Handheld image scanner with automatic movement control

Details Handheld image scanner with automatic movement control Handheld image scanner with automatic movement control

1991-11-06

1993-01-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

358473, H01J 314, H04H 1024

Patent

active

051824507

ABSTRACT:
A handheld image scanner is provided with a driving motor to permit manual or automatic transverse scanning movement. Stable and proper linear movement of the handheld image scanner is ensured when movement of the handheld image scanner is automatically controlled. The voltage supply to the driving motor can be adjusted so as to obtain the preferred scanning speed for a desired degree of resolution. The handheld image scanner is to be electrically connected to a computer which receives digital scan data from the image scanner. A transistor unit, which is connected in series to the driving motor, is controlled by the computer so as to interrupt current supply to the driving motor when the computer is not ready to receive additional scan data. Scanning is thus stopped and is resumed only when the computer is able to receive more scan data.

REFERENCES:
patent: 4438459 (1984-03-01), Levine
patent: 4574317 (1986-03-01), Scheible
patent: 4588282 (1986-05-01), Levine
patent: 4703186 (1987-10-01), Nakayama et al.
patent: 4797544 (1989-01-01), Montgomery et al.
patent: 4819083 (1989-04-01), Kawai et al.
patent: 4866535 (1989-09-01), Kubota et al.
patent: 4893189 (1990-01-01), Kubota et al.
patent: 5019918 (1991-05-01), Kubota et al.

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