08638320 is referenced by 30 patents and cites 499 patents.

Stylus orientation detection is disclosed. In an example, the orientation of a stylus relative to a contacting surface, e.g., a touch panel, can be detected by detecting a capacitance at one or more locations on the stylus relative to the surface, and then using the capacitance(s) to determine the orientation of the stylus relative to the surface. In another example, the orientation of a stylus relative to a contacting surface, e.g., a touch panel, can be detected by first detecting the orientation of the stylus relative to a reference, detecting the orientation of the contacting surface relative to the reference, and then calculating the orientation of the stylus relative to the contacting surface using the two detected orientations.

Title
Stylus orientation detection
Application Number
13/166743
Publication Number
8638320 (B2)
Application Date
June 22, 2011
Publication Date
January 28, 2014
Inventor
Steven Porter Hotelling
Los Gatos
CA, US
Debanjan Mukherjee
San Jose
CA, US
Li Quan Tan
Sunnyvale
CA, US
Jonah A Harley
Mountain View
CA, US
Agent
Morrison & Foerster
Assignee
Apple
CA, US
IPC
G06F 3/033
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