Exposure control circuit for a camera having a load circuit

Claim 2

A camera system having an electric motor for driving a load member, comprising: (a) a light metering circuit; (b) an exposure control circuit for controlling exposure in accordance with the output of said light metering circuit; (c) an electrical power supply circuit for supplying electrical power to said light metering circuit and said motor from a common battery; and (d) prohibiting means for stopping the transfer of the output of said light metering circuit to said exposure control circuit for a prescribed time when current is supplied to said motor.

Claim 3

A camera system having an electric motor for driving a load member, comprising: (a) a light metering circuit for producing an output proportional to the brightness level of an object to be photographed; (b) a hold circuit having an input connected to the output of said light metering circuit and responsive to prohibition of the transfer of the output of said light metering circuit thereto for holding that output of said light metering circuit which has been transferred thereto before that prohibition until the output of said light metering circuit is allowed again to transfer; (c) an exposure control circuit for controlling an exposure in accordance with the output of said hold circuit; (d) an electrical power supply circuit for supplying electrical power to said light metering circuit and said motor from a common battery; and (e) prohibiting means for stopping the transfer of the output of said light meeting circuit to said hold circuit for a prescribed time when said motor is supplied with electrical power.

Claim 4

A camera system having an electric motor for driving a load member, comprising: (a) a light metering circuit for producing an output proportional to the brightness level of an object to be photographed; (b) a hold circuit having an input connected to the output of said light metering circuit and responsive to prohibition of the transfer of the output of said light metering circuit thereto for holding that output of said light metering circuit which has been transferred thereto before that prohibition until the output of said light metering circuit is allowed again to transfer; (c) an exposure control circuit for controlling an exposure in accordance with the output of said hold circuit; (d) an electrical power supply circuit for supplying electrical power to said light metering circuit and said motor from a common battery; and (e) prohibiting means for stopping the transfer of the output of said light meeting circuit to said hold circuit for a prescribed time when said motor is supplied with electrical power.

Claim 5

A camera system having an electric motor for driving a photographic lens, comprising: (a) a light metering circuit for producing a output proportional to the brightness level of an object to be photographed; (b) a hold circuit having an input connected to the output of said light metering circuit and responsive to prohibition of the transfer of the output of said light metering circuit thereto for holding that output of said light metering circuit which has been transferred thereto before that prohibition until the output of said light metering circuit is allowed again to transfer; (c) an exposure control circuit for controlling an exposure in accordance with the output of said hold circuit, said circuit being responsive to actuation of a camera release for initiating an exposure operation; (d) an electrical power supply circuit for supplying electrical power to said light metering circuit and said motor from a common battery; and (e) prohibiting means for stopping the transfer of the output of said light metering circuit to said hold circuit for a prescribed time when said motor is supplied with electrical power.

Claim 6

A camera system having an electric motor for driving a photographic lens, comprising: (a) a light metering circuit for producing a output proportional to the brightness level of an object to be photographed; (b) a hold circuit having an input connected to the output of said light metering circuit and responsive to prohibition of the transfer of the output of said light metering circuit thereto for holding that output of said light metering circuit which has been transferred thereto before that prohibition until the output of said light metering circuit is allowed again to transfer; (c) an exposure control circuit for controlling an exposure in accordance with the output of said hold circuit, said circuit being responsive to actuation of a camera release for initiating an exposure operation; (d) an electrical power supply circuit for supplying electrical power to said light metering circuit and said motor from a common battery; and (e) prohibiting means for stopping the transfer of the output of said light metering circuit to said hold circuit for a prescribed time when said motor is supplied with electrical power.

Claim 7

A camera system having a light metering circuit and a load circuit, comprising: (a) a light metering circuit; (b) an exposure control circuit for controlling exposure in accordance with the output of said light metering circuit; (c) a power supply circuit for supplying electrical power to said light metering circuit and said load circuit from a common battery; and (d) prohibiting means for stopping the transfer of the output of said light metering circuit to said exposure control circuit for a prescribed time when said load circuit is supplied with electrical power.

Claim 8

A camera system having a light metering circuit and a load circuit, comprising: (a) a light metering circuit; (b) an exposure control circuit for controlling exposure in accordance with the output of said light metering circuit; (c) a power supply circuit for supplying electrical power to said light metering circuit and said load circuit from a common battery; and (d) prohibiting means for stopping the transfer of the output of said light metering circuit to said exposure control circuit for a prescribed time when said load circuit is supplied with electrical power.

Claim 9

A camera system having a light metering circuit and a load circuit, comprising: (a) a light metering circuit for producing an output proportional to the brightness level of an object to be photographed; (b) a hold circuit having an input connected to the output of said light metering circuit and responsive to prohibition of the transfer of the output of said light metering circuit thereto for holding that output of said light metering circuit which has been transferred thereto before that prohibition until the output of said light metering circuit is allowed again to transfer; (c) an exposure control circuit for controlling an exposure in accordance with the output of said hold circuit; (d) a power supply circuit for supplying electrical power to said light metering circuit and said load circuit from a common battery; and (e) prohibiting means for stopping the transfer of the output of said light metering circuit to said hold circuit for a prescribed time when said load circuit is supplied with electrical power.

