Backup device in case of power failure in image recording apparatus

• US 7,092,613 B1
• Filed: 03/30/2000
• Issued: 08/15/2006
• Est. Priority Date: 03/31/1999
• Status: Expired due to Fees

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Ide, Kouki, Maida, Yoshiaki
• Primary Examiner(s): TRAN, THAI Q
• Application Number:
  US09/539,521
• Time in Patent Office: 2,329 Days
• Field of Search: 386/46, 386/1, 386/33, 386/27, 386/40, 386/36, 386/109, 386/111, 386/112, 386/117, 386/122, 386/123, 386/124, 386/125, 386/126, 348/333.13, 348/372, 358/906, 358/909.1
• US Class Current: 386/277
• CPC Class Codes: G11B 19/04 Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
• CPC Class Codes: G11B 31/00 Arrangements for the associated working of recording or reproducing apparatus with related apparatus with cameras or projectors G03B31/00 ; recording/reproducing of music for electrophonic musical instruments G10H1/0033; automatic arrangements for answering calls or for recording messages for absent subscribers H04M1/64; telephonic communication systems adapted for combination with dictation recording and playback systems H04M11/10; connection of TV recorder with other related apparatus, e.g. TV camera or receiver, in which the TV signal is significantly involved H04N, e.g. H04N23/00, H04N5/765; combination of radio or TV with other apparatus, e.g. with vehicles H05K11/00
• CPC Class Codes: H04N 5/76 Television signal recording
• CPC Class Codes: H04N 5/78263 for recording on tracks inclined relative to the direction of movement of the tape
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/8063 using time division multiplex of the PCM audio and PCM video signals

Abstract

A backup device in case of power failure comprises a device for continuing, when power failure is detected by a power failure detecting circuit during a recording operation, the recording operation by turning a switch on, and a device for turning the switch off when data which have been stored in both memories immediately before power fails and all data composing two blocks to which the data belong have been recorded on a recording medium, to stop the recording operation.

Claims

1. A backup device in case of power failure in an image recording apparatus for alternately writing input image data or its compressed data in two memories for each block including data corresponding to a plurality of fields, reading out, every time data corresponding to one block are written into the memory, the data from the memory into which the data corresponding to one block have been written, and recording the data read out on a recording medium, comprising:

a backup power supply in case of power failure;

a power failure detecting circuit for detecting that power fails;

a power supply circuit connected to the backup power supply through switching means and supplying power to a portion required to continue at least a recording operation on the basis of the backup power supply;

means for continuing, when the power failure is detected by the power failure detecting circuit during the recording operation, the recording operation by turning the switching means on; and

means for turning the switching means off when the data which have been stored in both the memories immediately before power fails and all the data composing the two blocks to which the data belong have been recorded on the recording medium, to stop the recording operation.

2. The backup device in case of power failure according to claim 1, wherein the backup power supply in a battery, further comprising

a charging circuit for charging the battery on the basis of a commercial power supply when the power to the image recording apparatus is turned on.