US Patent 10509480 Rotary operation device

A rotary operation device includes a rotary operation part on which a rotation operation is performed, a rotation detector configured to detect an amount of rotation of the rotary operation part, a display part integrally formed with the rotary operation part and configured to display an image while rotating with the rotary operation part, and a controller configured to control the display part such that the image is displayed moved in a direction opposite to a rotation direction of the rotary operation part based on the detected amount of rotation so as to look still to an operator.