METHOD AND APPARATUS FOR NAVIGATING SURFACE

PROBLEM TO BE SOLVED: To solve a problem wherein an image-based light sensor cannot perform well on some surfaces such as a glass surface, and to improve the navigation performance of a mouse with an image-based light sensor. SOLUTION: A surface is navigated by using a first light sensor mounted to...

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Hauptverfasser: CHANG LYE HOCK BERNARD, LAKSHMANAN SRINIVASAN
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creator CHANG LYE HOCK BERNARD
LAKSHMANAN SRINIVASAN
description PROBLEM TO BE SOLVED: To solve a problem wherein an image-based light sensor cannot perform well on some surfaces such as a glass surface, and to improve the navigation performance of a mouse with an image-based light sensor. SOLUTION: A surface is navigated by using a first light sensor mounted to a navigation device to detect light reflected from the surface, and using outputs of the first light sensor over time to determine the relative movement of the navigation device with respect to the surface. While using the first light sensor, if the outputs of the first light sensor over time are not indicating movement of the navigation device with respect to the surface, a second light sensor that is mounted to the navigation device, and of a different type than the first light sensor, is used to detect light reflected from the surface, and outputs of the second light sensor over time are used to determine the relative movement of the navigation device with respect to the surface. COPYRIGHT: (C)2008,JPO&INPIT
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subjects CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
MEASURING
MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK
PHYSICS
TESTING
title METHOD AND APPARATUS FOR NAVIGATING SURFACE
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