EP0095771A2
Expired / Lapsed
EP
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Scanning control apparatus
Assignee: Toshiba Corp
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Filing: 1983-05-30
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Granted: —
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Expires: 2003-05-30
Abstract
Abstract A scanning control apparatus includes motor driving circuits (7, 8) and a control circuit (6). The motor driving circuit (8) drives a motor (9) in a backward direction for a predetermined time counted by a counter (21). Then, the motor driving circuit (7) drives the motor (9) in a forward direction until the forward velocity of the motor (9) becomes constant before enabling the output from a line scanner (3).
Inventors
- 👤 Akio Sangu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 02:47
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/047; H04N1/0473; H04N1/12; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H04N2201/00; H04N2201/04; H04N2201/047; H04N2201/04701; H04N2201/0471; H04N2201/04715; H04N2201/04724; H04N2201/04725; H04N2201/04734; H04N2201/04753; H04N2201/04756; H04N2201/04758; H04N2201/04767; H04N2201/04781; H04N2201/04786
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A scanning control means having scanning means (2, 3) for line-scanning an object, feeding means (9, 10, lla, llb, llc, lld) for feeding the object in a direction perpendicular to a direction of the line-scanning, and driving means (7, 8) for selectively driving said feeding means in a forward direction or a backward direction characterized in that there is further provided control means (6) for controlling said driving means and said scanning means such that said driving means drives said feeding means in a backward direction for a predetermined time after the apparatus is started, and then drives said feeding means in a forward direction until the forward velocity becomes constant before said scanning means produces scanned data.
Claim 2
Dependent Claim
118 words
A scanning control means having scanning means (2, 3) for line-scanning an object, feeding means (9, 10, lla, llb, llc, lld) for feeding the object in a direction perpendicular to a direction of the line-scanning, and driving means (7, 8) for selectively driving said feeding means in a forward direction or a backward direction characterized in that there is further provided control means (6) for controlling said driving means and said scanning means such that said driving means drives said feeding means in a backward direction for a predetermined time after the apparatus is started, and then drives said feeding means in a forward direction until the forward velocity becomes constant before said scanning means produces scanned data.
Claim 3
Dependent Claim
18 words
A scanning control means according to claim 1, characterized in that said control means (6) comprises a microcomputer.
Claim 4
Dependent Claim
57 words
A scanning control means according to claim 1, characterized in that said control means includes: a first time-counting means (21) for counting the predetermined time of the feeding means being fed in the backward direction; and a second time-counting means (22) for counting a time necessary for the forward velocity of said feeding means to become constant.
Claim 5
Dependent Claim
19 words
A scanning control means according to claim 1, characterized in that said feeding means includes a reversible motor (9).
Claim 6
Dependent Claim
80 words
A scanning control means according to claim 4, characterized in that said control means includes: a shaft encoder (23) for measuring the rotation of said motor; a phase discriminator (24) for discriminating the phase of the signal from said shaft encoder; first counter (25) for counting the output from said phase discriminator when said motor rotates in a forward direction; and second counter (26) for counting the output from said phase discriminator when said motor rotates in a backward direction.
Claim 7
Dependent Claim
24 words
A scanning control means according to claim 1, characterized in that said feeding means (9, 10, lla, llb, llc, lld) includes a pulse motor.
Claim 8
Dependent Claim
42 words
A scanning control means according to claim 6, characterized by further comprising: a first counter (21) for counting forward-rotation pulses to be fed to said motor; and a second counter (22) for counting backward- rotation pulses to be fed to said motor.
Claim 9
Dependent Claim
91 words
A scanning control method characterized in that a main scanning of an object is performed by a line scanner (3) and a sub-scanning is performed by feeding the object in a direction perpendicular to a direction of the main scanning to obtain picture signals from the line scanner, comprising the steps of: a. feeding the object in a backward direction for a predetermined time after power is ON; b. feeding the object in a forward direction until the forward velocity becomes constant; and c. enabling the output from the line scanner.
Claim 10
Dependent Claim
91 words
A scanning control method characterized in that a main scanning of an object is performed by a line scanner (3) and a sub-scanning is performed by feeding the object in a direction perpendicular to a direction of the main scanning to obtain picture signals from the line scanner, comprising the steps of: a. feeding the object in a backward direction for a predetermined time after power is ON; b. feeding the object in a forward direction until the forward velocity becomes constant; and c. enabling the output from the line scanner.
References Cited (Backward Citations)
No citation records indexed.
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