JPS6030043A - Electrode for low pressure electric-discharge lamp - Google Patents

Abstract

PURPOSE:To increase the number of electrons discharged during the ignition of a low pressure electric-discharge lamp so as to facilitate the ignition by making an electrode for the lamp in such a manner that the voltage required for initiating glow discharge between wires supporting a fiament is smaller than the voltage of the filament during preheating. CONSTITUTION:The electrode of a low pressure electric-discharge lamp such as a fluorescent lamp, consists of a filament 1 and wires 2 supporting the filament 1. When voltage applied to the filament 1 having a resistance of (Rf) during preheating performed for ignition is supported to be (Vf) and voltage necessary for initiating glow discharge between the supporting wires 2 and 2 located apart from each other by (d) is supposed to be (Vig), they are adjusted according to the relationship of Vig<=Vf by decreasing (d) for example by curving the supporting wires 2. As a result, electrons necessary for dielectric breakage for main electric discharge are supplied owing to the radiation of thermions from the filament 1 and the glow discharge between the supporting wires 2 during preheating, thereby greatly facilitating the ignition.

Description

TECHNICAL FIELD The present invention relates to electrodes for low pressure discharge lamps, such as fluorescent lamps.

(Background Art) In the electric current design of general fluorescent lamps, the glow discharge starting voltage between the support wires that support the filament is larger than the voltage across the filament during preheating, that is, the preheating voltage. , during preheating of the starting chamber, the initial electrons required for dielectric breakdown are only the hot electrons emitted by preheating the filament coated with the polar material, 'fM.

(Object of the Invention) The present invention has been made in view of the above points, and its object is to provide an electrode for a low-pressure discharge lamp that can increase the initial number of electrons required for dielectric breakdown at the time of starting. .

(Disclosure of the Invention) Does Figure 1 relate to the present invention? ! ! In the simplified diagram of the pole, the filament 2 is coated with a lid electrode material, and 2 is a support wire that supports the filament 1 and electrically connects it to an external circuit.

In such an electrode, the voltage applied to the filament 1 having a resistance value Rf at the time of pre-Hp for starting is Vf, and the voltage required to start glow discharge between both support lines 2.2 having a distance d is defined as Vf. Let be vig. The conventional y
In iw design, both support lines 2,
No glow discharge occurs between the two. Therefore, vig≦vf
By setting the resistance value Rf of the filament 1 and the distance d between the support wires 2.2 so that -1, the electrons necessary for the dielectric breakdown of the main discharge reservoir are released! 14. Therefore, starting is easier than with conventional electrodes.

21st XI I'll, lbl, +C) kl
Book B Akira (7) 'IJ k example, lal
611 filament 1 is arranged parallel to support line 2, so-called vertical filament) With i'7i life, support line 2.2
It is designed so that the interval between: '1% d satisfies the above conditions. lbl &: I This is an example of improving the conventional lateral Li9 function. 2. The part between 2 and 2 satisfies the above conditions -) and the adjacent part (the part indicated by dimension d in the drawing) is one throw. tc+ is also a case of one filament, but it satisfies the above conditions and does not cause glow discharge and is provided with an auxiliary 0π3.

(＠Effect of light 9) The present invention is capable of supplying the electrons required at startup not only by conventional thermionic electrons but also by glow discharge, so it can be used for conventional low-pressure open-air lamps. It becomes easier to start and finish, and there is less wear and tear on the electric kite material that can be applied to the fiwomen at the time of start-up, so the life of the wamp can be improved (there is also an additional effect).

[Brief explanation of the drawing]

FIG. 1 is a simplified diagram of the electrode according to the present invention, FIG. 2 is 1a1,
Ibl and tc+Vi are respectively simplified diagrams (not shown) of specific example 2 of the same. Patent applicant: Matsushita Town, Kogyo Co., Ltd. Agent: Tsutsumaru Takeyu (and 2 others)

Claims (1)

[Claims] (1) The filament voltage during preheating is Vf, and the glow discharge interval It71 between both support wires that support the filament is
N, when the voltage is vig, the relationship vig≦Vf holds true.