Abstract: An edge lit locally dimmed display has a spatial light modulator illuminated by a light source. The light source is positioned at an edge and behind the spatial light modulator. The spatial light modulator is illuminated with a low resolution version of a desired image. The illumination may comprise a series of lighting elements that vary smoothly from one element to another at the spatial light modulator.

Abstract: A pathlength matched prism assembly is constructed from Polarizing Beam Splitter optical components having varying degrees of precision by arranging them in pathlength matched positions and fixing them to a baseplate or frame. Gaps between the optical components are sealed by the frame or adhesive sealant. Planar optical elements are inserted between the optical components and space between the components and elements is filled with an optical coupling fluid having an index of refraction that closely matches the index of refraction of both components and elements. An expansion compensation device is attached to the prism assembly to compensate of expansion and contraction of the optical coupling fluid. The prism assembly is best suited for use in HDTV and High Definition video projectors.

Abstract: A system and method are provided for selectively inferring latch elements in a circuit design from an event-driven hardware description language (HDL) file to an event-independent format. The method includes modeling the file as a plurality of data flow equations, analyzing the plurality of equations for uninitialized variables, and placing a latch at any utilized, uninitialized variable. Control signal information for an inferred latch is also derived during the data flow analysis.

Abstract: A computer is provided along with a method for testing users for alertness and mental fitness. The system and method are usable wherever there is a risk to persons, property, or the environment from individuals not fit to operate machinery or enter an work area safely, or for testing a user for dementia or other neurological impairment. The testing methods resemble computer games, but they actually measure mental fitness and alertness rather than aptitude, ability, or intelligence. The disclosed basic test is general, simple and non-intellectual, and compatible with worldwide, multilingual use. Other tests are more specifically designed to test for the ability to perform certain occupational duties or types of activities. Tests which measure neurological impairment do involve some intellectual functions such as memory. The basic test preferably comprises a plurality of yes or no questions based upon graphical data displayed to the user.