Goodrich Lighting Systems Patente

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An exterior aircraft light (20) includes a base plate (4) and a plurality of lighting units (2) arranged on the base plate, wherein each of the plurality of lighting units (2) includes an elongated LED light source (10) for emitting light, the elongated LED light source (10) having a light emitting surface with a longitudinal extension and a transverse extension, with the longitudinal extension being greater than the transverse extension and with a projection of the longitudinal extension onto the base plate (4) defining an orientation direction of the elongated LED light source, and a collimating optical system (12) for collimating the light emitted by the elongated LED light source (10) towards a main output direction, wherein the plurality of lighting units (2) has at least a first lighting unit (2-1) and a second lighting unit (2-2), with the orientation direction of the elongated LED light source (10-1) of the first lighting unit (2-1) and the orientation direction of the elongated LED light source (10-2) of the second lighting unit (2-2) being angled with respect to each other and with the main output direction of the first lighting unit (2-1) and the main output direction of the second lighting unit (2-2) being substantially parallel.

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An exterior aircraft light unit (2) includes a mounting structure (4), a plurality of first light sources (6) arranged on the mounting structure (4), and a lens cover (8) arranged over the plurality of first light sources (6), the lens cover (8) having a convex shape at least in a first cross-sectional plane, wherein the plurality of first light sources (6) are arranged in a curved pattern, with the curved pattern having the same direction of curvature as the convex shape of the lens cover (8) in the first cross-sectional plane.

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A dimmable LED reading light unit according to exemplary embodiments of the invention, in particular for a passenger transportation vehicle, such as an airplane, a ship, a bus, or a railcar, comprises an input connectable to a potentiometer (6) being supplied with a constant supply voltage and outputting a direct voltage having a voltage intensity corresponding to a selected dimming rate; an electronic measuring and control unit (20) connected to at least one LED (22) and providing an operating current to the at least one LED (22); a resistor (12) having a predetermined resistance value; and an output (24) connectable to a ground line (4); the electronic measuring and control unit (20) and the resistor (12) being connected in parallel; wherein the electronic measuring and control unit (20) is configured to measure the partial voltage applied to it and the partial load current flowing through it; to determine the resistance value of the electronic measuring and control unit (20) based on the measured partial voltage and based on the measured partial load current; to determine the equivalent resistance value of the electronic measuring and control unit (20) and of the resistor (12) based on the predetermined resistance value of the resistor (12) and based on the determined resistance value of the electronic measuring and control unit (20); to determine the resistance value of the potentiometer (6) based on the equivalent resistance value of the electronic measuring and control unit (20) and of the resistor (12), based on the measured partial voltage and based on the constant voltage supplied to the potentiometer (6); to determine the dimming rate of the potentiometer (6) based on the determined resistance value of the potentiometer (6) and based on the predetermined nominal resistance value of the potentiometer (6); and to supply driving current to the at least one LED necessary to emit light with a luminous flux corresponding to the dimming rate of the potentiometer (6).

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An exterior aircraft light unit (2) includes a mounting structure (4), an LED (18) arranged on the mounting structure (4), and an optical system (6), arranged on the mounting structure (4) for creating an output light emission distribution of the exterior aircraft light unit (2). The optical system (6) has, in a first cross-sectional plane extending through the LED (18), a first concave reflector (8) and a second concave reflector (10), each of the first and second concave reflectors (8, 10) having a proximate end positioned adjacent to the mounting structure (4) and a distal end positioned removed from the mounting structure (4), with the first and second concave reflectors (8, 10) being arranged on opposite sides of the LED (18) in the first cross-sectional plane, and a refractive optical element (16) arranged between the first and second concave reflectors (8, 10) in the first cross-sectional plane. The distal ends of both the first and second concave reflectors (8, 10) have back-tapered shapes, with the first and second concave reflectors (8, 10) curving towards each other at their distal ends.

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An exterior helicopter light unit (2) is disclosed that comprises a movable light head (4) comprising a light source, a first motor (10) and a second motor (20) for actuating the movable light head (4), and an inverse differential gear assembly (30) coupling the first and second motors (10, 20) to the movable light head (4) in such a way that the first and second motors (10, 20) can tilt and rotate the movable light head (4) in operation.

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A dimmable LED reading light unit (5), in particular for a passenger transportation vehicle, such as an airplane, a bus, a ship or a railcar, is disclosed that comprises a dimming module (6) and an LED module (14), connected in series; the dimming module (6) having an input (8) being connectable to a power supply (2) supplying direct voltage, the dimming module (6) comprising a potentiometer (10) allowing to select a dimming rate and a current controller (12) providing an operating current for the LED module (14), the operating current corresponding to the dimming rate of the potentiometer (10); the LED module (14) comprising at least one LED (16) and a current consumer (18) connected in parallel; and wherein the current controller (12) is configured to supply direct current to the LED module (14) that substantially corresponds to the sum of the driving current necessary for driving the at least one LED (16) to emit light with an intensity of illumination corresponding to the dimming rate of the potentiometer (10), and the current consumption of the current consumer (18).

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A light for an aircraft comprises a holder (18, 11,, 218, 318) for carrying a plurality of light emitting diodes (20, 120, 220, 320) arranged along a curvilinear line and a first optical unit (14, 114, 214, 314) comprising an elliptic reflective partial surface defining a plurality of focal points (30, 130, 230, 330) forming a first curvilinear focal line extending along the light emitting sites of the light emitting diodes (20, 120, 220, 320), and a plurality of second focal points (32, 132, 232, 332). The light further includes a second optical unit (16, 116, 216, 316) comprising a single further focal point or a plurality of further focal points forming a further curvilinear focal line. The plurality of the second focal points (32, 132, 232, 332) of the first optical unit (14, 114, 214, 314) coincide and are identical to the single further focal point of the second optical unit (16, 116, 216, 316) or are located along the further curvilinear focal line of the second optical unit (16, 116, 216, 316).

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