Photography – With data recording
Patent
1997-08-13
1998-12-29
Adams, Russell
Photography
With data recording
396318, G03B 1724
Patent
active
058549501
ABSTRACT:
A data recording device is provided which is capable of preventing the recording of incorrect date and time data on photographic film due to malfunction of the time counter that generates date and time data for recording. Drive IC 31A of data recording device 30 is equipped with time counter 161 that generates date and time data for recording, and the count value of the date and time data generated by this time counter is stored in storage circuit 33. At the point immediately prior to the operation that changes the count value of the time counter, the date and time data in storage circuit 33 and the counter value of the date and time data from the time counter are compared in comparison judgment circuit 34, and if the two do not agree, malfunction detection signal 34S which indicates that the time counter has malfunctioned is output to driver 162 and the recording of date and time data by liquid crystal display panel 12 is stopped. Therefore, the recording of incorrect date and time data on the photographic film can be reliably prevented.
REFERENCES:
patent: 4449805 (1984-05-01), Sakurada et al.
patent: 5258805 (1993-11-01), Aoki et al.
patent: 5606391 (1997-02-01), Aoki et al.
Akaiwa Masao
Handa Masaaki
Adams Russell
Janofsky Eric B.
Seiko Epson Corporation
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