Image pickup apparatus including interruption means for causing recordation of an electrical image signal in response to operation of a second trigger before completion of a predetermined step by a first trigger

• US 5,872,433 A
• Filed: 09/12/1995
• Issued: 02/16/1999
• Est. Priority Date: 05/21/1986
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Sakai, Shinji
• Primary Examiner(s): Sircus, Brian
• Application Number:
  US08/526,986
• Time in Patent Office: 1,253 Days
• Field of Search: 318/139, 318/105-110, 396/49, 396/301, 396/302, 396/303, 307/18-26, 307/29, 307/38, 307/39, 307/41, 307/64-66, 307/85, 307/86
• US Class Current: 318/139
• CPC Class Codes: F02B 2075/025 two
• CPC Class Codes: H02J 1/10 Parallel operation of dc sources
• CPC Class Codes: H02J 7/34 Parallel operation in networks using both storage and other dc sources, e.g. providing buffering H02J7/14 takes precedence
• CPC Class Codes: H04N 1/00885 Power supply means, e.g. arrangements for the control of power supply to the apparatus or components thereof
• CPC Class Codes: H04N 1/00904 Arrangements for supplying power to different circuits or for supplying power at different levels H04N1/00896 takes precedence
• CPC Class Codes: H04N 1/2104 for one or a few pictures
• CPC Class Codes: H04N 1/2116 Picture signal recording combined with imagewise recording, e.g. photographic recording photographic cameras G03B19/00
• CPC Class Codes: H04N 1/2158 using a detachable storage unit
• CPC Class Codes: H04N 2101/00 Still video cameras
• CPC Class Codes: H04N 2201/0084 Digital still camera

Abstract

A recording or reproducing apparatus has a motor for use in relative displacement of a recording medium and a head at high speed and a booster circuit for supplying power to the internal circuit. The apparatus also includes control means which control actuation of the booster circuit after the motor is supplied with a relatively large current, if a first power supply capable of discharging a relatively large current is used. The control means causes a relatively small current to be supplied to the motor after the booster circuit is actuated if a second power supply capable of discharging only a relatively small current is used.

Claims

1. A recording/reproducing apparatus comprising:

a motor driving relative displacement at high speed of at least one of a recording medium and a head;

a first power supply capable of discharging a first current;

a second power supply capable of discharging a second current less than the first current;

internal circuitry including image pickup elements;

a booster circuit supplying power to the internal circuitry; and

control means actuating said booster circuit after said motor is supplied with the first current from said first power supply and controlling said second power supply to supply the second current to said motor after said booster circuit is actuated.

2. A recording/reproducing apparatus according to claim 1, wherein said first power supply includes a battery.

3. A recording/reproducing apparatus according to claim 1, wherein said first power supply includes an AC/DC converter.

4. A motor control apparatus capable of selectively using a first power supply which can discharge a first electric current and a second power supply which can discharge a second electric current, said apparatus comprising:

a motor;

a booster circuit for driving internal circuitry other than said motor; and

control means for controlling said motor so that said booster circuit is actuated after the first electric current is supplied to said motor by the first power supply, and the second electric current is supplied by the second power supply to said motor after said booster circuit is actuated.

5. An apparatus according to claim 4, further comprising a recording/reproducing device which records and reproduces a signal.

6. An apparatus according to claim 5, wherein said motor is used to result in relative movement of a head and a recording medium.