Abstract: A track lighting system wherein a module having a plurality of LEDs mounted thereto is placed within a channel shaped rail system, the module being positionable within the rail system. A first surface of a first printed circuit board (PCB) is positioned on the bottom surface of the rail system and a pair of parallel conductive members are positioned on the second surface of the PCB. The bottom surface of the module has a plurality of spaced openings through which are inserted input power detents which contact corresponding conductive members. The power detents are connected to a circuit which converts the 24 VDC power input to a constant current; the output of the circuit being coupled to a second PCB upon which is mounted the LEDs. Openings are formed in the sides of the rail system and detents, positioned on the sides of the module, engage corresponding openings formed in the rail system sides to lock the module in position within the rail system.

Abstract: Prior art instruments for testing a display unit suffer from the disadvantage that a testing system has to be customized for each type of display unit. The present invention optical measurement system, by utilizing an optical sensor, a three-dimensional transport system and a focus lens, provides for a universal system which is adaptable to test all kinds of display units. To provide for mobility and compactness, the optical sensor, the transport mechanism, the focus lens, in addition to the electronic circuit cards for controlling the motions thereof, are all mounted within a movable cart. To ensure that all kinds of display units may be tested on the same cart, a pivotable mirror assembly is mounted to the cart, with its line of sight axis aligned, closely to the screen of any to be tested display unit, such that the output from the display unit is reflected onto the focus lens and subsequently measured by the optical sensor.