Light emitting element

Details Light emitting element Light emitting element

1997-08-22

1999-01-19

Perkey, W. B.

Photography

With data recording

Optical

G03B 1724

Patent

active

058624210

ABSTRACT:
An apparatus for imprinting data on a traveling film surface by utilizing a seven-segment light emitting element, comprises a film winding mechanism including a film feeding motor. A film feeding control device controls the film feeding mechanism to wind up one frame of the film after an exposure operation has finished. A pulse signal output device outputs pulse signals in accordance with the rotation of the motor. A perforation detecting portion detects a perforation and outputs a perforation signal. A PI counter counts the number of the pulse signals outputted between the detection of first and second perforation signals. A determining device determines light emitting intervals for the present imprinting operation based on the number of the pulse signals counted at the time of the preceding one-frame winding.

REFERENCES:
patent: 5422694 (1995-06-01), Yoshida et al.

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