Photographic camera including a memory for storing adjustment data and a means for adjusting functions of the camera based on the stored adjustment data

Claim 2

A photographic camera, comprising: a first memory for storing an exposure time to be controlled as a logarithmically compressed digital value; a second memory constituted by an EEPROM and adapted for storing adjustment data as a digital value corresponding to an actual time; logarithmic compression means for outputting a logarithmically compressed adjustment amount by using the digital value read from said first memory and the adjustment data read from said second memory; adjustment means for calculating an adjustment exposure time value from the digital value read from said first memory and also from the adjustment amount output by said logarithmic compression means; and shutter control means, including, a shutter, logarithmic expansion means for expanding the adjustment exposure time value calculated by said adjustment means into an actual time unit to obtain an actual adjustment exposure time value, and control means for controlling said shutter based on the actual adjustment exposure time value.

Claim 3

A photographic camera, as defined in claim 1, wherein said logarithmic compression means obtains the adjustment amount (ΔTV) from the following equation ΔTV=log.sub.2 (1+Δts 2.sup.TV) in which Δts denotes the adjustment data read from said second memory and TV denotes the digital value read from said first memory.

Claim 4

A photographic camera comprising: light measuring means including; light measuring circuit for generating analog information corresponding to brightness of an object to be photographed, and an A/D converter for converting the analog information into digital information; an EEPROM for storing digital adjustment data for the adjustment of a digital output of said A/D converter; adjustment means for obtaining an adjusted object brightness value BVo' from the digital output of said A/D converter and from the digital adjustment data from said EEPROM; wherein said adjustment means calculates the adjusted object brightness value BVo' from the following equation: BVo'=m·BVo+n in which, BVo denotes the digital information from said A/D converter of said light measuring circuit and m and n denote the digital adjustment data stored in said adjustment data memory; and exposure control means for controlling an exposure based on the adjusted object brightness value.

Claim 5

A photographic camera comprising: light measuring means including; light measuring circuit for generating analog information corresponding to brightness of an object to be photographed, and an A/D converter for converting the analog information into digital information; an EEPROM for storing digital adjustment data for the adjustment of a digital output of said A/D converter; adjustment means for obtaining an adjusted object brightness value BVo' from the digital output of said A/D converter and from the digital adjustment data from said EEPROM; wherein said adjustment means calculates the adjusted object brightness value BVo' from the following equation: BVo'=m·BVo+n in which, BVo denotes the digital information from said A/D converter of said light measuring circuit and m and n denote the digital adjustment data stored in said adjustment data memory; and exposure control means for controlling an exposure based on the adjusted object brightness value.

Claim 6

A photographic camera comprising: light measuring means, including; light measuring circuit for generating analog information corresponding to brightness of an object to be photographed, and an A/D converter for converting the analog information into digital information; an adjustment data memory for storing digital adjustment data for the adjustment of a digital output of said A/D converter; adjustment means for obtaining an adjusted object brightness value BVo' from the digital output of said light A/D converter and from the digital adjustment data from said adjustment data memory; wherein said adjustment means calculates the adjusted object brightness value BVo' from the following equation: BVo'=m·BVo+n in which, BVo denotes the digital information from said A/D converter of said light measuring circuit and m and n denote the digital adjustment data stored in said adjustment data memory; and exposure control means for controlling an exposure based on the adjusted object brightness value.

Claim 7

A photographic camera comprising: light measuring means, including; light measuring circuit for generating analog information corresponding to brightness of an object to be photographed, and an A/D converter for converting the analog information into digital information; an adjustment data memory for storing digital adjustment data for the adjustment of a digital output of said A/D converter; adjustment means for obtaining an adjusted object brightness value BVo' from the digital output of said light A/D converter and from the digital adjustment data from said adjustment data memory; wherein said adjustment means calculates the adjusted object brightness value BVo' from the following equation: BVo'=m·BVo+n in which, BVo denotes the digital information from said A/D converter of said light measuring circuit and m and n denote the digital adjustment data stored in said adjustment data memory; and exposure control means for controlling an exposure based on the adjusted object brightness value.

Claim 8

A photographic camera, as defined in claim 4, wherein said A/D converter is constituted by a double integral type A/D converter circuit.

