Title:
A TOUCH INPUT SYSTEM
Document Type and Number:
WIPO Patent Application WO2002082253
Kind Code:
A3
Abstract:
In one aspect, the present invention provides a touch input system for use with an information display system. The touch inpout system includes a frame have four sides defining a touch inpout area. On each side is positioned an array of light emitting devices. In a preferred embodiment, the light emitting devices are organic light emitting diodes. A light transmissive prism is positioned along each array of light emitting devices such that light emitted from the length emitting devices is directed across the touch input area. The system also includes light detection device positioned at each corner of the frame.
Inventors:
ARMSTRONG DONALD B
Application Number:
PCT/US2002/010623
Publication Date:
May 01, 2003
Filing Date:
April 04, 2002
Export Citation:
Assignee:
ELO TOUCHSYSTEMS INC (US)
International Classes:
G06F3/033; G06F3/042; (IPC1-7): G06K11/08
Foreign References:
| US4247767A | 1981-01-27 | |||
| DE3836429A1 | 1990-05-03 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 010, no. 135 (P - 457) 20 May 1986 (1986-05-20)
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