JP2001243913A - Fluorescent lamps and compact fluorescent lamps - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bulb-shaped fluorescent lamp with improved light flux start-up characteristics at start-up and light flux stability at lighting operation. SOLUTION: The bulb-shaped fluorescent lamp is provided with a cover with a base, a translucent glove, a light-emitting tube contained in the glove, and a high frequency lighting circuit having an inverter circuit contained in the cover for high frequency lighting. An alloy amalgam constituted with the composition ratio in weight % as in Bi:Pb:Sn:Hg=(38-46):(15-19):(30-36):(0.5-15) is contained in the light-emitting tube so as not to protrude from a thin tube. The mercury vapor pressure is high at ambient temperature, and light flux is easy to get stable at start-up, and at same time, suppresses the mercury vapor pressure even if the temperature rises, and so is stable at stable operation time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent lamp and a bulb-type fluorescent lamp in which the mercury vapor pressure during stable lighting is controlled and the luminous flux rise is improved.

[0002]

2. Description of the Related Art Hitherto, as a bulb-type fluorescent lamp of this type, the configuration described in Japanese Patent Application Laid-Open No. 11-16386 is known. Japanese Unexamined Patent Publication (Kokai) No. 11-16386 discloses that the composition ratio of the main amalgam is adjusted so that the reaction end temperature when the main amalgam changes from the solid phase to the liquid phase is lower than the ambient temperature of the main amalgam during the lighting operation. Bi: Pb: S in%
n: Hg = (40-58) :( 22-55) :( 5-2)
0): (1 to 10) to improve the luminous flux stability during the lighting operation without deteriorating the luminous flux rising characteristics at the start.

[0003]

However, in the case of the bulb-type fluorescent lamp described in Japanese Patent Application Laid-Open No. H11-16386, there is room for improvement in the luminous flux rising characteristics at the time of starting and the luminous flux stability at the time of lighting operation. It is desired to further improve the luminous flux rising characteristics at the time of starting and the luminous flux stability at the time of lighting operation.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a fluorescent lamp and a bulb-shaped fluorescent lamp having improved light flux rising characteristics at start-up and light flux stability during lighting operation. .

[0005]

According to a first aspect of the present invention, there is provided a fluorescent lamp comprising: an arc tube;
And Bi: Pb: Sn: Hg = (38-46) :( 15-
19): (30-36): a main amalgam of (0.5-15), which has a proper mercury vapor pressure at the time of starting and lighting operation, and has a luminous flux rising characteristic at the time of starting. Also, the luminous flux stability during the lighting operation is improved.

A fluorescent lamp according to a second aspect of the present invention is the fluorescent lamp according to the first aspect, wherein Hg has a mass% of 0.5 or more and less than 1.3. To improve the luminous flux rising characteristics at the time of starting and the luminous flux stability at the time of lighting operation.

A fluorescent lamp according to a third aspect of the present invention is the fluorescent lamp according to the first aspect, wherein Hg has a mass% of 0.5 or more and less than 1.0, and further has a mercury vapor pressure during starting and lighting operation. To improve the luminous flux rising characteristics at the time of starting and the luminous flux stability at the time of lighting operation.

According to a fourth aspect of the present invention, there is provided a bulb-type fluorescent lamp comprising: the fluorescent lamp according to any one of the first to third aspects; and a lighting circuit for lighting the fluorescent lamp.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the fluorescent lamp of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show a first embodiment, FIG. 1 is a graph showing the relationship between amalgam temperature and mercury vapor pressure, FIG. 2 is a side view of a fluorescent lamp, and FIG. FIG. 4 is an exploded view of a bulb of the fluorescent lamp.

2 and 3, reference numeral 11 denotes a bulb-shaped fluorescent lamp. This bulb-shaped fluorescent lamp 11 is an E26 type base.
A cover 13 having 12, a translucent globe 14, an arc tube 15 housed in the globe 14, and a high-frequency lighting circuit 16 having an inverter circuit housed in the cover 13 for high-frequency lighting are provided. The envelope 17 composed of the cover 13 and the globe 14 is, for example, JIS C 75
It is formed in an outer shape that is close to the standard dimensions of the general lighting bulb defined in No. 01.

Next, description will be made with the base 12 side being the lower side and the glove 14 side being the upper side.

First, the cover 13 has a cover body 21 formed of a heat-resistant synthetic resin such as polybutylene terephthalate (PBT). This cover body 21
It has a substantially cylindrical shape that expands upward, and has a lower end portion covered with a base 12 such as an E26 type and fixed by bonding or caulking.

The globe 14 is transparent or milky white having a light diffusing property, and is formed of glass or synthetic resin into a smooth curved surface having substantially the same shape as a glass bulb of a general lighting bulb. The portion is fitted and fixed inside the opening at the upper end of the cover 13. The globe 14 can be combined with another member such as a diffusion film to improve the uniformity of luminance.

