John D Fogarty

US Patent:

6388648, May 14, 2002

Filed:

Sep 8, 1999

Appl. No.:

09/391551

Inventors:

Benjamin R. Clifton - Oregon City OR
Paul E. Gulick - Tualatin OR
John P. Fogarty - Oregon City OR
Greg A. Sorenson - Tigard OR

Assignee:

Clarity Visual Systems, Inc. - Wilsonville OR

International Classification:

G09G 336

US Classification:

345 88, 345 89, 345199, 345149

Abstract:

An LCD projection unit employs a luminance and color balance system employing an LCD array characterization lookup table storing multiple sets of luminance and gamma correction values that are user selectable to control luminance and color balance. The lookup table values are determined by measuring the transfer function of the LCD array in the projection unit for each of a set of red (âRâ), green (âGâ), and blue (âBâ) input data values, converting the resulting S-curve responses to corresponding sets of gamma responses and scaling the gamma responses to generate multiple R, G, and B families of luminance and gamma corrected values. Color balance is adjusted by selecting the particular R, G, and B families of luminance and gamma corrected values that cause the LCD projection unit to match a predetermined ratio of R, G, and B luminance values. Luminance is adjusted by selecting sets of families of R, G, and B, luminance values that maintain the color balance ratio while causing the LCD to transmit the desired overall luminance. The primary colors are adjusted by a method of color mixing implemented by a mathematical matrix algorithm that generates color modification coefficients for a color space conversion circuit.

US Patent:

6924849, Aug 2, 2005

Filed:

Jun 8, 2001

Appl. No.:

09/877546

Inventors:

Benjamin R. Clifton - Oregon City OR, US
John P. Fogarty - Oregon City OR, US

Assignee:

Clarity Visual Systems, Inc. - Wilsonville OR

International Classification:

G02F001/13357
G03B021/28
G02B027/30

US Classification:

349 5, 353 99, 359618, 359641

Abstract:

A projector (N) of this invention employs a 380 mm diagonal, amorphous silicon LCD () for receiving light rays from a light source (), which achieves a small source size by employing four lamps () with small arc gaps () and a “pinwheel” mirror () that overlaps light rays from each of the arc lamps into a single collimated light bundle. The small source size produces a small cone angle () of light through the LCD. A lens () directs the narrow cone of light though the LCD at an optimal angle for achieving a 1,500:1 contrast ratio. Only a 4× magnification ratio is required to achieve a 170 cm (67 inch) diagonal projected image, which ratio enables projecting SXGA or greater resolution images with a five element projection lens (). The LCD achieves an operational life of at least 50,000 hours before projected images display color degradation.

US Patent:

60287012, Feb 22, 2000

Filed:

Aug 29, 1997

Appl. No.:

8/920399

Inventors:

Paul E. Gulick - Tualatin OR
Benjamin R. Clifton - Oregon City OR
John P. Fogarty - West Linn OR
David B. Kubeja - Portland OR

Assignee:

Clarity Visual Systems, Inc. - Wilsonville OR

International Classification:

G03B 2156
G03B 2115

US Classification:

359443

Abstract:

A mechanical package for an LCD projector includes approximately equally sized tower and enclosure portions. The tower portion is supported on forward protruding legs and contains optical and electronic modules that slide into its rear and are also accessible from the front of the enclosure portion. The enclosure portion supports on its front a removable projection screen and is mounted vertically offset on the tower portion. A triply folded optical axis provides a suitably long light pathway for projecting a large image on the projection screen without requiring the package to have an undue depth. To stack multiple packages vertically, side margins of the tower portion top surface include L-channels that receive the legs of a package stacked above. The enclosure portion further includes openings that receive the legs protruding from the tower portion stacked above. The legs are supported within the enclosure portion by sliding into U-brackets that are attached to the inner surfaces of the enclosure portion.

US Patent:

62735705, Aug 14, 2001

Filed:

Oct 21, 1999

Appl. No.:

9/425316

Inventors:

Benjamin R. Clifton - Oregon City OR
John P. Fogarty - West Linn OR

Assignee:

Clarity Visual Systems, Inc. - Wilsonville OR

International Classification:

G03B 2128

US Classification:

353 74

Abstract:

An LCD projection display (120) houses a projection module (10) in which light propagates through an LCD module (38) at a shallow angle (62) that improves the contrast ration of and intentionally Keystones the image bearing light. The Keystoned light is reflected by a fold mirror (64) that is mounted at a 52. degree. upward angle, which introduces more intentional Keystoning. A projection lens (16) is mounted coaxial to a tilted optical axis (12), but the Keystoned image bearing light is refracted about 10. degree. off the optical axis and follows a Keystoning axis (70) through the projection lens. The light propagating from the projection lens is reflected by a main fold mirror (122) that is mounted at a 57. degree. angle from the vertical to project the image bearing light onto a 10. degree. slanted projection screen (98).

US Patent:

60437979, Mar 28, 2000

Filed:

Nov 5, 1996

Appl. No.:

8/740966

Inventors:

Benjamin R. Clifton - Oregon City OR
Paul E. Gulick - Tualatin OR
John P. Fogarty - Oregon City OR

Assignee:

Clarity Visual Systems, Inc. - Wilsonville OR

International Classification:

G09G 500
G09G 336
H04N 5202
H04N 564

US Classification:

345 1

Abstract:

A liquid crystal display ("LCD") projection unit (12) employs a luminance and color balance system having a lookup table (100) storing multiple sets of gain and/or gamma corrected responses (92-99) for color balance and luminance control. The lookup table values are determined by measuring an S-curve response (90) of an LCD array (40) for each of a set of R, G, and B input data values, converting the S-curve responses to a corresponding set of gamma responses, and scaling the gamma responses to generate red ("R"), green ("G"), and blue ("B") families of gain and gamma corrected values. Color balance is adjusted by selecting the particular R, G, and B families of gain and gamma corrected values that cause the LCD projection unit to match a predetermined ratio of maximum R, G, and B luminance values. Luminance is adjusted by selecting families of lookup table values that adjust the transmittance of the LCD while maintaining the color balance. The LCD projection unit achieves a uniform luminance and color balance that renders it suitable for use in a multiscreen display system (10).

US Patent:

20150338943, Nov 26, 2015

Filed:

May 23, 2014

Appl. No.:

14/286669

Inventors:

- Redmond WA, US
Jason D. Wilson - West Linn OR, US
Ben Clifton - Oregon City OR, US
John P. Fogarty - West Linn OR, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 3/041
H04B 5/00

Abstract:

Embodiments are disclosed that relate to electrostatic communication among displays. For example, one disclosed embodiment provides a multi-touch display comprising a display stack having a display surface and one or more side surfaces bounding the display surface, a touch sensing layer comprising a plurality of transmit electrodes positioned opposite a plurality of receive electrodes, the touch sensing layer spanning the display surface and bending to extend along at least a portion of the one or more side surfaces of the display, and a controller configured to suppress driving the plurality of transmit electrodes of the touch sensing layer for an interval, and during that interval, receive configuration information from a transmit electrode of a touch sensing layer in a side surface of an adjacent display.