Patent ID: 7447442
Filing Date: 2008-11-04
Classification: H04B

Abstract:
1. A light-emitting device, comprising: at least one driver unit for generating a modified current based on an externally entered information signal; and at least one light-emitting unit operatively and functionally coupled to said at least one driver unit for receiving said modified current and emitting a modified signal light, said modified signal light comprising a modification of a non-signal illumination light, said modification comprising an optical signal that corresponds to said externally entered information signal, wherein said modified signal light and said non-signal illumination light are emitted at different time periods, said modified signal light not causing perceptible flickering illumination light, wherein said at least one light-emitting unit comprises at least one electroluminescence element and first and second light-emitting unit groups, the first light emitting unit group being capable of emitting said non-signal illumination light and the second light emitting unit group being capable of emitting said modified signal light, wherein said at least one driver unit comprises a first driver unit electrically coupled to said first light-emitting unit group for supplying said first light-emitting unit group with a first modified current upon entry of said externally entered information signal or a first non-modified current upon non-entry of any information signal and a second driver unit electrically coupled to said second light-emitting unit group for supplying said second light-emitting unit group with a second modified current upon entry of said externally entered information signal or a second non-modified current upon non-entry of any information signal, wherein said first and second light-emitting unit groups are electrically coupled in opposite polarities to each other to an AC-power supply, and each of said first and second light-emitting unit groups emits said modified signal light and said non-signal illumination light alternately.