Achromatic liquid crystal shutter for stereoscopic and other app

Details Achromatic liquid crystal shutter for stereoscopic and other app Achromatic liquid crystal shutter for stereoscopic and other app

1987-10-30

1989-04-11

Miller, Stanley D.

350331R, 350332, 350337, G02F 113

Patent

active

048200271

ABSTRACT:
An achromatic liquid-crystal shutter with high dynamic range, good transmission, and high speed. The inventive shutter reduces the phenomenon of "ghosting" (image doubling) that typically occurs in conventional plano-stereoscopic CRT displays due to the low dynamic range of surface mode liquid crystal electro-optical shutters included within such displays. The inventive shutter reduces crosstalk, thus allowing comfortable fusion to take place. In one preferred embodiment, the inventive shutter system is driven by a carrier-less voltage signal having time-average voltage substantially equal to zero, so that a simple, low power driving circuit suffices to drive the shutter. A pair of the inventive achromatic shutters may be employed in a wireless mode as a selection device for a field-sequential stereoscopic electronic display system.

REFERENCES:
patent: 4021846 (1977-05-01), Reese
patent: 4239349 (1980-12-01), Scheffer
patent: 4385806 (1983-05-01), Fergason
patent: 4436376 (1984-03-01), Fergason
patent: 4444469 (1984-04-01), Kaye
patent: 4522468 (1985-06-01), Goscianski et al.
patent: 4523226 (1985-06-01), Lipton et al.
patent: 4562463 (1985-12-01), Lipton
patent: 4582396 (1986-04-01), Bos et al.
patent: 4583825 (1986-04-01), Buzak
patent: 4674841 (1987-06-01), Buzak
patent: 4693562 (1987-09-01), Hasegawa et al.
patent: 4701028 (1987-10-01), Clerc et al.
patent: 4719507 (1988-01-01), Bos
patent: 4726663 (1988-02-01), Buzak
Hartmann, et al., "Three-Dimensional TV with Cordless FLC Spectacles," Information Display, Oct. 1987, pp. 15-17.
T. Haven, "A Liquid-Crystal Video Stereoscope . . . , " SPIE, vol. 761, True 3D Imaging Techniques and Display Technologies (1987), pp. 23-26.
Handbook of Optics, Edited by W. G. Driscoll (McGraw-Hill Book Company, 1978), pp. 10-127 and 10-128.
S. Pancharatnam, Parts I And II of "Achromatic Combinations of Birefringent Plates", The Proceedings of the Indian Academy of Sciences, vol. XLI, No. 4, Sec. A (1955), pp. 130-144.
Title; et al., "Achromatic Retardation Plates," SPIE, vol. 307, Polarizers and Applications (1981), pp. 120-125.
Fergason, J. L., "Use of Strong Surface Alignment in Nematic Liquid Crystals for High Speed Light Modulation,"SPIE, vol. 684 (1986), pp. 81-86.

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