Patent ID: 9020666
Filing Date: 2015-04-28
Classification: G01S,G05D,G08G

Abstract:
1. A taking-off and landing target instrument to be used in an automatic taking-off and landing system, comprising a target having a taking-off and landing surface, providing light emitting elements for displaying patterns and a target control unit for selectively controlling light emission of each of said light emitting elements, wherein said light emitting elements are provided on said taking-off and landing surface in a two dimensional arrangement, wherein a target mark having the center of pattern under all turned-on status is formed by turning on all of said light emitting elements and different predetermined two dimensional patterns may be formed by turning on different subsets of said light emitting elements, and wherein said target control unit controls a light emission so as to display firstly said all turned-on pattern by turning on all of said light emitting elements, and next, so as to display a predetermined two dimensional pattern by turning on a subset of said light emitting elements, wherein said patterns are formed by light emitted by said light emitting elements.