Abstract: A Near-Eye-Display (NED) device includes a computing architecture that is physically split across multiple locations to ergonomically locate a center of gravity (CG) with respect to a user's head. Subsets of computing components are physically non-contiguous, so their weight is dispersed around a user's head rather than being concentrated in a single location forward of the user's face. This causes the CG of the NED device to be more ergonomically located on the user's head relative to conventional NED devices. Ergonomically locating the CG of the NED device is a direct reduction in the amount of the physical strain that is placed on the user's neck as compared to conventional NED devices—even if the weight of the NED devices in the same.

Abstract: An electronic device is configured with sub-assemblies including a main logic board, flexible printed circuit, and dual battery packs that are assembled together with electrical connectors to enable power from the battery packs to flow over a power bus that is distributed along the flexible printed circuit and main logic board. A protection circuit module (PCM) in each battery pack is configured to determine a state of each of the connections among the sub-assemblies (i.e., whether or not properly assembled to provide electrical continuity through the connector) so that power from the battery packs is switched on to the power bus only when electrical continuity is verified at each of the connectors. In the event that any connection is faulty, for example due to a misalignment of a connector during assembly that prevents electrical continuity to be established through a connector, neither PCM will switch power on to the power bus.

Abstract: An electronic device is configured with sub-assemblies including a main logic board, flexible printed circuit, and dual battery packs that are assembled together with electrical connectors to enable power from the battery packs to flow over a power bus that is distributed along the flexible printed circuit and main logic board. A protection circuit module (PCM) in each battery pack is configured to determine a state of each of the connections among the sub-assemblies (i.e., whether or not properly assembled to provide electrical continuity through the connector) so that power from the battery packs is switched on to the power bus only when electrical continuity is verified at each of the connectors. In the event that any connection is faulty, for example due to a misalignment of a connector during assembly that prevents electrical continuity to be established through a connector, neither PCM will switch power on to the power bus.