Patent ID: 9275610
Filing Date: 2016-03-01
CPC Classification: A63F,G06K,G09G

Claim Text:
1. An object tracking apparatus, comprising: a reference object having a plurality of light emitting devices, wherein the plurality of light emitting devices are sequentially turned on at different timings, for generating an optical signal; an optical sensor for detecting the optical signal and generating an identification signal in response to the optical signal; and a controller for generating a control signal according to the identification signal and outputting the control signal to the reference object, thereby adaptively adjusting a light emitting number or light emitting intensity of the plurality of light emitting devices; wherein, by sequentially turning on the plurality of light emitting devices at different timings, the plurality of light emitting devices form a different shape when the optical sensor and the reference object are relatively rotated with respect to each other at every different rotation angle, whereby the controller identifies a relative rotation between the optical sensor and the reference object.