Device for the control of the luminous flux from a main beam bul

Details Device for the control of the luminous flux from a main beam bul Device for the control of the luminous flux from a main beam bul

1981-05-20

1983-10-04

La Roche, Eugene

Electric lamp and discharge devices: systems

Special application

Vehicle

315 83, 315130, 315313, 315294, 315360, 307 10LS, B60Q 102

Patent

active

044081421

ABSTRACT:
A device for causing the luminous flux from a main beam bulb (8) to fall gradually when the headlights are switched to dipped beam. The current to the dipped beam bulb is made to control a control circuit (6) which will gradually reduce the current supply to the main beam bulb (8). The control circuit incorporates an oscillator (65) which causes a counting chain (66a-66d) to advance. This activates a diode matrix (68) which is arranged so as to control the main beam bulb (8) via a shift register (69). The positioning of the diodes in the diode matrix will determine the shape of the dimming curve for the luminous flux.

REFERENCES:
patent: 3784874 (1974-01-01), Barrett et al.

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