| 摘要 |
PURPOSE:To improve detection precision and to realize cost reduction by utilizing perforations of a film and detecting a position detection signal for film movement by infrared-ray LED phototransistor. CONSTITUTION:The LED phototransistors 12-16 incorporating LEDs and transistors (TR) in pairs are provided on the film contacting surface side of the film presser of a rear cover. Imprinted data such as a date and time, are inputted to a specific storage circuit. The TR12 outputs no signal right after photography and the TRs 13-16 output signals. Then, when the film is advanced, each TR output signal changes and 40 position signals are detected on a single advance. Those signals are outputted to a specific circuit to imprint the stored data at the timeing. Consequently, the detection precision is improved and the cost reduction is realized. |
