NAVIGATION DEVICE AND IMAGE DISPLAY SYSTEM
First Claim
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1. A navigation device, operating on a work surface, the navigation device comprising:
- an image sensor configured to successively capture image frames of the work surface;
a processing unit configured to calculate displacements of the navigation device with respect to the work surface according to the image frames;
an output interface configured to output the displacements at a report rate; and
an inertial unit configured to analyze a plurality of displacements within a predetermined period and provide an inertial displacement for being outputted by the output interface when at least one of the displacements within the predetermined period is larger than a threshold and the displacements decrease to zero within the predetermined period.
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Abstract
There is provided an image display system including a navigation device and an inertial unit. The navigation device outputs displacements at a report rate. The inertial unit may provide an inertial displacement for continuously controlling a cursor motion after the displacements decrease to zero.
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Citations
20 Claims
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1. A navigation device, operating on a work surface, the navigation device comprising:
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an image sensor configured to successively capture image frames of the work surface; a processing unit configured to calculate displacements of the navigation device with respect to the work surface according to the image frames; an output interface configured to output the displacements at a report rate; and an inertial unit configured to analyze a plurality of displacements within a predetermined period and provide an inertial displacement for being outputted by the output interface when at least one of the displacements within the predetermined period is larger than a threshold and the displacements decrease to zero within the predetermined period. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An image display system, comprising:
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an image display device, comprising; a screen displaying a cursor; and a host configured to control images displayed by the screen; and a navigation device, comprising; an image sensor configured to successively capture image frames of a work surface; a processing unit configured to calculate displacements of the navigation device with respect to the work surface according to the image frames; an output interface configured to output the displacements to the host at a report rate to allow the host to control the cursor according to the displacements; and a multi-cursor switch configured to generate a control signal for controlling the host to display a plurality of sub-cursors around the cursor and separated by a predetermined pixel distance. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. An image display system, comprising:
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a navigation device outputting displacements at a report rate; and an image display device, comprising; a screen displaying a cursor; and a host comprising an inertial unit configured to analyze a plurality of displacements received from the navigation device within a predetermined period, and the host being configured to control the cursor with an inertial displacement when at least one of the displacements within the predetermined period is larger than a threshold and the displacements decrease to zero within the predetermined period. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification