Digital brightness control system

Details Digital brightness control system Digital brightness control system

1976-08-02

1978-09-19

Jackmon, Edith S.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Plural load device systems

58 23R, 315156, 340335, G04B 1930, G04C 300, H05B 3702, H05B 3904

Patent

active

041143663

ABSTRACT:
A digital light-sensing control system for use in light sensitive equipment, such as a digital watch or a camera, is comprised of light sensor means such as a photo resistor, a digital brightness detector, and brightness control logic. The light sensor means produces analog signals which vary with ambient light intensity. The digital brightness detector selectively digitizes the analog signals to generate digital brightness signals. The brightness control logic generates system control signals in response to the digital brightness signals. Several embodiments of the digital brightness detector and the brightness control logic are disclosed. Each embodiment is capable of being integrated on a single semiconductor substrate.

REFERENCES:
patent: 3027491 (1962-03-01), Seidler
patent: 3573788 (1971-04-01), Molnaz
patent: 3866406 (1975-02-01), Roberts
patent: 3941926 (1976-03-01), Slobadzian

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