Document Type and Number:
Japanese Patent JPH0550009
Kind Code:
B2
Abstract:
Touch sensing direct input data display apparatus wherein display screen (1) is directly and solely supported within a housing by stiff springs (5) having essentially uniaxial freedom of motion. Strain gauge sensors (13) are applied directly to the springs (5) and are connected in a full Wheatstone bridge sensing circuit. The outputs of the sensors (13) are fed to a calculating device for calculating the X, Y and Z coordinate information relative to the point on the face of the display (1) which has been pushed or touched. The Z component is of total force and the X any Y components give the two dimensional location for the application of the force measured in the Z axis. The stiff springs (5) allow very little deflection to occur under normal touch imposed forces on the display screen (1). They permit essentially uniaxial motion only in the Z axis. The apparatus is mechanically robust and may be shipped and subjected to dropping or impact loads normally encountered in shipping without damage, has a relatively high natural frequency of vibration and produces high level, relatively continuous output signals for use.
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Inventors:
DEIRU RICHAADO FURAWAAZU
PATSUTO GARAREERII
KEBIN PATORITSUKU GOOFUINETSUT
ANSONIII UEIN MAIRUZU
CHAARUZU ARUBAATO RUUDOSHIIIRU
KEBIN HANTAA BUURIIIZU
PATSUTO GARAREERII
KEBIN PATORITSUKU GOOFUINETSUT
ANSONIII UEIN MAIRUZU
CHAARUZU ARUBAATO RUUDOSHIIIRU
KEBIN HANTAA BUURIIIZU
Application Number:
JP6133890A
Publication Date:
July 27, 1993
Filing Date:
March 14, 1990
Export Citation:
Assignee:
IBM
International Classes:
G06K11/06; G06F3/033; G06F3/041; G06F3/048; (IPC1-7): G06F3/033; G06K11/06