Abstract: A heating device includes a heat generating element, a switching element, a capacitor, a connecting portion, and a controller. When the connecting means is changed in state from an on state to an off state, the controller causes the capacitor to discharge an electric charge of the capacitor by bringing the switching element into a conduction state for a predetermined time after the connecting means is changed in state to the off state.

Abstract: The image forming apparatus includes a fixing apparatus including a heater that includes at least two heat generation members, the fixing unit configured to fix an unfixed toner image formed on a sheet by an image forming unit, a heat generation member switching device configured to switch a power supply path so that electric power can be supplied to one of the heat generation members, a CPU configured to control switching the power supply path by the heat generation member switching device based on a number of shorter width sheets in a longitudinal direction continuously printed in a case where a plurality of mixed sheets including longer width sheets and the shorter width sheets.

Abstract: The image forming apparatus includes a fixing apparatus including a heater that includes at least two heat generation members, the fixing unit configured to fix an unfixed toner image formed on a sheet by an image forming unit, a heat generation member switching device configured to switch a power supply path so that electric power can be supplied to one of the heat generation members, a CPU configured to control switching the power supply path by the heat generation member switching device based on a number of shorter width sheets in a longitudinal direction continuously printed in a case where a plurality of mixed sheets including longer width sheets and the shorter width sheets.

Abstract: In a structure composed having a one-bit counter, a D-FF, a selector, and an AND gate, while the signal level of a thin-out signal is low, a read clock signal of a line memory is thinned out. Thus, video signals (a Y signal, a CR signal, and a CB signal) read from a line memory are horizontally magnified. At this point, both edges of a low portion of the input thin-out signal are synchronized with even number data of color difference signals (CR/CB) read from the line memory after a start signal that is a video signal read start signal is input.