Patent ID: 7719741
Filing Date: 2010-05-18
Classification: A63F,G06F,Y10S

Abstract:
1. An input device operable with a system including a detector that conditionally detects the input device, the detector including a light sensor and a processor, the light sensor including a plurality of pixels in a first dimension, and a plurality of pixels in a second dimension perpendicular to the first dimension, the processor that detects the input device by processing the plurality of pixels received from the light sensor to determine a first coordinate of the input device, the first coordinate corresponding to a position on a first axis, the first axis defining the first dimension, and determine a second coordinate of the input device, the second coordinate corresponding to a position on a second axis, the second axis defining the second dimension and being perpendicular to the first axis, the input device comprising: an operation portion, a retroreflective member, and a shutter configured to move from an open position to a closed position, responsive to operation of the operation portion by a person, to disable the light sensor from receiving light from the retroreflective member, to disable the processor from determining the first and second coordinates of the input device, and configured to move from the closed position to the open position, responsive to operation of the operation portion by the person, to enable the light sensor to receive light from the retroreflective member, to enable the processor to determine the first and second coordinates of the input device.