Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1995-12-20
1997-08-12
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
360 7304, G11B 1508
Patent
active
056571780
ABSTRACT:
An improved tape position and reel rotation detection method for a VCR capable of detecting top and end positions of a tape, a supply reel rotation, and a take-up reel rotation by alternatively performing a tape position detection operation and a reel rotation detection operation, which includes the steps of: a first step which turns off tape position detection light emitting devices and first and second reel rotation detection light emitting devices for a first certain time at an initial stage of a reproducing or recording mode; a second step which turns on the first and second reel rotation detection light emitting devices for a second certain when the first certain time is lapsed, detects the rotation of a take-up reel for a certain time of the second certain time, and detection the rotation of a supply reel for a certain time; a third step which, after the second certain time is lapsed, turns off the first and second reel rotation detection light emitting devices, which are in a turned-on state, for a third certain time; a fourth step which, after the third certain time is lapsed, turns on the tape position light emitting device for a fourth certain time, detects a start position of the tape for a certain time of the fourth certain time, and a detects an end portion of the tape for a certain time; and a fifth step which executes the first through fourth steps after a fourth certain time is lapsed.
REFERENCES:
patent: 4996541 (1991-02-01), Mori et al.
English language abstract of JP 6012730, Jan. 21, 1994.
English language abstract of JP 6044639, Feb. 18, 1994.
English language abstract of JP 6036419, Feb. 10, 1994.
English language abstract of JP 3230347, Oct. 14, 1991.
Habermehl James L.
LG Electronics Inc.
Psitos Aristotelis M.
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