Patent ID: 9407305
Filing Date: 2016-08-02
CPC Classification: H04B

Claim Text:
1. An instruction beam detection apparatus, comprising: an image capturing unit having a global shutter for capturing an image of an instruction beam intermittently irradiated from a light source of a remote control device within a detection range thereof at a timing instructed externally with the global shutter; a filter unit for attenuating light irradiated on the image capturing unit in at least one of a short wave length range and a long wave length range relative to a wave length range of the instruction beam; a control unit for detecting an illumination cycle of the instruction beam according to the image captured with the image capturing unit so that the image capturing unit is controlled to capture the image at a timing synchronized with an irradiation timing of the instruction beam irradiated from the light source; and a detection unit for detecting a position of the instruction beam on a third image according to the third image captured with the image capturing unit in a state that the control unit controls the image capturing unit to capture the third image at a controlled image capturing timing, wherein said control unit is configured to detect the illumination cycle adjusted such that a cumulative intensity of light in a wave length range different from that of the instruction beam becomes smaller than a specific value within one cycle during which the image capturing unit captures the third image.