JPS58169799A - Device for firing discharge lamp - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a discharge lamp lighting device that generates a pulse voltage in a pulse generator 11 to fibrillate a discharge lamp.

[Technical background and problems thereof] Generally, a pulse generator (1) generates a pulse voltage by controlling its operation based on the voltage applied to both ends thereof. Soshi [, Sai1
As shown in Figures 1i and 2, an isolated magnetic leakage transformer (
2) If the secondary voltage is below Ov, use a discharge lamp (3).
) is connected in parallel with the lamp (3), and its operation is controlled by the voltage across the lamp (3), so there is no problem even if the dimming impedance element (4) is connected in series with the lamp (3). However, for pigeon houses where the secondary voltage of the transformer (2) is 600 m or more, it is necessary to suppress the voltage applied to the pulse generator (1) to 1 oov or less. As shown in Figure 4, the secondary 8# of transformer (2)! (first) and the pulse generator (1) are connected in parallel, so an impedance element (4) for dimming is connected in series with the lamp (3) to dim the light, as shown in Figure 4WJK. When the lamp is lit, the secondary voltage of the transformer (2) does not drop due to the impedance element (4), so the pulse generator (1) operates even while the lamp (3) is lit, which causes noise. there were.

[Purpose of the invention]

The present invention addresses the above drawbacks and is applicable to cases where the secondary voltage of the insulated magnetic leakage transformer exceeds 5oov.
Moreover, even when dimming lighting is performed by connecting a dimming impedance element in series with the discharge lamp, the present invention provides a discharge lamp lighting device that does not generate noise during lighting due to the operation of the pulse generator. [Outline of the ornament] The discharge lamp lighting device of the present invention includes a transformer and two components of the transformer.
A discharge lamp connected to the next winding via an impedance element, a first switch connected in parallel to the impedance element, and a part of the secondary winding operated in conjunction with the first switch. Soo talented! The configuration includes a pulse generator connected via a switch, and a pulse is generated from the circuit during dimmed lighting. ! It is what separates Yu.

[Embodiments of the invention]

Next, one embodiment of the present invention will be described based on an IF5 diagram.

l is an insulated magnetic leakage transformer that boosts the AC voltage input from one end α3t13 of the primary winding m (11,).

The secondary winding (x14) K of this transformer (19) is connected to a [discharge lamp Q4] via an inductor a- as a dimming impedance element. In addition, a parallel switch KJ'1 is connected to the inductor 0.

ae is a pulse generator that outputs a high pulse voltage when the voltage at both ends is higher than a predetermined voltage, and is connected to the secondary winding II of transformer I (
114) is connected in parallel to -Iku. The fin is a second switch that turns off simultaneously or with a slight time delay in conjunction with the first switch asec.

Next, the operation of this embodiment will be explained.

The first year old and the first year old! The switch -an is on. In this state, when AC voltage is applied between terminals (13 (1 m), the envy pressure S is raised to 8E!Next *11 (114
) An AC voltage of 00V or higher is output at both ends. The pulse generator S is operated by this AC voltage and outputs a pulse voltage. This pulse voltage is the secondary winding - (114) K″C
In the C position, the lamp t4% is started by this voltage sail, and all parties are lit. Then, the voltage across the lamp 1, that is, the output voltage of the secondary winding (lz4) decreases, and the pulse generator stops operating.

Next, when the switch 1 is turned off for dimmed lighting 5, the switch αη of 2 is also turned off at the same time or with a slight time delay.

Therefore, by passing the inductor, the secondary winding m(
Even if the output voltage of 114) becomes higher than the voltage across lamp A during lighting, the pulse generator will not resume operation because it is disconnected from the enclosure.

In addition, the switch aη of the above 2 is the switch a9 of jrl.
The time when the switch is turned off with a longer time delay must be a time during which the pulse voltage is generated from the pulse generator and does not cause any problems to other devices as "c4 noise."

〔Effect of the invention〕

According to the present invention, since the pulse generator is disconnected from the circuit during dimming lighting, when the impedance element for dimming is connected, the voltage across the secondary winding of the transformer increases.
This also prevents the generation of pulse voltages that cause noise to other devices.

[Brief explanation of drawings]

Figures 1 through 4 are circuit diagrams of conventional discharge lamp lighting devices. Figures 1 and 1FS are circuit diagrams showing an embodiment of the discharge lamp lighting device of the present invention. aυ...Transformer, (114)...Secondary winding, 0...Inductor as an impedance element, ◆...Discharge lamp, U41/S1 switch, α...Pulse generator,
Wholesale...Sai 2 switch.

Claims (1)

[Claims] (1) A transformer, a discharge lamp connected to the secondary field 111 of this transformer through an impedance element, a switch connected in parallel to the impedance element - flK, and one of the secondary fields 111 of the transformer. A discharge lamp lighting device comprising: a pulse generator connected via an IF-compatible switch that operates in conjunction with the switch 1-1.