CONTROLLING DEVICE OF BRIGHTNESS AT CAMERA

摘要

An automatic brightness control circuit for the date lamp for a camera comprises a lamp control circuit(1), a photo sensing circuit(2), and a lamp starting circuit(3). According to the light intensity emitted from the object, the impedance of a photosensor (Cds2) and the output of tr. (Tr6) for controlling the brightness of a lamp(L) is adjusted so that the date is printed with the proper brightness on the film.