JPS6276105A - Fluorescent illumination 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 [Field of the Invention] The present invention relates to a lighting lamp using a fluorescent lamp, and more particularly to a thin fluorescent lighting lamp that is attached to an indoor ceiling.

[Background of the invention]

There are two types of fluorescent lighting lamps that are installed on indoor ceilings: recessed and direct-mounted.In stores, etc., the ceiling space is small, so it is advantageous to design fluorescent lighting with a thin design. When directly attached, it is desirable to design fluorescent lighting to be thin in order to create a space that feels less oppressive. However, if the lamp is designed to be thin, the fluorescent lamp becomes visible through the lamp cover, which is unsightly, and there is also the problem of non-uniform distribution of light.

For this reason, panels made of milky-white acrylic resin mixed with a white substance were used in Europe as lamp covers.

This distributed the light uniformly and eliminated the lamp image, but the efficiency of light utilization decreased and the problem of darkness occurred.

In order to eliminate the lamp image and increase the efficiency of light utilization, the outer surface of the transparent panel was formed as a dense body of triangular pyramids with regular triangular bases or quadrangular pyramids with square bases. This improved the efficiency of light use, but the expansion and disappearance of the lamp image was not satisfactory.

[Purpose of the invention]

An object of the present invention is to provide a thin fluorescent lighting lamp that eliminates the lamp image and has high light utilization efficiency.

The purpose of this is to form the outer surface of the prism/Q channel in the form of a densely packed square pyramid with a diamond-shaped bottom according to the present invention, align the longitudinal direction of the rhombus with the longitudinal direction of the straight tube fluorescent lamp, and align the prism/Q channel with the opening of the lamp body. This is achieved through fluorescent lighting.

〔Example〕

Embodiments of the fluorescent lighting lamp of the present invention will be described in detail below with reference to the accompanying drawings.

Figure 1 is a side view of a fluorescent lighting lamp with the side surface of the lamp body partially destroyed to show the internal structure. A reflector is shown.

Figure 2 is a plan view of the fluorescent lighting lamp as seen from the prism panel side, and Figure 2a is the prism panel. This is an enlarged view of a portion of the flannel, which is formed as a densely packed quadrangular pyramid with a rhombic base. As is clear from FIGS. 2 and 2a, the prism panel is arranged in the opening of the lamp body with the longitudinal direction of the rhombus aligned with the longitudinal direction of the straight tube fluorescent lamp 1.

Figures 3 and 4 are plan views of part of a conventional prism panel corresponding to Figure 2a. Figure 3 is a densely packed square pyramid with a square base, and Figure 4 is an equilateral triangular base. Prism panels are shown each having an outer surface formed as a dense body of triangular pyramids. A quadrangular pyramidal prism has a square base, so its ability to magnify the lamp image is small, and a triangular pyramidal prism has one of its three sides shining strongly directly under the lamp, impairing the uniformity of the light distribution. .

Comparing the brightness ratio, which indicates the uniformity of illumination, it is 3 to 5 for conventional prism panels, but it has been improved to 1.1 for the rhombic square pyramid prism panel, and the pyramid has a square bottom with an apex angle of 60 degrees. (Angle of 1/2 of the base of the pyramid: 45 degrees: see Figure 3) A square pyramid with a rhombic base with an apex angle of 60 degrees (Angle of 1/2 of the base of the pyramid: 30 degrees: (See Figure 2a) When compared with a square pyramid, 2.
The separation distance d of the 0 lamp image (the shaded area in FIG. 2) is approximately twice as large in the case of the rhomboid square pyramid as in the case of the square pyramid.

〔Effect of the invention〕

According to the present invention, even if the distance between the fluorescent lamp and the prism panel is reduced to make the illumination lamp thin, the lamp image can be virtually eliminated without reducing the light utilization efficiency, and the uniformity of the light distribution can be guaranteed. It became possible.

[Brief explanation of drawings]

FIG. 1 is a side view showing the inside of a fluorescent lighting lamp with a side surface partially broken away. FIG. 1a is an enlarged cross-sectional view of the circular portion indicated by the dashed line in FIG. 1. FIG. FIG. 2 is a plan view of the fluorescent lighting lamp as seen from the prism panel side. FIG. 2a is an enlarged view of the dashed circular portion of FIG. Figure 3 and Figure 1 are the conventional full-length jets corresponding to Figure 2a.
It is a partial diagram of the Zum Q-nel. In the diagram: 1... Fluorescent lamp, 2... Lamp body, 3... Prism/9 channels, 4...
...Reflector, d...Separation distance, Zj -z/1...Directly below the lamp: longitudinal direction of the lamp,
z2- z/2...Lamp middle. Patent Applicant Toshiba Denzai Mashiki Company Agent Patent Attorney Tatsuo Ito Agent Patent Attorney Satoshi Ito
Ceremony) 6゜February 5, 1986 Director General of the Patent Office
7゜1, Indication of the case 1985 Patent Application No. 2152262, Name of the invention Fluorescent illumination lamp 3.711i Relationship with the case Patent applicant Location 4-28 Mita 1-chome, Minato-ku, Tokyo Title (3)
75) Toshiba Electric Materials Co., Ltd. Representative T8 Tsutomu Oo 4, Agent 105 Address Toranomon Electric Building, 2-8-1 Toranomon, Minato-ku, Tokyo Telephone: (501) 9370 Target of amendment “Drawings” Contents of amendment Attachment Replace the drawing as shown.

Claims (1)

[Claims] It is equipped with a straight tube fluorescent lamp, a lamp body that accommodates the fluorescent lamp, and a prism panel that is attached to the opening of the lamp body. A fluorescent lighting lamp characterized by a prism panel arranged to match the longitudinal direction of the fluorescent lamp.