| 摘要 |
A data-imprinting apparatus for preventing the imprinting of incorrect dates in a lens-equipped film unit that lacks a monitor display unit for the confirmation of the date display. The lens-equipped film unit 1 contains a built-in data module 27 that lacks an external display unit that allows the confirmation of the date display from the outside. The data module 27 contains a transmission-type liquid crystal display unit 45 that automatically updates and displays dates based upon a pre-stored calendar. In the liquid crystal display unit 45, external light enters from the light collection window 15 on the front cover 12, thus creating a beam of data light. The data light, acting in concert with the shutter release operation, is guided into a dark box. The image-forming optical system that is provided in the dark box forms an image of the data light on a part of the photographic film. When a temporary disruption of the power supply from the battery 70 occurs due to vibrations, for example, the power supply monitoring circuit 75 that is incorporated in the data module 27 detects the event, transmits the off-mode signal to the LCD driver 73, and causes the display on the liquid crystal display unit 45 to enter into a non-display state.
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