The high-frequency lighting circuit 16 includes a horizontal circuit board 22, which is a disc-shaped circuit board arranged perpendicular to the longitudinal direction of the arc tube 15.
A plurality of electric components 23 and 24 are mounted on the lower surface on the 12 side and the upper surface on the arc tube 15 side.

The luminous tube 15 has a bulb 31 as shown in FIG. 4, and a three-wavelength luminescent type phosphor layer 32 is formed on the inner surface of the bulb 31. A rare gas such as argon and mercury are sealed, and a pair of preheating electrodes 33a and a non-preheating electrode 3 are provided at both ends of the bulb 31.
3b is sealed with a pinch seal.

Further, the valve 31 has three tubes 34a, 34
b, 34c, and these pipes 34a, 34b, 34c are formed in a substantially U-shape that is smoothly curved at the middle part.
The communication pipes 35 and 35 communicate and connect between 4b and the pipes 34b and 34c.

In a state where the bulb 31 is incorporated in the bulb-type fluorescent lamp 11, each of the tubes 34a, 34b, 34c
As shown in FIG. 2, the light-bulb-shaped fluorescent lamp 11 is positioned at equal intervals on one circumference centered on a central axis whose longitudinal direction is the vertical direction, and is disposed corresponding to each side of the triangular cross section. I have.

At the end of each of the tubes 34a, 34b, and 34c of the valve 31, small tubes 40a, 40b, and 40c are provided so as to communicate with each other.
Reference numerals a and 40c protrude from the end opposite to the end where the preheating electrode 33a or the non-preheating electrode 33b is sealed. And
The valve 31 is exhausted through each of the small tubes 40a, 40b, 40c,
After the gas is filled and replaced, each of the thin tubes 40a, 40b,
Sealed by fusing 40c.

Further, the thin tube 40a closest to the preheating side electrode 33a
Contains a main amalgam 41a as amalgam. This main amalgam 41a has a composition ratio of B
i: Pb: Sn: Hg = (38-46) :( 15-1
9): An alloy composed of (30 to 36): (0.5 to 15), which is accommodated so as not to be from the thin tube 40a. Hg is preferably in a range of 0.5 to less than 1.3% by mass, and more preferably in a range of 0.5 to less than 1.0.

The preheating-side electrode 33a and the non-preheating-side electrode 3
3b has a triple coil filament coil 43 in which a tungsten (W) wire is triple-wound, and this filament coil 43 is supported by a pair of wells 45 serving as feed lines, and each well 45 is connected to an end of a tubular body 34a, 34c. It is connected to a wire 47 led out of the tubes 34a and 34c via a dumet wire 46 sealed to the glass of the section. The dumet wire 46 is sealed by a pinch seal portion 48 at the valve end. Then, when the bulb 31 is incorporated in the bulb-type fluorescent lamp 11, the wire 47 is connected to the high-frequency lighting circuit 16.

Further, an auxiliary amalgam 52a is attached to the wells 45 of the preheating side electrode 33a and the non-preheating side electrode 33b, and the auxiliary amalgam 52a is enclosed in the valve 31 together with the electrodes 33a and 33b. In addition, auxiliary amalgam 52a
Indium is applied to the surface of a metal foil such as stainless steel or nickel, or a high melting point metal foil such as molybdenum, tantalum or niobium by plating or vapor deposition.

A tube 34b located in the middle of the valve 31
An auxiliary amalgam 52b is provided at an end opposite to the thin tube 40b and at an end far from the main amalgam 41.
The auxiliary amalgam 52b has the same mercury vapor pressure characteristics as the auxiliary amalgam 52a, and adsorbs mercury vapor when the lamp is turned off and emits mercury vapor when the lamp is turned on.

Next, the operation of the present embodiment will be described.

First, the main amalgam 41 is sealed in the thin tube 40a closest to the electrode 33 out of the plurality of thin tubes 40a, 40b, 40c provided in the middle portion of the bulb 31, so that the heat effect from the preheating side electrode 33a causes In addition to preventing the temperature of the main amalgam 41 from becoming too high,
Can be easily warmed.

The preheating electrode 33a and the non-preheating electrode 3
By the auxiliary amalgam 52a arranged in 3b and the auxiliary amalgam 52b arranged in the middle position between the electrodes 33a and 33b, mercury can be emitted at the initial stage of lighting, and the rising characteristics of the luminous flux can be improved.

Further, by enclosing in the valve 31 an auxiliary amalgam 52b having a mercury vapor pressure characteristic substantially similar to that of the main amalgam 41 and the auxiliary amalgam 52a, the valve 3 cooperates with the main amalgam 41 and the auxiliary amalgam 52a.
The mercury vapor pressure in 1 can be kept in an appropriate range, and the time required for the luminous flux to stabilize at the time of starting can be shortened.

