Donald J Elloway

US Patent:

6392750, May 21, 2002

Filed:

Aug 31, 1999

Appl. No.:

09/387632

Inventors:

John E. Field - Dorrington CA
Donald J. Elloway - Campbell CA

Assignee:

Candescent Technologies Corporation - San Jose CA

International Classification:

G01N 2147

US Classification:

356445

Abstract:

Scattered or/and transmitted light is employed to determine characteristics, including dimensional information, of an object ( ) such as part ( ) of a flat-panel display. The dimensional information includes the average diameter of openings ( ) in the object, the average density of the openings, and the average thickness of a layer ( ) of the object. Light-diffraction patterns are produced to determine characteristics, such as abnormalities ( and ), of crossing lines ( and ) in such an object.

US Patent:

6459209, Oct 1, 2002

Filed:

Jan 22, 2001

Appl. No.:

09/767329

Inventors:

Donald J. Elloway - Campbell CA
David L. Morris - San Jose CA
William J. Scannell - Menlo Park CA
Christopher J. Spindt - Menlo Park CA

Assignee:

Candescent Technologies Corporation - San Jose CA

International Classification:

G09G 310

US Classification:

3151693, 3151691, 313497, 313496, 345 77, 345 60

Abstract:

A method of removing contaminant particles in newly fabricated field emission displays. According to one embodiment of the present invention, contaminant particles are removed by a conditioning process which includes the steps of: a) driving a anode of a field emission display (FED) to a predetermined voltage; b) slowly increasing an emission current of the FED after the anode has reached the predetermined voltage; and c) providing an ion-trapping device for catching the ions and particles knocked off, or otherwise released, by emitted electrons. In this embodiment, by driving the anode to the predetermined voltage and by slowly increasing the emission current of the FED, contaminant particles are effectively removed without damaging the FED. The present invention also provides a method of operating FEDs to prevent gate-to-emitter current during turn-on and turn-off. In this embodiment, the method comprises the steps of: a) enabling the anode display screen; and, b) enabling the electron-emitters after the anode display screen is enabled.

US Patent:

6462484, Oct 8, 2002

Filed:

Feb 28, 2001

Appl. No.:

09/796868

Inventors:

James C. Dunphy - San Jose CA
Ronald L. Hansen - San Jose CA
Brian E. Lindberg - San Jose CA
Jerome M. Truppa - San Jose CA
Donald J. Elloway - Campbell CA
Duke K. Amaniampong - Campbell CA

Assignee:

Candescent Intellectual Property Services - San Jose CA

International Classification:

G09G 310

US Classification:

3151693, 3151691, 345 74, 345 76, 313497, 313495

Abstract:

A circuit and method for turning-on and turning-off elements of an field emission display (FED) device to protect against emitter electrode and gate electrode degradation. The circuit includes control logic having a sequencer which in one embodiment can be realized using a state machine. Upon power-on, the control logic sends an enable signal to a high voltage power supply that supplies voltage to the anode electrode. At this time a low voltage power supply and driving circuitry are disabled. Upon receiving a confirmation signal from the high voltage power supply, the control logic enables the low voltage power supply which supplies voltage to the driving circuitry. Upon receiving a confirmation signal from the low voltage power supply, or optionally after expiration of a predetermined time period, the control logic then enables the driving circuitry which drives the gate electrodes and the emitter electrodes which make up the rows and columns of the FED device. Upon power down, the control logic first disables the low voltage power supply, then the high voltage power supply. The above may occur upon each time the FED is powered-on and powered-off during the normal operational use of the display.

US Patent:

6624592, Sep 23, 2003

Filed:

Dec 18, 2001

Appl. No.:

10/025084

Inventors:

James C. Dunphy - San Jose CA
Donald J. Elloway - Campbell CA

Assignee:

Candescent Intellectual Property Services, Inc - Los Gatos CA
Candescent Technologies Corporation - Los Gatos CA

International Classification:

G09G 310

US Classification:

3151694, 3151693, 313496, 313495, 345 75, 345 76, 445 5, 445 53, 445 59

Abstract:

A method of removing contaminant particles from faceplates in newly fabricated field emission displays so that a uniform distribution of contaminants is achieved at the emitter sites of the display. During the initial operation of a field emission dislay device contaminants are removed from the display faceplate by electron induced desorption. The emission current profile at the emitter sites is selected so that the distribution of readsorbed contaminants is equalized. The variations in current emission compensate for shadowing effects due to spacer walls to produce a uniform readsorption distribution. The emitter sites may driven using an animated contrast image at a constant current for the display.

