A 2D3D image switching display device includes an image display unit and an image switching unit coupled to the image display unit. More particularly, at least one embodiment of the invention pertains to a technique to place at least one processing core in a power state without coordinating with the power state of one or more other processing cores. The assembly further includes an upper support arm cantilevered and secured to the first support arm. Where the grooving part protrudes from the facing part, the corners at which the facing surface joins the side surfaces of the grooving part are formed such that each corner has a beveled surface portion.