Patent ID: 6477331
Filing Date: 2002-11-05
Classification: G03B

Abstract:
A camera with a data exposure function for exposing data relating to characters, numerals or symbols by lighting a plurality of light emission devices interlockingly with a film feeding operation, comprising:a film feeding motor; a motor pulse signal output portion for outputting a motor pulse signal according to rotation of said film feeding motor; a perforation detecting portion for detecting a perforation provided in said film to output a perforation signal; a counting portion for counting the number of motor pulse signals generated after a perforation is detected by said perforation detecting portion until another perforation is detected; a determining portion for determining a lighting interval pulse for controlling at least a lighting interval of said light emission devices based on a value counted by said counting portion; a motor pulse period measuring portion for measuring a period of said motor pulse signal; a correction time calculating portion for calculating a correction time corresponding to a decimal portion of said lighting interval pulse based on the decimal portion of said lighting interval pulse and a motor pulse period measured by said motor pulse period measuring portion; and a control portion for controlling a lighting interval of said light emission devices using an integer portion of the lighting interval pulse determined by said determining portion and the correction time calculated by said correction time calculating portion.