Electromagnetically shielded discharge-type headlamp
AssigneeKoito Manufacturing Co., Ltd.
InventorsAkiyosi Ozaki, Toichiro Shiozawa, Kazuyoshi Suzuki
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Abstract
An automotive headlamp capable of effectively shielding the electromagnetic waves generated by the discharge lamp of a light source and peripheral portions. A conductive layer for shielding electromagnetic waves, which is composed of a durable metallic plating layer, is provided on the surface of the lamp body of the headlamp. With such a shielding layer, a good electromagnetic shielding effect is obtained a long period of time.
Claims5
In a headlamp for automobile use having a discharge bulb as a light source and a lamp body which is coated with a conductive layer for preventing electromagnetic waves from escaping from the headlamp, the improvement wherein the conductive layer comprises a metal plating layer, wherein said lamp body is made of a thermoplastic resin and wherein said thermoplastic resin is a resin material selected from the group consisting of a polycarbonate/acrylonitrile butadiene styrene alloy mixed with glass fiber, denatured maleimide mixed with glass fiber, and nylon mixed with glass fiber such that said thermoplastic resin has a coefficient of linear expansion close to that of said metal plating layer.
In a headlamp for automobile use having a discharge bulb as a light source and a lamp body which is coated with a conductive layer for preventing electromagnetic waves from escaping from the headlamp, the improvement wherein the conductive layer comprises a metal plating layer, wherein said lamp body is made of a thermoplastic resin and wherein said thermoplastic resin is a material selected from the group consisting of denatured maleimide, and nylon mixed with a material selected from the group consisting of alumifisker, mica and talc such that said thermoplastic resin has a coefficient of linear expansion close to that of said metal plating layer.
Dependencies are inferred from the claim text.