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公开(公告)号：DE69031691T2
公开(公告)日：1998-06-04
申请号：DE69031691
申请日：1990-03-13
Applicant: IBM
Inventor： FLOWERS DALE RICHARD , GALLARELLI PAT , GOFFINET KEVIN PATRICK , MILES ANTHONY WAYNE , RUDISILL CHARLES ALBERT , VORHEES KEVIN HUNTER
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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公开(公告)号：DE69016684D1
公开(公告)日：1995-03-23
申请号：DE69016684
申请日：1990-02-02
Applicant: IBM
Inventor： FLOWERS DALE RICHARD , GOFFINET KEVIN PATRICK , MILES ANTHONY WAYNE , ROWE JOHN TILLMAN , VORHEES KEVIN UNTER
Abstract: 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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公开(公告)号：DE69031691D1
公开(公告)日：1997-12-18
申请号：DE69031691
申请日：1990-03-13
Applicant: IBM
Inventor： FLOWERS DALE RICHARD , GALLARELLI PAT , GOFFINET KEVIN PATRICK , MILES ANTHONY WAYNE , RUDISILL CHARLES ALBERT , VORHEES KEVIN HUNTER
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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公开(公告)号：DE69016684T2
公开(公告)日：1995-08-17
申请号：DE69016684
申请日：1990-02-02
Applicant: IBM
Inventor： FLOWERS DALE RICHARD , GOFFINET KEVIN PATRICK , MILES ANTHONY WAYNE , ROWE JOHN TILLMAN , VORHEES KEVIN UNTER
Abstract: 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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