Electro-optic display device with increased number of transmissi

Optical: systems and elements – Holographic system or element – Using a hologram as an optical element

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359 79, 340793, G02F 113

Patent

active

052086895

ABSTRACT:
An LCD device in which the pixels are divided into sub-pixels composed of one analog adjustable sub-pixel and a plurality of digitally controlled other sub-pixels. By combining a discrete adjustment of the (sub)-transmission levels of the other sub-pixels with an analog adjustment of transmission levels of the one sub-pixel, the total number of light transmission levels is increased considerably. The analog adjustment thus is less critical because the greater part of the ultimate level is defined by the accurate discrete adjustment.

REFERENCES:
patent: 5056893 (1991-10-01), Holz et al.
patent: 5157524 (1992-10-01), Dijon et al.

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