Camera with data exposure function
First Claim
1. 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 lighting interval pulse for controlling at least lighting interval of said light emission devices based on a value counted by said counting portion;
a motor pulse cycle measuring portion for measuring a cycle 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 cycle measured by said motor pulse cycle 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.
1 Assignment
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Accused Products
Abstract
This invention provides a camera with a data exposure function comprising: a dot LED; a film winding mechanism provided with a film feeding motor; a film winding operation detecting portion for outputting a motor pulse signal corresponding to a rotation of the film feeding motor; a perforation detecting portion for detecting a perforation to output a perforation signal; and a main microcomputer for determining a lighting interval pulse by counting the number of motor pulses during detection of plural perforations, calculating a correction time corresponding to a decimal portion of the lighting interval pulse with reference to the cycle of a motor pulse signal and controlling a lighting interval of the dot LED based on an integer portion of the lighting interval pulse and correction time.
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Citations
15 Claims
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1. 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:
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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 lighting interval pulse for controlling at least lighting interval of said light emission devices based on a value counted by said counting portion;
a motor pulse cycle measuring portion for measuring a cycle 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 cycle measured by said motor pulse cycle 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A camera with a data exposure function comprising:
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a data exposure portion including plural light emission devices disposed in a direction perpendicular to a film feeding direction;
a film feeding portion for winding a film by a frame after exposure by controlling drive of a film feeding motor;
a motor pulse signal outputting portion for outputting a motor pulse signal corresponding to a rotation amount accompanied by the rotation of the film feeding motor;
a perforation detecting portions for detecting a perforation provided in the film to output a perforation signal;
a counting portion for counting the number of the motor pulse signals in a period in which particular two perforations are detected by the perforation detecting portion;
a determining portion for determining a lighting interval pulse for controlling a lighting interval of the light emission devices based on a value counted by the counting portion;
a correction time calculating portion for calculating a correction time corresponding to a decimal portion of the lighting interval pulse determined by the determining portion with reference to a cycle of the motor pulse signal; and
a control portion for exposing data relating to characters, numerals or symbols to the film by controlling a lighting interval of a light emission devices in the data exposure means, based on an integer portion of the lighting interval pulse determined by the determining portion and a correction time calculated by the correction time calculating portion. - View Dependent Claims (12, 13, 14)
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15. A data exposure method of 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:
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a step of outputting a motor pulse signal with a rotation of a film feeding motor;
a step of detecting a perforation provided in the film;
a step of counting the number of pulses of the motor pulse signal in an interval since a predetermined perforation is detected until a subsequent perforation is detected;
a step of measuring the cycle of the motor pulse signal;
a step of determining a lighting interval pulse for controlling a lighting interval of the light emission device based on the counted value;
a step of calculating a correction time corresponding to a decimal portion of the lighting interval pulse by calculating the decimal portion of the lighting interval pulse and the cycle of the motor pulse signal; and
a step of controlling the lighting interval of the light emission device using an integer portion of the determined lighting interval pulse and the correction time.
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Specification