JPS59143254A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To make difficult for fluorescent dye to be separated by applying the fluorecent dye after applying inorganic fine particles on the internal wall of the glass bulb of a fluorescent lamp. CONSTITUTION:After inorganic fine particles such as silica are applied on the internal wall of glass bulb 1, 1' or applied and baked, the fluorescent dye 3, 3' are applied thereon or applied and baked. As may be understood from the figure, since the fluorescent dye is applied on the uneven surface of inorganic fine particles, the surface area of fluorescent dye increases and since the fluorescent dye is applied on the uneven surface, the ultraviolet ray incoming from various angles can efficiently be converted into a visible light. Moreover, since inorganic fine particles are chemically active up to a considerable degree, they have large adhesive force to the fluorescent dye.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluorescent lamp structure for increasing the luminous efficiency of the fluorescent lamp.

The efficiency with which the ultraviolet light emitted in a fluorescent lamp is converted into visible light by fluorescent paint is about 40%, and the rest is converted into heat energy.

The present invention improves this point. Referring to the drawings, FIG. 1 shows a cross section of the fluorescent lamp, and FIG. 2 is an enlarged view of the main part of the cross section.

The inner walls of the glass tubes 1 and 1' are coated with inorganic fine particles such as silica, or coated and fired, and then fluorescent paints 3 and 3' are coated or coated and fired.

In conventional fluorescent lamps, fluorescent paint was applied directly to the glass tube wall, resulting in a flat surface with no irregularities.In contrast, the present invention uses an inorganic material as shown in Figure 2. The surface area of the fluorescent paint is increased because the fluorescent paint is applied on top of the unevenness caused by fine particles, and because the fluorescent paint is applied on the uneven surface, it efficiently converts ultraviolet rays incident from various angles into visible light. Can be converted. Furthermore, since inorganic fine particles have high chemical activity, they have a strong adsorption power with fluorescent paint.

Because the present invention has the above-mentioned structural and chemical characteristics, the luminous efficiency increases and becomes brighter, and the fluorescent paint becomes difficult to peel off, so there is no problem with conventional fluorescent paint peeling. An effect that is not produced appears.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the fluorescent lamp, and FIG. 2 is an enlarged view of the main part of FIG. ■, 1' is a glass tube, 2, 2' are inorganic fine particles, 3,
3' is a fluorescent paint. Patent applicant Shigeo Yoshino

Claims (1)

[Claims] A fluorescent lamp with a structure in which the inner wall of the glass tube of the fluorescent lamp is coated with inorganic fine particles and then coated with fluorescent paint.