| US 7,538,918 B2 | ||
| Toner image forming apparatus including gradation control | ||
| Makoto Oki, Moriya (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Feb. 18, 2005, as Appl. No. 11/60,440. | ||
| Claims priority of application No. 2004-047064 (JP), filed on Feb. 23, 2004. | ||
| Prior Publication US 2005/0185203 A1, Aug. 25, 2005 | ||
| Int. Cl. G03F 3/08 (2006.01); H04N 1/60 (2006.01); H04N 1/405 (2006.01); G06K 15/00 (2006.01); G03G 15/00 (2006.01); G03G 15/01 (2006.01) | ||
| U.S. Cl. 358—521 [358/1.9; 358/3.06; 358/3.1; 399/38; 399/39; 399/40; 399/41; 399/49; 399/72; 399/81; 399/82; 399/85; 399/87] | 7 Claims |
| 1. An image forming apparatus comprising:
a toner image forming device configured to form a toner image on a recording material;
a detector configured to detect density of the toner image formed by said toner image forming device;
a gradation control executing device configured to execute a gradation control in which an image forming condition is corrected
by detecting density of a predetermined gradation pattern, formed by said toner image forming device, by said detector;
an operating panel configured to permit designation by an operator of one of a plurality of modes including an image quality
priority mode, in which a first toner image is formed under the image forming condition corrected by the gradation control
after a main power switch is turned on, and a speed priority mode, in which the first toner image is formed under a predetermined
image forming condition without executing the gradation control after the main power switch is turned on; and
a controller configured to control said toner image forming device based on the designated mode.
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