Touch sensitive flat panel display

Details Touch sensitive flat panel display Touch sensitive flat panel display

1995-11-13

1998-07-07

Saras, Steven J.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345173, G09G 336

Patent

active

057775966

ABSTRACT:
The present invention relates to a touch sensitive LCD flat panel display. The display allows a user to provide input into a computer device by simply touching an LCD display screen with a passive device, such as a finger, stylus, or a ball point pen. The invention includes circuitry which continuously compares the charge times of the liquid crystal elements of the display to a reference value and uses the results of the comparison to determine which elements in the display are currently being touched.

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