Fujitsu Siemens Computers Gmbh

Fujitsu Technology Solutions Intellectual Property Gmbh

Albertus Soemantri

Paul Von Hase

Erwin Bässler

A device arrangement includes an electronic device having a rechargeable battery and a power adapter which can be electrically coupled to the electronic device and has a converter circuit for producing at least one operating voltage (U) for the electronic device from a supply voltage from a power supply system at a voltage output, wherein the operating voltage (U) is a DC voltage, the voltage output of the electronic device and the power adapter can be connected to one another via at least one power supply line to transmit the DC voltage, and the electronic device has a monitor that monitors at least one state of the electronic device and/or of the rechargeable battery, a first controller that produces at least one control signal (S) as a function of the monitored state, and a first signal device that signals the produced signal (S) to the power adapter, which first signal device is designed to modulate a radio-frequency AC voltage signal which is associated with the control signal (S), onto the power supply line, and the power adapter has a power supply system disconnector that electrically disconnects the converter circuit from the power supply system, a second signal device that identifies a signaled control signal (S) from the first signal device, which second signal device is capacitively coupled to the voltage output and designed to demodulate the modulated control signal (S) from the radio-frequency AC voltage signal, and a second controller that operates the power supply system disconnector as a function of the identified control signal (S).

Device arrangement comprising an electronic device and a power adapter and method for connecting a power adapter

A system having a screen, in particular a flat screen, and having an external power supply unit that can be connected by a plug connector to the screen in order to supply the screen with a DC voltage. The system provides a signaling device at the power supply unit end and a comparator at the screen end for comparison of the operating parameters of the power supply unit with nominal operating parameters. A fault signaling device is provided for indicating unacceptable discrepancies between the signaled operating parameters and the stored operating parameters.

System having a screen and an external power supply unit

A method for monitoring the setting of the phase between the pixel clock rate of a graphics card and the sampling clock rate of a flat screen having an analog interface includes the steps of setting a flag if the phase of the flat screen has been set by the user. The flag is interrogated upon switching on the flat screen and/or upon a change of the video mode at a computer and/or an exchange of the graphics card and/or upon an exchange of the computer. A display is provided or a setting of the phase is initiated if, during the interrogation, it is ascertained that the flag is not set. A device for monitoring the setting of the phase between the pixel clock rate of the graphics card and the sampling clock rate of the flat screen is also provided.

Growing community of inventors

Friedberg, Germany

Albertus Soemantri