Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1998-07-21
2000-10-17
Le, Que T.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25055936, 25055924, 358449, 358486, H01J 314
Patent
active
061335649
ABSTRACT:
A scanning area detection method applies to a shuttle scanner having a position sensor mounted with respect to a paper guide of the shuttle scanner, with the position sensor outputting an electrical signal indicative of the position of the paper guide. The method includes the steps of: adjusting the position of the paper guide according to the width of a document to be scanned; determining a width value of the document to be scanned according to the electrical signal output of the position sensor and storing the detected width value in a memory; and scanning a block by slices while incrementing a slice coefficient, at least until the slice coefficient of the last scanned slice of the block reaches the stored width value. The shuttle scanner processes block slices corresponding to a physical scanning limit of the shuttle scanner minus the determined width value, as extra-document data. If it is determined that the mode of operation of the shuttle scanner is a facsimile mode, the extra-document data is processed as white data. Otherwise, the extra-document data is processed as a null value.
REFERENCES:
patent: 5805308 (1998-09-01), Tanaka et al.
patent: 5895928 (1999-03-01), Kerschner
Bushnell Esq. Robert E.
Le Que T.
Luu Thanh X.
Samsung Electronics Co,. Ltd.
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