Claim 9

A photographic camera system having light emission control means for controlling a flash light emission amount, comprising: an electronic flash device; a film speed memory for storing film speed information of a film in use; an adjustment data memory for storing digital adjustment data for adjustment of a flash light emission amount of said light emission control means; adjustment means for obtaining an adjusted film speed value SV' from the film speed information stored in said film speed memory and also from the adjustment data stored in said adjustment data memory; and light emission control means, including: light receiving means for receiving light reflected from an object to be photographed and then for generating an electric signal corresponding to an amount of light received, a D/A converter for converting the adjusted film speed value provided by said adjustment means into an analog signal, and a light emission control circuit for generating a light emission stop signal and outputting said stop signal to said electronic flash device when it is detected based on the electric signal from said light receiving means and on the analog signal from said D/A converter that an amount of light reflected from the object has reached a predetermined value.

Claim 10

A photographic camera system having light emission control means for controlling a flash light emission amount, comprising: an electronic flash device; a film speed memory for storing film speed information of a film in use; an adjustment data memory for storing digital adjustment data for adjustment of a flash light emission amount of said light emission control means; adjustment means for obtaining an adjusted film speed value SV' from the film speed information stored in said film speed memory and also from the adjustment data stored in said adjustment data memory; and light emission control means, including: light receiving means for receiving light reflected from an object to be photographed and then for generating an electric signal corresponding to an amount of light received, a D/A converter for converting the adjusted film speed value provided by said adjustment means into an analog signal, and a light emission control circuit for generating a light emission stop signal and outputting said stop signal to said electronic flash device when it is detected based on the electric signal from said light receiving means and on the analog signal from said D/A converter that an amount of light reflected from the object has reached a predetermined value.

Claim 11

A photographic camera system, as defined in claim 6, wherein said adjustment data memory is constituted by an EEPROM.

Claim 12

A photographic camera system, as defined in claim 6, wherein said adjustment means calculates the adjusted film speed value SV' from the following equation: SV'=i·SV+j in which SV denotes a film speed value stored in said film speed memory and i and j denote the digital adjustment data stored in said adjustment data memory.

Claim 13

A photographic camera system, as defined in claim 6, wherein said light emission control means further includes, adding means for adding the electric signal from said light receiving means to the analog signal from said D/A converter, and wherein said light emission control circuit, includes, charging means having a capacitor which is charged with electric current corresponding to the signal output from said adding means, and comparator means for comparing an actual charged level of said capacitor with a predetermined level and then for generating the light emission stop signal when the actual charged level of the capacitor has reached the predetermined level.

Claim 14

A photographic camera system, comprising: a photographic lens; an electronic flash device; light measuring means for measuring brightness of an object to be photographed and then for generating light measurement data; focus detecting means for detecting a focus condition of said photographic lens and for calculating a focus displacement amount; film speed information input means for receiving film speed information; exposure time calculating means for calculating an exposure time based on the light measurement data of said light measuring means and on the film speed information from said film speed information input means; light emission control means for receiving light reflected from said object and for generating a signal for controlling a light emission amount of said electronic flash device; an adjustment data memory constituted by an EEPROM for storing a first adjustment data for adjustment of the light measurement data, a second adjustment data for adjustment of the focus displacement amount, a third adjustment data for adjusting the exposure time and a fourth adjustment data for adjustment of the light emission amount; first adjustment means for adjusting the light measurement data by using the first adjustment data stored in said adjustment data memory; second adjustment means for adjusting the focus displacement amount by using the second adjustment data stored in said adjustment data memory; third adjustment means for adjusting the exposure time by using the third adjustment data stored in said adjustment data memory; and fourth adjustment means for adjusting the light emission amount by using the fourth adjustment data stored in said adjustment data memory.

