Field emission display of uniform brightness independent of colu

Details Field emission display of uniform brightness independent of colu Field emission display of uniform brightness independent of colu

1999-05-25

2000-12-26

Wong, Don

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

3151693, G09G 310

Patent

active

061664901

ABSTRACT:
A field emission display of uniform brightness across the entire display screen. The field emission display according to the present invention includes row lines, column lines, and electron-emissive elements disposed at intersections of the row lines and column lines. The field emission display according to the present invention further includes row drivers coupled to selectively activate the row lines one row at a time and column drivers coupled to drive column voltages over the column lines. According to the present invention, the column voltages are derived from gray-scale data and a compensating voltage signal that represents a row position of the currently activated row line. In one embodiment of the present invention, the farther the currently activated row line is away from the driven ends of the column lines, the higher is the compensating voltage. Consequently, visual artifacts, specifically those caused by degradation of signals along the column lines attributed to transmission line effects, are significantly reduced or eliminated.

REFERENCES:
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patent: 5856812 (1999-01-01), Hush et al.
patent: 5909201 (1999-06-01), Hush et al.
patent: 5952987 (1999-09-01), Browning et al.
patent: 6034479 (2000-03-01), Xia

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