Abstract: To realize power saving of an LCD unit according to VESA standard with a low cost, a power saving circuit of the invention comprises screen control means (2, 3, 4) for turning off a back-light of the LCD (5) and stopping display data to be supplied to the LCD, when a vertical synchronous signal output by the LCD control circuit is suspended for a first fixed time; and power control means (6, 7) for stopping a power supply of the LCD, when a horizontal synchronous signal output by the LCD control circuit is suspended for a second fixed time.

Abstract: A feeding device which feeds paper sheets accommodated in a paper supply tray detachable from a body of an image forming apparatus. Paper sheets stacked in the paper supply tray is induced to make pressure contact with a feed roller in conjunction with attachment of the paper supply tray to the body of the apparatus, and release the pressure contact between paper sheets and the feed roller in conjunction with detachment of the paper supply tray from the body of the apparatus. The feed roller has on an exterior surface at least one portion having a friction coefficient lower than the rest portion of the exterior surface, and is stopped its rotation in a state that the lower friction coefficient portion contacts with an uppermost paper sheet when paper feeding is completed, so as to prevent paper jams caused by shifting or deformation of the uppermost paper sheet during attachment or detachment of the paper supply tray to the body of the apparatus.