Patent Document ID: 8742894
Application ID: 12598022
Patent Flag: 1

Claim One:
1. A lighting device ( 10 ; 42 ) comprising: a radio receiver circuit ( 24 ); search means ( 20 ) co-operating with the radio receiver circuit to detect and identify neighboring objects ( 34 , 36 , 38 , 40 ) present in the proximity of the device, these neighboring objects being themselves provided with radio transmitter circuits suitable for interfacing with said radio receiver circuits; and control means suitable for causing a light source ( 12 ) to switch off; the device being characterized in that the control means: co-operate with the search means ( 20 ) to: detect the appearance and the disappearance of said neighboring objects in the radio range of the lighting device; and cause the light source to switch off upon detecting the disappearance of at least one neighboring object, conditionally as a function of predetermined switch-off criteria; and operate essentially without a switch-off order being transmitted from the neighboring objects to the device; wherein the search means are also adapted to determine an internal state associated with a corresponding object ( 10 , 36 , 46 ), and the control means are also adapted to inhibit or to trigger the switching on and/or off of the light source conditionally as a function of said internal state and further wherein said corresponding object is a mobile object of the portable computer type ( 36 ), and said internal state is the active or standby state of said computer.