US Patent 10267630 Visual altimeter for skydiving

An altitude display device is provided for use when skydiving. The altitude display device may include an altimeter operative to determine an altitude of the altimeter and to generate an altitude signal representative of the determined altitude. The altitude display device may additionally include a visual display in operative communication with the altimeter to receive the altitude signal, with the visual display emitting a visual display signal at a rate that is imperceptible to a human user, and having a color representative of the altitude signal. The visual display signal may be variable in color within a prescribed color range associated with a prescribed altitude range, such that a change in altitude within the prescribed altitude range, as determined by the altimeter, correlates to a change in color of the visual display signal emitted by the visual display within the prescribed color range.