Optrex Corporation

Masakazu Kitamura

Akira Nakazawa

Makoto Nagai

Kiyoshi Tamai

Yoshinori Hirai

Driving is effected by MLA under a condition of L&ne;M or (M/L&middot;(L&plus;D) )&ne;N where M represents the total number of row electrodes, L represents the number of simultaneously selected row electrodes, D represents the number of dummy row electrodes and N represents the maximum magnifying power of a column voltage wherein driving is performed at a driving bias ratio which is deviated toward the minimum bias ratio with respect to the optimum bias ratio.

Method of driving passive matrix liquid crystal display

Presented is a driving device for a liquid crystal panel , which is provided with a controller , a memory , a row selection pattern generating circuit , a row voltage generating circuit , a latch circuit B, a column voltage generating circuit and an operating circuit (a line buffer group , a comparator circuit , adder circuits A, B, a latch circuit A and an imaginary data generating circuit ), wherein an orthogonal matrix B of 6 simultaneously selected rows and 2 imaginary rows which is formed by expanding an orthogonal matrix A of 4 rows is used for a row selection pattern, and column output voltages are operated with a unit of A.

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Yokohama, Japan

Masakazu Kitamura