JPS63128586U

JPS63128586U -

Info

Publication number: JPS63128586U
Application number: JP2000887U
Authority: JP
Priority date: 1987-02-16
Filing date: 1987-02-16
Publication date: 1988-08-23

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例を示す断面図、第
２図は本考案の第２実施例を示す断面図、第３図
は本考案の第３実施例を示す断面図、第４図は本
考案の第４実施例を示す断面図、第５図および第
６図は照明装置の従来例を示す分解斜視図および
断面図、第７図は従来装置における欠点を説明す
るための図である。２……ケース、３……表示板、４，４Ａ，４Ｂ
……光源、５，５Ａ〜５Ｄ……導光板、６，６Ａ
〜６Ｄ……点刻、７……表示部、１７Ａ，１７Ｂ
，１８Ａ，１８Ｂ，１９Ａ，１９Ｂ，２０……点
刻、３１，３２，３３……点刻（又は線刻）、Ａ
……主照明領域。 Fig. 1 is a sectional view showing a first embodiment of the invention, Fig. 2 is a sectional view showing a second embodiment of the invention, Fig. 3 is a sectional view showing a third embodiment of the invention, and Fig. 4 is a sectional view showing a third embodiment of the invention. The figure is a sectional view showing a fourth embodiment of the present invention, FIGS. 5 and 6 are exploded perspective views and sectional views showing a conventional lighting device, and FIG. 7 is a diagram for explaining the drawbacks of the conventional device. It is. 2...Case, 3...Display board, 4, 4A, 4B
...Light source, 5,5A to 5D...Light guide plate, 6,6A
~6D...Stippling, 7...Display section, 17A, 17B
, 18A, 18B, 19A, 19B, 20...Stippling, 31, 32, 33...Stippling (or line engraving), A
...Main lighting area.

Claims

[Scope of utility model registration request]

In the lighting device, a light guide plate is provided on the back side of the display board, and the light guide plate guides the light emitted from the light source to the display board for back illumination. Consisting of multiple flat light guide plates, the main illumination area on the back side of each light guide plate has a high density of dots or lines that reflect light toward the front side, and the surrounding area has low density dots. Or a lighting device characterized by providing a line inscription.