Tektronix, Inc.

Other

Philip A Johnson

Philip J Bos

Dennis R Hall

Monocular and stereoscopic color display systems, wherein passive cholesteric liquid crystal (LC) filter/mirrors and active variable retarder type LC arrays are used in combination to produce low cost, high resolution, multicolor and full color displays, suitable for use as advertising, automotive, aircraft, computer, games and electron instrumentation displays.

Chiral nematic liquid crystal polarization modulated color display for

A switchable color filter (11) includes three polarizing filters (12, 14, and 16) and two zero to substantially half-wave optical retarders (36 and 38) and is incorporated in a field sequential display system (10) to provide output states of light of three different colors to form an image in full color. Each one of four preferred embodiments (11, 11a, 11b, and 11c) of the switchable color filter provides the output states of three colors. The third and fourth preferred embodiments (11b and 11c) provide a fourth additional output state of, respectively, white light and light of a color which is a combination of two of the other output state colors. The optical retarders comprise nematic liquid crystal cells (100) having fast relaxation times to operate the display system at video rates.

Switchable color filter using electrically controllable optical retarders

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A full color stereoscopic hard copy is printed using a first group of color inks that reflect one handedness of circularly polarized light and a second group of color inks that reflect the opposite handedness of circularly polarized light. One image of a stereo pair is printed using the first group of inks and the other of the stereo pair is printed using the second group of inks.

Stereoscopic hardcopy methods

Switchable color filter and field sequential full color display system

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 operates between two states of optical retardation comprises the variable retarder to provide a color switch with substantially reduced optical response times.

Growing community of inventors

Beaverton, OR, United States of America

Philip A Johnson