Methods and systems are provided for power management in communication devices, particularly based on cable connectivity. A power management component in a system may be configured to obtain measurements associated with a signal path used for communication by the system via a communication port, and manage power use in the system based on the obtained measurement. Managing the power use may include determining, based on the obtained measurements, connectivity related information associated with connectivity of the system via the communication port, and applying based on the information one or more power use reduction measures, with the one or more power use reduction measures including at least transitioning between different power related states.

An embodiment of the present disclosure relates to a power supply interface comprising: a converter delivering a first DC voltage; a resistor connected between the converter and an output terminal of the interface delivering a second DC voltage; a first circuit delivering a second signal representative of a difference between the second DC voltage and a voltage threshold when a first signal is in a first state, and at a default value otherwise; a second circuit delivering a third signal representative of a value of a current in first resistor multiplied by a gain of the third circuit, and modifying the gain based on the second signal; and a third circuit configured to deliver a signal for controlling the converter based at least on the third signal.

The embodiments provide a cryptography key for two communicating devices that is based on information known only to the devices. The information may only be determined by the devices. Each device determines the information without communicating key information related to the encryption key with the other. Channel characteristic reciprocity between the devices allows creation of identical keys in each device. Each device sends a signal to the other device at the same power level based on the distance between the devices. The power level may be set to result in a target receive power level at the other device. Each device samples the received signal, generates sampling results, creates a key based on the sampling results and a threshold power level, and utilizes the key. The threshold power level may be based on the target receive power level, or a median power determined from the sampling results.

A computing device includes signal generation circuitry and also includes a location on the computing device that is operative to couple a signal generated by the signal generation circuitry into a user. For example, the computing device includes signal generation circuitry that generates a signal that includes information corresponding to a user and/or an application that is operative within the computing device. The signal generation circuitry couples the signal into the user from a location on the computing device based on a bodily portion of the user being in contact with or within sufficient proximity to the location on the computing device that facilitates coupling of the signal into the user. Also, the signal may be coupled via the user to another computing device that includes a touchscreen display that is operative to detect and receive the signal.

A power adapter for a computing device includes a housing, first and second physical connections, a power transformer, one or more input/output (I/O) ports, and a data connection. The first physical connection is exposed at the housing to connect to the computing device to provide device power to the computing device. The second physical connection is exposed at the housing to connect to an alternating current (AC) mains power source to receive AC mains power, without an intermediary power transformer between the AC mains power source and the power adapter. The power transformer is disposed within the housing to convert the AC power to the device power. The I/O ports exposed at the housing to connect to peripheral devices. The data connection is to communicatively connect the peripheral devices to the computing device.

A standby power controller (SPC) supplies power to an appliance such as a television, and cuts power to the appliance if the appliance is going unused. The SPC includes first and second sensors, each detecting a type of user activity (such as user presence and remote control usage), and a switch which controls power to the appliance in dependence on the detection status of the first and second sensors, and also preferably in dependence on the prior detection status of at least one of the sensors at one or more points of time in the past.

A communication device includes an interface connector for connecting to a computing circuit to receive a media data and an external power supply, a transmission circuit, wherein the circuit transmits the media data to a network, a battery power supply, a controller circuit powered by the battery power supply, a sensor, communicatively coupled to the controller circuit, for detecting a movement of the communication device, a switch circuit for switchably connecting the battery power supply to the transmission circuit responsive to a first switch control signal, and a test circuit, communicatively coupled to the controller circuit, for generating the first switch control signal based on an external power control signal indicating whether the interface connector is connected to the computing circuit and a motion detection signal indicating whether the sensor detects the movement of the communication device.

An electronic device, according to various embodiments, comprises: a battery connecting circuit; a charging circuit for supplying power supplied from an external electronic device to a component and battery of the electronic device; and a processor. The processor may be configured to: in a first state in which the electronic device of which the battery is not connected to the battery connecting circuit receives power from the external electronic device, measure the voltage of the battery when it is confirmed that the battery is connected to the battery connecting circuit; and after confirming the capacity of the battery on the basis of the measured voltage, switch to a second state in which the charging circuit supplies power from the external electronic device to the battery connected to the battery connecting circuit. Various other embodiments may be provided.

A method and apparatus to assist people with hearing loss. An augmented reality device with microphones and a display captures speech of a person talking to the wearer of the device and displays real-time captions in the wearer's field of view, while optionally not captioning the wearer's own speech. The microphone system in this apparatus inverts the use of microphones in augmented reality devices by analyzing and processing environmental sounds while ignoring the wearer's own voice.

The device, method, and system embodiments described in this disclosure (i.e., the teachings of this disclosure) enable an authorization circuit having at least one authorization mechanism to cooperate with an access circuit having at least one key mechanism. Upon successfully authorizing at least one datum communicated from the key mechanism of the access circuit, the authorization circuit is arranged to deliver power having determined characteristics to the access circuit. In at least one embodiment, the authorization circuit is arranged as a circuit wired or wirelessly coupled to a power infrastructure in a building. In at least one embodiment, the access circuit is arranged as a smart power plug arranged to temporarily deliver power to a mobile computing device or other electrically powered device. In some cases, power is only delivered after a user consumes certain multimedia information. In some cases, power that is delivered is delivered for only a short time and is measured.