Liquid crystal half-tone display with gray level uniformity

Details Liquid crystal half-tone display with gray level uniformity Liquid crystal half-tone display with gray level uniformity

1993-03-19

1994-06-07

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 87, G02F 11343

Patent

active

053194802

ABSTRACT:
A half-tone liquid crystal display panel having half-tone pixels, each comprising a plurality of sub-pixels including first and second sub-pixels. Activation voltage is supplied to the first sub-pixel from a TFT switch and to the second sub-pixel from the TFT switch through a coupling capacitor. The second sub-pixel includes a storage capacitor. Sensitivity of the activation voltage applied to the second sub-pixel resulting from capacitance non-uniformity across the panel is reduced by forming the coupling capacitor and the storage capacitor of the second sub-pixel with the same depositions utilizing a common dielectric layer. The capacitance of the storage capacitor of the second sub-pixel is designed large compared to the capacitance of the second sub-pixel.

REFERENCES:
patent: 4840460 (1989-06-01), Bernot et al.
patent: 5126865 (1992-06-01), Sarma

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