Patent ID: 6922528
Filing Date: 2005-07-26
Classification: G03B,H04N

Abstract:
1. A light emission control system for a flash device comprising: a plurality of photometering sensors for photometric measurements on different photometering zones; and a controller which outputs a periodic pulsed trigger signal for activating said flash device, and sequentially selects analog signals output from said plurality of photometering sensors to convert said analog signals into digital signals in sequence; wherein said controller outputs said pulsed trigger signal having a predetermined pulse frequency to perform a pre-flash emission operation in which said flash device is activated to discharge intermittently, and wherein said controller subsequently converts each of said analog signals into a corresponding one of said digital signals in sequence in accordance with each trigger pulse of said periodic pulsed trigger signal before performing a main flash emission operation in which said flash device is activated to discharge at a time of exposure.