Abstract: A method for transmitting message frames, comprising: generating, by an end device comprising a processor, a first message frame portion comprising a first plain header; obtaining a device identifier (DevEUI) and a header blinding key (HdrBKey); generating a first header mask using the DevEUI and the HdrBKey; obtaining a first blinded header by applying the first header mask to the first plain header; obtaining a first updated message frame portion by updating the first message portion using the first blinded header; generating a first blinded message frame comprising the first updated message frame portion; and transmitting the first blinded message frame to a network gateway.

Abstract: Circuit and method for controlling a liquid crystal segment (1) display wherein the shape of the control signals of the segments (e1, e2, b1, b2) is adapted according to a supply voltage (Vdd) so as to compensate at least partially the opacity variations caused by the supply voltage variations.

Abstract: Electronic circuit designed to control the level of lighting produced by light diodes in a flat screen. The circuit uses a PDM modulator in order to generate a control signal (Vc) with a number of pulses by period that depends on the desired level of lighting. The advantage is to reduce the energy in the low frequencies.