Camera having a charging operation which is inhibited during an operation of the camera function section and a battery check function which is inhibited during the charging function

• US 5,210,568 A
• Filed: 07/20/1992
• Issued: 05/11/1993
• Est. Priority Date: 11/13/1989
• Status: Expired due to Term

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Yamamoto, Masanaga, Miyake, Izumi, Yoshida, Masanori, Kaneko, Kiyotaka, Shimaya, Hiroshi
• Primary Examiner(s): PERKEY, WILLIAM B
• Application Number:
  US07/915,876
• Time in Patent Office: 295 Days
• Field of Search: 354/127.1, 354/127.11, 354/127.12, 354/145.1, 354/268, 354/418, 354/468, 354/484
• US Class Current: 396/303
• CPC Class Codes: G03B 2217/007 Details of energy supply or management
• CPC Class Codes: G03B 7/26 Power supplies; Circuitry or arrangement to switch on the power source; Circuitry to check the power source voltage

Abstract

In a camera having a power source shared between a charging circuit for a strobe emission and a camera function section other than the charging circuit, the charging operation is inhibited during an operation of the camera function section and a battery check is inhibited during the charging operation. As a result, a runaway of a CPU of the camera due to the voltage reduction of the power source in the charging operation is avoided; moreover, inhibition of a shooting operation due to the battery check is prevented, thereby efficiently utilizing the battery capacity.

Claims

1. A camera having a battery check function comprising:

a power source commonly used for a charging circuit associated with a strobe emission and a camera function section other than the charging circuit;

battery check means for achieving a battery check on said power source;

shooting operation inhibiting means for inhibiting a shooting operation when said battery check means detects that a volatage outputted from said power source is equal to or less than a predetermined value;

processing detect means for detecting an initiation and a termination of an operation of said camera function section;

power source inhibiting means for inhibiting said power source from charging said charging circuit during a period of time from when said processing detect means detects the initiation of said camera function section to when said processing detect means detects the termination thereof;

charging detect means for detecting a state in which the charging is being conducted onto said charging circuit;

battery check inhibiting means for inhibiting said battery check means from accomplishing the battery check while a charging operation onto said charging circuit is being detected by said charging detect means; and

control means for causing said power source inhibiting means to inhibit said power source from charging said charging circuit until a camera function processing is completed and for causing said camera function section to execute a requested camera function processing when a camera function is requested while said charging detect means is detecting the state in which the charging is being conducted onto said charging circuit.

2. A camera in accordance with claim 1, wherein said charging circuit is only charged during a standby mode and said power source is used for said camera function section in an operating state.

3. A camera in accordance with claim 1, wherein said shooting operation is inhibited when said voltage outputted from said power source is equal to or less than said predetermined value of 5.6 V.

4. A method of operating a camera having a power source commonly used for a charging circuit associated with a strobe emission and a camera function section other than the charging circuit, battery check means for achieving a battery check on said power source, shooting operation inhibiting means for inhibiting a shooting operation when said battery check means detects that a voltage outputted from said power source is equal to or less than a predetermined value, and a control unit for conducting a control operation to achieve various functions of the camera, comprising the steps of:

setting the control unit in a standby state in which an interruption signal can be accepted;

changing a state of the control unit responsive to the interruption signal denoting a processing start of said function of the camera from the standby state to an operating state;

allowing, by means of the control unit, the charging operation to be achieved onto the charging circuit;

initiating, by means of the control unit in response to a reception of the interruption signal designating a charging instruction, the charging operation onto the charging circuit and inhibiting the battery check means from accomplishing the battery check;

stopping, by means of the control unit in response to a reception of the interruption signal designating an instruction other than the charging instruction, the charging operation being achieved onto the charging circuit, if the charging operation is being executed; and

inhibiting, by means of the control unit in response to a reception of the interruption signal designating an instruction other than the charging instructions, the charging operation from being achieved onto the charging circuit and executing processing based on the received interruption signal.

5. A method in accordance with claim 4 wherein the control operation is returned to the standby mode when the interruption signal indicating a completion of the charging operation is received.

6. A method in accordance with claim 4, wherein said charging circuit is only charged during said standby state and said power source is used for said camera function section in said operating state.

7. A method in accordance with claim 4, wherein said shooting operation is inhibited when said voltage outputted from said power source is equal to or less than said predetermined value of 5.6 V.