Switched capacitor projection scan multi-touch sensor array

Details Switched capacitor projection scan multi-touch sensor array Switched capacitor projection scan multi-touch sensor array

Filed on

2011-08-23

Date issued

2011-08-23

Examiner

Hjerpe, Richard (Department: 2629)

Patent Class

Computer graphics processing and selective visual display system

SubClass

Display peripheral interface input device

SubSubClass

Touch panel

Other Related Categories

C345S173000, C178S018010

Type

Reexamination Certificate

Status

active

Patent number

08004500

Description

ABSTRACT:
A touch sensor panel can be constructed on a single surface of a substrate as a plurality of distributed RC lines arranged in rows and columns. Each distributed RC line can include alternating connected transistors and metal pads. During operation, the transistors on either side of the metal pads in the rows are alternately gated on and off using non-overlapping gate signals, and pulse travel times for each row in both directions are measured. Similar measurements are taken for the columns. The frequency at which the transistors are gated can be changed to adjust pulse travel times. Equalized travel times are computed as the sum of the pulse travel times in both directions, and indicate which rows and columns have a finger touching it. The un-equalized pulse travel time data can then be used to determine the relative positions of the fingers within the rows and columns.

REFERENCES:
patent: 4567470 (1986-01-01), Yoshikawa et al.
patent: 5113042 (1992-05-01), Mletzko
patent: 5270711 (1993-12-01), Knapp
patent: 5483261 (1996-01-01), Yasutake
patent: 5488204 (1996-01-01), Mead et al.
patent: 5825352 (1998-10-01), Bisset et al.
patent: 5835079 (1998-11-01), Shieh
patent: 5880411 (1999-03-01), Gillespie et al.
patent: 6188391 (2001-02-01), Seely et al.
patent: 6310610 (2001-10-01), Beaton et al.
patent: 6323846 (2001-11-01), Westerman et al.
patent: 6639587 (2003-10-01), Carpenter et al.
patent: 6690387 (2004-02-01), Zimmerman et al.
patent: 6819784 (2004-11-01), Sabatini et al.
patent: 7015894 (2006-03-01), Morohoshi
patent: 7184064 (2007-02-01), Zimmerman et al.
patent: 7663607 (2010-02-01), Hotelling et al.
patent: 2006/0026521 (2006-02-01), Hotelling et al.
patent: 2006/0097991 (2006-05-01), Hotelling et al.
patent: 2006/0197753 (2006-09-01), Hotelling
patent: 2006/0232567 (2006-10-01), Westerman et al.
patent: 2006/0238518 (2006-10-01), Westerman et al.
patent: 2008/0074398 (2008-03-01), Wright
patent: 2008/0158198 (2008-07-01), Elias
patent: 2009/0066665 (2009-03-01), Lee
patent: 2009/0277578 (2009-11-01), Sung et al.
patent: 2000-163031 (2000-06-01), None
patent: 2002-342033 (2002-11-01), None
Lee, “A Fast Multiple-Touch-Sensitive Input Device”, Oct. 1984, Department of Electrical Engineering, University of Toronto, pp. 1-55.
Lee, S.K. et al. (Apr. 1985). “A Multi-Touch Three Dimensional Touch-Sensitive Tablet,”Proceedings of CHI: ACM Conference on Human Factors in Computing Systems, pp. 21-25.
Rubine, D.H. (Dec. 1991). “The Automatic Recognition of Gestures,” CMU-CS-91-202, Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in Computer Science at Carnegie Mellon University, 285 pages.
Rubine, D.H. (May 1992). “Combining Gestures and Direct Manipulation,” CHI ' 92, pp. 659-660.
Westerman, W. (Spring 1999). “Hand Tracking, Finger Identification, and Chordic Manipulation on a Multi-Touch Surface,” A Dissertation Submitted to the Faculty of the University of Delaware in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in Electrical Engineering, 364 pages.
Lee, S.K. et al. (Apr. 1985). “A Multi-Touch Three Dimensional Touch-Sensitive Tablet,”Proceedings of CHI: ACM Conference on Human Factors in Computing Systems,pp. 21-25.
Rubine, D.H. (Dec. 1991). “The Automatic Recognition of Gestures,” CMU-CS-91-202, Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in Computer Science at Carnegie Mellon University, 285 pages.

Affiliated with

Also associated with

Rating

Switched capacitor projection scan multi-touch sensor array does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Switched capacitor projection scan multi-touch sensor array, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switched capacitor projection scan multi-touch sensor array will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2667898