JPH0470540U

JPH0470540U -

Info

Publication number: JPH0470540U
Application number: JP1990113528U
Authority: JP
Priority date: 1990-10-31
Filing date: 1990-10-31
Publication date: 1992-06-23

Description

[Brief explanation of the drawing]

添付図面は本考案に係る灯具の一実施例を示し
、第１図は自動車の室内灯に使用した例の断面図
、第２図は点灯回路および加熱回路の電気回路図
、第３図はリレースイツチ駆動出力のブロツク図
、第４図は熱変色塗料塗布薄板の説明図、第５図
は熱変色塗料塗布薄板の変形例を示した説明図、
第６図は透明電熱体の説明図である。１……ハウジング、２……レンズ、３４……光
源バルブ、４……受光素子、５……熱変色塗料塗
布薄板（熱変色塗料層）、６……透明電熱体、７
……電気回路基板（開閉部）。 The attached drawings show an embodiment of the lighting device according to the present invention, and FIG. 1 is a sectional view of an example used for an interior light of an automobile, FIG. 2 is an electric circuit diagram of a lighting circuit and a heating circuit, and FIG. 3 is a relay. A block diagram of the switch drive output, Fig. 4 is an explanatory diagram of a thin plate coated with thermochromic paint, and Fig. 5 is an explanatory diagram showing a modification of the thin plate coated with thermochromic paint.
FIG. 6 is an explanatory diagram of the transparent electric heating element. DESCRIPTION OF SYMBOLS 1... Housing, 2... Lens, 34... Light source bulb, 4... Light receiving element, 5... Thin plate coated with thermochromic paint (thermochromic paint layer), 6... Transparent electric heating element, 7
...Electric circuit board (opening/closing part).

Claims

[Scope of Claim for Utility Model Registration] A light source bulb disposed within a lamp chamber defined by a housing and a lens, and a light source disposed in the lens that is colored and non-transparent at room temperature and light transmissive at high temperature. In a lamp equipped with a reversible thermochromic paint layer that is in a state of A lamp comprising: an opening/closing section that opens and closes a circuit of the electric heating body in a predetermined set light transmittance range through the light receiving element.