Electroscopic picture display device having selective display of

Details Electroscopic picture display device having selective display of Electroscopic picture display device having selective display of

1985-09-16

1988-04-26

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340764, 340788, 340805, 350269, 350486, G09G 334

Patent

active

047407859

ABSTRACT:
Such a device comprises display elements (RC) arranged, for example, in matrix form in rows and columns with, each display element comprising a first (E1) and a second electrode (E2) and an intermediate, movable, third electrode (E3). The first electrode (E1) is used in common by the elements (RC) with, the second electrode (E2) forming part of a strip-shaped row electrode and the third electrodes (E3) having an electrical through-connection in the column direction. Depending on the polarities of information pulses applied to the electrodes by a control voltage source, the third electrode is positioned adjacent the first or second electrode to achieve a bright or a dark picture element on display. With picture element-selective drive by a row selection with, a change being made for the selected picture element from the bright to the dark state, a non-energized state occurs at the other bright and dark picture elements in the column. To counteract the possibility of picture disturbance, a pulse (CT2) is simultaneously applied, in addition to the information pulses (CT1), to each electrode with a polarity which is the same for the first and the second electrodes and is the opposite for the third electrode. This results in a reset with a memory state.

REFERENCES:
patent: 3520357 (1975-05-01), Castleberry et al.
patent: 4206369 (1980-06-01), Lewiner et al.
patent: 4519676 (1985-05-01), te Velde
patent: 4571585 (1986-02-01), Stein et al.

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