1
Philip J Bos, Philip A Johnson Jr: Field sequential color display system using optical retardation. Tektronix, John D Winkelman, Paul S Angello, April 15, 1986: US04582396 (176 worldwide citation)

A field sequential color display system incorporates a color switch which includes a zero to half-wave optical retarder and pleochroic filters to provide an image with high color contrast and resolution over a broad range of display sizes. In a preferred embodiment, a liquid crystal cell which opera ...


2
Philip J Bos: Stereoscopic imaging system with passive viewing apparatus. Tektronix, John D Winkelman, Paul S Angello, January 12, 1988: US04719507 (137 worldwide citation)

A stereoscopic imaging system employs an image encoder that comprises a variable optical retarder which is positioned face-to-face with an image source and an image decoder that comprises only passive optical elements. In a first embodiment, the imaging system (50) uses a single variable optical ret ...


3
Joy Roy, John S Moore: Drop-on-demand ink jet print head. Tektronix, John D Winkelman, Paul S Angello, February 11, 1992: US05087930 (92 worldwide citation)

An extremely compact ink jet print head has an array of closely spaced nozzles which are supplied from densely packed ink pressure chambers by way of offset channels. The ink supply inlets leading to the pressure chambers and the offset channels are designed to provide uniform operating characterist ...


4
Thomas S Buzak, Paul C Martin, H Wayne Olmstead, John J Horn: Addressing structure using ionizable gaseous medium. Tektronix, John D Winkelman, Paul S Angello, January 23, 1990: US04896149 (89 worldwide citation)

An addressing structure uses an ionizable gas to address data storage elements (16) defined by the overlapping areas of multiple column electrodes (18) on a first substrate (48) and multiple channels (20) on a second substrate (54). A layer of dielectric material (46) separates the first and second ...


5
Philip J Bos: High contrast light shutter system. Tektronix, John D Winkelman, Paul S Angello, February 16, 1993: US05187603 (84 worldwide citation)

A light shutter system (10) incorporates a liquid crystal cell (12) operating as a variable optical retarder to selectively produce opaque and transmissive optical states corresponding to the respective first and second amounts of optical retardation of the variable optical retarder. The cell switch ...


6
Rolf S Vatne: Switchable color filter and field sequential full color display system incorporating same. Tektronix, John D Winkelman, Paul S Angello, July 19, 1988: US04758818 (80 worldwide citation)

A switchable color filter comprising a pair of twisted nematic liquid crystal devices (126 and 128) and a light polarizing system (108) which includes three color selective polarizing filters (102, 104, and 106) is incorporated as an optical subassembly in a field sequential color display system (10 ...


7
Einar O Traa: Analog-to-digital converter with error checking and correction circuits. Tektronix, Paul S Angello, Robert S Hulse, September 27, 1988: US04774498 (78 worldwide citation)

An analog-to-digital converter (10) comprises a set of comparators (12a-12f) for providing a set of different output signals whose logic states are a function of an analog input signal voltage and one or more reference voltage signals supplied by a resistive network (16). The comparators are connect ...


8
Thomas S Buzak: Light reflecting three-dimensional display system. Tektronix, John D Winkelman, Paul S Angello, June 2, 1987: US04670744 (75 worldwide citation)

A display system (10) receives from a light source (12) a sequence of images, each representing a different depth plane of a subject, and selectively reflects each image from its corresonding one of plural light direction modulators (16 and 18) to synthesize a three-dimensional image of the subject. ...


9
Thomas S Buzak: Apparatus for and methods of addressing data storage elements. Tektronix, John D Winkelman, Paul S Angello, December 31, 1991: US05077553 (74 worldwide citation)

An apparatus for and a method of addressing data storage elements (16) employs an ionizable gas to address the storage elements for storing data in and reading data out of them. The storage elements are defined by the overlapping areas of multiple column electrode (18) extending in a common directio ...


10
Thomas S Buzak: Field sequential liquid crystal display with enhanced brightness. Tektronix, John D Winkelman, Paul S Angello, September 16, 1986: US04611889 (73 worldwide citation)

An enchanced luminance field sequential color image display system having an image source for providing a sequence of monochrome images. The monochromatic light images are formed of first, second and third different spectral colors. A liquid crystal switching system having crossed color selective po ...