JPS58142797A - Device for firing multi-lamp serial 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] The present invention relates to a multi-light IM array type 4-lamp exclusive lighting device,
To provide a structure of a multi-light series discharge lamp lighting device which absorbs variations in the life of each discharge lamp and accommodates the ineffectiveness of single-layer lamps.

11 rows, 6th order, 41111/1, 19 light circuits are shown.
Therefore, the input and demand of the leakage transformer 2 is (11f for i6).
Then, the discharge lamp group 4.5 is connected to the output terminal of the leakage transformer 2 via the phase advancing capacitor 3, respectively, using IP.
JK's discharge lamp 6.7 is hit by target 6'r, and discharge lamp 6
('Till; column (This is connected to the engine controller 8 for starting assistance.Then, the input winding 2af of the leakage transformer 2 is connected to the input winding 2af.
Turn each filament in 7! (・tIjfI preheating 1" preheating circuit bu preheating winding 49, 1n, +t
are transformer coupled.

When the commercial power supply 1 is turned on in such a circuit, the output of the leakage transformer 2 is applied to the lamp 7, and the output of the leakage transformer 2 is applied to the lamp 7, and the output of the leakage transformer 2 is applied to the lamp 7, and the sequence capacitor 8 is blocked. Light 7d slight modification, II Shit + th male “Kuma ni・1”
Nine/).

Therefore, since the impedance of the sequence capacitor 8 is very large compared to the impedance of the 4j lamp 7, most of the pressure of the upper 100 pin output 11 is caused by the sequence capacitor ``I''. 8 and is therefore in series with the sequence capacitor 8 by this voltage 11]
6 starts, and the series-connected discharge lamps 6 and 7 start smoothly and sequentially due to the inductance of the cage transformer 2 and the well-known starting assist function of the phase advancing capacitor 8. Although this leads to lighting, the inventor of the present invention
When a so-called short-term flashing lamp life test was carried out in such a device 4 by turning on and cutting off the commercial power supply 1 at intervals of 10 seconds, for example, and repeating this, it was found that
It has been found that the filament breaks and the electron emitting substance called a gland or mechanism emitter disappears more quickly in this discharge lamp than in the other discharge lamp 7.

Is this the start of the release 41 light 7? 7] period, i.e. 4yj 1 piece 4
Sometimes, due to the intervention of the high-impedance sequence capacitor 8, the small current flowing into the discharge lamp 7 is small, and when the discharge lamp 7 is about to shift to rated lighting due to the start 111 of the other discharge lamp 6, its discharge is interrupted. The flow gradually becomes stronger, and therefore the energetic stress applied to the discharge lamp 7 gradually increases.
When the n lamp 7 is started, there is a sudden jerk, and this voltage, which is close to the output voltage of the leakage transformer 2, is applied to the discharge lamp 6 all at once, and a large discharge current is generated all at once to reach the rated lighting.
This is thought to be because, as the filament tends to flow, a large amount of stress is suddenly applied to the discharge lamp 6, especially its filament.

In view of such drawbacks, the present invention has been developed by making the number of turns of the preheating winding 9. is made larger than the preheating current of the other discharge lamp 7.

As is well known, increasing the preheating current promotes the separation of the filaments from the filament (the stress on the filament when pressure is applied is alleviated, resulting in the release of two lights).
(ri starts smoothly, the life of the discharge lamp 6 becomes self-sufficient, and therefore the difference in the lifespan of the discharge lamps 6 and 7 can be almost eliminated.

Therefore, even if both lamps are crossed at the same time during the life of one of the 4X lamps, the lamp cost will not increase, and lamp replacement efficiency can be greatly improved.

In the above embodiment, since the number of turns of the preheating winding 10 and the preheating winding 11 are older, the preheating flow 14i of the discharge lamp 7 differs depending on the filament, but in practical terms, the life of the discharge lamp 7 is There is no particular problem that it becomes faster, and of course the preheating winding [0
Even if you divide it into two windings and preheat it, you can also set up four wires and preheat each filament separately.

