US 9,811,770 B2
Image forming apparatus for improving power saving effect, and control method thereof
Kensuke Kawajiri, Saitama (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on May 25, 2016, as Appl. No. 15/163,772.
Claims priority of application No. 2015-109652 (JP), filed on May 29, 2015.
Prior Publication US 2016/0350636 A1, Dec. 1, 2016
Int. Cl. G06K 15/00 (2006.01)
CPC G06K 15/4055 (2013.01) 15 Claims
OG exemplary drawing
 
1. An image forming apparatus having a first power state and a second power state in which less power is used than in the first power state, and having a plurality of functions that periodically communicate with an external apparatus, the image forming apparatus comprising:
a communication interface configured to perform communications with the external apparatus; and
processing circuitry configured to:
calculate a remaining time before the image forming apparatus next communicates with the external apparatus, for each of the plurality of functions that periodically communicate with the external apparatus via the communication interface;
set, in a timer, the shortest one from among the plurality of calculated remaining times; and
cause a power state of the image forming apparatus to transit from the second power state to the first power state according to the remaining time set in the timer.