LCD apparatus with improved gray scale at large viewing angles a

Details LCD apparatus with improved gray scale at large viewing angles a LCD apparatus with improved gray scale at large viewing angles a

1994-05-26

1996-02-06

Weldon, Ulysses

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 87, 345 94, G09G 336

Patent

active

054899176

ABSTRACT:
A liquid crystal display apparatus in normally-white mode in which gray scale display is obtained by providing different applied voltages corresponding to different gray scale levels, respectively, characterized in that in a curve showing the relationship between the applied voltage and light transmittance, the lowest applied voltage is set so as to be shifted in the direction of a monotonically decreasing region of the curve. The display simultaneously provides both good contrast ratios and good gradation at large viewing angles, and gray scale is not inverted.

REFERENCES:
patent: 4632514 (1986-12-01), Ogawa et al.
patent: 4672357 (1987-06-01), Lorteije et al.
patent: 4769639 (1988-09-01), Kawamura et al.
patent: 4788588 (1988-11-01), Tomita
patent: 4801933 (1989-01-01), Yamamoto et al.

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