Printing apparatus and printing method
AssigneeCanon Kabushiki Kaisha
InventorsShimpei Fujisaki, Yasuhiro Ota, Koya Iwakura
Life of this patent
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Abstract
Provided is a technique that makes it possible to obtain the center of an optical disk with high accuracy. A detecting unit is made to pass over the hole formed at the center of an optical disk and to detect the position of the center of the hole, and an obtaining unit obtains the detected position of the center of the hole as the center of the optical disk. Then, a setting unit sets a print position for the optical disk based on the position of the center of the optical disk obtained by the obtaining unit.
Claims11
A printing apparatus comprising:
- a conveying unit configured to convey an optical disk held by a holding unit in a conveyance direction;
- a print unit configured to perform printing on a print surface of the optical disk;
- a detecting unit configured to emit light to the holding unit and the optical disk, receive reflected light, and detect change in the amount of the received light;
- a movement unit configured to move the detecting unit in a scanning direction intersecting the conveyance direction;
- an obtaining unit configured to control the movement unit and the conveying unit to make the detecting unit pass over a hole formed at the center of the optical disk and make the detecting unit detect the position of the center of the hole, and configured to obtain the detected position of the center of the hole as the position of the center of the optical disk;
- and
- a setting unit configured to set a print position for the print surface of the optical disk based on the position of the center of the optical disk obtained by the obtaining unit.
A printing method of performing printing on an optical disk using a printing apparatus including
- a conveying unit configured to convey an optical disk held by a holding unit in a conveyance direction,
- a print unit configured to perform printing on the optical disk,
- a detecting unit configured to emit light to the holding unit and the optical disk, receive reflected light, and detect change in the amount of the received light, and
- a movement unit configured to move the detecting unit in a scanning direction intersecting the conveyance direction, the printing method comprising:
- a first step of moving the detecting unit relative to the optical disk in the conveyance direction such that the detecting unit passes over a hole formed at the center of the optical disk, and obtaining the position of the center in the conveyance direction of the hole based on edges on both sides of the hole detected by the detecting unit during the movement of the detecting unit;
- a second step of moving the detecting unit relative to the optical disk in the scanning direction such that the detecting unit passes over the hole, and obtaining the position of the center in the scanning direction of the hole based on edges on both sides of the hole detected by the detecting unit during the movement of the detecting unit;
- a third step of determining that the position of the center of the optical disk is the position of the center in the conveyance direction and the scanning direction of the hole obtained at the first step and the second step, and setting a print position for the optical disk based on the position of the center of the optical disk;
- and
- a fourth step of printing based on the print position obtained at the third step.
Dependencies are inferred from the claim text.