Lamp illumination adjusting apparatus

Details Lamp illumination adjusting apparatus Lamp illumination adjusting apparatus

1987-03-13

1988-09-20

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

307 10R, 307106, 315241P, 315151, 318341, 318139, 340 52R, 340 81R, H03K 300, H05B 3904

Patent

active

047728051

ABSTRACT:
A lamp illumination adjusting apparatus for automobiles comprises a reference triangular wave generator, an adjusting voltage setting circuit, a comparator to compare the reference triangular signal with the adjusting voltage and to output comparison signal, a driver circuit including a MOS field effect transistor which is controlled directly by the comparison signal, and a lamp which is connected in series to the driver circuit and interposed between a power source terminal and the ground.

REFERENCES:
patent: 3780340 (1973-12-01), Munro
patent: 4004188 (1977-01-01), Cooper
patent: 4020361 (1977-04-01), Suelzle et al.
patent: 4117453 (1978-09-01), Hodgson et al.
patent: 4156166 (1979-05-01), Shapiro et al.
patent: 4275335 (1981-06-01), Ishida
patent: 4309639 (1982-01-01), Thrower et al.
patent: 4373146 (1983-02-01), Bonazoli et al.
patent: 4443741 (1984-04-01), Tanaka et al.
patent: 4458183 (1984-07-01), Neilson
patent: 4599548 (1986-07-01), Schultz
patent: 4623824 (1986-11-01), Scolari et al.
patent: 4634933 (1987-01-01), Kamon et al.

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