The main amalgam 41 has a composition ratio of Bi: Pb: Sn: Hg = (38-46) :( 15
19): (30 to 36): (0.5 to 15), so that the mercury vapor pressure in the arc tube 15 can be made relatively high even at room temperature, and the mercury vapor pressure is suppressed to an appropriate value during stable lighting. In addition, it is possible to prevent a decrease in efficiency due to excessive mercury vapor pressure.

According to experiments, as shown in FIG. 1, pure mercury a has a relatively high mercury vapor pressure at room temperature, but the mercury vapor pressure rises more than necessary as the temperature rises, and the efficiency decreases during stable lighting. Resulting in.

In the case of Bi-In-Hg, in which the mass% of mercury is set to 2%, the mercury vapor pressure can be suppressed even if the temperature rises, but the mercury vapor pressure is low at normal temperature and the luminous flux at the time of startup is low. Not stable.

Further, Bi-In-Hg-based materials in which the mass% of mercury is set to 4%, c or 6%, are also capable of suppressing the mercury vapor pressure even if the temperature rises, but at room temperature. The mercury vapor pressure is low and the luminous flux is difficult to stabilize at startup.

Further, in the case of Bi-Pb-Sn-Hg system, in which the mass% of mercury is 6%, the mercury vapor pressure is high at room temperature and the luminous flux is easily stabilized at the start, but the mercury vapor pressure is slightly increased when the temperature rises. It is difficult to suppress the luminous flux when stable because it is difficult to suppress the luminous flux.

On the other hand, Bi-Pb-Sn-Hg, in which the mass% of mercury is set to 1.5%, f or 1.0%, has a high mercury vapor pressure at room temperature and tends to stabilize the luminous flux at startup. At the same time, even when the temperature rises, the mercury vapor pressure is suppressed, so that the luminous flux is stabilized even when the temperature is stable.

As described above, the main amalgam 41 contains Bi-Pb
-Sn-Hg alloy is preferably used.
It is preferable that the mass% of g is 0.5 or more and less than 1.3, and it is more preferable that the mass% is 0.5 or more and less than 1.0.

The lighting fixture can be constructed by mounting the bulb-type fluorescent lamp 11 on a fixture main body having a socket for connecting a general lighting bulb.

[0036]

According to the fluorescent lamp of the first aspect, the composition ratio of the main amalgam sealed in the arc tube is B in mass%.
i: Pb: Sn: Hg = (38-46) :( 15-1
9): (30-36): (0.5-15)
By appropriately setting the mercury vapor pressure at the time of starting and lighting operation, it is possible to improve the luminous flux rising characteristics at the time of starting and the luminous flux stability at the time of lighting operation.

According to the fluorescent lamp according to the second aspect, in addition to the fluorescent lamp according to the first aspect, since Hg has a mass% of 0.5 or more and less than 1.3, mercury at the time of starting and lighting operation is further improved. By setting the vapor pressure appropriately, the luminous flux rising characteristics at the time of starting and the luminous flux stability at the time of lighting operation can be improved.

According to the fluorescent lamp of the third aspect, in addition to the fluorescent lamp of the first aspect, since Hg has a mass% of 0.5 or more and less than 1.0, mercury during starting and lighting operation is further increased. By setting the vapor pressure appropriately, the luminous flux rising characteristics at the time of starting and the luminous flux stability at the time of lighting operation can be improved.

According to the bulb-type fluorescent lamp of the fourth aspect, since the lighting circuit for lighting the fluorescent lamp of any one of the first to third aspects is provided, each effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a graph showing the relationship between the temperature of amalgam such as a fluorescent lamp and the mercury vapor pressure according to an embodiment of the present invention.

FIG. 2 is a side view of the fluorescent lamp.

FIG. 3 is a plan view seen through a globe of the fluorescent lamp.

FIG. 4 is a development view of the bulb of the fluorescent lamp.

[Explanation of symbols]

 11 Fluorescent lamp 15 Arc tube 16 Lighting circuit

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Osamu Shirai 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo F-term in Toshiba Lighting & Technology Corporation (reference) 5C043 AA20 CC09 CD10 DD39 EB18 EC06

Claims (4)

[Claims] 1. An arc tube, which is enclosed in the arc tube and has a composition ratio of Bi: Pb: Sn: Hg = (38 to 46):
(15-19): (30-36): a main amalgam of (0.5-15). 2. The fluorescent lamp according to claim 1, wherein Hg has a mass% of 0.5 or more and less than 1.3. 3. The fluorescent lamp according to claim 1, wherein the mass% of Hg is 0.5 or more and less than 1.0. 4. A compact fluorescent lamp comprising: the fluorescent lamp according to claim 1; and a lighting circuit for lighting the fluorescent lamp.