JPS59149185U

JPS59149185U - lighting equipment

Info

Publication number: JPS59149185U
Application number: JP4412883U
Authority: JP
Inventors: 萩原　正記; 天野　信
Original assignee: 株式会社小糸製作所
Priority date: 1983-03-26
Filing date: 1983-03-26
Publication date: 1984-10-05

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図ａ、　　ｂは従来の照明装置の一例を示す断面図
および導光板の底面図、第２図は本考案に係る照明装置
に用いられる導光板の底面図、第３図は第２図■−■線
断面図である。１０・・・・・・導光板、１２・・・・・・光源、１３
・・・・・・第１点刻群、１４・・・・・・第２点刻群
、１５・・・・・・第３点刻群、１８・・・・・・表示
板。1A and 1B are a sectional view and a bottom view of a light guide plate showing an example of a conventional lighting device, FIG. 2 is a bottom view of a light guide plate used in the lighting device according to the present invention, and FIG. It is a sectional view taken along the line ■-■. 10...Light guide plate, 12...Light source, 13
...First stipple group, 14...Second stipple group, 15...Third stipple group, 18...Display board.

Claims

[Scope of utility model registration request]

In an illumination device that guides light from a light source to a light guide plate provided with a group of stipples and guides this light to a display board to illuminate the display board, a first group of stipples provided on the light guide plate and closer to the light source; The first dot engraving group includes a second dot engraving group provided at a position farther from the light source than the first dot engraving group, and a third dot engraving group provided between the first and second dot engraving groups. The group is controlled to have a smaller amount of reflected light than the second stipple group, and the third stipple group is formed to have a smaller stipple depth and diameter than the first and second stipple groups. Characteristic lighting equipment.