Claim 15

A photographic camera system, comprising: a photographic lens; an electronic flash device; light measuring means for measuring brightness of an object to be photographed and then for generating light measurement data; focus detecting means for detecting a focus condition of said photographic lens and for calculating a focus displacement amount; film speed information input means for receiving film speed information; exposure time calculating means for calculating an exposure time based on the light measurement data of said light measuring means and on the film speed information from said film speed information input means; light emission control means for receiving light reflected from said object and for generating a signal for controlling a light emission amount of said electronic flash device; an adjustment data memory constituted by an EEPROM for storing a first adjustment data for adjustment of the light measurement data, a second adjustment data for adjustment of the focus displacement amount, a third adjustment data for adjusting the exposure time and a fourth adjustment data for adjustment of the light emission amount; first adjustment means for adjusting the light measurement data by using the first adjustment data stored in said adjustment data memory; second adjustment means for adjusting the focus displacement amount by using the second adjustment data stored in said adjustment data memory; third adjustment means for adjusting the exposure time by using the third adjustment data stored in said adjustment data memory; and fourth adjustment means for adjusting the light emission amount by using the fourth adjustment data stored in said adjustment data memory.

Claim 16

A photographic camera system, comprising: a photographic lens; light measuring means for measuring brightness of an object to be photographed and then for generating light measurement data; focus detecting means for detecting a focus condition of said photographic lens and for calculating a focus displacement amount; film speed information input means for receiving film speed information; exposure time calculating means for calculating an exposure time based on the light measurement data of said light measuring means and on the film speed information from said film speed information input means; light emission control means for receiving light reflected from said object and for generating a signal for controlling a light emission amount of said electronic flash device; an adjustment data memory constituted by an EEPROM for storing a first adjustment data for adjustment of the focus displacement amount, a second adjustment data for adjustment of the exposure time and a third adjustment data for adjustment of the light emission amount; first adjustment means for adjusting the focus displacement amount by using the first adjustment data stored in said adjustment data memory; second adjustment means for adjusting the exposure time by using the second adjustment data stored in said adjustment data memory; and third adjustment means for adjusting the light emission amount by using the third adjustment data stored in said adjustment data memory.

Claim 17

A photographic camera system, comprising: a photographic lens; light measuring means for measuring brightness of an object to be photographed and then for generating light measurement data; focus detecting means for detecting a focus condition of said photographic lens and for calculating a focus displacement amount; film speed information input means for receiving film speed information; exposure time calculating means for calculating an exposure time based on the light measurement data of said light measuring means and on the film speed information from said film speed information input means; light emission control means for receiving light reflected from said object and for generating a signal for controlling a light emission amount of said electronic flash device; an adjustment data memory constituted by an EEPROM for storing a first adjustment data for adjustment of the focus displacement amount, a second adjustment data for adjustment of the exposure time and a third adjustment data for adjustment of the light emission amount; first adjustment means for adjusting the focus displacement amount by using the first adjustment data stored in said adjustment data memory; second adjustment means for adjusting the exposure time by using the second adjustment data stored in said adjustment data memory; and third adjustment means for adjusting the light emission amount by using the third adjustment data stored in said adjustment data memory.

Claim 18

A photographic camera comprising: light measuring means, including; light measuring circuit for generating analog information corresponding to brightness of an object to be photographed, and an A/D converter for converting the analog information into digital information; an EEPROM for storing digital data related to operational tolerances of said light measuring circuit for the adjustment of the output of said light measuring means; adjustment means for obtaining an adjusted object brightness value from the digital output of said A/D converter and from the adjustment data read from said EEPROM; wherein said adjustment means calculates the adjusted object brightness value BVo' from the following equation: BVo'=m·BVo+n in which, BVo denotes the digital information from said A/D converter of said light measuring circuit and m and n denote the digital adjustment data stored in said adjustment data memory; and exposure control means for controlling an exposure based on the adjusted object brightness value.

Claim 19

A photographic camera comprising: light measuring means, including; light measuring circuit for generating analog information corresponding to brightness of an object to be photographed, and an A/D converter for converting the analog information into digital information; an EEPROM for storing digital data related to operational tolerances of said light measuring circuit for the adjustment of the output of said light measuring means; adjustment means for obtaining an adjusted object brightness value from the digital output of said A/D converter and from the adjustment data read from said EEPROM; wherein said adjustment means calculates the adjusted object brightness value BVo' from the following equation: BVo'=m·BVo+n in which, BVo denotes the digital information from said A/D converter of said light measuring circuit and m and n denote the digital adjustment data stored in said adjustment data memory; and exposure control means for controlling an exposure based on the adjusted object brightness value.

