Digital data encoding and decoding method and system is provided. Each of a plurality of slits included in the at least one rotating grating is formed along a curved line obtained by making each of a plurality of radial lines using the rotation axis as a center curved in the circumferential direction at a predetermined curve degree so that a pitch of the slits can be set to a predetermined value. A pull tab is received within the cavity. The centralized service assigns one or more devices to a target, and associates client information with the target. This device is dispersed throughout the lattice according to personal preference to achieve varying degrees of both function and ornamentation, with regards to protection from the elements, colors, composition, letters, numbers, embossing, etc. A shield electrode which overlaps with one of the video signal lines in plane view is arranged between the one of the video signal lines and one of the color filters, and a planarization layer is arranged between one of the pixel electrodes and the shield electrode.