A memory card and a terminal, where the memory card includes a storage device, a controller, and a memory card interface. The storage device and the controller are disposed inside a card body of the memory card. The memory card interface is disposed on the card body of the memory card. The controller is electrically coupled to the storage device and the memory card interface separately. Because a shape of the memory card is the same as that of a nano subscriber identity module (SIM) card, and a size of the memory card is the same as that of the nano SIM card, a nano SD card is provided.

A moisture absorbing sensor is provided that includes a hygroscopic material that maintains a shape before and after moisture absorption and maintains a hygroscopic state for a predetermined time or more after moisture absorption; and an electrode disposed in the hygroscopic material. Moreover, an electrical characteristic of a circuit formed by the electrode and the hygroscopic material changes according to a moisture absorption amount of the hygroscopic material.

An electronic device is disclosed that comprises a substrate and an electronic circuit with a layer between them. The layer comprises an electrically insulating medium containing a spatial distribution of conductive elements. The electronic circuit comprises memory contacts arranged for electrical connection to a corresponding contact on the substrate when at least one of the conductive element forms a connection between a memory contact and the corresponding contact but for electrical insulation from the corresponding contact when no conductive elements forms such a connection. A selection of the memory contacts, that is at least partially random, is thus electrically connected to the corresponding contact on the substrate. Memory circuitry is configured to store a representation of a respective electrical connection status of the memory contacts.

In some embodiments, an RFID device may include a multilayer reactive strap having a first substrate, a first conductor portion, a second conductor portion, and a first connection. The first conductor portion may enclose a first area and may be disposed on a first side of first substrate. A second conductor portion may enclose a second area and may be disposed on a second side of the first substrate. A first connection may couple the first conductor portion and the second conductor portion together, and may thereby form a multiturn coil that includes both the first conductor portion and the second conductor portion.

Disclosed is a slot-type ultra-wideband depolarized chipless RFID tag. The tag comprises a tag slot unit, a metal plate and a dielectric substrate, wherein the tag slot unit is formed by means of etching the metal plate, and is located on the upper surface of the dielectric substrate; the tag slot unit is composed of at least four annular slot groups, and tags are distributed in a centrosymmetric manner; and each annular slot group is composed of four concentric annular slots that are distributed in a nested manner; a transceiver antenna TX transmits a horizontally polarized electromagnetic wave; a scattered wave obtained; a transceiver acquires a frequency spectrum of the scattered wave; the spectrum is converted into a time-domain signal; a response of the tag is extracted; and an MFCC feature of the time-domain signal is extracted.

In some embodiments, a method of constructing a coil antenna structure may include forming a coiled antenna by cutting a spiraling gap into a conductive layer, applying a force to at least a part of the conductive layer to expand the gap between coils of the conductive layer to a distance great enough to prevent conductive sections of the coils from touching each other.

In one embodiment, an RFID device is disclosed that contains a first conductive structure and a second conductive structure formed from multiple conductive materials configured to move between a first operating condition and a second operating condition when exposed to an event or other stimuli. The second conductive structure is initially operatively coupled to the first conductive structure in the first operating condition. However, after exposure to the event, the first conductive structure is altered to change the behavior of the RFID device. The RFID device is attachable to a substrate, such as a garment or a fabric, and the event may be a single or multiple occurrence event, such as washing, stretching, heating, or exposure of the RFID device to electrical signals.

Systems and methods for counter resynchronization can include one or more servers each including a memory and one or more processors. The one or more servers can be in data communication with a transmitting device. The one or more processors can be configured to determine one or more reset events. The one or more processors can be configured to generate a resync value. The one or more processors can be configured to transmit, via one or more scripts, the resync value to the transmitting device according to one or more prioritization factors and in response to the one or more reset events. The one or more processors can be configured to replace the counter value with the resync value in accordance with the one or more prioritization factors.

A physical card may include a substantially planar body that may include a front surface, a back surface, and one or more side surfaces. The front surface may include a background formed primarily in a first color, and a plurality of embossed characters each having one or more front surfaces aligned substantially in parallel relative to the background. The plurality of embossed characters may include one or more side surfaces extending from the background at a lower edge to the front surface at an upper edge, wherein the one or more front surfaces of at least a first embossed character of the plurality of embossed characters are formed primarily in a second color different from the first color and the one or more side surfaces of at least the first embossed character are formed primarily in the first color to limit a viewing angle of the plurality of embossed characters.

A display device is disclosed that includes a plurality of pixels and a plurality of code pixels. The pixels include light-emitting elements, which display an image. The code pixels are disposed in the same layer as the pixels and are adjacent to a reference point disposed between the pixels. The code pixels include infrared light-emitting elements, which emit infrared light. At least one of the code pixels, disposed in a particular direction from the reference point, emit the infrared light to provide a code pattern having position information.