Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1998-03-31
2000-08-15
Wu, Xiao
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 96, 345103, G09G 336
Patent
active
061043680
ABSTRACT:
A diffractive liquid crystal device includes a bistable liquid crystal arranged as pixels with each pixel being addressed by a strobe electrode and a pair of interdigitated data electrodes. A strobe generator supplies an initial blanking pulse to each of the strobe electrodes and then supplies strobe pulses in sequence to the strobe electrodes for at least several frames without any more blanking pulses. A data signal generator supplies data signals to the pairs of data electrodes which switch each pixel to a diffractive or non-diffractive state irrespective of its previous state. In particular, the strobe signals comprise pulses of opposite direction in consecutive frames. To select the non-diffractive pixel state, switching signals are applied to both the first and second electrodes during each frame. To select the diffractive pixel state, the first and second electrodes receive non-switching and switching pulses, respectively, during odd frames and switching and non-switching pulses, respectively, during even frames. This arrangement may be periodically reversed for DC compensation.
REFERENCES:
patent: 4345249 (1982-08-01), Togashi
patent: 4688896 (1987-08-01), Castleberry
patent: 5041821 (1991-08-01), Onitsuka et al.
P. W. H. Surguy et al., Ferroelectrics, vol. 122, pp. 63-79, 1991, "The "Joers/Alvey" Ferroelectric Multiplexing Scheme".
J. R. Hughes et al., Liquid Crystals, vol. 13, No. 4, pp. 597-601, 1993, "A New Set of High Speed Matrix Addressing Schemes for Ferroelectric Liquid Crystal Displays".
Bonnett Paul
Mayhew Nicholas
Robinson Michael Geraint
Tombling Craig
Towler Michael John
Sharp Kabushiki Kaisha
Wu Xiao
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