JPS5714828A - Electric charging completion display device for camera - Google Patents

Abstract

PURPOSE:To prevent wasteful photographing, and avoid giving anxiety at the blind exposure by forcibly disabling the charging completion display on the camera side when the voltage of a shutter driving battery has dropped or when the shutter speed during bling exposure is forcibly set. CONSTITUTION:When it comes to blind exposure period upon arriving of the number of photographing sheets at a prescribed number and a shutter speed is set at a prescribed high speed value, the switch SW1 of a camera A or the like is closed by way of a film sheet number plate. Then, a transistor 18 goes off, and the LED20 for display on the camera A side which lights in accordance with charging of a main capacitor 32 on the strobe side B is forcibly disabled and does not light irrespectively of the charging of the capacitor 32. Hence, the film winding by blind exposure for the purpose of removing the film is made without any anxiety feel. On the other hand, when the detected output of a comparator 15 inverts to a low level upon dropping of the voltage of a shutter driving battery, the transistor 18 turns off, and the LED20 is disabled in the same manner, whereby the wasteful photographing is prevented.