Patent application number | Description | Published |
20120080954 | ENHANCED POWER IN HDMI SYSTEMS - There is provided a source device, which is adapted to communicate with a sink device through an HDMI cable. The sink device comprises an internal circuit, handshaking circuitry adapted to verify if the sink device is able to supply a current on a line of the HDMI cable, an internal power supply intended for powering the line and a switching circuit able to uncouple the internal power supply from the line and able to couple the internal circuit to the line. There is also provided a sink device, which is adapted to communicate with a source device through an HDMI cable. The sink device comprises a power supply, hand-shaking circuitry able to indicate that the sink device is able to supply a current on a line of said HDMI cable, and a circuit able to couple the power supply to the line. | 04-05-2012 |
20120235513 | DEVICE FOR SUPPLYING ELECTRIC POWER TO A MOBILE TELECOMMUNICATION EQUIPMENT, AND PORTABLE EQUIPMENT USING THE SAME - An electric power supply circuit that provides electric power to a mobile telecommunication device is provided. The electrical power supply circuit can be plugged in to a power grid or receive transformed energy from an alternate energy source. The electrical power supply circuit may provide converted electrical energy to a mobile telecommunication device from the power grid, the transformed energy or a rechargeable battery. Further, the electrical power supply can charge the rechargeable battery from either or both the electrical power grid or the transformed energy. A management module assesses the available electrical sources and the state of the electrical sources so as to switch an appropriate electrical power source to be input to the mobile telecommunication device. | 09-20-2012 |
20130234592 | Circuit for Retro-Lighting a Display - There is described a circuit for retro-lighting a display, comprising a group of white light-emitting diodes connected in series between a first node and a second node and a circuit for driving said group of series-coupled light-emitting diodes comprising: a power supply providing a positive voltage supplied to the first node; and a charge pump converter providing a negative voltage obtained from the positive voltage, said negative voltage being supplied to the second node. | 09-12-2013 |
20150025822 | BATTERY DC IMPEDANCE MEASUREMENT - The state of charge of a rechargeable battery is determined by calculating the DC impedance of the battery. The impedance is calculated by: performing a two different constant current discharges of the battery at a first and second C-rates, respectively; measuring the voltage and current during the interval of each constant current discharge and calculating the amount of charge extracted from the battery up to a point where the battery voltage drops to a threshold value; calculating the state of charge of the battery; and calculating the DC impedance of the battery as a function of the difference between the battery voltages and discharge currents for the two different discharges. | 01-22-2015 |
20150025823 | TEMPERATURE-COMPENSATED STATE OF CHARGE ESTIMATION FOR RECHARGEABLE BATTERIES - The remaining state of charge of a rechargeable battery is calculated by: measuring the instantaneous voltage, impedance and temperature of the battery, and then inputting the measured voltage, impedance and temperature values into an equation, wherein the equation yields a state of charge value that is a function of the said measured voltage, impedance and temperature values. | 01-22-2015 |