・Figure 2 shows an example for 4 lights, with 2 lights connected in series.
Each of the two blowing lamp groups 4 and 5 has two radiating lamps 14 and 12, I
:(, 14 and 15 are connected in parallel with the discharge lamp group 4 by connecting one end of the output of the cage transformer 2 and the connection point of the discharge lamp group 4.5. The number of turns of the preheating windings 16, 17, 18 that preheat the filaments of the discharge lamps 12, 13 of the city light group 4 is t of the other one.
Discharge lamp 14 of i-lamp group 5. The configuration differs from the example for two lamps described above in that the number of turns is set approximately equal to the number of turns of the preheating winding 4At320.2t for preheating the filament of the IFI.

1iij+ work: Like the one in Fig. 1, first, the sequence capacitor 8 discharges the discharge lamp group 5, 1 lamp 14. lfi
started, and the discharge lamps 12 of the discharge lamp group 4, which had been supplied with a preheating current larger than the discharge lamps 14.15,
L'l starts very smoothly and all the lights [low light 12...
15 shifts to rated lighting.

In the above case, the preheating circuit is connected to the leakage transformer 2 by the preheating windings 9...11,16...
21, the preheating circuit can be adjusted by simply changing the number of turns, but the preheating circuit may be constructed by separately providing four sources for preheating. The present invention is designed to connect the sequence capacitor in parallel [
There is a large difference in the filament preheating current of the discharge lamps between a group of shell lamps that are in parallel and a group of discharge lamps that are in a series relationship. The difference in lamp life between the discharge lamp groups has been reduced, and even if all lamps are replaced at the same time, the lamp cost will not increase by that much, making it possible to improve lamp replacement efficiency.

[Brief explanation of the drawing]

・Tower 1 and 1 are the circuit diagrams of a two-lamp type electric light lighting device according to the present invention, and FIG. 2 is a circuit diagram showing an example in which the present invention is applied to a four-lamp system. 1... Commercial-rl! R, 2...Leakage transformer, A. 5...because (■, light group, 6, 7, +2.13.
14.15... Projection light 8... Sequence contenter, 9, +0.11, 16.1718, 19,
Addition, 21... Preheating winding. Patent Applicant Matsushita, Hako Co., Ltd. Representative Patent Attorney Toshimaru Takemoto (and 2 others) (7) Procedural Amendment 1. Matters (Cow Table 8\ 1981 Patent Application No. 25113 2, Name of the Invention
Relationship with the case of the person making the amendment Patent Applicant Address 1048 Kadoma, Kadoma City, Osaka Name Name (583) Matsushita Electric Works Co., Ltd. f''
71-Toko, 10 Oaza Kadoma, Kadoma City, Osaka Prefecture
No. 48 Matsushita Electric Works Co., Ltd. Patent Department Name (6201) Tori-' Sir Takemoto
Maru (1) θ Tsuki old M*2@@+r7titn
``Colored bag, s +4. way zta%'' 7 loincloth correction. (2) Betsuyori Akane's own λυ divine correction of the connection point in Figure 2, Figure 2, 8 of Figure 1. ζgo cnufu i-tn 11 Procedural amendment document March 2, 1980 Patent application No. 25113 2, title of invention Multi-lamp series type modified electric light tunn light device (3) Related Patent Applicant Address 1048 Kadoma, Kadoma City, Osaka Name <583) Matsushita Electric Works Co., Ltd. 4, Agent Address 100-5 Kadoma, Kadoma City, Osaka Prefecture Date of Amendment Order June 1, 1983
(Shipped on March 8, 1972) 6. Subject of amendment (2) Drawings 2. Please engrave the text as shown in the attached sheet (no changes are made to any part of it). Figure 2 433-

Claims (1)

[Claims] (1) Connect two discharge lamp groups, each formed by series connection of one or more discharge lamps with filaments at both ends of an AC power supply, through a current limiting element, and connect one discharge lamp group and the other discharge lamp group. In a multi-lamp parallel discharge lamp lighting device, a sequence capacitor of the starting Urasuke A is connected in parallel, and a preheating circuit is provided to supply four preheating flows to the filament of the discharge lamps of each discharge lamp group. A multi-light parallel discharge lamp lighting device characterized in that a filament preheating laminar flow of a group of discharge lamps connected in parallel with a sequence capacitor is made higher than a filament preheating current of the other discharge lamp group.