JPS6049551A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To enable luminous color to be changed by installing a partition plate fused to a stem inside an outer tube, applying a red and a blue phosphor respectively on the two areas of the inner surface of the outer tube located on either side of the partition plate and applying a green phosphor to both surfaces of the partition plate. CONSTITUTION:A partition plate 4 made of a stainless steel or the like is fused almost to the center of a stem before the thus obtained body is installed in an outer tube 1; the angle between the stem surface and the partition plate 4 can be changed by means of an external magnetic field. Next, electrodes 5a and 5b are installed on either side of the partition plate 4 to form a discharge path passing through the internal top area of the outer tube 1. Then both surfaces of the partition plate 4 are coated with a green phosphor 2G. Next, the inner surface of the outer tube 1 excluding the top area is divided in two, the two side located on either side of the partition plate 4. After that, a red phosphor 2R is applied to one of the divided areas and a blue phosphor 2B is applied to the other area, thereby constituting a small fluorescent lamp. Because of the above constitution, the lamp can be caused to emit white color by vertically positioning the partition plate 4. The lamp can be caused to emit daylight color by slanting the partition plate 4 toward the red phosphor 2R. It can be caused to emit incandescent lamp color by slanting the plate 4 toward the blue phospher 2B.

Description

Detailed Description of the Invention (Technical Field) The present invention stores a partition plate in a discharge space formed by an outer tube and a stem, and uses the space formed by the partition plate and the outer tube as a discharge path. Introduction to compact fluorescent lamps.

(Background technology) In recent years, in the background of energy saving, S
IT Efficiency 1 Utilizing the principle of fluorescent lamps, which have the great advantage of long life, there is active research into fluorescent lamps with a compact structure that can replace incandescent light bulbs, which have fatal shortcomings of low efficiency and short life. is being carried out.

In line with this trend, the applicant of the present application divides the discharge space airtightly formed by the outer tube and the stem into approximately two halves by using a partition plate hanging down from the stem, with a gap between the top of the outer tube and the top of the outer tube. 2] In a fluorescent rung in which a pair of electrodes are arranged on both stem sides that can be split, and a discharge is generated between the two electrodes through the above-mentioned gap at the top, the fluorescent lamp is placed on the inner wall of the outer tube except for a part of the top. We have proposed a fluorescent lamp that is characterized by being coated with a luminous material.

Such fluorescent lamps have sharp light distribution characteristics, so
It is possible to provide a long-life lamp suitable for illumination requiring directivity such as a spotlight.

(Objective of the Invention) An object of the present invention is to provide a fluorescent lamp which has sharp light distribution characteristics as described above and further has variable emission color.

(Disclosure of the Invention) FIG. 1 is a perspective view showing an embodiment of a fluorescent lamp according to the present invention, and FIG. 2 is a sectional view thereof. In the figure, reference numeral 1 denotes an outer tube made of a light-transmitting material such as glass, and two types of phosphors 2 are coated on the inner side of the outer tube, excluding the top, so as to divide the inner wall surface of the outer tube into approximately two halves; is a red phosphor 2R, such as Y2O, :Eu, and the other is a red phosphor 2R, such as B'' f!qAL.
, 10sy "E" blue phosphor 2B.

Reference numeral 3 denotes a disc-shaped stem, and the periphery of the opening of the outer tube 1 is sealed with an adhesive such as a thick glass frit. 4 is a partition plate made of stainless steel, for example, and the direction of the image is Mg.
A4+O+y: A green phosphor 2G such as C6, rb is coated, and the lower end of the partition plate 4 is hinged to the approximate center of the stem 3, and the external magnetic field (not shown) forms a line with the stem surface. It is configured so that the angle can be changed. 5aS5
A pair of electrodes b are disposed on both sides of the partition plate 4, and are constructed by supporting a filament 7 on an encapsulated wire 6 that is encapsulated via a stem 3.

8 is a cap, and 9 is a cap pin. The space airtightly formed by the outer tube 1 and the stem 3 is evacuated and evacuated and filled with mercury and discharge gas, as in a normal fluorescent lamp.

When a fluorescent lamp with such a configuration is lit using a normal lighting device, a discharge path is formed between the two electrodes 5a15b via the partition plate 4, and the amount of evaporated mercury in the discharge space is transferred to the coldest part of the outer bulb 1. controlled by

Next, the operation of the present invention will be explained with reference to FIG. First, as shown in FIG.
After multiple reflections within the tube, it is emitted from the phosphor-free area at the top of the outer tube. Therefore, white light is emitted from the top of the outer tube. Next, when the partition plate 4 is tilted to the side coated with the red phosphor 2R as shown in the same figure (aJ), a mixed color of blue and green,
In other words, daylight white light is emitted from the top of the outer tube. Furthermore, when the partition plate 4 is tilted toward the side coated with the blue phosphor 2B as shown in FIG.
A spherical light is emitted from the top of the outer tube.

In this way, by changing the angle formed by the partition plate 4 and the stem 3 using means such as an external magnetic field, the top of the outer tube emits light that continuously changes color between "daylight white - white - incandescent light bulb color". radiated.

(Effects of the Invention) As described above, the present invention applies a green phosphor to the partition plate,
Excluding the top of the inner wall surface of the outer tube, the red phosphor and blue phosphor are painted separately at the part where the partition plate is attached, and the partition plate is made tiltable, so that the phosphor is not coated on the top of the outer tube. It is possible to provide a fluorescent lamp that can emit light that continuously changes color from white to white to incandescent light.

[Brief explanation of drawings]

Figure NSh is a perspective view showing one embodiment of the present invention, Figure 2 is a sectional view of the same, and Figure 3 (ar, tb+, (11 is a sectional view explaining the operation of the above embodiment. ... Outer tube, 2... Fluorescent body, 8... Stem, 4...
...Partition plate, 5a, 5b...11 Patent applicant Matsushita Electric Works Co., Ltd. Representative Patent Attorney Satoshi Takemoto (and 2 others)

Claims (1)

[Claims] (1) The discharge space airtightly formed by the outer tube and the stem is divided into approximately two parts by a partition plate whose one end is attached to the stem, with a gap between the top of the outer tube and the two stem sides. In this fluorescent lamp, a pair of electrodes are disposed at the top of the lamp, and a discharge is caused between the two electrodes through the gap at the top of the lamp. 1. A fluorescent lamp characterized in that a red phosphor and a blue phosphor are painted separately with a partition plate as a border.