Patent ID: 7055994
Filing Date: 2006-06-06
Classification: B64D,F21W,H05B

Abstract:
1. A dual mode light unit for an aircraft, said unit comprising: light control circuitry configured to be operatively connected with wiring connecting with pilot interface circuitry so as to receive an electrical current therefrom, a visible navigational light source connected with the light control circuitry, and an infrared light source connected with the light control circuitry, said light control circuitry, when the electrical current is in a first electrical state, supplying power to the visible navigational light source and, when the electrical current is in a second state, causing the visible light source to produce substantially no visible light and supplying power to the infrared light source so that the infrared light source pulses in a first time dependent pattern, and said pattern having pulses or intervals between pulses of two or more different durations.