Integrated liquid crystal display and digitizer having a black m

Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix

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345174, G09G 336, G09G 500

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active

058476903

ABSTRACT:
A unitary display and sensing device integrates liquid crystal display module elements of a liquid crystal display module for detecting input on a flat panel display screen with the capability for digitizing the detected inputs. In accordance with an illustrative embodiment of the present invention, display elements of a liquid crystal display module are modified to sense input on the display screen. An electrical signal is applied to modified display elements of the liquid crystal display module so that contact with a surface portion of the display screen produces an output signal indicative of its location. The integrated display and sensing device is active matrix addressed for finger input, but may also incorporate display systems for active pen input.

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