Phillip R Luque
Land Surveyors in Boise, ID

5867191, Feb 2, 1999

Jul 6, 1995

8/498808

Phillip R. Luque - Boise ID
James G. Bearss - Boise ID

Hewlett-Packard Company - Palo Alto CA

G03G 1506

347 55

A toner projection printer is provided with a developer surface which manifests a developer bias, and includes a cloud of entrained toner particles. A platen structure is positioned opposed to the developer surface and manifests a platen voltage that is attractive to the toner particles. An address plate is positioned between the developer surface and the platen structure. The address plate includes a determined thickness insulator with through pixel apertures. Each pixel aperture has at least first and second conductors that are electrically insulated from each other by the insulator, and a screen electrode for distorting the electric field between the address plate and the platen structure in a manner to reduce toner spreading. A first drive circuit is coupled to the first conductor for controllably applying a row drive voltage which is either a reference potential that exerts a repulsive force on the toner particles or a high voltage which is attractive to the toner particles. A second drive circuit is coupled to the second conductor for controllably applying a column voltage drive that is either a reference voltage (repulsive to the toner particles) or a high voltage (attractive to the toner particles).

5654745, Aug 5, 1997

Jul 6, 1995

8/498934

Phillip R. Luque - Boise ID

Hewlett-Packard Company - Palo Alto CA

B41J 206

347 55

A toner projection printer is provided with a developer surface which manifests a developer bias, and includes a cloud of entrained toner particles. A platen is positioned opposed to the developer surface and manifests a platen voltage that is attractive to the toner particles. An address plate is positioned between the developer surface and the conductive platen. The address plate includes a determined thickness insulator with through pixel apertures. Each pixel aperture has at least a first conductive electrode ring positioned within the insulator and connected to a drive plate that is also positioned within the insulator. A first drive circuit positioned on one side of the insulator and is capacitively coupled to the drive plate for controllably applying a row drive voltage thereto. A second drive circuit is positioned on a second side of the insulator and is capacitively coupled to the drive plate for controllably applying a column voltage drive thereto). Both the column and row drive voltages are set at levels so that only when both are high can toner particles pass through the pixel aperture and be drawn towards the platen and come under the influence of the platen voltage.

5717449, Feb 10, 1998

Jul 6, 1995

8/499015

Phillip R. Luque - Boise ID

Hewlett-Packard Company - Palo Alto CA

B41J 2385

347 55

A toner projection printer is provided with a developer surface which manifests a developer bias, and includes a cloud of entrained toner particles. A conductive platen is positioned opposed to the developer surface and manifests a platen voltage that is attractive to the toner particles. An address plate is positioned between the developer surface and the conductive platen. The address plate includes a determined thickness insulator with through pixel apertures. Each pixel aperture has at least a first and second conductors that are electrically insulated from each other by the insulator. A first drive circuit is coupled to the first conductor for controllably applying a row drive voltage which is either a reference potential that exerts a repulsive force on the toner particles or a high voltage which is attractive to the toner particles. A second drive circuit is coupled to the second conductor for controllably applying a column voltage drive that is either a reference voltage (repulsive to the toner particles) or a high voltage (attractive to the toner particles). Both the column and row drive voltages are set at levels so that only when both are high can toner particles pass through the pixel aperture, be drawn towards the conductive platen and come under influence of the platen voltage.

6726357, Apr 27, 2004

May 20, 2002

10/151412

Phillip R. Luque - Boise ID
Jeffrey S. Weaver - Ft. Collins CO

Hewlett-Packard Development Company, L.P. - Houston TX

G01N 2500

374 45, 374179, 374153, 374120, 374137

The present invention involves identifying media type in a media processing device. A system according to one embodiment of the invention includes a thermal energy source and a thermal energy sensor. The thermal energy source and thermal energy sensor are arranged along a media feed path so as to accommodate transfer of thermal energy to the media by the thermal energy source, diffusion of such thermal energy, and subsequent sensing of such diffused thermal energy to determine a heat capacity of the media, such heat capacity being indicative of media type.

6636704, Oct 21, 2003

Nov 13, 2001

10/010801

Jeffrey S. Weaver - Fort Collins CO
David J. Luman - Meridian ID
Phillip R. Luque - Boise ID

Hewlett-Packard Development Company, L.P. - Houston TX

G03G 1500

399 23, 399 45, 399393

The present invention provides an imaging system and method having a media stack component measuring system for identifying media characteristics. The imaging system includes a printer engine. A printer control system is in communication with the printer engine. A media holder is provided for holding a media stack including a plurality of sheets. A media stack component sensing system is provided which provides an output signal having a thickness component representative of sheet thickness of the sheets in the media stack.

