Object orientation detection with a digitizer
First Claim
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1. A digitizer controller comprising:
- a circuit configured to;
sample outputs from a plurality of column sensor lines and from a plurality of row sensor lines of a digitizer sensor to detect a first signal emitted from a first transmitter and a second signal emitted from a second transmitter, wherein the first transmitter and the second transmitter are fixed on a stylus and wherein the first transmitter is displaced from the second transmitter by a pre-defined distance;
determine based on the outputs a first area on the digitizer sensor that received the first signal and a second area on the digitizer sensor that received the second signal;
select first coordinates within the first area;
select second coordinates within the second area;
determine distance along the digitizer sensor between the first coordinates and the second coordinates; and
determine angle of the stylus with respect to the digitizer sensor based on comparing the pre-defined distance to the distance determined along the digitizer sensor.
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Abstract
A digitizer system includes a stylus comprising a plurality of transmitters for transmitting signals, wherein each of the plurality of transmitters are distanced from one another by a defined distance, a digitizer sensor operable for sensing signals transmitted by the plurality of transmitters, and circuitry associated with the digitizer sensor for tracking a projected location on the digitizer sensor of each of the plurality of transmitters based on the signals sensed, and for tracking a geometric relationship between the projected locations.
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Citations
20 Claims
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1. A digitizer controller comprising:
a circuit configured to; sample outputs from a plurality of column sensor lines and from a plurality of row sensor lines of a digitizer sensor to detect a first signal emitted from a first transmitter and a second signal emitted from a second transmitter, wherein the first transmitter and the second transmitter are fixed on a stylus and wherein the first transmitter is displaced from the second transmitter by a pre-defined distance; determine based on the outputs a first area on the digitizer sensor that received the first signal and a second area on the digitizer sensor that received the second signal; select first coordinates within the first area; select second coordinates within the second area; determine distance along the digitizer sensor between the first coordinates and the second coordinates; and determine angle of the stylus with respect to the digitizer sensor based on comparing the pre-defined distance to the distance determined along the digitizer sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A digitizer controller comprising:
a circuit configured to; sample outputs from a plurality of column sensor lines and from a plurality of row sensor lines of a digitizer sensor to detect a first signal emitted from a first transmitter associated with a tip of a stylus and a second signal emitted from a second transmitter, wherein the first transmitter and the second transmitter are fixed on the stylus and wherein the first transmitter is displaced from the second transmitter by a pre-defined distance; distinguish between the first signal emitted from the tip of the stylus and the second signal; determine based on the outputs a first area on the digitizer sensor that received the first signal and a second area on the digitizer sensor that received the second signal; select first coordinates within the first area; select second coordinates within the second area; determine distance along the digitizer sensor between the first coordinates and the second coordinates; and determine angle of the stylus with respect to the digitizer sensor based on comparing the pre-defined distance to the distance determined along the digitizer sensor. - View Dependent Claims (16, 17, 18, 19, 20)
Specification