WO1992017042A1

WO1992017042A1 - Apparatus for lighting fluorescent lamp

Info

Publication number: WO1992017042A1
Application number: PCT/KR1992/000008
Authority: WO
Inventors: Choon Geon Park
Original assignee: Choon Geon Park
Priority date: 1991-03-13
Filing date: 1992-03-13
Publication date: 1992-10-01
Also published as: KR920019216A

Abstract

An apparatus for lighting a fluorescent lamp, by which energy saving and quick-starting are possible, and also, lighting the fluorescent lamp is easy even with a low frequency electric power. The apparatus comprises current limiting means and preheating means. The current limiting means is made up of diodes, etc. which so operate as to make an AC correspond alternately, current amplifying circuits for amplifiying the currents transferred via the diodes, etc., limiting transistors for suppressing the amplifying circuit from amplifying the currents excessively, bias resistors for setting the reference values of the currents which flow through the amplifying circuits and the limiting transistors, and the like. The current limiting means limits the currents, which are made to correspond alternately, to predetermined levels. The preheating means preheats the filaments at both the ends of the fluorescent lamp by supplying to them the AC power outputted by the current limiting means and stops its own operation after the discharge starts and the lamp lights.

Description

Lighting device for fluorescent lamps

The present invention relates to a fluorescent lamp lighting device capable of easily lighting a fluorescent lamp with low-frequency power. Background art

In general, conventional fluorescent lamp lighting devices are electric cathode preheating discharge lighting devices that use a choke coil or lighting methods that recently use a high-frequency oscillation method. The lighting method that uses the LED not only consumes a large amount of power but also makes it difficult to turn on instantaneously.The high-frequency oscillation method generates electromagnetic waves and interferes with other surrounding electronic devices, causing malfunctions and noise. There was a problem that induces. BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 is a basic block diagram of the present invention, Fig. 2 is a schematic waveform diagram of the voltage at both ends of the fluorescent lamp of the present invention, and Fig. 3 is an embodiment of the current limiting means of the present invention. FIG. 4 is an embodiment diagram of the preheating means of the present invention, and FIG. 5 is an overall embodiment diagram of the present invention. SUMMARY OF THE INVENTION An object of the present invention is to provide a fluorescent lamp lighting device which enables power saving (energy saving) and instantaneous lighting, and facilitates lighting of a fluorescent lamp even with low-frequency power. Hereinafter, the technical configuration of the present invention will be described in detail as follows. As shown in FIG. 1, the basic configuration of the present invention is a diode (D1 to D4) which is formed symmetrically and operates so as to alternately correspond to AC power; And a limiting transistor (1Q) that amplifies the current transmitted through D4) and a limiting transistor (1Q) that operates to suppress excessive amplification of the current in the amplifier circuit (10). 20) and a bias portion (30) comprising a bias resistor for setting a reference value of a current flowing through the amplifier circuit (10) and the limiting transistor (20). Current limiting means (100) for limiting the current to a predetermined level while causing the AC power output from the current limiting means (100) to be in the filament at both ends of the fluorescent lamp (50). To start heating the filament and start discharging, turning it on. A basic feature of the technical configuration is that it is constituted by a fluorescent lamp lighting device characterized by being constituted by preheating means (200) whose operation is stopped.

Here, the amplifier circuit (10) of the current limiting means (100) is composed of amplification transistors (Q11, Q12) as shown in FIG. 3, and the base is a limiting transistor. The collector is connected to the collector terminal of the transistor (Q21) and the base terminal of the limited transistor (Q21, Q22). Alternatively, as shown in FIG. 5, it can also be constituted by dull-ton circuits (Q13, Q14: Q15, Q16).

Such a basic configuration of the present invention is shown in FIG. In addition, a diode (D1 to Dz) or the like connected to the current eye control means (100) controls the power applied to the AC power source to the width circuit (10) and the limiting transistor ( 20), and the amplifying circuit (10) and the limiting transistor (20) limit and output the alternating current to a predetermined level to output the preheating means (2). The preheating means (200) preheats the filament of the fluorescent lamp (50) at the output and operates at the discharge starting voltage (V1). The lamp is lit after the discharge has started and operates to stop when the threshold voltage (V3) is reached. The lighting is continuously maintained at the discharge sustaining voltage (V2) and the low frequency However, the advantage is that the fluorescent lamp (50) is easily turned on.

On the other hand, as shown in FIG. 5, prior to the current limiting means (100), before the discharge is started, the applied AC voltage is increased to a distribution voltage, and after the discharge is started and the lamp is turned on. A voltage distribution means (300) for maintaining a predetermined AC voltage is additionally provided, so that the voltage is increased to a predetermined level or more and the overall operation is ensured. It is desirable to do so.

This is a symmetry that the first and second electrolytic capacitors (CI, C2) respectively connected to both ends of the AC power supply and the electrolytic capacitors (CI, C2) are alternately charged. It consists of diodes (D5, D6).

Both ends are connected to the input and output terminals of the amplifier circuit (10). An additional diode diode (ZD1) is connected, so that only the upper end of the input voltage is clipped to keep the output of the amplifier circuit (10) at a predetermined level. It is preferable to use it.

On the other hand, as shown in FIG. 4, the preheating means (200) is provided with a triac (TRC41) which conducts by a trigger and a triac (TRC41). One embodiment such as (A) is constituted by a diagonal (Diac 41) for applying a trigger to the gate and resistors (R41, R42). The thyristor (SCR) and the trigger (Diac 4) are placed on the center line of the diode bridge (D41 to D44. D45 to D48). 2) and the resistor (R 43), and the transistor (TR 41) and its driving element are connected to the zener diode (ZD 41) and the resistor (R 44), respectively, and (B) and As in (C), the second and third embodiments can be configured.

