Japanese Patent JPH0550010

B2

A touch sensing display apparatus having improved electrical signal processing is described. A plurality of signal threshold comparison levels are employed by an electronic processing device to identify actual touch signals and to exclude extraneous vibration and offset signal components. Static thresholds of comparison are utilized at lower signal levels and a dynamic, signal tracking threshold is utilized at higher signal levels. The device is particularly effective for use in designs employing a suspended CRT display or other display devices in which the screen of the display device is directly touched by a user to record selections of information presented or to input graphical or handwritten information.

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DEIRU RICHAADO FURAWAAZU
KEBIN PATORITSUKU GOFUINETSUTO
ANSONIII UEIN MAIREZU
JON TEIRUMAN ROO JUNIA
KEBIN HANTAA BOOHEEZU

JP6134090A

July 27, 1993

March 14, 1990

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IBM

G06F3/041; G06F3/033; G06F3/048; G06F3/0487; G06K11/06; (IPC1-7): G06F3/033; G06K11/06

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