Half-tone liquid crystal display device

Details Half-tone liquid crystal display device Half-tone liquid crystal display device

1989-09-01

1991-11-19

Hille, Rolf

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 70, 359 74, 359 79, G02F 113

Patent

active

050661094

ABSTRACT:
In a display device, display electrodes and insulation layers are formed on a pair of substrates with a display layer placed therebetween. In this display device, plural display picture elements are set according to the arrangement state of the display electrodes. In the display picture elements, divisions are set in the insulation layers and different dielectric constants are set for each division. Therefore, the display device has a different impedance in every division within the display picture element and the apparent threshold voltage of each division may be varied. As a result, gradations corresponding to the number of divisions within each display picture element may be displayed.

REFERENCES:
patent: 4493531 (1985-01-01), Bohmer et al.
patent: 4712877 (1987-12-01), Okada et al.
patent: 4869577 (1989-09-01), Masaki
patent: 4935757 (1990-06-01), Hatano et al.
patent: 4936654 (1990-06-01), Suzaki et al.
patent: 4944577 (1990-07-01), Yoshida et al.

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