reason, it was cause of geneation of heat and reduction of reliance for circuit itself. There was the problem of confidence and effectiveness as there is nothing better solution even though it has to be unchanged conditions in high frequency intervening bet¬ ween the inverter circuit and the induce load. And there is defects of noise by the circuit characteristic of a induce load and of a high frequency. Object of the invention is to provide the inexpensive and simple electronic stablizer for a fluorscent lamp which could be reduce this type of problems, another object of the invention is provided more simple electronic stablizer to the fluorscent lamp which can provide the limitted current and better practice to the electronic stablizer at oscilating high-frequency. Yet the invention is for the lower cost and a stable circuit by providing the sim- pie electronic stablizer. This invention consists of noise filter, voltage multiflying rectifier, inverter with the first and second register, the first, second high-speed switching in the inverter and input trigger connected with commercial power source. Futher objects and advantages of my invention will become apparent- from a consideration of drawings and ensu¬ ing discriptiσn of it. DESCRIPTION OF DRAWINGS Fig. 1, 2 are views of the embodiment circuit of the invention. Fig- 3 is a view of the- designed inducter. Fig. 4 is a view of the another embodiment current- l transformer circuit of this invention. Fig. 5 is a view of equivalent circuit of the Fig. 3 DESCRIPTION OF INVENTION Fig. 1 showes constitution of total embodiment of the circuit of this invention. In Fig. 1 of the drawings, connected in parallel by the noise filter 1 linked to A.C. voltage power source, voltage multiflying rectifier 2, 2' (possible change in accordance with a commercial voltage source) and the first and second current limiter 3, 4, inverter 6; the trigger input of said inverter 6 consists of the capaciter 11 and diac 12 of input trigger 5 directly connected with a commercial voltage source. The noise filter 1 consists by resistence 13 induc¬ tance 14, 15, and capaciters 16, 17, 18 as illustrated in Fig. 1, the output of noise- filter connected with A.C. 110V voltage multiflying rectifier 2 which compose of diodes 19, 20 and electrolic condencers 21, 22, or as illustrated Fig. 2, connected with A.C. 220V voltage mul¬ tiflying rectifier 2 r consisted by the diodes 23, 24, 25, 26 which operated by bridge circuit and electrolic conden¬ cers 27. Therefore, the commercial A.C. input source passed through said voltage multiflying rectifier 2, 2' becomes 2 Vac 1. The output of the voltage multiflying rectifier 2 connects to the first current limiter 3, 3 " ' as resis¬ tence 28, 29 and connected with the second current limiter 4 linked one side of the fluorscent lamp when switch "ON, OFF" of transister 30, 31 in inverter 6, said the second current limiter 4 consists of the counter electromotive force cut-off diodes 32, 33 to the fluorscent lamp and the resonance limiting capaciter 34, 35 in parallel. Two transister 30, 31 in the inverter 6 are connected directly: From direct-current power source, and each base input of two transisters 30, 31 is composed of the first, second high-speed switch 61, 62 of diodes 36, 37 and of two elec- trolic condencers 38, 39; to the first coils 40, 41 of the high--frequency " current transformer to said capaciter 38, 39. The second coil 51 in the current transformer 7 is connected to the inducter directly 42, with another side eldge of the fluorscent lamp, parallely connected to the operating capaciter 43 at the opening position of the another side of fluorscent lamp's filament. Further more, in the Fig. 3 of the drawings said inducter 42 becomes El core type of transister, when the first, second coil 51 are joint together customally, the gap 52 of said El core is about 0.5nt - lή. The Fig. 4 and Fig. 5 showes the current transformer 7 of the invention. In the transformer; a synthetic resin coil bobbin 57 in the central opening 53 inside of outer case 58 with acentral groove 54 at the cylinderical center, interposed core 53 in the central opening 53. As show in the Fig. 5, above core 55, which has the screw-groove 56 on the top and a screw-thread of cylinde- rial surface, joins with the core bobbin 57 which has the screw-thread by cylinderical inside at central opening 53. On above constitution of this invention, the operation and the advantage for the following to, when the power source sw is "ON" and commercial input passes through the noise filter 1, the input is double-up at the voltage multiflying rectifier 2, and the output at the voltage multiflier rec- tifier 2 transmits to the inverter 6. In the starter trigger 5, the trigger pulse is gene¬ rated by the sine wave cycle of the commercial power source at input of half wave and by the capaciter 11 and the diac 12 simultaneously. According to above position the first