The overall embodiment of the present invention shown in FIG. 5 is composed of first and second electrolytic capacitors (C 1 .C 2) connected to both ends of an AC power source, and the electrolytic capacitor (C 1. , C

2) The voltage distribution means (300) consisting of symmetrical diodes (D5, D6) that are charged alternately, and the diodes (D7, D8, D9) that operate alternately. , D 12) and collectors are connected to both electrodes of the electrolytic capacitors (CI, C 2) via diodes (D 10, D 11). Both ends of the Darlington circuit (Q13 to Q16) serving as a width circuit (10) and the input / output terminals of the Darlington circuit (Q13 to Q16) A zener diode (ZD1) which is connected and holds only the upper end of the input voltage to maintain the output of the dull-ton circuit (Q13-Q16) at a predetermined level. The collector is connected to the base end of the dull-ton circuit (Q13 to Q16) through a diode (D13 to D16). Is connected to a power supply terminal via a diode (D17, D18), and the limiting transistor (Q13 to Q1) is connected to the limiting transistor (Q23). 6) and a current limiting means (100) composed of bias resistors (R35 to R37) connected to the respective base input terminals of the limiting transistor (Q23). : Predetermined slot It is not conducted below the load pressure (V 3) and does not conduct with the diodes (ZD 2, ZD 3) etc. which are connected to alternately operate by the diodes (D 19, D 20). A diode (Diac 1) connected to a common point of the antenna diodes (ZD 2, ZD 3); and a diode (Diac 1) and antenna diodes (ZD 2, ZD 3). 3) and a preheating means (200) consisting of a triac (TRC1) that moves by the trigger of the resistance (Rl, R2). .

Such an overall embodiment is characterized in that the diode of the voltage distribution means (300) operates to alternately charge the electrolytic capacitors (Cl, C2) with AC power, and Capacitor One (CI, C2) increases the AC voltage to a distribution voltage, and after the discharge of the fluorescent lamp (50) starts, it operates so that a predetermined AC voltage is maintained. The diode of (0) is applied to the AC '01 source. The '01 power is alternately applied to the Darlington circuit (Q13 to Q16) and the limiting transistor (Q23). When activated, the Darlington circuit (Q13 to Q16) and the limiting transistor (Q23) vigorously limit the alternating current to a predetermined level and reduce the preheating means (2 The diode (ZD 2, ZD 3) of the preheating means (200) and the diac (Diac 1) are linked to operate the fluorescent lamp (500). ) When the voltage at both ends exceeds the threshold voltage (V 3), a trigger is applied to the triac (TRC 1) to make the triac (TRC 1) conductive. By doing so, the filament of the fluorescent lamp (50) is preheated by the current applied by the current limiting means (I00), and the discharge lamp starts operating. When the fluorescent lamp (50) is turned on, the voltage applied to both ends of the fluorescent lamp (50) drops instantaneously, and the voltage between both ends falls below the threshold voltage (V3). The triac (TRC 1) is opened and the preheating current is cut off without being triggered. Thereafter, a predetermined AC voltage is maintained by the electrolytic capacitors (C 1, C 2), and the point of the fluorescent lamp (50) is turned on. There is an advantage that holding the lamp enables energy saving and instantaneous lighting, and at the same time makes it easier to turn on the fluorescent lamp even with low-frequency power. As described above, since the present invention does not use a choke coil, not only can the circuit configuration cost of the fluorescent lamp lighting device be reduced, but also the power loss can be significantly reduced. Since the low frequency of a general AC power supply that is not a high-frequency oscillation method is used as it is, there is no effect of malfunctioning and noise of electronic equipment due to electromagnetic interference generated by the high-frequency oscillation method, and it is possible to maintain the lighting of the fluorescent lamp. is there.

(Hereinafter the margin)

Claims

Range of

1. Diodes, etc., that operate so that AC power alternates

A amplification circuit for amplifying a current transmitted through a diode or the like;

A limiting transistor that operates to suppress excessive amplification of current in the amplifier circuit;

It is a bias resistor or the like for setting a reference value of a current flowing through the amplifier circuit and the limiting transistor, and is output by the current limiting means for alternately responding and limiting the current to a predetermined level; AC power is supplied to the filaments at both ends of the fluorescent lamp to preheat the filaments. Characteristic lighting device for fluorescent lamps.

2. The fluorescent lamp lighting device according to item 1, wherein the amplification circuit is a Darlington circuit.

3. In Claim 1, the lighting device for a fluorescent lamp, wherein the amplification circuit is an amplification transistor.

4. In the first clause, before the current limiting means, before the discharge is started, the applied AC voltage is increased to a distribution voltage, and after the discharge is started and lighting is performed, a predetermined AC voltage is maintained. Voltage distribution means for increasing the voltage above a predetermined level to ensure the overall operation. Fluorescent lighting equipment E.

In FIG. 1, the ffi-, α-pressure-stages are alternately filled with first and second electrolytic capacitors respectively connected to an AC source terminal, and the electrolytic capacitors. A lighting device for a fluorescent lamp, wherein the lighting device is a first and a second diode.

In the first paragraph, only the upper end portion of the input voltage is clipped so that a diode diode whose both ends are connected to the input / output end of the width circuit is added.蛍光 A fluorescent lamp lighting device characterized in that the output of the fci circuit is maintained in predetermined water to extend the life of the fluorescent lamp for a long time.