Input apparatus and method using optical sensing, and...

Details Input apparatus and method using optical sensing, and... Input apparatus and method using optical sensing, and...

2011-06-14

2011-06-14

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

Reexamination Certificate

active

07961176

ABSTRACT:
An input apparatus and method in a portable terminal are provided. The input apparatus includes a display unit, having a plurality of pixels; an optical sensing unit for forming a grid of optical signals in a predetermined area corresponding to the pixels of the display unit and producing location information of a pointer in the grid of optical signals; a coordinate converter for converting the location information of the pointer into coordinate information in the display unit and computing a location of a cursor in the display unit on the basis of the coordinate information; and a controller for controlling display of the cursor at the computed location in the display unit, wherein the controller identifies an operation mode of the input apparatus, and operates a portion of the optical sensing unit for key recognition if the operation mode is a key input mode.

REFERENCES:
patent: 5785439 (1998-07-01), Bowen
patent: 5848356 (1998-12-01), Jambhekar et al.
patent: 6333735 (2001-12-01), Anvekar
patent: 6429857 (2002-08-01), Masters et al.
patent: 2002/0175901 (2002-11-01), Gettemy
patent: 2003/0174125 (2003-09-01), Torunoglu et al.
patent: 1020040056390 (2004-07-01), None
patent: 1020050029589 (2005-03-01), None

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