| US 7,551,330 B2 | ||
| Image reading device, method of controlling the same, control program, storage medium and image forming apparatus provided with the image reading device | ||
| Masakatsu Yamada, Ibaraki (Japan); Toshiyuki Takano, Ibaraki (Japan); Yasushi Ishida, Ibaraki (Japan); Toshiaki Saito, Ibaraki (Japan); Takashi Imai, Chiba (Japan); Shigeyuki Sugiyama, Kanagawa (Japan); Makoto Satake, Chiba (Japan); Daigo Nakagawa, Ibaraki (Japan); Naomi Nakamura, Chiba (Japan); Nobuyuki Bannai, Chiba (Japan); Takuma Suzuki, Tokyo (Japan); and Seiya Fujinaga, Ibaraki (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Aug. 31, 2006, as Appl. No. 11/513,063. | ||
| Application 11/513063 is a division of application No. 10/200138, filed on Jul. 23, 2002, granted, now 7,133,165. | ||
| Claims priority of application No. 2001-238500 (JP), filed on Aug. 06, 2001; and application No. 2001-278601 (JP), filed on Sep. 13, 2001. | ||
| Prior Publication US 2006/0285179 A1, Dec. 21, 2006 | ||
| Int. Cl. H04N 1/04 (2006.01) | ||
| U.S. Cl. 358—474 [358/486; 358/497; 358/1.2; 358/1.12; 382/274; 382/275; 250/208.1] | 14 Claims |
| 13. A control method of an image reading apparatus, wherein said image reading apparatus includes an image reading unit adapted
to read a document; a driving unit adapted to move said image reading unit; a position detecting unit adapted to detect a
position of said image reading unit to move said image reading unit by said driving unit; a storing unit adapted to store
position information in a case that said position detecting unit detects that said image reading unit is placed at a reference
position; an updating unit adapted to update the position information stored in said storing unit; and a judging unit adapted
to judge whether said position detecting unit is normal or abnormal, wherein said updating unit updates the reference position
in a case that said judging unit judges that said position detecting unit is abnormal, comprising:
a step of detecting a position of said image reading unit to move said image reading unit by said driving unit; and
a step of storing position information in a case that said image reading unit is placed at a reference position in said step
of detecting a position of said image reading; and
a step of updating the position information stored in said step of storing position information.
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