Thomas A Krajewski

US Patent:

7158121, Jan 2, 2007

Filed:

Oct 19, 2001

Appl. No.:

10/004054

Inventors:

Thomas G. Krajewski - La Crosse WI, US
Jeffrey J. Degroot - Onalaska WI, US

Assignee:

American Standard International Inc. - New York NY

International Classification:

G09G 3/00

US Classification:

345173, 345 76, 345157, 178 1801, 178 181, 178 1904, 3151693, 34082581

Abstract:

An enhanced touch-screen display system is disclosed for generating pixel coordinate estimates corresponding to a location on a display screen touched by a user. The system is an analog resistive touch-screen display system having a processor and associated software algorithms to allow for the calibration and validation of pixel coordinate estimates as an integral part of the real-time generation of the pixel coordinate estimates. Multiple calibrated pixel coordinate estimates are generated and processed at a pre-defined sampling rate to determine a valid pixel position to minimize sampling delays due to settling times. The x-axis position is also validated before the system attempts to generate a y-axis position to avoid the wasted time for generating y-axis estimates when x-axis estimates are corrupted. Noisy estimates are inherently reduced in the touch-screen display system by providing shunts across certain drivers in the system that also allow for detection of a “no touch” state.

US Patent:

7202858, Apr 10, 2007

Filed:

Feb 17, 2004

Appl. No.:

10/779926

Inventors:

Jeffrey J. DeGroot - Onalaska WI, US
Thomas G. Krajewski - La Crosse WI, US

Assignee:

American Standard International Inc. - New York NY

International Classification:

G09G 5/00

US Classification:

345173, 345 90, 345156, 345204, 178 1801, 178 181, 341 5

Abstract:

An enhanced touch-screen display system is disclosed for generating pixel coordinate estimates corresponding to a location on a display screen touched by a user. The system is an analog resistive touch-screen display system having a processor and associated software algorithms to allow for the calibration and validation of pixel coordinate estimates as an integral part of the real-time generation of the pixel coordinate estimates. Multiple calibrated pixel coordinate estimates are generated and processed at a pre-defined sampling rate to determine a valid pixel position to minimize sampling delays due to settling times. The x-axis position is also validated before the system attempts to generate a y-axis position to avoid the wasted time for generating y-axis estimates when x-axis estimates are corrupted. Noisy estimates are inherently reduced in the touch-screen display system by providing shunts across certain drivers in the system that also allow for detection of a “no touch” state.

US Patent:

7385593, Jun 10, 2008

Filed:

Feb 17, 2004

Appl. No.:

10/780066

Inventors:

Thomas G. Krajewski - La Crosse WI, US
Jeffrey J. DeGroot - Onalaska WI, US

Assignee:

Trane International Inc. - New York NY

International Classification:

G06F 3/041
G06F 3/045

US Classification:

345173, 178 1805

Abstract:

An enhanced touch-screen display system is disclosed for generating pixel coordinate estimates corresponding to a location on a display screen touched by a user. The system is an analog resistive touch-screen display system having a processor and associated software algorithms to allow for the calibration and validation of pixel coordinate estimates as an integral part of the real-time generation of the pixel coordinate estimates. Multiple calibrated pixel coordinate estimates are generated and processed at a pre-defined sampling rate to determine a valid pixel position to minimize sampling delays due to settling times. The x-axis position is also validated before the system attempts to generate a y-axis position to avoid the wasted time for generating y-axis estimates when x-axis estimates are corrupted. Noisy estimates are inherently reduced in the touch-screen display system by providing shunts across certain drivers in the system that also allow for detection of a “no touch” state.

US Patent:

20030214265, Nov 20, 2003

Filed:

May 20, 2002

Appl. No.:

10/153193

Inventors:

Joel VanderZee - La Crosse WI, US
Thomas Krajewski - La Crosse WI, US

International Classification:

G05B019/40

US Classification:

318/685000

Abstract:

A system for driving a stepper motor and adapting characteristic parameters of the stepper motor comprising a driver sub-system, responsive to control signals, for transferring power to the stepper motor. A power supply provides a driver current to the driver sub-system. A current detection device, responsive to the driver current, generates a digital feedback signal representative of the driver current. A digital processor, responsive to the digital feedback signal, generates the control signals. The digital processor is further responsive to a software algorithm to generate the control signals. These control signals provide functionality comprising detecting forces applied by the stepper motor to a load preventing a stall condition, adapting stepper motor speed and torque parameters, and limiting applied forces and driver current.

US Patent:

7088346, Aug 8, 2006

Filed:

Feb 17, 2004

Appl. No.:

10/779753

Inventors:

Thomas G. Krajewski - La Crosse WI, US
Jeffrey J. Degroot - Onalaska WI, US

Assignee:

American Standard International Inc. - New York NY

International Classification:

G09G 5/00

US Classification:

345173, 345157, 345204, 178 1801

Abstract:

An enhanced touch-screen display system is disclosed for generating pixel coordinate estimates corresponding to a location on a display screen touched by a user. The system is an analog resistive touch-screen display system having a processor and associated software algorithms to allow for the calibration and validation of pixel coordinate estimates as an integral part of the real-time generation of the pixel coordinate estimates. Multiple calibrated pixel coordinate estimates are generated and processed at a pre-defined sampling rate to determine a valid pixel position to minimize sampling delays due to settling times. The x-axis position is also validated before the system attempts to generate a y-axis position to avoid the wasted time for generating y-axis estimates when x-axis estimates are corrupted. Noisy estimates are inherently reduced in the touch-screen display system by providing shunts across certain drivers in the system that also allow for detection of a “no touch” state.