Optical: systems and elements – Optical modulator – Light wave directional modulation
Patent
1999-04-29
2000-11-14
Epps, Georgia
Optical: systems and elements
Optical modulator
Light wave directional modulation
345 51, 345 97, 345 93, 345 89, 349173, 358457, 359238, 359316, G02F 129, G09G 318, G09G 336
Patent
active
061477923
ABSTRACT:
A light modulating device, such as a ferroelectric liquid crystal display (FLCD) comprises an addressable matrix and modulating elements or pixels and associated circuitry for selectively addressing each element in a series of addressing frames in order to vary the transmission level of each element relative to the transmissions levels of the other elements. Such addressing utilises a temporal dither addressing scheme for addressing at least part of each element within each frame with different combinations of temporal dither signals applied to separately addressable temporal bits within the frame to produce different transmission levels. In order to enable a large number of grey levels to be produced whilst limiting the perceived errors at transitions between different grey levels, the temporal bits are addressed in a first order in a first frame (or in a first spatial location) and in a second order, which is different to the first order, in a second frame (or in a second spatial location). The order in which the temporal bits are addressed may be varied according to a prescribed sequence, for example alternating between successive frames, along each line or between corresponding frames on adjacent lines.
REFERENCES:
patent: 4827352 (1989-05-01), Yoneda et al.
patent: 4937682 (1990-06-01), Dalton
patent: 5282057 (1994-01-01), Mailloux et al.
patent: 5389948 (1995-02-01), Liu
patent: 5410615 (1995-04-01), Mailloux
patent: 5999242 (1989-05-01), Walton et al.
Search Report for GB Application 9809095.4; Dated Jul. 27, 1998.
European Search Report, Application No. 99302946.1, dated Jul. 9, 1999.
Graham Alistair
Jones John Clifford
Numao Takaji
Sugino Michiyuki
Epps Georgia
Lester Evelyn A.
Sharp Kabushiki Kaisha
The Secretary of State for Defence in Her Britannic Majesty's Go
LandOfFree
Light modulating devices does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Light modulating devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light modulating devices will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2070833