transister 30 is "ON" state, the second transister 31 is "OFF" state in the inverter 6, and both of them are running over again by the inducter 42, the capaciter 43 under the resonance machanism. Before the start a lamp, the inverter 6 transimits at "ON" state of the second transister 31 and begins charge a lamp and a capaciter connected in parallel. Only one transister becomes "ON" state at moment as a current.transformer of the lamp. The lamp is not "ON" state until begining of discharging voltage for the lamp, and until input of the higher voltage to the capaciter as resonance machanism of the inducter 42 and the capaciter 43. With a portion of the current transformer of the first, second transister base and each "ON/OFF" for the first and second transister start high speedly as first, second high-speed starter 61, 62 -■- ■ no "ON" state happend simultaneously. After start the said lamp, the current fromt the second current limiter 4 to the lamp is cont- rolled effectively when the transister are in "ON/OFF" position. Therefore, the security of the circuit is ensured by stopping and intervening of the counter electromotive force of the high-frequency for the voltage source. The second current limiter 4 can continue discharge at low voltage by decreasing to resonance factor of the resonance circuit with resistence itself of the lamp as capaciters 34, 35. The security of operating condition can continue by limiting the total over-current of the circuit in the first current limiter 3, 3'. On excluding or breaking of the lamp , the oscilating circuit including the inverter 6 is automatically stopped by the "opening" state of the capaciter 61, 62 connected with the inverter 6 switching. When the inverter switching is stopped by unrespected condition, the inverter switching can be started always, and the oscilate operation can not be stopped as far as connecting the lamp by being always input the A.C. power source from the starter trigger 5. In the Fig. 3 of the drawings, the organic energy is appropriately store and the oscilating condition becomes well by enlarging the gap 52 of E and I of the inducter 42. In the Fig. 4 the current transformer can be indemnied the frequency error by change input, by increasing or decreasing of organic energy which the core 55 is used the screw of the top of the core 55. In the invention; the circuit is more secure and in expensive cost by the simpler circuit, and increase a con¬ fidence of circuit by operating of resonance condition between the capaciters 61, 62 and current limiter 3, 3 r , 4: The noise filter 1 is the commercial input line; the starter trigger 5 connected with the voltage multiflying rectifier 2, 2' and the inverter 6 to the way of input, the said.input of inverter 6 transister 31, 32 consist of the high-speed starter as rapid speed for "ON/OFF" of transister 31, 32. While presently preferred embodiments of the inverters have been illustrated and descriped, it will be recognized that the invention may be otherwise variously embodied and practiced within the scope of the claimes.

Claims: AMENDED CLAIMS [received by the International Bureau on 25 August 1989 (25.08.89) original claims 1-3 replaced by amended claims 1-3 (2 pages)] l(amendment) . The electronic stabilizer for a fluorescent lamp characterized by the composition connected between the resonance circuit including inductor L6 and inverter 6 in accordance with the transistors Tl, T2 and the current transformer T comprising: the first coils L3, L4 of the variable current transformer T, the first, and second high-speed starters 61, 62 with the electrolytic condensers eC4, eC5 and two diodes D10, Dll, each connected to the input of the first, and second transistors Tl, T2 in the said inverter 6; the first current limiters 3, 3' and the second current limiter 4 connected among the inverter 6, direct power source, and one side of filament in the fluorescent lamp; the input trigger 5 connected between the input of the first transistor Tl and the commercial power source in the inverter 6; the filament of one side of the fluorescent lamp Lp connected to the output of said inverter 6 through inductor L6; the capacitor C7 connected to the opening part of filament in said fluorescent lamp Lp in parallel. 2(amendment) . The electronic stabilizer for a fluorescent lamp as set forth in claim 1, wherein said inductor L6 becomes trans¬ former comprising El core, and the gap of said El core is about 0.5mm to 1mm. 3(amendment) . The electronic stabilizer for a fluorescent lamp as set forth in claim 1, wherein said variable current transformer r varies the mutual organic energy between the first coils L3, L4 and the second coil L5 utilizing core Tc in the inside of core bobbin Ta of synthetic resin.

Inventors: MOON MYOUNG SOO, MOON, MYOUNG, SOO
Applicants: HAN LIM ELECTRONIC CO LTD, HAN LIM ELECTRONIC CO., LTD.
Application year: 1988
Main classification: H05B41
IPC codes: H02M7, H05B41