Patent ID: 9467586
Filing Date: 2016-10-11
CPC Classification: G03G,G06K,H04N

Claim Text:
1. An image forming apparatus which is switchable between a first mode and a second mode, in the first mode, power is supplied for performing image formation, and in the second mode, less power is consumed as compared to the power consumed in the first mode, comprising: a manual feed tray on which a sheet is placed; a first detection unit configured to detect presence/absence of any sheet on the manual feed tray; a second detection unit, including light emitting element and light receiving element, configured to detect reflected light which is irradiated from the light emitting element by the light receiving element and to detect an approximate sheet length of sheet placed on the manual feed tray in a conveying direction; and a control unit configured to control not to turn on the light emitting element when the image forming apparatus is switched to the first mode in a case where a factor to switch the mode to the first mode is a factor other than detection of a newly placed sheet on the manual feed tray by the first detection unit.