Electric lamp and discharge devices: systems – Special application – Vehicle
Patent
1981-11-17
1983-06-14
Dixon, Harold A.
Electric lamp and discharge devices: systems
Special application
Vehicle
315 82, 315313, 315363, H01K 700
Patent
active
043885586
ABSTRACT:
A display intensity control apparatus for controlling under dark ambient conditions the display intensity of an automobile display system comprises a plurality of display units (e.g., LED, FLT, Lamp) for providing displays effected by display elements of different types. Under dark ambient conditions, a pulse signal with a predetermined duty ratio is generated at a predetermined frequency and the display intensity of selected one of the display units is decreased in accordance with the duty ratio. Simultaneously, the duty ratio of the pulse signal is changed, and the display intensities of the other display units are decreased in accordance with the changed duty ratio.
REFERENCES:
patent: 4029991 (1977-06-01), Schultz
Hagisato Yasuo
Mizuno Tooru
Dixon Harold A.
Nippondenso Co. Ltd.
Toyota Jidosha Kogyo Kabushiki Kaisha
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