08259240 is referenced by 13 patents and cites 80 patents.

High-resolution, scalable multi-touch sensing display systems and processes based on frustrated total internal reflection employ an optical waveguide that receives light, such as infrared light, that undergoes total internal reflection and an imaging sensor that detects light that escapes the optical waveguide caused by frustration of the total internal reflection due to contact by a user. The optical waveguide when fitted with a compliant surface overlay provides superior sensing performance, as well as other benefits and features. The systems and processes described provide true multi-touch (multi-input) and high-spatial and temporal resolution capability due to the continuous imaging of the frustrated total internal reflection that escapes the entire optical waveguide. Among other features and benefits, the systems and processes are scalable to large installations.

Title
Multi-touch sensing through frustrated total internal reflection
Application Number
13/430484
Publication Number
8259240 (B2)
Application Date
March 26, 2012
Publication Date
September 4, 2012
Inventor
Jefferson Y Han
Holliswood
NY, US
Agent
Fish & Richardson P C
Assignee
Perceptive Pixel
NY, US
IPC
G06F 3/042
G02B 6/00
G02F 1/1335
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