A display case includes a housing partially surrounding a display space, a door pivotably coupled to the housing and cooperating with the housing to further enclose the display space, and a hinge assembly for pivotably coupling the door to the housing. When the monochrome mode printing is performed in the condition in which the color copy-forgery-inhibited pattern is set, and if the copy-forgery-inhibited pattern color is output with its color unchanged, the color is not converted into 100% black. Each female attachment portion has a receptacle portion and a base portion. The optically sensitive material has an electron lifetime that is greater than the electron transit time from the first contact to the second contact when the bias is applied between the first contact and the second contact. The unit differentiates the vehicle body side slip angle signal to generate a vehicle body side slip rate signal.