Paulo Irulegui Gomes

6473075, Oct 29, 2002

Sep 29, 1999

09/408591

Paulo Irulegui Gomes - Fremont CA
Shigeki Kambara - Himeji, JP
Hiroshi Kaneda - Himeji, JP
Joel Kent - Fremont CA
Arie Ravid - Newark CA

Elo Touchsystems, Inc. - Fremont CA

G09G 500

345177, 345173, 178 1804

A method and apparatus for adapting an acoustic touchscreen controller to the operating frequency requirements of a specific touchscreen are provided. The adaptive controller can either utilize look-up tables to achieve the desired output frequency or the it can use a multi-step process in which it first determines the frequency requirements of the touchscreen, and then adjusts the burst frequency characteristics, the receiver circuit center frequency, or both in accordance with the touchscreen requirements. In one embodiment, the adaptive controller compensates for global frequency mismatch errors. In this embodiment a digital multiplier is used to modify the output of a crystal reference oscillator. The reference oscillator output is used to control the frequency of the signal from the receiving transducers and/or to generate the desired frequency of the tone burst sent to the transmitting transducers. In another embodiment that is intended to compensate for both global and local frequency variations, the adaptive controller uses a digital signal processor.

6636201, Oct 21, 2003

May 26, 2000

09/579584

Paulo Irulegui Gomes - Redwood City CA
Joel Kent - Fremont CA
James L. Aroyan - Soquel CA
Shigeki Kambara - Hyogo, JP

ELO TouchSystems, Inc. - Fremont CA

G09G 500

345173, 178 1804

An acoustic touchscreen ( ) has transmitting transducers ( ) for generating acoustic signals which are deflected across a touch-sensitive area ( ) by an array of partially acoustically reflective elements. A touch on the touch-sensitive area causes a perturbation in the acoustic signals. After traversing the touch-sensitive area, the acoustic signals are redirected by another array of partially acoustically reflective elements , towards receiving transducers ( ), where the signals (and any perturbations) are sensed. To accommodate touchscreens having narrow border regions ( ), the acoustic signals are propagated across the border regions using acoustic waveguides ( ). The waveguide confines the acoustic signals to traveling along a narrow path width, but yet permit them to be deflected across the touch-sensitive area. In this manner, the transducers and reflective elements can in turn be of narrower construction and can fit within narrow border regions.

7545365, Jun 9, 2009

Apr 13, 2005

11/106166

Joel C. Kent - Fremont CA, US
Paulo I. Gomes - Redwood City CA, US

Tyco Electronics Corporation - Middletown PA

G09G 5/00

345173

A touch sensor comprises a substrate capable of propagating acoustic waves. The substrate includes a first surface having a touch sensitive region and a first sidewall intersecting the first surface at a first edge. A transmitter is provided on the first sidewall of the substrate. The transmitter generates acoustic waves that propagate directly from the first sidewall through at least a portion of the touch sensitive region.

8325159, Dec 4, 2012

Apr 13, 2005

11/106394

Joel C. Kent - Fremont CA, US
Paulo I. Gomes - Redwood City CA, US
Robert Adler - Northbrook IL, US

Elo Touch Solutions, Inc. - Menlo Park CA

G09G 5/00

345177

A touch sensor comprises a substrate capable of propagating acoustic waves and includes a first surface having a touch sensitive region. A first sidewall intersects the first surface along a first edge. The first edge is configured to propagate a first acoustic wave along the first edge. The first acoustic wave may be a one-dimensional edge wave. A wave converter converts the first acoustic wave to a second acoustic wave, and the first surface is configured to propagate the second acoustic wave across the touch sensitive region.

20050110767, May 26, 2005

Nov 24, 2003

10/720438

Paulo Gomes - Redwood City CA, US
Erling Hansen - Redwood City CA, US
Ryo Tamaki - Clifton Park NY, US
Mark Ellsworth - Dublin CA, US
Richard Lloyd - Sunnyvale CA, US

Elo TouchSystems, Inc. - Fremont CA

G09G005/00
B32B007/12
B32B015/04

345173000, 428343000

The present invention is directed to touch sensors with arrays of switches (e.g., diodes or transistors) that can be used to selectively apply voltage gradients across a resistive touch regions of the touch sensor substrate. Touches on the touch sensor can then be sensed by measuring the voltage at the touch location on the resistive touch region. The switch arrays take the form of strips of switches that can be cut from a prefabricated reel or a sheet and applied to the touchscreen substrate.

20110254812, Oct 20, 2011

Feb 28, 2011

13/037107

Joel C. Kent - Fremont CA, US
Paulo I. Gomes - Palo Alto CA, US

G06F 3/043

345177

A touch sensor comprises a substrate capable of propagating acoustic waves. The substrate includes a first surface having a touch sensitive region. A transducer is formed on the substrate. The transducer comprises a piezoelectric element which is thermally cured after being formed on the substrate. The transducer is configured for at least one of generating acoustic waves and detecting acoustic waves. Alternatively, the transducer may include a strip comprising the piezoelectric element.

20120182269, Jul 19, 2012

Jul 15, 2011

13/184423

Joel C. Kent - Fremont CA, US
Paulo I. Gomes - Palo Alto CA, US
Robert Adler - Boise ID, US
Ingrid Adler - Boise ID, US
Paul Jerome Fehrenbach - San Jose CA, US
Yoshikazu Tanaka - Yokohama-shi, JP
Charles Dudley Copper - Hummelstown PA, US

G06F 3/043

345177

A touch sensor comprises a substrate capable of propagating acoustic waves and includes a first surface having a touch sensitive region. A first sidewall intersects the first surface along a first edge. The first edge is configured to propagate a first acoustic wave along the first edge. The first acoustic wave may be a one-dimensional edge wave. A wave converter converts the first acoustic wave to a second acoustic wave, and the first surface is configured to propagate the second acoustic wave across the touch sensitive region.

57394792, Apr 14, 1998

Mar 4, 1996

8/610260

Marcia M. Davis-Cannon - Mountain View CA
Robert De Renzi - Pleasanton CA
Paulo Irulegui Gomes - Santa Cruz CA
Joel Christopher Kent - Fremont CA
Michael LeRoy Lewis - Oakland CA
Michelle Ocampo - Fremont CA
Daniel H. Scharff - San Lenadro CA

ELO TouchSystems, Inc. - Fremont CA

G08C 2100
G09G 302

178 19

An acoustic wave touch sensor comprising an acoustic wave transducer, for transducing an acoustic wave; a substrate, having a front surface. A surface bound acoustic wave interface, having at one least bevel edge, is provided, having an transmitted acoustic wave signal attenuation of less than about 3 dB. The acoustic wave transducer is mounted to transmit the acoustic wave through the interface into the substrate, so that the energy of the acoustic wave appears at the surface. The acoustic wave transducer is mounted on a beveled region of the substrate, inclined to the front surface. The beveled edge has an effective radius which is small as compared to the wavelength and a bevel angle such that the acoustic wave is attenuated by less than about 3 dB on transmission across the edge. In this manner, means are provided to recess transducers for improved product robustness and compactness of design.