1987-10-30
1991-02-26
Miller, Stanley D.
350339F, 350334, 350347R, 350379, 350174, G02F 113
Patent
active
049957023
ABSTRACT:
A projection-type display device using twisted nematic liquid crystal light valves in which the photoelectric transfer characteristics of three light valves for selectively transmitting red, green and blue light to a synthesizing device are matched. The product of the birefrigence .DELTA.n and thickness d of the twisted nematic liquid crystal and thickness of cell is selected to fall within a predetermined optimal range of values depending upon the wavelength of light which travels therethrough. The thickness d or birefrigence .DELTA.n of the twisted nematic liquid crystal material of each light valve may be the same.
REFERENCES:
patent: 3588324 (1971-06-01), Marie
patent: 3838906 (1974-10-01), Kumada
patent: 4368963 (1983-01-01), Stolov et al.
patent: 4425028 (1984-01-01), Gagnon
patent: 4448491 (1984-05-01), Okubo
patent: 4632514 (1986-12-01), Ogawa et al.
patent: 4652088 (1987-03-01), Kando et al.
patent: 4652851 (1987-03-01), Lewin
patent: 4733948 (1988-03-01), Kitahara
patent: 4749259 (1988-06-01), Ledebuhr
patent: 4904061 (1990-02-01), Aruga
The Use of the Hybrid Field Effect Mode Liquid Crystal Light Valve with Visible Spectrum Projection Light, by Bleha, et al., pp. 104-105, SID 77 Digest.
A New Color-TV Projector, by Jacobson, et al., pp. 106-107, SID 77 Digest.
Brody et al, "A 6.times.6 Inch 20 Lines-Per-Inch Liquid Crystal Display Panel", IEEE Trans. on Elec. Dev., vol. ED-20, No. 11, Nov. '73, pp. 995-1001.
Allan, "The Optimization of Twisted Nematic Display Thickness", Information Display Oct. 1983, pp. 14 & 16.
Mai Huy K.
Miller Stanley D.
Seiko Epson Corporation
LandOfFree
Projection-type display device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Projection-type display device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Projection-type display device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-290802