09223442 is referenced by 2 patents and cites 41 patents.

A system and method for hover detection and touch detection in a display. In one embodiment, a first set of infrared (IR) emitters illuminates the interior of a transparent layer and the IR light is confined to the interior of the layer by total internal reflection, unless an object, such as a finger, touches the surface of the layer. Additional IR emitters at a different wavelength illuminate the volume outside of the display for hover detection. Two sets of wavelength-selective IR sensors, such as quantum dot sensors, are embedded in the display and are used to localize one or more fingers touching, or hovering near, the display.

Title
Proximity and touch sensing surface for integration with a display
Application Number
14/25660
Publication Number
9223442 (B2)
Application Date
September 12, 2013
Publication Date
December 29, 2015
Inventor
David Hoffman
Freemont
CA, US
Agent
Christie Parker & Hale
Assignee
Samsung Display
KR
IPC
G06F 3/042
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