Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1989-08-18
1995-02-07
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
348758, 359 62, G09G 336
Patent
active
053879201
ABSTRACT:
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.
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Bos Philip J.
Johnson, Jr. Philip A.
Angello Paul S.
Hjerpe Richard
Tektronix Inc.
Winkelman John D.
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