Abstract: A storage-retrieval management device includes: an image capturer that captures, from above a refrigerator that includes a main body and a door attached to the main body, images of the refrigerator with the door in an open state; a setter that sets a boundary along contours of the main body and the door in the images; and a determiner that determines whether an object is stored into the refrigerator or whether the object is retrieved from the refrigerator, based on whether the object is moved beyond the boundary that is set, the object being captured in one or more of the images.

Abstract: An optical display cell comprising a pair of substrates at least one of which is transparent, a sealing element for sealing the pair of substrates at their peripheral portions, and an adhesive for bonding portions of the pair of substrates inboard of the sealing element. By the adhesive, the distance between the pair of substrates is maintained approximately constant. Preferably, the adhesive is composed of Nylon or the like. In addition, a spacer member can be provided for maintaining the distance between the pair of substrates approximately uniform. Preferably, the spacer member is made of glass fiber. More preferably, the adhesive is attached to one of the substrates so as to indicate a specific type of symbol such as a line, a unit, or the like.