Position digitizing using an optical stylus to image a display
First Claim
Patent Images
1. A digitizer system comprising:
- a display device comprising a plurality of pixels;
an optical stylus configured to image the pixels within a field of view; and
electronics in communication with the optical stylus and configured to count a number of pixels passing through the field of view and to determine a distance and direction of travel of the optical stylus based on the counted number and a direction of the pixels passing through the field of view.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides systems and methods of using an stylus that houses optics and a detector capable of imaging display pixels. Stylus position is determined according to the number and direction of imaged pixels passing through the field of view of the stylus optics. Stylus orientation, including rotation and tilt, stylus height, stylus contact state, and stylus pressure may also be determined.
63 Citations
19 Claims
-
1. A digitizer system comprising:
-
a display device comprising a plurality of pixels; an optical stylus configured to image the pixels within a field of view; and electronics in communication with the optical stylus and configured to count a number of pixels passing through the field of view and to determine a distance and direction of travel of the optical stylus based on the counted number and a direction of the pixels passing through the field of view. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A method of detecting stylus position relative to a pixilated display device comprising the steps of:
-
imaging the display pixels using optics and a detector housed by the stylus, the optics and detector providing a field of view; and obtaining stylus position relative to a reference point by counting a number of pixels passing through the field of view and by determining a direction of the pixels passing through the field of view. - View Dependent Claims (15, 16, 17, 18, 19)
-
Specification