Patent ID: 7284870

Claim:
A lighting apparatus, comprising: a plurality of light emitting devices configured to illuminate an object from positions peripheral to the object, the plurality of light emitting devices being disposed in a formation comprising a plurality of arcuate segments, each segment comprising a plurality of light emitting devices, wherein the plurality of arcuate segments are arranged in a generally frusto-conical shape such that the plurality of light emitting devices form a plurality of concentric circles; and a controller configured to receive a multi-dimensional input signal from a multi-dimensional data input device and to individually control illumination of each of the segments based on the received multi-dimensional input signal, wherein the controller comprises an illuminance distribution setter that sets a lighting center as an origin and sets a center of each segment as a segment center, the illuminance distribution setter setting a respective illuminance distribution corresponding to each segment on a XY coordinate plane, the illuminance of each segment being set to a maximum value when a point on the XY coordinate plane is on a lighting optical-axis that connects the lighting center and segment centers, and the illuminance of each segment decreasing from the maximum value when the point recedes from the lighting optical-axis.