Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1994-03-15
1996-06-25
Gross, Anita Pellman
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359088, G02F 11343, G02F 11345
Patent
active
055305741
ABSTRACT:
A liquid crystal cell (60) for an optical display system has a first transparent electrode structure (62) including plural separate display electrodes (72A-72E) spaced apart from and generally parallel to a second electrode structure (64) including a common electrode (106) opposing the display electrodes across a thin layer (76) of liquid crystal material captured between the two electrode structures. Each display electrode has left (92A-92E) and right (94A-94E) ends having respective electrical contact areas (96A-96E, 98A-98E). The left and right ends of each display electrode are electrically driven with a drive signal (V.sub.DRIVE (A-E)). The common electrode has top (116) and bottom (118) ends located adjacent respective top (108) and bottom (110) side margins of the second electrode structure and having top center (120) and bottom center (122) locations with respective top and bottom electrical contact areas (124, 126). Layers (132, 134) of conductive silver paint connect a different one of the top and bottom contact areas with substantially all of the respective top and bottom ends. The top and bottom contact areas are driven with a time-varying common signal (V.sub.COMMON); the phase difference (.phi.(A-E)) between the drive signal and the common signal determines the optical retardation state of the cell segment (140A-140E) corresponding to a respective one of the display electrodes.
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Leavitt Lyle R.
Pinder Marshall J.
Gross Anita Pellman
Jandacek James W.
Nguyen Tiep H.
Preiss Richard B.
Tektronix Inc.
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