Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1989-09-22
1992-10-20
James, Andrew J.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 62, 359 87, 340784, 340783, G02F 113
Patent
active
051575248
ABSTRACT:
Method for displaying levels of greys on a matrix display screen, such as a chiral smectic phase ferroelectric liquid crystals screen, comprising a cell containing the crystal provided on its walls with two matrix systems of right angle i line conductors and j column conductors, the various pixels of the image being defined by the superimposed crossings of these conductors, wherein each pixel is embodied with the aid of p independent sub-pixels each having its own transmission coefficient, each of which is able to display several states of different basic greys, including black and white, and, on each of the p sub-pixels, one of the states of the preceding greys is displayed by taking account, for each of these, of its own transmission so as to obtain for each pixel via the visual addition of the contributions of each sub-pixel the display of a suitable shade of grey closest to the analog value indicated by the video write signal.
REFERENCES:
patent: 4233602 (1980-11-01), Hamura
patent: 4531160 (1985-07-01), Ehn
patent: 4559535 (1985-12-01), Watkins et al.
patent: 4661809 (1987-04-01), Anderson et al.
patent: 4712877 (1987-12-01), Okada et al.
patent: 4791417 (1988-12-01), Bobak
patent: 4850675 (1989-07-01), Hatanaka et al.
patent: 4976515 (1990-12-01), Hartmann
patent: 4986637 (1991-01-01), Yamaguchi
patent: 4995703 (1991-02-01), Noguchi
Dijon Jean
Leroux Thierry
Commissariat a l''Energie Atomique
James Andrew J.
Russell Daniel N.
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