Title: Digital brightness control system

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.

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Other info:

Inventors: Renner, Karl H. (Dallas, TX, US)
Williams, Clark Russell (Plano, TX, US)

Application Number: 710524
Filing Date: 1976-08-02
Publication_date: 1978-09-19
Assignee: Texas Instruments Incorporated (Dallas, TX)
Primary Class(es): 368/68 315/156, 345/46, 345/690, 368/83, 968/928, 968/DIG1
Other Classes:
US Patent Ref:

3027491	Mar, 1962	Seidler	250/214.
3573788	Apr, 1971	Molnaz	340/335.
3866406	Feb, 1975	Roberts	58/58.
3941926	Mar, 1976	Slobadzian	340/335.

Other Refs:
Primary Examiner: Jackmon, Edith S.
Assistant Examiner:
Attorney: Grossman; Rene'E., Sadacca; Stephen S.