Driving method of driving a liquid crystal display element

Details Driving method of driving a liquid crystal display element Driving method of driving a liquid crystal display element

1995-06-07

1997-10-28

Hjerpe, Richard

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 95, 345103, 345210, G09G 336

Patent

active

056821778

ABSTRACT:
A driving method of a matrix type liquid crystal display element including at least J.times.L (J and L are respectively integers of 2 or more) row electrodes and a plural number of column electrodes wherein the J.times.L row electrodes are divided into J row electrode subgroups each including n row electrodes so that the subgroups are selected as each batch to be driven. When voltages are applied to the row electrodes, either a voltage level of +V.sub.r or -V.sub.r (where V.sub.r >0) is applied at a selection time, when a voltage at a non-selection time is 0 (zero). Voltages applied to the column electrodes are selected from (L+1) voltage levels of V.sub.0, V.sub.1, . . . , V.sub.L (where V.sub.0 <V.sub.1 . . . <V.sub.L), and when a two-valued information of the j-th line electrode subgroup (j is an integer of any of 1 through J) in a specified column in the plural column electrodes is expressed by a column vector D.sub.j having L elements (where the elements of the vector D.sub.j include 1 indicating ON and 0 indicating OFF), specific conditions must be satisfied.

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