Abstract: Method for determining a light-emission capacity of a light emitting diode, referred to as a LED. The method includes the following steps: reverse biasing the LED so as to cause an accumulation of an electric charge by the LED, said LED being subjected to a light source incident to the LED; causing a discharge of the electric charge accumulated by the LED; obtaining a value representing a time taken for discharging the charge from the LED; determining the light-emission capacity of the LED according to the discharge time obtained.

Abstract: Method for determining a light-emission capacity of a light emitting diode, referred to as a LED. The method includes the following steps: reverse biasing the LED so as to cause an accumulation of an electric charge by the LED, said LED being subjected to a light source incident to the LED; causing a discharge of the electric charge accumulated by the LED; obtaining a value representing a time taken for discharging the charge from the LED; determining the light-emission capacity of the LED according to the discharge time obtained.

Abstract: An audio appliance includes two external connections for connection to external loudspeakers, and includes means for establishing an electrical signal between the external terminals that is representative of an audio source in order to inject an excitation electric current into each external loudspeaker. Means are provided for incorporating a component at a “detection” frequency that is situated outside the audible spectrum in the electrical signal that is established between the external terminals, together with means for detecting an electric current flowing between the external terminals and having a frequency corresponding to the detection frequency. This is applicable in particular to systems comprising a mobile appliance and a fixed docking station incorporating a woofer and designed to receive the mobile appliance.

Abstract: An audio appliance includes two external connections for connection to external loudspeakers, and includes means for establishing an electrical signal between the external terminals that is representative of an audio source in order to inject an excitation electric current into each external loudspeaker. Means are provided for incorporating a component at a “detection” frequency that is situated outside the audible spectrum in the electrical signal that is established between the external terminals, together with means for detecting an electric current flowing between the external terminals and having a frequency corresponding to the detection frequency. This is applicable in particular to systems comprising a mobile appliance and a fixed docking station incorporating a woofer and designed to receive the mobile appliance.