Data recording device for camera and film type camera with lens
US5854950A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1997 |
| Grant date | Dec 29, 1998 |
| Priority date | — |
| Expiry date | Aug 13, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/246
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.