Abstract: A vehicle headlight and control system for a bus or large vehicle includes a headlight fixture with a center or low beam light source and side illumination light source operated independently. The side illumination light source may be activated when the vehicle is turning, as detected by the vehicle speed and steering shaft turn angle, to provide supplemental illumination. Both right and left side illumination sources may be provided, and may comprise LED light elements. The system may also include an audible sound generator to alert pedestrians when the vehicle is turning.

Abstract: A vehicle headlight and control system for a bus or large vehicle includes a headlight fixture with a center or low beam light source and side illumination light source operated independently. The side illumination light source may be activated when the vehicle is turning, as detected by the vehicle speed and steering shaft turn angle, to provide supplemental illumination. Both right and left side illumination sources may be provided, and may comprise LED light elements. The system may also include an audible sound generator to alert pedestrians when the vehicle is turning.

Abstract: A vehicle headlight and control system for a bus or large vehicle includes a headlight fixture with a center or low beam light source and side illumination light source operated independently. The side illumination light source may be activated when the vehicle is turning, as detected by the vehicle speed and steering shaft turn angle, to provide supplemental illumination. Both right and left side illumination sources may be provided, and may comprise LED light elements. The system may also include an audible sound generator to alert pedestrians when the vehicle is turning.

Abstract: An illuminated electronic display sign suitable for a transit vehicle comprises a support frame with a mounting surface, a plurality of lighting elements disposed on or attached to the mounting surface, and electronic circuitry configured to provide commands to selectively illuminate the lighting elements so as to create text or other information thereon. The lighting elements each comprise a semiconductor-based light source and an optical cap, each having a transparent layer portion and a diffusion layer portion. The optical caps may be generally rectangular in shape, aligned in a two-dimensional grid having rows and columns and are substantially adjacent to one another, with narrow gaps therebetween for increased display area. The optical caps may be asymmetrical, with a flat upper portion and a gradually tapering top surface to help reduce glare. A control system including wireless circuitry may be used to control multiple electronic display signs.

Abstract: A vehicle headlight and control system for a bus or large vehicle includes a headlight fixture with a center or low beam light source and side illumination light source operated independently. The side illumination light source may be activated when the vehicle is turning, as detected by the vehicle speed and steering shaft turn angle, to provide supplemental illumination. Both right and left side illumination sources may be provided, and may comprise LED light elements. The system may also include an audible sound generator to alert pedestrians when the vehicle is turning.

Abstract: A method for controlling the brightness and increasing uniformity of light generated by Lambertian surface sources has the steps of providing multiple pairs of Lambertian surface sources to produce light emitting on a target surface, each pair of Lambertian surface sources consisting of two Lambertian surface sources; rotating the two Lambertian surface sources of the same pair by a same rotation angle relative to the target surface but in opposite directions; calculating a maximum illumination and a minimum illumination corresponding to the rotation angle; determining whether a ratio of the maximum illumination to the minimum illumination is lower than a threshold; and fixing the Lambertian surface sources at the rotation angle if the ratio is lower than the threshold.

Abstract: A method for controlling the brightness and increasing uniformity of light generated by Lambertian surface sources has the steps of providing multiple pairs of Lambertian surface sources to produce light emitting on a target surface, each pair of Lambertian surface sources consisting of two Lambertian surface sources; rotating the two Lambertian surface sources of the same pair by a same rotation angle relative to the target surface but in opposite directions; calculating a maximum illumination and a minimum illumination corresponding to the rotation angle; determining whether a ratio of the maximum illumination to the minimum illumination is lower than a threshold; and fixing the Lambertian surface sources at the rotation angle if the ratio is lower than the threshold.

Abstract: The scanning device contains a seat, an image sensor at a back side of the seat, and a light generation assembly inside the seat. The light generation assembly contains at least a light generation element, at least a light bar, a lens, and a stop separated from the lens. The lens is positioned in front of the image sensor and the stop is positioned in front of the lens. The light bar at a side of the stop is positioned in front of the light generation element which in turn is at a side of the lens. The light generation element is moveably positioned so that it could be adjusted to overlap its light projected range with the range received by the lens. The image sensor therefore captures the strongest optical signal and allows for a faster scanning speed.