US Patent:

20120153970, Jun 21, 2012

Filed:

Dec 21, 2010

Appl. No.:

12/975025

Inventors:

Marc Maurice Mignard - San Jose CA, US
Donald J. Elloway - Campbell CA, US
Russel A. Martin - Menlo Park CA, US
Alok Govil - Santa Clara CA, US

Assignee:

QUALCOMM MEMS Technologies, Inc. - San Diego CA

International Classification:

G01R 27/26
H01R 43/00

US Classification:

324658, 29825

Abstract:

The present disclosure provides systems, methods, and apparatus for sensing the location(s) of conductive objects disposed near a sensor array. In one aspect, a sensor array includes a conductive row and a conductive column formed of non-transparent material(s). At least a portion of the conductive row overlaps at least a portion of the conductive column and each of the conductive rows and columns include sensing elements. The sensing elements at least partially define volumes including non-conductive and optically transparent material(s) to limit the loss of light that passes therethrough.

US Patent:

20130038565, Feb 14, 2013

Filed:

Aug 10, 2011

Appl. No.:

13/207024

Inventors:

Donald J. Elloway - San Jose CA, US
Mark M. Mignard - San Jose CA, US
William J. Cummings - Hsinchu, TW
Russel A. Martin - San Jose CA, US

Assignee:

QUALCOMM MEMS Technologies, Inc. - San Diego CA

International Classification:

G06F 3/045
G06F 3/041

US Classification:

345174, 345173

Abstract:

This disclosure provides systems, methods and apparatus for touch sensing on a display device. In one aspect, a method is provided for reducing electrical interference on a display including bi-stable display elements and touch sensing elements without a grounded shielding layer between display elements and touch sensing elements. The method may include placing at least a portion of an array of bi-stable display elements in a selected state with display driver circuitry, maintaining the display elements in the selected state, and obtaining a signal from a touch-sensing element using touch sensing driver circuitry different from the display driver circuitry when the display elements remain in the selected state.

US Patent:

20140002345, Jan 2, 2014

Filed:

Jun 29, 2012

Appl. No.:

13/538642

Inventors:

Jyotindra Raj Shakya - Sunnyvale CA, US
Russel Allyn Martin - Menlo Park CA, US
Ion Bita - San Jose CA, US
Donald John Elloway - Campbell CA, US
Rashmi Raghavendra Rao - Santa Clara CA, US

Assignee:

QUALCOMM MEMS TECHNOLOGIES, INC. - San Diego CA

International Classification:

F21V 8/00
G02B 26/00
B05D 5/06
G06F 3/01
B23P 17/00
F21V 7/04
G06F 15/00

US Classification:

345156, 362615, 362609, 359290, 345501, 29592, 427 64

Abstract:

This disclosure provides systems and methods for illumination systems with one or more reflective structures over a light guide. In one aspect, each reflective structure can have an absorber structure with a width greater than a width of the reflective structure. The absorber structure can have overhanging portions that are in parallel with and laterally protrude past one or more edges of the reflective structure, or the absorber structure can have enclosing portions that substantially enclose the reflective structure. The reflective structures can include light-turning features, such as facets, and/or conductive wires, such as touch sensor wires.

US Patent:

63073250, Oct 23, 2001

Filed:

Jan 28, 2000

Appl. No.:

9/493698

Inventors:

Donald J. Elloway - Campbell CA
David L. Morris - San Jose CA
William J. Scannell - Menlo Park CA
Christopher J. Spindt - Menlo Park CA

Assignee:

Candescent Technologies Corporation - San Jose CA

International Classification:

G09G 310

US Classification:

3151693

Abstract:

A method of removing contaminant particles in newly fabricated field emission displays. According to one embodiment of the present invention, contaminant particles are removed by a conditioning process which includes the steps of: a) driving a anode of a field emission display (FED) to a predetermined voltage; b) slowly increasing an emission current of the FED after the anode has reached the predetermined voltage; and c) providing an ion-trapping device for catching the ions and particles knocked off, or otherwise released, by emitted electrons. In this embodiment, by driving the anode to the predetermined voltage and by slowly increasing the emission current of the FED, contaminant particles are effectively removed without damaging the FED. The present invention also provides a method of operating FEDs to prevent gate-to-emitter current during turn-on and turn-off. In this embodiment, the method comprises the steps of: a) enabling the anode display screen; and, b) enabling the electron-emitters after the anode display screen is enabled.