Claim 10

A camera system having a light metering circuit and a load circuit, comprising: (a) a light metering circuit for producing an output proportional to the brightness level of an object to be photographed; (b) a hold circuit having an input connected to the output of said light metering circuit and responsive to prohibition of the transfer of the output of said light metering circuit thereto for holding that output of said light metering circuit which has been transferred thereto before that prohibition until the output of said light metering circuit is allowed again to transfer; (c) an exposure control circuit for controlling an exposure in accordance with the output of said hold circuit; (d) a power supply circuit for supplying electrical power to said light metering circuit and said load circuit from a common battery; and (e) prohibiting means for stopping the transfer of the output of said light metering circuit to said hold circuit for a prescribed time when said load circuit is supplied with electrical power.

Claim 11

A camera system having a light metering circuit and a load circuit, comprising: (a) a light metering circuit for producing an output proportional to the brightness level of an object to be photographed; (b) a hold circuit having an input connected to the output of said light metering circuit and responsive to prohibition of the transfer of the output of said light metering circuit thereto for holding that output of said light metering circuit which has been transferred thereto before that prohibition until the output of said light metering circuit is allowed again to transfer; (c) an exposure control circuit for controlling an exposure in accordance with the output of said hold circuit, said circuit being responsive to actuation of a camera release for initiating an exposure operation; (d) a power supply circuit for supplying electrical power to said light metering circuit and said load circuit from a common battery; and (e) prohibiting means for stopping the transfer of the output of said light metering circuit to said hold circuit for a prescribed time when said load circuit is supplied with electrical power.

Claim 12

A camera system having a light metering circuit and a load circuit, comprising: (a) a light metering circuit for producing an output proportional to the brightness level of an object to be photographed; (b) a hold circuit having an input connected to the output of said light metering circuit and responsive to prohibition of the transfer of the output of said light metering circuit thereto for holding that output of said light metering circuit which has been transferred thereto before that prohibition until the output of said light metering circuit is allowed again to transfer; (c) an exposure control circuit for controlling an exposure in accordance with the output of said hold circuit, said circuit being responsive to actuation of a camera release for initiating an exposure operation; (d) a power supply circuit for supplying electrical power to said light metering circuit and said load circuit from a common battery; and (e) prohibiting means for stopping the transfer of the output of said light metering circuit to said hold circuit for a prescribed time when said load circuit is supplied with electrical power.

Claim 13

A camera system as in claim 4, 5 or 6 wherein said load circuit is a focus detecting circuit for detecting focus.

Claim 14

A camera system having a light metering circuit and a load circuit, comprising: (a) a light metering circuit for producing an output proportional to the brightness level of an object to be photographed; (b) an A/D converting circuit for converting the output of said light metering circuit by a prescribed period to renew the A/D converted value; (c) an exposure control circuit for controlling an exposure in accordance with the output of said A/D converting circuit; (d) a power supply circuit for supplying electrical power to said light metering circuit and said load circuit from a common battery; and (e) a prohibiting circuit for prohibiting the renewing of the A/D converted value to be applied to said exposure control circuit for a prescribed time when said load is supplied with electrical power.

Claim 15

A camera system having a light metering circuit and a load circuit, comprising: (a) a light metering circuit for producing an output proportional to the brightness level of an object to be photographed; (b) an A/D converting circuit for converting the output of said light metering circuit by a prescribed period to renew the A/D converted value; (c) an exposure control circuit for controlling an exposure in accordance with the output of said A/D converting circuit; (d) a power supply circuit for supplying electrical power to said light metering circuit and said load circuit from a common battery; and (e) a prohibiting circuit for prohibiting the renewing of the A/D converted value to be applied to said exposure control circuit for a prescribed time when said load is supplied with electrical power.

Claim 16

A camera system having a light metering circuit and a load circuit, comprising: (a) a light metering circuit for producing an output proportional to the brightness level of an object to be photographed; (b) an A/D converting circuit for converting the output of said light metering circuit by a prescribed period to renew the A/D converted value; (c) a hold circuit receptive of a signal representing an A/D converted value by said A/D converting circuit for holding said received A/D converted value until another signal representing the next A/D converted value is applied thereto; (d) an exposure control circuit for controlling an exposure in accordance with the A/D converted value held in said hold circuit, said circuit being responsive to actuation of a camera release for initiating an exposure operation; (e) a power supply circuit for supplying electrical power to said light metering circuit and said load circuit from a common battery; and (f) prohibiting means for stopping the transfer of the A/D converted value to said hold circuit for a prescribed time when said load circuit is supplied with electrical power.

Claim 17

A camera system having a light metering circuit and a load circuit, comprising: (a) a light metering circuit for producing an output proportional to the brightness level of an object to be photographed; (b) an A/D converting circuit for converting the output of said light metering circuit by a prescribed period to renew the A/D converted value; (c) a hold circuit receptive of a signal representing an A/D converted value by said A/D converting circuit for holding said received A/D converted value until another signal representing the next A/D converted value is applied thereto; (d) an exposure control circuit for controlling an exposure in accordance with the A/D converted value held in said hold circuit, said circuit being responsive to actuation of a camera release for initiating an exposure operation; (e) a power supply circuit for supplying electrical power to said light metering circuit and said load circuit from a common battery; and (f) prohibiting means for stopping the transfer of the A/D converted value to said hold circuit for a prescribed time when said load circuit is supplied with electrical power.

Claim 18

A camera system as in claim 8 or 9 wherein said load circuit is an electric motor for driving a photographic lens.

Claim 19

A camera system as in claim 8 or 9 wherein said load circuit is a focus detecting circuit for performing focus detection.