Claim 20

A photographic camera, comprising: light measuring means, including; light measuring circuit for generating analog information corresponding to brightness of an object to be photographed, and an A/D converter for converting the analog information into digital information; an adjustment data memory for storing digital data related to operational tolerances of said light measuring circuit for the adjustment of the output of said light measuring means; adjustment means for obtaining an adjusted object brightness value from the digital output of said A/D converter and from the adjustment data read from said adjustment data memory; wherein said adjustment means calculates the adjusted object brightness value BVo' from the following equation: BVo'=m·BVo+n in which, a mark BVo denotes the object brightness value provided by said A/D converter of said light measuring means and marks `m` and `n` denote the adjustment data stored in said adjustment data memory; and exposure control means for controlling an exposure based on the adjusted object brightness value.

Claim 21

A photographic camera, comprising: light measuring means, including; light measuring circuit for generating analog information corresponding to brightness of an object to be photographed, and an A/D converter for converting the analog information into digital information; an adjustment data memory for storing digital data related to operational tolerances of said light measuring circuit for the adjustment of the output of said light measuring means; adjustment means for obtaining an adjusted object brightness value from the digital output of said A/D converter and from the adjustment data read from said adjustment data memory; wherein said adjustment means calculates the adjusted object brightness value BVo' from the following equation: BVo'=m·BVo+n in which, a mark BVo denotes the object brightness value provided by said A/D converter of said light measuring means and marks `m` and `n` denote the adjustment data stored in said adjustment data memory; and exposure control means for controlling an exposure based on the adjusted object brightness value.

Claim 22

A photographic camera, as defined in claim 13, wherein said A/D converter is constituted by a double integral type A/D converter circuit.

Claim 23

A photographic camera system comprising: light measuring means for measuring brightness of an object to be photographed and then for generating light measurement data; film speed information input means for receiving film speed information; exposure time calculating means for calculating an exposure time value as a logarithmically compressed value based on the light measurement data of said light measuring means and on the film speed information from said film speed information input means; an EEPROM for storing an adjustment data used for correcting the logarithmically compressed exposure time value; means for correcting the logarithmically compressed exposure time value by using the adjustment data stored in said EEPROM, and for obtaining an actual exposure time by logarithmically expanding the corrected exposure time value; and exposure control means for controlling an exposure based on the expanded exposure time.

Claim 24

A photographic camera system comprising: light measuring means for measuring brightness of an object to be photographed and then for generating light measurement data; film speed information input means for receiving film speed information; exposure time calculating means for calculating an exposure time value as a logarithmically compressed value based on the light measurement data of said light measuring means and on the film speed information from said film speed information input means; an EEPROM for storing an adjustment data used for correcting the logarithmically compressed exposure time value; means for correcting the logarithmically compressed exposure time value by using the adjustment data stored in said EEPROM, and for obtaining an actual exposure time by logarithmically expanding the corrected exposure time value; and exposure control means for controlling an exposure based on the expanded exposure time.

Claim 25

A photographic camera, as defined in claim 15, wherein said correcting means obtains the adjustment amount ΔTv used for correcting the logarithmically compressed exposure time value Tv from the following equation: ΔTv=log.sub.2 (1+Δts·2.sup.TV) in which Δts denotes the adjustment data read from said EEPROM.

Claim 26

A photographic camera system capable of controlling a flash light emission amount, comprising: an electronic flash device; light emission control means for generating a light emission stop signal and outputting the stop signal to said electronic flash device when an amount of light reflected by an object to be photographed has reached a predetermined value; an EEPROM for storing digital adjustment data for adjustment of the predetermined value; and adjustment means for adjusting the predetermined value based on the adjustment data stored in said EEPROM.

Claim 27

A photographic camera system capable of controlling a flash light emission amount, comprising: an electronic flash device; light emission control means for generating a light emission stop signal and outputting the stop signal to said electronic flash device when an amount of light reflected by an object to be photographed has reached a predetermined value; an EEPROM for storing digital adjustment data for adjustment of the predetermined value; and adjustment means for adjusting the predetermined value based on the adjustment data stored in said EEPROM.