US 6,144,373 A · Picture display device and method of driving picture display device

Abstract

A method of driving a picture display device having an N number (N is an integer of not less than 2) of scanning electrodes and a plurality of data electrodes and being capable of optically responding to an effective value of a voltage applied to a pixel, which includes dividing the scanning electrodes into an M number of subgroups each having L rows, and applying voltages based on signals formed by expanding time-sequentially column vectors of an orthogonal matrix (A) having L rows to the scanning electrodes in each of the subgroups in order to select each of the subgroups together, changing, every time when a selection pulse is applied, the subgroups to which the selection pulse is applied, wherein L is 8 or less and N is 200 or more; the polarities of scanning voltages and data voltages are inverted with a periodicity of S times (S is a natural number) of a selection pulse width, and S is so determined that when an integer portion in the quotient of M/S is an even number, a remainder b satisfies S/b<12, and when an integer portion in the quotient of M/S is an odd number, a remainder b satisfies S/(S-b)<12.

Claims10

Dependent claims

dividing the scanning electrodes into an M number of subgroups each comprising L rows;
and
applying voltages based on signals formed by expanding time-sequentially column vectors of an orthogonal matrix (A) having L rows to the scanning electrode in each of the subgroups in order to select each of the subgroups together;
changing, every time when a selection pulse is applied, the subgroups to which the selection pulse is applied, wherein
L is 8 or less and N is 200 or more;
the polarities of scanning voltages and data voltages are inverted with a periodicity of S times (S is a natural number) of a selection pulse width;
and
S is so determined that when an integer portion in the quotient of M/S is an even number, a remainder b satisfies S/b<12, and when an integer portion in the quotient of M/S is an odd number, a remainder b satisfies S/(S-b)<12.

5 more elements

A picture display device having an N number (N is an integer of 200 or more) of scanning electrodes and a plurality of data electrodes and being capable of optically responding to an effective value of a voltage applied to a pixel determined as the intersection of a scanning electrode and a data electrode wherein the scanning electrodes are divided into a plurality of subgroups each comprising L rows (L is an integer ranging from 2 to 8);

voltages based on signals formed by expanding time-sequentially column vectors of an orthogonal matrix having L rows are applied to the scanning electrodes in each of the subgroups in order to select each of the subgroups together;
and voltages having at least three kinds of levels which are based on signals obtained by an orthogonal transformation of display data by an orthogonal matrix are applied to the data electrodes,
the picture display device being characterized in that:
a power source section for supplying data voltages includes dividing resistors and a voltage stabilizing circuit connected to outputs from the dividing resistors, and the voltage stabilizing circuit is so formed that the current supplying ability of a power source which supplies voltage levels for a high load in a display among data voltage levels is made larger than the current supplying ability of a power source which supplies the voltage levels for a load other than said high load.

1 more element

Dependencies are inferred from the claim text.

Picture display device and method of driving picture display device

Life of this patent

Picture display device and method of driving picture display device

Life of this patent

Abstract

Claims10