6823148, Nov 23, 2004

Aug 15, 2003

10/641988

Jeffrey S. Weaver - Fort Collins CO
David J. Luman - Meridian ID
Phillip R. Luque - Boise ID

Hewlett-Packard Development Company, L.P. - Houston TX

G03G 1500

399 23, 399 45, 399393

The present invention provides an imaging system and method having a media stack component measuring system for identifying media characteristics. The imaging system includes a printer engine. A printer control system is in communication with the printer engine. A media holder is provided for holding a media stack including a plurality of sheets. A media stack component sensing system is provided which provides an output signal having a thickness component representative of sheet thickness of the sheets in the media stack.

6467977, Oct 22, 2002

Dec 19, 2000

09/746638

Phillip R. Luque - Boise ID
Jeffrey S. Weaver - Ft. Collins CO

Hewlett-Packard Company - Palo Alto CA

B41J 1120

400 56, 400636, 400624

This invention relates to a media weight sensor of the type that includes a transducer consisting of a metal disk with a piezoelectric element mounted in a printer so that the media going to the printer moves across the top of the resonator where an opening of the resonator is located. A soft, polymeric roller is used to press the media against the transducer. The resonant frequency of the resonator is affected by the media. The mass of the media adds to the mass of the resonator, thereby lowering the resonant frequency. Consequently, the heavier the media, the more the resonant frequency is lowered.

6198497, Mar 6, 2001

Jun 3, 1998

9/089880

Phillip R. Luque - Boise ID

Hewlett-Packard - Palo Alto CA

B41J 2435

347247

A first embodiment of an adjustment circuit for a laser diode output power compensator includes a feedback circuit for adjusting the laser diode output power compensator so that the output power of the laser diode is substantially constant. The feedback circuit includes a photodiode for measuring the output power of a VCSEL diode. The signal from the photodiode is coupled to a first amplifier. The difference between the signal from the photodiode and a first reference value is amplified and coupled through electronic switches to selectively charge one of multiple capacitors. The multiple capacitors are each coupled to one of a drive current source, a compensation current source, and a voltage controlled resistor, each of which are voltage controlled. A second amplifier is used for amplifying the difference between the signal from the photodiode and a second reference value to charge a capacitor coupled to a voltage controlled bias current source. The first embodiment of the adjustment circuit controls the bias current source, drive current source, compensation current source, and the voltage controlled resistor so that the output power of the VCSEL diode is held substantially constant.

5764667, Jun 9, 1998

Dec 9, 1996

8/762463

Phillip R. Luque - Boise ID

Hewlett-Packard Company - Palo Alto CA

H01S 300

372 38

A current steering circuit accomplishes high speed switching of drive current through a vertical cavity surface emitting laser (VCSEL) diode. The preferred embodiment of the current steering circuit includes a first and second schottky diode, connected anode to anode, as the circuit elements used to steer the current that flows into the common connection point of the schottky diodes. The cathode of the first schottky diode is connected to the anode of the VCSEL diode. The cathode of the second schottky diode is connected to one side of a network formed from three resistors. The other side of the network is connected to the output of a CMOS invertor used to buffer the video signal which controls the steering of the current. With the output of the CMOS invertor at a high level, the second schottky diode is in the off state and the first schottky diode is in the on state, forcing drive current to flow through the VCSEL diode. With the output of the CMOS invertor at a low level, the first schottky diode is in the off state and the second schottky diode is in the on state, forcing drive current to bypass the VCSEL diode.

7091427, Aug 15, 2006

Jan 28, 2003

10/353909

Phillip R. Luque - Boise ID, US
Robert E. Haines - Boise ID, US
Ben B. Tyson - Eagle ID, US
John W. Huffman - Meridian ID, US

Hewlett-Packard Development Company, L.P. - Houston TX

G01L 1/00, G01G 9/00

177210FP, 73580, 271 315

A scale is provided, the scale including a cavity having a resonant frequency which is alterable with variations in mass of a load applied to the cavity. The scale also typically includes a comparator operatively coupled with the cavity to detect actual resonant frequency under the load, to compare such actual resonant frequency with a reference resonant frequency, and to produce a difference signal indicative of mass of the load.