Abstract: A drive system for a vehicle is disclosed. The drive system has a track supported by pulleys; at least one wheel, disposed near an end of the track; and at least one flipper. The at least one flipper has at least one of a flipper track supported by flipper pulleys and a flipper wheel. A diameter of the at least one wheel is larger than a combined diameter of: each of the pulleys of the track and twice a thickness of the track.

Abstract: A backlight layer to be operatively coupled with an LCD panel, the backlight layer comprising: an illumination source configured to illuminate the LCD panel; a dual-mode infrared filter configured to filter an infrared spectrum of light emanating from the illumination source, wherein: when the dual-mode infrared filter is in an enabled mode, the dual-mode infrared filter is positioned in the path of the light emanating from the illumination source and before the light reaches the LCD panel, thereby filtering an infrared spectrum of the light, and when the dual-mode infrared filter is in a disabled mode, the dual-mode infrared filter is positioned out of the path of light emanating from the illumination source, thereby allowing a complete spectrum of the light to reach the LCD panel.

Abstract: A ground robot having a main body, two opposing drive systems, a flipper disposed distal to the main body, and a front wheel and a rear wheel, both disposed substantially parallel to the vertical plane and between the inner track and the flipper. The main body has a sagittal plane and two opposing lateral sides. Each drive system having an inner track disposed proximal to the main body. The inner track extends along a corresponding lateral side of the two opposing lateral sides and substantially parallel to a vertical plane of the main body, and is supported by a plurality of inner pulleys. The flipper extending along the corresponding lateral side and substantially parallel to the vertical plane. The flipper has a flipper body, an outer track, and a plurality of outer pulleys supporting the outer track. The diameter of the front wheel and the rear wheel of each of the opposing drive systems ranges between 1.2 to 1.3 times of a diameter of the inner track.