Headlight device having high voltage electric-discharge lamp

Details Headlight device having high voltage electric-discharge lamp Headlight device having high voltage electric-discharge lamp

1997-08-29

2000-06-06

Wong, Don

Electric lamp and discharge devices: systems

Special application

Vehicle

315 77, 362267, 362344, 307 108, B60Q 100, F21V 700

Patent

active

060722770

ABSTRACT:
A high voltage electric-discharge lamp is used as a light source of a headlight device for use in an automobile vehicle. Light from the discharge lamp is reflected on the curved surface of a reflector disposed at a back side of the discharge lamp, and projected forward. To reduce high frequency electromagnetic noises emitted forward from the device, which interfere with radios and televisions mounted on a vehicle driven ahead, a shade to intercept light emitted directly forward from the discharge lamp is disposed in front of the discharge lamp, and the shade is grounded. To further enhance noise reduction effects, a second grounding passage is provided. The second grounding passage is formed by grounding terminals attached to the shade and a wire connecting the terminals to the ground. Other components constituting the headlight device may be also grounded to secure a higher shielding effect. The electromagnetic noises interfering with radios and televisions mounted on a vehicle driving ahead are sufficiently reduced to a harmless level.

REFERENCES:
patent: 5343370 (1994-08-01), Ohashi et al.
patent: 5597232 (1997-01-01), Ohashi et al.
patent: 5611612 (1997-03-01), Choji et al.
patent: 5689157 (1997-11-01), Jitsukata et al.
patent: 5879073 (1999-03-01), Hori et al.

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