Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Patent
1997-11-07
1999-07-13
Saras, Steven J.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
345156, G09G 500
Patent
active
059233192
ABSTRACT:
A front cover assembly is provided for use with a touch sensitive display device. The touch sensitive display device includes a display such as a Cathode Ray Tube (CRT) or Liquid Crystal Display (LCD). The front cover assembly has a top cover, an infrared bezel and a piece of glass. The top cover is inserted into a mold along with the piece of glass. The top cover and glass are then held in place by a vacuum while polyurethane is injected to fill the void between the glass and the top cover and the mold. The polyurethane is injected using injection molding techniques. The polyurethane used must have the properties of flexibility, durability and must also be transparent to infrared light. The polyurethane provides a mechanical lock around the glass and top cover and thus the polyurethane compensates for the different rates of expansion and contraction of the glass and the top cover due to temperature variations in the ambient environment. The polyurethane provides a mechanical lock that prevents liquids from seeping or entering from the top portion of the front cover assembly protecting the touch sensitive display device.
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Bishop Edward H.
Connor Alfred William
Cox Aaron Roger
Crompton Dennis
McDonald Mark Gehres
Flynn John D.
International Business Machines - Corporation
Saras Steven J.
Suraci John
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