Abstract: A TIR collimator for an LED light source includes a body portion having a reflective surface, wherein the reflective surface includes a plurality of segments. Respective segments of the reflective surface have corresponding cross-sectional profiles defined by different low-order polynomial functions, such that the overall cross-sectional profile of the reflective surface constitutes a spline, i.e., a piecewise polynomial function. The respective segments are configured to achieve substantial collimation of the output light. In one example, the cross-sectional profiles of adjacent segments of the reflective surface are defined by different low-order polynomials. Additionally, two or more adjacent segments may have respective cross-sectional profiles which together are defined by a Bezier curve, so as to provide smooth transitions between adjacent segments of the spline reflective surface.

Abstract: A lamp housing assembly as provided which includes a lamp housing and a shield. The shield includes a first portion which extends into the cavity of the lamp housing and a second portion which extends out of the lamp housing. The first portion extends to a blocking end adapted to be positioned adjacent to a lamp disposed within the lamp housing cavity. The second portion includes an attachment end coupled to the lamp housing external of the lamp housing cavity.

Abstract: A data processing system includes a processor unit (CPU) connected over a CPU bus to a plurality of memory components, but is not connected to any input-output (I/O) component of the system. The system I/O component(s) connect to the memories over an I/O bus. A method and apparatus is disclosed for selecting one of the memories to be used for communications between the processor unit and the I/O components. Also, a method for determining which I/O components are in the system.